Sand-containing water sample sampling device for water conservancy project

Abstract

The invention belongs to the technical field of hydraulic engineering, and discloses a sand-containing water sample sampling device for hydraulic engineering, which comprises a sampling rod, the sampling bottle is fixedly mounted on one side of the top of the sampling rod; the top of the sampling bottle is sleeved with the sampling bottle sealing cover in a threaded mode, and a control valve pipe is arranged at the top; the one-way valve set comprises a movable valve column, the movable valve column is movably installed in the control valve pipe, and the middle of the outer side of the control valve pipe is fixedly communicated with a water inlet valve. According to the technical scheme, the water inlet valve and the exhaust valve are arranged, the rope wound on the top of the winding hanging ring is pulled to drive the winding hanging ring and the movable valve column to move upwards as a whole, then the shielding assembly can be opened, gas in the sampling bottle can be discharged in one direction through the exhaust valve, and then after the shielding plates are opened oppositely, gas is discharged. The negative pressure inside the sampling bottle can fill the inside of the sampling bottle with external water through the water inlet valve, and finally air exhaust and water inlet are performed separately, so that the water sampling efficiency is greatly improved, and the problem of low one-way water inlet and air exhaust efficiency is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy projects, and in particular is a sand-containing water sampling device for water conservancy projects. Background Art

[0002] The sand-containing water sampling device used in water conservancy projects refers to a sampler used to accurately evaluate the sediment content and its characteristics in the water body. It is commonly divided into suspended sediment samplers, bed sediment samplers and riverbed sediment samplers. Among them, the most common suspended sediment sampler is the bottle sampler, which is generally composed of a sampling rod, a sampling bottle and a control valve.

[0003] The existing sand-containing water sampling device is used to insert the sampling bottle at the bottom of the sampling rod into the water body, and then use a control valve to open to allow water to seep in. However, the control valve is one-way, so that while the water is entering, the gas in the bottle will produce bubbles that will keep rolling in the bottle. It takes a long time to let the gas completely discharge and fill the bottle with water, which greatly reduces the efficiency of water sampling. Therefore, it needs to be improved. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a sand-containing water sampling device for water conservancy projects, which has the advantage of one-way exhaust before water intake.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sand-containing water sampling device for water conservancy projects, comprising a sampling rod; a sampling bottle, fixedly installed on one side of the top of the sampling rod; a sampling bottle sealing cover, threadedly sleeved on the top of the sampling bottle, and a control valve tube is arranged on the top; a one-way valve group, comprising a movable valve column, the movable valve column is movably installed inside the control valve tube, the middle part of the outer side of the control valve tube is fixedly connected to the water inlet valve, the middle part of the bottom end of the movable valve column is provided with an exhaust valve, and the middle part of the top end of the movable valve column is provided with a winding ring.

[0006] Preferably, the water inlet valve comprises a water inlet pipe, a valve ball and a first connecting spring;

[0007] The water inlet pipe is fixedly connected to the middle part of the outer side of the control valve pipe, the valve ball is movably installed in the inner cavity of the water inlet pipe, and the inner side of the valve ball is elastically connected to the inner cavity of the water inlet pipe through a first connecting spring.

[0008] Preferably, the exhaust valve comprises an exhaust valve column and a second connecting spring;

[0009] The exhaust valve column is movably mounted at the bottom end of the middle part of the movable valve column inner cavity, and the top end of the exhaust valve column is elastically connected to the inner wall of the middle part of the movable valve column through a second connecting spring.

[0010] Preferably, a one-way valve flap located outside the top of the movable valve column is provided inside the top of the control valve tube.

[0011] Preferably, a weight ring block is provided at the top end of the inner cavity of the movable valve column.

[0012] Preferably, a shielding assembly is arranged on the outer side of the top of the movable valve column, and the shielding assembly includes a trigger block, a limit column, a first power spring and a shielding frame;

[0013] The trigger block is movably installed on the outer side of the top of the movable valve column, the limit column is arranged in the movable valve column and is located inside the top of the trigger block, the top of the trigger block is elastically connected to the inner wall of the movable valve column through a first power spring, and the shielding frame is fixedly installed on the inner side of the trigger block, and the top of the shielding frame is opposite to the notch on the outer side of the top of the movable valve column.

[0014] Preferably, the outer side of the trigger block adopts a slope design.

[0015] Preferably, shielding plates located between the sampling bottle and the movable valve column are movably installed on both sides of the bottom of the sampling bottle sealing cover.

[0016] Preferably, a first pneumatic assembly located outside the shielding plate is provided inside the sealing cover of the sampling bottle, and the first pneumatic assembly includes a pneumatic cylinder and a pneumatic rod;

[0017] The pneumatic cylinder is fixedly installed at the bottom of the sampling bottle sealing cover and above the outer side of the shielding plate. The pneumatic rod is movably installed in the inner cavity of the pneumatic cylinder, and the inner end is fixedly connected to the outer side of the top end of the shielding plate.

[0018] Preferably, a second pneumatic assembly located below the outer side of the pneumatic cylinder is provided at the bottom of the sampling bottle sealing cover, and the second pneumatic assembly includes a pneumatic groove, a piston block, a second power spring and a connecting pipe;

[0019] The pneumatic groove is opened at the bottom of the sampling bottle sealing cover and is located below the outside of the pneumatic cylinder. The piston block is movably installed in the inner cavity of the pneumatic groove. The top of the piston block is elastically connected to the inner wall of the pneumatic groove through a second power spring. The pneumatic groove is connected to the outside of the pneumatic cylinder through a connecting pipe.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The above technical scheme sets an inlet valve and an exhaust valve. By pulling the rope wrapped around the top of the winding ring to drive the winding ring and the movable valve column upward as a whole, the shielding assembly can be opened. The gas inside the sampling bottle will be discharged one-way through the exhaust valve first, and then after the shielding plates are opened back to back, the negative pressure inside the sampling bottle can fill the outside water through the water inlet valve, and finally the exhaust and water inlet are separated, thereby greatly improving the water sampling efficiency and avoiding the problem of low efficiency of one-way water inlet and exhaust.

[0022] The present invention provides a limit column and a shielding frame. When the winding lifting ring and the movable valve column are upward as a whole, the top of the control valve tube will squeeze the outer inclined surface of the trigger block, and push the two trigger blocks and the shielding frame as a whole towards each other, thereby releasing the seal on the middle part of the top end of the movable valve column. At this time, since the gas will float in the water, the gas inside the sampling bottle will quickly pass through the middle part of the movable valve column, pushing the exhaust valve column upward until it is completely discharged from the interior of the sampling bottle, thereby achieving the purpose of unidirectional controlled gas discharge.

[0023] The present invention sets a baffle plate, a first pneumatic component and a second pneumatic component. When the gas inside the sampling bottle is completely discharged, the gas at the bottom of the inner cavity of the second pneumatic component will be completely extracted at the same time, and the second pneumatic component will be driven through the first pneumatic component to drive the two baffle plates to move in opposite directions, thereby removing the obstruction on the bottom of the movable valve column. After that, the negative pressure inside the sampling bottle can push the valve ball toward each other and then the water inlet pipe and the movable valve column into the sampling bottle until the water is full. The top water level can assist in pushing the second pneumatic component to reset so that the first pneumatic component drives the baffle plates to move toward each other with negative pressure to block the bottom of the movable valve column, preventing water from continuing to enter, thereby achieving the purpose of controlling the amount of water sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a schematic cross-sectional structure diagram of the one-way valve assembly of the present invention;

[0026] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0027] Figure 4 for Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0028] Figure 5 for Figure 2 A schematic diagram of the local enlarged structure at C in the middle;

[0029] Figure 6 It is a structural schematic diagram of the control valve tube of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the counterweight ring block of the present invention;

[0031] Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at point D in the middle.

[0032] In the figure: 1. sampling rod; 2. sampling bottle; 3. sampling bottle sealing cover; 4. control valve tube; 5. one-way valve group; 501. movable valve column; 502. water inlet valve; 5021. water inlet pipe; 5022. valve ball; 5023. first connecting spring; 503. exhaust valve; 5031. exhaust valve column; 5032. second connecting spring; 6. winding ring; 7. one-way valve disc; 8. counterweight ring block; 9. shielding assembly; 901. touch block; 902. limit column; 903. first power spring; 904. shielding frame; 10. shielding plate; 11. first pneumatic assembly; 1101. pneumatic cylinder; 1102. pneumatic rod; 12. second pneumatic assembly; 1201. pneumatic groove; 1202. piston block; 1203. second power spring; 1204. connecting pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 8 As shown, the present invention provides a sand-containing water sampling device for water conservancy projects, comprising a sampling rod 1; a sampling bottle 2, fixedly installed on one side of the top of the sampling rod 1; a sampling bottle sealing cover 3, threadedly sleeved on the top of the sampling bottle 2, and provided with a control valve tube 4 on the top; a one-way valve group 5, comprising a movable valve column 501, the movable valve column 501 is movably installed inside the control valve tube 4, the middle part of the outer side of the control valve tube 4 is fixedly connected with a water inlet valve 502, the middle part of the bottom end of the movable valve column 501 is provided with an exhaust valve 503, and the middle part of the top end of the movable valve column 501 is provided with a winding ring 6.

[0035] Through the design of the winding ring 6, the rope can be wound and installed on the winding ring 6, and the other end of the top rope is located on the top side of the sampling rod 1. Then, the movable valve column 501 can be driven upward as a whole by pulling the rope wound and installed on the top of the winding ring 6 until it is pulled to the top of the inner cavity of the control valve tube 4, so that the groove on the outer side of the bottom of the movable valve column 501 is opposite to the water inlet valve 502. After the gas in the sampling bottle 2 is discharged through the exhaust valve 503, the water enters the sampling bottle 2 through the water inlet valve 502 for automatic sampling.

[0036] like Figure 2 As shown, the water inlet valve 502 includes a water inlet pipe 5021, a valve ball 5022 and a first connecting spring 5023;

[0037] The water inlet pipe 5021 is fixedly connected to the middle part of the outer side of the control valve pipe 4 , the valve ball 5022 is movably installed in the inner cavity of the water inlet pipe 5021 , and the inner side of the valve ball 5022 is elastically connected to the inner cavity of the water inlet pipe 5021 through the first connecting spring 5023 .

[0038] The above scheme is adopted: by providing a valve ball 5022, when negative pressure is generated inside the sampling bottle 2, the valve ball 5022 can be pulled to move inward until a gap is generated between the valve ball 5022 and the water inlet pipe 5021, so that water can enter the gap between the water inlet pipe 5021 and the valve ball 5022, and when the water inlet pipe 5021 is aligned with the outer notch at the bottom of the movable valve column 501, water can smoothly enter the interior of the sampling bottle sealing cover 3, thereby achieving the purpose of automatic sampling.

[0039] like Figure 3 As shown, the exhaust valve 503 includes an exhaust valve rod 5031 and a second connecting spring 5032;

[0040] The exhaust valve column 5031 is movably installed at the bottom end of the middle part of the inner cavity of the movable valve column 501 , and the top end of the exhaust valve column 5031 is elastically connected to the inner wall of the middle part of the movable valve column 501 through the second connecting spring 5032 .

[0041] The above scheme is adopted: by providing a second connecting spring 5032, the elastic force of the second connecting spring 5032 can push the exhaust valve column 5031 to move downward as a whole, so that the gas inside the sampling bottle 2 can only push the exhaust valve column 5031 to form a gap and be discharged, and no water or gas can enter, thereby achieving the purpose of one-way exhaust.

[0042] like Figure 2 and Figure 7 As shown, a one-way valve flap 7 located outside the top of the movable valve column 501 is arranged inside the top of the control valve tube 4 .

[0043] The above scheme is adopted: by providing a one-way valve flap 7, when the operator pulls the rope to drive the winding eye 6 and the movable valve column 501 upward as a whole, the gas in the gap at the top of the control valve tube 4 will smoothly push the one-way valve flap 7 to open and discharge, thereby avoiding the resistance of this part of the air pressure to the upward pulling of the rope.

[0044] like Figure 2 and Figure 7 As shown, a weight ring block 8 is arranged at the top end of the inner cavity of the movable valve column 501.

[0045] The above scheme is adopted: by providing a counterweight ring block 8, when the counterweight ring block 8 itself has a gravity greater than the water pressure, the operator can loosen the top rope, and the gravity of the counterweight ring block 8 can drive the movable valve column 501 to reset downward as a whole.

[0046] like Figure 5and Figure 8 As shown, a shielding assembly 9 is disposed on the outer side of the top of the movable valve column 501, and the shielding assembly 9 includes a trigger block 901, a limit column 902, a first power spring 903 and a shielding frame 904;

[0047] The trigger block 901 is movably installed on the outer side of the top of the movable valve column 501, the limit column 902 is arranged in the movable valve column 501 and is located inside the top of the trigger block 901, the top of the trigger block 901 is elastically connected to the inner wall of the movable valve column 501 through the first power spring 903, and the shielding frame 904 is fixedly installed on the inner side of the trigger block 901, and the top of the shielding frame 904 is opposite to the groove on the outer side of the top of the movable valve column 501.

[0048] The above scheme is adopted: by providing a shielding frame 904, the elastic force of the first power spring 903 can push the two trigger blocks 901 and the shielding frame 904 to move in opposite directions, so that the top of the shielding frame 904 is opposite to the groove on the outer side of the top of the movable valve column 501 to block and seal.

[0049] like Figure 5 and Figure 8 As shown, the outer side of the trigger block 901 adopts a slope design.

[0050] The above scheme is adopted: through the inclined surface design on the outside of the trigger block 901, when the movable valve column 501 is upward as a whole, the inner wall of the top end of the control valve tube 4 can squeeze and push the outer inclined surface of the trigger block 901, thereby driving the two trigger blocks 901 and the shielding frame 904 to move towards each other as a whole, and a gap can be generated between the top of the shielding frame 904 and the top notch of the movable valve column 501, so that the gas inside the sampling bottle 2 can smoothly push the exhaust valve column 5031 upward, and be discharged through the gap between the top of the shielding frame 904 and the top notch of the movable valve column 501.

[0051] like Figure 3 and Figure 7 As shown, shielding plates 10 located between the sampling bottle 2 and the movable valve column 501 are movably installed on both sides of the bottom of the sampling bottle sealing cover 3.

[0052] By adopting the above solution: by providing a baffle plate 10, the two baffle plates 10 move toward or away from each other, so as to achieve the purpose of shielding and opening the bottom of the movable valve column 501.

[0053] like Figure 4 and Figure 7 As shown, a first pneumatic assembly 11 located outside the shielding plate 10 is disposed inside the sampling bottle sealing cover 3, and the first pneumatic assembly 11 includes a pneumatic cylinder 1101 and a pneumatic rod 1102;

[0054] The pneumatic cylinder 1101 is fixedly installed at the bottom of the sampling bottle sealing cover 3 and above the outer side of the baffle plate 10 . The pneumatic rod 1102 is movably installed in the inner cavity of the pneumatic cylinder 1101 , and the inner end is fixedly connected to the outer side of the top end of the baffle plate 10 .

[0055] By adopting the above solution, the pneumatic cylinder 1101 is provided. When gas enters or is discharged from the outer side of the inner cavity of the pneumatic cylinder 1101, the pneumatic cylinder 1101 can be driven to drive the pneumatic rod 1102 to move toward or away from each other.

[0056] like Figure 4 and Figure 7 As shown, the bottom of the sampling bottle sealing cover 3 is provided with a second pneumatic assembly 12 located below the outer side of the pneumatic cylinder 1101, and the second pneumatic assembly 12 includes a pneumatic groove 1201, a piston block 1202, a second power spring 1203 and a connecting pipe 1204;

[0057] The pneumatic groove 1201 is opened at the bottom of the sampling bottle sealing cover 3 and is located below the outer side of the pneumatic cylinder 1101. The piston block 1202 is movably installed in the inner cavity of the pneumatic groove 1201. The top of the piston block 1202 is elastically connected to the inner wall of the pneumatic groove 1201 through the second power spring 1203. The pneumatic groove 1201 is connected to the outer side of the pneumatic cylinder 1101 through the connecting tube 1204.

[0058] The above scheme is adopted: by providing a piston block 1202, when the gas in the inner cavity of the pneumatic groove 1201 below the piston block 1202 is discharged, the piston block 1202 can be driven to move downward as a whole, so that the inner cavity at the top of the pneumatic groove 1201 generates negative pressure, and the gas in the inner cavity outside the pneumatic cylinder 1101 is extracted through the connecting pipe 1204. When there is water on the top of the piston block 1202, the upward pushing force on its bottom and the pulling force of the second power spring 1203 can drive the piston block 1202 to reset upward as a whole, so that the gas in the inner cavity at the top of the pneumatic groove 1201 is pushed back to the inner cavity outside the pneumatic cylinder 1101 through the connecting pipe 1204.

[0059] The working principle and use process of the present invention:

[0060] First, the operator can hold the top of the sampling rod 1 and completely insert the entire sampling bottle 2 into the water. When sampling is required, the rope can be pulled first to drive the winding ring 6 and the movable valve column 501 to move upward as a whole. During the upward movement of the movable valve column 501, the inner side of the top of the control valve tube 4 will squeeze and push the outer inclined surface of the trigger block 901 to drive the trigger block 901 and the shielding frame 904 to move toward each other, so as to release the shielding seal on the outer side of the top of the movable valve column 501 through the top of the shielding frame 904. Then, at this time, due to the principle that the gas density is lower than that of water and floats, the gas inside the sampling bottle 2 can quickly push the exhaust valve column 5031 upward, and pass through the gap between the exhaust valve column 5031 and the inner cavity in the middle of the movable valve column 501, and be completely discharged from the gap between the top and the shielding frame 904.

[0061] After that, when the gas inside the sampling bottle 2 is completely discharged, the gas in the cavity of the pneumatic groove 1201 below the piston block 1202 can be discharged at the same time, and the piston block 1202 as a whole is driven downward. At this time, the gap in the inner cavity at the top of the pneumatic groove 1201 becomes larger, which will generate negative pressure to draw out the gas in the inner cavity outside the pneumatic cylinder 1101 through the second power spring 1203, so that the negative pressure drives the two pneumatic rods 1102 to drive the baffle plate 10 as a whole to move away from each other, until the baffle plate 10 moves away from each other to release the obstruction to the bottom of the movable valve column 501, and at this time, the outer notch at the bottom of the movable valve column 501 is completely opposite to the water inlet pipe 5021.

[0062] Finally, the negative pressure generated by completely draining the gas inside the sampling bottle 2 can be pushed to move the valve ball 5022 inward, and then enter the interior of the sampling bottle sealing cover 3 through the water inlet pipe 5021 and the groove on the outside of the bottom of the movable valve column 501, so as to achieve the purpose of automatic sampling. When the water level moves to the top of the sampling bottle 2, it will be pulled by the second power spring 1203 to drive the piston block 1202 to move upward as a whole, so that the gas in the inner cavity at the top of the pneumatic groove 1201 enters the outer inner cavity of the pneumatic cylinder 1101 through the second power spring 1203, so that the pneumatic rod 1102 is driven by the air pressure to move the baffle plate 10 towards each other, and the top of the sampling bottle 2 is completely sealed and blocked, so as to achieve the purpose of quantitative water sampling. Subsequently, the sand content of the water inside the sampling bottle 2 can be detected by corresponding equipment.

[0063] 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.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand-containing water sampling device for water conservancy projects, characterized in that: comprising a sampling rod (1); A sampling bottle (2) is fixedly mounted on one side of the top of the sampling rod (1); A sampling bottle sealing cap (3) is threadedly sleeved on the top of the sampling bottle (2), and a control valve tube (4) is arranged on the top; The one-way valve assembly (5) comprises a movable valve column (501), wherein the movable valve column (501) is movably installed inside a control valve tube (4), a water inlet valve (502) is fixedly connected to the middle of the outer side of the control valve tube (4), an exhaust valve (503) is arranged in the middle of the bottom end of the movable valve column (501), and a wire winding ring (6) is arranged in the middle of the top end of the movable valve column (501).

2. The sand-containing water sampling device for water conservancy projects according to claim 1 is characterized in that: The water inlet valve (502) comprises a water inlet pipe (5021), a valve ball (5022) and a first connecting spring (5023); The water inlet pipe (5021) is fixedly connected to the middle part of the outer side of the control valve pipe (4), the valve ball (5022) is movably installed in the inner cavity of the water inlet pipe (5021), and the inner side of the valve ball (5022) is elastically connected to the inner cavity of the water inlet pipe (5021) via a first connecting spring (5023).

3. The sand-containing water sampling device for water conservancy projects according to claim 1 is characterized in that: The exhaust valve (503) comprises an exhaust valve rod (5031) and a second connecting spring (5032); The exhaust valve column (5031) is movably mounted at the bottom end of the middle part of the inner cavity of the movable valve column (501), and the top end of the exhaust valve column (5031) is elastically connected to the inner wall of the middle part of the movable valve column (501) via a second connecting spring (5032).

4. The sand-containing water sampling device for water conservancy projects according to claim 1 is characterized in that: A one-way valve flap (7) located outside the top of the movable valve column (501) is arranged inside the top of the control valve tube (4).

5. The sand-containing water sampling device for water conservancy projects according to claim 1 is characterized in that: A counterweight ring block (8) is provided at the top end of the inner cavity of the movable valve column (501).

6. The sand-containing water sampling device for water conservancy projects according to claim 1 is characterized in that: A shielding assembly (9) is arranged on the outer side of the top of the movable valve column (501), and the shielding assembly (9) comprises a trigger block (901), a limit column (902), a first power spring (903) and a shielding frame (904); The trigger block (901) is movably mounted on the outer side of the top of the movable valve column (501); the limit column (902) is arranged in the movable valve column (501) and is located inside the top of the trigger block (901); the top of the trigger block (901) is elastically connected to the inner wall of the movable valve column (501) through the first power spring (903); the shielding frame (904) is fixedly mounted on the inner side of the trigger block (901); the top of the shielding frame (904) is opposite to the notch on the outer side of the top of the movable valve column (501).

7. The sand-containing water sampling device for water conservancy projects according to claim 6 is characterized in that: The outer side of the trigger block (901) is designed with an inclined surface.

8. The sand-containing water sampling device for water conservancy projects according to claim 1 is characterized in that: Shielding plates (10) located between the sampling bottle (2) and the movable valve column (501) are movably installed on both sides of the bottom of the sampling bottle sealing cover (3).

9. The sand-containing water sampling device for water conservancy projects according to claim 1 is characterized in that: A first pneumatic assembly (11) located outside the shielding plate (10) is arranged inside the sampling bottle sealing cover (3), and the first pneumatic assembly (11) comprises a pneumatic cylinder (1101) and a pneumatic rod (1102); The pneumatic cylinder (1101) is fixedly mounted on the bottom of the sampling bottle sealing cover (3) and above the outer side of the shielding plate (10), and the pneumatic rod (1102) is movably mounted in the inner cavity of the pneumatic cylinder (1101), and the inner end is fixedly connected to the outer side of the top end of the shielding plate (10).

10. The sand-containing water sampling device for water conservancy projects according to claim 1, characterized in that: The bottom of the sampling bottle sealing cover (3) is provided with a second pneumatic assembly (12) located below the outer side of the pneumatic cylinder (1101), and the second pneumatic assembly (12) includes a pneumatic groove (1201), a piston block (1202), a second power spring (1203) and a connecting pipe (1204); The pneumatic groove (1201) is opened at the bottom of the sampling bottle sealing cover (3) and is located below the outer side of the pneumatic cylinder (1101). The piston block (1202) is movably installed in the inner cavity of the pneumatic groove (1201). The top of the piston block (1202) is elastically connected to the inner wall of the pneumatic groove (1201) through a second power spring (1203). The pneumatic groove (1201) is connected to the outer side of the pneumatic cylinder (1101) through a connecting pipe (1204).

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