CN211123033U

CN211123033U - Deep sea conductivity sensor

Info

Publication number: CN211123033U
Application number: CN201922114704.2U
Authority: CN
Inventors: 林俊
Original assignee: Hangzhou Haixun Technology Co ltd
Current assignee: Hangzhou Haixun Technology Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-07-28
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a deep sea conductivity sensor, which comprises a shell and a sensing component, wherein an accommodating cavity is arranged in the shell, a circuit module is arranged in the accommodating cavity in a sealing way, and a sealing wiring mechanism connected with the circuit module is arranged on the shell; the pressure compensation structure is connected with the shell in a sealing mode and communicated with the containing cavity. The advantages are that: the utility model discloses circuit module with easy trouble is sealed holding the intracavity to utilize the pressure compensation structure, make the inside and outside pressure balance of casing, even in the deep sea environment, the casing can not play the guard action to circuit module and sealed wiring mechanism because of high pressure damage yet, guarantees that the sensor normally works.

Description

Deep sea conductivity sensor

Technical Field

The utility model relates to a sensor technical field especially relates to a deep sea conductivity sensor.

Background

The conductivity sensor is used for detecting conductivity underwater, and when the sensor is used in seawater, the environment is extremely severe, particularly a deep sea environment, and factors such as high pressure, seawater corrosion and humidity often damage electronic elements and influence measurement accuracy. The shell of most of the existing conductivity sensors is made of a glass tube or a plastic tube, so that the strength is low, the shell is only suitable for shallow sea and can be crushed under the deep sea high-pressure environment, and the shell of some conductivity sensors is made of stainless steel materials, is easy to damage under the deep sea high pressure and seawater corrosion, has high cost and is not suitable for full-sea deep detection.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a deep sea conductivity sensor, which ensures the normal work of the sensor by balancing the internal and external pressure of the shell through a pressure compensation structure.

The purpose of the utility model is realized by adopting the following technical scheme:

a deep sea conductivity sensor comprises a shell and a sensing assembly, wherein a cavity is formed in the shell, a circuit module is arranged in the cavity in a sealing mode, and a sealing wiring mechanism connected with the circuit module is arranged on the shell; the pressure compensation structure is connected with the shell in a sealing mode and communicated with the containing cavity.

Preferably, the pressure compensation structure comprises a capsule shell and liquid arranged in the capsule shell, the capsule shell is exposed out of the shell and made of deformable materials, and the liquid enters the accommodating cavity when the capsule shell is extruded.

Preferably, a convex pipe is arranged on the shell and communicated with the containing cavity, and the opening part of the capsule shell is sleeved on the convex pipe and is fixedly connected with the convex pipe in a sealing manner through a sealant.

Preferably, the shell is provided with a convex pipe, the convex pipe is communicated with the accommodating cavity, an annular bulge is arranged outside an opening part of the capsule shell, the shell is provided with a pressing plate, the pressing plate is provided with a through hole, the opening part of the capsule shell penetrates through the through hole and is sleeved on the convex pipe, the lower surface of the through hole is provided with an annular groove, the annular groove is matched with the annular bulge, and the pressing plate is fixedly connected with the shell and presses the annular bulge on the shell.

Preferably, a high platform is arranged on the shell, a groove is arranged on the high platform, the convex tube and the sealing wiring mechanism are located in the groove, the pressing plate is located in the groove, and the upper surface of the pressing plate is flush with the upper surface of the high platform.

Preferably, the shell is provided with a mounting hole, the convex pipe is in threaded connection with the mounting hole, the top end of the convex pipe is provided with an annular notch, the lower surface of the annular bulge is respectively abutted against the annular notch and the shell,

preferably, the shell is provided with an installation groove, an opening part of the capsule shell is sleeved with a tightening piece, a convex pipe is arranged in the installation groove and communicated with the containing cavity, the opening part of the capsule shell is sleeved on the convex pipe, and the tightening piece is in threaded connection with the inner wall of the installation groove and is matched with the convex pipe to tightly press the opening part; the tightening piece and the shell are sealed and fixed through ultrasonic welding.

Preferably, the pipe diameter of the convex pipe is larger than the diameter of the opening part of the capsule shell.

Preferably, the sensing assembly comprises a flow guide tube made of a non-metallic material, and the flow guide tube penetrates through the shell; the inner wall of the flow guide pipe is provided with circular ring electrodes which are arranged up and down, and the flow guide pipe is provided with an upper water inlet and a lower water inlet.

Preferably, a through hole is formed in the shell, the flow guide pipe is arranged in the through hole, two ends of the flow guide pipe are hermetically connected with the hole wall of the through hole of the shell, and the flow guide pipe and the shell form the cavity wall of the cavity.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses circuit module with easy trouble is sealed holding the intracavity to utilize the pressure compensation structure, make the inside and outside pressure balance of casing, even in the deep sea environment, the casing can not play the guard action to circuit module and sealed wiring mechanism because of high pressure damage yet, guarantees that the sensor normally works.

Drawings

Fig. 1 is a schematic structural diagram of a deep sea conductivity sensor according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a connection position between a pressure compensation structure and a housing according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a connection position between the pressure compensation structure and the housing according to the second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a connection position between the pressure compensation structure and the housing according to the third embodiment of the present invention.

In the figure: 10. a housing; 11. a cavity; 12. a flow guide pipe; 13. a ring electrode; 14. a high platform; 15. a groove; 16. mounting grooves; 17. sealing the wiring mechanism; 18. mounting holes; 19. a through hole; 20. a capsule shell; 21. a convex pipe; 22. pressing a plate; 23. a tightening member; 24. an opening part; 25. an annular projection; 26. an annular groove; 27. an annular gap.

Detailed Description

The present invention will now be described in more detail with reference to the accompanying drawings, and it is to be understood that the following description of the present invention is made only by way of illustration and not by way of limitation with reference to the accompanying drawings. The various embodiments may be combined with each other to form other embodiments not shown in the following description.

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Referring to fig. 1 to 4, the deep sea conductivity sensor according to the embodiment of the present invention will be explained in the following description, wherein the pressure compensation structure disposed on the housing 10 and communicated with the cavity 11 of the housing 10 realizes the balance of the internal pressure and the external pressure of the housing 10, and is not easy to break, so that the conductivity sensor is suitable for full sea depth detection.

The deep sea conductivity sensor shown in fig. 1 comprises a shell 10 and a sensing assembly, wherein a cavity 11 is arranged in the shell 10, a circuit module (not shown) is arranged in the cavity 11 in a sealing manner, and a sealing wiring mechanism 17 connected with the circuit module is arranged on the shell 10; the pressure compensation structure is connected with the shell 10 in a sealing mode and communicated with the containing cavity 11. The pressure compensation structure transmits the external seawater pressure to the inside of the shell 10, so that the internal pressure of the shell 10 is always balanced with the pressure of the external seawater, and the situation that the shell 10 of the sensor is broken in the deep sea environment and the sensor cannot work normally is avoided.

More specifically, as shown in fig. 1 to 4, the pressure compensation structure of the present invention includes a capsule shell 20 and a liquid disposed in the capsule shell 20, the capsule shell 20 is exposed on the shell 10 and made of a deformable material for transmitting seawater pressure, and the liquid enters the cavity 11 when the capsule shell 20 is squeezed; the cavity 11 is pre-filled with hydraulic oil, all electronic components arranged in the cavity 11 are sealed on the wall of the cavity 11 and isolated from the hydraulic oil, the structure in the cavity 11 is simple, the capsule shell 20 can deform to some extent under the pressure of seawater to apply pressure to the liquid in the capsule shell, and the pressure is applied to the shell 10 through conduction, so that the internal pressure and the external pressure of the shell 10 are balanced. The liquid is an incompressible fluid, so that the capsule 20 is not deformed much, and pressure can be transmitted to avoid the capsule 20 from being broken in a deep sea environment. Preferably, the liquid in the capsule may be insulating hydraulic oil, which is the same as the insulating hydraulic oil in the cavity 11, and is aviation No. 10 hydraulic oil or transformer oil in the prior art. The capsule shell 20 may be made of rubber.

The sensing component of the utility model comprises a draft tube 12 made of non-metallic materials, wherein the draft tube 12 is arranged on the shell 10 in a penetrating way; the inner wall of the draft tube 12 is provided with circular ring electrodes 13 which are arranged up and down, and the draft tube 12 is provided with an upper water inlet and a lower water outlet. More specifically, the draft tube 12 is integrally turned by precision machining. Seven ring electrodes 13 are arranged on the inner wall of the draft tube 12. The draft tube 12 is connected with the shell 10 in a sealing way, and the seam can be sealed by adopting a sealant. The upper water inlet and the lower water outlet of the flow guide pipe 12 are in a horn-mouth-shaped conical shape; the ring electrode 13 is formed by plating a platinum film electrode in a ring groove 15 on the inner wall of the draft tube 12. The rings of seven electrodes are arranged in parallel up and down and are perpendicular to the inner wall of the draft tube 12. The seven electrodes are divided into a current electrode, a voltage electrode and a grounding electrode, and two pairs of voltage electrodes and one pair of grounding electrodes are arranged in an up-down symmetrical mode by taking the middle current electrode as a center. The inner wall of the cavity 11 is packaged with a feedback circuit, a signal conversion circuit and a battery, and the signal conversion circuit is connected with the ring electrode 13. During measurement, measured seawater passes through the guide pipe 12 of the platinum film-plated seven-electrode, the excitation current iconst of the measured seawater is fed from the central current electrode, constant current signals respectively flow to the grounding electrodes, an electric field is established in a seawater medium to generate induction voltage, and the voltage at the two ends of the voltage electrode is kept constant through adjustment of a feedback circuit; and the conductivity of the measured water sample is obtained according to the voltage drop signals between the two pairs of voltage electrodes which are respectively detected, and then the conductivity is transmitted to a receiving end on the sea surface through a sealing wiring mechanism 17 connected with a signal conversion circuit for displaying and recording.

More specifically, as shown in fig. 4, the casing 10 of the present invention is provided with a through hole 19, the duct 12 is disposed in the through hole 19, two ends of the duct 12 are hermetically connected to a hole wall of the through hole 19 of the casing 10, and the duct 12 and the casing 10 form a cavity wall of the cavity 11. After the liquid in the capsule shell 20 is filled in the cavity 11, the seawater pressure is transmitted to the wall of the draft tube 12 and the inner wall of the shell 10, the inner pressure and the outer pressure on the wall of the draft tube 12 and the wall of the shell 10 are consistent, the wall of the draft tube 12 and the wall of the shell 10 are not easy to break, and the sensor can work normally.

Due to the material characteristics of the capsule shell 20, the sealing structure between the capsule shell 20 and the housing 10 is particularly important, and can effectively prevent liquid leakage or seawater from entering the cavity 11. Different capsule 20 sealing structures are described below in different embodiments.

Example one

As shown in fig. 2, the housing 10 of this embodiment is provided with a convex tube 21, the convex tube 21 is communicated with the cavity 11, and the opening 24 of the capsule shell 20 is sleeved on the convex tube 21 and is fixedly connected to the convex tube 21 by a sealant. During installation, hydraulic oil can be filled in the accommodating cavity 11, then high-pressure-resistant sealant is coated on the outer wall of the convex pipe 21, then the opening part 24 is sleeved on the convex pipe 21, and then the high-pressure-resistant sealant is coated between the outer part of the opening part 24 and the convex pipe 21 for further consolidation and sealing. Attention needs to be paid to the gluing process: the coating is uniform and the thickness is about 0.5-1 mm; after the coating is finished, external force can be applied to pressurize the coating position, gaps and bubbles are eliminated, and no leakage is guaranteed. Experiments prove that the sensor of the embodiment can normally work in the whole sea depth, and the gluing position has no leakage, safety and reliability.

Example two

As shown in fig. 3, a convex tube 21 is disposed on the housing 10 of this embodiment, the convex tube 21 is communicated with the accommodating cavity 11, an annular protrusion 25 is disposed outside an opening 24 of the capsule shell 20, a pressing plate 22 is disposed on the housing 10, a through hole is disposed on the pressing plate 22, the opening 24 of the capsule shell 20 penetrates through the through hole and is sleeved on the convex tube 21, an annular groove 26 is disposed on a lower surface of the through hole, the annular groove 26 is matched with the annular protrusion 25, and the pressing plate 22 is fixedly connected with the housing 10 to press the annular protrusion 25 on the housing 10. Because the bag body is made of deformable materials, the sealing mode of the embodiment is that the opening part 24 is properly deformed by external force, so that the bag body is tightly attached to the outer wall of the convex pipe 21, a gap is eliminated, and sealing is realized. More specifically, the annular protrusion 25 of the opening 24 corresponds to a sealing ring, the annular groove 26 of the pressure plate 22 and the upper surface of the housing 10 can wrap and press the annular protrusion 25, and the annular protrusion 25 is appropriately deformed to be tightly attached to the outer wall of the protruding tube 21 with no gap, so that the liquid in the capsule shell 20 cannot leak.

Preferably, in order to facilitate the installation of the protruding tube 21, the housing 10 is provided with an installation hole 18, the protruding tube 21 is in threaded connection with the installation hole 18, the top end of the protruding tube 21 is provided with an annular notch 27, the lower surface of the annular protrusion 25 abuts against the annular notch 27 and the housing 10, more specifically, the annular protrusion 25 covers the seam between the protruding tube 21 and the installation hole 18, and leakage between the protruding tube 21 and the installation hole 18 is avoided.

And because the protruding pipe 21 has certain length, in order to strengthen the intensity of the mounting position of the protruding pipe 21, be equipped with high platform 14 on the casing 10, be equipped with recess 15 on the high platform 14, protruding pipe 21 and sealed wiring mechanism 17 are located recess 15, clamp plate 22 is located recess 15, it is fixed with casing 10 locking through the screw, make the lower surface of clamp plate 22 hug closely with recess 15, sealed wiring mechanism 17 wears out clamp plate 22 and with clamp plate 22 sealing connection, and simultaneously, the upper surface of clamp plate 22 flushes with the upper surface of high platform 14, not only make the appearance of sensor more pleasing to the eye, avoid the sensor to take place relative displacement with casing 10 when the environment is strikeed under water simultaneously, lead to revealing.

EXAMPLE III

The shell 10 is provided with an installation groove 16, an opening part 24 of the capsule shell 20 is sleeved with a screwing piece 23, a convex pipe 21 is arranged in the installation groove 16, the convex pipe 21 is communicated with the accommodating cavity 11, the opening part 24 of the capsule shell 20 is sleeved on the convex pipe 21, and the screwing piece 23 is in threaded connection with the inner wall of the installation groove 16 and is matched with the convex pipe 21 to tightly press the opening part 24; the sealing mode of this embodiment is for utilizing external force to make opening 24 take place suitable deformation to hug closely the stand pipe 21 outer wall, eliminate the gap, realize sealedly, more specifically speaking, during the installation, establish opening 24 with revolving the piece 23 cover earlier, then overlap opening 24 on stand pipe 21, align piece 23 with mounting groove 16 soon again, screw in mounting groove 16 gradually, mounting groove 16 and the cooperation of the piece 23 of screwing, at the in-process that the piece 23 of screwing gets into mounting groove 16, compress tightly opening 24 gradually, make opening 24 and stand pipe 21 hug closely. Preferably, an extension sleeve (not shown) may be provided on the tightening member 23 to facilitate an installation tool to grip the tightening member 23 for tightening.

In this embodiment, the outer side of the lower end of the opening portion 24 may also be provided with an annular protrusion 25, the lower end of the tightening member 23 may be provided with an annular groove 26, the annular groove 26 is adapted to the annular protrusion 25, the annular protrusion 25 of the opening portion 24 is equivalent to a sealing ring, the annular groove 26 on the pressing plate 22 and the upper surface of the housing 10 may wrap and press the annular protrusion 25, the annular protrusion 25 is deformed appropriately, so that the opening portion 24 and the outer wall of the protruding tube 21 are tightly attached to each other, no gap exists, and the liquid in the capsule shell 20 cannot leak.

Preferably, in order to facilitate the installation of the protruding tube 21, the housing 10 is provided with an installation hole 18, the protruding tube 21 is in threaded connection with the installation hole 18, the top end of the protruding tube 21 is provided with an annular notch 27, the lower surface of the annular protrusion 25 abuts against the annular notch 27 and the housing 10, more specifically, the annular protrusion 25 covers the seam between the protruding tube 21 and the installation hole 18, and leakage between the protruding tube 21 and the installation hole 18 is avoided. Since the protruding pipe 21 has a certain length, in order to reinforce the strength of the installation position of the protruding pipe 21, the housing 10 is provided with the plateau 14, and the installation groove 16 is provided on the plateau 14.

In order to further enhance the sealing, the tightening member 23 and the housing 10 are sealed and fixed by ultrasonic welding, the ultrasonic welding is to transmit high-frequency vibration waves to the surfaces of two objects to be welded, and under the condition of pressurization, the surfaces of the two objects are mutually rubbed to form fusion between molecular layers, so that a gap is effectively eliminated, and leakage is avoided.

In the above embodiments, in order to further eliminate the gap between the opening 24 and the convex tube 21, the diameter of the convex tube 21 is larger than the diameter of the opening 24 of the capsule shell 20, so that the opening 24 is appropriately deformed when being sleeved on the convex tube 21, and generates a retraction force to be tightly attached to the convex tube 21.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. A deep sea conductivity sensor comprises a shell and a sensing assembly, and is characterized in that a cavity is arranged in the shell, a circuit module is arranged in the cavity in a sealing mode, and a sealing wiring mechanism connected with the circuit module is arranged on the shell; the pressure compensation structure is connected with the shell in a sealing mode and communicated with the containing cavity.

2. The deep sea conductivity sensor of claim 1, wherein said pressure compensation structure comprises a bladder shell and a liquid disposed in said bladder shell, said bladder shell being exposed on said housing and being formed of a deformable material, said liquid entering said cavity when said bladder shell is squeezed.

3. The deep-sea conductivity sensor according to claim 2, wherein a convex tube is provided on the housing, the convex tube is communicated with the cavity, and the opening of the capsule shell is sleeved on the convex tube and is fixedly connected with the convex tube in a sealing manner through a sealant.

4. The deep sea conductivity sensor according to claim 2, wherein the housing is provided with a protruding tube, the protruding tube is communicated with the accommodating cavity, an annular protrusion is provided outside the opening portion of the capsule, the housing is provided with a pressing plate, the pressing plate is provided with a through hole, the opening portion of the capsule is sleeved on the protruding tube through the through hole, an annular groove is provided on the lower surface of the through hole, the annular groove is adapted to the annular protrusion, and the pressing plate is fixedly connected to the housing to press the annular protrusion on the housing.

5. The deep sea conductivity sensor of claim 4, wherein said housing has a plateau with a groove therein, said male pipe and said sealing and wiring mechanism are located in said groove, said pressure plate is located in said groove, and an upper surface of said pressure plate is flush with an upper surface of said plateau.

6. The deep sea conductivity sensor according to claim 4, wherein the housing is provided with a mounting hole, the protruding tube is in threaded connection with the mounting hole, the top end of the protruding tube is provided with an annular notch, and the lower surface of the annular protrusion abuts against the annular notch and the housing respectively.

7. The deep sea conductivity sensor according to claim 2, wherein an installation groove is provided on the housing, a tightening member is sleeved on an opening portion of the capsule shell, a convex tube is provided in the installation groove, the convex tube is communicated with the cavity, the opening portion of the capsule shell is sleeved on the convex tube, the tightening member is in threaded connection with an inner wall of the installation groove and is matched with the convex tube to tightly press the opening portion; the tightening piece and the shell are sealed and fixed through ultrasonic welding.

8. The deep-sea conductivity sensor according to any one of claims 3 to 7, wherein a pipe diameter of the convex pipe is larger than a diameter of an opening portion of the capsule.

9. The deep sea conductivity sensor of any one of claims 1 to 7, wherein the sensing assembly comprises a flow conduit of non-metallic material disposed through the housing; the inner wall of the flow guide pipe is provided with circular ring electrodes which are arranged up and down, and the flow guide pipe is provided with an upper water inlet and a lower water outlet.

10. The deep-sea conductivity sensor according to claim 9, wherein the housing is provided with a through hole, the draft tube is disposed in the through hole, two ends of the draft tube are hermetically connected with a hole wall of the through hole of the housing, and the draft tube and the housing form a cavity wall of the cavity.