Intelligent rib material modular protection device and installation method

Abstract

The invention discloses an intelligent rib material modularization protection device and an installation method, the intelligent rib material modularization protection device comprises an anchoring sleeve, a protection sleeve, a flange, a protection sleeve cover, a flange cover and a multifunctional optical fiber connector, the front end of the protection sleeve is in threaded connection with the anchoring sleeve, and the rear end of the protection sleeve is in threaded connection with the protection sleeve cover; one end of the flange penetrates through the protective sleeve cover and is in threaded connection with the flange cover, and the other end of the flange is connected with the multifunctional optical fiber connector in the protective sleeve; an inner taper thread is arranged on the inner side of the rear end of the anchoring sleeve; outer taper threads are arranged on the outer side of the front end of the protective sleeve, and outer taper thread opening grooves which are symmetrically arranged relative to the central axis of the protective sleeve are formed in the two sides of the outer taper threads. The problems of intelligent rib material end protection, convenient installation and maintenance, long-term reliability, multifunctional integrated structure and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent monitoring of prestressed structural engineering of buildings and bridges, and in particular to an intelligent modular reinforcement protection device and an installation method. Background Art

[0002] Structural health monitoring technology is a key means to ensure the safety and reliability of various engineering structures during their service. By real-time monitoring and diagnosis of the performance status of the structure, it is possible to timely grasp the structural health status and damage development dynamics, thereby achieving early prediction and intervention of potential diseases. In recent years, with the advancement of sensing technology, structural health monitoring technology has developed rapidly, especially fiber grating sensors, with their significant advantages such as high precision, anti-electromagnetic interference, corrosion resistance, moisture resistance, small size, remote online monitoring and data upload, have become one of the core technologies for health monitoring of various engineering structures.

[0003] In the health monitoring of large engineering structures such as bridges, buildings, and tunnels, fiber Bragg grating sensors are combined with traditional structural materials such as steel strands, prestressed tendons, and geotechnical anchors to form fiber optic intelligent tendons, which are widely used in the fields of bridge cables, internal and external prestressed tendons, geotechnical anchors, and geotechnical anchor cables. These intelligent tendons can monitor the prestressed state, strain changes, and structural health in real time, providing an important basis for structural safety assessment and maintenance, thereby improving the reliability and service life of the structure.

[0004] However, due to the extensive construction at the construction site, improper operation during the installation process, and the fragile nature of optical fibers, optical fiber smart reinforcements are prone to failure during the construction process and long-term monitoring use. In particular, damage to the optical fiber at the end of the smart reinforcement and its lead wires is often the main cause of failure of the monitoring system. In practical applications, once optical fiber smart reinforcements are damaged, secondary wiring is often required, which is costly and extremely difficult to maintain. In severe cases, it may even cause waste of the entire smart reinforcement system. Therefore, how to effectively protect the optical fiber ends and lead wires to prevent them from being damaged during installation or long-term use has become a key technical challenge to ensure the stability and reliability of optical fiber smart reinforcements.

[0005] In the Chinese patent document with publication number CN211522837U, a smart steel strand lead protection structure is proposed, which can protect the lead of the smart steel strand optical fiber, and is suitable for the lead protection of smart steel strands for prestressed monitoring. In the Chinese patent document with publication number CN106121134B, a fiber-optic FRP tendon lead protection structure and its preparation method are proposed, which can protect the lead and improve the survival rate of long-term monitoring parts. However, the above patents still have shortcomings: 1. The applicable tendon material is single, and it is only applicable to steel strands or FRP tendons; 2. The use of resin glue or epoxy glue for bonding and fixing requires a long curing time, and the overall structure has low installation efficiency and cannot be disassembled for maintenance later; 3. After the lead is led out from the protection structure, it is still not suitable for bending under extreme working conditions and bearing large tensile loads, and the exposed lead is also at risk of damage.

[0006] The information disclosed in the above background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0007] In view of the above-mentioned existing defects, the purpose of the present invention is to provide a modular protection device and installation method for intelligent reinforcement, focusing on solving problems such as end protection of intelligent reinforcement, convenient installation and maintenance, long-term reliability and multifunctional integrated structure.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A modular protection device for the end of an intelligent tendon comprises an anchoring sleeve, a protective sleeve, a flange, a protective sleeve cover, a flange cover and a multifunctional optical fiber connector, wherein the front end of the protective sleeve is threadedly connected to the anchoring sleeve, the rear end of the protective sleeve is threadedly connected to the protective sleeve cover, one end of the flange passes through the protective sleeve cover and is threadedly connected to the flange cover, and the other end of the flange is connected to the multifunctional optical fiber connector in the protective sleeve; an inner conical thread is arranged on the inner side of the rear end of the anchoring sleeve; an outer conical thread is arranged on the outer side of the front end of the protective sleeve, and outer conical thread opening grooves symmetrically arranged relative to the central axis of the protective sleeve are arranged on both sides of the outer conical thread, the angles between the outer conical thread and the inner conical thread and the horizontal plane are consistent, the front end diameter of the outer conical thread is consistent with the front end diameter of the inner conical thread, and the horizontal projection length of the outer conical thread is greater than the horizontal projection length of the inner conical thread.

[0010] Furthermore, an extrusion anchoring area is provided at the front end of the anchoring sleeve.

[0011] Furthermore, a notch is provided on the outer side of the middle portion of the anchor sleeve.

[0012] Furthermore, a middle notch is provided on the outer side of the middle portion of the protective cover.

[0013] Furthermore, a tail flange positioning groove is provided on the inner side of the rear end of the protective sleeve.

[0014] Furthermore, a tail external thread is provided on the outer side of the rear end of the protective sleeve.

[0015] Furthermore, the protective cover includes an inner cover thread located at the front end of the protective cover and an inner cover flange positioning groove located at the rear end of the protective cover.

[0016] Furthermore, the optical fiber connector includes a connector part, an optical fiber, a fusion splicing point, a temperature and humidity grid point, and an optical fiber outer layer protection structure. The connector part is an optical fiber connector, one end of which is connected to an assembly consisting of an optical fiber and an optical fiber outer layer protection structure, and the other end is connected to a flange through a nut provided on the connector part. The optical fiber outer layer protection structure is connected to one end of the optical fiber, and a fusion splicing point and a temperature and humidity grid point are provided on the other end of the optical fiber.

[0017] A method for installing a modular protection device for an intelligent reinforcement end comprises the following steps:

[0018] Step 1: Pass the anchor sleeve and the protective sleeve completely through the end of the smart reinforcement, and then fuse the optical fiber of the smart reinforcement with the multifunctional optical fiber connector;

[0019] Step 2: return the anchor sleeve and the protective cover to the end of the smart reinforcement, and determine the fixed position of the anchor sleeve and the protective cover according to the length from the end of the smart reinforcement to the multifunctional optical fiber connector;

[0020] Step 3: Use a tool to fix the anchor sleeve through the notch. The inner cone thread of the anchor sleeve is connected with the outer cone thread of the protective sleeve. Use a tool to clamp the middle notch and screw the protective sleeve in until the protective sleeve is screwed in to the front end of the extrusion anchoring area and cannot be screwed in. At this time, the inner cone surface and the reinforcement are squeezed and anchored to achieve the desired effect;

[0021] Step 4: Connect the multifunctional optical fiber connector to the flange. After connection, place the flange in the tail flange positioning groove, tighten the protective cover, and firmly fix the flange between the tail flange positioning groove and the flange positioning groove in the cover;

[0022] Step 5: Tighten the flange cover;

[0023] Step 6: When the data acquisition and analysis system needs to be connected later, remove the flange cover of the modular protection device and connect it to the acquisition and analysis system through the flange.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] In addition to conventional machining methods, the device in this technical solution can also be realized by combining environmentally friendly and anti-corrosion materials (such as aluminum alloy, stainless steel, FRP, polymer materials) with 3D printing technology. The use of 3D printing combined with high-performance anti-corrosion materials breaks through the limitations of traditional manufacturing processes, reduces resource waste in the production process, meets green manufacturing requirements, and improves the accuracy of component design and personalized customization capabilities. At the same time, it ensures the uniformity and high strength of the material, significantly enhances the stability and durability of the structure, and effectively improves the protective performance and service life of the reinforcement end protection device, which is especially suitable for long-term applications in complex environments; in this field, the innovative use of mechanical extrusion methods, the combination of protection devices and intelligent reinforcements is achieved through non-bonding mechanical extrusion methods, so as to achieve the purpose of intelligent reinforcement end protection, reduce dependence on construction time and environmental conditions, avoid various problems caused by incomplete curing of bonding materials, and simplify the construction process. The process is improved, installation efficiency is improved, and the protection device can be disassembled and reused many times, which improves maintenance convenience and reduces maintenance costs; the modular design integrates the functions of optical fiber intelligent reinforcement end and joint protection, temperature and humidity monitoring, temperature compensation, etc., with high flexibility and scalability. Users can flexibly combine according to specific needs, which is suitable for large-scale projects and customized solutions according to scene requirements; the flange can be quickly connected to the acquisition and analysis system to demodulate, collect, upload and analyze data of various sensors such as the fiber Bragg grating temperature and humidity sensor inside the protection device and the fiber Bragg grating sensor of the intelligent reinforcement, realizing state perception and early warning, greatly improving the safety and management efficiency of the project; this technology provides an efficient and environmentally friendly reinforcement end protection and intelligent acquisition and analysis system by innovatively combining high-performance materials, 3D printing technology, temperature and humidity monitoring and temperature compensation technology and modular design. Its advantages are reflected in improved structural safety, construction convenience and long-term stability. It can be widely used in infrastructure projects such as bridges and tunnels, and has significant market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a modular intelligent reinforcement end protection device provided in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of an anchor sleeve provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a protective sleeve provided in an embodiment of the present invention;

[0029] Figure 4 Schematic diagram of a flange, a protective sleeve cover and a flange cover provided in an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of a multifunctional optical fiber connector provided by an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of the coordination between the anchor sleeve and the protective sleeve provided in an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the coordination of the smart reinforcement, anchor sleeve and protective sleeve provided in an embodiment of the present invention;

[0033] In the figure, 1-intelligent reinforcement; 2-modular protection device; 11-optical fiber; 12-reinforcement; 21-anchoring sleeve; 22-protective cover; 23-flange; 24-protective cover cover; 25-flange cover; 26-multifunctional optical fiber connector; 211-extrusion anchoring area; 212-slot; 213-inner cone thread; 221-outer cone thread; 222-outer cone thread opening groove; 223-middle slot; 224-rear flange positioning groove; 225-rear external thread; 226-inner cone surface. DETAILED DESCRIPTION

[0034] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the embodiments and accompanying drawings. In the description of this embodiment, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0035] like Figure 1-3As shown, a modular protection device for the end of an intelligent tendon is applied to an intelligent tendon material 1, including a modular protection device 2; the intelligent tendon material includes an optical fiber 11 and a tendon material 12; the modular protection device includes an anchoring sleeve 21, a protective sleeve 22, a flange 23, a protective sleeve cover 24, a flange cover 25, and a multifunctional optical fiber connector 26; the anchoring sleeve 21 includes an extrusion anchoring area 211, a notch 212, and an inner conical thread 213; the protective sleeve 22 includes an outer conical thread 221, an outer conical thread opening groove 222, a middle notch 223, a tail flange positioning groove 224, a tail outer thread 225, an inner conical surface 226, etc., the outer conical thread 221 and the inner conical thread 213 have the same angle with the horizontal plane, both of which are α, the horizontal projection length L1 of the outer conical thread 221 is equal to the horizontal projection length L2 of the inner conical thread 213 plus the length L3 of the extrusion anchoring area 211, and the cooperation of the outer conical thread 221 and the inner conical thread 213 has a The mating surface, that is, the major diameter of the thread at the large end face of the inner tapered thread 213 is equal to the major diameter of the thread at a certain section of the middle and rear section of the outer tapered thread 221. The mating surface is generally set at a position away from the small end face of the outer tapered thread 221 by the horizontal projection length of the inner tapered thread 213, but the position of the mating surface can be adjusted according to needs. When the outer tapered thread 221 is screwed into the inner tapered thread 213 to reach the mating surface, it is initially tightened. The outer tapered thread opening groove 222 divides the end of the protective sleeve 22 into several areas, each area is equivalent to an elastic steel sheet. When the outer tapered thread 221 continues to be tightened, it can be elastically deformed to achieve extrusion anchoring. After deformation, the inner tapered surface 226 is completely pressed against the outer surface of the reinforcement 1. The number of the outer tapered thread opening grooves 222 is greater than or equal to 2 and is evenly arranged along the circumference. The horizontal projection length of the inner tapered surface 226 depends on the required extrusion anchoring length and the outer diameter of the reinforcement 12. The angle γ between the inner tapered surface 226 and the horizontal plane has a certain relationship with the angle α through theoretical derivation. The application principle is: Figure 6-7As shown, the front end of the protective sleeve 22 is threadedly connected to the anchoring sleeve 21, the rear end of the protective sleeve 22 is threadedly connected to the protective sleeve cover 24, one end of the flange 23 passes through the protective sleeve cover 24 and is threadedly connected to the flange cover 25, and the other end of the flange 23 is connected to the multifunctional optical fiber connector 26 in the protective sleeve 22; an inner cone thread 213 is provided on the inner side of the rear end of the anchoring sleeve 21; an outer cone thread 221 is provided on the outer side of the front end of the protective sleeve 22, and outer cone thread opening grooves 222 symmetrically arranged relative to the central axis of the protective sleeve are provided on both sides of the outer cone thread 221, and the angles between the outer cone thread 221 and the inner cone thread 213 and the horizontal plane are consistent, and the outer cone thread The front end diameter of 221 is consistent with the front end diameter of the inner cone thread 213, and the horizontal projection length of the outer cone thread 221 is greater than the horizontal projection length of the inner cone thread 213. When in use, the outer cone thread 221 is continuously tightened along with the left end of the inner cone thread 213. Due to the presence of the outer cone thread opening groove 222, the outer cone thread 221 section is squeezed inward, and the inner cone surface 226 squeezes the intelligent reinforcement 1, thereby realizing the combination of the protective device and the intelligent reinforcement 1 by a non-bonding mechanical extrusion method. The mechanical extrusion combination method is stable and reliable, which reduces the dependence of the bonding material on the construction time and environmental conditions, avoids the problems caused by the incomplete curing of the bonding material, and simplifies the construction and maintenance process. With a modular design, all key components (such as anchor sleeves, protective sleeves, protective sleeve covers, optical fiber connectors, etc.) can be disassembled, replaced and repaired. This design improves the reuse rate of the protective device and significantly reduces maintenance costs.

[0036] As a preferred embodiment of the above embodiment, Figure 4 The protective cover 24 includes an inner cover thread 241 and an inner cover flange positioning groove 242; the protective cover 24 includes an inner cover thread 241 located at the front end of the protective cover 24 and an inner cover flange positioning groove 242 located at the rear end of the protective cover 24.

[0037] As a preferred embodiment of the above embodiment, Figure 5 The multifunctional optical fiber connector 26 includes a connector part 261, an optical fiber 262, a fusion point 263, a temperature grid point 264, a humidity grid point 265 and an optical fiber outer layer protection structure 266. The connector part 261 is an optical fiber connector, one end of which is connected to the assembly consisting of the optical fiber 262 and the optical fiber outer layer protection structure 266, and the other end is connected to the flange 23 through a nut provided at the connector part 261. The optical fiber outer layer protection structure 266 is connected to one end of the optical fiber 262, and the other end of the optical fiber 262 is provided with a fusion point 263, a temperature grid point 264, and a humidity grid point 265.

[0038] A method for installing a modular protection device for an intelligent reinforcement end, such as Figure 1-7As shown, the specific method is as follows: Step 1, completely pass the anchoring sleeve 21 and the protective sleeve 22 through the end of the smart reinforcement 1, and then fuse the optical fiber 11 of the smart reinforcement 1 with the multifunctional optical fiber connector 26; Step 2, retract the anchoring sleeve 21 and the protective sleeve 22 to the end of the smart reinforcement 1, and determine the fixed position of the anchoring sleeve 21 and the protective sleeve 22 according to the length from the end of the smart reinforcement 1 to the multifunctional optical fiber connector 26; Step 3, use a wrench or other tool to fix the anchoring sleeve 21 in the notch 212, the inner conical thread 213 of the anchoring sleeve 21 is connected with the outer conical thread 221 of the protective sleeve 22, and use a tool to clamp the middle notch 223 and rotate Step 4: Connect the multifunctional optical fiber connector 26 to the flange 23. After the connection, place the flange 23 in the tail flange positioning groove 224, and tighten the protective cover 24 to fix the flange 23 firmly between the tail flange positioning groove 224 and the flange positioning groove 242 inside the cover. Step 5: Tighten the flange cover 25. Step 6: When the data acquisition and analysis system needs to be connected later, remove the flange cover 25 of the modular protection device 2 and connect it to the acquisition and analysis system through the flange 23.

[0039] In actual work, the realization of smart tendon strain, load, temperature and humidity, and temperature compensation can refer to the following content. Fiber Bragg grating is cross-sensitive to strain and temperature, and the change in the central wavelength of the sensor is related to strain and temperature, as shown in formula 1. The relationship between the load of smart tendons and the change in the central wavelength of fiber Bragg grating is shown in formula 2.

[0040] Δλ=K ε Δε+K T ΔT (1)

[0041] F=K(λ-λ0)=KΔλ=K(K ε Δλ+K T ΔT) (2)

[0042] Where: Δλ is the change in the central wavelength of the smart rib fiber grating; K ε is the strain coefficient; Δε is the strain change caused by load change; K T is the temperature coefficient; ΔT is the temperature change caused by temperature change; F is the load; K is the load coefficient; λ is the measured central wavelength; λ0 is the reference wavelength, which is obtained by calibration test.

[0043] Before the intelligent reinforcement leaves the factory, the load factor K and strain factor K are obtained by controlling the influence of the calibrated ambient temperature. εHowever, in actual engineering environments, the impact of ambient temperature cannot be ignored, and temperature compensation correction is required to improve the accuracy of intelligent rib monitoring data. The temperature grid point 264 in the multifunctional optical fiber connector is only affected by temperature, and the humidity grid point 265 is only affected by humidity. The temperature and humidity grid points 264 and 265 first realize temperature and humidity monitoring. The calculation formulas are shown in formulas 3 and 4.

[0044] T=K T2 Δλ T (3)

[0045] HR=K HR Δλ HR (4)

[0046] Where: T is temperature; K T2 is the temperature coefficient of the temperature grid point 264, obtained by calibration; Δλ T is the change in the central wavelength of the temperature grid point 264; HR is the relative humidity; K HR is the temperature coefficient of the humidity grid point 265, obtained by calibration; Δλ HR is the change in the central wavelength of the humidity grid point 265.

[0047] When temperature compensation is performed on the smart rib, the central wavelength change ΔλT of the temperature grid point 264 is deducted from the central wavelength change Δλ of the smart rib to achieve temperature compensation.

[0048] The present invention has the following advantages:

[0049] 1. Modular design and replaceability. The protective device adopts modular design. All key components (such as anchor sleeve, protective sleeve, protective sleeve cover, optical fiber connector, etc.) can be disassembled, replaced and repaired. This design improves the reuse rate of the protective device and significantly reduces maintenance costs.

[0050] 2. Efficient construction and convenient maintenance. The innovative non-bonding mechanical extrusion method is used to realize the combination of the protective device and the intelligent reinforcement. The mechanical extrusion combination method is stable and reliable, which reduces the dependence of the bonding material on construction time and environmental conditions, avoids the problems caused by incomplete curing of the bonding material, and simplifies the construction and maintenance process.

[0051] 3. Integration of temperature and humidity monitoring and temperature compensation for smart reinforcement: By integrating temperature and humidity monitoring and temperature compensation functions, the device can monitor the status of smart reinforcement and the working environment, improve the accuracy of smart reinforcement monitoring, enhance data reliability and engineering safety, and also has high flexibility and scalability. It can be flexibly combined according to specific engineering needs and adapt to the customized needs of various projects, and has strong market adaptability.

[0052] Although the present invention has been described in detail above with specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. An intelligent modular reinforcement protection device, characterized in that: It includes an anchoring sleeve, a protective sleeve, a flange, a protective sleeve cover, a flange cover and a multifunctional optical fiber connector, the front end of the protective sleeve is threadedly connected to the anchoring sleeve, the rear end of the protective sleeve is threadedly connected to the protective sleeve cover, one end of the flange passes through the protective sleeve cover and is threadedly connected to the flange cover, and the other end of the flange is connected to the multifunctional optical fiber connector in the protective sleeve; an inner conical thread is arranged on the inner side of the rear end of the anchoring sleeve; an outer conical thread is arranged on the outer side of the front end of the protective sleeve, and outer conical thread opening grooves symmetrically arranged relative to the central axis of the protective sleeve are arranged on both sides of the outer conical thread, the angles between the outer conical thread and the inner conical thread and the horizontal plane are consistent, the front end diameter of the outer conical thread is consistent with the front end diameter of the inner conical thread, and the horizontal projection length of the outer conical thread is greater than the horizontal projection length of the inner conical thread.

2. According to claim 1, the intelligent reinforcement modular protection device is characterized in that: An extrusion anchoring area is arranged at the front end of the anchoring sleeve.

3. According to claim 1, the intelligent reinforcement modular protection device is characterized in that: A notch is arranged on the outer side of the middle part of the anchor sleeve.

4. According to claim 1, the intelligent reinforcement modular protection device is characterized in that: A middle notch is arranged on the outer side of the middle part of the protective cover.

5. According to claim 1, the intelligent reinforcement modular protection device is characterized in that: A tail external thread is arranged on the outer side of the rear end of the protective sleeve.

6. According to claim 1, the intelligent reinforcement modular protection device is characterized by: The protective sleeve cover comprises an inner cover thread located at the front end of the protective sleeve cover and an inner cover flange positioning groove located at the rear end of the protective sleeve cover.

7. According to claim 1, the intelligent reinforcement modular protection device is characterized by: The optical fiber connector includes a connector part, an optical fiber, a fusion splicing point, a temperature and humidity grid point, and an optical fiber outer layer protection structure. The connector part is an optical fiber connector, one end of which is connected to an assembly consisting of an optical fiber and an optical fiber outer layer protection structure, and the other end is connected to a flange through a nut provided at the connector part. The optical fiber outer layer protection structure is connected to one end of the optical fiber, and the other end of the optical fiber is provided with a fusion splicing point and a temperature and humidity grid point.

8. A method for installing a modular protection device for an intelligent reinforcement end, characterized in that: The following steps are involved: Step 1: Pass the anchor sleeve and the protective sleeve completely through the end of the smart reinforcement, and then fuse the optical fiber of the smart reinforcement with the multifunctional optical fiber connector; Step 2: return the anchor sleeve and the protective cover to the end of the smart reinforcement, and determine the fixed position of the anchor sleeve and the protective cover according to the length from the end of the smart reinforcement to the multifunctional optical fiber connector; Step 3: Use a tool to fix the anchor sleeve through the notch. The inner cone thread of the anchor sleeve is connected with the outer cone thread of the protective sleeve. Use a tool to clamp the middle notch and screw the protective sleeve in until the protective sleeve is screwed in to the front end of the extrusion anchoring area and cannot be screwed in. At this time, the inner cone surface and the reinforcement are squeezed and anchored to achieve the desired effect; Step 4: Connect the multifunctional optical fiber connector to the flange. After connection, place the flange in the tail flange positioning groove, tighten the protective cover, and firmly fix the flange between the tail flange positioning groove and the flange positioning groove in the cover; Step 5: Tighten the flange cover; Step 6: When the data acquisition and analysis system needs to be connected later, remove the flange cover of the modular protection device and connect it to the acquisition and analysis system through the flange.

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