Underground water level monitoring device and monitoring method

Abstract

The invention relates to the technical field of liquid level measurement, in particular to an underground water level monitoring device and method.The monitoring device comprises a probe assembly and a displayer, the probe assembly comprises a liquid level pipe, a water inlet head and a pressure diaphragm, the pressure diaphragm serves as a mechanical sensor and can detect water pressure signals, and the water inlet head is rotationally installed at one end of the liquid level pipe; the liquid level pipe is provided with a driving motor to drive the water inlet head to rotate, a first liquid hole and a second liquid hole are formed in the water inlet head, one end of the first liquid hole and one end of the second liquid hole are located in the outer wall of the water inlet head, and the other end of the first liquid hole and the other end of the second liquid hole are located in the end face, facing the pressure diaphragm, of the water inlet head. A flow deflector is arranged on the end face, facing the pressure diaphragm, of the water inlet head, and when the driving motor drives the water inlet head to rotate, underground water flows towards the pressure diaphragm through the first liquid hole or the second liquid hole and flushes the pressure diaphragm. The technical problem that the monitoring precision is affected by impurities on the surface of the pressure diaphragm in the prior art is solved.

Description

A groundwater level monitoring device and monitoring method Technical Field

[0001] This invention relates to the field of liquid level measurement technology, specifically to a groundwater level monitoring device and monitoring method. Background Technology

[0002] With the development of digital technology, its application in people's lives is becoming increasingly widespread. For example, in the process of groundwater level monitoring, groundwater level monitoring devices with mechanical sensors are usually used to monitor the groundwater level. The groundwater level monitoring device mainly includes a probe assembly and a display assembly. A cable connects the probe assembly and the display assembly. The probe assembly is used to extend into the bottom of the groundwater. The probe assembly contains a mechanical sensor that can detect the water pressure of the groundwater. The mechanical sensor includes a pressure diaphragm. After the pressure diaphragm comes into contact with the groundwater, it can sense the water pressure. The mechanical sensor transmits the sensed water pressure value to the display assembly through the cable, and the display assembly displays the value. Different depths of groundwater correspond to different water pressure values. Therefore, the groundwater level monitoring device can measure the depth of the groundwater based on the different water pressure values ​​detected by the mechanical sensor.

[0003] Since the probe assembly extends into the bottom of the groundwater, impurities easily adhere to the surface of the pressure diaphragm after it comes into contact with the groundwater, which affects the accuracy of the mechanical sensor in detecting water pressure and causes a large monitoring error. Therefore, a groundwater level monitoring device with a self-cleaning function is needed. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a groundwater level monitoring device and method to solve the technical problem that impurities on the surface of the pressure diaphragm affect the monitoring accuracy in existing technologies.

[0005] The present invention provides a groundwater level monitoring device and method, which adopts the following technical solution: A groundwater level monitoring device includes a probe assembly and a display. The probe assembly includes a level tube, an inlet head, and a pressure diaphragm. One end of the level tube is connected to the display via a cable. The inlet head is rotatably mounted on the other end of the level tube. The pressure diaphragm is located inside the level tube. A drive motor is provided on the level tube. The drive motor is connected to the inlet head to drive the inlet head to rotate. A first liquid hole and a second liquid hole are provided inside the inlet head. One end of the first liquid hole and the second liquid hole is located on the outer wall of the inlet head, and the other end is located on the end face of the inlet head facing the pressure diaphragm. A guide plate is provided on the end face of the inlet head facing the pressure diaphragm. When the drive motor drives the inlet head to rotate, groundwater flows through the first liquid hole or the second liquid hole toward the pressure diaphragm and washes the pressure diaphragm.

[0006] Furthermore, both the first liquid hole and the second liquid hole extend spirally around the central axis of the inlet head, the number of the first liquid hole and the second liquid hole are the same, and the first liquid hole and the second liquid hole are alternately distributed along the circumferential interval of the inlet head.

[0007] Furthermore, the first liquid hole and the second liquid hole have an inner end opening on the end face of the inlet head and an outer end opening on the outer wall of the inlet head. The outer end openings of the first liquid hole and the second liquid hole are evenly spaced along the circumference of the inlet head. The inner end openings of the first liquid hole and the second liquid hole are staggered along the radial direction of the inlet head. The inner end opening of the first liquid hole is located on the side of the inner end opening of the second liquid hole away from the center of the inlet head.

[0008] Furthermore, multiple guide vanes are evenly spaced around the central axis of the inlet head, and the multiple guide vanes are distributed in a spiral radial pattern. The inner end opening of the first liquid hole is located on the periphery of each guide vane, and the inner end opening of the second liquid hole is located on the inner periphery of each guide vane.

[0009] Furthermore, a gear ring is fixed to one end of the inlet head facing the liquid level tube, the drive motor is located on the outside of the liquid level tube, and a drive gear is connected to the output shaft of the drive motor. The drive gear meshes with the gear ring to realize the drive motor and the inlet head transmission connection.

[0010] Furthermore, a protective cover is fitted around the water inlet head and the liquid level pipe. One end of the protective cover has a through hole through which the output shaft of the drive motor passes. The drive motor is located outside the protective cover, and the output shaft of the drive motor passes through the through hole. The gear ring and the drive gear are located inside the protective cover.

[0011] Furthermore, a support column is fixed inside the liquid level tube, and an installation sleeve is rotatably installed around the support column. The installation sleeve is formed by two semi-circular sleeves joining together. The two semi-circular sleeves cover the support column and are fixed by fastening rings. The outer circumference of the installation sleeve is provided with external threads, and the end of the water inlet facing the installation sleeve is provided with an internal thread sleeve. The installation sleeve and the water inlet are connected by the external thread and the internal thread sleeve. The pressure diaphragm is installed on the end of the support column facing the water inlet.

[0012] Furthermore, a locking screw is connected to the side wall of the liquid level tube. When the water inlet head is screwed to the mounting sleeve, the locking screw and the mounting sleeve are tightly engaged to prevent the mounting sleeve from rotating relative to the liquid level tube.

[0013] Furthermore, an installation groove is provided on the end face of the inlet head away from the liquid inlet pipe. A limiting cone is movably installed in the installation groove. The limiting cone has drilling threads on its periphery. The limiting cone can move along the central axis of the inlet head. A limiting post is provided at one end of the limiting cone in the installation groove. A limiting hole corresponding to the limiting post is provided at the bottom of the installation groove. When the limiting cone moves along the central axis of the inlet head toward the liquid level pipe, the limiting post is inserted into the limiting hole, so that the limiting cone and the inlet head are in anti-rotation engagement. When the inlet head rotates, it drives the limiting cone to rotate synchronously, so that the limiting cone drills downward into the bottom of the groundwater.

[0014] A groundwater level monitoring method using the aforementioned groundwater level monitoring device includes the following steps: inserting a probe assembly vertically into the groundwater; the probe assembly monitoring the groundwater level by sensing water pressure; and when the drive motor rotates the inlet head, groundwater flows through a first or second liquid hole toward the pressure diaphragm and washes the pressure diaphragm.

[0015] The beneficial effects of the present invention are as follows: The groundwater level monitoring device and method of the present invention have a rotatable water inlet head set at one end of the liquid level pipe. When the water inlet head rotates, it pushes the groundwater to flow and washes the pressure diaphragm, thereby achieving self-cleaning. In this way, when the probe assembly is in the groundwater for a long time, the water inlet head can be driven by the drive motor to rotate to achieve the self-cleaning effect, reducing the impact of impurities adhering to the surface of the pressure diaphragm on the monitoring accuracy.

[0016] In addition, by setting a first liquid hole and a second liquid hole, the present invention can perform forward and reverse flushing of the pressure diaphragm when the drive motor rotates forward and reverse. In actual use, the pressure diaphragm can be flushed in reverse by controlling the forward and reverse rotation of the drive motor, thereby improving the cleaning effect.

[0017] In addition, the present invention provides a limiting cone at the end of the inlet head. During use, when the probe assembly is in a vertical position at the bottom of the groundwater, the limiting cone is compressed after contacting the bottom of the water. The limiting cone moves along the central axis of the inlet head toward the liquid level pipe, that is, the limiting cone extends upward into the mounting groove. The limiting post is inserted into the limiting hole, so that the limiting cone and the inlet head are in anti-rotation engagement. When the inlet head rotates, it drives the limiting cone to rotate synchronously, so that the limiting cone drills downward into the silt at the bottom of the groundwater. This helps the liquid level pipe maintain a vertical state and improves the stability of the probe assembly underwater. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Those skilled in the art should understand that these drawings are not necessarily drawn to scale.

[0019] Figure 1 is a perspective view of a first embodiment of the groundwater level monitoring device of the present invention; Figure 2 is another perspective view of a first embodiment of the groundwater level monitoring device of the present invention; Figure 3 is a front view of the probe assembly in a first embodiment of the groundwater level monitoring device of the present invention; Figure 4 is a cross-sectional view along AA in Figure 3; Figure 5 is an enlarged view of part C in Figure 4; Figure 6 is an enlarged view of part D in Figure 4; Figure 7 is an exploded view of the probe assembly in a first embodiment of the groundwater level monitoring device of the present invention; Figure 8 is an enlarged view of part E in Figure 7; Figure 9 is a perspective view of the inlet head in a first embodiment of the groundwater level monitoring device of the present invention; Figure 10 is another perspective view of the inlet head in a first embodiment of the groundwater level monitoring device of the present invention; Figure 11 is a front view of the inlet head in a first embodiment of the groundwater level monitoring device of the present invention; Figure 12 is a cross-sectional view along BB in Figure 11.

[0020] In the diagram: 100, liquid level tube; 1001, drive motor; 101, water inlet head; 1011, mounting groove; 1012, gear ring; 1013, limiting hole; 1014, first liquid hole; 1015, second liquid hole; 1016, internal thread sleeve; 1017, guide vane; 102, limiting cone; 1022, limiting ring; 1023, limiting post; 103, protective cover; 104, locking screw; 105, cable; 106, display; 107, mounting sleeve; 1071, fastening ring; 108, pressure diaphragm; 110, support post. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] A first embodiment of a groundwater level monitoring device of the present invention is shown in Figures 1 to 12. The groundwater level monitoring device includes a probe assembly and a display 106, which are connected by a cable 105. In use, the probe assembly is vertically inserted into the groundwater from top to bottom until it reaches the bottom. The probe assembly contains a mechanical sensor that detects water pressure, allowing the probe assembly to monitor the groundwater level based on the sensed water pressure. The display 106 is positioned above the groundwater surface, and the probe assembly displays the monitored groundwater level information on the display 106, thereby achieving the purpose of monitoring the groundwater level.

[0025] In this invention, the probe assembly includes a level tube 100, an inlet head 101, and a pressure diaphragm 108, the pressure diaphragm 108 being used to sense the water pressure value of groundwater. In this embodiment, the connection structure between the inlet head 101, the level tube 100, and the pressure diaphragm 108 is as follows: one end of the level tube 100 is connected to a display 106 via a cable 105, and the inlet head 101 is rotatably mounted on the other end of the level tube 100. A drive motor 1001 is provided on the level tube 100, and the drive motor 1001 is drively connected to the inlet head 101 to drive the inlet head 101 to rotate. The pressure diaphragm 108 is located inside the level tube 100 and is arranged opposite to the inlet head 101. When the inlet head 101 rotates, the water on the surface of the pressure diaphragm 108 flows, carrying away impurities and dust from the surface of the pressure diaphragm 108.

[0026] A support column 110 is coaxially fixed inside the liquid level tube 100, and an installation sleeve 107 is rotatably mounted on the periphery of the support column 110. Specifically, the installation sleeve 107 is formed by two separate semi-circular sleeves that fit together. During installation, the two semi-circular sleeves cover the periphery of the support column 110, and one end of the two semi-circular sleeves is fixed by a fastening ring 1071, thereby allowing the installation sleeve 107 to rotatably fit around the support column 110. The installation sleeve 107 can rotate relative to the support column 110. The outer periphery of the installation sleeve 107 is provided with an external thread, and the end of the water inlet head 101 facing the installation sleeve 107 is provided with an internal thread sleeve 1016. The installation sleeve 107 and the water inlet head 101 are screwed together through the external thread and the internal thread sleeve 1016, and the water inlet head 101 is rotatably mounted on the support column 110 through the installation sleeve 107. The pressure diaphragm 108 is installed at one end of the support column 110 facing the inlet head 101. When the inlet head 101 rotates, the pressure diaphragm 108 and the support column 110 do not rotate with the inlet head 101.

[0027] In this embodiment, the drive motor 1001 is disposed outside the liquid level tube 100. A drive gear is connected to the output shaft of the drive motor 1001. A gear ring 1012 is fixed to one end of the inlet head 101 facing the liquid level tube 100. The gear ring 1012 is coaxially arranged with the internal threaded sleeve 1016 and is located outside the internal threaded sleeve 1016. The gear ring 1012 meshes with the drive gear to realize the transmission connection between the drive motor 1001 and the inlet head 101. In this embodiment, a protective cover 103 is sleeved around the inlet head 101 and the liquid level tube 100. One end of the protective cover 103 has a through hole for the output shaft of the drive motor 1001 to pass through. The drive motor 1001 is located outside the protective cover 103, and the output shaft of the drive motor 1001 passes through the through hole. The gear ring 1012 and the drive gear are located inside the protective cover 103. In this embodiment, the level tube 100 includes an outer tube, and the support column 110 is coaxially fixed inside the outer tube. When the inlet head 101 is installed on the level tube 100, the outer tube is inserted between the toothed ring 1012 and the internal threaded sleeve 1016. The mounting sleeve 107 is rotatably installed around the support column 110, and the internal threaded sleeve 1016 is screwed to the mounting sleeve 107. To prevent the mounting sleeve 107 from rotating relative to the level tube 100 when the inlet head 101 is screwed to the mounting sleeve 107, a locking screw 104 is connected to the side wall of the level tube 100. When the inlet head 101 is screwed to the mounting sleeve 107, the locking screw 104 engages tightly with the mounting sleeve 107 to prevent the mounting sleeve 107 from rotating relative to the level tube 100.

[0028] In this invention, the inlet head 101 is provided with a first liquid hole 1014 and a second liquid hole 1015. One end of the first liquid hole 1014 and the second liquid hole 1015 is located on the outer wall of the inlet head 101, and the other end is located on the end face of the inlet head 101 facing the pressure diaphragm 108. A guide plate 1017 is provided on the end face of the inlet head 101 facing the pressure diaphragm 108. The pressure diaphragm 108 faces the inlet head 101. When the drive motor 1001 drives the inlet head 101 to rotate, groundwater flows through the first liquid hole 1014 or the second liquid hole 1015 toward the pressure diaphragm 108 and washes the pressure diaphragm 108, thereby washing away impurities attached to the surface of the pressure diaphragm 108 and ensuring the monitoring accuracy of the pressure diaphragm 108. In this invention, a rotatable water inlet head 101 is provided at one end of the liquid level tube 100. When the water inlet head 101 rotates, it pushes the groundwater to flow and flushes the pressure diaphragm 108, thus achieving self-cleaning. In this way, when the probe assembly is in groundwater for a long time, the water inlet head 101 can be driven to rotate by the drive motor 1001 to achieve the effect of self-cleaning, reducing the impact of impurities adhering to the surface of the pressure diaphragm 108 on the monitoring accuracy.

[0029] In this embodiment, both the first liquid hole 1014 and the second liquid hole 1015 are spiral hole structures, extending spirally around the central axis of the inlet head 101. In this embodiment, by extending the length of the first liquid hole 1014 and the second liquid hole 1015, the path of groundwater flow in the first liquid hole 1014 and the second liquid hole 1015 is lengthened. Furthermore, due to the spiral arrangement of the first liquid hole 1014 and the second liquid hole 1015, the spiral flow of groundwater in the first liquid hole 1014 and the second liquid hole 1015 generates centrifugal force. The increased flow path means that impurities have a larger contact area with the inner walls of the first liquid hole 1014 and the second liquid hole 1015 as they flow through. This results in a greater amount of impurities adhering to the inner walls of the first liquid hole 1014 and the second liquid hole 1015. Combined with the centrifugal force acting on the groundwater, larger impurities will adhere to the inner walls of the first liquid hole 1014 and the second liquid hole 1015, thus reducing the amount of impurities entering the area around the pressure diaphragm 108 to some extent. The number of the first liquid holes 1014 and the second liquid holes 1015 are the same, and the first liquid holes 1014 and the second liquid holes 1015 are alternately distributed along the circumference of the inlet head 101. In this embodiment, the end opening of the first liquid holes 1014 and the second liquid holes 1015 on the end face of the inlet head 101 is defined as the inner end opening, and the end opening on the outer wall of the inlet head 101 is defined as the outer end opening. The outer end openings of the first liquid holes 1014 and the second liquid holes 1015 are evenly distributed along the circumference of the inlet head 101. The inner end openings of the first liquid holes 1014 and the second liquid holes 1015 are staggered along the radial direction of the inlet head 101. The inner end opening of the first liquid hole 1014 is located on the side of the inner end opening of the second liquid hole 1015 away from the center of the inlet head 101.

[0030] In this embodiment, multiple guide vanes 1017 are evenly spaced around the central axis of the inlet head 101, and the multiple guide vanes 1017 are distributed in a spiral radial pattern. In this embodiment, the spiral direction of the multiple guide vanes 1017 is clockwise (as seen in Figure 10). Of course, in other embodiments, the spiral direction of the multiple guide vanes 1017 can also be counterclockwise. The inner end opening of the first liquid hole 1014 is located on the periphery of each guide vane 1017, and the inner end opening of the second liquid hole 1015 is located on the inner periphery of each guide vane 1017. At the same time, the inner end openings of the first liquid hole 1014 and the second liquid hole 1015 are inclined in opposite directions, that is, the inner end opening of the first liquid hole 1014 is inclined towards the center of the inlet head 101, and the inner end opening of the second liquid hole 1015 is inclined away from the center of the inlet head 101. With this configuration, when the drive motor 1001 rotates the inlet head 101, the guide plate 1017 will push the groundwater around the pressure diaphragm 108 to flow. The flow path of the groundwater is roughly as follows: taking Figure 10 as an example, when the inlet head 101 rotates clockwise, the guide plate 1017 will push the groundwater around the pressure diaphragm 108 to flow towards the center of the inlet head 101. That is, the guide plate 1017 will drive the groundwater at the inner end of the first liquid hole 1014 to flow towards the inner end of the second liquid hole 1015, thereby causing the groundwater in the first liquid hole 1014 to flow towards the second liquid hole 1015. During the flow, the groundwater will wash the surface of the pressure diaphragm 108, thereby carrying away impurities on the surface of the pressure diaphragm 108. Conversely, when the inlet head 101 rotates counterclockwise, the guide vane 1017 pushes the groundwater around the pressure diaphragm 108 to flow away from the center of the inlet head 101. In other words, the guide vane 1017 drives the groundwater at the inner end of the second liquid hole 1015 to flow towards the inner end of the first liquid hole 1014, thereby causing the groundwater in the second liquid hole 1015 to flow towards the first liquid hole 1014. This means the groundwater performs a reverse flushing of the pressure diaphragm 108. In actual use, the reverse flushing effect on the pressure diaphragm 108 can be achieved by controlling the forward and reverse rotation of the drive motor 1001.

[0031] In this embodiment, an installation groove 1011 is provided on the end face of the water inlet head 101 facing away from the liquid inlet pipe. A limiting cone head 102 is movably installed in the installation groove 1011. One end of the limiting cone head 102 extends into the installation groove 1011. A limiting ring 1022 is fixed at the opening of the installation groove 1011 to prevent the limiting cone head 102 from falling out of the installation groove 1011. The periphery of the limiting cone head 102 is provided with drilling threads. The limiting cone head 102 can move along the central axis of the water inlet head 101. A limiting post 1023 is provided at one end of the limiting cone head 102 in the installation groove 1011. A limiting hole 1013 corresponding to the limiting post 1023 is provided at the bottom of the installation groove 1011. When in use, when the probe assembly is in a vertical position at the bottom of the groundwater, the limiting cone 102 is compressed after contacting the bottom of the water. The limiting cone 102 moves along the central axis of the inlet head 101 towards the liquid level pipe 100, that is, the limiting cone 102 will penetrate upward into the installation groove 1011. The limiting post 1023 is inserted into the limiting hole 1013, so that the limiting cone 102 and the inlet head 101 are in anti-rotation engagement. When the inlet head 101 rotates, it drives the limiting cone 102 to rotate synchronously, so that the limiting cone 102 drills downward into the silt at the bottom of the groundwater. This helps the liquid level pipe 100 maintain a vertical state and improves the stability of the probe assembly underwater.

[0032] It should be noted that the difference between the present invention and the prior art lies in the structure of the probe assembly. The structure of the display 106 is the same as that in the prior art. Therefore, the present invention will only focus on describing the structure of the probe assembly.

[0033] This invention utilizes a monitoring method for the aforementioned groundwater level monitoring device. This groundwater level monitoring method includes the following steps: The probe assembly is vertically inserted into the groundwater from top to bottom until it reaches the bottom. When the probe assembly reaches the bottom, the limiting cone 102 at the lowest end of the probe assembly contacts the bottom and is compressed. The limiting cone 102 extends upwards into the mounting groove 1011, and the limiting post 1023 is inserted into the limiting hole 1013, causing the limiting cone 102 to engage with the inlet head 101 to prevent rotation. Then, the drive motor 1001 drives the inlet head 101 to rotate, and the inlet head 101 drives the limiting cone 102 to rotate synchronously, causing the limiting cone 102 to drill downwards into the silt at the bottom of the groundwater. This helps the level tube 100 maintain a vertical position and improves the stability of the probe assembly underwater. The pressure diaphragm 108 inside the probe assembly monitors the groundwater level by sensing water pressure. The monitored water level information is transmitted via cable 105 and then displayed on display 106. When the probe assembly is immersed in groundwater for a long time, impurities will adhere to the surface of the pressure diaphragm 108, causing abnormal data displayed on display 106. In this case, the pressure diaphragm 108 inside the probe assembly needs to be cleaned. The drive motor 1001 is controlled to rotate, which drives the water inlet head 101 to rotate. When the water inlet head 101 rotates, the guide plate 1017 pushes the groundwater through the first liquid hole 1014 or the second liquid hole 1015 towards the pressure diaphragm 108 and flushes the pressure diaphragm 108. Specifically, taking Figure 10 as an example, when the inlet head 101 rotates clockwise, the guide plate 1017 will push the groundwater around the pressure diaphragm 108 to flow towards the center of the inlet head 101. That is, the guide plate 1017 will drive the groundwater at the inner end of the first liquid hole 1014 to flow towards the inner end of the second liquid hole 1015, thereby causing the groundwater in the first liquid hole 1014 to flow towards the second liquid hole 1015. During the flow, the groundwater will wash the surface of the pressure diaphragm 108, thereby removing impurities from the surface of the pressure diaphragm 108. Conversely, when the inlet head 101 rotates counterclockwise, the guide vane 1017 pushes the groundwater around the pressure diaphragm 108 to flow away from the center of the inlet head 101. In other words, the guide vane 1017 drives the groundwater at the inner end of the second liquid hole 1015 to flow towards the inner end of the first liquid hole 1014, thereby causing the groundwater in the second liquid hole 1015 to flow towards the first liquid hole 1014. This means the groundwater performs a reverse flushing of the pressure diaphragm 108. In actual use, the reverse flushing effect on the pressure diaphragm 108 can be achieved by controlling the forward and reverse rotation of the drive motor 1001.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A groundwater level monitoring device, comprising a probe assembly and a display (106), characterized in that, The probe assembly includes a level tube (100), an inlet head (101), and a pressure diaphragm (108). One end of the level tube (100) is connected to a display (106) via a cable (105). The inlet head (101) is rotatably mounted on the other end of the level tube (100). The pressure diaphragm (108) is located inside the level tube (100). A drive motor (1001) is provided on the level tube (100), and the drive motor (1001) is connected to the inlet head (101) to drive the inlet head (101) to rotate. A first liquid level is formed inside the inlet head (101). The first liquid hole (1014) and the second liquid hole (1015) are located on the outer wall of the inlet head (101) and on the end face of the inlet head (101) facing the pressure diaphragm (108). The inlet head (101) is provided with a guide plate (1017) on the end face of the inlet head (101) facing the pressure diaphragm (108). When the drive motor (1001) drives the inlet head (101) to rotate, the groundwater flows through the first liquid hole (1014) or the second liquid hole (1015) towards the pressure diaphragm (108) and flushes the pressure diaphragm (108).

2. The groundwater level monitoring device according to claim 1, characterized in that: The first liquid hole (1014) and the second liquid hole (1015) both extend spirally around the central axis of the water inlet head (101). The number of the first liquid hole (1014) and the second liquid hole (1015) are the same, and the first liquid hole (1014) and the second liquid hole (1015) are alternately distributed along the circumferential interval of the water inlet head (101).

3. The groundwater level monitoring device according to claim 2, characterized in that: The first liquid hole (1014) and the second liquid hole (1015) have an inner end opening on the end face of the inlet head (101) and an outer end opening on the outer wall of the inlet head (101). The outer end openings of the first liquid hole (1014) and the second liquid hole (1015) are evenly spaced along the circumference of the inlet head (101). The inner end openings of the first liquid hole (1014) and the second liquid hole (1015) are staggered along the radial direction of the inlet head (101). The inner end opening of the first liquid hole (1014) is located on the side of the inner end opening of the second liquid hole (1015) away from the center of the inlet head (101).

4. The groundwater level monitoring device according to claim 3, characterized in that: The guide vanes (1017) are evenly spaced around the central axis of the inlet head (101), and the multiple guide vanes (1017) are distributed in a spiral radial pattern. The inner end orifice of the first liquid hole (1014) is located on the periphery of each guide vane (1017), and the inner end orifice of the second liquid hole (1015) is located on the inner periphery of each guide vane (1017).

5. The groundwater level monitoring device according to claim 4, characterized in that: A gear ring (1012) is fixed at one end of the inlet head (101) facing the liquid level tube (100). The drive motor (1001) is located on the outside of the liquid level tube (100). A drive gear is connected to the output shaft of the drive motor (1001). The drive gear meshes with the gear ring (1012) to realize the transmission connection between the drive motor (1001) and the inlet head (101).

6. The groundwater level monitoring device according to claim 5, characterized in that: The water inlet head (101) and the liquid level pipe (100) are surrounded by a protective cover (103). One end of the protective cover (103) has a through hole for the output shaft of the drive motor (1001) to pass through. The drive motor (1001) is located outside the protective cover (103), and the output shaft of the drive motor (1001) passes through the through hole. The gear ring (1012) and the drive gear are located inside the protective cover (103).

7. The groundwater level monitoring device according to claim 6, characterized in that: The liquid level tube (100) is fixed with a support column (110) inside. An installation sleeve (107) is rotatably installed on the periphery of the support column (110). The installation sleeve (107) is formed by two semi-circular sleeves. The two semi-circular sleeves cover the periphery of the support column (110) and are fixed by a fastening ring (1071). The outer periphery of the installation sleeve (107) is provided with an external thread. The end of the water inlet head (101) facing the installation sleeve (107) is provided with an internal thread sleeve (1016). The installation sleeve (107) and the water inlet head (101) are connected by the external thread and the internal thread sleeve (1016). The pressure diaphragm (108) is installed on the end of the support column (110) facing the water inlet head (101).

8. The groundwater level monitoring device according to claim 7, characterized in that: A locking screw (104) is connected to the side wall of the liquid level tube (100). When the water inlet head (101) is screwed to the mounting sleeve (107), the locking screw (104) and the mounting sleeve (107) are tightly engaged to prevent the mounting sleeve (107) from rotating relative to the liquid level tube (100).

9. The groundwater level monitoring device according to claim 1, characterized in that: The inlet head (101) has an installation groove (1011) on its end face away from the liquid inlet pipe. A limiting cone (102) is movably installed in the installation groove (1011). The limiting cone (102) has a drilling thread on its periphery. The limiting cone (102) can move along the central axis of the inlet head (101). One end of the limiting cone (102) in the installation groove (1011) has a limiting post (1023). The bottom of the installation groove (1011) A limiting hole (1013) corresponding to the limiting post (1023) is provided. When the limiting cone (102) moves along the central axis of the water inlet head (101) toward the liquid level pipe (100), the limiting post (1023) is inserted into the limiting hole (1013), so that the limiting cone (102) and the water inlet head (101) are in anti-rotation cooperation. When the water inlet head (101) rotates, it drives the limiting cone (102) to rotate synchronously, so that the limiting cone (102) drills downward into the bottom of the groundwater.

10. A method for monitoring groundwater levels, using the groundwater level monitoring device described in any one of claims 1-9, characterized in that: The groundwater level monitoring method includes the following steps: the probe assembly is placed vertically into the groundwater, the probe assembly monitors the groundwater level by sensing the water pressure value, and when the drive motor (1001) drives the inlet head (101) to rotate, the groundwater flows through the first liquid hole (1014) or the second liquid hole (1015) toward the pressure diaphragm (108) and flushes the pressure diaphragm (108).

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