Hydrological sampling bottle cleaning device

Abstract

The invention belongs to the technical field of hydrological testing, and discloses a hydrological sampling bottle cleaning device which comprises a device box. The sewage tank is fixedly arranged on the inner wall of the device tank, the clear water tank is fixedly arranged on the inner wall of the bottom of the sewage tank, the fixing rod is fixedly arranged on the inner wall of the sewage tank, the water guide cover is fixedly arranged on the fixing rod, and the pressing water pumping and scrubbing assembly is arranged on the water guide cover. During downward pressing, on the basis of double-degree-of-freedom coupling of spiral transmission and piston reciprocating motion, a brush cylinder is synchronously triggered to rotate and spray water flow, bristles I and bristles II are synchronously triggered to brush the bottle wall and the bottle bottom, and a water flow spraying shear force field is combined for flushing, so that the efficiency bottleneck of traditional step-by-step cleaning is broken through; a liquid-gas double-effect treatment system is arranged in the device, a gas blowing mode is automatically switched after cleaning liquid is used up, and closed-loop treatment of liquid cleaning and gas blowing is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrological testing, and in particular relates to a hydrological sampling bottle cleaning device. Background Art

[0002] Hydrological survey is a general term for various technical works to collect and organize hydrological data. In a narrow sense, hydrological survey refers to the observation of hydrological elements. Hydrological survey is used to obtain data on various hydrological elements, which are then analyzed, calculated and integrated for the evaluation and rational development and utilization of water resources.

[0003] Hydrological sampling bottles are important tools for collecting water samples for water quality analysis. The accuracy and reliability of water samples are directly related to the correctness of hydrological monitoring results. Therefore, before sampling water, it is necessary to ensure the cleanliness of the sampling bottles to prevent cross contamination. Traditional sampling bottle cleaning methods usually include manual scrubbing, chemical cleaning, and ultrasonic cleaning, but this method has the following defects: (1) Traditional cleaning devices are inconvenient to carry, and the sampling bottles can only be taken to the sampling site after cleaning. If the sampling bottles are contaminated during the carrying process, it will cause errors in the sampling data; (2) The traditional cleaning method is relatively complicated and requires multiple steps and tools to complete the cleaning work. It is necessary to prepare brushes, detergents, clean water, etc., and then manually scrub the sampling bottles. The process is time-consuming and laborious. In addition, due to the need for manual operation, it is difficult to ensure that each bottle can be cleaned evenly and thoroughly. (3) After the traditional cleaning method is completed, the bottle usually needs to be transferred to a drying device for drying. However, during the transfer process, the sampling bottle will be exposed to dust, bacteria or other contaminants in the external environment, increasing the risk of sample contamination.

[0004] Therefore, a hydrological sampling bottle cleaning device that is compact, portable, easy to operate and has integrated multi-functions is needed to solve the above problems. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a hydrological sampling bottle cleaning device, which innovatively realizes a single-operation dual-effect processing mechanism through an integrated cleaning system and a composite drive principle: when pressed downward, based on the dual-degree-of-freedom coupling of spiral transmission and piston reciprocating motion, the brush barrel rotation and water jetting are synchronously triggered, and bristles one and bristles two brush the bottle wall and bottle bottom, combined with the water jet shear force field flushing, breaking through the efficiency bottleneck of traditional step-by-step cleaning. The device has a built-in liquid-gas dual-effect processing system, which automatically switches to air blowing mode after the cleaning liquid is exhausted, realizing the closed-loop processing of "liquid washing-air blowing". The unique foldable brush barrel structure uses the tension difference of double tension springs and the guide telescopic frame to enable the bristle assembly to pass through the narrow mouth in a folded state, and automatically unfold and fit the wide bottom curved surface after entering the bottle bottom, thereby solving the cleaning problem of bottle mouth and bottle bottom with different diameters.

[0006] The technical solution adopted by the present invention is as follows: A hydrological sampling bottle cleaning device includes a device box, and also includes a sewage tank fixedly arranged on the inner wall of the device box, a clean water tank fixedly arranged on the inner wall of the bottom of the sewage tank, a fixed rod fixedly arranged on the inner wall of the sewage tank, a water guide cover fixedly arranged on the fixed rod, and a pressing, pumping and brushing assembly arranged on the water guide cover, the pressing, pumping and brushing assembly includes a fixed plate fixedly arranged on the upper wall of the water guide cover, a rotating brushing unit arranged on the fixed plate, and a folding bottle bottom brushing unit arranged on the rotating brushing unit. The inner wall of the device box is provided with a central clamping unit, and the water guide cover can prevent the cleaning liquid from splashing and guide the waste liquid to flow to the sewage tank.

[0007] As a preferred technical solution of this scheme, the rotary brushing unit includes a water pumping cylinder fixedly arranged on the lower wall of the fixed plate, a spiral cylinder spirally arranged in the fixed plate through a spiral groove, a piston 1 fixedly arranged at the lower end of the spiral cylinder, a tension spring 1 with two ends respectively arranged between the fixed plate and the piston 1, a one-way valve 2 fixedly arranged on the outer wall of the bottom of the water pumping cylinder, a one-way valve 1 fixedly arranged on the upper end of the spiral cylinder, and a brush cylinder fixedly arranged on the one-way valve 1, the circumferential outer wall of the spiral cylinder is provided with a spiral groove, and the spiral cylinder is spirally connected to the fixed plate through the spiral groove, The lower end of the brush cylinder is connected with the water outlet of the one-way valve, the upper end of the spiral cylinder is connected with the water inlet of the one-way valve, the side wall of the brush cylinder is provided with water spray holes in a linear array, the water inlet of the one-way valve is connected with the inside of the clean water tank, the water outlet of the one-way valve is connected with the inside of the pumping cylinder, a through hole is provided in the piston, the one-way valve is located in the clean water tank, the one-way valve can prevent the backflow of the cleaning liquid sucked into the pumping cylinder, and the one-way valve can prevent air from entering the spiral cylinder from the water spray hole when the piston moves upward.

[0008] As a preferred technical solution of the present scheme, the foldable bottle bottom cleaning unit comprises an ear seat fixedly arranged on the upper end of the brush cylinder, a connecting rod 1 hingedly arranged in the ear seat at one end, a connecting rod 2 hingedly arranged at the free end of the connecting rod 1, and a guide telescopic frame vertically fixedly arranged on the upper wall of the ear seat, the free end of the connecting rod 2 is hingedly connected to the upper end of the guide telescopic frame, a tension spring 2 is fixedly arranged between the end heads of the connecting rod 1 on both sides, the connection between the tension spring 2 and the connecting rod 1 is located at the hinge point of the connecting rod 1 and the connecting rod 2, the connecting rod 1 and the connecting rod 2 are each provided with two groups, a rubber block is rotatably arranged on the upper end of the guide telescopic frame, the two groups of the connecting rod 1 and the connecting rod 2 are extremely symmetrically arranged along the central axis of the rubber block, the two groups of the connecting rod 1 and the connecting rod 2 are staggered and do not affect each other, the rubber block contacts with the bottle bottom, avoiding the rigid contact between the upper end of the guide telescopic frame and the bottle bottom causing scratches on the bottle bottom, the tension spring 2 can control the connecting rod 1 and the connecting rod 2 to be in a folded state in the initial state, so as to facilitate the foldable bottle bottom cleaning unit to enter the bottle smoothly.

[0009] The cam is an air filter that is fixedly mounted on the cam and is adapted to move the air filter housing, the air filter housing being arranged on a camshaft and being adapted to move the air filter housing towards the camshaft.

[0010] As a preferred technical solution of this scheme, a V-shaped clamp is fixedly provided at the output end of the cylinder, and a rubber pad is fixedly provided on one side wall of the V-shaped clamp. The V-shaped clamp is used to achieve center clamping of the bottle body, and the rubber pad can increase the clamping friction to prevent the bottle body from sliding.

[0011] As a preferred technical solution of this scheme, bristles one are fixedly provided on the outer wall of the brush tube, and bristles two are fixedly provided on one side wall of the connecting rod two. Brush one corresponds to the inner wall of the hydrological sampling bottle, and bristles two correspond to the inner bottom wall of the hydrological sampling bottle.

[0012] As a preferred technical solution of the present invention, the piston 1 is in close contact with the inner wall of the spiral cylinder, and the tension spring 1 is located outside the spiral cylinder.

[0013] As a preferred technical solution of this scheme, a water adding pipe is fixedly provided through the side wall of the device box, and one end of the water adding pipe passes through a clean water tank. The clean water tank is used to store cleaning fluid, and the cleaning fluid is replenished through the water adding pipe.

[0014] As a preferred technical solution of this scheme, a drain pipe is fixedly provided on the side wall of the sewage tank, and a drain valve is fixedly provided on one end of the drain pipe located outside the sewage tank. The drain pipe and the drain valve are used to discharge waste liquid in the sewage tank.

[0015] As a preferred technical solution of this scheme, the tension of the tension spring 1 is greater than the tension of the tension spring 2.

[0016] After adopting the above structure, the beneficial effects of the present invention are as follows: (1) Through the integrated cleaning system and compound drive principle, the storage structure, drive structure and scrubbing structure are integrated in the device box. When pressed down, based on the dual-degree-of-freedom motion principle of spiral transmission and piston reciprocating motion, the rotation of the spiral barrel and the linear motion of piston 1 are synchronously triggered: the spiral barrel drives the brush barrel to rotate, so that bristles 1 and 2 perform gradient scrubbing on the bottom and wall of the bottle; at the same time, the compression of piston 1 generates water flow, which is quickly sprayed through the water spray hole, combined with the rotation of the brush barrel to form a shear force field, and dynamic flushing is completed synchronously during the scrubbing process. This device completely solves the inefficiency problem caused by the multi-step operation of traditional cleaning equipment through a single-operation dual-effect processing mechanism. Repeated pressing can complete the coordinated operation of "scrubbing, rinsing, and air drying"; (2) Based on the tension difference of the double tension springs and the principle of spiral transmission, the horizontal displacement of the second connecting rod and the rotation of the spiral barrel cause the bristles one and two to brush the bottle wall and the bottom of the bottle respectively; (3) When the cleaning liquid in the clean water tank is exhausted, continue to press repeatedly to trigger the piston to reciprocate, and use air to spray the inner wall of the sampling bottle to achieve the integrated function of "liquid washing and air blowing" in the cleaning process. After the brushing is completed, it will automatically switch to the air drying mode, and the residual liquid film on the inner wall of the bottle will be swept by the air flow. Combined with the centrifugal force field generated by the rotation of the brush barrel, it ensures that the sampling bottle can be directly used for on-site sampling after cleaning without the need for additional storage protection; (4) Simple operation, which solves the technical defects of traditional cleaning equipment that requires multiple steps and relies on professionals, and realizes the "ready-to-use" operation mode, which is suitable for field emergency monitoring scenarios, so that non-professionals can also quickly complete equipment debugging and water sample collection preparation; (5) A foldable brush cylinder structure and an adaptive connecting rod mechanism are used. When the foldable bottle bottom brushing unit is inserted into the bottle body, the guide telescopic frame is in an extended state due to the tension of the tension spring 2, and passes through the narrow bottleneck in a folded state; after entering the bottle bottom, the guide telescopic frame contracts and drives the connecting rod 2 to expand horizontally to a horizontal angle, so that the bristles 2 fit the curved surface of the bottle bottom. This composite mechanism of flexible folding and rigid brushing breaks through the technical bottleneck that the sampling bottle cannot be adapted due to the flat bottom and different bottle mouth diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present solution and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of a hydrological sampling bottle cleaning device proposed by the present invention; Figure 2 A cross-sectional view of the clean water tank connection structure proposed by the present invention; Figure 3 A cross-sectional view of the water pump connection structure proposed by the present invention; Figure 4 This is a schematic diagram of the spiral cylinder connection structure proposed by the present invention; Figure 5 A cross-sectional view of the center clamping unit connection structure proposed by the present invention; Figure 6 This is a schematic diagram of the overall structure of the foldable bottle bottom cleaning unit proposed in the present invention.

[0019] In the attached drawings: 1, device box; 2, sewage tank; 3, clean water tank; 4, one-way valve 2; 5, water guide cover; 6, mounting frame; 7, drain pipe; 8, drain valve; 9, fixing plate; 10, press-pump water brushing assembly; 11, foldable bottle bottom brushing unit; 12, rotating brushing unit; 13, water pumping cylinder; 14, piston 1; 15, spiral cylinder; 16, tension spring 1; 17, one-way valve 1; 18, water spray hole; 19, brush cylinder; 20, bristle 1; 21, center clamping unit 1. Yuan; 22. Water supply pipe; 23. Ear seat; 24. Guide telescopic frame; 25. Connecting rod one; 26. Connecting rod two; 27. Brush two; 28. Rubber block; 29. ​​Tension spring two; 30. Load-bearing plate; 31. Air storage cylinder; 32. Piston two; 33. Electric push rod; 34. Rubber pad; 35. Connecting frame; 36. Transmission pipe; 37. Cylinder; 38. V-shaped clamp; 39. Fixed rod; 40. Through hole; 41. Reset telescopic rod; 42. Reset spring; 43. Spiral groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described 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; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0022] like Figure 1-Figure 6As shown, a hydrological sampling bottle cleaning device comprises a device box 1, and also comprises a sewage tank 2 fixedly arranged on the inner wall of the device box 1, a clean water tank 3 fixedly arranged on the inner wall of the bottom of the sewage tank 2, a fixing rod 39 fixedly arranged on the inner wall of the sewage tank 2, a water guide cover 5 fixedly arranged on the fixing rod 39, and a pressing and pumping water brushing assembly 10 arranged on the water guide cover 5, wherein the pressing and pumping water brushing assembly 10 comprises a fixing plate 9 fixedly arranged on the upper wall of the water guide cover 5, a rotating brushing unit 12 arranged on the fixing plate 9, and a folding bottle bottom brushing unit 11 arranged on the rotating brushing unit 12, a central clamping unit 21 is arranged on the inner wall of the device box 1, a drain pipe 7 is fixedly arranged through the side wall of the sewage tank 2, a drain valve 8 is fixedly arranged at one end of the drain pipe 7 located on the outer side of the sewage tank 2, a water supply pipe 22 is fixedly arranged through the side wall of the device box 1, and one end of the water supply pipe 22 passes through the clean water tank 3.

[0023] The rotary brushing unit 12 includes a water pumping cylinder 13 fixedly arranged on the lower wall of the fixed plate 9, a spiral cylinder 15 spirally arranged in the fixed plate 9, a piston 14 fixedly arranged at the lower end of the spiral cylinder 15, a tension spring 16 with two ends respectively arranged between the fixed plate 9 and the piston 14, a one-way valve 24 fixedly arranged on the outer wall of the bottom of the water pumping cylinder 13, a one-way valve 17 fixedly arranged on the upper end of the spiral cylinder 15, and a brush cylinder 19 fixedly arranged on the one-way valve 17. The outer wall of the spiral cylinder 15 is provided with a spiral groove 43, and the spiral cylinder 15 is spirally connected to the fixed plate 9 through the spiral groove 43. The lower end of the brush cylinder 19 is connected with the water outlet of the one-way valve 17, the upper end of the spiral cylinder 15 is connected with the water inlet of the one-way valve 17, the side wall of the brush cylinder 19 is penetrated by a linear array of water spray holes 18, the water inlet of the one-way valve 24 is connected with the inside of the clean water tank 3, the water outlet of the one-way valve 24 is connected with the inside of the pumping cylinder 13, the piston 14 is penetrated by a through hole 40, the one-way valve 24 is located in the clean water tank 3, the piston 14 is in close contact with the inner wall of the spiral cylinder 15, and the tension spring 16 is located outside the spiral cylinder 15.

[0024] The foldable bottle bottom brushing unit 11 includes an ear seat 23 fixedly arranged at the upper end of the brush cylinder 19, a connecting rod 25 with one end hingedly arranged in the ear seat 23, a connecting rod 26 with one end hingedly arranged at the free end of the connecting rod 25, and a guide telescopic frame 24 vertically fixedly arranged on the upper wall of the ear seat 23, the free end of the connecting rod 26 is hinged to the upper end of the guiding telescopic frame 24, and a tension spring 29 is fixedly arranged between the ends of the connecting rod 25 on both sides, and the connection between the tension spring 29 and the connecting rod 25 is located at the hinge point of the connecting rod 25 and the connecting rod 26, the tension of the tension spring 16 is greater than the tension of the tension spring 29, and the connecting rod 26 is fixedly arranged between the ends of the connecting rod 25 on both sides. There are two groups of rod one 25 and connecting rod two 26. A rubber block 28 is rotatably provided on the upper end of the guide telescopic frame 24. The two groups of connecting rod one 25 and connecting rod two 26 are extremely symmetrically arranged along the central axis of the rubber block 28. The two groups of connecting rod one 25 and connecting rod two 26 are staggered and do not affect each other. The rubber block 28 contacts the bottom of the bottle to avoid scratches on the bottom of the bottle caused by rigid contact between the upper end of the guide telescopic frame 24 and the bottom of the bottle. The outer wall of the brush tube 19 is fixed with bristles one 20, and one side wall of the connecting rod two 26 is fixed with bristles two 27. The bristles one 20 correspond to the inner side wall of the hydrological sampling bottle, and the bristles two 27 correspond to the inner bottom wall of the hydrological sampling bottle.

[0025] The central clamping unit 21 includes a supporting plate 30 fixedly arranged on the inner wall of one side of the device box 1, an air cylinder 31 fixedly arranged on the upper wall of the supporting plate 30, a connecting frame 35 fixedly arranged on the outer edge of the upper side of the air cylinder 31, an electric push rod 33 fixedly arranged on the connecting frame 35 vertically, a piston 2 32 fixedly arranged on the output end of the electric push rod 33, a reset telescopic rod 41 fixedly arranged on the upper wall of a fixed rod 39 vertically, a cylinder 37 fixedly arranged on the upper end of the reset telescopic rod 41, and two ends of the cylinder 37 fixedly connected to the outer wall of the cylinder 37 and the fixed rod 39. A return spring 42 is provided between the upper walls of the rod 39, and the return spring 42 is located on the outside of the return telescopic rod 41. The cylinder 37 is vertically slidably arranged on the inner wall of the device box 1. A transmission pipe 36 is connected between the base end of the cylinder 37 and the air cylinder 31. The connection between the transmission pipe 36 and the air cylinder 31 is located on the lower side of the side wall of the air cylinder 31. The piston 2 32 is in close contact with the inner wall of the air cylinder 31. A V-shaped clamp 38 is fixedly provided at the output end of the cylinder 37, and a rubber pad 34 is fixedly provided on one side wall of the V-shaped clamp 38.

[0026] When in use, in the initial state, due to the elastic effect of the reset spring 42, the reset telescopic rod 41 remains in a stretched state, so that the cylinder 37 is located at the top end of its lifting stroke; at the same time, under the action of the tension spring 16, the piston 14 is pulled to the highest point of its stroke; in addition, due to the tension of the tension spring 29, the connecting rod 1 25 and the connecting rod 2 26 are in a nearly vertical state, and the guide telescopic frame 24 is also located at the top end of its stroke; First, the cleaning liquid is poured into the clean water tank 3 from the water supply pipe 22, the sampling bottle to be cleaned is inverted and put on the outside of the brush tube 19, at this time, the inner wall of the bottle bottom contacts the rubber block 28, and then the electric push rod 33 is started, and the electric push rod 33 drives the piston 2 32 to move downward. At this time, the gas in the gas storage cylinder 31 enters the cylinder 37 through the transmission pipe 36, and the cylinder 37 stretches, thereby driving the V-shaped clamping plates 38 on both sides to clamp the sampling bottle to be cleaned in the center; Then the user manually presses the hydrological sampling bottle downward, and the guide telescopic frame 24 begins to shrink. Since the tension of the tension spring 16 is greater than the tension of the tension spring 29, the tension spring 29 is stretched first, and drives the connecting rods 26 on both sides to move toward the horizontal direction, so that the bristles 27 are close to the inner wall of the bottom of the bottle; Continue to press the sampling bottle downward, the tension spring 16 is gradually stretched, the spiral barrel 15 moves downward accordingly, and rotates itself during the downward movement, the spiral barrel 15 drives the brush barrel 19 to rotate, so that the bristles 1 20 and the bristles 27 rotate and scrub the side walls and top walls of the sampling bottle, and at the same time, the piston 14 is pushed downward by the spiral barrel 15, and the air in the water pump 13 is squeezed by the piston 14, and then enters the spiral barrel 15 from the through hole 40, and then enters the brush barrel 19 from the one-way valve 17, and finally is discharged from the water spray hole 18, and then the sampling bottle is released, and the tension spring 16 pulls the piston 14 upward, and during the upward movement of the piston 14, the cleaning liquid in the clean water tank 3 is sucked into the water pump 13 through the one-way valve 24; Press the sampling bottle again, the cleaning liquid in the water pump 13 will flow through the through hole 40, the spiral cylinder 15, the one-way valve 17 and the brush cylinder 19, and finally spray out from the water spray hole 18, so that the cleaning liquid can be sprayed during the process of brushing the inner wall of the sampling bottle by the bristles 1 20 and the bristles 2 27. Repeat the above operation several times to realize the rapid brushing of the sampling bottle; When the cleaning liquid in the clean water tank 3 is sprayed out, the user continues to press manually repeatedly, and the air will be sucked into the water pump 13. Similarly, the air will pass through the through hole 40, the spiral cylinder 15, the one-way valve 17 and the brush cylinder 19 in sequence, and finally be sprayed out from the water spray hole 18, thereby achieving the air-drying effect on the inner wall of the sampling bottle. The device is small in size and easy to carry, ensuring that the bottle is always kept clean and free of impurities during multiple sampling processes.

[0027] In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creatively designing without departing from the purpose of the invention, they should all fall within the scope of protection of the invention.

Claims

1. A hydrological sampling bottle cleaning device, comprising a device box (1), characterized in that: It also comprises a sewage tank (2) fixedly arranged on the inner wall of the device box (1), a clean water tank (3) fixedly arranged on the inner wall of the bottom of the sewage tank (2), a fixing rod (39) fixedly arranged on the inner wall of the sewage tank (2), a water guide cover (5) fixedly arranged on the fixing rod (39), and a pressing water pumping brushing assembly (10) arranged on the water guide cover (5); the pressing water pumping brushing assembly (10) comprises a fixing plate (9) fixedly arranged on the upper wall of the water guide cover (5), a rotating brushing unit (12) arranged on the fixing plate (9), and a foldable bottle bottom brushing unit (11) arranged on the rotating brushing unit (12); and a centering clamping unit (21) is provided on the inner wall of the device box (1).

2. A hydrological sampling bottle cleaning device according to claim 1, characterized in that: The rotary brushing unit (12) comprises a water pumping cylinder (13) fixedly mounted on the lower wall of a fixed plate (9), a spiral cylinder (15) spirally mounted in the fixed plate (9), a piston (14) fixedly mounted at the lower end of the spiral cylinder (15), a tension spring (16) with two ends respectively mounted between the fixed plate (9) and the piston (14), a check valve (4) fixedly mounted on the outer wall of the bottom of the water pumping cylinder (13), a check valve (17) fixedly mounted on the upper end of the spiral cylinder (15), and a brush cylinder (19) fixedly mounted on the check valve (17).

3. A hydrological sampling bottle cleaning device according to claim 2, characterized in that: The lower end of the brush cylinder (19) is connected to one end of the one-way valve (17), the upper end of the spiral cylinder (15) is connected to the other end of the one-way valve (17), and a through hole (40) is provided in the piston (14).

4. A hydrological sampling bottle cleaning device according to claim 3, characterized in that: The foldable bottle bottom cleaning unit (11) comprises a connecting rod (25) symmetrically hingedly arranged on the upper end of the brush cylinder (19), a connecting rod (26) hingedly arranged at one end on the free end of the connecting rod (25), and a guide telescopic frame (24) vertically fixedly arranged on the upper end of the brush cylinder (19).

5. A hydrological sampling bottle cleaning device according to claim 4, characterized in that: The free end of the second connecting rod (26) is hinged to the upper end of the guide telescopic frame (24), and a tension spring (29) is fixedly provided between the ends of the first connecting rod (25) on both sides, and the connection between the second tension spring (29) and the first connecting rod (25) is located at the hinge point of the first connecting rod (25) and the second connecting rod (26).

6. A hydrological sampling bottle cleaning device according to claim 5, characterized in that: The centering clamping unit (21) comprises an air storage cylinder (31) arranged on the inner wall of the device box (1), a second piston (32) movably arranged in the air storage cylinder (31), a reset telescopic rod (41) vertically fixedly arranged on the upper wall of the fixed rod (39), a cylinder (37) fixedly arranged on the upper end of the reset telescopic rod (41), and a reset spring (42) whose two ends are respectively fixedly connected between the outer wall of the cylinder (37) and the upper wall of the fixed rod (39).

7. A hydrological sampling bottle cleaning device according to claim 6, characterized in that: The base end of the cylinder (37) is connected to the gas storage cylinder (31) via a pipeline.

8. A hydrological sampling bottle cleaning device according to claim 7, characterized in that: The tension of the tension spring 1 (16) is greater than the tension of the tension spring 2 (29).

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