CN106940259B - A Pressure Adaptive Submarine Sequential Water Collector - Google Patents

Abstract

The invention discloses a pressure self-adaptive submarine sequence water sampler, which comprises a sampling device, wherein the sampling device comprises: a sampling cavity with two open ends; the balance piston is arranged in the sampling cavity; the top cover is connected with the top of the sampling cavity through a guide sliding rod; the sliding cover is arranged on the guide sliding rod between the sampling cavity and the top cover in a sliding manner and is used for sealing the sampling cavity, and a push rod for pushing the balance piston is arranged on one side of the sliding cover opposite to the sampling cavity; the trigger mechanism is arranged on the top cover and used for fixing the sliding cover and releasing the sliding cover after receiving a release signal; the force application mechanism is arranged between the top cover and the sliding cover and is used for pushing the sliding cover to the sampling cavity. The water sampler disclosed by the invention has the advantages that the pressure inside the sampling cavity is regulated through the balance piston, so that the balance of the pressure inside and outside the sampling cavity is ensured, and the precipitation of dissolved gas in a seawater sample is prevented; the supporting device plays a role in buffering the sampling device and prevents the seabed from colliding with the sampling device.

Description

A Pressure Adaptive Submarine Sequential Water Collector

technical field

The invention relates to the technical field of water harvesting equipment, in particular to a pressure-adaptive seabed sequential water harvester.

Background technique

Ocean resources are rich and important, and the development and utilization of oceans is the priority work of many countries. If our country wants to build a marine power, it is necessary to study the ocean and explore the marine resources. Collecting deep seawater samples is very important for exploring ocean mineral resources, monitoring marine environment, collecting seabed organisms and investigating seabed geological functions.

Due to the disadvantages of high cost, cumbersome work, and low diving depth for personnel to dive to collect water samples, researchers have devoted themselves to the development of underwater collection equipment that can be automatically controlled. The automatic water collector generally includes a water collector and a water collector switch connected to the water collector to control actions at different depths. According to different designs, the form of triggering the switch action of the water collector can be triggered by a hammer or a pressure switch element. or cable control trigger, etc. The action principle is generally as follows: the water collector is lowered to a predetermined depth, and the trigger device is activated to close the water collector that has completed water collection. The deep-sea environment is harsh, and the requirements for water harvesting equipment are high. my country's water harvesting equipment currently has some problems, such as a single structure, most of which are opened at both ends and lowered, and then closed to collect water samples. Reliability is less than satisfactory.

In order to solve the above problems, the Chinese patent document whose publication number is CN103674616B discloses a gravity piston type water collector, comprising a cylinder in the middle, an upper frame at the top of the cylinder and a lower frame at the bottom of the cylinder; A piston is provided inside, and a water outlet with a valve is provided at the bottom of the outer wall of the cylinder; a water inlet is provided on the top wall of the cylinder, and a tie rod whose bottom end is connected to the top of the piston is inserted in the water inlet. There is a lock head on the top of the pull rod; the upper and lower ends of the water inlet are open in the shape of a conical platform, and the lower end of the lock head and the connection between the pull rod and the piston are all equipped with a conical sealing platform. The platform cooperates with the upper opening and the lower opening respectively; on the top of the upper frame, there is also a release mechanism for locking the lock head and releasing the lock head under the action of a hammer.

Although the above-mentioned water collector is simple in structure, easy to operate, and can ensure that the water sample is not cross-contaminated, after sampling, in the process of recovering the water collector, due to the difference in seawater pressure, the seawater in the water collector will precipitate gas, and the gas will easily leak out. Outside the water collector, the authenticity of seawater samples cannot be guaranteed.

At present, the existing water collectors seldom consider the gas leakage of the water collectors, and at the same time, they do not consider the problem of how to safely place the water collectors on the seabed when collecting bottom water near the seabed.

Contents of the invention

The present invention provides a pressure-adaptive seabed sequential water collector, which can dynamically adjust the pressure inside the sampling chamber during the recovery process after the water collector finishes sampling, so as to keep the internal and external pressures of the sampling chamber in balance and prevent seawater samples from The precipitated dissolved gas leaks.

A pressure-adaptive seabed serial water collector, comprising a sampling device, the sampling device comprising:

The sampling chamber is open at both ends;

Balance piston, set in the sampling chamber;

The top cover is connected with the top of the sampling chamber through a guide slide bar;

The sliding cover is slidably arranged on the guide slide rod between the sampling chamber and the top cover, and is used to seal the sampling chamber. The side of the sliding cover opposite to the sampling chamber is provided with a pusher for pushing the balance piston. rod;

a trigger mechanism, arranged on the top cover, for fixing the slide cover and releasing the slide cover after receiving a release signal;

The force applying mechanism is arranged between the top cover and the slide cover, and is used to push the slide cover toward the sampling cavity.

After the sampling device collects seawater, the water collector is pulled up and recovered, and the pressure of the seawater outside the sampling device gradually decreases. When the internal pressure of the sampling device is higher than the external seawater pressure, the balance piston can move in the sampling chamber to reduce the pressure inside the sampling chamber The pressure can ensure the balance of pressure inside and outside the sampling chamber, which can effectively prevent the leakage of dissolved gas precipitated from seawater samples and ensure the effectiveness of seawater sample components.

Preferably, the side of the sliding cover opposite to the sampling cavity is provided with a sealing plug matching with the opening of the sampling cavity, and the push rod is fixed on the sealing plug.

The sealing plug can effectively ensure the sealing of the sampling chamber, ensure the effective isolation of the seawater sample collected in the sampling chamber from the outside, and ensure the validity of the sample.

An O-shaped sealing ring is installed on the sealing plug, and the O-shaped sealing ring is covered with polytetrafluoroethylene.

Preferably, the trigger mechanism includes:

An electromagnetic push rod is fixed on the top cover;

The steel rope is fixed, one end is connected with the sliding cover, and the other end is sleeved on the electromagnetic push rod.

The trigger mechanism has simple structure, reliable working performance and no false trigger or invalid trigger.

Preferably, the force applying mechanism is a compression spring sleeved on a guide slide bar between the top cover and the slide cover.

Compared with the traditional pull cord as the force application mechanism, the pushing force of the compression spring is larger and more reliable.

As preferably, the sampling device also includes:

A self-locking device is installed on the top of the sampling chamber and is used to lock the sliding cover.

After sampling, the self-locking device locks the sliding cover, which can effectively seal the sampling chamber on the one hand, and prevent the sliding cover from falling out of the sampling chamber under the action of external force after sampling, resulting in sampling failure. The setting of the self-locking device increases the reliability of the sampler.

Preferably, the pressure-adaptive sampler of the present invention further includes a supporting device for carrying the sampling device, and the supporting device includes:

The central pillar includes a top section and a bottom section, and the sampling device is fixed on the bottom section;

The sleeve is slidingly sleeved on the top section of the central pillar;

There are at least three legs, which are evenly distributed on the circumference of the sleeve.

When the water sampling device reaches the bottom of the sea, the legs of the supporting device first touch the bottom of the sea. Since the sleeve can move on the center pillar, the center pillar and the sampling device installed at the bottom of the center pillar will continue to descend for a certain distance until the top of the sleeve The end surface touches the end cover on the top of the central pillar, and this process acts as a buffer for the sampling device, which can protect the sampling device and prevent sudden collisions on the sampling device from the irregular seabed.

Preferably, there are at least three sampling devices, which are evenly distributed along the circumference of the central pillar.

Setting up multiple sampling devices can realize the sequential collection of water samples by the water collector at multiple different time points.

Further preferably, the pressure-adaptive seabed serial sampler of the present invention is also provided with a depth gauge.

The depth gauge can feed back the lowering depth of the sampler in real time to realize the collection of water samples at different depths.

Compared with prior art, the beneficial effect of the present invention is:

(1) The water collector of the present invention can adjust the pressure inside the sampling chamber by moving the balance piston in the sampling chamber, so as to ensure that the internal and external pressures of the sampling chamber are balanced, prevent the leakage of the dissolved gas precipitated in the seawater sample, and ensure that the seawater sample the effectiveness of the ingredients;

(2) The support device of the water sampling device of the present invention can buffer the sampling device and prevent the irregular sea bottom from suddenly colliding with the sampling device.

Description of drawings

Fig. 1 is the structural representation of the subsea sequence water harvester of pressure self-adaptation in the embodiment;

Fig. 2 is the structural representation of sampling device;

Fig. 3 is the structural schematic diagram of sliding cover;

Fig. 4 is a structural schematic diagram of the self-locking device, wherein (1) is a front view, and (2) is a rear view;

Fig. 5 is a schematic diagram of the state when the pressure-adaptive water collector is lowered or recovered;

Fig. 6 is a schematic diagram of the state when it is placed on the seabed.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 1 , the pressure-adaptive water collector of this embodiment includes eight sampling devices 2 and a support device 1 for supporting the sampling devices 2 .

The supporting device 1 includes a central pillar 101 , a sleeve 102 and five legs 103 . The central pillar 101 is a stepped shaft divided into three sections, and its diameter becomes larger from top to bottom. The top of the central pillar 101 is provided with an end cover, and the end cover is provided with a suspension ring, and the suspension ring is connected with the rope and the cable for releasing the water collector.

A sleeve 102 is sleeved on the first step shaft at the top, and the sleeve 102 can freely slide on the end cover and the first shaft shoulder diameter along the axial direction of the central pillar 101 . Five legs 103 are fixed on the outer peripheral wall of the sleeve 102 and are evenly distributed along the circumference of the sleeve 102 .

A first fixed plate 104 and a second fixed plate 105 are fixed on the third step shaft at the bottom end of the central pillar 101 for installing the sampling device 2. Each of the eight sampling devices 2 is connected to the two fixed plates by four stud bolts On (the first fixed plate 104 and the second fixed plate 105), it is placed in a vertical direction, and other equipment such as a depth gauge can also be placed on the fixed plate.

The control switches of the eight sampling devices 2 can be controlled by different controllers, and through the control, the water sampling device can sequentially collect water samples at multiple different time points in 24 hours.

As shown in FIG. 2 , the sampling device 2 includes a sampling chamber 201 with openings at both ends and a balance piston 206 inside.

The bottom of the sampling chamber 201 is fixed with a bottom plate 202 , the bottom of the sampling chamber 201 is fixed with a top plate 203 , and the top cover 205 is fixedly connected with the top plate 203 through three guide rods 204 , and the three guide rods 204 are evenly distributed. The two ends of the three guide slide rods 204 are processed with threads, and are connected with the top plate 203 and the top cover 205 by threads.

The slide cover 207 is provided with a guide hole matched with the guide slide bar 204 , the slide cover 207 is threaded on the guide slide bar 204 , and can slide along the guide slide bar 204 between the top cover 205 and the top plate 203 . As shown in Figure 3, the side opposite to the top cover 205 of the sliding cover 207 is provided with a fixed ring, and the side opposite to the sampling chamber 201 is provided with a sealing plug 208, and the sealing plug 208 cooperates with the sampling chamber 201 and seals the sampling chamber 201 , the push rod 209 is fixed on the sealing plug 208 through threads, and the push rod 209 is used to push the balance piston 206 to slide toward the bottom of the sampling chamber 201 .

Both the sealing plug 208 and the balancing piston 206 are provided with sealing rings, and the sealing rings are O-rings wrapped by polytetrafluoroethylene.

The guide slide bar 204 between the top cover 205 and the slide cover 207 is covered with a compression spring 210 for pushing the slide cover 207 to the sampling cavity 201 . The bottom surface of the top cover 205 and the top surface of the sliding cover 207 are respectively provided with protrusions, and the protrusions are like two ends of the compression spring 210 .

An electromagnetic push rod 211 is installed on the top cover 205 , one end of the fixed steel rope 212 is fixed on the fixed ring, and the other end is sleeved on the electromagnetic push rod 211 .

Three self-locking devices 213 are arranged on the top plate 203, and the structures of the self-locking devices 213 are shown in Fig. 4 (1) and (2). The self-locking device 213 is mainly composed of a spring 2132 and a buckle 2131. When the sliding cover 207 is pushed by the compression spring 210 to reach the self-locking device 213, the sliding cover 207 touches the slope of the buckle 2131, pushing the buckle 2131 to retract to Inside the self-locking device 213, the spring 2131 is compressed. When the sliding cover 207 completely passes over the buckle 2131 , the buckle 2131 is rebounded and ejected by the spring 2132 in a compressed state, and the sliding cover 207 is stuck between the buckle 2131 of the self-locking device 213 and the top plate 203 . Buckle 2131 rear portion has a section of cylindrical rod, and there is an oval small hole in the top, can pull buckle 2131 by hooking the small hole, releases the slide cover 207 that is self-locked.

The working process of the pressure-adaptive water collector of the present embodiment is as follows:

Before lowering the water collector into the sea, put the steel rope 212 tied on the fixed ring of the slide cover 207 on the electromagnetic push rod 211, pull the slide cover 207, and the slide cover 207 compresses the compression spring 210, and the balance piston 206 is placed The mouth of the sampling chamber 201 near the side of the push rod 21;

When the water collector is lowered, the water collector is lowered to the deep sea through cables and ropes. Due to gravity, the bottom end surface of the sleeve 102 on the support device 2 contacts the first-stage shoulder on the central pillar 101, as shown in Figure 5;

During the lowering process, the depth gauge immediately feeds back the lowering depth;

When the water sampling device reaches the seabed, the 5 legs of the supporting device 2 contact the seabed at first, because the sleeve 102 can move on the axis of the central pillar 101, so the central pillar 101 and the sampling device 2 installed at the bottom of the central pillar 101 will meet Continue to descend for a certain distance until the top end surface of the sleeve 102 touches the end cap, as shown in Figure 6, which can protect the sampling device 2 well and prevent the irregular sea bottom from suddenly colliding with the sampling device 2;

When the sampling device 2 receives a signal from the control system or the operator, the electromagnetic push rod 211 is energized to act, and the steel rope 212 sleeved on the electromagnetic push rod 211 is released, and the compression spring 210, which is also in a compressed state, is also released at this time. freed. The compression spring 210 pushes the slide cover 207 to slide toward the sampling chamber 201 along the guide slide rod 204, and the push rod 209 on the slide cover 207 pushes the balance piston 206 in the sampling chamber 201 to slide to the other side of the sampling chamber 201, while During the sliding process of the balance piston 206, the surface seawater is discharged from the side of the sampling chamber away from the sliding cover 207, and the seawater of the current depth flows into the sampling chamber 201 from the side of the sampling chamber close to the sliding cover 207, and the sampling device 2 collects Seawater that exceeds the current water depth effectively guarantees the purity of the sample. When the slide cover 207 arrived at the sampling chamber 201, the sealing plug 208 on the slide cover 207 was inserted into the mouth of the sampling chamber to seal the new seawater flowing into the sampling chamber. Lock the slide cover 207 to complete the sampling work of the sampler;

There is still a distance between the balance piston 206 in the sampling chamber 201 and the chassis 202, which is used for the balance piston 206 to move to balance the pressure during the recovery process of the sampler. After the sampling device 2 collects seawater, the water collector is pulled up and recovered, and the pressure of the seawater outside the sampling device 2 gradually decreases. When the internal pressure of the sampling device 2 is higher than the external seawater pressure by a certain amount, the balance piston 206 is forced to the top. The disk 202 moves to reduce the internal pressure of the sampling chamber 201 to ensure that the internal and external pressures of the sampling chamber 201 are balanced, effectively preventing the leakage of the sample seawater gas and ensuring the validity of the sample seawater components.

The embodiments described above have described the technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. All within the scope of the principles of the present invention Any modifications, supplements and equivalent replacements should be included within the protection scope of the present invention.

Claims (6)

1. A pressure-adaptive seabed sequence water collector, comprising sampling device, is characterized in that, described sampling device comprises: The sampling chamber is open at both ends, including a bottom end fixed with a bottom plate and a top end fixed with a top plate; Balance piston, set in the sampling chamber; The top cover is connected with the top plate of the sampling chamber through a guide slide bar; The sliding cover is slidably arranged on the guide slide rod between the sampling chamber and the top cover, and is used to seal the sampling chamber. The side of the sliding cover opposite to the sampling chamber is provided with a function for pushing the balance piston toward the sampling chamber. A push rod that slides at the bottom of the cavity; The side of the sliding cover opposite to the sampling chamber is provided with a sealing plug matching the opening of the sampling chamber, and the push rod is fixed on the sealing plug; The trigger mechanism is used to fix the slide cover and release the slide cover after receiving a release signal, including an electromagnetic push rod fixed on the top cover, and a fixed steel rope for connecting the slide cover and the electromagnetic push rod; a force applying mechanism, arranged between the top cover and the slide cover, for pushing the slide cover toward the sampling cavity; When the sampling work is completed, there is still a certain distance between the balance piston in the sampling chamber and the chassis. 2 . The pressure-adaptive seabed sequential water harvester according to claim 1 , characterized in that, the force applying mechanism is a compression spring sleeved on a guide slide rod between the top cover and the slide cover. 3 . 3. the pressure-adaptive seabed sequence water sampling device according to claim 1, is characterized in that, described sampling device also comprises: A self-locking device is installed on the top of the sampling chamber and is used to lock the sliding cover. 4. The pressure-adaptive seabed serial water sampling device according to claim 1, is characterized in that, also comprises the support device that is used to carry described sampling device, and described support device comprises: The central pillar includes a top section and a bottom section, and the sampling device is fixed on the bottom section; The sleeve is slidingly sleeved on the top section of the central pillar; There are at least three legs, which are evenly distributed on the circumference of the sleeve. 5. The pressure-adaptive seabed serial water sampling device according to claim 4, characterized in that there are at least three said sampling devices, which are evenly distributed along the circumference of the central pillar. 6. The pressure-adaptive seabed serial water sampling device according to claim 1, characterized in that, a depth gauge is also provided.