Osmotic pump sampler

Abstract

The invention discloses an osmotic pump sampler, and relates to the technical field of underwater samplers, an upper end cover and a lower end cover are respectively arranged at the upper end and the lower end of a cylinder body, a drainage pipe is arranged at the upper part of the upper end cover and is communicated with the cylinder body, and a water sample storage coil pipe is arranged at the lower part of the lower end cover and is communicated with the cylinder body; the rotary driving part is arranged on the lower portion of the upper end cover, a power output shaft of the rotary driving part is in threaded connection with the connecting frame, the lower portion of the connecting frame is connected with a piston, and the piston is attached to the inner wall of the barrel and can move up and down relative to the barrel; the piston is provided with a limiting through hole and a plurality of mounting through holes, the lower end of the sliding rod is arranged on the upper portion of the lower end cover, the upper end of the sliding rod penetrates through the limiting through hole and extends to the position above the piston, a plurality of permeable membranes are arranged on the lower portion of the piston, and each permeable membrane corresponds to one mounting through hole in position. According to the osmotic pump sampler, rapid collection of samples is realized, and the problems of low sampling speed and limited application scenarios are solved.

Description

Technical Field

[0001] The invention relates to the technical field of underwater samplers, in particular to an osmotic pump sampler. Background Art

[0002] An underwater sampler is a device that collects samples from water bodies such as oceans, lakes, rivers, and groundwater. It is widely used in environmental science, oceanography, hydrogeology, and pollution monitoring, providing scientists with a key tool for collecting and analyzing water data. An osmotic pump sampler is a new type of sampler that uses the osmotic pressure of the solution as the sampling power, which can achieve long-term continuous collection of samples in the water environment.

[0003] The core component of the osmotic pump sampler is the osmotic pump, which is mainly composed of an osmotic membrane and solvents with different ion densities on both sides of the osmotic membrane. When there is an osmotic pressure difference between the solutions on both sides of the osmotic membrane, the solvent molecules will flow from the low concentration side to the high solubility side, driving the overall flow of the fluid inside the sampler and absorbing external samples. In the actual use of the osmotic pump sampler, the solvent of the osmotic pump solution is mainly deionized water, and the solute is sodium chloride. Therefore, the solutions on both sides of the osmotic membrane of the osmotic pump sampler are sodium chloride solution and deionized water respectively. Driven by the osmotic pressure, the water molecules of the deionized water will pass through the osmotic membrane into the sodium chloride solution, thereby absorbing external samples into the sampler.

[0004] However, the efficiency of deionized water entering the sodium chloride solution through the osmotic membrane is low, resulting in a low sampling flow rate for the osmotic pump sampler, which is only suitable for slow and long-term sampling working environments. When rapid sampling of the water environment is required, the osmotic pump sampler is very limited, that is, the osmotic pump sampler has the problem of slow sampling speed and limited application scenarios. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an osmotic pump sampler, which realizes the rapid collection of samples and solves the problems of slow sampling speed and limited application scenarios.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides an osmotic pump sampler, comprising a drain pipe, a water sample storage coil and an osmotic pump, wherein the osmotic pump comprises a barrel, an upper end cover, a lower end cover, a rotary drive component, a connecting frame, a piston and a sliding rod, wherein the upper end cover and the lower end cover are respectively arranged at the upper and lower ends of the barrel, the drain pipe is arranged at the upper part of the upper end cover and is connected to the barrel, the water sample storage coil is arranged at the lower part of the lower end cover and is connected to the barrel; the rotary drive component is arranged at the lower part of the upper end cover, and the power output shaft of the rotary drive component An external thread is provided on it, the power output shaft of the rotating drive component is threadedly connected to the connecting frame, the lower part of the connecting frame is connected to the piston, the piston fits against the inner wall of the cylinder and can move up and down relative to the cylinder; a limiting through hole and a plurality of mounting through holes are provided on the piston, the lower end of the slide rod is provided on the upper part of the lower end cover, the upper end of the slide rod passes through the limiting through hole and extends to above the piston, and a plurality of permeable membranes are provided at the lower part of the piston, each of the permeable membranes corresponds to a position of the mounting through hole.

[0008] Preferably, the drain pipes are provided in plurality, the upper end cover is provided with a plurality of upper threaded holes, and each of the drain pipes is threadedly connected to one of the upper threaded holes.

[0009] Preferably, the osmotic pump also includes a plurality of upper bolts, the upper end cover includes an upper cover plate and an upper cylinder arranged at the lower part of the upper cover plate, each of the upper threaded holes passes through the upper cover plate and the upper cylinder, and the rotation driving component is arranged at the lower part of the upper cylinder; a first annular groove is arranged on the outside of the upper cylinder, a first sealing ring is installed in the first annular groove, the upper cylinder is arranged at the upper part of the cylinder, the first sealing ring is fitted with the inner wall of the cylinder, a plurality of upper mounting holes are arranged on the upper cover plate along the circumferential direction, each of the upper bolts passes through one of the upper mounting holes and is threadedly installed on the upper end surface of the cylinder.

[0010] Preferably, a lower threaded hole is provided on the lower end cover, and the upper end of the water sample storage coil is threadedly connected to the lower threaded hole.

[0011] Preferably, the osmotic pump also includes a plurality of lower bolts, the lower end cover includes a lower cover plate and a lower cylinder arranged at the upper part of the lower cover plate, each of the lower threaded holes passes through the lower cover plate and the lower cylinder, and the lower end of the slide rod is arranged at the upper part of the lower cylinder; a second annular groove is arranged on the outside of the lower cylinder, a second sealing ring is installed in the second annular groove, the lower cylinder is arranged at the lower part of the cylinder, the second sealing ring is fitted with the inner wall of the cylinder, and a plurality of lower mounting holes are arranged on the lower cover plate along the circumferential direction, and each of the lower bolts passes through one of the lower mounting holes and is threadedly installed on the lower end surface of the cylinder.

[0012] Preferably, the piston includes a moving block and a third sealing ring, a third annular groove is provided on the outside of the moving block, the third sealing ring is installed in the third annular groove and fits with the inner wall of the cylinder; the connecting frame is arranged on the upper part of the moving block, and the moving block is provided with the limiting through hole and multiple installation through holes.

[0013] Preferably, the connecting frame includes a horizontal plate, two connecting plates, two fixed plates and two fixed components, the two connecting plates are respectively arranged at the lower ends of both sides of the horizontal plate, a fixed plate is arranged at the lower end of each connecting plate, each fixed component fixes one fixed plate to the moving block, a connecting threaded hole is arranged in the middle of the horizontal plate, and the power output shaft of the rotating drive component is installed in the connecting threaded hole.

[0014] Preferably, the fixing component is a fixing bolt, the fixing plate is provided with a fixing through hole, the moving block is provided with two fixing threaded holes, and each of the fixing bolts passes through one of the fixing through holes and is installed in one of the fixing threaded holes.

[0015] Preferably, the permeable membrane is a capsule-shaped structure with an open upper end and a closed lower end, a plurality of mounting cylinders are provided on the lower surface of the moving block, each mounting cylinder corresponds to a mounting through hole position, and the upper end of each permeable membrane is fixedly mounted on one mounting cylinder.

[0016] Preferably, the rotary drive component is a waterproof motor.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] The piston of the osmotic pump sampler of the present invention separates the cylinder into a salt solution chamber and a deionized water chamber. In the initial state, the salt solution chamber and the drain pipe are filled with a supersaturated sodium chloride solution, and the deionized water chamber and the water sample storage coil are filled with deionized water. During sampling, under the action of osmotic pressure, deionized water will pass through the osmotic membrane into the sodium chloride solution, thereby sucking in and storing the external sample in the water sample storage coil. At the same time, part of the sodium chloride solution will flow out of the osmotic pump and enter the drain pipe. When rapid sampling is required, the power output shaft of the rotating drive component rotates to drive the piston to move upward, and the sample is quickly sucked into the water sample storage coil, enabling the sampler to quickly collect the sample, solving the problems of slow sampling speed and limited application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of the osmotic pump sampler provided by the present invention;

[0021] Figure 2 A schematic diagram of the internal structure of an osmotic pump in an osmotic pump sampler provided by the present invention;

[0022] Figure 3 A schematic diagram of the structure of the upper end cover of the osmotic pump sampler provided by the present invention;

[0023] Figure 4 A schematic diagram of the structure of the lower end cover of the osmotic pump sampler provided by the present invention;

[0024] Figure 5 A schematic diagram of the structure of a piston, a connecting frame and an osmotic membrane in an osmotic pump sampler provided by the present invention;

[0025] Figure 6 A schematic diagram of the structure of a piston in an osmotic pump sampler provided by the present invention;

[0026] Figure 7 This is a schematic structural diagram of a connecting frame in the osmotic pump sampler provided by the present invention.

[0027] Explanation of the accompanying drawings: 100, osmotic pump sampler; 1, drain pipe; 2, water sample storage coil; 3, cylinder; 4, upper end cover; 41, upper cover plate; 42, upper column; 43, first sealing ring; 44, upper threaded hole; 45, upper mounting hole; 5, lower end cover; 51, lower cover plate; 52, lower column; 53, second sealing ring; 54, lower threaded hole; 55, lower mounting hole; 6, rotating drive component; 7, connecting frame; 71, horizontal plate; 72, connecting threaded hole; 73, connecting plate; 74, fixing plate; 75, fixing through hole; 8, moving block; 9, third sealing ring; 10, osmotic membrane; 11, sliding rod; 12, fixing bolt; 13, mounting through hole; 14, limiting through hole; 15, mounting cylinder; 16, external thread; 17, upper bolt; 18, lower bolt. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The purpose of the present invention is to provide an osmotic pump sampler, which realizes the rapid collection of samples and solves the problems of slow sampling speed and limited application scenarios.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1-Figure 7 As shown, this embodiment provides an osmotic pump sampler 100, including a drain pipe 1, a water sample storage coil 2 and an osmotic pump, the osmotic pump including a cylinder 3, an upper end cover 4, a lower end cover 5, a rotating drive component 6, a connecting frame 7, a piston and a sliding rod 11, the upper end cover 4 and the lower end cover 5 are respectively arranged at the upper and lower ends of the cylinder 3, the drain pipe 1 is arranged at the upper part of the upper end cover 4 and is connected to the cylinder 3, the drain pipe 1 is used to discharge the solution preset in the osmotic pump, and the end of the drain pipe 1 away from the upper end cover 4 can be connected to a storage bag or directly lead to the external environment; the water sample storage coil 2 is arranged at the lower part of the lower end cover 5 and is connected to the cylinder 3, and the water sample storage coil 2 is used to absorb and store samples.

[0032] The rotary drive component 6 is arranged at the lower part of the upper end cover 4, and an external thread 16 is arranged on the power output shaft of the rotary drive component 6. The power output shaft of the rotary drive component 6 is threadedly connected to the connecting frame 7. The lower part of the connecting frame 7 is connected to a piston, and the piston fits the inner wall of the cylinder 3 and can move up and down relative to the cylinder 3; a limited through hole 14 and a plurality of mounting through holes 13 are arranged on the piston, and the lower end of the slide rod 11 is arranged at the upper part of the lower end cover 5. The upper end of the slide rod 11 passes through the limited through hole 14 and extends to the top of the piston. A plurality of permeable membranes 10 are arranged at the lower part of the piston, and each permeable membrane 10 corresponds to a mounting through hole 13. The circumferential movement of the piston is limited by setting the slide rod 11. When the power output shaft of the rotary drive component 6 rotates, the connecting frame 7 and the piston can move up and down relative to the cylinder 3.

[0033] In this embodiment, a salt solution chamber is formed between the piston and the upper end cover 4, and a deionized water chamber is formed between the piston and the lower end cover 5, that is, the piston separates the cylinder 3 into a salt solution chamber and a deionized water chamber, and water molecules in the salt solution chamber and the deionized water chamber can interact through the permeable membrane 10 on the piston.

[0034] In the initial state, the salt solution chamber and the drain pipe 1 are filled with supersaturated sodium chloride solution, and the deionized water chamber and the water sample storage coil 2 are filled with deionized water. During sampling, under the action of osmotic pressure, deionized water will pass through the osmotic membrane 10 into the sodium chloride solution, thereby sucking in and storing the external sample in the water sample storage coil 2. At the same time, part of the sodium chloride solution will flow out of the osmotic pump and enter the drain pipe 1. When fast sampling is required, the power output shaft of the rotary drive component 6 rotates to drive the piston to move upward, and the sample is quickly sucked into the water sample storage coil 2, enabling the sampler to quickly collect the sample, solving the problems of slow sampling speed and limited application scenarios.

[0035] The osmotic pump sampler 100 in this embodiment can use the osmotic pressure of the salt solution chamber and the deionized water chamber as power to drive the water sample storage coil 2 to absorb the sample, and can also quickly suck the sample into the water sample storage coil 2 by moving the piston, which greatly improves the sampling rate of the sampler and has a wider range of applications.

[0036] Specifically, a plurality of drain pipes 1 are provided, and a plurality of upper threaded holes 44 are provided on the upper end cover 4. Each drain pipe 1 is threadedly connected to an upper threaded hole 44, thereby making it easy to disassemble and assemble the drain pipes 1.

[0037] In this specific embodiment, two drain pipes 1 are provided.

[0038] The osmotic pump also includes a plurality of upper bolts 17, such as Figure 3 As shown, the upper end cover 4 includes an upper cover plate 41 and an upper cylinder 42 arranged at the lower part of the upper cover plate 41, each upper threaded hole 44 penetrates the upper cover plate 41 and the upper cylinder 42, and the rotation drive component 6 is arranged at the lower part of the upper cylinder 42; a first annular groove is arranged on the outside of the upper cylinder 42, and a first sealing ring 43 is installed in the first annular groove, the upper cylinder 42 is arranged at the upper part of the cylinder 3, and the first sealing ring 43 fits with the inner wall of the cylinder 3. A plurality of upper mounting holes 45 are circumferentially arranged on the upper cover plate 41, and each upper bolt 17 passes through an upper mounting hole 45 and is threadedly installed on the upper end surface of the cylinder 3, thereby fixing the upper end cover 4 on the cylinder 3 and ensuring the sealing between the upper end cover 4 and the cylinder 3, so that the solution only flows out through the drain pipe 1.

[0039] Specifically, the lower end cover 5 is provided with a lower threaded hole 54, and the upper end of the water sample storage coil 2 is threadedly connected to the lower threaded hole 54, thereby making it easy to disassemble and assemble the water sample storage coil 2. The water sample storage coil 2 in this embodiment is a multi-layer spiral pipe.

[0040] The osmotic pump also includes a plurality of lower bolts 18, such as Figure 4As shown, the lower end cover 5 includes a lower cover plate 51 and a lower cylinder 52 arranged on the upper part of the lower cover plate 51, each lower threaded hole 54 penetrates the lower cover plate 51 and the lower cylinder 52, and the lower end of the slide rod 11 is arranged on the upper part of the lower cylinder 52; a second annular groove is arranged on the outside of the lower cylinder 52, and a second sealing ring 53 is installed in the second annular groove, the lower cylinder 52 is arranged in the lower part of the cylinder 3, and the second sealing ring 53 fits with the inner wall of the cylinder 3, and a plurality of lower mounting holes 55 are circumferentially arranged on the lower cover plate 51, and each lower bolt 18 passes through a lower mounting hole 55 and is threadedly installed on the lower end surface of the cylinder 3, thereby fixing the lower end cover 5 on the cylinder 3 and ensuring the sealing between the lower end cover 5 and the cylinder 3, so that the sample can only enter the cylinder 3 through the water sample storage coil 2.

[0041] like Figure 6 As shown, the piston includes a moving block 8 and a third sealing ring 9. The outside of the moving block 8 is provided with a third annular groove. The third sealing ring 9 is installed in the third annular groove and fits with the inner wall of the cylinder 3, so that the piston divides the cylinder 3 into a salt solution chamber and a deionized water chamber, so that the solutions on both sides of the piston can only interact through the permeable membrane 10. The connecting frame 7 is arranged on the upper part of the moving block 8, and the moving block 8 is provided with a limited through hole 14 and a plurality of mounting through holes 13.

[0042] In this specific embodiment, the barrel 3 is cylindrical, the moving block 8 is cylindrical, the upper cover plate 41 and the lower cover plate 51 are both circular plates, and the upper column 42 and the lower column 52 are both cylindrical.

[0043] like Figure 7 As shown, the connecting frame 7 includes a horizontal plate 71, two connecting plates 73, two fixed plates 74 and two fixed components. The two connecting plates 73 are respectively arranged at the lower ends of both sides of the horizontal plate 71. A fixed plate 74 is arranged at the lower end of each connecting plate 73. Each fixed component fixes a fixed plate 74 to the moving block 8. A connecting threaded hole 72 is arranged in the middle of the horizontal plate 71, and the power output shaft of the rotating drive component 6 is installed in the connecting threaded hole 72.

[0044] The fixing component in this embodiment is a fixing bolt 12, a fixing through hole 75 is provided on the fixing plate 74, and two fixing threaded holes are provided on the moving block 8. Each fixing bolt 12 passes through a fixing through hole 75 and is installed in a fixing threaded hole, thereby fixing the connecting frame 7 on the moving block 8.

[0045] like Figure 5 and Figure 6 As shown, the permeable membrane 10 is a capsule-shaped structure with an open upper end and a closed lower end. A plurality of mounting cylinders 15 are provided on the lower surface of the moving block 8. Each mounting cylinder 15 corresponds to a mounting through hole 13. The upper end of each permeable membrane 10 is fixedly sleeved on a mounting cylinder 15. The permeable membrane 10 in this embodiment is bonded to the mounting cylinder 15.

[0046] In this specific implementation, the rotary drive component 6 is a waterproof motor. The housing of the waterproof motor is fixed to the upper column 42 by screws, and an external thread 16 is provided on the power output shaft of the waterproof motor.

[0047] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An osmotic pump sampler, characterized in that: The invention comprises a drain pipe, a water sample storage coil and an osmotic pump, wherein the osmotic pump comprises a cylinder, an upper end cover, a lower end cover, a rotary drive component, a connecting frame, a piston and a sliding rod, wherein the upper end cover and the lower end cover are respectively arranged at the upper and lower ends of the cylinder, the drain pipe is arranged at the upper part of the upper end cover and is connected to the cylinder, the water sample storage coil is arranged at the lower part of the lower end cover and is connected to the cylinder; the rotary drive component is arranged at the lower part of the upper end cover, and an external thread is arranged on the power output shaft of the rotary drive component The power output shaft of the rotating drive component is threadedly connected to the connecting frame, and the piston is connected to the lower part of the connecting frame. The piston fits the inner wall of the cylinder and can move up and down relative to the cylinder; a limiting through hole and a plurality of mounting through holes are provided on the piston, the lower end of the slide rod is provided on the upper part of the lower end cover, and the upper end of the slide rod passes through the limiting through hole and extends to the top of the piston, and a plurality of permeable membranes are provided at the lower part of the piston, and each of the permeable membranes corresponds to a position of the mounting through hole.

2. The osmotic pump sampler according to claim 1, characterized in that: The drainage pipes are arranged in plurality, and the upper end cover is provided with a plurality of upper threaded holes, and each of the drainage pipes is threadedly connected to one of the upper threaded holes.

3. The osmotic pump sampler according to claim 2, characterized in that: The osmotic pump also includes a plurality of upper bolts, the upper end cover includes an upper cover plate and an upper cylinder arranged at the lower part of the upper cover plate, each of the upper threaded holes passes through the upper cover plate and the upper cylinder, and the rotation driving component is arranged at the lower part of the upper cylinder; a first annular groove is arranged on the outside of the upper cylinder, a first sealing ring is installed in the first annular groove, the upper cylinder is arranged at the upper part of the cylinder, the first sealing ring is fitted with the inner wall of the cylinder, a plurality of upper mounting holes are arranged on the upper cover plate along the circumferential direction, each of the upper bolts passes through one of the upper mounting holes and is threadedly installed on the upper end surface of the cylinder.

4. The osmotic pump sampler according to claim 1, characterized in that: The lower end cover is provided with a lower threaded hole, and the upper end of the water sample storage coil is threadedly connected to the lower threaded hole.

5. The osmotic pump sampler according to claim 4, characterized in that: The osmotic pump also includes a plurality of lower bolts, the lower end cover includes a lower cover plate and a lower cylinder arranged at the upper part of the lower cover plate, each of the lower threaded holes passes through the lower cover plate and the lower cylinder, the lower end of the sliding rod is arranged at the upper part of the lower cylinder; a second annular groove is arranged on the outside of the lower cylinder, a second sealing ring is installed in the second annular groove, the lower cylinder is arranged at the lower part of the cylinder, the second sealing ring is fitted with the inner wall of the cylinder, a plurality of lower mounting holes are arranged on the lower cover plate along the circumferential direction, each of the lower bolts passes through one of the lower mounting holes and is threadedly installed on the lower end surface of the cylinder.

6. The osmotic pump sampler according to claim 1, characterized in that: The piston includes a moving block and a third sealing ring. A third annular groove is provided on the outside of the moving block. The third sealing ring is installed in the third annular groove and fits with the inner wall of the cylinder. The connecting frame is arranged on the upper part of the moving block. The moving block is provided with the limiting through hole and multiple installation through holes.

7. The osmotic pump sampler according to claim 6, characterized in that: The connecting frame includes a horizontal plate, two connecting plates, two fixed plates and two fixed components. The two connecting plates are respectively arranged at the lower ends of both sides of the horizontal plate. A fixed plate is arranged at the lower end of each connecting plate. Each fixed component fixes one fixed plate to the moving block. A connecting threaded hole is arranged in the middle of the horizontal plate, and the power output shaft of the rotating drive component is installed in the connecting threaded hole.

8. The osmotic pump sampler according to claim 7, characterized in that: The fixing component is a fixing bolt, the fixing plate is provided with a fixing through hole, the moving block is provided with two fixing threaded holes, and each of the fixing bolts passes through one of the fixing through holes and is installed in one of the fixing threaded holes.

9. The osmotic pump sampler according to claim 6, characterized in that: The permeable membrane is a capsule-shaped structure with an open upper end and a closed lower end. A plurality of mounting cylinders are arranged on the lower surface of the moving block, each mounting cylinder corresponds to a mounting through hole position, and the upper end of each permeable membrane is fixedly sleeved on a mounting cylinder.

10. The osmotic pump sampler according to claim 1, characterized in that: The rotary drive component is a waterproof motor.

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