Pressure measuring tube

Abstract

The utility model discloses a pressure measuring pipe in the technical field of underground water monitoring, which comprises an outer layer pipe, an outer pipe barrel, an outer sealing plate, an inner layer pipe, an inner layer pipe, an inner layer pipe, an inner layer pipe, an inner layer pipe and an outer layer pipe, and is characterized in that the outer pipe barrel is provided with an outer pipe section, an outer penetration section and an outer sinking section; the inner-layer pipe is movably sleeved with the outer-layer pipe and comprises an inner pipe barrel and an inner sealing plate, the inner pipe barrel is provided with an inner pipe section, an inner penetrating section and an inner sinking section, and the inner sealing plate is arranged at the bottom of the inner pipe barrel; the filtering layer covers the periphery of the outer penetrating section; the inverted filter material is filled among the outer penetration section, the outer sinking section and the pressure measuring well; the water stop material is filled between the outer pipe section and the pressure measuring well; the liquid level sensing unit is arranged on the side wall of the inner pipe section in a penetrating manner; the signal processing unit is arranged outside the pressure measuring well and is electrically connected with the liquid level sensing unit; the warning unit is electrically connected with the signal processing unit; the device can automatically measure whether the height of a water head reaches the highest water level or not, prompts immediately after the height reaches the highest water level, saves time and labor, is high in measurement efficiency and low in labor cost, is convenient to overhaul and maintain, and is beneficial to long-term actual use.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy project monitoring, in particular to a pressure measuring tube. Background Art

[0002] Seepage safety plays a very important role in the overall safety of water conservancy and hydropower projects. After the earth dam is built and water is stored, seepage will inevitably occur in the dam body due to the effect of water head. Water seeps from upstream to downstream in the dam body, forming a gradually descending seepage water surface, called the infiltration surface. The infiltration surface is only displayed as a curve on the cross section of the earth-rock dam, usually called the infiltration line. The height and change of the earth dam infiltration line are closely related to the safety and stability of the earth dam. In the design of earth dams, it is necessary to calculate and determine the position of the infiltration line according to the cross-sectional dimensions of the earth-rock dam, the upstream and downstream water levels, and the physical and mechanical indicators of the soil, and then perform dam slope stability analysis and calculation. If the actual infiltration line is higher than the designed infiltration line, it means that the stability of the dam slope is reduced, and it may even cause landslide instability accidents. To this end, it is necessary to observe and grasp the position and change of the dam body infiltration line to determine whether the seepage of the earth-rock dam is normal during operation and whether the dam slope is safe and stable.

[0003] The piezometer is a commonly used seepage pressure monitoring device in seepage monitoring. The height of the water column in the tube indicates the seepage pressure in the area. It is often used to monitor groundwater level, dam infiltration line, dam foundation uplift pressure, seepage around dams, etc. Generally speaking, the water level in the piezometer is mainly affected by changes in the water level of the upstream reservoir and rainfall. Therefore, when the risk of flood disasters is high during the rainy season, the frequency of water level monitoring in the piezometer will be increased accordingly to avoid the situation where the dam seepage disaster cannot be warned in time.

[0004] However, in the current safety monitoring of seepage in pressure gauge tubes, manual methods are usually used to monitor the water head height in the pressure gauge tube, which is time-consuming and labor-intensive, extremely inefficient and has high labor costs. In addition, it is impossible to immediately warn when the water level in the pipe exceeds the designed maximum water level line, and the warning is not timely. Utility Model Content

[0005] The utility model aims to provide a pressure measuring tube, which solves the technical problems in the prior art that the water head height measurement in the pressure measuring tube is time-consuming and labor-intensive, extremely inefficient, and has high labor costs and is not timely.

[0006] The utility model discloses a pressure measuring tube, comprising:

[0007] The outer layer pipe is set in the pressure measuring well, including

[0008] The outer tube comprises an outer tube section, an outer transparent section and an outer sinking section connected from top to bottom, and a plurality of first through holes are opened on the outer periphery of the outer transparent section.

[0009] An outer sealing plate, arranged at the bottom of the outer tube;

[0010] The inner tube is movably mounted inside the outer tube, comprising

[0011] The inner tube comprises an inner tube section, an inner penetration section and an inner sinking section connected from top to bottom, wherein the inner penetration section corresponds to the outer penetration section, and a plurality of second through holes are formed on the outer periphery of the inner penetration section.

[0012] An inner sealing plate, arranged at the bottom of the inner tube;

[0013] A filter layer, covering the outer periphery of the outer transparent section;

[0014] Inverted filter material is filled between the external permeable section, the external sinking section and the pressure measuring well;

[0015] Water-stop material, filled between the outer pipe section and the pressure measuring well;

[0016] A liquid level sensing unit is provided through the side wall of the inner tube section;

[0017] A signal processing unit is disposed outside the pressure measuring well and is electrically connected to the liquid level sensing unit;

[0018] The warning unit is electrically connected to the signal processing unit and is used for alarming.

[0019] The present application can automatically measure whether the water head height in the pressure measuring tube reaches the highest water level line by setting a liquid level sensing unit, a signal processing unit and a warning unit, and remind the operating personnel after reaching it. It saves time and labor, has high measurement efficiency, and reduces labor costs. By setting an inner layer pipe, it is easy to inspect and maintain, which is conducive to long-term practical use.

[0020] On the basis of the above technical solution, the solution of this application can also be improved as follows:

[0021] Preferably, the filter layer comprises non-woven geotextile or wire mesh; this solution has the advantages of good filtering effect and low material cost.

[0022] Preferably, the filter material includes coarse sand; this solution has the advantages of low material cost and convenient filling.

[0023] Preferably, the water-stop material includes clay balls, water-swellable water-stop strips, concrete or cement; this solution has the advantages of low material cost and convenient filling.

[0024] Preferably, the liquid level sensing unit is a duckbill float switch; this solution has the advantages of sensitive detection, long service life and convenient installation and arrangement.

[0025] Preferably, the signal processing unit is a relay; by adopting this solution, the control circuit and the controlled circuit can be separated, thereby improving the stability and safety of the system, and having high reliability, being less susceptible to external interference, and being able to work stably under various working conditions.

[0026] Preferably, the warning unit is a warning light and / or a buzzer; by adopting this solution, the operating personnel can be reminded in time quickly and efficiently, and the warning effect is good.

[0027] Preferably, the liquid level sensing unit is electrically connected to the signal processing unit via a transmission cable; this solution has the advantage of stable signal transmission and can also power the liquid level sensing unit, thus achieving good practical application effects.

[0028] Through the above technical solution, the utility model achieves the following beneficial effects:

[0029] The present application can automatically measure whether the water head height in the pressure measuring tube reaches the highest water level line by setting a liquid level sensing unit, a signal processing unit and a warning unit, and immediately remind the operating personnel when it reaches the highest water level line. It saves time and labor, has high measurement efficiency, and reduces labor costs. By setting an inner layer pipe, it is easy to carry out inspection and maintenance, which is conducive to long-term practical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the structure of the pressure measuring tube according to a specific embodiment of the utility model;

[0032] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0033] Figure 3 for Figure 1 A schematic diagram of the structure of the outer tube in the pressure measuring tube shown;

[0034] Figure 4 for Figure 1 A schematic diagram of the structure of the inner tube in the pressure measuring tube shown;

[0035] Description of reference numerals:

[0036] 1. Outer tube; 2. Inner tube; 3. Filter layer; 4. Anti-filter material; 5. Water-stop material; 6. Liquid level sensing unit; 7. Signal processing unit; 8. Warning unit;

[0037] 11. Outer tube; 12. Outer sealing plate; 21. Inner tube; 22. Inner sealing plate;

[0038] 111, outer pipe section; 112, outer transparent section; 113, outer sunken section; 211, inner pipe section; 212, inner transparent section; 213, inner sunken section;

[0039] 112a, first through hole; 212a, second through hole. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0041] First of all, it should be noted that in the following description, some directional words involved in order to clearly illustrate the technical solution of the utility model, such as "periphery", "bottom", etc., all have meanings by analogy with the normal orientations of the components in the pressure measuring tube. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the utility model.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0043] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Example:

[0045] like Figure 1 As shown, an embodiment of the present application discloses a pressure measuring tube, which is suitable for use in monitoring groundwater level, dam infiltration line, dam foundation uplift pressure, seepage around dams and other working conditions. The structure includes: an outer tube 1, an inner tube 2, a filter layer 3, a filter material 4, a water-stopping material 5, a liquid level sensing unit 6, a signal processing unit 7 and a warning unit 8.

[0046] The outer layer pipe 1 is arranged in the pressure measuring well 9 , and comprises an outer tube 11 and an outer sealing plate 12 , wherein the diameter of the pressure measuring well 9 is larger than the outer diameter of the outer layer pipe 1 .

[0047] Exemplarily, the shape of the outer tube 1 is preferably cylindrical for easy installation, but is not limited thereto, and may also be a regular quadrangular prism, a regular triangular prism, a regular hexagonal prism, etc., without specific limitation.

[0048] Specifically, the outer tube 11 has an outer tube section 111, an outer transparent section 112 and an outer sunken section 113 connected from top to bottom, and a plurality of first through holes 112a are opened on the outer periphery of the outer transparent section 112. The first through holes 112a are evenly distributed in a matrix form, and are preferably circular holes, but may also be triangular holes, square holes or other forms, without limitation.

[0049] Specifically, the outer sealing plate 12 is disposed at the bottom of the outer tube 11, preferably connected by welding, but may also be threaded or other forms for easy maintenance.

[0050] The inner tube 2 is movably sleeved in the outer tube 1 , and comprises an inner tube barrel 21 and an inner sealing plate 22 .

[0051] Exemplarily, the shape of the inner tube 2 corresponds to that of the outer tube 1 , and the inner tube 2 is movably inserted into the outer tube 1 , so as to facilitate taking and placing.

[0052] Specifically, the inner tube 21 has an inner tube section 211, an inner transparent section 212 and an inner sunken section 213 connected from top to bottom, and the inner transparent section 212 corresponds to the position of the outer transparent section 112. A plurality of second through holes 212a are opened on the outer periphery of the inner transparent section 212. The second through holes 212a are evenly distributed in a matrix form and are aligned with the first through holes 112a. They are also preferably circular holes, but can also be triangular, square holes or other forms, without limitation. In addition, the inner tube section 211 can be made of PPR material to facilitate the through-setting of the liquid level sensing unit 6.

[0053] Specifically, the inner sealing plate 22 is disposed at the bottom of the inner tube 21, preferably connected by welding, but may also be threaded or other forms for easy maintenance.

[0054] The filter layer 3 is coated on the outer periphery of the outer permeable section 112 and is used to filter the water body to prevent the soil particles around the pipe from entering the inner part of the outer tube 11 .

[0055] Exemplarily, the filter layer 3 includes non-woven geotextile or 180-mesh wire mesh, which has good filtering effect and low material cost, but it can also be other components with filtering effect, without specific limitation.

[0056] The anti-filtration material 4 is filled between the external permeable section 112, the external sinking section 113 and the pressure measuring well 9 to prevent or reduce blockage and pollution of the external permeable section 112, thereby improving the filtering efficiency and maintenance cycle.

[0057] Exemplarily, the filter material 4 includes coarse sand, but is not limited thereto, and may also be other materials having a filter effect, without specific limitation.

[0058] The water-stopping material 5 is filled between the outer pipe section 111 and the pressure measuring well 9 to prevent the soil around the outer pipe section 111 and the water on the surface from entering the outer pipe 1 .

[0059] Exemplarily, the water-stop material 5 includes clay balls, water-swellable water-stop strips, concrete or cement, but is not limited thereto and may also be other materials with a water-stop effect without specific limitation.

[0060] The liquid level sensing unit 6 is disposed through the side wall of the inner pipe section 211 and is used to detect whether the water head height in the pressure measuring tube reaches the highest water level line.

[0061] Exemplarily, the liquid level sensing unit 6 is a duckbill float switch, which, under normal conditions, has a downward swing of the float so that the circuit remains disconnected, and when the liquid level rises to cause the float to rotate to a horizontal state, the circuit is connected. It has the advantages of sensitive detection, long service life, and convenient installation and arrangement. It belongs to an existing design, so the specific structure will not be described in detail.

[0062] The signal processing unit 7 is disposed outside the pressure measuring well 9 and is electrically connected to the liquid level sensing unit 6 , and is used to perform corresponding operations according to the signal sent by the liquid level sensing unit 6 .

[0063] Exemplarily, the signal processing unit 7 is a relay, which can separate the control circuit and the controlled circuit, thereby improving the stability and safety of the system, and has high reliability, is not easily affected by external interference, and can work stably under various working conditions, but is not limited to this and is not specifically limited.

[0064] Specifically, the liquid level sensing unit 6 is electrically connected to the signal processing unit 7 via a transmission cable, and the signal transmission is stable and reliable, and the liquid level sensing unit 6 can be powered, so the actual application effect is good.

[0065] The warning unit 8 is electrically connected to the signal processing unit 7 for alarming.

[0066] Exemplarily, the warning unit 8 is a warning light and / or a buzzer, which can sound an alarm and is arranged on the ground surface, so as to remind the staff that the water head height in the pressure measuring tube has reached the highest water level line.

[0067] The installation method of the above technical solution is as follows:

[0068] Step 1: Determine the position of the pressure measuring tube at the seepage monitoring point according to the actual engineering situation, analyze and determine the maximum and minimum elevations of the soil infiltration line at each monitoring point and the elevation at the pressure measuring tube position, which are used to determine the length of the outer pipe section 111 and the outer transparent section 112 on the outer pipe 1 and the length of the inner pipe section 211 and the inner transparent section 212 on the inner tube 21.

[0069] Step 2: drilling a hole at each monitoring point to a designed depth to form a pressure measuring well 9 , and making the hole diameter of the pressure measuring well 9 larger than the outer diameter of the outer layer pipe 1 .

[0070] Step three: Wrap the filter layer 3 with the external permeable section 112 and bury it in the pressure measuring well 9, fill the anti-filtration material 4 between the external permeable section 112 and the external sinking section 113 and the hole wall of the pressure measuring well 9, and fill the water-stopping material 5 between the external pipe section 111 and the hole wall of the pressure measuring well 9.

[0071] Step 4: Determine the highest water level in the pressure measuring tube according to the on-site conditions, install the liquid level sensing unit 6 on the side wall of the inner tube section 211 corresponding to the highest water level, and then place the inner tube 2 into the outer tube 1.

[0072] Step 5: Arrange the signal processing unit 7 on the ground surface, and then electrically connect the liquid level sensing unit 6 to the signal processing unit 7, thereby completing the pressure measuring tube installation work.

[0073] When in use, the water in the soil penetrates into the pressure measuring well 9, then is initially filtered by the anti-filtration material 4, then is filtered twice by the filter layer 3, and then enters the outer tube 11 through the first through hole 112a on the outer penetration section 112, and finally enters the inner layer tube 2 through the second through hole 212a on the inner penetration section 212 until it reaches the same water level as the water in the soil.

[0074] When the water level in the inner tube 2 reaches the highest water level line, the liquid level sensing unit 6 is triggered to send out a control signal. The signal processing unit 7 receives the control signal and drives the warning unit 8 to start, thereby reminding the operator.

[0075] When the liquid level sensing unit 6 fails, the operator can lift out the inner layer pipe 2 as a whole to inspect the liquid level sensing unit 6, and then put it back into the outer layer pipe 1 after the inspection is completed. There is no need to drill the pressure measuring well 9 again, and the installation steps of the pressure measuring pipe do not need to be repeated, which saves time and effort and facilitates maintenance.

[0076] The utility model is capable of automatically measuring whether the water head height in the pressure measuring tube reaches the highest water level line through the above-mentioned arrangement, and reminding the operating personnel after reaching it, which saves time and labor, has high measurement efficiency, reduces high labor costs, and is easy to inspect and maintain, thus being beneficial to long-term practical use.

[0077] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A pressure measuring tube, characterized in that: include: The outer layer pipe (1) is arranged in the pressure measuring well (9) and comprises The outer tube (11) comprises an outer tube section (111), an outer transparent section (112) and an outer sinking section (113) connected from top to bottom, and a plurality of first through holes (112a) are formed on the outer periphery of the outer transparent section (112). An outer sealing plate (12) is arranged at the bottom of the outer tube (11); The inner tube (2) is movably mounted inside the outer tube (1), and comprises The inner tube (21) comprises an inner tube section (211), an inner permeable section (212) and an inner sinking section (213) connected from top to bottom, wherein the inner permeable section (212) corresponds to the position of the outer permeable section (112), and a plurality of second through holes (212a) are formed on the outer circumference of the inner permeable section (212). An inner sealing plate (22) is arranged at the bottom of the inner tube (21); A filter layer (3) covering the outer periphery of the outer transparent section (112); The filter material (4) is filled between the external permeable section (112), the external sinking section (113) and the pressure measuring well (9); A water-stop material (5) is filled between the outer pipe section (111) and the pressure measuring well (9); A liquid level sensing unit (6) is disposed through the side wall of the inner tube section (211); A signal processing unit (7) is arranged outside the pressure measuring well (9) and is electrically connected to the liquid level sensing unit (6); The warning unit (8) is electrically connected to the signal processing unit (7) and is used for alarming.

2. The pressure measuring tube according to claim 1, characterized in that: The filter layer (3) comprises a non-woven geotextile or a wire mesh.

3. The pressure measuring tube according to claim 1, characterized in that: The reverse filter material (4) comprises coarse sand.

4. The pressure measuring tube according to claim 1, characterized in that: The water-stop material (5) comprises clay balls, water-swelling water-stop strips, concrete or cement.

5. The pressure measuring tube according to claim 1, characterized in that: The liquid level sensing unit (6) is a duckbill type float switch.

6. The pressure measuring tube according to claim 1, characterized in that: The signal processing unit (7) is a relay.

7. The pressure measuring tube according to claim 1, characterized in that: The warning unit (8) is a warning light and / or a buzzer.

8. The pressure measuring tube according to claim 1, characterized in that: The liquid level sensing unit (6) is electrically connected to the signal processing unit (7) via a transmission cable.

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