Device and method for arranging a pressure type electric water level gauge along a turning surface

Abstract

The present invention provides a device and method for arranging a pressure-type electrical water level gauge along a turning surface, comprising: a measuring tube and a pressure-type electrical water level gauge arranged inside the measuring tube; arranging a straight section of the measuring tube in each planar region of the turning surface; arranging a detachable corner of the measuring tube in each corner region of the turning surface; each of the straight sections of the measuring tube and each of the detachable corners of the measuring tube are coaxially arranged, and both ends of the detachable corner of the measuring tube are detachably and hermetically connected to one end of the corresponding straight section of the measuring tube. The advantages are: (1) solving the monitoring technical problems of difficult placement of the water level gauge in a measuring tube with corners and impossible maintenance and replacement of the water level gauge in the later stage; (2) increasing the setting flexibility of the pressure-type electrical water level gauge and reducing the difficulty of selecting points; (3) breaking the convention of not arranging the pressure-type electrical water level gauge on the turning surface and expanding a method for arranging the pressure-type electrical water level gauge along the turning surface.

Description

Technical Field

[0001] The present invention belongs to the technical field of safety monitoring of water conservancy and hydropower projects, and particularly relates to a device and method for arranging a pressure-type electrical water level gauge along a turning surface. Background Art

[0002] The water level monitoring of water conservancy and hydropower projects is an important monitoring item, and the automatic monitoring of the water level needs to be realized. The conventional method is to arrange a long water level gauge measuring straight pipe along a non-turning vertical surface or steep inclined surface, and then put a pressure-type electrical water level gauge from the upper end pipe orifice. This method is particularly common in reservoirs with large water level fluctuations, especially pumped storage power stations, but it is not applicable to turning surfaces. To achieve the strategic goals of carbon peak and carbon neutrality, the scale of renewable energy power generation has increased rapidly, promoting the development of the energy storage industry. Pumped storage power stations will usher in a construction peak, and the reservoir site conditions are more complex and diverse, and turning surfaces are very common. Therefore, there is an urgent need for a method for arranging a pressure-type electrical water level gauge for turning surfaces to realize the water level monitoring of turning surface positions. Summary of the Invention

[0003] Aiming at the defects existing in the prior art, the present invention provides a device and method for arranging a pressure-type electrical water level gauge along a turning surface, which solves the monitoring technical problems of difficult placement of the water level gauge in a measuring pipe with a corner and impossible maintenance and replacement of the water level gauge in the later stage.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The present invention provides a device for arranging a pressure-type electrical water level gauge along a turning surface, including: a measuring pipe and a pressure-type electrical water level gauge arranged inside the measuring pipe;

[0006] The measuring pipe includes a measuring pipe straight section and a detachable measuring pipe corner;

[0007] The measuring pipe straight section is arranged in each plane area of the turning surface; the detachable measuring pipe corner is arranged in each corner area of the turning surface; each of the measuring pipe straight sections and each of the detachable measuring pipe corners are coaxially arranged, and both ends of the detachable measuring pipe corner are detachably and hermetically connected to one end of the corresponding measuring pipe straight section respectively.

[0008] Preferably, each of the detachable measuring pipe corners includes a measuring elbow, a front half joint and a rear half joint;

[0009] The front end of the measuring elbow is detachably and hermetically connected to the rear end of the front half joint; the front end of the front half joint is detachably and hermetically connected to the rear end of the adjacent measuring pipe straight section in front of it;

[0010] The rear end of the measuring elbow is detachably and sealingly connected to the front end of the rear half coupling; the rear end of the rear half coupling is detachably and sealingly connected to the front end of the straight section of the measuring pipe adjacent to it at the rear.

[0011] Preferably, the detachable and sealing connection is: bolt connection is adopted, and sealing rubber is configured at the interface.

[0012] Preferably, the turning angle of the measuring elbow matches the corner shape of the corresponding turning surface, and straight sections for assembling with the front half coupling and the rear half coupling extend from both ends of the measuring elbow.

[0013] Preferably, the measuring pipe is arranged along the turning surface and buried inside the structural surface layer of the turning surface; or, the measuring pipe is arranged along the turning surface and fixed on the surface of the turning surface.

[0014] Preferably, when the measuring pipe is buried inside the structural surface layer of the turning surface, maintenance pits are arranged at positions on the turning surface corresponding to the detachable turning angles of each measuring pipe.

[0015] Preferably, along the length direction of the axis of the measuring pipe, the distance between the maintenance pit and the interface end of the adjacent straight section of the measuring pipe is greater than half of the length of the half coupling;

[0016] The width of the maintenance pit is greater than the maximum width of the half coupling;

[0017] The depth of the maintenance pit is lower than the lower surface of the half coupling.

[0018] Preferably, the measuring pipe passes through the cable connected to the pressure type electric water level gauge;

[0019] A pipe orifice protection device is arranged at the top end of the measuring pipe.

[0020] The present invention also provides a method for arranging a device of a pressure type electric water level gauge along a turning surface. The pressure type electric water level gauge is placed by the following method:

[0021] Connect the calibrated pressure type electric water level gauge with a steel wire rope, bind the cable to the steel wire rope, and then put the pressure type electric water level gauge into water to soak until the permeable stone is saturated for standby;

[0022] Dismantle the half coupling at the detachable turning angle of the measuring pipe, open the half coupling, open the pipe orifice protection device of the measuring pipe and the pipe cover at the top end of the pipe orifice protection device of the measuring pipe; for the scenario where maintenance pits are arranged, only take out the upper half of the half coupling, and the lower half remains at the bottom of the maintenance pit at the connection part;

[0023] Lower the pressure-type electrical water level gauge from the upper port of the straight section of the measuring pipe at the bottommost section to the monitoring position and fix it firmly with steel wire.

[0024] From bottom to top, pass the cable of the pressure-type electrical water level gauge tied to the steel wire rope through the straight section of the measuring pipe and the detachable corner of the measuring pipe in sequence, and finally pass it out from the top pipe orifice of the measuring pipe.

[0025] After detecting that the pressure-type electrical water level gauge is working normally, reinstall the half-coupling and the sealing rubber to the original connection part of the detachable corner, adjust the position of the measuring elbow pipe, and tighten the bolts of the half-coupling.

[0026] After reinspecting that the pressure-type electrical water level gauge is working normally, cover the top pipe cover of the measuring pipe and fix the cable at the pipe orifice at the same time. Extend the cable of the water level gauge to the designated position designed or the monitoring station, and lock the protection device of the measuring pipe orifice.

[0027] Preferably, it also includes a replacement method for the pressure-type electrical water level gauge, which includes the following steps:

[0028] Wait until the water level drops below the elevation of the lowest corner of the measuring pipe and the stabilization time is sufficient to replace the pressure-type electrical water level gauge.

[0029] Connect the newly calibrated pressure-type electrical water level gauge to the steel wire rope and tie the cable to the steel wire rope. Then put the new pressure-type electrical water level gauge into the water to soak the permeable stone until it is saturated for use.

[0030] Open the protection device of the measuring pipe orifice, disconnect the cable joint of the old pressure-type electrical water level gauge to be replaced, open the top pipe cover of the measuring pipe, and loosen the cable at the pipe orifice.

[0031] Remove the bolts of the half-coupling of the detachable corner of the measuring pipe at the corner of the measuring pipe and open the half-coupling; for the measuring pipe provided with a maintenance pit, only take out the upper half of the half-coupling, and leave the lower half at the bottom of the maintenance pit at the connection part.

[0032] At the upper port of the straight section of the bottommost section of the measuring pipe, release the fixed steel wire, and draw out the old pressure-type electrical water level gauge to be replaced and its connected steel wire and cable from the measuring pipe.

[0033] Lower the new pressure-type electrical water level gauge from the upper port of the straight section of the bottommost section of the measuring pipe to the monitoring position and fix it firmly with steel wire.

[0034] From bottom to top, pass the monitoring cable of the new pressure-type electrical water level gauge tied to the steel wire rope through the straight section of the measuring pipe and the detachable corner of the measuring pipe in sequence, and finally pass it out from the top pipe orifice of the measuring pipe.

[0035] After the new pressure type electrical water level gauge is detected to work properly, reinstall the clamp coupling and the sealing rubber to the original detachable corner connection part, adjust the position of the measuring elbow pipe, and tighten the clamp coupling bolts.

[0036] After the new pressure type electrical water level gauge is re-inspected to work properly, tighten the pipe cap at the top of the measuring pipe and fix the cable at the pipe orifice at the same time. Connect the cable of the new pressure type electrical water level gauge to the monitoring signal transmission cable at the original joint, and lock the protection device of the measuring pipe orifice.

[0037] The device and method for arranging the pressure type electrical water level gauge along the turning surface provided by the present invention have the following advantages:

[0038] (1) Solve the monitoring technical problems that it is difficult to place the water level gauge in the measuring pipe with a corner and it is impossible to repair and replace the water level gauge in the later stage;

[0039] (2) Increase the setting flexibility of the pressure type electrical water level gauge and reduce the difficulty of selecting the point position;

[0040] (3) Break the convention of not arranging the pressure type electrical water level gauge on the turning surface and expand a method for arranging the pressure type electrical water level gauge along the turning surface. Description of the Drawings

[0041] Figure 1 It is the structural diagram of the device for arranging the pressure type electrical water level gauge along the turning surface provided by Embodiment 1 of the present invention;

[0042] Figure 2 It is Figure 1 The partial enlarged view of the corner area;

[0043] Figure 3 It is the structural diagram of the device for arranging the pressure type electrical water level gauge along the turning surface provided by Embodiment 2 of the present invention;

[0044] Figure 4 It is Figure 3 The partial enlarged view of the corner area.

[0045] In the figure, 1 - pressure type electrical water level gauge; 2 - monitoring cable; 3 - clamp coupling; 4 - measuring elbow pipe; 5 - measuring straight pipe; 6 - pipe orifice protection device; 7 - structural surface layer; 8 - maintenance pit. Detailed Embodiments

[0046] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0047] The device and method for arranging a pressure - type electric water - level gauge along a turning surface provided by the present invention, especially the device and method for automatic water - level monitoring in a pumped - storage power station. By setting a special connection structure at the turning angle of the water - level gauge measuring pipe and arranging a maintenance pit at the special connection structure of the embedded measuring pipe, the monitoring technical problems of difficult placement of the water - level gauge in the measuring pipe with a turning angle and impossible maintenance and replacement of the water - level gauge in the later stage are solved, breaking the convention of not arranging a pressure - type electric water - level gauge along the turning surface.

[0048] The device and method for arranging a pressure - type electric water - level gauge along a turning surface provided by the present invention mainly include three parts: the structure of the device for arranging a pressure - type electric water - level gauge along a turning surface, the placement method of the pressure - type electric water - level gauge, and the replacement method of the pressure - type electric water - level gauge.

[0049] The device for arranging a pressure - type electric water - level gauge along a turning surface provided by the present invention, as Figures 1-4 shown, includes: a measuring pipe and a pressure - type electric water - level gauge 1 arranged inside the measuring pipe; the monitoring cable 2 connected to the pressure - type electric water - level gauge 1 passes through the measuring pipe; a pipe - mouth protection device 6 is arranged at the top of the measuring pipe.

[0050] The measuring pipe includes a straight - line segment of the measuring pipe and a detachable turning angle of the measuring pipe; the straight - line segment of the measuring pipe is the straight measuring pipe 5 in the figure.

[0051] Among them, the straight - line segment of the measuring pipe is arranged in each plane area of the turning surface; the detachable turning angle of the measuring pipe is arranged in each turning - angle area of the turning surface; each straight - line segment of the measuring pipe and each detachable turning angle of the measuring pipe are coaxially arranged, and the two ends of the detachable turning angle of the measuring pipe are respectively detachably and hermetically connected to one end of the corresponding straight - line segment of the measuring pipe.

[0052] As a specific implementation method, each detachable turning angle of the measuring pipe includes a measuring elbow 4, a front half - coupling and a rear half - coupling; in the present invention, the half - coupling is a straight half - coupling, and the half - coupling is represented by 3 in the figure; the front end of the measuring elbow 4 is detachably and hermetically connected to the rear end of the front half - coupling; the front end of the front half - coupling is detachably and hermetically connected to the rear end of the adjacent straight - line segment of the measuring pipe in front of it;

[0053] The front half - coupling, the measuring elbow 4 and the rear half - coupling are connected in sequence; that is: the rear end of the measuring elbow 4 is detachably and hermetically connected to the front end of the rear half - coupling; the rear end of the rear half - coupling is detachably and hermetically connected to the front end of the adjacent straight - line segment of the measuring pipe behind it.

[0054] In the present invention, the detachable and hermetic connection method includes but is not limited to: using bolt connection and configuring sealing rubber at the interface.

[0055] The turning angle of the measuring elbow 4 is matched with the corner shape of the corresponding turning surface, and straight sections for assembling with the front half-coupling and the rear half-coupling extend from both ends of the measuring elbow 4.

[0056] In practical applications, sufficient lengths of straight sections are left at both ends of the measuring elbow 4 for assembling with the half-couplings. The half-couplings and their bolts are made of stainless steel or other anti-corrosion and rust-proof measures, and a sealing rubber is configured at the interface to adapt to the underwater environment and prevent rust.

[0057] In the present invention, the measuring tube has two installation methods:

[0058] As Figure 1 and Figure 2 shown, it is a schematic diagram of one installation method of the measuring tube. In this connection method, the measuring tube is arranged along the turning surface and buried inside the structural surface layer 7 of the turning surface; when the measuring tube is buried inside the structural surface layer 7 of the turning surface, maintenance pits 8 are arranged at positions corresponding to each detachable corner of the measuring tube on the turning surface to facilitate the placement or replacement of the pressure-type electrical water level gauge 1 and its monitoring cable.

[0059] The size of the maintenance pit 8 should be convenient for the disassembly and assembly of the detachable corner, specifically:

[0060] Along the length direction of the axis of the measuring tube, the distance between the maintenance pit 8 and the interface end of the adjacent straight section of the measuring tube is greater than half of the length of the half-coupling; the width of the maintenance pit 8 is greater than the maximum width of the half-coupling; the depth of the maintenance pit 8 is lower than the lower surface of the half-coupling.

[0061] As a specific embodiment: the maintenance pit 8 can adopt the following dimensions:

[0062] Along the length direction of the axis of the measuring tube, the distances from both ends of the maintenance pit 8 to the interface ends of the corresponding straight measuring tubes 5 are not less than half of the length of the half-coupling plus at least 1 cm. The width of the maintenance pit 8 should be greater than the maximum width of the half-coupling, and the margins on both sides are not less than 5 cm, and the total width should not be less than 30 cm. The depth of the maintenance pit 8 should be such that the closest distance from its bottom surface to the lower surface of the installed half-coupling is not less than 2 cm.

[0063] As Figure 3 and Figure 4 shown, it is a schematic diagram of another installation method of the measuring tube. In this connection method, the measuring tube is arranged along the turning surface and fixed on the surface of the turning surface.

[0064] The present invention provides a method for placing a pressure-type electrical water level gauge, including the following steps:

[0065] Before installation, the pressure type electric water level gauge 1 should be inspected and calibrated to ensure that the instrument is in good condition and accurate. Connect the calibrated pressure type electric water level gauge 1 with a stainless steel wire rope, and tie the cable to the wire rope so that the wire rope bears the self-weight of the water level gauge and the cable. Then, immerse the pressure type electric water level gauge 1 in water to soak the permeable stone until it is saturated for use, ensuring that the gas in the permeable stone is discharged so that the water pressure directly acts on the pressure-bearing membrane of the water level gauge;

[0066] After the above preparations are completed, remove the bolts of the half-coupling with a detachable corner at the corner of the measuring pipe, open the half-coupling, and open the protection device 6 at the measuring pipe opening and the pipe cap at the top of the protection device 6 of the measuring pipe opening; for the scenario where a maintenance pit 8 is provided, that is: for Figure 1 For the measuring pipe with a maintenance pit 8 arranged in the first way as shown, only the upper half of the half-coupling can be taken out, and the lower half remains at the bottom of the maintenance pit 8 at the connection part for easy reinstallation;

[0067] Lower the pressure type electric water level gauge 1 from the upper port of the straight section of the bottommost section of the measuring pipe to the monitoring position and fix it firmly with a wire;

[0068] Pull the cable of the pressure type electric water level gauge 1 tied to the wire rope from bottom to top, pass through the straight section of the measuring pipe and the detachable corner of the measuring pipe in turn, and finally pass out from the top pipe opening of the measuring pipe; specifically, a wire threading device or a thin iron wire can be passed through the top pipe opening in advance, tie the water level gauge wire rope and the cable to the wire threading device or the thin iron wire, and then carefully pull it to the top pipe opening;

[0069] After detecting that the pressure type electric water level gauge 1 is working properly, reinstall the half-coupling and the sealing rubber to the original connection part of the detachable corner, adjust the position of the measuring elbow 4, and tighten the bolts of the half-coupling;

[0070] After reinspecting that the pressure type electric water level gauge 1 is working properly, cover the pipe cap at the top of the measuring pipe and fix the cable at the pipe opening at the same time. Extend the cable of the water level gauge to the designated position or the monitoring station as designed, and lock the protection device 6 at the measuring pipe opening. Reinspection can ensure that damage to the instrument or cable affecting water level observation during the installation and threading of the water level gauge can be detected in time, ensuring the successful installation of the water level gauge.

[0071] The present invention also provides a replacement method for a pressure type electric water level gauge, including the following steps:

[0072] Wait until the water level drops below the elevation of the lowest corner of the measuring pipe and the stable time is sufficient to replace the pressure type electric water level gauge to avoid the threat to personal safety caused by the rising water level during the replacement;

[0073] Connect the newly calibrated pressure type electric water level gauge 1 with a wire rope and tie the cable to the wire rope, and then immerse the new pressure type electric water level gauge 1 in water to soak the permeable stone until it is saturated for use;

[0074] Open the measuring pipe orifice protection device 6, disconnect the cable connector of the old pressure type electrical water level gauge 1 to be replaced, open the top cover of the measuring pipe, and loosen the cable at the orifice;

[0075] Remove the bolts of the half-coupling of the detachable corner of the measuring pipe at the corner of the measuring pipe, and open the half-coupling; for the measuring pipe provided with the maintenance pit 8, that is, for Figure 1 the measuring pipe provided with the maintenance pit 8 in the shown manner, only the upper half of the half-coupling can be taken out, and the lower half remains at the bottom of the maintenance pit 8 at the connection part for easy reinstallation;

[0076] At the upper port of the straight section of the measuring pipe at the bottommost section, release the fixed steel wire, and draw out the old pressure type electrical water level gauge 1 to be replaced and its connected steel wire and cable from the measuring pipe;

[0077] Lower the new pressure type electrical water level gauge 1 from the upper port of the straight section of the measuring pipe at the bottommost section to the monitoring position and fix it firmly with a steel wire;

[0078] The monitoring cable of the new pressure type electrical water level gauge 1 tied to the steel wire rope passes through the straight section of the measuring pipe and the detachable corner of the measuring pipe from bottom to top in sequence, and finally passes out from the top orifice of the measuring pipe;

[0079] After detecting that the new pressure type electrical water level gauge 1 works normally, reinstall the half-coupling and the sealing rubber to the original connection part of the detachable corner, adjust the position of the measuring elbow 4, and tighten the half-coupling bolts;

[0080] After reinspecting that the new pressure type electrical water level gauge 1 works normally, cover the top cover of the measuring pipe and fix the cable at the orifice at the same time. Connect the cable of the new pressure type electrical water level gauge 1 to the monitoring signal transmission cable at the original joint, and lock the measuring pipe orifice protection device 6.

[0081] Specifically, it is described in detail with examples:

[0082] For a large pumped storage power station project, a berm is set around the reservoir slope. The conventional method of setting a long water level gauge measuring straight pipe 5 along a non-turning vertical surface or steep inclined surface is not applicable. Non-contact type such as radar water level gauge is also not applicable due to large water level drop and too large horizontal extension distance from the bank slope. This project adopts the method of setting the pressure type electrical water level gauge 1 along the turning surface of the present invention, which solves the engineering requirements for setting an automatic water level gauge. The specific implementation process is as follows:

[0083] First, before pouring the slope - attached concrete according to the designed pile number, initially install (not yet fixed and adjustable) the national standard DN80mm hot - dip galvanized steel measuring straight pipe 5 along the excavated surface of the reservoir slope using pipe clamps and expansion bolts. (Since this project uses the method of embedding within the structural surface layer 7, an inlet for connecting with the reservoir water needs to be reserved at the bottom - most measuring straight pipe 5). At the turning corners on both sides of the slope roadway, successively connect one front - end half - coupling, one section of measuring elbow 4, and one rear - end half - coupling to the measuring straight pipes 5 on both sides of the corresponding turning corner. The turning angle of the measuring elbow 4 matches the turning angle of the turning corner at the corresponding position. Specifically, on - site, use a pipe bender to fabricate the measuring elbow 4. The straight sections left at both ends of the measuring elbow 4 are assembled with the half - couplings. The half - couplings and their bolts are made of stainless steel, and a sealing rubber is configured at the interface to adapt to the underwater environment, prevent rust, and facilitate maintenance, disassembly, and assembly. After the initial assembly of the entire measuring pipe is correct, tighten the expansion bolts of the pipe clamps of the measuring straight pipe 5 to firmly fix the measuring straight pipe 5.

[0084] Before pouring the slope - attached concrete, formwork is erected at the maintenance pit 8 so that the length of the maintenance pit 8 along the axis of the measuring pipe, at both ends, is not less than half of the length of the half - coupling plus at least 1 cm from the interface end of the corresponding measuring straight pipe 5. The width of the maintenance pit 8 is greater than the maximum width of the half - coupling, and the margins on both sides are not less than 5 cm, and the total width is not less than 30 cm. The depth of the maintenance pit 8 is such that the closest distance from its bottom surface to the lower surface of the installed half - coupling is not less than 2 cm. Where the depth is insufficient, chiseling is carried out. During the concrete pouring process, keep the detachable corner in the connected state to prevent concrete from entering the measuring pipe. The formwork of the pit is finally removed after the slope - attached construction is completed, and a pipe - mouth protection device 6 is built at the top pipe - mouth of the measuring pipe.

[0085] Before the reservoir is filled with water, place the pressure - type electric - measuring water - level gauge 1:

[0086] The pressure - type electric - measuring water - level gauge 1 comes with a supporting special monitoring cable 2. The monitoring cable 2 is laid to the pipe - mouth protection device 6 at the reservoir top and left with a certain surplus length. Before placing, conduct calibration and inspection on the pressure - type electric - measuring water - level gauge 1 to ensure that the instrument is in good condition and accurate. After calibration and inspection, connect it with a stainless - steel wire rope and bind the cable to the wire rope so that the wire rope bears the self - weight of the water - level gauge and the cable. Then, immerse the water - level gauge in degassed water to soak the permeable stone and expel the gas in the permeable stone.

[0087] After the above preparatory work is completed, remove the bolts of the half - coupling 3 at the detachable corner of the measuring pipe at the roadway, open the half - coupling, open the pipe - mouth protection device 6 and the top pipe - cover of the measuring pipe; take out the upper half of the half - coupling, and leave the lower half at the bottom of the maintenance pit 8 at the connection part;

[0088] Lower the pressure type electric water level gauge 1 from the upper port of the measurement straight pipe 5 at the bottommost section to the monitoring position and firmly fix the steel wire. Pass a wire threading device through the top pipe orifice, tie the water level gauge steel wire rope and the cable head to the wire threading device, carefully retrieve the wire threading device, so that the water level gauge steel wire rope and the cable pass through the measurement elbow 4 with a detachable corner and the measurement straight pipe 5 in the straight section in sequence, and finally pass out from the top pipe orifice, and then remove the wire threading device.

[0089] After detecting that the water level gauge is working properly, install the haff (straight) joint with a detachable corner, the measurement elbow 4 and the sealing rubber, adjust the position, and tighten the haff joint bolts.

[0090] After reinspecting that the water level gauge is working properly, tightly cover the top pipe cover of the measurement pipe and fix the steel wire and the cable at the pipe orifice at the same time. Extend and lay the water level gauge cable to the designated position designed or the monitoring station, and lock the pipe orifice protection device 6.

[0091] To replace the water level gauge, first pull out the old water level gauge and the cable from the measurement pipe, and the remaining process is basically the same as the placement.

[0092] The beneficial effects of the present invention are as follows:

[0093] (1) Solve the monitoring technical problems that it is difficult to place the water level gauge in the measurement pipe with a corner and it is impossible to repair and replace the water level gauge in the later stage;

[0094] (2) Increase the setting flexibility of the pressure type electric water level gauge and reduce the difficulty of selecting points;

[0095] (3) Break the convention of not setting the pressure type electric water level gauge at the turning surface, and expand a method of setting the pressure type electric water level gauge along the turning surface.

[0096] The above is only used to illustrate the technical idea and characteristics of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The patent protection scope of the present invention cannot be limited only by this embodiment. That is, any equivalent changes or modifications made according to the spirit disclosed in the present invention patent are still regarded as the patent protection scope of the present invention.

Claims

1. A device for arranging a pressure type electric water level gauge along a turning surface, characterized in that, Including: A measuring tube and a pressure-type electric water level gauge disposed inside the measuring tube; The measuring tube includes a straight section of the measuring tube and a detachable corner of the measuring tube; The straight section of the measuring tube is disposed in each planar region of the turning surface; the detachable corner of the measuring tube is disposed in each corner region of the turning surface; each of the straight sections of the measuring tube and each of the detachable corners of the measuring tube are coaxially disposed, and both ends of the detachable corner of the measuring tube are detachably and hermetically connected to one end of the corresponding straight section of the measuring tube respectively; Each of the detachable corners of the measuring tube includes a measuring elbow, a front half coupling and a rear half coupling; The front end of the measuring elbow is detachably and hermetically connected to the rear end of the front half coupling; the front end of the front half coupling is detachably and hermetically connected to the rear end of the adjacent straight section of the measuring tube in front of it; The rear end of the measuring elbow is detachably and hermetically connected to the front end of the rear half coupling; the rear end of the rear half coupling is detachably and hermetically connected to the front end of the adjacent straight section of the measuring tube behind it; The measuring tube is disposed along the turning surface and buried inside the structural surface layer of the turning surface; or, the measuring tube is disposed along the turning surface and fixed to the surface of the turning surface; When the measuring tube is buried inside the structural surface layer of the turning surface, a maintenance pit is provided at a position corresponding to each detachable corner of the measuring tube on the turning surface; The measuring tube passes through a cable connected to the pressure-type electric water level gauge; a pipe orifice protection device is provided at the top end of the measuring tube.

2. The device for arranging a pressure type electric water level gauge along a turning surface according to claim 1, characterized in that, The detachable and hermetic connection is: bolt connection is adopted, and a sealing rubber is configured at the interface.

3. The device for arranging a pressure-type electric water level gauge along a turning surface according to claim 1, characterized in that, The turning angle of the measuring elbow matches the corner shape of the turning surface where it is located, and straight sections for assembling with the front half coupling and the rear half coupling extend from both ends of the measuring elbow.

4. The device for arranging a pressure type electric water level gauge along a turning surface according to claim 1, wherein Along the length direction of the axis of the measuring tube, the distance between the maintenance pit and the interface end of the adjacent straight section of the measuring tube is greater than half of the length of the half coupling; The width of the maintenance pit is greater than the maximum width of the half coupling; The depth of the maintenance pit is lower than the lower surface of the half coupling.

5. A method for the device of arranging a pressure type electric water level gauge along a turning surface according to any one of claims 1-4, characterized in that, The pressure-type electric water level gauge is placed by the following method: Connect the calibrated pressure-type electric water level gauge with a steel wire rope, bind the cable with the steel wire rope, and then soak the pressure-type electric water level gauge in water until the permeable stone is saturated for standby; Dismantle the half couplings of the detachable corners of the measuring tube, open the half couplings, open the pipe orifice protection device and the pipe cover at the top end of the pipe orifice protection device of the measuring tube; for the scenario where a maintenance pit is provided, only take out the upper half of the half coupling, and the lower half remains at the bottom of the maintenance pit at the connection part; Lower the pressure-type electric water level gauge from the upper port of the straight section of the measuring tube at the bottommost section to the monitoring position and fix it firmly with a steel wire; The cable of the pressure-type electric water level gauge bound with the steel wire rope passes through the straight section of the measuring tube and the detachable corner of the measuring tube from bottom to top in sequence, and finally passes out from the top orifice of the measuring tube; After detecting that the pressure-type electric water level gauge works normally, reinstall the half coupling and the sealing rubber to the connection part of the original detachable corner, adjust the position of the measuring elbow, and tighten the bolts of the half coupling; After the retest pressure type electrical water level gauge works normally, tightly cover the pipe cap at the top of the measuring pipe and fix the cable at the pipe orifice at the same time. Extend the cable of the water level gauge to the designated position or the monitoring station as designed, and lock the protection device of the measuring pipe orifice.

6. The method for the device of arranging a pressure-type electric water level gauge along a turning surface according to claim 5, characterized in that, It also includes a replacement method for the pressure type electrical water level gauge, which includes the following steps: Wait until the water level drops below the elevation of the lowest measuring pipe bend, and the stabilization time is sufficient to replace the pressure type electrical water level gauge; Connect the newly calibrated pressure type electrical water level gauge to it with a steel wire rope and tie the cable to the steel wire rope. Then soak the new pressure type electrical water level gauge in water until the pervious stone is saturated and ready for use; Open the protection device of the measuring pipe orifice, disconnect the cable joint of the old pressure type electrical water level gauge to be replaced, open the pipe cap at the top of the measuring pipe, and loosen the cable at the pipe orifice; Remove the bolts of the half-coupling of the detachable bend of the measuring pipe at the bend of the measuring pipe and open the half-coupling; for the measuring pipe provided with a maintenance pit, only take out the upper half of the half-coupling, and leave the lower half at the bottom of the maintenance pit at the connection part; At the upper port of the straight section of the bottommost section of the measuring pipe, release the fixed steel wire, and draw out the old pressure type electrical water level gauge to be replaced and its connected steel wire and cable from the measuring pipe; Lower the new pressure type electrical water level gauge from the upper port of the straight section of the bottommost section of the measuring pipe to the monitoring position and fix it firmly with a steel wire; The monitoring cable of the new pressure type electrical water level gauge tied to the steel wire rope passes through the straight section of the measuring pipe and the detachable bend of the measuring pipe from bottom to top, and finally passes out from the top orifice of the measuring pipe; After detecting that the new pressure type electrical water level gauge works normally, reinstall the half-coupling and the sealing rubber to the original connection part of the detachable bend, adjust the position of the measuring elbow, and tighten the bolts of the half-coupling; After retesting that the new pressure type electrical water level gauge works normally, tightly cover the pipe cap at the top of the measuring pipe and fix the cable at the pipe orifice at the same time. Connect the cable of the new pressure type electrical water level gauge to the monitoring signal transmission cable at the original joint, and lock the protection device of the measuring pipe orifice.

Images