Salinity sampling and testing device for critical part of light salt brine
By designing a salinity sampling and testing device at the critical point of light salinity, the combination of filter structure and piston spring design of the sampling cylinder and sponge disc are used to solve the problems of collection efficiency and accuracy in tidal intrusion experiments, and efficient and accurate salinity detection is achieved.
Patent Information
- Application Number
- CN202510508526.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2025-07-08
AI Technical Summary
In experiments that simulate saline invasion under the influence of tides, it is difficult for the prior art to efficiently collect the salt content of aqueous solutions at different depths of tidal beaches, and the collection process is easily disturbed by sand and gravel, which affects detection accuracy and efficiency.
A salinity sampling and testing device for the critical point of light salinity water is designed, using a filter structure combined with a sampling cylinder and a sponge disk, combined with the design of piston and spring to ensure sample purity and accuracy, and prevent leakage through a sealing structure. The ladder-shaped sand pile is used to simulate the natural tidal environment, and the array sampling ports ensure multi-point collection.
It improves the collection efficiency and detection accuracy, reduces sand and gravel interference, and ensures the purity of the test samples and the accuracy of detection.
Smart Images
Figure CN120275100A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of coastal water environment research, and particularly relates to a salinity sampling and testing device at the critical point of fresh and saline water. Background Art
[0002] When conducting experiments on saltwater intrusion under the influence of tides, it is necessary to detect the salt content of aqueous solutions at different depths of the tidal flat. Specifically, it is usually carried out by simulating the seaside beach environment indoors and using a tidal generator to form a circulating tidal water impact test on the indoor simulated beach environment.
[0003] During the simulation test, in order to detect the salinity boundaries at different relative positions of the simulated beach, it is necessary to collect and detect different positions of the aquifer. However, when collecting the internal aqueous solution, it is easily interfered by the sand and gravel in the experiment, and it is necessary to purify and filter the mixed solution collected from different positions of the sand and gravel multiple times. The operation is cumbersome and affects the collection efficiency of the aqueous solution at different depths in the sand and gravel.
[0004] In view of the above problems, the present invention designs and manufactures a salinity sampling and testing device at the critical point of fresh and saline water to overcome the above defects. Summary of the Invention
[0005] For the problems existing in the prior art, a salinity sampling and testing device at the critical point of fresh and saline water provided by the present invention can improve the collection efficiency and ensure the detection accuracy of the collected test samples at the same time.
[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: A salinity sampling and testing device at the critical point of fresh and saline water, including a water tank, a sand pile is arranged inside the water tank, a sampling port is arranged on one side wall of the water tank close to the sand pile, and the sampling port is connected with a sampling mechanism through a sealing structure; The sampling mechanism includes a sampling cylinder, the sampling cylinder can be inserted into the water tank, a plurality of filter holes are arranged on the side wall of the sampling cylinder inserted into the water tank, a sponge disk is arranged inside the sampling cylinder inserted into the water tank, and the sponge disk can adsorb the test sample through the filter holes; A movable piston rod is arranged inside the other end of the sampling cylinder, a piston is arranged at the end of the piston rod, a spring is arranged between the piston and the sponge disk, a drain pipe is arranged on the side wall of the sampling cylinder on the side away from the conical head of the sponge disk, the drain pipe is located outside the water tank, and a sampling valve is arranged on the drain pipe.
[0007] Preferably, the sand pile is trapezoidal; One end of the water tank is connected with a fresh water input port, the fresh water input port is close to the high point of the trapezoidal sand pile, the other end of the water tank is provided with a salt water input port, and the salt water input port is close to the slope of the trapezoidal sand pile.
[0008] Preferably, a brine tank is connected to the brine input port, and a tidal generator is provided between the brine tank and the brine input port.
[0009] Preferably, a fresh water tank is connected to the fresh water input port, and a peristaltic pump is provided between the fresh water tank and the fresh water input port.
[0010] Preferably, the brine tank and the tidal generator are connected by a circulation pump.
[0011] Preferably, a brine output port is further provided on the water tank. The brine input port and the tidal generator are connected through a brine input pipe, and the brine output port and the tidal generator are connected through a brine output pipe.
[0012] Preferably, there are multiple sampling ports, and the multiple sampling ports are distributed in an array grid pattern.
[0013] Preferably, a conical head is provided at one end of the sampling cylinder inserted into the water tank.
[0014] Preferably, the connection port of the drain pipe and the sampling cylinder is always located between the moving piston and the sponge disk.
[0015] Preferably, the sealing structure is a sealing ring, and the sealing ring is arranged between the sampling cylinder and the sampling port.
[0016] The advantages of the present invention are as follows: 1. A spring is arranged between the piston and the sponge disk of the present invention, which not only forms a sampling space between the piston and the sponge disk, but also reserves space for the movement of the piston; in addition, the movement of the piston will compress the sponge disk through the spring, so that the test sample in the sponge disk is extruded into the space between the piston and the sponge disk, ensuring the normal acquisition of the test sample. Moreover, the sponge disk of the present invention can also play a filtering role, combined with the filter holes to form a double filtering function, avoiding the interference of sand piles in the collected test sample, improving the purity of the collected test sample, and improving the accuracy of experimental detection.
[0017] 2. The sampling cylinder of the present invention can quickly insert into the sand pile by using the conical head, and multiple sampling ports are distributed in an array grid pattern, ensuring the collection of test samples inside the sand pile at different depth positions. Description of the Drawings
[0018] Figure 1 It is a schematic diagram of a salinity sampling and testing device at the critical point of fresh brine; Figure 2 It is a schematic diagram of the structure of the sampling mechanism of the present invention.
[0019] In the figure: 1. water tank; 2. sand pile; 3. fresh water tank; 4. peristaltic pump; 5. sampling port; 6. tide generator; 7. brine tank; 8. circulation pump; 9. brine output pipe; 10. brine input pipe; 11. sampling cylinder; 12. filtering holes; 13. conical head; 14. drain pipe; 15. sampling valve; 16. sponge disc; 17. spring; 18. piston rod; 19. piston. Detailed implementation manners
[0020] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.
[0021] As Figure 1 、 Figure 2 shown, a salinity sampling and testing device at the critical point of fresh brine includes a water tank 1. A sand pile 2 is arranged in the water tank 1. A sampling port 5 is arranged on one side wall of the water tank 1 close to the sand pile 2. The sampling port 5 is connected with a sampling mechanism through a sealing structure.
[0022] The sampling mechanism of the present invention includes a sampling cylinder 11. The sampling cylinder 11 can be inserted into the water tank 1. A plurality of filtering holes 12 are arranged on the side wall of the sampling cylinder 11 inserted into the water tank 1. A sponge disc 16 is arranged inside the sampling cylinder 11 inserted into the water tank 1. The sponge disc 16 can adsorb test samples through the filtering holes 12.
[0023] The sponge disc 16 can play a filtering role, and forms a dual filtering function in combination with the filtering holes 12, avoiding the interference of the sand pile 2 in the collected test samples, improving the purity of the collected test samples, and improving the accuracy of experimental detection.
[0024] At the other end inside the sampling cylinder 11 of the present invention, a movable piston rod 18 is arranged. A piston 19 is arranged at the end of the piston rod 18. A spring 17 is arranged between the piston 19 and the sponge disc 16. A drain pipe 14 is arranged on the side wall of the sampling cylinder 11 on the side of the sponge disc 16 away from the conical head 13. The drain pipe 14 is located outside the water tank 1. A sampling valve 15 is arranged on the drain pipe 14. The connection port of the drain pipe 14 and the sampling cylinder 11 is always located between the moving piston 19 and the sponge disc 16.
[0025] By arranging the spring 17 between the piston 19 and the sponge disc 16 in the above structure, not only a sampling space is formed between the piston 19 and the sponge disc 16, but also a space is reserved for the movement of the piston 19; in addition, the movement of the piston 19 will compress the sponge disc 16 through the spring 17, so that the test samples in the sponge disc 16 are extruded into the space between the piston 19 and the sponge disc 16, ensuring the normal acquisition of test samples.
[0026] To truly simulate the actual beach tidal environment, the sand pile 2 of the present invention is preferably set in a trapezoidal shape. One end of the water tank 1 is connected to a fresh water input port, and the fresh water input port is close to the high point of the trapezoidal sand pile 2. The other end of the water tank 1 is provided with a salt water input port, and the salt water input port is close to the slope of the trapezoidal sand pile 2, such that the slope of the sand pile 2 faces the direction of the salt water input port.
[0027] Specifically, the fresh water input port is connected to a fresh water tank 3, and a peristaltic pump 4 is provided between the fresh water tank 3 and the fresh water input port. The salt water input port is connected to a salt water tank 7, and a tidal generator 6 is provided between the salt water tank 7 and the salt water input port. The salt water tank 7 and the tidal generator 6 are connected by a circulation pump 8. The aqueous solution inside the salt water tank 7 is transported into the water tank 1 through the tidal generator 6 to impact the sand pile 2 accumulated inside the water tank 1, simulating the seaside tides in nature. A salt water output port is also provided on the water tank 1. The salt water input port and the tidal generator 6 are connected through a salt water input pipe 10, and the salt water output port and the tidal generator 6 are connected through a salt water output pipe 9. Valves are provided on both the salt water input pipe 10 and the salt water output pipe 9.
[0028] The present invention has multiple sampling ports 5, and the multiple sampling ports 5 are distributed in an array grid, ensuring the collection of test samples inside the sand pile 2 at different depth positions. A conical head 13 is provided at one end of the sampling cylinder 11 inserted into the water tank 1, and the conical head 13 can be used to easily and quickly insert into the sand pile 2.
[0029] The sealing structure is set as a sealing ring, and the sealing ring is arranged between the sampling cylinder 11 and the sampling port 5. A sealing plug can also be selected. Even when the sampling cylinder 11 is removed from the sampling port 5, the sealing plug can seal the sampling port 5 to prevent the aqueous solution in the water tank 1 from leaking through the sampling port 5.
[0030] It should be understood that the uses of these embodiments are only for illustrating the present invention and are not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications, and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.
Claims
1. A salinity sampling and testing device at the critical point of light brine, characterized in that, It includes a water tank (1), in which there is a sand pile (2). On one side wall of the water tank (1) near the sand pile (2), there is a sampling port (5), and the sampling port (5) is connected with a sampling mechanism through a sealing structure; The sampling mechanism includes a sampling cylinder (11), which can be inserted into the water tank (1). There are a number of filter holes (12) on the side wall of the sampling cylinder (11) inserted into the water tank (1). Inside the sampling cylinder (11) inserted into the water tank (1), there is a sponge disc (16), and the sponge disc (16) can adsorb test samples through the filter holes (12); At the other end inside the sampling cylinder (11), there is a movable piston rod (18). At the end of the piston rod (18), there is a piston (19). A spring (17) is arranged between the piston (19) and the sponge disc (16). On the side wall of the sampling cylinder (11) on the side of the sponge disc (16) away from the conical head (13), there is a drain pipe (14). The drain pipe (14) is located outside the water tank (1), and a sampling valve (15) is arranged on the drain pipe (14).
2. The salinity sampling and testing device at the critical point of light brine according to claim 1, characterized in that, The sand pile (2) is trapezoidal; One end of the water tank (1) is connected with a fresh water input port, and the fresh water input port is close to the high point of the trapezoidal sand pile (2). The other end of the water tank (1) is provided with a brine input port, and the brine input port is close to the slope of the trapezoidal sand pile (2).
3. The salinity sampling and testing device at the critical point of the light brine according to claim 2, characterized in that, The brine input port is connected with a brine tank (7), and a tidal generator (6) is arranged between the brine tank (7) and the brine input port.
4. A salinity sampling and testing device at the critical point of light brine according to claim 2, characterized in that, The fresh water input port is connected with a fresh water tank (3), and a peristaltic pump (4) is arranged between the fresh water tank (3) and the fresh water input port.
5. The salinity sampling and testing device at the critical point of light brine according to claim 3, characterized in that, The brine tank (7) and the tidal generator (6) are connected through a circulation pump (8).
6. The salinity sampling and testing device at the critical point of light brine according to claim 5, characterized in that, The water tank (1) is also provided with a brine output port. The brine input port and the tidal generator (6) are communicated through a brine input pipe (10), and the brine output port and the tidal generator (6) are communicated through a brine output pipe (9).
7. A salinity sampling and testing device at the critical point of light brine according to claim 1, characterized in that, There are multiple sampling ports (5), and the multiple sampling ports (5) are distributed in an array grid pattern.
8. A salinity sampling and testing device at the critical point of light brine according to claim 1, characterized in that, One end of the sampling cylinder (11) inserted into the water tank (1) is provided with a conical head (13).
9. A salinity sampling and testing device at the critical point of light brine according to claim 1, characterized in that, The connection port of the drain pipe (14) and the sampling cylinder (11) is always located between the moving piston (19) and the sponge disc (16).
10. A salinity sampling and testing device at the critical point of light brine according to claim 1, characterized in that, The sealing structure is a sealing ring, and the sealing ring is arranged between the sampling cylinder (11) and the sampling port (5).