A groundwater measuring device

Abstract

The invention discloses a groundwater measuring device, comprising a measuring rope and a probe, wherein a plurality of metal nodes are arranged on the measuring rope at equal intervals, and an orifice sleeve for fixing the measuring rope, wherein the orifice sleeve comprises a platform and a collar, wherein the platform is in the shape of a circular ring, and the collar is in the shape of a cylindrical tube, wherein the platform is arranged on the upper end surface of the collar, and a measuring rope fixing structure is arranged in the platform collar, wherein a slideway with an opening at one end and a closing at the other end is arranged on the measuring rope fixing structure, wherein the width of the slideway is greater than the diameter of the measuring rope, and protruding buckles are arranged on both sides of the slideway. The device has the advantages that the length of the measuring rope can be quickly calibrated by the number of metal nodes, thereby eliminating the field measurement work of the rope length; the disc-shaped metal node cooperates with the slideway to fix the measuring rope in the vertical direction, which is convenient and effective; the measuring rope is arranged vertically in the hydrological pipe and does not contact the pipe mouth of the hydrological pipe, and will not be damaged due to bending or wear; protruding buckles are arranged on both sides of the slideway, and the metal nodes are limited in the horizontal direction, thereby preventing the measuring rope from slipping out of the slideway and falling off.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater monitoring equipment, and in particular to a groundwater measuring device. Background Art

[0002] Changes in groundwater levels are one of the most active factors that cause karst collapse. The seepage caused by the rise and fall of groundwater levels can carry away soil particles and leak into hidden karst pores. It can also cause negative pressure to cause the overlying soil to collapse downward and cause karst collapse. Many data show that groundwater levels often have abnormal reactions before karst collapse occurs. Therefore, monitoring of groundwater levels is crucial for the prediction and prevention of karst collapse. With the popularization of fully automatic groundwater monitoring systems, the accuracy of groundwater monitoring probes is getting higher and higher, even reaching 0.1mm. At the same time, high-precision probes also urgently need high-standard measuring devices.

[0003] like Figure 1 As shown in the figure, the working principle of the groundwater monitoring probe is to place the probe at a certain depth underwater, measure the water pressure P, calculate the groundwater depth D and the groundwater elevation Y through the pressure P, and the calculation formula is as follows: D = P / 100-10.336; Y = D + G-L + H. In the formula, D is the groundwater depth, Y is the groundwater elevation, P is the water pressure measured by the probe, G is the surface elevation, L is the length of the measuring rope, and H is the height of the hydrological hole from the surface. The surface elevation G, the measuring rope length L and the hole height H need to be measured on site, and they are basic parameters and should remain unchanged.

[0004] However, the actual length of the measuring rope needs to be determined according to the specific conditions of the water level, hole depth, water level rise and fall at the measurement site. It can be as short as a few meters or as long as dozens of meters. It is very difficult to measure the measuring rope in the field, and there are large errors. In terms of the fixing method of the measuring rope, the traditional method is often to use bundling, tape winding, etc. Since the probe has a certain weight, when the hole is deep and the measuring rope is long, the overall weight of the probe and the measuring rope is large, and the bundling method often fails. The measuring rope will slide down to varying degrees, seriously affecting the quality of groundwater monitoring. On the other hand, the orifice of the hydrological hole is sharp, and the bending of the measuring rope is easy to damage the measuring rope, resulting in a shortened service life of the instrument. Summary of the invention

[0005] The purpose of the present invention is to provide a groundwater measuring device in response to the existing technical status. The length of the measuring rope can be quickly calibrated by the number of metal nodes, thereby eliminating the field measurement of the rope length; the disc-shaped metal nodes cooperate with the slide to fix the measuring rope in the vertical direction, which is convenient and effective; the measuring rope is vertically arranged in the hydrological pipe and does not contact the pipe mouth of the hydrological pipe, and will not be damaged due to bending or wear; raised buckles are provided on both sides of the slide, which limit the metal nodes in the horizontal direction, thereby preventing the measuring rope from slipping out of the slide and falling.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A groundwater measuring device comprises a measuring rope and a probe, wherein the probe is mounted on the measuring rope, and a plurality of metal nodes are arranged at equal intervals on the measuring rope, and the metal nodes are in the shape of a disk;

[0008] It also includes an orifice sleeve for fixing the measuring rope, the orifice sleeve includes a platform and a collar, the platform is in a circular ring shape, the collar is in a cylindrical tube shape, the platform is arranged on the upper end surface of the collar, the outer diameter of the platform is larger than the outer diameter of the hydrological pipe, the outer diameter of the collar is smaller than the inner diameter of the hydrological pipe, after installation, the collar is inserted into the hydrological pipe, and the platform is placed on the end surface of the hydrological pipe;

[0009] A measuring rope fixing structure is provided in the platform ring, and a slideway with an open end and a closed end is provided on the measuring rope fixing structure. The width of the slideway is greater than the diameter of the measuring rope. Raised buckles are provided on both sides of the slideway, and the diameter of the metal node is greater than the distance between the two raised buckles. After installation, the measuring rope is located in the slideway, the metal node is located on the slideway, and the measuring rope is vertically arranged in the hydrological pipe and does not contact the pipe mouth of the hydrological pipe.

[0010] Furthermore, the raised buckle is an inverted L-shape, and the thickness of the metal node is not greater than the height of the raised buckle crossbar.

[0011] Furthermore, elastic limiting members are provided on both sides of the slideway.

[0012] Furthermore, the slideway is located at the center of the platform ring.

[0013] Furthermore, a first measuring rope inlet and outlet is radially provided on the upper edge of the annular surface of the platform, the width of the first measuring rope inlet and outlet is greater than the diameter of the measuring rope, a second measuring rope inlet and outlet is provided on the side wall of the ring, and the two side walls of the second measuring rope inlet and outlet are coplanar with the two side walls of the first measuring rope inlet and outlet.

[0014] Furthermore, the platform, the ring and the measuring rope fixing structure are formed in one piece.

[0015] Furthermore, the distance between adjacent metal nodes is 1 m, and the probe is installed at the lowest metal node on the measuring rope.

[0016] The beneficial effects of the present invention are:

[0017] 1. Several metal nodes are set at equal intervals on the measuring rope. The length of the measuring rope can be quickly calibrated by the number of metal nodes, eliminating the need for field measurement of the rope length;

[0018] 2. At the opening of the hydrological pipe, the disc-shaped metal node and the slideway are used to fix the measuring rope in the vertical direction, which is convenient and effective and can prevent the measuring rope from sliding down;

[0019] 3. After installation, the collar is inserted into the hydrological pipe, the platform is placed on the end face of the hydrological pipe, the measuring rope is located in the slideway, and the metal node is located on the slideway, so that the measuring rope is vertically set in the hydrological hole, and the measuring rope will not be damaged due to bending or wear;

[0020] 4. There are raised buckles on both sides of the slideway to limit the metal nodes in the horizontal direction, which can prevent the measuring rope from slipping out of the slideway and falling due to factors such as wind blowing and deformation and tilt of the hydrological hole;

[0021] 5. The slideway is located at the center of the platform ring, so that the measuring rope is located at the center of the hydrological pipe, which can reduce the friction between the probe and the inner wall of the hydrological pipe and maintain the use environment of the monitoring instrument;

[0022] 6. Elastic limiters are also provided on both sides of the slideway. The two elastic limiters cooperate with the two protruding buckles to limit the position of the metal node on the slideway, so that the position of the measuring rope in the hydrological pipe remains unchanged;

[0023] 7. The first measuring rope inlet and outlet and the second measuring rope inlet and outlet are respectively provided on the platform and the sleeve ring, and the two constitute an integral channel for the measuring rope to pass through the inside and outside of the platform ring, so the orifice sleeve can be placed at any stage during the measurement operation;

[0024] 8. The platform, the ring and the measuring rope fixing structure are formed in one piece, with low production cost and wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 It is a schematic diagram of the measuring principle of the groundwater measuring device of the present invention;

[0026] Attached Figure 2 A three-dimensional diagram of the measuring rope of the present invention;

[0027] Attached Figure 3 It is a front view of the measuring rope of the present invention;

[0028] Attached Figure 4 A three-dimensional diagram of the orifice sleeve of the present invention;

[0029] Attached Figure 5 It is a front view of the orifice sleeve of the present invention;

[0030] Attached Figure 6 A top view of the orifice sleeve of the present invention;

[0031] Attached Figure 7 is a side view of the orifice sleeve of the present invention;

[0032] Attached Figure 8 It is a schematic diagram of the assembly structure of the measuring rope and the hole sleeve of the present invention.

[0033] Marking instructions: 1. Platform, 2. Measuring rope fixing structure, 2-1. Raised buckle, 2-2. Slide, 2-3. Elastic limiter, 3. Ring, 4. First measuring rope inlet and outlet, 5. Second measuring rope inlet and outlet, 6. Measuring rope, 7. Metal node, 8. Ground plane, 9. Groundwater surface, 10. Probe, 11. Hydrological pipe. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] See also Figure 1 As shown, it is a schematic diagram of the measuring principle of the groundwater measuring device. The groundwater measuring device includes a measuring rope 6 and a probe 10. The probe 10 is installed on the measuring rope 6. After the hydrological hole is drilled, a hydrological pipe 11 is arranged below. The hydrological pipe 11 is higher than the ground plane 8 by a certain distance. During installation, according to the data such as the depth of the hydrological hole, the length of the hydrological pipe 11 and the groundwater level in previous years reported by the drilling report, a suitable length of the measuring rope 6 is selected, and the probe 10 is lowered through the measuring rope 6 to a certain depth below the groundwater surface 9.

[0036] Embodiment 1:

[0037] See also Figure 2-3 As shown, a plurality of metal nodes 7 are arranged at equal intervals on the measuring rope 6, and the metal nodes 7 are disc-shaped. The length of the measuring rope 6 can be quickly calibrated by the number of metal nodes 7, eliminating the need for field measurement of the rope length. Preferably, the spacing between adjacent metal nodes 7 is 1m, and the probe 10 is installed at the lowest metal node 7 on the measuring rope 6, which is convenient for calculation and measurement.

[0038] See also Figure 4-7 As shown, it also includes a hole sleeve for fixing the measuring rope 6, the hole sleeve includes a platform 1 and a ring 3, the platform 1 is annular, the ring 3 is cylindrical, the platform 1 is arranged on the upper end surface of the ring 3, the outer diameter of the platform 1 is larger than the outer diameter of the hydrological tube 11, and the outer diameter of the ring 3 is smaller than the inner diameter of the hydrological tube 11.

[0039] A measuring rope fixing structure 2 is provided inside the ring of the platform 1, and a slide 2-2 with an open end and a closed end is provided on the measuring rope fixing structure 2. The width of the slide 2-2 is greater than the diameter of the measuring rope 6. Protruding buckles 2-1 are provided on both sides of the slide 2-2, and the diameter of the metal node 7 is greater than the distance between the two protruding buckles 2-1.

[0040] After installation, the collar 3 is inserted into the hydrological tube 11, the platform 1 is placed on the end face of the hydrological tube 11, the measuring rope 6 is located in the slide 2-2, and the metal node 7 is located on the slide 2-2. At the mouth of the hydrological tube 11, the disc-shaped metal node 7 cooperates with the slide 2-2 to fix the measuring rope 6 in the vertical direction, which is convenient and effective, and can prevent the measuring rope 6 from sliding down. At the same time, the measuring rope 6 is vertically arranged in the hydrological tube 11 and does not contact the mouth of the hydrological tube 11, and the measuring rope 6 will not be damaged by bending or wear. In addition, raised buckles 2-1 are provided on both sides of the slide 2-2, which limit the metal node 7 in the horizontal direction, and can prevent the measuring rope 6 from sliding out of the slide 2-2 and falling due to factors such as wind blowing and deformation and tilting of the hydrological hole. Preferably, the raised buckle 2-1 is an inverted L-shape, and the thickness of the metal node 7 is not greater than the height of the cross bar of the raised buckle 2-1, and the raised buckle 2-1 has a better limiting effect on the disc-shaped metal node 7.

[0041] Preferably, elastic limiters 2-3 are further provided on both sides of the slideway 2-2. The two elastic limiters 2-3 cooperate with the two protruding buckles 2-1 to limit the position of the metal node 7 on the slideway 2-2, so that the position of the measuring rope 6 in the hydrological pipe 11 remains unchanged. In actual selection, the elastic limiter 2-3 is a spring sheet, which is arranged on the upper surface of the measuring rope fixing structure 2, and the extension direction of the spring sheet is perpendicular to the platform 1.

[0042] Preferably, the slideway 2-2 is located at the center of the platform 1 ring, so that the measuring rope 6 is located at the center of the hydrological tube 11, which can reduce the friction between the probe 10 and the inner wall of the hydrological tube 11 and maintain the use environment of the monitoring instrument.

[0043] Preferably, the platform 1, the ring 3 and the measuring rope fixing structure 2 are integrally formed, which has low production cost and wide applicability.

[0044] Specifically, when using the groundwater measuring device for water level monitoring, after determining the length of the measuring rope 6, calibrate the required length of the measuring rope 6 according to the number of metal nodes 7, install the probe 10 at the lowest metal node 7 on the measuring rope 6, and when the length of the measuring rope 6 is not an integer, adjust the installation point of the probe 10. Place the orifice sleeve on the mouth of the hydrological pipe 11, insert the probe 10 and the measuring rope 6 from the ring of the platform 1, and when the measuring rope 6 is below the uppermost metal node 7, make the metal node 7 higher than the protruding buckle 2-1, and pass the measuring rope 6 from the open end of the slideway 2-2 to the closed end of the slideway 2-2 along the slideway 2-2, then lower the measuring rope 6 so that the metal node 7 contacts the measuring rope fixing structure 2, and push the metal node 7 back so that it is confined between the two elastic limit members 2-3 and the two protruding buckles 2-1, and complete the installation. When disassembling, just do the reverse operation.

[0045] Embodiment 2:

[0046] On the basis of Example 1, a first measuring rope inlet and outlet 4 is radially provided on the annular surface of the platform 1, the width of the first measuring rope inlet and outlet 4 is greater than the diameter of the measuring rope 6, and a second measuring rope inlet and outlet 5 is provided on the side wall of the ring 3, and the two side walls of the second measuring rope inlet and outlet 5 are coplanar with the two side walls of the first measuring rope inlet and outlet 4.

[0047] In the above technical solution, the first measuring rope inlet and outlet 4 and the second measuring rope inlet and outlet 5 are respectively provided on the platform 1 and the ring 3, and the two constitute an integral channel for the measuring rope 6 to pass through the ring inside and outside the platform 1, so the orifice sleeve can be placed at any stage in the measurement operation process. In other words, we can place the orifice sleeve first and then lower the measuring rope 6, or lower the measuring rope 6 first and place the orifice sleeve at any time later.

[0048] Of course, the above are only preferred embodiments of the present invention, and are not intended to limit the scope of use of the present invention. Therefore, any equivalent changes made to the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A groundwater measuring device, comprising a measuring rope and a probe, wherein the probe is mounted on the measuring rope, and characterized in that: The measuring rope is provided with a plurality of metal nodes at equal intervals, and the metal nodes are in the shape of disks; It also includes an orifice sleeve for fixing the measuring rope, the orifice sleeve includes a platform and a collar, the platform is in a circular ring shape, the collar is in a cylindrical tube shape, the platform is arranged on the upper end surface of the collar, the outer diameter of the platform is larger than the outer diameter of the hydrological pipe, the outer diameter of the collar is smaller than the inner diameter of the hydrological pipe, after installation, the collar is inserted into the hydrological pipe, and the platform is placed on the end surface of the hydrological pipe; A measuring rope fixing structure is provided in the platform ring, and a slideway with an open end and a closed end is provided on the measuring rope fixing structure. The width of the slideway is greater than the diameter of the measuring rope. Raised buckles are provided on both sides of the slideway. The diameter of the metal node is greater than the distance between the two raised buckles. After installation, the measuring rope is located in the slideway, the metal node is located on the slideway, and the measuring rope is vertically arranged in the hydrological pipe and does not contact the pipe opening of the hydrological pipe. The platform, the ring and the measuring rope fixing structure are integrally formed; The distance between adjacent metal nodes is 1m, and the probe is installed at the lowest metal node on the measuring rope.

2. A groundwater measuring device according to claim 1, characterized in that: The protruding buckle is in an inverted L-shape, and the thickness of the metal node is not greater than the height of the protruding buckle crossbar.

3. A groundwater measuring device according to claim 2, characterized in that: Elastic limiting parts are also arranged on both sides of the slideway.

4. A groundwater measuring device according to claim 3, characterized in that: The slideway is located at the center of the platform ring.

5. A groundwater measuring device according to claim 1, characterized in that: A first measuring rope inlet and outlet is radially arranged on the upper edge of the annular surface of the platform, the width of the first measuring rope inlet and outlet is greater than the diameter of the measuring rope, a second measuring rope inlet and outlet is arranged on the side wall of the ring, and the two side walls of the second measuring rope inlet and outlet are coplanar with the two side walls of the first measuring rope inlet and outlet.

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