In-situ measuring device for salt release rate of reservoir bottom sediment

Abstract

The present invention discloses an in-situ measurement device for the salt release rate of reservoir bottom sediment, which relates to the field of environmental water body detection. It includes a sleeve, a measurement cylinder and a negative pressure pipe. The measurement cylinder is sleeved in the sleeve, and the negative pressure pipe is sleeved inside the sleeve. The surface of the sleeve is provided with first permeation holes. Inside the measurement cylinder, three groups of conductivity probes are arranged vertically to measure the salt release rate of the reservoir bottom sediment. Sealing rings are arranged between each group of conductivity probes. Four groups of airtight sleeves are evenly sleeved outside the measurement cylinder to divide the measurement cylinder into three groups of test units in the vertical direction. The liquid in the bottom sediment enters the inside of the sleeve through the first permeation holes. Three groups of second suction holes are arranged vertically on the negative pressure pipe. The negative pressure pipe provides negative pressure for the inside of the sleeve through the second suction holes to accelerate the liquid in the bottom sediment to enter the three groups of test units. A switchable conical part is installed at the bottom of the sleeve to reduce the resistance when the sleeve is buried and increase the stability after the sleeve is buried.

Description

Technical Field

[0001] The present invention relates to the field of environmental water body detection, and specifically to an in-situ determination device for the salt release rate of reservoir bottom sediment. Background Art

[0002] The in-situ determination of the salt release rate of reservoir bottom sediment is a complex but crucial task, which helps to understand the salinity impact of the bottom sediment on the overlying water body, thereby providing a scientific basis for the water quality management of the reservoir. However, traditional in-situ determination devices for the salt release rate of reservoir bottom sediment often face difficulties in measuring the salt release rate of reservoir bottom sediment due to the non-uniformity of the reservoir bottom sediment in the sampling area and the lack of representativeness of the sampled reservoir bottom sediment. Moreover, the liquid contained in the reservoir bottom sediment can also be used to measure the salt release rate of the reservoir bottom sediment. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an in-situ determination device for the salt release rate of reservoir bottom sediment, which sucks the liquid contained in the reservoir bottom sediment into the salt release rate determination device for measurement, thereby improving the accuracy of measuring the salt release rate of reservoir bottom sediment.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: An in-situ determination device for the salt release rate of reservoir bottom sediment, comprising:

[0005] An in-situ determination device for the salt release rate of reservoir bottom sediment, characterized in that it comprises:

[0006] A sleeve, on the surface of which there are first permeation holes, and the liquid in the reservoir bottom sediment permeates into the interior of the sleeve through the first permeation holes;

[0007] A determination cylinder, which is sleeved inside the sleeve. On the surface of the determination cylinder, there are respectively and evenly provided a first sealing sleeve, a second sealing sleeve, a third sealing sleeve and a fourth sealing sleeve in the vertical direction. There are three groups of first suction holes on the surface of the determination cylinder. At the central positions of the first sealing sleeve and the second sealing sleeve, the second sealing sleeve and the third sealing sleeve, and the third sealing sleeve and the fourth sealing sleeve on the surface of the determination cylinder, there are the first suction holes. A one-way solenoid valve is installed inside the first suction holes, and the liquid in the sleeve flows unidirectionally into the determination cylinder, preventing the liquid to be detected stored inside the determination cylinder from flowing out through the first suction holes and affecting the test of the salt release rate of the reservoir bottom sediment;

[0008] Salt release rate test component. The salt release rate test component includes a negative pressure pipe and a first conductivity probe. The negative pressure pipe is sleeved at the central position of the measuring cylinder. The liquid of the reservoir bottom mud enters the inside of the measuring cylinder through the first suction hole. Three groups of first conductivity probes are respectively arranged on the surface of the negative pressure pipe in the vertical direction to measure the salt release rate of the reservoir bottom mud. Four groups of sealing rings are evenly arranged on the surface of the negative pressure pipe in the vertical direction from top to bottom. The three groups of first conductivity probes are respectively and evenly arranged between the four groups of sealing rings. On the surface of the negative pressure pipe, a second suction hole is arranged on the lower side of each group of conductivity probes. A negative pressure drive is arranged at the top of the negative pressure pipe. The negative pressure drive provides negative pressure to the negative pressure pipe. The negative pressure pipe provides negative pressure to the inside of the sleeve through the second suction hole. After negative pressure is generated inside the measuring cylinder and the sleeve, the liquid of the reservoir bottom mud enters the inside of the sleeve and the measuring cylinder. The output end of the negative pressure drive is provided with a drain pipe. The liquid inside the sleeve and the measuring cylinder is discharged through the drain pipe, so as to ensure the uniformity and representativeness of the liquid in the measuring cylinder and ensure the accuracy of the measurement of the salt release rate by the first conductivity probe.

[0009] Preferably, a one-way valve assembly is arranged on the surface of the second suction hole. The one-way valve assembly includes a rotating rod, a switching member and a limiting block. The rotating rod is installed at the top of the second suction hole. The switching member rotates along the rotating rod. The limiting block is arranged at the bottom of the second suction hole to limit the switching member. The liquid seeping out from the reservoir bottom mud enters the negative pressure pipe unidirectionally, avoiding the mutual flow of the liquid of the reservoir bottom mud in different strata and reducing the accuracy of the salt release rate of the reservoir bottom mud.

[0010] Preferably, a flow guide plate is arranged on the inner side of the negative pressure pipe close to the second suction hole. The flow guide plate is arranged obliquely upward. The water flow on the lower side of the flow guide plate flows directly upward after passing through the flow guide plate. The liquid flowing out from the second suction hole flows upward through the flow guide plate, avoiding the liquid on the lower side of the negative pressure pipe from entering the second suction hole on the upper side, so as to avoid the mutual flow of the liquid in different strata from affecting the detection result of the salt release rate.

[0011] Preferably, a second penetration hole is arranged on the obliquely lower side of each first penetration hole. The staggered distribution of the second penetration hole and the first penetration hole sucks the liquid in the reservoir bottom mud in the adjacent horizontal layer into the sleeve. Filter meshes are arranged on the surfaces of the first penetration hole and the second penetration hole, so as to avoid the residue in the reservoir bottom mud from entering the sleeve and affecting the measurement of the salt release rate.

[0012] Preferably, the first sealed sleeve, the second sealed sleeve, the third sealed sleeve and the fourth sealed sleeve are all closely attached to the inside of the sleeve, and are all connected to the inner wall of the sleeve through the sealant. The sealing ring is connected to the inner wall of the measuring cylinder through the sealant, ensuring the tightness on both the upper and lower sides of the first sealed sleeve, the second sealed sleeve, the third sealed sleeve, the fourth sealed sleeve and the sealing ring, ensuring that the collected liquid corresponds to the respective reservoir bottom mud layers, and ensuring the accuracy of the salt release rate measurement.

[0013] Preferably, each group of the first conductivity probes is respectively installed at the central position between the first sealing ring and the second sealing ring, between the second sealing ring and the third sealing ring, and between the third sealing ring and the fourth sealing ring. The second conductivity probes and the third conductivity probes are arranged at equal intervals on the upper side and the lower side of each group of the first conductivity probes respectively. The final determined result of the salt release rate between the sealing rings is the average value of the results obtained by the first conductivity probes, the second conductivity probes and the third conductivity probes, ensuring the accuracy of the salt release rate measurement.

[0014] Preferably, hooks are provided at the bottom of each group of the sleeves, and buckles are provided at the top of the sleeves. When assembling multiple groups of sleeves, the buckles at the top of the sleeves are buckled on the hooks, so as to realize the measurement of the salt release rate of the reservoir bottom mud at different depths.

[0015] Preferably, an openable and closable cone is provided at the bottom end of the sleeve. The openable and closable cone is conical to reduce the resistance of the reservoir bottom mud when the sleeve is lowered.

[0016] Preferably, the openable and closable cone is composed of two groups of symmetrically arranged stabilizing members. An oil-filled underwater motor is installed inside the bottom of the sleeve. Output ends of the oil-filled underwater motor are respectively provided with two groups of symmetrically arranged sleeves and telescopic rods. The oil-filled underwater motor drives the telescopic rods to expand and contract in the sleeves. A clamping groove is provided inside the stabilizing member. One ends of the two groups of telescopic rods are respectively connected to the clamping groove. After the sleeve is buried in the reservoir bottom, the telescopic rods drive the stabilizing members to extend towards both sides, expanding the range of the openable and closable cone in the horizontal direction to stabilize the sleeve.

[0017] Beneficial effects: The present invention provides an in-situ measuring device for the salt release rate of reservoir bottom sediment. The negative pressure pipe is provided with vertically distributed conductivity probes for measuring the salt release rate. The negative pressure drive can suck the reservoir bottom sediment from the first permeation hole and the second permeation hole into the sleeve, and then suck the liquid into the first measuring cylinder through the first suction hole, so that the liquid in the measuring cylinder remains flowing, thereby maintaining the uniformity of the liquid in the measuring cylinder and improving the accuracy of measuring the salt release rate of the reservoir bottom sediment. The openable and closable cone is conical to reduce the resistance of the reservoir bottom sediment when the sleeve is lowered. After the sleeve is buried in the reservoir, the telescopic rod drives the stabilizing member to extend to both sides, expanding the range of the openable and closable cone in the horizontal direction to stabilize the sleeve. Description of the Drawings

[0018] The drawings are used to provide a further understanding of the present invention, 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 to the present invention.

[0019] In the drawings:

[0020] Figure 1 is the overall schematic diagram of the in-situ measuring device for the salt release rate of reservoir bottom sediment of the present invention;

[0021] Figure 2 is the schematic diagram of the measuring cylinder of the present invention;

[0022] Figure 3 is the schematic diagram of the negative pressure pipe and the conductivity probe of the present invention;

[0023] Figure 4 is the schematic diagram of the one-way valve assembly of the present invention;

[0024] Figure 5 is the schematic diagram of the flow guide plate of the present invention;

[0025] Figure 6 is the schematic diagram of the openable and closable cone of the present invention.

[0026] Reference numerals in the drawings: 1, sleeve; 2, buckle; 3, negative pressure drive; 4, drain pipe; 5, first permeation hole; 6, second permeation hole; 7, openable and closable cone; 8, negative pressure pipe; 9, measuring cylinder; 10, one-way solenoid valve; 11, sealing ring; 12, first suction hole; 13, first conductivity probe; 14, switch member; 15, limit block; 16, rotating rod; 17, second suction hole; 18, sleeve; 19, telescopic rod; 20, stabilizing member; 21, card slot; 22, second conductivity probe; 23, third conductivity probe; 24, oil-filled underwater motor; 25, flow guide plate; 26, first closed sleeve; 27, second closed sleeve; 28, third closed sleeve; 29, fourth closed sleeve. Detailed Embodiments

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following text is only used to describe an implementation manner of an in-situ measurement device for the salt release rate of reservoir bottom sediment of the present invention, and does not strictly limit the specific scope of protection claimed by the present invention.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0029] Example: As Figures 1-6 shown, an in-situ measurement device for the salt release rate of reservoir bottom sediment includes:

[0030] A sleeve 1, as Figure 1 shown, the surface of the sleeve 1 is provided with first permeation holes 5, and the liquid in the reservoir bottom sediment penetrates into the inside of the sleeve 1 through the first permeation holes 5;

[0031] A measuring cylinder 9, as Figure 1 and Figure 2 shown, the measuring cylinder 9 is sleeved inside the sleeve 1. The surface of the measuring cylinder 9 is evenly provided with a first sealing sleeve 26, a second sealing sleeve 27, a third sealing sleeve 28, and a fourth sealing sleeve 29 in the vertical direction. The surface of the measuring cylinder 9 is provided with three groups of first suction holes 12. On the surface of the measuring cylinder 9, the first suction holes 12 are provided at the central positions of the first sealing sleeve 26 and the second sealing sleeve 27, the central positions of the second sealing sleeve 27 and the third sealing sleeve 28, and the central positions of the third sealing sleeve 28 and the fourth sealing sleeve 29. A one-way solenoid valve 10 is installed inside the first suction holes 12, and the liquid in the sleeve 1 flows unidirectionally into the measuring cylinder 9 to prevent the liquid to be detected stored inside the measuring cylinder 9 from flowing out through the first suction holes 12, affecting the measurement of the salt release rate of the reservoir bottom sediment;

[0032] A salt release rate test assembly, as Figure 3As shown in the figure, the salt release rate test component includes a negative pressure tube 8 and a first conductivity probe 13. The negative pressure tube 8 is sleeved at the central position of the measuring cylinder 9. The liquid of the reservoir bottom mud enters the inside of the measuring cylinder 9 through the first suction hole 12. Three groups of first conductivity probes 13 are respectively arranged on the surface of the negative pressure tube 8 in the vertical direction to measure the salt release rate of the reservoir bottom mud. Four groups of sealing rings 11 are evenly arranged on the surface of the negative pressure tube 8 from top to bottom in the vertical direction. The three groups of first conductivity probes 13 are respectively and evenly arranged between the four groups of sealing rings 11. On the surface of the negative pressure tube 8, a second suction hole 17 is arranged on the lower side of each group of conductivity probes. A negative pressure driver 3 is arranged at the top of the negative pressure tube 8. The negative pressure driver 3 provides negative pressure to the negative pressure tube 8. The negative pressure tube 8 provides negative pressure to the inside of the sleeve 1 through the second suction hole 17. After negative pressure is generated inside the measuring cylinder 9 and the sleeve 1, the liquid of the reservoir bottom mud enters the inside of the sleeve 1 and the measuring cylinder 9. The output end of the negative pressure driver 3 is provided with a drain pipe 4. The liquid inside the sleeve 1 and the measuring cylinder 9 is discharged through the drain pipe 4, so as to ensure the uniformity and representativeness of the liquid in the measuring cylinder 9 and ensure the accuracy of the measurement of the salt release rate by the first conductivity probe 13.

[0033] In the embodiment, as Figure 4 shown, a one-way valve assembly is arranged on the surface of the second suction hole 17. The one-way valve assembly includes a rotating rod 16, a switch member 14 and a limiting block 15. The rotating rod 16 is installed at the top of the second suction hole 17. The switch member 14 rotates along the rotating rod 16. The limiting block 15 is arranged at the bottom of the second suction hole 17 to limit the switch member 14. The liquid seeping out of the reservoir bottom mud enters the negative pressure tube 8 unidirectionally, avoiding the mutual flow of the liquid of the reservoir bottom mud in different strata and reducing the accuracy of the salt release rate of the reservoir bottom mud.

[0034] In the embodiment, as Figure 5 shown, a flow guide plate 25 is arranged on one side of the negative pressure tube 8 close to the second suction hole 17. The flow guide plate 25 is arranged obliquely upward. The water flow under the flow guide plate 25 flows directly upward through the flow guide plate 25. The liquid flowing out of the second suction hole 17 flows upward through the flow guide plate 25, avoiding the liquid on the lower side of the negative pressure tube 8 from entering the second suction hole 17 on the upper side, so as to avoid the mutual flow of the liquid in different strata from affecting the detection result of the salt release rate.

[0035] In the embodiment, as Figure 1As shown, a second permeation hole 6 is provided on the lower inclined side of each of the first permeation holes 5. The staggered distribution of the second permeation holes 6 and the first permeation holes 5 sucks the liquid in the reservoir bottom mud in adjacent horizontal layers into the sleeve 1, increasing the representativeness of the liquid to be detected around. Filter meshes are provided on the surfaces of the first permeation holes 5 and the second permeation holes 6, thereby preventing the residues in the reservoir bottom mud from entering the sleeve 1 and affecting the measurement of the salt release rate.

[0036] In the embodiment, as Figure 2 and Figure 3 shown, the first sealing sleeve 26, the second sealing sleeve 27, the third sealing sleeve 28 and the fourth sealing sleeve 29 are all closely attached to the inside of the sleeve 1 and are all connected to the inner wall of the sleeve 1 through the sealant. The sealing ring 11 is connected to the inner wall of the measuring cylinder 9 through the sealant, ensuring the tightness on the upper and lower sides of the first sealing sleeve 26, the second sealing sleeve 27, the third sealing sleeve 28, the fourth sealing sleeve 29 and the sealing ring, ensuring that the taken liquid corresponds to the respective reservoir bottom mud layers, and ensuring the accuracy of the salt release rate measurement.

[0037] In the embodiment, as Figure 3 shown, each group of the first conductivity probes 13 are respectively installed at the central positions between the first sealing ring 11 and the second sealing ring 11, the second sealing ring 11 and the third sealing ring 11, and the third sealing ring 11 and the fourth sealing ring 11. The second conductivity probes 22 and the third conductivity probes 23 are arranged at equal intervals on the upper side and the lower side of each group of the first conductivity probes 13. The final determined result of the salt release rate between the sealing rings 11 is the average value of the results obtained by the first conductivity probes 13, the second conductivity probes 22 and the third conductivity probes 23, ensuring the accuracy of the salt release rate measurement.

[0038] In the embodiment, as Figure 1 and Figure 6 shown, a hook is provided at the bottom of each group of the sleeves 1, and a buckle 2 is provided at the top of the sleeve 1. When assembling multiple groups of sleeves 1, the buckle 2 at the top of the sleeve 1 is stuck on the hook, thereby realizing the measurement of the salt release rate of the reservoir bottom mud at different depths.

[0039] In the embodiment, as Figure 1 and Figure 6 shown, an openable and closable conical member 7 is provided at the bottom end of the sleeve 1. The openable and closable conical member 7 is conical to reduce the resistance of the reservoir bottom mud when the sleeve 1 is lowered.

[0040] In the embodiment, as Figure 6As shown, the openable and closable conical member 7 is composed of two sets of symmetrically arranged stabilizing members 20. An oil-filled underwater motor 24 is installed inside the bottom of the sleeve 1. Two sets of symmetrically arranged sleeves 18 and telescopic rods 19 are respectively provided at the output end of the oil-filled underwater motor 24. The oil-filled underwater motor 24 drives the telescopic rod 19 to expand and contract within the sleeve 18. A clamping groove 21 is provided inside the stabilizing member 20. One end of each of the two telescopic rods 19 is respectively connected to the clamping groove 21. After the sleeve 1 is buried in the reservoir bottom, the telescopic rod 19 drives the stabilizing member 20 to extend to both sides, expanding the range of the openable and closable conical member 7 in the horizontal direction for stabilizing the sleeve 1.

[0041] When the device is in use, the openable and closable conical member 7 is used to bury the sleeve 1 at the position to be detected in the reservoir bottom mud. The oil-filled underwater motor 24 controls the stabilizing member 20 to extend in the horizontal direction, expanding the range of the openable and closable conical member 7 in the horizontal direction for stabilizing the sleeve 1. The negative pressure driver 3 sucks the reservoir bottom mud from the first penetration holes 5 and the second penetration holes 6 into the inside of the sleeve 1, and then sucks the liquid into the first measuring cylinder 9 through the first suction hole 12, so that the liquid in the measuring cylinder 9 remains flowing, maintaining the uniformity of the reservoir bottom mud in the sleeve 1, and improving the accuracy of measuring the salt release rate of the reservoir bottom mud. The first conductivity probe 13, the second conductivity probe 22, and the third conductivity probe 23 measure the salt release rate of the liquid in the reservoir bottom mud. The final determination result of the salt release rate is the average value of the results obtained by the first conductivity probe 13, the second conductivity probe 22, and the third conductivity probe 23.

[0042] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An in-situ measuring device for the salt release rate of reservoir bottom sediment, characterized in that: Comprising: A sleeve, on the surface of which there are first permeation holes, and the liquid in the reservoir bottom sludge permeates into the interior of the sleeve through the first permeation holes; A measuring cylinder, which is sleeved inside the sleeve. On the surface of the measuring cylinder, there are respectively and evenly arranged a first sealing sleeve, a second sealing sleeve, a third sealing sleeve and a fourth sealing sleeve in the vertical direction. There are three groups of first suction holes on the surface of the measuring cylinder. On the surface of the measuring cylinder, the first suction holes are provided at the central positions of the first sealing sleeve and the second sealing sleeve, the second sealing sleeve and the third sealing sleeve, and the third sealing sleeve and the fourth sealing sleeve. A one-way solenoid valve is installed inside the first suction hole, and the liquid in the sleeve flows unidirectionally into the measuring cylinder; A salt release rate testing assembly, which includes a negative pressure pipe and a first conductivity probe. The negative pressure pipe is sleeved at the central position of the measuring cylinder. The liquid of the reservoir bottom sludge enters the interior of the measuring cylinder through the first suction holes. Three groups of first conductivity probes are respectively arranged on the surface of the negative pressure pipe in the vertical direction to measure the salt release rate of the reservoir bottom sludge. Four groups of sealing rings are evenly arranged on the surface of the negative pressure pipe from top to bottom in the vertical direction. Each group of the first conductivity probes is respectively installed at the central position between the first sealing ring and the second sealing ring, the second sealing ring and the third sealing ring, and the third sealing ring and the fourth sealing ring. Second conductivity probes and third conductivity probes are arranged at equal intervals on the upper side and the lower side of each group of the first conductivity probes respectively. The final determined result of the salt release rate between the sealing rings is the average value of the results obtained by the first conductivity probe, the second conductivity probe and the third conductivity probe. On the surface of the negative pressure pipe, second suction holes are provided on the lower side of each group of the conductivity probes. A negative pressure drive is arranged at the top of the negative pressure pipe, and the negative pressure drive provides negative pressure to the negative pressure pipe. The negative pressure pipe provides negative pressure to the inside of the sleeve through the second suction holes. After negative pressure is generated inside the measuring cylinder and the sleeve, the liquid of the reservoir bottom sludge enters the interior of the sleeve and the measuring cylinder. A drain pipe is arranged at the output end of the negative pressure drive, and the liquid inside the sleeve and the measuring cylinder is discharged through the drain pipe; A one-way valve assembly, a one-way valve assembly is arranged on the surface of the second suction hole. The one-way valve assembly includes a rotating rod, a switch member and a limiting block. The rotating rod is installed at the top of the second suction hole, the switch member rotates along the rotating rod, and the limiting block is arranged at the bottom of the second suction hole to limit the switch member. The liquid permeating out of the reservoir bottom sludge enters the negative pressure pipe unidirectionally. A flow guide plate is arranged on the side of the negative pressure pipe close to the second suction hole, and the flow guide plate is arranged obliquely upward. The water flow on the lower side of the flow guide plate flows directly upward after flowing through the flow guide plate. The liquid flowing out of the second suction hole flows upward through the flow guide plate.

2. The in-situ measurement device for the salt release rate of reservoir bottom sediment according to claim 1, characterized in that: A second penetration hole is provided on the lower inclined side of each of the first penetration holes. The staggered distribution of the second penetration holes and the first penetration holes sucks the liquid in the reservoir bottom mud in adjacent horizontal layers into the sleeve. Filter meshes are provided on the surfaces of the first penetration holes and the second penetration holes to prevent residues in the reservoir bottom mud from entering the sleeve.

3. The in-situ measuring device for the salt release rate of reservoir bottom sediment according to claim 1, characterized in that: The first sealed sleeve, the second sealed sleeve, the third sealed sleeve and the fourth sealed sleeve are all closely attached to the inside of the sleeve and are connected to the inner wall of the sleeve through sealant. The sealing ring is connected to the inner wall of the measuring cylinder through sealant.

4. The in-situ measurement device for the salt release rate of reservoir bottom sediment according to claim 1, wherein: A hook is provided at the bottom of each group of sleeves, and a buckle is provided at the top of the sleeve. When assembling multiple groups of sleeves, the buckle at the top of the sleeve is stuck on the hook.

5. The in-situ measurement device for the salt release rate of reservoir bottom sediment according to claim 1, characterized in that: An openable and closable cone is provided at the bottom end of the sleeve. The openable and closable cone is conical to reduce the resistance of the reservoir bottom mud when the sleeve is lowered.

6. The in-situ measurement device for the salt release rate of reservoir bottom sediment according to claim 1, wherein: The openable and closable cone is composed of two symmetrically arranged stabilizing members. An oil-filled underwater motor is installed inside the bottom of the sleeve. The output ends of the oil-filled underwater motor are respectively provided with two symmetrically arranged sleeves and telescopic rods. The oil-filled underwater motor drives the telescopic rods to expand and contract in the sleeves. A clamping groove is provided inside the stabilizing members. One ends of the two telescopic rods are respectively connected to the clamping grooves. After the sleeve is buried in the reservoir bottom, the telescopic rods drive the stabilizing members to extend to both sides, expanding the range of the openable and closable cone in the horizontal direction to stabilize the sleeve.

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