Multi-layer groundwater level surveying device and surveying method thereof

Abstract

The invention discloses a multi-layer underground water level surveying device and a surveying method thereof, and belongs to the technical field of underground water surveying. The surveying device comprises a surveying device, and a detection groove is formed in the lower end of the surveying device; a guide rod is longitudinally arranged in the detection groove, and a floating ball is slidably mounted on the guide rod; a proximity switch matched with the floating ball is arranged on one side of the guide rod; a water sensor is arranged on the side wall of the detection groove. The water surface is detected through the proximity switch and the water immersion sensor, so that false detection caused when the floating ball is blocked by air flow and obstacles to rise is avoided, and the detection accuracy and reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of groundwater surveying, and in particular to a multi-layer groundwater level surveying device and a surveying method thereof. Background Art

[0002] Multi-layer groundwater, as a special form of groundwater, consists of an aquiclude between two aquifers. The groundwater level refers to the elevation of the water surface in the underground aquifer. The hydrogeology of multi-layer groundwater is a branch of geology, referring to the various changes and movements of groundwater in nature. Hydrogeology is the science of studying groundwater, focusing on its distribution and formation patterns, its physical properties and chemical composition, groundwater resources and their rational utilization, and the adverse effects of groundwater on engineering construction and mining, as well as their prevention and control. With the development of science and the needs of production and construction, hydrogeology has been further divided into regional hydrogeology, groundwater dynamics, hydrogeochemistry, water supply hydrogeology, ore deposit hydrogeology, and soil improvement hydrogeology.

[0003] The water level survey of multiple layers of groundwater is an important research topic in hydrogeological research. CN105136238A discloses a method for observing the water level of multiple layers of groundwater. Currently, in the water level survey of multiple layers of groundwater, a hydrogeological hole is drilled at the location to be measured; the drilling depth allows the hydrogeological hole to penetrate multiple layers of groundwater, and there are aquicludes between the aquifers of the multiple layers of groundwater and above the top aquifer; water measuring tubes with the same number of aquifer layers, i.e., observation channels, are placed in the hydrogeological hole. Water from the same aquifer enters the water measuring tube through the filter tube of the water measuring tube. Through the principle of communicating vessels, the water level in each water measuring tube represents the water level of the corresponding aquifer. However, when the underground depth is deep, it is difficult to directly observe the water level.

[0004] CN119714475A discloses a multi-layer groundwater level survey device and method. This device uses a foam ring floating on the water surface to contact a ring-shaped wireless touch controller to determine the highest water level. However, the foam ring is located outside the sampling tube and is susceptible to air flow and obstructions, causing it to rise and contact the wireless touch controller, leading to false readings. Summary of the Invention

[0005] In response to the above technical problems existing in the prior art, the present invention provides a multi-layer groundwater level surveying device and a surveying method thereof, which avoid or reduce the influence of airflow on water level surveying and improve surveying efficiency and accuracy.

[0006] The present invention discloses a multi-layer groundwater level survey device, comprising a surveyor, wherein a detection groove is provided at the lower end of the surveyor; a guide rod is longitudinally provided in the detection groove, and a float is slidably installed on the guide rod; a proximity switch cooperating with the float is provided on one side of the guide rod; and a water immersion sensor is provided on the side wall of the detection groove.

[0007] Preferably, the installation position of the water sensor is lower than the installation position of the proximity switch;

[0008] A limiting rod is provided at the lower end of the guide rod.

[0009] Preferably, a first counterweight block and a second counterweight ring are respectively provided on the upper and lower sides of the detection tank;

[0010] At least one balancing through hole extending toward the upper end of the surveyor is provided on the upper side of the detection slot.

[0011] Preferably, a first water tank is provided outside the detection tank.

[0012] The first water inlet of the first water tank is arranged on the upper side of the side wall of the detection tank, the first drain outlet is arranged on the lower side of the side wall of the detection tank, and a first electromagnetic valve is arranged on the first drain outlet.

[0013] Preferably, a second water tank is provided outside the first water tank.

[0014] The second water inlet of the second water tank is connected to the middle of the first water tank, and the second drain outlet extends toward the side wall of the detection tank; a second solenoid valve is provided on the second drain outlet.

[0015] Preferably, a first water level sensor and a second water level sensor are respectively provided on the side walls of the first water trough and the second water trough; and a swirl channel is also provided on the side wall of the first water trough.

[0016] Preferably, the surveyor comprises a head, a support part and a detection part connected in sequence; the detection slot is arranged at the lower end of the detection part; at least three groups of first passing wheels are arranged on the outer circumference of the head; and at least three groups of second passing wheels are arranged on the lower circumference of the support part.

[0017] Preferably, the support portion and the head are provided with an installation cavity, and the control module and the wireless module are installed in the installation cavity; and a hanging ring is provided at the upper end of the head.

[0018] Preferably, the present invention further comprises a reel and a base,

[0019] The base is installed on the upper side of the survey channel of the multi-layer groundwater foundation through foot pads;

[0020] A slewing bearing is provided on the base, and the reel is mounted on the inner ring of the slewing bearing;

[0021] A winding roller is provided in the winder, and an output end of a driving motor on one side of the winder is connected to a transmission shaft of the winding roller;

[0022] The winding roller is provided with a rope, one end of which is mounted on the lifting ring;

[0023] A locking mechanism is provided on one side of the reel;

[0024] The locking mechanism includes a side plate provided on the reel, and the side plate is mounted on the base via a locking pin;

[0025] The reel or the base is also provided with a control component; the control component is connected to the wireless module.

[0026] The present invention also provides a surveying method using the above surveying device, comprising the following steps:

[0027] Lowering the surveyor into the survey channel via a rope;

[0028] Determining whether a first condition is met: feedback signals from the proximity switch and the water sensor are received, and the water signal from the water sensor is stable within a first threshold time;

[0029] If the first condition is met: a first distance between the float and the lifting ring of the surveyor is obtained, and a second distance of the rope lowered is obtained;

[0030] The water level of multiple layers of groundwater is calculated according to the sum of the first distance and the second distance.

[0031] Compared with the prior art, the present invention has the following beneficial effects: by detecting the water surface through the proximity switch and the water immersion sensor, false detection caused by the float being blocked by air flow and obstacles when rising is avoided, thereby improving the accuracy and reliability of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the installation of the multi-layer groundwater level survey device of the present invention;

[0033] Figure 2 It is a cross-sectional view of the winder;

[0034] Figure 3 This is a schematic diagram of the structure of the surveyor;

[0035] Figure 4 It is a cross-sectional view of the surveyor;

[0036] Figure 5 It is a schematic diagram of the distribution of the first water tank and the second water tank;

[0037] Figure 6It is a diagram of the working principle of the survey device;

[0038] Figure 7 It is a flow chart of the survey method.

[0039] Markings in the figure: 1, survey equipment; 11, foundation; 12, survey channel;

[0040] 2. Winder; 21. Drive motor; 22. Winding roller; 23. Drive shaft; 25. Rope; 26. Locking mechanism; 27. Lock pin; 28. Side panel; 29. Control assembly;

[0041] 3. Base; 31. Slewing bearing; 32. Foot pad;

[0042] 5. Surveyor; 51. Head; 511. Lifting ring; 512. First passing wheel; 52. Balancing hole;

[0043] 53. Supporting part; 532. Second passing wheel; 533. Mounting cavity; 54. Detection part; 55. Control module; 551. Wireless module; 56. First counterweight;

[0044] 6. Detection tank; 61. Guide rod; 62. Float; 63. Limit rod; 65. Proximity switch; 66. Water sensor; 68. Second counterweight ring;

[0045] 7. First water tank; 71. First water inlet; 72. Swirl channel; 73. First drain outlet; 74. First solenoid valve; 75. First water level sensor;

[0046] 8. Second water tank; 81. Second water inlet; 82. Second drain outlet; 84. Second solenoid valve; 85. Second water level sensor. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, 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 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 making creative efforts shall fall within the scope of protection of the present invention.

[0048] The present invention is described in further detail below with reference to the accompanying drawings:

[0049] Example 1. Figure 1-6The multi-layer groundwater level survey device 1 includes a surveyor 5, a detection groove 6 is provided at the lower end of the surveyor 5; a guide rod 61 is longitudinally provided in the detection groove 6, and a float 62 is slidably installed on the guide rod 61; a proximity switch 65 cooperating with the float 62 is provided on one side of the guide rod 61; a water immersion sensor 66 is provided on the side wall of the detection groove 6.

[0050] The water surface is detected by the proximity switch 65 and the water immersion sensor 66 to avoid misdetection caused by the float 62 being blocked by air flow and obstacles, thereby improving the accuracy and reliability of detection.

[0051] More specifically, Figure 4 and Figure 5 The installation position of the water sensor 66 is lower than that of the proximity switch 65, improving the detection accuracy of the water sensor 66 and preventing the water surface from always passing over the water sensor. A limit rod 63 is provided at the lower end of the guide rod 61. The limit rod 63 is fixed to the side wall of the detection tank 6 to reduce the possibility of the float 62 being blocked by obstacles.

[0052] A first counterweight 56 and a second counterweight ring 68 are provided on the upper and lower sides of the detection tank 6, respectively, to maintain the orientation of the surveyor 5 and prevent it from tipping over. At least one balancing hole 52 is provided on the upper side of the detection tank 6, extending toward the upper end of the surveyor 5. This hole is used to eliminate air pressure and air resistance from below, thereby improving detection accuracy and reducing the possibility of the surveyor 5 being unable to be lowered due to air resistance from below.

[0053] A first water tank 7 is provided outside the detection tank 6 for sampling water samples. A first water inlet 71 of the first water tank 7 is provided on the upper side of the side wall of the detection tank 6, and a first drain port 73 is provided on the lower side of the side wall of the detection tank 6. A first solenoid valve 74 is provided on the first drain port 73, and the sample in the first water tank 7 can be discharged through the first drain port 73 and the first solenoid valve 74.

[0054] Example 2. Unlike Example 1, two water tanks are provided: a second water tank 8 is provided outside the first water tank 7. The second water inlet 81 of the second water tank 8 is connected to the middle of the first water tank 7, and the second drain outlet 82 extends toward the side wall of the detection tank 6. A second solenoid valve 84 is provided on the second drain outlet 82. After impurities in the water sample settle in the first water tank 7, the clean water in the middle enters the second water tank 8 through the second water inlet 81, thereby purifying the water. Impurities can be discharged from the first drain outlet 73 as needed. The second water inlet 81 of the second water tank 8 can also be provided with a third solenoid valve.

[0055] More specifically, a first water level sensor 75 and a second water level sensor 85 are respectively provided on the side walls of the first water tank 7 and the second water tank 8, which are used to detect the water intake amount. The signals can also be compared with the detection signals of the water immersion sensor to judge the water surface conditions and avoid misdetection due to partial water mist or splashes.

[0056] Optionally, a vortex channel 72 is further provided on the side wall of the first water tank 7. After the incoming water rotates along the vortex channel 72, the impurity density is relatively high, and the impurities can be separated. After separation, the impurities are deposited on the lower side of the first water tank 7.

[0057] like Figure 3 The surveyor 5 includes a head 51 , a supporting portion 53 and a detecting portion 54 which are connected in sequence; the detecting slot 6 is provided at the lower end of the detecting portion 54 .

[0058] Embodiment 3. The outer circumference of the head 51 of the surveyor 5 is provided with at least three sets of first passing wheels 512; the lower circumference of the support portion 53 is provided with at least three sets of second passing wheels 532 to improve the passability.

[0059] During the lowering of the surveyor 5, the second pass-through wheel 532 improves the passability of the support portion 53. During the recovery of the surveyor 5, air or water flow may prevent the surveyor 5 from aligning with the lower end of the survey channel 12. Continued upward movement allows the conical structure of the head 51 and the first pass-through wheel 512 to effectively enter the survey channel 12, improving the recovery rate of the surveyor 5. An inclined transition portion is provided between the support portion and the detection portion, and the second pass-through wheel 532 is mounted on this transition portion.

[0060] Figure 4 and Figure 5 The mounting cavity 533 is shown provided on the support portion 53 and the head portion 51. The control module 55 and the wireless module 551 are mounted in the mounting cavity 533. A hanging ring 511 is provided at the upper end of the head portion 51. However, the mounting cavity 533 is not limited thereto. Necessary electrical components such as batteries may also be mounted in the mounting cavity 533.

[0061] Figure 6 A control mode diagram is shown, in which the control component 29 on the reel 2 or the base 3 is connected to the control module 55 through a wireless module 551, and is used to receive signals from the proximity switch 65, the water immersion sensor 66, the first water level sensor 75, and the second water level sensor 85, and is also used to control the first solenoid valve 74 and the second solenoid valve 84.

[0062] like Figure 1 and Figure 2The base 3 is mounted on the upper side of the survey channel 12 of the multi-layer groundwater foundation 11 via foot pads 32. A slewing bearing 31 is provided on the base 3, and the reel 2 is mounted on the inner ring of the slewing bearing 31. A reel 2 is provided within the reel 2, and the output end of the drive motor 21 on one side of the reel 2 is connected to the drive shaft 23 of the reel 2. A rope 25 is provided on the reel 22, and one end of the rope 25 is mounted on the lifting ring 511. A locking mechanism 26 is provided on one side of the reel 2. The locking mechanism 26 includes a side plate 28 provided on the reel 2, which is mounted on the base 3 via a locking pin 27. A control assembly 29 is also provided on the reel 2 or the base 3. The control assembly 29 is connected to the wireless module 551. The control assembly 29 is also used to control the drive motor, thereby controlling the lowering or retrieval of the surveyor 5. When it is difficult to recover the surveyor 5 , the reel 2 can be rotated to provide rotational tension for the surveyor 5 to help the surveyor 5 escape from obstacles.

[0063] More specifically, one end of the rope 25 passes through the through hole of the inner ring of the slewing bearing 31 and extends downward.

[0064] Example 4. Figure 7 The surveying method using the surveying device 1 includes the following steps:

[0065] Step S1: lowering the surveyor 5 into the survey channel 12 via a rope.

[0066] Step S2: Determine whether the first condition is met: the feedback signal from the proximity switch 65 and the water immersion signal from the water immersion sensor 66 are received, and the water immersion signal is stable within the first threshold time. Specifically, the proximity switch 65 detects the detection signal of the iron sheet on the float 62, and the water immersion signal from the water immersion sensor 66 is detected.

[0067] If the first condition is met, step S3 is executed: a first distance between the float 62 and the lifting ring 511 of the surveyor 5 is obtained, and a second distance of the rope lowering is obtained, and step S5 is executed.

[0068] The first distance can be measured by actual detection and can only be provided when the surveyor 5 is designed and produced; the second distance can be actually measured.

[0069] If the first condition is not met, step S4 is executed: continuously monitoring the signals of the proximity switch 65 and the water sensor 66 .

[0070] Step S5: Calculating the water level of multiple layers of groundwater according to the sum of the first distance and the second distance.

[0071] The first condition is not limited thereto, and may also include feedback signals from the first water level sensor 75 and / or the second water level sensor 85 . The feedback time of the first water level sensor 75 and the second water level sensor 85 lags behind that of the proximity switch 65 and the water immersion sensor 66 .

[0072] In some of the processes described in the specification of this application and the above-mentioned figures, multiple operations that appear in a specific order are included, but it should be clearly understood that these operations may not be executed in the order in which they appear in this article or may be executed in parallel. The serial numbers of the operations, such as S1, S2, etc., are only used to distinguish between different operations, and the serial numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations may be executed in sequence or in parallel. It should be noted that the descriptions of "first", "second", etc. in this article are used to distinguish different messages, devices, modules, etc., and do not represent the order of precedence, nor do they limit "first" and "second" to different types. It should also be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0073] The surveying device 1 of the present invention avoids erroneous detection caused by obstacles by arranging the float 62 in the inner detection groove; avoids erroneous detection caused by airflow by cooperating with the proximity switch 65 and the water immersion sensor 66; improves the accuracy and reliability of water level survey; and balances the pressure difference between the upper and lower sides through the balancing through-hole 52, keeps the water level rising, and can also reduce the air resistance of the lowering of the surveyor 5.

[0074] The first and second water tanks 7 and 8 are used to sample water from multiple layers, and the first water tank is used to perform preliminary water purification on the water samples. The shape of the head and the design of two sets of passing wheels improve the passability of the lowering and ascending, thereby increasing the recovery rate of the surveyor.

[0075] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A multi-layer groundwater level survey device, characterized in that: It comprises a surveyor (5), wherein the lower end of the surveyor (5) is provided with a detection slot (6); A guide rod (61) is longitudinally provided in the detection groove (6), and a float (62) is slidably mounted on the guide rod (61); A proximity switch (65) that matches the float (62) is provided on one side of the guide rod (61); A water immersion sensor (66) is provided on the side wall of the detection tank (6).

2. The multi-layer groundwater level survey device according to claim 1, characterized in that: The installation position of the water immersion sensor (66) is lower than the installation position of the proximity switch (65); A limiting rod (63) is provided at the lower end of the guide rod (61).

3. The multi-layer groundwater level survey device according to claim 1, characterized in that: A first counterweight block (56) and a second counterweight ring (68) are respectively provided on the upper and lower sides of the detection tank (6); At least one balancing through hole (52) extending toward the upper end of the surveyor (5) is provided on the upper side of the detection slot (6).

4. The multi-layer groundwater level survey device according to claim 1, characterized in that: A first water tank (7) is provided outside the detection tank (6). The first water inlet (71) of the first water tank (7) is arranged on the upper side of the side wall of the detection tank (6), the first drain outlet (73) is arranged on the lower side of the side wall of the detection tank (6), and a first electromagnetic valve (74) is arranged on the first drain outlet (73).

5. The multi-layer groundwater level survey device according to claim 4, characterized in that: A second water tank (8) is provided outside the first water tank (7). The second water inlet (81) of the second water tank (8) is connected to the middle of the first water tank (7), and the second drain outlet (82) extends toward the side wall of the detection tank (6); a second solenoid valve (84) is provided on the second drain outlet (82).

6. The multi-layer groundwater level survey device according to claim 5, characterized in that: A first water level sensor (75) and a second water level sensor (85) are respectively provided on the side walls of the first water tank (7) and the second water tank (8); A swirling channel (72) is also provided on the side wall of the first water tank (7).

7. The multi-layer groundwater level surveying device according to claim 4, characterized in that: The surveyor (5) comprises a head (51), a support part (53) and a detection part (54) connected in sequence; The detection groove (6) is arranged at the lower end of the detection portion (54); At least three groups of first passing wheels (512) are arranged on the outer circumference of the head (51); At least three groups of second passing wheels (532) are circumferentially arranged on the lower side of the support portion (53).

8. The multi-layer groundwater level surveying device according to claim 7, characterized in that: The support portion (53) and the head portion (51) are provided with an installation cavity (533), and the control module (55) and the wireless module (551) are installed in the installation cavity (533); A hanging ring (511) is provided at the upper end of the head (51).

9. The multi-layer groundwater level surveying device according to claim 8, characterized in that: It also includes a reel (2) and a base (3), The base (3) is installed on the upper side of the survey channel (12) of the multi-layer groundwater foundation (11) through the foot pad (32); A rotary bearing (31) is provided on the base (3), and the reel (2) is mounted on the inner ring of the rotary bearing (31); A winding roller (22) is provided in the winding device (2), and an output end of a driving motor (21) on one side of the winding device (2) is connected to a transmission shaft (23) of the winding roller (22); The winding roller (22) is provided with a rope (25), and one end of the rope (25) is mounted on the hanging ring (511); A locking mechanism (26) is provided on one side of the reel (2); The locking mechanism (26) comprises a side plate (28) provided on the reel (2), and the side plate (28) is mounted on the base (3) via a locking pin (27); A control component (29) is also provided on the reel (2) or the base (3); the control component (29) is connected to the wireless module (551).

10. A surveying method using the multi-layer groundwater level surveying device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Lowering the surveyor into the survey channel via a rope; Determining whether a first condition is met: feedback signals from the proximity switch and the water sensor are received, and the water signal from the water sensor is stable within a first threshold time; If the first condition is met: a first distance between the float and the lifting ring of the surveyor is obtained, and a second distance of the rope lowered is obtained; The water level of multiple layers of groundwater is calculated according to the sum of the first distance and the second distance.

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