A pressure transmitter for deep sea applications

Abstract

The utility model discloses a kind of pressure transmitter of deep sea application, it is related to pressure measurement technical field.The pressure transmitter includes body assembly and deep sea cable;Body assembly contains process joint, joint accessory, sensitive core, outer tube, tail joint, two groups of pressure sensing system and multiple sealing rings, process joint, joint accessory and sensitive core are sequentially connected, outer tube two ends are connected process joint and tail joint respectively, each sealing ring is located at the connecting part of process joint and outer tube, tail joint and outer tube;Two groups of pressure sensing system are located in body assembly, and each group of pressure sensing system includes strain gauge arranged on sensitive core and the conditioning module electrically connected with strain gauge;Tail joint is provided with contact terminal male head, and deep sea cable is provided with contact terminal female seat and anti-disengagement device, contact terminal female seat and contact terminal male head cooperate to form electric circuit, and anti-disengagement device is connected with tail joint, and deep sea cable further includes wire electrically connected with contact terminal female seat.

Description

Technical Field

[0001] This application relates to the field of pressure measurement technology, and more specifically, to a pressure transmitter for deep-sea applications. Background Technology

[0002] Deep-sea pressure measurement is a crucial technological aspect of marine engineering and deep-sea exploration, placing extremely high demands on the pressure resistance, sealing reliability, and long-term stability of pressure transmitters. Currently, the sensor market for deep-sea applications is still dominated by foreign brands, with few practical application cases for domestically produced products, indicating a significant weakness in adaptability to the complex deep-sea environment. Although my country has made some breakthroughs in materials research and development, manufacturing processes, and structural design in recent years, driving technological progress in deep-sea sensors, existing deep-sea pressure transmitters still face numerous technical challenges. Some products, due to insufficient connection strength of core components and unreasonable sealing structure design, are prone to weld leakage and shell deformation under the high pressure environment of the deep sea, leading to water ingress damage to the electronics compartment. Furthermore, most products do not consider the difficulty of installation and disassembly in deep-sea operations and lack redundant backup designs. If a single pressure sensing system fails, significant costs must be incurred for underwater repair or replacement, severely impacting the continuity of deep-sea exploration and engineering operations. In addition, the connection between existing pressure transmitters and deep-sea cables often suffers from sealing defects, making it difficult to withstand long-term deep-sea high pressure and seawater corrosion. This can easily lead to signal transmission interruptions or component failures, failing to meet the actual needs of long-term stable measurement in the deep sea. Utility Model Content

[0003] This application provides a pressure transmitter for deep-sea applications, including a body assembly and a deep-sea cable. The body assembly includes a process connector, connector fittings, a sensing core, an outer tube, a tail connector, two sets of pressure sensing systems, and multiple sealing rings. The process connector, connector fittings, and sensing core are connected sequentially. One end of the outer tube is connected to the process connector, and the other end is connected to the tail connector. Each sealing ring is respectively disposed at the connection points between the process connector and the outer tube, and between the tail connector and the outer tube. Both sets of pressure sensing systems are disposed inside the body assembly. Each set of pressure sensing systems includes a strain gauge and a conditioning module. The strain gauge is disposed on the sensing core, and the conditioning module is electrically connected to the strain gauge. The tail connector has a male contact terminal, and the deep-sea cable has a female contact terminal and an anti-disconnection device. The female contact terminal and the male contact terminal are connected to form an electrical circuit. The anti-disconnection device is connected to the tail connector. The deep-sea cable also includes a conductor, which is electrically connected to the female contact terminal.

[0004] Furthermore, the process connector, connector fittings, and sensitive core are connected by a circumferential weld process, and the process connector is provided with a pressure-inducing hole.

[0005] Furthermore, the process connector, connector accessories, and sensitive core are all made of austenitic stainless steel, and the sensitive core is provided with a pressure-sensitive diaphragm at its end.

[0006] Furthermore, the strain gauge is a Wheatstone bridge structure, and the strain gauge is attached to the end of the sensitive core with special adhesive.

[0007] Furthermore, the conditioning module can convert the mV electrical signal transmitted by the strain gauge into a standard analog signal or a digital signal. The standard analog signal includes a current signal and a voltage signal, and the digital signal is a Modbus or RTU signal.

[0008] Furthermore, the process connector is connected to the outer tube by threads, and three sealing rings are provided at the connection between the process connector and the outer tube, and the three sealing rings adopt an axial sealing design.

[0009] Furthermore, the tail connector is connected to the outer tube by a thread, and the sealing ring at the connection between the tail connector and the outer tube adopts a radial sealing design.

[0010] Furthermore, the tail connector, wire, and male contact terminal are connected by a vulcanization process, and the female contact terminal, wire, and sealing ring installed on the deep-sea cable are connected by a vulcanization process.

[0011] Furthermore, the anti-detachment device is connected to the tail connector via a nut.

[0012] Furthermore, the deep-sea cable also includes a sheath that wraps around the outside of the conductor.

[0013] Beneficial effects This pressure transmitter for deep-sea applications specifically addresses the problems of existing deep-sea sensors, such as reliance on foreign brands, insufficient sealing reliability, lack of redundancy design, and susceptibility to cable connection failures. Specifically, its main components—process connectors, connector accessories, and sensing core—are connected via a specific welding process. Multiple sets of sealing rings form seals at the connections between the process connector and the outer tube, and between the tail connector and the outer tube, effectively preventing weld leakage and shell deformation under the high pressure of deep-sea conditions. This ensures the airtightness of the electronics compartment and solves the problem of water ingress damage caused by the unreasonable sealing structure of existing products. Two pressure sensing systems constitute a redundant backup design. Even if one pressure sensing system fails, the other system can still operate normally, eliminating the need for frequent underwater maintenance or replacement, reducing deep-sea operation costs, and solving the problem of non-redundant design in existing products affecting operational continuity. The tail connector and male contact terminal, as well as the female contact terminal and wire in the deep-sea cable, are connected through a vulcanization process. Combined with the anti-detachment device and the fixed fit of the tail connector, the pressure resistance and stability of the cable and transmitter connection are improved, avoiding signal transmission interruption or component failure. At the same time, the sensitive core uses specific materials and processing technology to enhance corrosion resistance, meet the long-term stable measurement requirements in the deep sea, and reduce dependence on foreign brands. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0015] Figure 1 A schematic diagram of a pressure transmitter structure for deep-sea applications provided in this embodiment of the utility model; Figure 2 A front view of a pressure transmitter for deep-sea applications provided in an embodiment of this utility model.

[0016] Figure descriptions: 1. Process connector; 1-1. Pressure inlet; 2. Sealing ring; 3. Connector fittings; 4. Strain gauge; 5. Conditioning module; 6. Outer tube; 7. Tail connector; 8. Sealing ring; 9. Wire; 10. Contact terminal (male); 11. Anti-detachment device; 12. Sealing ring; 13. Contact terminal (female); 14. Wire; 15. Deep-sea cable; 16. Sensitive core; 16-1. Pressure-sensitive diaphragm. Detailed Implementation

[0017] 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.

[0018] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0019] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0020] Example 1 refer to Figure 1 , Figure 2 This utility model relates to a pressure transmitter for deep-sea applications, such as... Figure 1 As shown, it includes a main body assembly and a deep-sea cable 15. The main body assembly is the core part for realizing pressure sensing and signal conversion, while the deep-sea cable 15 is used to realize signal transmission and power supply. The two work together through a specific structure to ensure stable operation in the deep-sea environment.

[0021] This utility model discloses a pressure transmitter for deep-sea applications, comprising a main body assembly and a deep-sea cable 15. The main body assembly is the core component for pressure sensing and signal conversion, while the deep-sea cable 15 is used for signal transmission and power supply. The two components are designed to work together to ensure stable operation in the deep-sea environment. The main body assembly includes a process connector 1, connector accessories 3, a sensitive core 16, an outer tube 6, a tail connector 7, two sets of pressure sensing systems, and multiple sealing rings 2, 8, and 12. The process connector 1, connector accessories 3, and sensitive core 16 are sequentially connected using a high-strength circumferential weld process to form an integral pressure transmission structure. The process connector 1 has pressure inlet holes 1 and 1, which penetrate the side wall of the process connector 1. One end of the pressure inlet holes 1 and 1 communicates with the external deep-sea environment, and the other end communicates with the pressure inlet cavity where the sensitive core 16 is located. This allows seawater pressure to be introduced and applied to the sensitive core 16, and the welded sealing structure prevents seawater from seeping into the electronic compartment through the weld. The process connector 1, connector accessory 3 and sensitive core 16 are all made of austenitic stainless steel. The sensitive core 16 is subjected to a special heat treatment process to improve its hardness. Its end is provided with pressure-sensitive diaphragms 16 and 1. The pressure-sensitive diaphragms 16 and 1 will undergo deformation that is linearly related to the pressure when subjected to seawater pressure.

[0022] One end of the outer tube 6 is threaded to the process connector 1, and the connection part is equipped with three sealing rings 2 with axial sealing design. The other end of the outer tube 6 is threaded to the tail connector 7, and the connection part is equipped with a sealing ring 8 with radial sealing design. The wall thickness of the outer tube 6 is precisely designed to have sufficient pressure resistance to avoid metal fatigue or collapse caused by deformation in the deep sea environment. Both pressure sensing systems are located in the closed cavity of the main body component. Each pressure sensing system includes a strain gauge 4 and a conditioning module 5. The strain gauge 4 is a Wheatstone circuit structure composed of four bridges, which is attached to the back of the pressure sensing diaphragm 16, 1 at the end of the sensitive core 16 with special adhesive. It can be completely synchronized with the deformation of the pressure sensing diaphragm 16, 1, and then convert the physical deformation into an electrical signal through the change of resistance. The conditioning module 5 is electrically connected to the strain gauge 4 through wires. It can provide working power to the strain gauge 4 and can also receive the mV level electrical signal transmitted by the strain gauge 4. After processing, it is converted into a standard analog signal or digital signal for remote transmission to the host computer.

[0023] The tail connector 7 has a male contact terminal 10 inside. The male contact terminal 10 is electrically connected to the conditioning module 5 via a wire 9. The tail connector 7, wire 9, and male contact terminal 10 are connected by a vulcanization process, which fully fills the gap between the three to ensure sealing and stable signal transmission. The deep-sea cable 15 includes an anti-detachment device 11, a sealing ring 12, a female contact terminal 13, a wire 14, and a sheath. The female contact terminal 13 and the wire 14 are electrically connected by welding. The female contact terminal 13, the wire 14, and the sealing ring 12 are processed by a vulcanization process to form a sealed whole. The sealing ring 12 is located on the outside of the female contact terminal 13. When the female contact terminal 13 and the male contact terminal 10 are connected, the sealing ring 12 can fit tightly against the inner wall of the tail connector 7 to enhance the seal. The anti-detachment device 11 is sleeved on the outside of the deep-sea cable 15 and connected to the tail connector 7 by a nut. It can limit the axial displacement of the cable and the main body assembly and prevent the contact terminal from detaching. The sheath wraps around the outside of the wire 14 to protect the wire 14.

[0024] During assembly, process connector 1, connector accessories 3, and sensitive core 16 are first welded together. Strain gauge 4 is then attached and connected to conditioning module 5. The outer tube 6 is then threaded to process connector 1 and tail connector 7 respectively, and a sealing ring is installed. Next, male contact terminal 10 and wire 9 are connected. Finally, the female contact terminal 13 of the deep-sea cable 15 is connected to male contact terminal 10, and the assembly is completed by securing the anti-detachment device 11 with a nut. During operation, seawater pressure acts on pressure-sensing diaphragms 16 and 1 through pressure inlets 1 and 1, causing them to deform. Strain gauge 4 then generates a resistance change, which is converted into a mV-level electrical signal and transmitted to conditioning module 5. After processing, conditioning module 5 transmits the signal to the host computer via contact terminals and wire 14. The two pressure-sensing systems serve as backups for each other, and multiple sealing and anti-detachment devices ensure overall sealing and structural stability.

[0025] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A pressure transmitter for deep-sea applications, characterized in that, The system includes a main body assembly and a deep-sea cable. The main body assembly includes a process connector, connector accessories, a sensitive core, an outer tube, a tail connector, two sets of pressure sensing systems, and multiple sealing rings. The process connector, connector accessories, and sensitive core are connected sequentially. One end of the outer tube is connected to the process connector, and the other end is connected to the tail connector. Each sealing ring is respectively located at the connection points between the process connector and the outer tube, and between the tail connector and the outer tube. Both sets of pressure sensing systems are located inside the main body assembly. Each set of pressure sensing systems includes a strain gauge and a conditioning module. The strain gauge is located on the sensitive core, and the conditioning module is electrically connected to the strain gauge. The tail connector has a male contact terminal, and the deep-sea cable has a female contact terminal and an anti-disconnection device. The female contact terminal and the male contact terminal are connected to form an electrical circuit. The anti-disconnection device is connected to the tail connector. The deep-sea cable also includes a conductor, which is electrically connected to the female contact terminal.

2. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The process connector, connector accessories, and sensitive core are connected by a circumferential weld process, and the process connector is provided with a pressure-inducing hole.

3. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The process connector, connector accessories, and sensitive core are all made of austenitic stainless steel, and the sensitive core is provided with a pressure-sensitive diaphragm at its end.

4. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The strain gauge is a Wheatstone bridge structure, and it is attached to the end of the sensitive core with special adhesive.

5. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The conditioning module can convert the mV electrical signal transmitted by the strain gauge into a standard analog signal or a digital signal. The standard analog signal includes a current signal and a voltage signal, and the digital signal is a Modbus or RTU signal.

6. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The process connector is connected to the outer pipe by threads. Three sealing rings are provided at the connection between the process connector and the outer pipe, and the three sealing rings adopt an axial sealing design.

7. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The tail connector is connected to the outer tube by a thread, and the sealing ring at the connection between the tail connector and the outer tube adopts a radial sealing design.

8. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The tail connector, wire, and male contact terminal are connected by a vulcanization process, and the female contact terminal, wire, and sealing ring installed on the deep-sea cable are connected by a vulcanization process.

9. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The anti-detachment device is connected to the tail connector via a nut.

10. A pressure transmitter for deep-sea applications according to claim 1, characterized in that, The deep-sea cable also includes a sheath that wraps around the outside of the conductor.

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