Surface water sampling device

Abstract

The present invention relates to the technical field of water quality sampling equipment, and specifically discloses a surface water sampling device, comprising: a cylinder, a one-way valve and a drain pipe arranged at the bottom of the cylinder, a pressure rod elastically slidably connected to the cylinder, and a piston arranged on the pressure rod, wherein the cylinder has two upper and lower chambers, the diameter of the lower chamber is larger than the diameter of the upper chamber, and the cylinder is also provided with a first cleaning module, a second cleaning module and a water tank; the first cleaning module comprises a fixing seat vertically slidably connected to the piston through a spring. The beneficial effects of the present invention are as follows: during cleaning, it is only necessary to press the pressure rod downward, and in the process of the pressure rod moving to the bottom, the water source provided by the water tank can be used to wash the side wall of the upper chamber of the cylinder, the bottom surface of the piston, the bottom inside the cylinder, the peripheral wall of the lower chamber of the cylinder, and the outer peripheral wall of the piston through the first cleaning module and the second cleaning module, respectively, so that the flushing of the device can be completed efficiently and quickly, which improves work efficiency and saves manpower.

Description

Technical Field

[0001] The invention relates to the technical field of water quality sampling equipment, and in particular to a surface water sampling device. Background Art

[0002] Water pollution is caused by harmful chemicals that reduce or lose the use value of water. Water that pollutes the environment, acids, alkalis, oxidants in sewage, and compounds such as copper, cadmium, mercury, arsenic, benzene, dichloroethane, ethylene glycol and other organic toxins will poison aquatic organisms and affect drinking water sources and scenic spots. When organic matter in sewage is decomposed by microorganisms, it consumes oxygen in the water, affecting the life of aquatic organisms. After the dissolved oxygen in the water is exhausted, organic matter undergoes anaerobic decomposition, producing unpleasant gases such as hydrogen sulfide and mercaptans, which further deteriorate the water quality. Environmental protection departments need to frequently sample and test various water qualities in order to monitor and take corresponding measures.

[0003] A Chinese patent with authorization announcement number CN212159194U discloses a float fixed depth water quality sampler, which includes a sampling barrel, a piston sampling device arranged in the sampling barrel, a driving device for driving the piston sampling device to move, and a float fixedly connected to the sampling barrel for controlling the diving depth of the sampling barrel; the patent uses the driving device to drive the piston sampling device to work, and before the sampling barrel reaches the specified depth, the piston sampling device does not work, and the water sample will not enter the sampling barrel. When the sampling barrel reaches the specified depth, the limiting device releases the limiting effect on the piston sampling device, and under the action of the elastic pull rope, the piston base moves upward, thereby achieving sampling.

[0004] The existing float fixed depth water quality sampler does not have a cleaning function. After each use, it is necessary to inject clean water and shake it repeatedly, and then drain the cleaned water. If you want to clean the debris attached to the inner wall of the equipment and the outer wall of the piston, you need to add water and shake it repeatedly to clean it. This will reduce the practicality of the sampler and reduce the efficiency of water quality sampling. Summary of the invention

[0005] The present invention provides a surface water sampling device, aiming to solve the problem that the existing float fixed depth water quality sampler in the related technology does not have a cleaning function. After each use, it is necessary to inject clean water and shake it repeatedly, and then discharge the cleaned water. If it is desired to clean the debris attached to the inner wall of the device and the outer wall of the piston, it is necessary to repeatedly add water and shake it for cleaning, which will reduce the practicability of the sampler and reduce the technical problem of the efficiency of water quality sampling.

[0006] A surface water sampling device of the present invention comprises: a cylinder, a one-way valve and a drain pipe arranged at the bottom of the cylinder, a pressure rod elastically slidably connected to the cylinder and a piston arranged on the pressure rod, the cylinder is provided with an upper and a lower chamber, the diameter of the lower chamber is larger than the diameter of the upper chamber, and the cylinder is also provided with a first cleaning module, a second cleaning module and a water tank; the first cleaning module comprises a fixed seat vertically slidably connected to the piston by a spring, a first annular cavity arranged on the fixed seat and connected to the water tank, and a plurality of nozzles rotating on the fixed seat and connected to the first annular cavity, a through hole for the nozzle to pass through is arranged on the piston, and the nozzle has three spraying directions: vertically downward, horizontally and obliquely upward. A hole, the inner wall of the hole is provided with a first transmission assembly, when the nozzle abuts against the bottom of the cylinder, the nozzle is forced to rotate and slide upward through the first transmission assembly; the second cleaning module includes a swivel seat which is rotatably connected to the piston through a torsion spring and slides with the inner wall of the upper chamber, a second annular cavity provided on the swivel seat and connected with the water tank, and a sliding block which is radially slidably connected to the swivel seat through a spring, the moving end of the sliding block is an inclined surface, and a plurality of flushing holes which are connected with the second annular cavity are provided on the sliding block, the flushing holes have two flushing directions: horizontally and toward the side wall of the piston after sliding out of the swivel seat, and a second transmission assembly is provided on the inner wall of the upper chamber so that the swivel seat rotates to store force for the torsion spring when descending along the upper chamber.

[0007] Beneficial effect: When cleaning, you only need to press the pressure rod downward. When the pressure rod moves to the bottom, you can use the water source provided by the water tank to flush the side walls of the upper chamber of the cylinder, the bottom surface of the piston, the bottom inside the cylinder, the peripheral wall of the lower chamber of the cylinder, and the outer peripheral wall of the piston through the first cleaning module and the second cleaning module. The flushing of the device can be completed efficiently and quickly, which improves work efficiency and saves manpower.

[0008] Preferably, the water tank is provided with an opening and closing component for controlling the water supply switch, and the opening and closing component includes an up and down through-going channel opened on the water tank, and a connecting hole connected to the water tank is provided near the bottom of the channel, and a connecting rod is slidably engaged up and down in the channel, and the connecting rod is a hollow structure with an open bottom, and a water hole connected to the interior of the connecting rod is provided on the side wall of the connecting rod.

[0009] The effect is that the water in the water tank can be controlled to flow downward, so that it can be opened and closed as needed.

[0010] Preferably, the first transmission assembly includes a second driving groove formed on the inner wall of the perforation, the second driving groove is spirally arranged on the inner wall of the perforation, a second protrusion is provided on the nozzle, and the second protrusion is located in the second driving groove.

[0011] Preferably, the second transmission assembly includes a third driving groove opened on the inner wall of the upper chamber, the third driving groove is spirally arranged on the inner wall of the upper chamber, a third protrusion is provided on the rotating seat, and the third protrusion is located in the third driving groove.

[0012] Preferably, a partition is provided in the water tank, a swivel is sealingly and rotatably installed on the water tank, a first protrusion is provided on the inner wall of the swivel, a first driving groove is provided on the outer wall of the pressure rod, an extrusion plate is fixedly installed on the swivel, and the extrusion plate is slidably matched with the inner wall of the water tank.

[0013] The effect is that when the pressure rod descends, it can drive the swivel and the extrusion plate to rotate, increase the pressure of the water supply, and thus improve the flushing effect.

[0014] Preferably, the sliding block is a hollow structure, and a telescopic tube is connected to the sliding block, and the telescopic tube is connected to the second annular cavity.

[0015] Preferably, a water inlet hole which passes through up and down is provided at the center position of the bottom of the cylinder, a filter is fixedly installed at the bottom of the water inlet hole, a one-way valve is located above the water inlet hole, and a plurality of water inlet through holes are circumferentially arranged on the base, the water inlet through hole is in an L-shaped structure, a horizontal section of which is connected with the water inlet hole, and a vertical section of which is connected with the inside of the cylinder, and a plug is installed in the vertical section for sliding up and down by a spring, the inner side of the plug is hollow and the upper end is open, and a through hole is provided on the peripheral wall of the plug, and the plug is correspondingly arranged above and below the nozzle, and a water outlet is provided at the connection between the water inlet through hole and the water inlet hole, and the water outlet has two directions: upwardly inclined toward the one-way valve and downwardly inclined toward the filter.

[0016] The effect is that the water sprayed from the water outlet hole on the water inlet hole will rush to the one-way valve and the filter screen, which can flush the one-way valve clean and at the same time flush the debris in the filter holes of the filter screen downward, further improving the flushing effect of the device and avoiding the impurities attached to the filter screen and the one-way valve from affecting the sampling results.

[0017] Preferably, an L-shaped cleaning pipe is installed on the piston, the vertical section of the cleaning pipe extends above the piston, the vertical section is slidably matched with the fixed seat, and the vertical section of the cleaning pipe is connected to the first annular cavity on the fixed seat. When the piston descends to the bottom, the opening of the horizontal section of the cleaning pipe faces the drain pipe.

[0018] The effect is that the drain pipe can be flushed to wash away the impurities attached to the drain pipe, thereby further improving the cleaning effect.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are as follows: When cleaning, you only need to press the pressure rod downward. When the pressure rod moves to the bottom, you can use the water source provided by the water tank to flush the side walls of the upper chamber of the cylinder, the bottom surface of the piston, the bottom inside the cylinder, the peripheral wall of the lower chamber of the cylinder and the outer peripheral wall of the piston through the first cleaning module and the second cleaning module respectively. The flushing of the device can be completed efficiently and quickly without repeatedly shaking the cylinder, which not only improves work efficiency and saves manpower but also ensures the cleaning effect.

[0020] The vertical downward spray hole at the bottom of the nozzle will spray water to the inside of the plug, and then flow into the water inlet hole from the through hole on the side wall. The water sprayed from the water outlet hole on the water inlet hole will rush to the one-way valve and the filter screen, which can flush the one-way valve clean and flush the debris in the filter holes of the filter screen downward, thereby improving the flushing effect of the device and avoiding the influence of impurities attached to the filter screen and the one-way valve on the sampling results.

[0021] When the piston descends to the bottom, the cleaning pipe can flush the inside of the drain pipe, washing away impurities attached to the drain pipe, which can further improve the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a cross-sectional view of the present invention.

[0024] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle.

[0026] Figure 5 It is a partial axonometric cross-sectional view of the cylinder of the present invention.

[0027] Figure 6 For the present invention Figure 5 Enlarged view of point C in the middle.

[0028] Figure 7 It is a structural schematic diagram of the pressure rod of the present invention.

[0029] Figure 8 It is an exploded schematic diagram of the water tank and the swivel of the present invention.

[0030] Fig. 9 It is an exploded schematic diagram of the piston, the fixed seat and the rotating seat of the present invention.

[0031] Reference numerals: 10. Cylinder; 11. Base; 12. Filter; 13. One-way valve; 14. Mounting frame; 15. Pressure rod; 16. Piston; 17. Drain pipe; 20. Slider; 21. Locking block; 22. Float; 30. Water tank; 31. Water hole; 32. Connecting hole; 33. Partition; 34. Rotating ring; 35. Extrusion plate; 36. First protrusion; 37. First driving groove; 38. Connecting rod; 40. Fixed seat; 4 1. First annular cavity; 42. First connecting pipe; 43. Spray head; 44. Second protrusion; 45. Second driving groove; 46. Spray hole; 50. Rotating seat; 51. Second annular cavity; 52. Second connecting pipe; 53. Mounting groove; 54. Sliding block; 55. Flushing hole; 56. Third protrusion; 57. Third driving groove; 58. Telescopic tube; 60. Water inlet hole; 61. Block; 62. Water outlet hole; 70. Cleaning pipe. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] like Figures 1 to 9 As shown, a specific embodiment of a surface water sampling device of the present invention includes a sampling module, a first cleaning module, a second cleaning module, a third cleaning module and a fourth cleaning module.

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the sampling module includes a cylinder 10, a base 11, a filter 12, a one-way valve 13, a mounting frame 14, a pressure rod 15, a piston 16, a float 22 and a locking unit.

[0035] The cylinder 10 is a circular structure that is connected from top to bottom, and the bottom of the cylinder 10 has a step-shaped structure, so that two chambers connected from top to bottom are formed inside the cylinder 10. The chamber inside the step is the lower chamber, and the diameter of the lower chamber is greater than the diameter of the upper chamber.

[0036] The bottom of the cylinder 10 has a base 11, and the center of the base 11 is provided with a water inlet hole that passes through from top to bottom. A filter screen 12 is fixedly installed at the bottom of the water inlet hole, and a one-way valve 13 is installed above the water inlet hole. The side of the cylinder 10 is also provided with a drain pipe 17 that is connected to the lower chamber, and a valve (not shown in the figure) is installed on the drain pipe 17.

[0037] A mounting frame 14 is fixedly mounted above the cylinder 10, a pressure rod 15 is slidably mounted at the center of the mounting frame 14, and a spring is sleeved outside the pressure rod 15, one end of the spring is connected to the mounting frame 14, and the other end is connected to the lower end of the pressure rod 15. The lower end of the pressure rod 15 extends to the inside of the cylinder 10, and a piston 16 is fixedly mounted at its lower end.

[0038] The locking unit includes a slider 20 vertically slidably mounted on the mounting frame 14 by a spring, and the upper end surface of the slider 20 is an inclined surface. A locking block 21 is also horizontally slidably mounted on the mounting frame 14 by a spring, and an inclined surface is also provided on the locking block 21 at a position corresponding to the slider 20, so that when the slider 20 moves upward, the locking block 21 can be pushed to slide horizontally.

[0039] A slot is provided on the pressure rod 15 at a position corresponding to the locking block 21, and the insertion end of the locking block 21 can abut against the slot to lock the pressure rod 15. When the slider 20 moves upward, it can push the locking block 21 to slide horizontally, so that the insertion end of the locking block 21 can be disengaged from the slot, releasing the restriction on the pressure rod 15. The slider 20 is connected to a float 22 by a rope.

[0040] In the initial state, the pressure rod 15 drives the piston 16 to be located at the bottom of the cylinder 10, the spring on the pressure rod 15 is in a stretched state, and the insertion end of the locking block 21 abuts against the slot to lock the pressure rod 15. A pull rope is connected to the mounting frame 14 to pull up the device. When in use, the worker stands on the bridge and puts the device into the river. The weight of the cylinder 10 is heavy and will continue to sink. The connecting rope between the float 22 and the slider 20 is the sampling depth. As the cylinder 10 descends, the float 22 will always float on the river surface. After the connecting rope between the float 22 and the slider 20 reaches the maximum length, the float 22 pulls the slider 20 upward. When the slider 20 moves upward, it can push the locking block 21 to slide horizontally, so that the insertion end of the locking block 21 can be disengaged from the slot, and the restriction on the pressure rod 15 is released. Then the spring on the pressure rod 15 is released, pulling it upward, so that the piston 16 moves upward along the cylinder 10, and negative pressure is formed in the cylinder 10. After the river water passes through the filter screen 12, it enters the cylinder 10 through the one-way valve 13. After the sampling is completed, the device is pulled up by the pull rope, and then the drain pipe 17 is opened to discharge the sampled water for detection.

[0041] It should be noted that the above structure and working principle belong to the prior art and will not be elaborated here.

[0042] The first cleaning module is used to wash the side wall of the upper chamber of the cylinder 10 , the bottom surface of the piston 16 and the bottom of the cylinder 10 .

[0043] Continue back Figures 2 to 9 The first cleaning module includes a water tank 30 , a connecting rod 38 , a pressurizing unit, a fixing seat 40 and a nozzle 43 .

[0044] The water tank 30 is fixedly mounted on the lower surface of the mounting frame 14. The water tank 30 is annular in structure and has a through hole at the center for the pressure rod 15 to pass through. A vertically penetrating channel is provided on the water tank 30 at a position off the center, and a connecting hole 32 communicating with the water tank 30 is provided near the bottom of the channel.

[0045] A connecting rod 38 is provided in the channel for sliding up and down cooperation. The connecting rod 38 is a hollow structure with an open bottom. A water hole 31 connected to the interior of the connecting rod 38 is provided on the side wall. When the connecting rod 38 is pressed downward, the water hole 31 can be connected to the connecting hole 32, so that the water in the water tank 30 can be discharged through the bottom of the connecting rod 38.

[0046] The pressurizing unit includes a swivel 34 which is sealed and rotatably mounted at the center of the water tank 30. An extrusion plate 35 is fixedly mounted on the swivel 34. The extrusion plate 35 is slidably matched with the inner wall of the water tank 30. A vertically arranged partition 33 is provided near the position of the vertically penetrating channel in the water tank 30. The partition 33 separates the space in the water tank 30. The initial position of the extrusion plate 35 abuts against the partition 33 and is located on the side away from the vertically penetrating channel. When the swivel 34 drives the extrusion plate 35 to rotate, the water in the water tank 30 can only rotate toward one side, squeezing the water in the water tank 30, and the water will finally be discharged from the connecting rod 38. In this way, the effect of water flow pressurization is achieved.

[0047] The pressure rod 15 passes through the center of the rotating ring 34, and a first protrusion 36 is provided on the inner wall of the rotating ring 34. A first driving groove 37 is provided on the outer wall of the pressure rod 15. The first driving groove 37 is spirally arranged along the outer wall of the pressure rod 15, and the first protrusion 36 is located in the first driving groove 37, so that when the pressure rod 15 is pressed downward, the rotating ring 34 can be driven to rotate, thereby pushing the water in the water tank 30 to be discharged. It is particularly noted that the upper end of the spring on the pressure rod 15 is rotatably matched with the bottom of the rotating ring 34 to ensure the normal expansion and contraction function of the spring.

[0048] The fixing seat 40 is mounted on the upper surface of the piston 16 by sliding up and down through a spring. The fixing seat 40 is an annular structure, and the pressure rod 15 passes through the center thereof. A first annular cavity 41 is provided inside the fixing seat 40. A first connecting pipe 42 communicating with the first annular cavity 41 is provided on the fixing seat 40. The first connecting pipe 42 is connected to the connecting rod 38 through a hose (not shown in the figure). In this embodiment, the hose is a spiral hose. Thus, the water in the water tank 30 can enter the first annular cavity 41.

[0049] The bottom of the fixed seat 40 is provided with a plurality of nozzles 43 along its circumference, the nozzles 43 are connected to the first annular cavity 41, and the nozzles 43 are rotatably matched with the bottom of the fixed seat 40. The piston 16 is provided with circular through holes at positions corresponding to the nozzles 43, and the nozzles 43 pass through the through holes on the piston 16, and the lower ends extend to below the piston 16.

[0050] The nozzles 43 are all connected to the first annular cavity 41, so that the water in the first annular cavity 41 can be sprayed out from the nozzles 43. The nozzles 43 have multiple spray holes 46, wherein the spray holes 46 have three directions. The bottom of the nozzle 43 has a spray hole 46 pointing vertically downward, and the outer wall of the nozzle 43 is evenly provided with multiple spray holes 46 pointing horizontally and obliquely upward along its circumference (such as Figure 6 as shown).

[0051] A second convex block 44 is provided on the outer wall of the nozzle 43, and a second driving groove 45 is provided on the inner wall of the hole on the piston 16. The second convex block 44 is located in the second driving groove 45, so that when the nozzle 43 moves up and down, the nozzle 43 itself can be forced to rotate.

[0052] When it is necessary to clean the inside of the device, first press the connecting rod 38 downward to connect the water hole 31 with the connecting hole 32, and then press the pressure rod 15 downward. The pressure rod 15 can drive the rotating ring 34 to rotate, thereby pushing the water in the water tank 30 to be discharged from the connecting rod 38 into the first annular cavity 41. The water in the first annular cavity 41 will enter different nozzles 43. As the pressure rod 15 drives the piston 16 and the fixed seat 40 to descend, the nozzle 43 will continuously spray water outward. The vertical downward spray hole 46 at the bottom of the nozzle 43 can spray water downward to continuously wash the bottom of the cylinder 10. The horizontal spray hole 46 on the nozzle 43 can wash the surrounding wall of the cylinder 10 as the nozzle 43 descends. The spray hole 46 on the nozzle 43 facing obliquely upward can wash the bottom wall of the piston 16. During the descent of the piston 16, the water remaining on the inner wall of the cylinder 10 can be scraped downward to further ensure the cleaning effect of the inner wall of the cylinder 10.

[0053] When the pressure rod 15 drives the piston 16 and the fixing seat 40 to descend to the bottom, the nozzle 43 abuts against the bottom, thereby forcing the nozzle 43 to move upward, and the second protrusion 44 and the second driving groove 45 force the nozzle 43 to rotate, so the nozzle 43 is forced to move upward and rotate at the same time. At this time, the nozzle hole 46 of the nozzle 43 facing obliquely upward increases and rotates, which can increase the flushing area of ​​the bottom wall of the piston 16 and further improve the cleaning effect of the bottom wall of the piston 16. Until the bottom of the nozzle 43 is flush with the bottom of the piston 16, the horizontal nozzle hole 46 and the nozzle hole 46 facing obliquely upward on the nozzle 43 are blocked, and the flushing water will be discharged from the drain pipe 17.

[0054] Continue to refer Figure 2, Figure 5 , Figure 7 The second cleaning module is used to wash the peripheral wall of the lower chamber in the cylinder 10 and the outer peripheral wall of the piston 16.

[0055] The second cleaning module includes a rotating seat 50 , a telescopic tube 58 , a sliding block 54 and a flushing hole 55 .

[0056] The upper surface of the piston 16 is rotatably matched with a rotating seat 50, and the two are connected by a torsion spring. The rotating seat 50 is annular and is located outside the fixed seat 40. The outer diameter of the rotating seat 50 is the same as the diameter of the piston 16, so the outer peripheral wall of the rotating seat 50 is slidably matched with the inner wall of the upper chamber of the cylinder 10.

[0057] A third protrusion 56 is provided on the outer peripheral wall of the rotating seat 50, and a third driving groove 57 is provided on the inner wall of the upper chamber of the cylinder 10. The third driving groove 57 is spirally arranged on the inner wall of the cylinder 10, and the third protrusion 56 is located in the third driving groove 57. When the piston 16 descends, the rotating seat 50 rotates, and the torsion spring on the rotating seat 50 accumulates force.

[0058] like Figure 5 The rotating seat 50 is provided with a second annular cavity 51, and the rotating seat 50 is also provided with a second connecting pipe 52 connected with the second annular cavity 51, and the second connecting pipe 52 is connected with the connecting rod 38. In this embodiment, the second connecting pipe 52 and the connecting rod 38 are connected by a hose (not shown in the figure). The water in the water tank 30 can enter the second annular cavity 51.

[0059] The rotating seat 50 is provided with a plurality of mounting grooves 53 with side openings along its circumference, and the mounting grooves 53 are arranged along the radial direction of the rotating seat 50. A sliding block 54 is slidably connected in the mounting groove 53 through a spring, and the sliding block 54 is a hollow structure. A telescopic tube 58 is connected to the sliding block 54, and the telescopic tube 58 is connected to the second annular cavity 51. Therefore, water in the second annular cavity 51 can enter the interior of the sliding block 54.

[0060] The outer end face of the sliding block 54 is an inclined surface, and a flushing hole 55 is opened on the sliding block 54. The flushing hole 55 includes a horizontal hole located on the inclined surface of the sliding block 54 and a hole inclined toward the center at the bottom of the sliding block 54. When the sliding block 54 extends out of the mounting groove 53, the hole inclined toward the center at the bottom of the sliding block 54 faces the outer wall of the piston 16.

[0061] When the rotating seat 50 descends along the inner wall of the upper chamber of the cylinder 10, the rotating seat 50 rotates, and the torsion spring on the inner rotating seat 50 accumulates force, the outer end of the sliding block 54 contacts the inner wall of the cylinder 10, the sliding block 54 cannot extend out of the installation groove 53, and the flushing hole 55 cannot spray water. When the rotating seat 50 descends into the lower chamber, and the sliding block 54 extends out of the installation groove 53, the third protrusion 56 is separated from the third driving groove 57, so the torsion spring releases the elastic force, driving the rotating seat 50 to rotate, and the horizontal hole on the sliding block 54 sprays water to the side wall of the lower chamber of the cylinder 10 for flushing; the hole at the bottom of the sliding block 54 tilted toward the center sprays water toward the outer wall of the piston 16, which can flush away the debris attached to the outer wall during the downward scraping of the piston 16.

[0062] In this embodiment, the release of the torsion spring on the rotating seat 50 can drive it to rotate one circle. When the piston 16 rises, the inclined surface on the sliding block 54 contacts the step of the cylinder 10, forcing it to slide into the installation groove 53. At the same time, during the rising process, the third protrusion 56 cooperates with the third driving groove 57 to drive the rotating seat 50 to rotate and accumulate force again. When it reaches the top, the torsion spring releases the elastic force, and this cycle continues.

[0063] The third cleaning module is used to wash the filter screen 12 and the bottom of the one-way valve 13 .

[0064] like Figure 5 and Figure 6 The third cleaning module includes a water inlet through hole 60 and a plug 61 .

[0065] A plurality of water inlet holes 60 are arranged circumferentially on the base 11. The water inlet holes 60 are L-shaped, and the horizontal section thereof is connected to the water inlet hole that is arranged on the base 11 and is connected to the cylinder 10. A plug 61 is installed in the vertical section of the water inlet hole 60 to slide up and down through a spring, so as to block the upper end of the water inlet hole 60. The plug 61 is a hollow structure with an open upper end, and a through hole that is connected to the inner side is opened on the peripheral wall of the plug 61.

[0066] The upper end of the plug 61 exceeds the upper surface of the base 11, and each plug 61 is arranged one by one with the nozzle 43. When the nozzle 43 descends to the bottom, the plug 61 will be pressed downward first. After the plug 61 is pressed downward, the nozzle 43 will be forced to rise only when it contacts the base 11. It is particularly noted that the elastic force of the spring on the fixing seat 40 is greater than the elastic force of the spring on the plug 61.

[0067] The spray hole 46 at the bottom of the nozzle 43 vertically downward will spray water to the inside of the plug 61, and then flow into the water inlet through hole 60 from the through hole on the side wall. The connection between the water inlet through hole 60 and the water inlet hole set in the base 11 has a water outlet hole 62. It is particularly emphasized that the water outlet hole 62 has an upward inclination toward the bottom of the one-way valve 13 and a downward inclination toward the filter screen 12. The water sprayed from the water outlet hole 62 on the water inlet through hole 60 will rush to the one-way valve 13 and the filter screen 12, which can flush the one-way valve 13 cleanly, and at the same time, flush the debris in the filter hole of the filter screen 12 downward, further improving the flushing effect of the device, and preventing the impurities attached to the filter screen 12 and the one-way valve 13 from affecting the sampling results.

[0068] The fourth cleaning module is used to flush the drain pipe 17 .

[0069] like Figure 5 and Fig. 9 The fourth cleaning module includes a cleaning pipe 70 installed on the piston 16. The cleaning pipe 70 is in an L-shaped structure. The piston 16 is provided with a groove for installing the cleaning pipe 70. The groove runs through the side wall of the piston 16 in the horizontal direction. The opening of the horizontal section of the cleaning pipe 70 faces the side wall of the piston 16. The vertical section of the cleaning pipe 70 extends to the top of the piston 16. The vertical section is slidably matched with the fixing seat 40, and the vertical section of the cleaning pipe 70 is connected to the first annular cavity 41 on the fixing seat 40. The water in the first annular cavity 41 can be sprayed out through the cleaning pipe 70.

[0070] The vertical section of the cleaning pipe 70 is slidably matched with the fixing seat 40, so that when the nozzle 43 drives the fixing seat 40 to slide upward, the cleaning pipe 70 can remain stationary.

[0071] It is particularly noted that when the piston 16 descends to the bottom, the horizontal section of the cleaning pipe 70 faces the drain pipe 17, so that the inside of the drain pipe 17 can be flushed to wash away impurities attached to the inside of the drain pipe 17, which can further improve the cleaning effect.

[0072] That is to say, when cleaning, you only need to press the pressure rod 15 downward. When the pressure rod 15 moves to the bottom, the water source provided by the water tank 30 can be used to flush the side walls of the upper chamber of the cylinder 10, the bottom surface of the piston 16, the bottom of the cylinder 10, the peripheral wall of the lower chamber of the cylinder 10, the outer peripheral wall of the piston 16, the filter screen 12, the bottom of the one-way valve 13 and the drain pipe 17 through the first cleaning module, the second cleaning module, the third cleaning module and the fourth cleaning module respectively. The flushing of the device can be completed efficiently and quickly, thereby improving work efficiency and saving manpower.

[0073] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A surface water sampling device, comprising: A cylinder, a one-way valve and a drain pipe arranged at the bottom of the cylinder, a pressure rod elastically slidably connected to the cylinder, and a piston arranged on the pressure rod, characterized in that the cylinder has two upper and lower chambers, the diameter of the lower chamber is larger than the diameter of the upper chamber, and the cylinder is also provided with a first cleaning module, a second cleaning module and a water tank; The first cleaning module includes a fixed seat connected to the piston by a spring vertical sliding, a first annular cavity provided on the fixed seat and connected to the water tank, and a plurality of nozzles rotating on the fixed seat and connected to the first annular cavity. The piston is provided with a through hole for the nozzle to pass through. The nozzle has nozzles in three directions: vertically downward, horizontally and obliquely upward. The inner wall of the through hole is provided with a first transmission assembly. When the nozzle abuts against the bottom of the cylinder, the nozzle is forced to rotate and slide upward through the first transmission assembly. The second cleaning module includes a swivel seat which is rotatably connected to the piston through a torsion spring and slidingly cooperates with the inner wall of the upper chamber, a second annular cavity arranged on the swivel seat and connected to the water tank, and a sliding block which is radially slidably connected to the swivel seat through a spring, the moving end of the sliding block is an inclined surface, and the sliding block is provided with a plurality of flushing holes which are connected to the second annular cavity, the flushing holes having two flushing directions: horizontally and toward the side wall of the piston after sliding out of the swivel seat, and a second transmission assembly is provided on the inner wall of the upper chamber so that the swivel seat rotates when descending along the upper chamber to store force for the torsion spring.

2. A surface water sampling device according to claim 1, characterized in that: The water tank is provided with an opening and closing component for controlling the water supply switch, and the opening and closing component includes a vertically penetrating channel opened on the water tank, a connecting hole connected to the water tank is provided near the bottom of the channel, a connecting rod is slidably engaged up and down in the channel, and the connecting rod is a hollow structure with an open bottom, and a water hole connected to the interior of the connecting rod is provided on the side wall of the connecting rod.

3. A surface water sampling device according to claim 1, characterized in that: The first transmission assembly includes a second driving groove formed on the inner wall of the through hole, the second driving groove is spirally arranged on the inner wall of the through hole, a second protrusion is arranged on the nozzle, and the second protrusion is located in the second driving groove.

4. A surface water sampling device according to claim 1, characterized in that: The second transmission assembly includes a third driving groove opened on the inner wall of the upper chamber, the third driving groove is spirally arranged on the inner wall of the upper chamber, a third protrusion is arranged on the rotating seat, and the third protrusion is located in the third driving groove.

5. A surface water sampling device according to claim 1, characterized in that: A partition is arranged in the water tank, a swivel is sealed and rotatably installed on the water tank, a first protrusion is arranged on the inner wall of the swivel, a first driving groove is arranged on the outer wall of the pressure rod, an extrusion plate is fixedly installed on the swivel, and the extrusion plate is slidably matched with the inner wall of the water tank.

6. A surface water sampling device according to claim 1, characterized in that: The sliding block is a hollow structure, and a telescopic tube is connected to the sliding block, and the telescopic tube is connected to the second annular cavity.

7. A surface water sampling device according to any one of claims 1 to 6, characterized in that: A water inlet hole which passes through up and down is provided at the center position of the bottom of the cylinder, a filter is fixedly installed at the bottom of the water inlet hole, a one-way valve is located above the water inlet hole, and a plurality of water inlet through holes are circumferentially arranged on the base, the water inlet through hole is in an L-shaped structure, a horizontal section of which is connected with the water inlet hole, and a vertical section of which is connected with the inside of the cylinder, and a plug is installed in the vertical section by a spring for sliding up and down, the inner side of the plug is hollow and the upper end is open, and a through hole is provided on the peripheral wall of the plug, and the plug is correspondingly arranged above and below the nozzle, and a water outlet hole is provided at the connection between the water inlet through hole and the water inlet hole, and the water outlet hole has two directions: upwardly inclined toward the one-way valve and downwardly inclined toward the filter.

8. A surface water sampling device according to claim 7, characterized in that: An L-shaped cleaning pipe is installed on the piston. The vertical section of the cleaning pipe extends above the piston. The vertical section slides with the fixed seat and is connected to the first annular cavity on the fixed seat. When the piston descends to the bottom, the opening of the horizontal section of the cleaning pipe faces the drain pipe.

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