CN105928742B - Static pressure trigger-type deep-sea hydrophore - Google Patents

Abstract

The invention discloses a static pressure trigger type deep-sea water collection device, which comprises a cover type water collection tank and a static pressure trigger device; the static pressure trigger device is installed on the side wall of the water collection device bottle body; the static pressure The trigger device includes a lower support platform, a crush tank, a trigger rod, a spring, a spring cavity, and an upper support platform; the crush tank is installed on the lower support platform; the lower end of the trigger rod is fixedly connected to the crush tank; The trigger rod is installed in the spring chamber; a spring is arranged between the trigger rod and the spring chamber; the upper support platform is arranged on the upper part of the spring chamber, and the upper end of the trigger rod is arranged on the through hole of the upper support platform ; The lower support platform, the spring cavity and the upper support platform are all fixedly connected to the side wall of the water collector bottle. In the present invention, the water harvester is triggered by pure mechanical static pressure. Since its structure does not involve electromagnetic aspects, the requirements for the sealing performance of the device are not high, which greatly reduces the cost.

Description

Static pressure trigger deep sea water collector

technical field

The invention relates to the technical field of marine equipment, in particular to a static pressure trigger type deep sea water sampling device.

Background technique

With the depletion of land non-renewable resources and the continuous discovery of marine mineral resources such as oil, natural gas, oceanic polymetallic nodules (crusts) and hydrothermal sulfides, it is becoming a trend to search for seabed mineralization areas. By sampling seawater and analyzing and detecting its composition, not only can the investigation and evaluation of deep-sea resources such as natural gas hydrates in the water mining area be realized, it can provide important high-tech support for the delineation of target areas, and it can also be used for my country's deep-sea development. Provide equipment support for basic research such as tracing of physical, chemical and biological change processes, deep-sea biogeochemical cycle processes and mechanisms, global climate and environment evolution mechanisms and predictions, and other basic research.

For now, the triggering device of the water sampling device is divided into the following types: 1) triggering the hammer - when collecting water at a specified depth, rely on the system's water sampling signal or release the hammer. The release mechanism is released, the upper and lower covers are quickly closed under the action of the elastic restoring force of the rubber band, and the water sample in the bottle is sealed in the bottle. This structure is simple and easy to use, but the controllability is poor, and it is not suitable for deep sea operations with complex environments. 2) Electromagnetic triggering—relying on the sensor, when a certain depth is reached, the central controller sends a sampling signal to realize electromagnetic conversion, so that the release hook is decoupled, and under the action of the rubber belt tension, it can be quickly closed. This triggering method has great requirements on the tightness of the device, but due to the complex composition and high pressure of deep sea water, this method is not only costly, but also not reliable.

Contents of the invention

Aiming at the low reliability of the electromagnetic triggering device of the existing deep-sea water collecting device, the present invention proposes a static pressure triggering device of the deep-sea water collecting device.

In order to achieve the above object, the technical solution adopted by the present invention is as follows: a static pressure trigger type deep sea water collection device, including a cover-type water collection tank and a static pressure trigger device; wherein, the cover-type water collection tank includes a Water collector bottle body and stay rope; Wherein, the two ends of described water collector bottle body are all hinged with water collector lid; Described two water collector lids are connected by the rubber cord that is arranged in the water collector bottle body; The middle part of the bottle body of the water collector is fixedly connected with a handle; one end of the bottle body of the water collector has a water outlet, and the other end has an air inlet, and the air inlet is sealed by plugging; one end of the stay rope Connected to the cover of the water collector;

The static pressure trigger device is installed on the side wall of the water collector bottle; the static pressure trigger device includes a lower support platform, a crush tank, a trigger lever, a spring, a spring cavity, and an upper support platform; the lower support There is a groove on the platform, and the crushing tank is installed on the groove; the lower end of the trigger rod is fixedly connected with the crushing tank; the trigger rod is passed through the spring cavity; the trigger rod and the spring Springs are arranged between the cavities; the upper support platform is arranged on the top of the spring cavity, and the upper end of the trigger lever is arranged on the through hole of the upper support platform; the lower support platform, the spring cavity and the upper support platform are all It is fixedly connected with the side wall of the bottle body of the water collector; one end of the pull rope is sleeved on the trigger lever between the spring cavity and the upper support platform.

Further, the trigger rod includes a polished rod; the polished rod is a long axis with a diameter of _d0 , and a boss is integrally formed on the polished rod; the boss is used to resist the spring; the bottom of the polished rod is integrally formed with a The end cover of the crushing tank with a thickness of _h1 ; the end cover of the crushing tank is provided with an annular groove with an outer diameter of _d1 , an inner diameter of _d0 and a depth of _h2 centering on the central axis of the polished rod; the crushing tank The tank is a hollow cylindrical container with an inner diameter of d ₂ ; then the following formula is satisfied, namely:

in, is the pressure on the ring groove, P ₀ is the water pressure at the operating point, k is the stiffness coefficient of the spring, x is the pre-compressed length of the spring, A is the bottom surface area of the ring groove, and σ is the pressure required to break the end cover of the tank. The maximum principal stress received; h=h ₁ -h ₂ is the remaining depth.

Further, both the crush tank and the trigger lever are made of aluminum alloy.

Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a material property of the metal material, and uses the yield limit of the material of the pressure vessel tank to realize static pressure crushing, thereby enabling effective According to the set depth, the water harvester is triggered by crushing; since the water harvester in the present invention is triggered by pure mechanical static pressure, since its structure does not involve electromagnetic aspects, the requirements for the sealing of the device are not high, which greatly reduces costs. At the same time, the trigger only depends on the material properties of the crush tank, with few influencing factors, relatively stable, and not easily disturbed by the external environment. Compared with the existing trigger types of water collectors, the pure mechanical static pressure trigger has simple structure, low cost, strong reliability and stability.

Description of drawings

Fig. 1 is the overall figure of water collector;

Fig. 2 is a structural schematic diagram of a static pressure trigger device;

Fig. 3 is an assembly drawing of a crush tank and a crush tank end cover;

Fig. 4 is a schematic structural view of the trigger lever;

In the figure, rubber rope 1, plug 2, handle 3, water collector bottle body 4, water collector cover 5, pull rope 6, static pressure trigger device 7, lower support platform 8, crush tank 9, trigger lever 10. Spring 11, spring cavity 12, upper support platform 13, polished rod 101, boss 102, crush tank end cover 103, ring groove 104.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Fig. 1, the present invention includes a cap-type water collecting tank and a static pressure trigger device 7; wherein, the cap-type water collecting tank includes a water collecting device bottle body 4 and a drawstring 6; wherein the water collecting Both ends of the device bottle body 4 are hinged with a water collector cover 5; the two water collector covers 5 are connected by a rubber rope 1 arranged in the water collector bottle body 4; The middle part is fixedly connected with a handle 3; one end of the water collection device bottle body 4 has a water outlet, and the other end has an air inlet, and the air inlet is sealed by pulling out the plug 2; one end of the stay rope 6 is connected with the water collection The device cover 5 is connected;

As shown in Figure 2-3, the static pressure trigger device 7 is installed on the side wall of the water collector bottle body 4; the static pressure trigger device 7 includes a lower support platform 8, a crush tank 9, a trigger lever 10, Spring 11, spring chamber 12, upper supporting platform 13; Have groove on the described lower supporting platform 8, described crush tank 9 is installed on the described groove; The lower end of described trigger lever 10 and crush tank 9 are fixedly connected by bolts; the trigger lever 10 is penetrated in the spring cavity 12; a spring 11 is arranged between the trigger lever 10 and the spring cavity 12; the upper supporting platform 13 is arranged on the upper part of the spring cavity 12 , the upper end of the trigger lever 10 is arranged on the through hole of the upper support platform 13; the lower support platform 8, the spring cavity 12 and the upper support platform 13 are all fixedly connected with the side wall of the water collector bottle body 4; One end of the stay cord 6 is sleeved on the trigger lever 10 between the spring cavity 12 and the upper support platform 13 .

As shown in Figure 4, the trigger lever includes a polished rod 101; the polished rod 101 is a long axis with a diameter of _d0 , and the polished rod 101 is integrally formed with a boss 102; the boss 102 is used to withstand the spring 11 The bottom of the polished rod 101 is integrally formed with a crush tank end cover 103 with a thickness _h1 ; the crush tank end cover 103 has an outer diameter of _d1 and an inner diameter of d0 centered on the central axis of the polished rod ₁₀₁ , an annular groove 104 with a depth of _h2 ; the crush tank 9 is a hollow cylindrical container with an inner diameter of _d2 ; the following formula is satisfied, namely:

in, is the pressure on the ring groove 104, P ₀ is the water pressure at the operating point, k is the stiffness coefficient of the spring 11, x is the pre-compressed length of the spring 11, A is the bottom surface area of the ring groove 104, and σ is the crushed pressure. The maximum principal stress suffered by the end cover 103 of the tank; h=h ₁ −h ₂ , which is the remaining depth.

Both the crush tank 9 and the trigger lever 10 are made of aluminum alloy.

The working process of the present invention is as follows: the water collector is dropped into the sea, and when the water collector dives to a predetermined depth, the peripheral static pressure reaches the limit of the crush tank 9, and the crush tank end cover 103 is crushed; Under the assistance of the trigger rod 10, the trigger rod 10 is pulled into the crush tank 9, and at the same time, the pull rope 6 on the trigger rod 9 falls off to realize the trigger; Finish.

The design steps of crushing tank 9 and trigger lever 10 are as follows:

(1) According to the specific sea conditions, determine the water extraction depth, and formulate the water extraction depth-pressure data;

(2) According to the mechanical properties of the material of the cylindrical container, obtain the Lamé solution of the stress component suffered when the wall of the tank 9 is crushed:

Wherein, d ₂ is the inner diameter of the crushing tank 9, and d ₃ is the outer diameter of the crushing tank 9, and then the average radius of the crushing tank 9 is p ₁ is the internal pressure of the crush tank 9, p ₂ is the external pressure of the crush tank 9; σ _θ is the normal normal stress on the crush tank 9, σ _r is the radial normal stress on the crush tank 9, Where σ _r and σ _θ satisfy the yield limit σ _s of the material;

Substitute _p1 and _p2 in the formula (1) into the depth-pressure data sequence obtained in step (1), and obtain the wall thickness of the crush tank 9 according to the third strength theory;

(3) according to the wall thickness of the crushed tank obtained in the step (2), set up the simulation model of the water collector of the present invention, utilize the model simulation to obtain the maximum principal stress value of the edge of the ring groove 104, and the data are as follows:

test group h(mm) d0(mm) d1(mm) d2(mm) σ/P test group h(mm) d0(mm) d1(mm) d2(mm) σ/P 1 4 8 20 20 2.204 twenty one 5 6 16 20 1.2913 2 3.5 8 20 20 3.2978 twenty two 5 7 16 20 1.0909 3 3 8 20 20 4.5807 twenty three 4.5 7 18 18 1.2187 4 4 7 20 20 2.2201 twenty four 3.5 7 18 18 2.5196 5 4 6 20 20 2.2576 25 3.5 6.4 16 18 2.821 6 3.2 6 18 18 3.3768 26 3.8 6.4 17 18 2.1854 7 3.2 6.6 16.8 17 2.7855 27 4.2 6 17 18 1.6663 8 3.2 6.6 16 17 2.7012 28 4 8 16 16 1.1126 9 3 6.6 18 19 4.3889 29 4 6 16 16 1.258 10 3 6.6 17 19 4.6667 30 3.7 6 14 16 1.657 11 4.8 6.6 17 19 1.2858 31 3.9 6 15 16 1.2569 12 4.8 6.4 17 20 1.507 32 4.4 6.6 15 16 1.121 13 5 6.2 17.6 20 1.2168 33 4.4 6.6 15 15 1.1202 14 5 6.8 18.4 19.6 1.2217 34 4.4 6 14 15 1.1305 15 4.6 6.8 18.2 19.6 1.4874 35 4.2 8 20 20 2.0151 16 4.6 6.2 18 19.2 1.4057 36 4.1 8 20 20 2.13065 17 3.4 6.2 18 19.8 4.0111 37 3.2 8 20 20 4.056 18 3.4 6.4 17.8 19.8 3.9197 38 3.2 8 20 20 3.5012 19 3.6 6.4 17.8 19 2.9749 39 3.2 8 20 20 3.6852 20 4.5 6 18 20 1.9685 40 3.2 8 20 20 4.2379

Using MATLAB to perform multi-parameter data curve fitting on the experimental data, the empirical formula of the dimensionless maximum principal stress of the ring groove 104 is obtained:

in, is the pressure on the ring groove 104, P ₀ is the water pressure at the operating point, k is the stiffness coefficient of the spring 11, x is the pre-compressed length of the spring 11, A is the bottom surface area of the ring groove 104, and σ is the pressure The maximum principal stress suffered by the end cover 103 of the broken tank; h is the remaining depth;

(4) According to steps (1)-step (3), design the crush tank 9 and the trigger lever 10 at different depths.

The present invention proposes a method relying on the material properties of the metal material, using the yield limit of the material of the pressure vessel to achieve static pressure crushing, so that the water harvester can be effectively triggered according to the set depth of crushing in actual operation, and the structure is simple , low cost and high reliability.

Claims (1)

1. A static pressure trigger type deep sea water sampler is characterized by comprising a clamping cover type water sampling tank and a static pressure trigger device (7); the clamping cover type water sampling tank comprises a water sampler body (4) and a pull rope (6); wherein, two ends of the water sampler body (4) are hinged with water sampler covers (5); the two water sampler covers (5) are connected through a rubber rope (1) arranged in the water sampler bottle body (4); the middle part of the water sampler body (4) is fixedly connected with a handle (3); a water outlet is formed in one end of the water sampler body (4), and an air inlet is formed in the other end of the water sampler body and is sealed through a plug (2); one end of the pull rope (6) is connected with the water sampler cover (5);

the static pressure trigger device (7) is arranged on the side wall of the water sampler body (4); the static pressure trigger device (7) comprises a lower support platform (8), a crushing tank (9), a trigger rod (10), a spring (11), a spring cavity (12) and an upper support platform (13); a groove is formed in the lower supporting platform (8), and the crushing tank (9) is mounted on the groove; the lower end of the trigger rod (10) is fixedly connected with the crushing tank (9); the trigger rod (10) is arranged in the spring cavity (12) in a penetrating mode; a spring (11) is arranged between the trigger rod (10) and the spring cavity (12); the upper supporting platform (13) is arranged at the upper part of the spring cavity (12), and the upper end of the trigger rod (10) is arranged on a through hole of the upper supporting platform (13); the lower supporting platform (8), the spring cavity (12) and the upper supporting platform (13) are fixedly connected with the side wall of the water sampler body (4); one end of the pull rope (6) is sleeved on the trigger rod (10) between the spring cavity (12) and the upper supporting platform (13);

the trigger lever comprises a polish rod (101); the polish rod (101) has a diameter d₀The polished rod (101) is integrally formed with a boss (102); the boss (102) is used for abutting against the spring (11); a crush can end (103) is integrally formed at the bottom of the polish rod (101); the crushing can end cover (103) is provided with an outer diameter d by taking the central shaft of the polish rod (101) as the center₁Inner diameter of d₀A ring groove (104) with a depth h; the crushing tank (9) is a hollow cylindrical container with the inner diameter d₂(ii) a The outer diameter d of the ring groove (104)₁Inner diameter d of the ring groove (104)₀Depth h of the ring groove (104) and inner diameter d of the crushing tank (9)₂The following formula is satisfied, namely:

wherein,is the pressure, P, to which the ring groove (104) is subjected₀Is the water pressure at the working point, k is the stiffness coefficient of the spring (11), x is the pre-compression length of the spring (11), and A is the bottom surface of the ring groove (104)Area, σ, is the maximum principal stress experienced by a can end (103) being crushed;

the crushing tank (9) and the trigger rod (10) are made of aluminum alloy.