Oil water quality sample parallel collection device

Abstract

The invention discloses an oil water quality sample parallel collection device, and belongs to the technical field of collection devices. A parallel collection device for oil water quality samples comprises a frame, a lower limiting sliding rail and an upper limiting sliding rail which are fixedly connected to the two sides of the frame, and further comprises two sets of lifting sliding rails fixedly connected to the frame, small floaters are installed in the lifting sliding rails in a sliding mode, the small floaters are connected with a lifting plate, and the lifting plate is connected with the lower limiting sliding rail and the upper limiting sliding rail. A folding air bag is fixedly connected to the frame, the free end of the folding air bag is connected with the lifting plate, a drainage pipe and a water inlet pipe are arranged on the folding air bag, the water inlet pipe is connected with the bottom of the sample bottle, and one-way valves are arranged at the input ends of the drainage pipe and the water inlet pipe; through cooperation of the folding air bag and the small floater, the proportion of oil and seawater in the sample bottle is effectively controlled in the collection process, the problem that the collection amount of oil samples is insufficient due to excessive seawater is solved, and the purity and representativeness of the samples are improved.

Description

Technical Field

[0001] The invention relates to the technical field of collection devices, and in particular to a parallel collection device for oil and water quality samples. Background Art

[0003] In marine environmental monitoring, the detection of oil components in seawater is crucial. The oil water quality sample collection device is a professional equipment used to collect oil pollutants in water bodies. Its design and use are aimed at ensuring the accuracy and representativeness of sampling.

[0004] Traditionally, when collecting oil water quality samples, sampling personnel usually use a dedicated oil sampler to ensure that no additional oil components are introduced during the sampling process, thereby ensuring the accuracy of the final analysis results. However, according to the requirements of Article 4.6 of GB17378.2-2007 "Marine Monitoring Specifications Part 2: Data Processing and Analysis Quality Control", the quality control system needs to collect original double parallel samples, but there is currently no parallel sampler specifically for oil water quality samples. In addition, when the existing oil water quality sample collection device collects oil samples on the sea surface, seawater and oil will enter the bottle at the same time, and the proportion of seawater is relatively large, resulting in insufficient oil sample collection and the purity of the sample will be affected. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that seawater and oil will enter the bottle at the same time, and the seawater accounts for a larger proportion, resulting in insufficient oil sample collection and affecting the purity of the sample, and a parallel collection device for oil and water quality samples is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A parallel collection device for oil and water quality samples, comprising a frame and a lower limit slide rail and an upper limit slide rail fixedly connected to both sides of the frame, two large floats fixedly connected to both sides of the upper end of the frame, and also comprising: a lower limit rod slidably installed in the lower limit slide rail, wherein the lower limit rod and two sample bottles are slidably installed in the frame, and two upper limit rods are slidably installed in the upper limit slide rail, and the upper limit rod cooperates with the lower limit rod, and is fixedly connected to two groups of lifting rails on the frame, wherein each group of the lifting rails corresponds to a sample bottle, and each group of the lifting rails is set to two and is respectively on both sides of the sample bottle, and a small float is slidably installed in the lifting rail, and a lifting plate is connected to the small float, wherein a folding airbag is fixedly connected to the frame, and the free end of the folding airbag is connected to the lifting plate, and a drain pipe and a water inlet pipe are provided on the folding airbag, and the water inlet pipe is connected to the bottom of the sample bottle, and the input ends of the drain pipe and the water inlet pipe are both provided with a one-way valve.

[0007] Preferably, a lifting slider is slidably installed in the lifting slide rail, and side slide grooves are opened on both sides of the lifting slide rail. Both ends of the lifting slider are slidably installed in the side slide grooves, wherein both ends of the lifting slider are fixedly connected with connecting plates, and the connecting plate is fixedly connected with a mounting plate, the small float is fixedly connected to the mounting plate, and the height of the small float in the frame is lower than the height of the mouth of the sample bottle.

[0008] In order to absorb the seawater at the bottom of the bottle, preferably, a lifting plate is fixedly connected to the connecting plate, a push plate is fixedly connected to the free end of the folding airbag, and the lifting plate is fixedly connected to the push plate.

[0009] In order to reduce the friction force when the float falls, further, a wheel axle is fixedly connected to the connecting plate, a pulley is rotatably mounted on the wheel axle, and the pulley is fitted to the outer wall of the lifting slide rail.

[0010] In order to prevent the sample from spilling, further, two groups of L-shaped plates are fixedly connected to the two upper limit rods, each group of L-shaped plates is provided with two, and each group of L-shaped plates is arranged on both sides of the mouth of the sample bottle, wherein a transverse sliding groove is opened on the horizontal surface of the L-shaped plate, a transverse sliding block is slidably installed in the transverse sliding groove, a sliding rod is fixedly connected to the two transverse sliding blocks, and a bottle cap is fixedly connected to the sliding rod.

[0011] In order to seal the sample bottle, further, a fixing plate is fixedly connected to the bottle cap, and the fixing plate is fixedly installed on the sliding rod. The fitting surfaces of the two bottle caps are provided with magnetic blocks. When the two magnetic blocks are attracted to each other, the two bottle caps seal the mouth of the sample bottle.

[0012] In order to drive the bottle cap to slide, further, a longitudinal slide groove is opened on the vertical surface of the L-shaped plate, a longitudinal slider is slidably installed in the longitudinal slide groove, a top plate is fixedly connected to the longitudinal slider, and the top plate is against the small float, wherein a connecting rod is fixedly connected to the longitudinal slider, the top plate is fixedly connected to the connecting rod, the connecting rod passes through and slides on the L-shaped plate, a rotating plate is rotatably installed on the connecting rod, and the free end of the rotating plate is rotatably installed on the sliding rod.

[0013] In order to automatically reset the bottle cap, further, a guide rod is fixedly connected in the longitudinal slide groove, the longitudinal slider is slidably installed on the guide rod, and a reset spring is sleeved on the guide rod, and the reset spring is against the longitudinal slider.

[0014] In order to fix the bottle body, further, both ends of the upper limit rod and the lower limit rod are fixedly connected with limit buckles, and the limit buckles cooperate with the upper limit slide rail and the lower limit slide rail.

[0015] In order to facilitate the lifting and collection of the device, further, a traction rope is provided on the frame, and the traction rope is connected to the ship lifting device.

[0016] Compared with the prior art, the present invention provides a parallel collection device for oil and water quality samples, which has the following beneficial effects: 1. The parallel collection device for oil and water quality samples can fix two sample bottles in parallel at the same time through the setting of the upper limit rod and the lower limit rod, simplify the sample fixing method in the existing oil sampling device, and realize the simultaneous collection of parallel samples, reducing the uncertainty caused by the time and space differences in the sampling process.

[0017] 2. The parallel collection device for oil and water quality samples effectively controls the ratio of oil and seawater in the sample bottle during the collection process through the cooperation between the folded airbag and the small float, avoiding the problem of insufficient oil sample collection due to excessive seawater, improving the purity and representativeness of the samples, and ensuring the accuracy and reliability of the oil components in the collected oil and water quality samples. The device has a high degree of automation and is easy to operate. It can adapt to different marine environments and sampling requirements, greatly improving the efficiency and safety of sampling.

[0018] 3. The parallel collection device for oil and water quality samples cooperates with the folding airbag and the sample bottle. After the folding airbag is unfolded to absorb the seawater at the bottom of the sample bottle, the folding airbag filled with seawater supports and protects the bottle body, thereby preventing the bottle body from shaking due to the influence of water inertia and waves when seawater enters the sample bottle, thereby further keeping the bottle body stable.

[0019] 4. The parallel collection device for oil and water quality samples cooperates with the small float and the top plate so that during the collection process, when the oil sample reaches a certain height, the small float will contact the top plate, thereby triggering the top plate to apply pressure to the bottle cap, pushing the bottle cap to slide along the slide rod to achieve sealing of the sample bottle. This not only ensures the sealing of the sample bottle during the collection process, but also when the sample bottle is lifted, the cooperation between the top plate and the small float can prevent the sample from overflowing, thereby ensuring the integrity and safety of the sample.

[0020] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. The present invention effectively controls the ratio of oil and seawater in the sample bottle during the collection process through the cooperation between the folded airbag and the small float, avoiding the problem of insufficient oil sample collection due to excessive seawater and improving the purity and representativeness of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the parallel collection device for oil and water quality samples proposed by the present invention is shown in FIG. Figure 1 .

[0022] Figure 2 The overall structure of the parallel collection device for oil and water quality samples proposed by the present invention is shown in FIG. Figure 2 .

[0023] Figure 3 This is a schematic diagram of the sample bottle structure of a parallel collection device for oil and water quality samples proposed by the present invention.

[0024] Figure 4 This is a schematic diagram of the folded airbag structure of a parallel collection device for oil and water quality samples proposed by the present invention.

[0025] Figure 5 The invention provides a parallel collection device for oil and water quality samples. Figure 1 Enlarged view of point A in the middle.

[0026] Figure 6 This is a schematic diagram of the bottle cap structure of a parallel collection device for oil and water quality samples proposed by the present invention.

[0027] Figure 7 The invention provides a parallel collection device for oil and water quality samples. Figure 6 Enlarged view of point B in the middle.

[0028] Figure 8 The invention provides a parallel collection device for oil and water quality samples. Figure 1 Enlarged view of point C in the middle.

[0029] In the figure: 1. frame; 11. lower limit slide rail; 12. upper limit slide rail; 13. traction rope; 14. lower limit rod; 15. upper limit rod; 16. limit buckle; 17. large float; 2. sample bottle; 21. one-way valve; 3. folding airbag; 31. push plate; 32. drain pipe; 33. water inlet pipe; 4. lifting slide rail; 41. small float; 42. lifting slider; 43. connecting plate; 44. lifting plate; 45. mounting plate; 46. side slide groove; 47. axle; 48. pulley; 5. L-shaped plate; 51. horizontal slider; 52. slide rod; 53. fixed plate; 54. bottle cap; 55. rotating plate; 56. horizontal slide groove; 57. longitudinal slide groove; 58. longitudinal slider; 59. guide rod; 510. reset spring; 511. top plate; 512. connecting rod; 513. magnetic block. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Embodiment 1:

[0032] Reference Figure 1-Figure 8 , a parallel collection device for oil water quality samples, including a frame 1 and a lower limit slide rail 11 and an upper limit slide rail 12 fixedly connected to both sides of the frame 1. The frame 1 serves as a supporting structure of the entire collection system. Two large floats 17 fixedly connected to both sides of the upper end of the frame 1 enable the device to float at 0.5m above the seawater surface in a certain posture after being put into seawater, so that the sample bottle 2 fixed in the device is filled with seawater. The device also includes: a lower limit rod 14 slidably installed in the lower limit slide rail 11, wherein the lower limit rod 14 and the frame 1 are slidably installed in the lower limit slide rail 11. Two sample bottles 2 are installed dynamically, and a triangular rod is provided in the frame 1 for cooperating with the lower limit rod 14 to limit the sample bottle 2. Two upper limit rods 15 are slidably installed in the upper limit slide rail 12. Both ends of the upper limit rod 15 and the lower limit rod 14 are fixedly connected with limit buckles 16. The limit buckle 16 cooperates with the upper limit slide rail 12 and the lower limit slide rail 11 to fix and support the sample bottle 2. The two upper limit rods 15 and the lower limit rod 14 work together to further ensure the stability of the sample bottle 2 in the vertical direction. In order to prevent these rods from accidentally sliding out of the slide rails, both ends of them are fixedly connected with limit buckles 16, which play a good limiting role. Two sets of lifting rails 4 are fixedly connected to the frame 1, wherein each set of lifting rails 4 corresponds to a sample bottle 2, and each set of lifting rails 4 is set to two and are respectively on both sides of the sample bottle 2. A small float 41 is slidably installed in the lifting rail 4. This small float 41 can move up and down according to the water level position, thereby driving the lifting plate 44 connected thereto to move together. The lifting plate is connected to the small float 41. 44, wherein a folding airbag 3 is fixedly connected to the frame 1, and the free end of the folding airbag 3 is connected to the lifting plate 44, and a drain pipe 32 and a water inlet pipe 33 are provided on the folding airbag 3, and the water inlet pipe 33 is connected to the bottom of the sample bottle 2, wherein the water inlet pipe 33 is connected to the bottom of the sample bottle 2, and is used to suck the seawater at the bottom of the sample bottle 2 into the sample bottle 2, and the drain pipe 32 is used to discharge the water sample in the folding airbag 3, and the input ends of the drain pipe 32 and the water inlet pipe 33 are both provided with a one-way valve 21 to ensure that the water can only flow in one direction.

[0033] Before sampling, the upper limit rod 15 and the lower limit rod 14 are moved to both sides of the frame 1, and the sample bottle 2 is ensured to be in an appropriate position. When it is necessary to collect samples, the frame 1 is pulled by the traction rope 13 to make the entire device descend to a predetermined water depth. At this time, the oil water quality sample on the seawater surface will enter the sample bottle 2, and the small float 41 will rise with the rise of the water level, thereby driving the lifting plate 44 to rise. Based on the incompatibility of oil and water, and the fact that the density of most oils is lower than that of seawater, the connected folding airbag 3 is driven to unfold, and the seawater at the bottom of the bottle body with a density greater than that of oil is sucked into the folding airbag 3. When the predetermined sampling volume is reached, the traction rope 13 is controlled to make the device rise to the water surface. At this time, due to the action of the one-way valve 21 of the drain pipe 32, the small float 41 detaches from the sponge and descends by its own weight and compresses the folding airbag 3. The water sample in the folding airbag 3 will be discharged, while the oil sample in the sample bottle 2 will remain in the bottle. In this way, the purity of the collected sample can be ensured. It is higher and not affected by the external environment. In addition, due to the parallel design of the device, multiple samples can be collected at the same time, which improves the efficiency and accuracy of sampling.

[0034] A traction rope 13 is provided on the frame 1 and is connected to a vessel lifting device.

[0035] During sampling, the traction rope 13 can drive the entire collection device to perform lifting and lowering operations through the drive of the ship's lifting device, which enables the collection device to easily descend from the water surface to a specified depth for sampling, and then be lifted to the water surface for sample collection and processing.

[0036] Reference Figure 4-Figure 5 A lifting slider 42 is slidably installed in the lifting rail 4, and side slide grooves 46 are opened on both sides of the lifting rail 4. Both ends of the lifting slider 42 are slidably installed in the side slide grooves 46, wherein the lifting slider 42 is fixedly connected with a connecting plate 43 at both ends, which is used to simultaneously connect the lifting plate 44 and the mounting plate 45, and the connecting plate 43 is fixedly connected with the mounting plate 45, which serves as the installation basis of the small float 41. The small float 41 is fixedly connected to the mounting plate 45, and the height of the small float 41 in the frame 1 is lower than the height of the bottle mouth of the sample bottle 2. The small float 41 can move up and down with the rise and fall of the water level, thereby driving the lifting plate 44 to rise and fall, and the connecting plate 43 is fixedly connected to the mounting plate 45. A lifting plate 44 is fixedly connected, and a push plate 31 is fixedly connected to the free end of the folding airbag 3. The lifting plate 44 is fixedly connected to the push plate 31. When the small float 41 follows the rise and fall of the water level, it drives the push plate 31 to rise and fall synchronously, thereby realizing the squeezing or unfolding of the folding airbag 3. A wheel axle 47 is fixedly connected to the connecting plate 43, and a pulley 48 is rotatably installed on the wheel axle 47. The pulley 48 is fitted on the outer wall of the lifting slide rail 4. The design of the pulley 48 reduces the friction between the lifting slider 42 and the lifting slide rail 4, making the lifting process smoother and more efficient, and avoiding the small float 41 from being affected by friction and unable to descend in time when leaving the sea surface. Embodiment 2:

[0037] The embodiment is basically the same as the first embodiment, and further, a specific implementation scheme for opening and closing the mouth of the sample bottle 2 is specifically added.

[0038] Reference Figure 2 , Figure 5 , Figure 7 Two groups of L-shaped plates 5 are fixedly connected to the two upper limit rods 15, each group of L-shaped plates 5 is provided with two, and each group of L-shaped plates 5 is arranged on both sides of the bottle mouth of the sample bottle 2. Its design provides both a transverse slide 56 for the opening and closing operation of the bottle cap and a longitudinal slide 57 for the lifting and lowering of the top plate 511, thereby realizing automatic control of the bottle cap 54. Among them, the horizontal surface of the L-shaped plate 5 is provided with a transverse slide 56, and a transverse slider 51 is slidably installed in the transverse slide 56. The two transverse sliders 51 are fixedly connected with a slide rod 52, and the slide rod A bottle cap 54 is fixedly connected to the L-shaped plate 52, which can seal or open the mouth of the sample bottle 2. A fixing plate 53 is fixedly connected to the bottle cap 54, and the fixing plate 53 is fixedly installed on the slide bar 52. The fitting surfaces of the two bottle caps 54 are provided with magnetic blocks 513. When the two magnetic blocks 513 are attracted to each other, the two bottle caps 54 seal the mouth of the sample bottle 2. A longitudinal slide groove 57 is provided on the vertical surface of the L-shaped plate 5, and a longitudinal slide block 58 is slidably installed in the longitudinal slide groove 57. A top plate 511 is fixedly connected to the longitudinal slide block 58, and the top plate 511 is connected to the top plate 511. The small float 41 is offset against each other. When the small float 41 rises with the water level, it will push the top plate 511 and the longitudinal slider 58 to rise. Among them, the longitudinal slider 58 is fixedly connected with a connecting rod 512, the top plate 511 is fixedly connected to the connecting rod 512, the connecting rod 512 penetrates and slides on the L-shaped plate 5, and a rotating plate 55 is rotatably installed on the connecting rod 512. The free end of the rotating plate 55 is rotatably installed on the slide bar 52. A guide rod 59 is fixedly connected in the longitudinal slide groove 57. The longitudinal slider 58 is slidably installed on the guide rod 59. When the slider 58 rises, the rotating plate 55 is driven to rotate through the connecting rod 512, thereby pushing the slide bar 52 and the bottle cap 54 to move to both sides, so that the bottle cap 54 is opened. A return spring 510 is sleeved on the guide rod 59, and the return spring 510 is against the longitudinal slider 58. When the top plate 511 is pushed up by the small float 41, the return spring 510 will store energy and push the top plate 511 and the longitudinal slider 58 to return to their original position when the small float 41 descends, ensuring that the bottle cap 54 is sealed to the sample bottle 2 after the equipment collects the sample.

[0039] When the small float 41 touches the sea surface, the top plate 511 is pushed up by the small float 41, and the bottle cap 54 automatically moves to both sides and separates through the transmission action of the rotating plate 55, thereby opening the bottle mouth of the sample bottle 2 to collect the oil sample on the sea surface. When the water level drops, the top plate 511 is pushed down by the return spring 510, and the rotating plate 55 rotates in the opposite direction, driving the bottle cap 54 to move to the middle and fit again, and the sealing is achieved through the adsorption action of the magnetic block 513.

[0040] In the present invention, before using the device to collect samples, first, the lower limit rod 14 and the two upper limit rods 15 are moved to the two sides of the frame 1, and after the two sample bottles 2 are placed in the frame 1, the sample bottles 2 are fixed by the cooperation of the limit buckles 16 on the limit rods and the limit slide rails to ensure that the sample bottles 2 remain stable during the collection process. Then, the entire device is lowered to a predetermined water depth through the traction rope 13. At this time, the oil water quality sample in the seawater will enter the sample bottle 2. As the water level rises, the small float 41 rises accordingly, thereby driving the lifting plate 44 to rise, and the folding airbag 3 is unfolded to suck the seawater at the bottom of the bottle into it. When the folding airbag 3 is unfolded, the folding airbag 3 fits the sample bottle 2 to avoid the seawater entering the sample bottle 2 from being affected by the inertia of the water flow and the waves. The impact causes the bottle body to shake, and the folding air bag 3 filled with seawater supports and protects the bottle body, further keeping the bottle body stable. When the predetermined sampling volume is reached, the device is raised to the water surface by controlling the traction rope 13. At this time, the one-way valve 21 of the drain pipe 32 ensures that the water sample is discharged, while the oil sample in the sample bottle 2 is kept in the bottle. In this way, it can be ensured that the collected samples are of high purity and are not affected by the external environment. In addition, due to the parallel design of the device, multiple samples can be collected at the same time, which improves the efficiency and accuracy of sampling. During sampling, the traction rope 13 can drive the entire collection device to perform lifting and lowering operations through the drive of the ship's lifting device, which enables the collection device to easily descend from the water surface to the specified depth for sampling, and then be lifted to the water surface for sample collection and processing.

[0041] When the device is put into the sampling and the sampling is finished and rises, the small float 41 is affected by the buoyancy of the seawater to drive the top plate 511 to rise and fall, so as to realize the automatic opening and sealing of the mouth of the sample bottle 2. Specifically, when the small float 41 rises with the water level, the top plate 511 is pushed up, and the bottle cap 54 moves to both sides through the linkage mechanism of the connecting rod 512 and the rotating plate 55, so as to open the mouth of the sample bottle 2 and allow the sea surface oil sample to enter. When the water level drops, the top plate 511 drops under the action of the reset spring 510, and the rotating plate 55 rotates in the opposite direction, and the bottle cap 54 moves to the middle and re-fits, and the sealing is realized through the adsorption effect of the magnetic block 513. This automatic opening and closing mechanism not only improves the efficiency of sampling, but also ensures the purity and safety of the sample during the collection process, and avoids the sample collected in the sample bottle 2 from being shaken by the frame 1 when the driving device rises after collecting the sample.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A parallel collection device for oil-water samples, comprising a frame (1), a lower limit slide rail (11) and an upper limit slide rail (12) fixedly connected to both sides of the frame (1), and two large floats (17) fixedly connected to both sides of the upper end of the frame (1), characterized in that: Also includes: A lower limit rod (14) slidably mounted in the lower limit rail (11), The lower limit rod (14) and the frame (1) are slidably mounted with two sample bottles (2), and the upper limit rail (12) is slidably mounted with two upper limit rods (15), and the upper limit rods (15) cooperate with the lower limit rod (14); Two sets of lifting slide rails (4) fixedly connected to the frame (1), Each set of the lifting rails (4) corresponds to one sample bottle (2), and each set of the lifting rails (4) is provided with two, one on each side of the sample bottle (2). A small float (41) is slidably mounted in the lifting rails (4), and a lifting plate (44) is connected to the small float (41). The frame (1) is fixedly connected to a folding airbag (3), the free end of the folding airbag (3) is connected to a lifting plate (44), a drain pipe (32) and a water inlet pipe (33) are provided on the folding airbag (3), and the water inlet pipe (33) is connected to the bottom of the sample bottle (2), and the input ends of the drain pipe (32) and the water inlet pipe (33) are both provided with a one-way valve (21).

2. The parallel collection device for oil and water quality samples according to claim 1, characterized in that: A lifting slider (42) is slidably mounted in the lifting slide rail (4), side slide grooves (46) are provided on both sides of the lifting slide rail (4), and both ends of the lifting slider (42) are slidably mounted in the side slide grooves (46). Wherein, the two ends of the lifting slider (42) are fixedly connected to connecting plates (43), the connecting plate (43) is fixedly connected to a mounting plate (45), the small float (41) is fixedly connected to the mounting plate (45), and the height of the small float (41) in the frame (1) is lower than the height of the bottle mouth of the sample bottle (2).

3. The parallel collection device for oil and water quality samples according to claim 2, characterized in that: A lifting plate (44) is fixedly connected to the connecting plate (43), a push plate (31) is fixedly connected to the free end of the folding airbag (3), and the lifting plate (44) is fixedly connected to the push plate (31).

4. The parallel oil and water quality sample collection device according to claim 3, characterized in that: The connecting plate (43) is fixedly connected to a wheel axle (47), a pulley (48) is rotatably mounted on the wheel axle (47), and the pulley (48) is fitted to the outer wall of the lifting slide rail (4).

5. The parallel collection device for oil and water quality samples according to claim 1 is characterized in that: Two groups of L-shaped plates (5) are fixedly connected to the two upper limit rods (15), each group of L-shaped plates (5) is provided with two, and each group of L-shaped plates (5) is arranged on both sides of the bottle mouth of the sample bottle (2). The L-shaped plate (5) is provided with a transverse sliding groove (56) on a horizontal surface, a transverse sliding block (51) is slidably mounted in the transverse sliding groove (56), two transverse sliding blocks (51) are fixedly connected to sliding rods (52), and a bottle cap (54) is fixedly connected to the sliding rods (52).

6. The parallel oil and water quality sample collection device according to claim 5, characterized in that: The bottle cap (54) is fixedly connected to a fixing plate (53), and the fixing plate (53) is fixedly mounted on the slide bar (52). The fitting surfaces of the two bottle caps (54) are both provided with magnetic blocks (513). When the two magnetic blocks (513) are attracted to each other, the two bottle caps (54) seal the mouth of the sample bottle (2).

7. The parallel oil and water quality sample collection device according to claim 6, characterized in that: A longitudinal slide groove (57) is provided on the vertical surface of the L-shaped plate (5), a longitudinal slide block (58) is slidably mounted in the longitudinal slide groove (57), a top plate (511) is fixedly connected to the longitudinal slide block (58), and the top plate (511) abuts against the small float (41). The longitudinal slider (58) is fixedly connected to a connecting rod (512), the top plate (511) is fixedly connected to the connecting rod (512), the connecting rod (512) penetrates and slides on the L-shaped plate (5), a rotating plate (55) is rotatably mounted on the connecting rod (512), and the free end of the rotating plate (55) is rotatably mounted on the sliding rod (52).

8. The parallel oil and water quality sample collection device according to claim 7, characterized in that: A guide rod (59) is fixedly connected in the longitudinal slide groove (57), and the longitudinal slider (58) is slidably mounted on the guide rod (59). A return spring (510) is sleeved on the guide rod (59), and the return spring (510) abuts against the longitudinal slider (58).

9. The parallel collection device for oil and water quality samples according to claim 1, characterized in that: Both ends of the upper limit rod (15) and the lower limit rod (14) are fixedly connected to a limit buckle (16), and the limit buckle (16) cooperates with the upper limit slide rail (12) and the lower limit slide rail (11).

10. The parallel collection device for oil and water quality samples according to claim 1, characterized in that: A traction rope (13) is provided on the frame (1), and the traction rope (13) is connected to a vessel lifting device.

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