CN106940259B - Pressure self-adaptive seabed sequence water sampler - Google Patents
Pressure self-adaptive seabed sequence water sampler Download PDFInfo
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- CN106940259B CN106940259B CN201710234481.6A CN201710234481A CN106940259B CN 106940259 B CN106940259 B CN 106940259B CN 201710234481 A CN201710234481 A CN 201710234481A CN 106940259 B CN106940259 B CN 106940259B
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- sliding cover
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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
Technical Field
The invention relates to the technical field of water sampling equipment, in particular to a pressure self-adaptive submarine serial water sampler.
Background
The ocean resources are rich, the importance is important, and the development and the utilization of the ocean are important work in a plurality of countries. The research on the ocean and the investigation on ocean resources are not needed for constructing the ocean country in China. The collection of deep sea water samples is important for exploration of ocean mineral resources, monitoring of ocean environments, collection of submarine organisms and investigation of submarine geology.
Because personnel dive and take the water sample, the cost is high, and work is loaded down with trivial details, the depth of diving is low grade shortcoming, and the researcher is directed to the development of the underwater collection equipment that can automatic control. The automatic water sampler generally comprises a water sampling cylinder and water sampler switches which are connected with the water sampling cylinder and control actions at different depths, and the mode of triggering the action response of the water sampler switches can be in the modes of triggering a hammer, triggering a pressure switch element or triggering a cable control according to different designs. The action principle is generally as follows: the water sampler is lowered to a preset depth, and the triggering device is started to seal the water sampler for collecting water. The deep sea environment is severe, the requirements on water collecting equipment are high, the water collecting equipment in China currently has some problems, such as single structure, the water collecting equipment is mostly placed under the openings at two ends, water samples are collected in a closed mode, the degree of automation is not high, the control is not strong, and the reliability is not satisfactory.
In order to solve the above problems, chinese patent publication No. CN103674616B discloses a gravity piston type water sampler, which includes a cylinder at the middle, an upper frame at the top of the cylinder, and a lower frame at the bottom of the cylinder; a piston is arranged in the cylinder barrel, and a water outlet with a valve is arranged at the bottom of the outer wall of the cylinder barrel; a water inlet is formed in the top wall of the cylinder barrel, a pull rod with the bottom end connected to the top of the piston is inserted into the water inlet, and a lock head is arranged at the top of the pull rod; the upper end and the lower end of the water inlet are both conical table-shaped openings, the lower end of the lock head and the connecting part of the pull rod and the piston are both provided with conical sealing tables, and the two conical sealing tables are respectively matched with the upper opening and the lower opening; the top of the upper frame is also provided with a release mechanism for clamping the lock head and releasing the lock head under the action of a hammer.
Although the water sampler has a simple structure, is convenient to operate, can ensure that water samples are not cross-polluted, after sampling, in the process of recovering the water sampler, the seawater in the water sampler is separated out of gas due to the pressure difference of the seawater, and the gas is easily leaked out of the water sampler, so that the authenticity of a seawater sample cannot be ensured.
The current water sampler rarely considers the problem of gas leakage of the water sampler, and also does not consider the problem of how to safely place the water sampler on the seabed when collecting the bottom water of the offshore bottom.
Disclosure of Invention
The invention provides a pressure self-adaptive submarine serial water sampler, which can dynamically adjust the pressure in a sampling cavity in the recovery process after the water sampler finishes sampling, so that the pressure inside and outside the sampling cavity is kept balanced, and the leakage of dissolved gas separated out by a seawater sample is prevented.
A pressure-adaptive seafloor sequence water sampler comprising a sampling device, the sampling device comprising:
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.
When the sampling device collects seawater, the water sampler is pulled up for recovery, the pressure of seawater outside the sampling device is gradually reduced, and when the pressure inside the sampling device is higher than the pressure of the seawater outside the sampling device, the balance piston can move in the sampling cavity to reduce the pressure inside the sampling cavity, so that the balance of the pressure inside and outside the sampling cavity is ensured, the leakage of dissolved gas separated out from a seawater sample can be effectively prevented, and the effectiveness of the components of the seawater sample is ensured.
Preferably, a sealing plug matched with the opening of the sampling cavity is arranged on the side, opposite to the sampling cavity, of the sliding cover, and the push rod is fixed on the sealing plug.
The sealing plug can effectively ensure the tightness of the sampling cavity, effectively isolate the seawater sample collected in the sampling cavity from the outside, and ensure the validity of the sample.
An O-shaped sealing ring is arranged on the sealing plug, and polytetrafluoroethylene is coated outside the O-shaped sealing ring.
Preferably, the triggering mechanism includes:
the electromagnetic push rod is fixed on the top cover;
and one end of the fixed steel rope is connected with the sliding cover, and the other end of the fixed steel rope is sleeved on the electromagnetic push rod.
The trigger mechanism has simple structure and reliable working performance, and can not generate false trigger or invalid trigger.
Preferably, the force application mechanism is a compression spring sleeved on the guide sliding rod between the top cover and the sliding cover.
Compared with the traditional pulling rope used as a force application mechanism, the compression spring has larger thrust and is more reliable.
Preferably, the sampling device further includes:
the self-locking device is arranged at the top of the sampling cavity and is used for locking the sliding cover.
After the sampling is finished, the self-locking device locks the sliding cover, so that the sampling cavity can be effectively sealed on one hand, and on the other hand, the sliding cover can be prevented from being separated from the sampling cavity under the action of external force after the sampling, so that sampling failure is caused. The arrangement of the self-locking device increases the reliability of the sampler.
Preferably, the pressure-adaptive sampler of the present invention further comprises a supporting device for carrying the sampling device, the supporting device comprising:
the central pillar comprises a top section and a bottom section, and the sampling device is fixed on the bottom section;
the sleeve is sleeved on the top section of the central support in a sliding manner;
the support legs are at least three and evenly distributed in the circumferential direction of the sleeve.
When the water sampler reaches the sea bottom, the supporting legs of the supporting device firstly contact the sea bottom, and the sleeve can move on the center support column, so that the center support column and the sampling device arranged at the bottom end of the center support column can continuously descend for a certain distance until the top end face of the sleeve contacts with the end cover at the top of the center support column, the process plays a role in buffering the sampling device, can play a good role in protecting the sampling device, and prevents the sampling device from being suddenly collided by irregular sea bottom.
Preferably, at least 3 sampling devices are uniformly distributed along the circumferential direction of the center pillar.
The sampling devices are arranged, so that the water sampler can take water samples at a plurality of different time point sequences.
Further preferably, the pressure-adaptive seafloor sequence sampler of the invention is also provided with a depth gauge.
The depth gauge can feed back the descending depth of the sampler in real time, so that water samples with different depths are collected.
Compared with the prior art, the invention has the beneficial effects that:
(1) The water sampler can adjust the pressure inside the sampling cavity by the movement of the balance piston in the sampling cavity, so that the balance of the pressure inside and outside the sampling cavity is ensured, the leakage of dissolved gas separated out from a seawater sample is prevented, and the effectiveness of the components of the seawater sample is ensured;
(2) The support device of the water sampler can play a role in buffering the sampling device and prevent the sampling device from being suddenly collided by irregular seafloor.
Drawings
FIG. 1 is a schematic diagram of a pressure-adaptive subsea sequence water sampler in an embodiment;
FIG. 2 is a schematic diagram of a sampling device;
FIG. 3 is a schematic diagram of a slider structure;
FIG. 4 is a schematic structural view of the self-locking device, wherein (1) is a front view and (2) is a back view;
FIG. 5 is a schematic diagram of the pressure-adaptive water sampler in a lowered or recovered state;
fig. 6 is a schematic view of the state when placed on the sea floor.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
As shown in fig. 1, the pressure-adaptive water sampler of the present embodiment includes 8 sampling devices 2 and a supporting device 1 for supporting the sampling devices 2.
The support device 1 comprises a central post 101, a sleeve 102 and 5 feet 103. The center pillar 101 is a stepped shaft divided into three sections, and becomes larger in diameter from top to bottom. The top end of the central pillar 101 is provided with an end cover, the end cover is provided with a hanging ring, and the hanging ring is connected with a rope and a cable for releasing the water sampler.
The first step shaft at the top end is sleeved with a sleeve 102, and the sleeve 102 can freely slide along the axial direction of the central strut 101 at the diameter of the end cover and the first shaft shoulder. The 5 legs 103 are fixed to the outer peripheral wall of the sleeve 102 and are uniformly distributed in the circumferential direction of the sleeve 102.
A first fixing plate 104 and a second fixing plate 105 are fixed on a third-stage stepped shaft at the bottom end of the center pillar 101 for mounting the sampling device 2. The 8 sampling devices 2 are respectively connected to two fixing plates (a first fixing plate 104 and a second fixing plate 105) through 4 studs, are placed in the vertical direction, and can be used for placing other devices such as a depth gauge.
The control switches of the 8 sampling devices 2 can be controlled by different controllers, and the water sampler can be controlled to take water samples at a plurality of different time points in 24 hours.
As shown in fig. 2, the sampling device 2 includes a sampling chamber 201, and the sampling chamber 201 is open at both ends and is internally provided with a balance piston 206.
The bottom end of the sampling cavity 201 is fixed with a bottom plate 202, the bottom end of the sampling cavity 201 is fixed with a top plate 203, a top cover 205 is fixedly connected with the top plate 203 through three guide slide bars 204, and the three guide slide bars 204 are uniformly distributed. Threads are formed at two ends of the three guide slide bars 204 and are connected with the top disk 203 and the top cover 205 through the threads.
The sliding cover 207 is provided with a guide hole matched with the guide slide bar 204, the sliding cover 207 is sleeved on the guide slide bar 204, and the sliding cover 207 can slide along the guide slide bar 204 between the top cover 205 and the top disc 203. As shown in fig. 3, a fixed ring is arranged on the side of the sliding cover 207 opposite to the top cover 205, a sealing plug 208 is arranged on the side opposite to the sampling cavity 201, the sealing plug 208 is matched with the sampling cavity 201, the sampling cavity 201 is sealed, a push rod 209 is fixed on the sealing plug 208 through threads, and the push rod 209 is used for pushing the balance piston 206 to slide towards the bottom end of the sampling cavity 201.
Sealing rings are arranged on the sealing plug 208 and the balance piston 206, and the sealing rings are O-shaped rings wrapped by polytetrafluoroethylene.
A compression spring 210 is sleeved on the guide slide bar 204 between the top cover 205 and the sliding cover 207 for pushing the sliding cover 207 towards 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 clamped at two ends of the compression spring 210.
The top cover 205 is provided with an electromagnetic push rod 211, one end of a fixed steel rope 212 is fixed on the fixed ring, and the other end is sleeved on the electromagnetic push rod 211.
The top plate 203 is provided with 3 self-locking devices 213, and the structure of the self-locking devices 213 is shown in fig. 4 (1) and (2). The self-locking device 213 mainly comprises 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 inclined surface of the buckle 2131, so as to push the buckle 2131 to retract into the self-locking device 213, and compress the spring 2131. When the slide cover 207 is all over the catch 2131, the catch 2131 is sprung back by the spring 2132 in a compressed state, trapping the slide cover 207 between the catch 2131 and the top plate 203 of the self-locking device 213. The back of the buckle 2131 is provided with a section of cylindrical rod, the upper part is provided with an oval small hole, and the buckle 2131 can be pulled by hooking the small hole to release the self-locking sliding cover 207.
The working process of the pressure-adaptive water sampler of the embodiment is as follows:
before the water sampler is lowered into the sea, a steel rope 212 tied on a fixed ring of the sliding cover 207 is sleeved on the electromagnetic push rod 211, the sliding cover 207 is pulled, the sliding cover 207 compresses a compression spring 210, and a balance piston 206 is placed at an orifice of the sampling cavity 201, which is close to one side of the push rod 21;
when the water sampler is lowered, the water sampler is lowered to the deep sea through the cable and the rope, and the bottom end surface of the sleeve 102 on the supporting device 2 contacts with the first-stage shaft shoulder on the central support 101 under the action of gravity, as shown in fig. 5;
in the lowering process, the depth gauge feeds back the lowering depth in real time;
when the water sampler reaches the sea bottom, the 5 support legs of the supporting device 2 firstly contact the sea bottom, and as the sleeve 102 can move on the shaft of the central support 101, the central support 101 and the sampling device 2 arranged at the bottom end of the central support 101 can continuously descend for a certain distance until the top end face of the sleeve 102 contacts the end cover, as shown in fig. 6, the sampling device 2 can be well protected, and the sampling device 2 is prevented from being suddenly collided by irregular sea bottom;
when sampling device 2 receives a signal from a control system or an operator, electromagnetic push rod 211 is energized, steel cable 212 is released from electromagnetic push rod 211, and compression spring 210 is also released from the compressed state. The compression spring 210 pushes the sliding cover 207 to slide to the sampling cavity 201 along the guide sliding rod 204, the push rod 209 on the sliding cover 207 pushes the balance piston 206 in the sampling cavity 201 to slide to the other side of the sampling cavity 201, meanwhile, in the sliding process of the balance piston 206, surface seawater is discharged from one side of the sampling cavity far away from the sliding cover 207, seawater with the current depth flows into the sampling cavity 201 from one side of the sampling cavity near the sliding cover 207, and the sampling device 2 collects the seawater with the current depth, so that the purity of a sample is effectively ensured. When the sliding cover 207 reaches the sampling cavity 201, a sealing plug 208 on the sliding cover 207 is plugged into an cavity opening of the sampling cavity to seal new seawater flowing into the sampling cavity, and when the sliding cover 207 passes through the buckle 2131 completely, the self-locking device 213 locks the sliding cover 207 to finish the sampling work of the sampler;
a distance remains between the balance piston 206 in the sampling chamber 201 and the chassis 202 for the balance piston 206 to move in order to balance the pressure during the recovery of the sampler. When the sampling device 2 collects seawater, the water sampler is pulled up for recovery, the pressure of the seawater outside the sampling device 2 is gradually reduced, and when the pressure inside the sampling device 2 is higher than the pressure of the seawater outside by a certain amount, the balance piston 206 is forced to move towards the top plate 202, so that the pressure inside the sampling cavity 201 is reduced, the balance of the pressure inside and outside the sampling cavity 201 is ensured, the problem of precipitation and leakage of the seawater gas of the sample is effectively prevented, and the effectiveness of the seawater components of the sample is ensured.
The foregoing embodiments have described the technical solutions and advantages of the present invention in detail, and it should be understood that the foregoing embodiments are merely illustrative of the present invention and are not intended to limit the invention, and any modifications, additions, substitutions and the like that fall within the principles of the present invention should be included in the scope of the invention.
Claims (6)
1. A pressure-adaptive seafloor sequence water sampler comprising a sampling device, wherein the sampling device comprises:
the sampling cavity is provided with openings at two ends, and comprises a bottom end fixed with a bottom plate and a top end fixed with a top plate;
the balance piston is arranged in the sampling cavity;
the top cover is connected with the top disc 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 used for pushing the balance piston to slide towards the bottom end of the sampling cavity is arranged on one side of the sliding cover opposite to the sampling cavity;
a sealing plug matched with the opening of the sampling cavity is arranged on one side of the sliding cover opposite to the sampling cavity, and the push rod is fixed on the sealing plug;
the triggering mechanism is used for fixing the sliding cover and releasing the sliding cover after receiving the release signal and comprises an electromagnetic push rod fixed on the top cover and a fixed steel rope used for connecting the sliding cover and the electromagnetic push rod;
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;
when the sampling work is completed, a distance is still reserved between the balance piston in the sampling cavity and the chassis.
2. The pressure-adaptive seafloor sequence water sampler of claim 1, wherein the force applying mechanism is a compression spring sleeved on a guide slide bar between the top cover and the sliding cover.
3. The pressure adaptive seafloor sequence water sampler of claim 1, wherein the sampling device further comprises:
the self-locking device is arranged at the top of the sampling cavity and is used for locking the sliding cover.
4. The pressure-adaptive seafloor sequence water sampler of claim 1, further comprising a support means for carrying the sampling means, the support means comprising:
the central pillar comprises a top section and a bottom section, and the sampling device is fixed on the bottom section;
the sleeve is sleeved on the top section of the central support in a sliding manner;
the support legs are at least three and evenly distributed in the circumferential direction of the sleeve.
5. The pressure-adaptive seafloor sequence water sampler of claim 4, wherein at least 3 sampling devices are uniformly distributed along the circumference of the central column.
6. The pressure-adaptive seafloor sequence water sampler of claim 1, further comprising a depth gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710234481.6A CN106940259B (en) | 2017-04-11 | 2017-04-11 | Pressure self-adaptive seabed sequence water sampler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710234481.6A CN106940259B (en) | 2017-04-11 | 2017-04-11 | Pressure self-adaptive seabed sequence water sampler |
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| CN106940259A CN106940259A (en) | 2017-07-11 |
| CN106940259B true CN106940259B (en) | 2023-08-18 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521473A (en) * | 2019-01-25 | 2019-03-26 | 青岛科技大学 | One kind being based on pressure compensated piston-type deep sea acoustic releaser |
| CN113063627B (en) * | 2021-04-06 | 2022-03-01 | 中国海洋大学 | Deep-sea-bottom boundary layer controllable sequence water sampling device and laying method |
| CN113532955B (en) * | 2021-09-17 | 2021-11-16 | 江苏永吉消防科技有限公司 | Deep water sampling device for water quality monitoring |
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