Multi-layer composite packaging structure of pressure-resistant waterproof sensor of deep sea pipeline

Abstract

The utility model relates to the technical field of sensor packaging, and discloses a multi-layer composite packaging structure of a pressure-resistant waterproof sensor of a deep sea pipeline, which comprises a pipeline, a mounting seat, a sensor body, a lock plate, a shell and a sealing cover, and the mounting seat is positioned on one side of the pipeline. According to the multi-layer composite packaging structure of the pressure-resistant and waterproof sensor for the deep sea pipeline, the mounting seat and the lock plate are fixed on two sides through the first screw rod and the first nut, the anti-shearing capacity in a deep sea high-pressure environment is enhanced, and meanwhile, the design that rubber inner rings on the two sides of the shell are attached to the surface of the pipeline is adopted, so that dynamic pressure compensation sealing is achieved; the insertion matching of the insertion rod and the flange at the bottom end of the sensor body is combined with the elastic buffering effect of the tension spring, so that the axial positioning accuracy of the sensor body is guaranteed, the mechanical damage of impact load to equipment is relieved, and the self-guiding function during disassembly and assembly is further optimized through the linkage structure of the connecting plate and the hole groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor packaging technical field, concretely is a kind of multilayer composite packaging structure of deep-sea pipeline pressure-proof waterproof sensor. BACKGROUND

[0002] As the key infrastructure of deep-sea resource development, submarine cable laying and transoceanic water transmission engineering, deep-sea pipeline is subjected to extreme environments such as high pressure, low temperature, corrosion and ocean current impact for a long time, and its structural health state directly affects energy transmission safety and marine ecological environment.

[0003] Traditional deep-sea sensor packaging technology mainly adopts metal shell welding sealing or O-ring static sealing, but there are the following problems: 1) insufficient pressure resistance: single material shell (such as stainless steel) is prone to plastic deformation in ultra-deep water environment, resulting in sensor failure; 2) poor long-term sealing performance: deep-sea pressure fluctuation is easy to cause traditional sealing structure (such as rubber ring) to creep or fatigue leakage; 3) material compatibility problem: the difference in thermal expansion coefficient between metal shell and internal electronic components of sensor may cause sealing interface cracking. Although the existing improvement scheme (such as titanium alloy shell or epoxy resin potting) can partially improve the pressure resistance, it often sacrifices the sensitivity or maintainability of the sensor. In addition, single-layer packaging structure is difficult to balance mechanical strength and dynamic pressure adaptability, resulting in reliability decline at extreme depth.

[0004] Therefore, it is necessary to provide a multilayer composite packaging structure of deep-sea pipeline pressure-proof waterproof sensor. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides a multilayer composite packaging structure of deep-sea pipeline pressure-proof waterproof sensor, which has the advantages of improving the sealing reliability and structural stability under deep-sea complex working conditions, and solves the problems raised in the background art.

[0006] The utility model provides the following technical scheme: a kind of multilayer composite packaging structure of deep-sea pipeline pressure-proof waterproof sensor, including pipeline, mounting seat, sensor body, lock plate, shell and sealing cover, the mounting seat is located at one side of pipeline, the lock plate is located at the other side of pipeline, and the bottom end of mounting seat is fixedly connected with screw rod one, the screw rod one is inserted with the edge wall of lock plate, and mounting seat and lock plate are fixed on the surface of pipeline by the surface of screw rod one with nut one threadedly sleeved, the top end of mounting seat is equipped with installation slot, the sensor body is movably connected in the inside of installation slot, the shell is sleeved on the surface of mounting seat and lock plate, the sealing cover is set to the top of shell, the two side edge walls of shell are equipped with slot for pipeline placement, and the slot is fixedly connected with rubber inner ring, the inner wall of rubber inner ring is attached to the surface of pipeline.

[0007] Preferably, the top of the mounting base has a slot, a rod is slidably inserted into the slot, the bottom end of the rod passes through the bottom end of the slot and is inserted into the flange at the bottom end of the sensor body, a connecting plate is fixedly connected to the top end of the rod, a tension spring is movably sleeved on the surface of the rod, the bottom end of the tension spring is fixedly connected to the bottom of the slot, and the top end of the slot is fixedly connected to the connecting plate.

[0008] Preferably, the mounting base has a side groove on both sides, the locking plate has a side groove on both sides, and the inner wall of the outer shell is fixedly connected with a rib. The side groove and the side groove are slidably engaged with the rib.

[0009] Preferably, the top four corners of the outer shell are provided with insertion holes, and the bottom four corners of the sealing cover are fixedly connected with limiting posts, which are inserted into the insertion holes.

[0010] Preferably, side strips are fixedly connected to both sides of the outer shell, and a second screw is fixedly connected to the top of the side strips. Wing plates are fixedly connected to both sides of the sealing cover. The second screw passes through the wing plate, and a second nut is threaded onto the end of the second screw.

[0011] Preferably, the inner wall of the slot on both sides of the outer shell is provided with a snap-fit ​​groove, and the bottom of both sides of the sealing cover is fixedly connected with a snap plate. The snap plate is inserted into the slot on both sides of the outer shell, and the snap strip is fixedly connected to both sides of the snap plate. The snap strip is slidably snapped into the snap-fit ​​groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This deep-sea pipeline pressure-resistant and waterproof sensor features a multi-layered composite packaging structure. The mounting base and locking plate utilize a double-sided fixing method with screws and nuts, enhancing shear resistance under high-pressure deep-sea environments. Simultaneously, the rubber inner rings on both sides of the outer shell conform to the pipeline surface, achieving dynamic pressure compensation sealing. The insertion of the insertion rod into the bottom flange of the sensor body, combined with the elastic buffering effect of a tension spring, ensures the axial positioning accuracy of the sensor body while mitigating mechanical damage from impact loads. The linkage structure between the connecting plate and the slot further optimizes the self-guiding function during assembly and disassembly. The sliding engagement structure of the mounting base and locking plate's side slots one and two with the outer shell ribs further enhances its resistance. The modular assembly system simplifies deep-sea operations, eliminates connection gaps, and enhances torsional resistance. The precise insertion of the four corner insertion holes at the top of the outer shell and the sealing cap limiting post creates a redundant sealing and positioning system to prevent displacement under high pressure. The threaded fastening structure of the side strip, screw two, and wing plate enables multi-directional adjustable pressing of the sealing cap, enhancing the uniformity of force distribution. The sliding engagement design of the snap-fit ​​groove in the outer shell slot and the sealing cap snap-fit ​​plate forms a labyrinthine sealing path. The cooperation between the snap-fit ​​strip and the snap-fit ​​groove further prevents external fluid penetration. Together with the end face seal, it forms a multi-protection system, significantly improving the sealing reliability and structural stability under complex deep-sea conditions. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0016] Figure 2 This is a schematic diagram of the outer shell structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the sealing cap structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the mounting base and locking plate structure of this utility model;

[0019] Figure 5 This is a cross-sectional view of the mounting base of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 100. Pipeline;

[0022] 200. Mounting base; 201. Side groove one; 202. Mounting groove; 203. Hole groove; 204. Insert rod; 205. Connecting plate; 206. Tension spring; 207. Screw one; 208. Nut one;

[0023] 300. Sensor body;

[0024] 400. Locking plate; 401. Side groove two;

[0025] 500. Outer shell; 501. Rubber inner ring; 502. Rib; 503. Insertion hole; 504. Snap-fit ​​groove; 505. Side strip; 506. Second screw; 507. Second nut;

[0026] 600. Sealing cover; 601. Limiting post; 602. Clamping plate; 603. Clamping strip; 604. Wing plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] In marine engineering fields such as deep-sea oil and gas extraction and seabed observation network construction, the long-term reliable operation of pipeline sensors faces challenges under extreme conditions. Current technologies for deep-sea pipeline monitoring sensors generally employ a single sealing structure (such as relying solely on O-rings or flat flanges for sealing), which lacks sufficient dynamic pressure compensation capabilities. Under the high pressure of deep sea (typically exceeding 10 MPa) and the impact of ocean currents, interface leakage easily occurs, leading to sensor failure. For example, conventional encapsulation structures lack elastic buffer components between the outer shell and the pipeline. When the pipeline undergoes slight deformation due to water pressure changes, gaps easily form on the sealing surface, allowing seawater to seep in. Furthermore, existing installation structures often rely on welding or heavy bolt fixing, leading to stress concentration at the connection points under the high pressure of deep sea environments, which can cause structural fatigue cracking after long-term service. On the other hand, the encapsulation of core sensor components (such as circuit boards and probes) has weak impact resistance. Traditional encapsulation uses a rigid fixing method. When deep-sea equipment encounters instantaneous impacts caused by turbulence or seismic waves, the rigid connection between the sensor body and the mounting base is prone to mechanical resonance, leading to solder joint breakage or signal transmission interruption. Meanwhile, the existing sealing caps and shells are mostly assembled using single-point snap-fit ​​or simple threaded connections, which are prone to fretting wear due to thermal expansion and contraction in the high-pressure environment of the deep sea, causing sealing failure.

[0030] Furthermore, existing deep-sea sensor packaging structures generally suffer from low modularity, requiring multiple assembly steps during installation. This leads to extended deep-sea operation time, increased maintenance costs, and an inability to meet the engineering requirements of segmented installation of subsea pipelines. Although some structures employ a layered design, there is a lack of collaborative sealing mechanisms between components. For example, the joint between the outer shell and the sealing cap lacks a labyrinthine barrier structure, allowing external fluids to infiltrate along the assembly gaps.

[0031] The dual-sided fixing of the mounting base and locking plate increases the system's shear strength to 250 kN / m. 2 (Tested according to ASTM D7078 standard), it is 120% better than the traditional single-sided welded structure. The leakage rate of the rubber inner ring at 10MPa pressure is <0.01mL / min (refer to GB / T 17643 standard), meeting the sealing requirements for a water depth of 3000 meters.

[0032] The sliding snap-fit ​​structure between the outer shell and the ribs, and side groove one / side groove two, shortens the on-site installation time. The slot fit tolerance is controlled within ±0.05mm, ensuring that the torsional torque after assembly is >150N·m.

[0033] Reference Figures 1-5As shown, a multi-layer composite packaging structure for a deep-sea pipeline pressure-resistant and waterproof sensor includes a pipeline 100, a mounting base 200, a sensor body 300, a locking plate 400, a housing 500, and a sealing cover 600. The mounting base 200 is located on one side of the pipeline 100, and the locking plate 400 is located on the other side of the pipeline 100. A screw 207 is fixedly connected to the bottom end of the mounting base 200. The screw 207 is inserted into the side wall of the locking plate 400, and the mounting base is secured by a nut 208 threaded onto the surface of the screw 207. Mounting base 200 and locking plate 400 are fixed to the surface of pipe 100. Mounting base 200 has a mounting groove 202 at its top. Sensor body 300 is movably snapped into the inside of mounting groove 202. Housing 500 is fitted onto the surfaces of mounting base 200 and locking plate 400. Sealing cap 600 is located at the top of housing 500. Both sides of housing 500 have slots for placing pipe 100, and rubber inner rings 501 are fixedly connected to these slots. The inner wall of the rubber inner rings 501 is in contact with the surface of pipe 100. The mounting base 200 and locking plate 400 are fixed on both sides using screws 207 and nuts 208, enhancing the shear resistance of the sensor assembly under high-pressure deep-sea conditions. The rubber inner rings 501 on both sides of housing 500 are designed to fit snugly against the surface of pipe 100, achieving dynamic pressure compensation sealing. The plug-in connection between sealing cap 600 and housing 500 forms a double-layer waterproof barrier.

[0034] In a further preferred embodiment, the top of the mounting base 200 has a slot 203, and a rod 204 is slidably inserted into the slot 203. The bottom end of the rod 204 passes through the bottom end of the slot 203 and is inserted into the flange at the bottom end of the sensor body 300. A connecting plate 205 is fixedly connected to the top end of the rod 204, and a tension spring 206 is movably sleeved on the surface of the rod 204. The bottom end of the tension spring 206 is fixedly connected to the bottom of the slot 203, and the top end of the slot 203 is fixedly connected to the connecting plate 205. The insertion and engagement of the rod 204 with the flange at the bottom end of the sensor body 300, combined with the elastic buffering effect of the tension spring 206, ensures the axial positioning accuracy of the sensor body 300 and alleviates the mechanical damage to the sensor caused by deep-sea impact loads. The linkage structure between the connecting plate 205 and the slot 203 enables a self-guiding function during sensor assembly and disassembly.

[0035] In a further preferred embodiment, the mounting base 200 has side grooves 201 on both sides, the locking plate 400 has side grooves 401 on both sides, and the inner wall of the outer shell 500 is fixedly connected to ribs 502. The side grooves 201 and 401 are slidably engaged with the ribs 502. The sliding engagement structure of the mounting base 200 and the locking plate 400 with the side grooves 201 and 401 and the outer shell 500 with the ribs 502 forms a modular assembly system, which simplifies the installation process for deep-sea operations while ensuring structural strength; the slotted engagement method effectively eliminates connection gaps and improves the torsional resistance of the overall structure.

[0036] Preferably, each of the four corners of the top of the outer shell 500 has an insertion hole 503, and each of the four corners of the bottom of the sealing cover 600 has a limiting post 601 fixedly connected to it, with the limiting post 601 inserted into the insertion hole 503. The precise insertion of the insertion hole 503 at the four corners of the top of the outer shell 500 with the limiting post 601 of the sealing cover 600 creates a redundant sealing and positioning system; the multi-angle limiting design prevents the sealing cover 600 from shifting under the high pressure of deep sea, ensuring continuous contact of the sealing surface.

[0037] In a further preferred embodiment, side strips 505 are fixedly connected to both sides of the outer casing 500, and a second screw 506 is fixedly connected to the top of the side strips 505. Wing plates 604 are fixedly connected to both sides of the sealing cover 600, and the second screw 506 passes through the wing plate 604. A second nut 507 is threadedly tightened to the end of the second screw 506. The side strips 505 on both sides of the outer casing 500, in conjunction with the threaded fastening structure of the second screw 506 and the wing plate 604, achieve multi-directional adjustable clamping of the sealing cover 600. The distribution of the wing plates 604 enhances the uniformity of stress on the sealing structure, avoiding sealing failure caused by localized stress concentration.

[0038] In a further preferred embodiment, the inner walls of the slots on both side walls of the outer casing 500 are provided with snap-fit ​​grooves 504, and the bottom ends of both side walls of the sealing cover 600 are fixedly connected with snap-fit ​​plates 602. The snap-fit ​​plates 602 are inserted into the slots on both side walls of the outer casing 500, and snap-fit ​​strips 603 are fixedly connected to both sides of the snap-fit ​​plates 602. The snap-fit ​​strips 603 are slidably snapped into the snap-fit ​​grooves 504. The sliding snap-fit ​​design of the snap-fit ​​grooves 504 in the slots of the outer casing 500 and the snap-fit ​​plates 602 of the sealing cover 600 forms a labyrinthine sealing path; the mating structure of the snap-fit ​​strips 603 and the snap-fit ​​grooves 504 effectively prevents external fluid penetration, and the combined end face seal achieves multiple protections.

[0039] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite packaging structure for a deep-sea pipeline pressure-resistant and waterproof sensor, comprising a pipeline (100), a mounting base (200), a sensor body (300), a locking plate (400), a housing (500), and a sealing cap (600), characterized in that: The mounting base (200) is located on one side of the pipe (100), and the locking plate (400) is located on the other side of the pipe (100). A screw rod (207) is fixedly connected to the bottom end of the mounting base (200). The screw rod (207) is inserted into the side wall of the locking plate (400), and the mounting base (200) and the locking plate (400) are fixed to the surface of the pipe (100) by a nut (208) threaded onto the surface of the screw rod (207). The top end of the mounting base (200) has an installation... The sensor body (300) is movably snapped into the inside of the mounting groove (202). The outer shell (500) is fitted onto the surface of the mounting base (200) and the locking plate (400). The sealing cover (600) is set on the top of the outer shell (500). The two side walls of the outer shell (500) are provided with slots for placing the pipe (100), and a rubber inner ring (501) is fixedly connected to the slot. The inner wall of the rubber inner ring (501) is in contact with the surface of the pipe (100).

2. The multi-layer composite packaging structure of a deep-sea pipeline pressure-resistant and waterproof sensor according to claim 1, characterized in that: The mounting base (200) has a slot (203) at its top end. A rod (204) is slidably inserted into the slot (203). The bottom end of the rod (204) passes through the bottom end of the slot (203) and is inserted into the flange at the bottom end of the sensor body (300). A connecting plate (205) is fixedly connected to the top end of the rod (204). A tension spring (206) is movably sleeved on the surface of the rod (204). The bottom end of the tension spring (206) is fixedly connected to the bottom of the slot (203). The top end of the slot (203) is fixedly connected to the connecting plate (205).

3. The multi-layer composite packaging structure of a deep-sea pipeline pressure-resistant and waterproof sensor according to claim 1, characterized in that: The mounting base (200) has a side groove 1 (201) on both sides, the locking plate (400) has a side groove 2 (401) on both sides, and the inner wall of the outer shell (500) is fixedly connected with a rib (502). The side groove 1 (201) and the side groove 2 (401) are slidably engaged with the rib (502).

4. The multi-layer composite packaging structure of a deep-sea pipeline pressure-resistant and waterproof sensor according to claim 1, characterized in that: The top four corners of the outer shell (500) are provided with insertion holes (503), and the bottom four corners of the sealing cover (600) are fixedly connected with limiting posts (601), and the limiting posts (601) are inserted into the insertion holes (503).

5. The multi-layer composite packaging structure of a deep-sea pipeline pressure-resistant and waterproof sensor according to claim 1, characterized in that: Both sides of the outer shell (500) are fixedly connected with side strips (505), and the top of the side strips (505) is fixedly connected with screw two (506). Both sides of the sealing cover (600) are fixedly connected with wing plates (604), the screw two (506) passes through the wing plate (604), and the end of the screw two (506) is threaded with nut two (507).

6. The multi-layer composite packaging structure of a deep-sea pipeline pressure-resistant and waterproof sensor according to claim 1, characterized in that: The inner wall of the slot on both sides of the outer shell (500) is provided with a snap-fit ​​groove (504). The bottom of both sides of the sealing cover (600) is fixedly connected with a snap-fit ​​plate (602). The snap-fit ​​plate (602) is inserted into the slot on both sides of the outer shell (500). Both sides of the snap-fit ​​plate (602) are fixedly connected with snap-fit ​​strips (603). The snap-fit ​​strips (603) are slidably snapped into the snap-fit ​​groove (504).

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