CN210982159U - Continuous negative pressure water replenishing metering device - Google Patents
Continuous negative pressure water replenishing metering device Download PDFInfo
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- CN210982159U CN210982159U CN201921862025.7U CN201921862025U CN210982159U CN 210982159 U CN210982159 U CN 210982159U CN 201921862025 U CN201921862025 U CN 201921862025U CN 210982159 U CN210982159 U CN 210982159U
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Abstract
The utility model relates to the technical field of municipal engineering measurement, in particular to a continuous negative pressure water replenishing metering device, which comprises a liftable bracket arranged above a water area to be measured, wherein a weighing device is arranged at the upper end of the bracket, and a transparent water storage device with a downward opening is suspended below the weighing device; the water storage device is filled with water, and an opening at the lower end of the water storage device is flush with the liquid level of the water area to be detected. The edge of the lower end opening of the water storage device is of a sawtooth structure; and among all adjacent sawteeth, one sawtooth has an inclination angle towards the inner side of the water storage device, and the other sawtooth has an inclination angle towards the outer side of the water storage device; a certain space exists between adjacent saw teeth along the circumferential direction. A guard ring is connected to the outer side of the water storage device; the lower end of the retainer is positioned below the opening of the water storage device. The utility model discloses the mechanism is simple reasonable, and convenient to use for in the past directly measures the method that the surface of water height descends with the chi, the utility model discloses the accuracy is high, and measures consuming time weak point.
Description
Technical Field
The utility model relates to a municipal works measures technical field, especially relates to a continuous negative pressure moisturizing metering device.
Background
In the current municipal works, the requirement of a water seepage test of a reservoir meets the 'construction and acceptance criteria for water supply and drainage structures project', the requirement of a water seepage test of a pipeline meets the 'construction and acceptance criteria for water supply and drainage pipelines project', and both the two criteria require that all preformed holes are blocked and water cannot seep after the appearance quality of the reservoir or the pipeline is accepted; meanwhile, the water-full soaking time of the reservoir or the pipeline is not less than 24 hours, timing is started when the test water head reaches a specified water head, the water seepage amount is observed, water is continuously supplemented to the test detection area, the liquid level is kept constant, and the observation time of the water seepage amount is not less than 30 minutes; and the water seepage q of the reservoir or the pipeline is obtained by continuously recording for three times;
at present, in a water seepage experiment of a reservoir or a pipeline, the height change of a liquid level is mainly measured manually by using a ruler; obtaining the water seepage amount q by multiplying the measured height by the sectional area of the reservoir or the pipeline; however, for the water storage tank or the pipeline with irregular shape and large area, the method has larger error, longer test time and more disputed results.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the above-mentioned technical problem who exists among the prior art, a continuous negative pressure moisturizing metering device is provided, this device simple structure convenient to use, water storage device not only can realize the real-time moisturizing to cistern or pipeline, changes through the reading moreover, just can calculate the moisturizing volume in the water storage device (the infiltration volume of cistern or pipeline promptly) and moisturizing speed (the infiltration speed of cistern or pipeline promptly) to for cistern and pipeline infiltration are experimental provide the data reference.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a continuous negative pressure water supplementing metering device comprises a lifting support arranged above a water area to be measured, wherein a weighing device is arranged at the upper end of the support, and a transparent water storage device with a downward opening is suspended below the weighing device; the water storage device is filled with water, and an opening at the lower end of the water storage device is flush with the liquid level of the water area to be detected.
Furthermore, the edge of the lower end opening of the water storage device is of a sawtooth structure; and among all adjacent sawteeth, one sawtooth has an inclination angle towards the inner side of the water storage device, and the other sawtooth has an inclination angle towards the outer side of the water storage device; a certain space exists between adjacent saw teeth along the circumferential direction.
Furthermore, a guard ring is connected to the outer side of the water storage device; the lower end of the retainer is positioned below the opening of the water storage device.
Further, the guard ring is a cylindrical shell arranged outside the water storage device; a connecting rod is fixed between the inner wall of the guard ring and the outer wall of the water storage device.
Furthermore, the lower end of the guard ring is inwards and horizontally provided with an extension part with a certain length.
Further, the retainer is also made of transparent material.
Furthermore, a first connecting part is fixed below the weighing device; and the upper end of the water storage device is provided with a second connecting part movably connected with the first connecting part.
Further, the first connecting part and the second connecting part are made of non-elastic materials.
The utility model has the advantages and positive effects that:
the utility model arranges the lifting bracket above the water area to be subjected to the water seepage test, and hoists the water storage device with the negative pressure environment on the bracket, the lower end opening of the water storage device is flush with the liquid level of the water area, so that the liquid level can be reduced once the water area leaks, and the water storage device can supplement water for the water area in an equivalent manner; the water quantity change of the water storage device can be obtained through the weighing device arranged on the bracket, so that data support is provided for calculation.
The utility model discloses the mechanism is simple reasonable, and convenient to use for in the past directly measures the method that the surface of water height descends with the chi, the utility model discloses the accuracy is high, and measures consuming time weak point.
Description of the drawings:
FIG. 1 is a schematic view of a continuous negative pressure water replenishing metering device in a preferred embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a schematic view of the position of the stand according to the preferred embodiment of the present invention;
fig. 4 is a schematic view of a partial sawtooth of the edge of the water storage device in the preferred embodiment of the present invention.
Wherein: 1. a support; 11. a screw rod; 2. a weighing device; 21. a first connecting part; 3. a water storage device; 31. a second connecting part; 32. saw teeth; 4. a retainer; 41. a connecting rod; 42. an extension portion; 5. a ground surface; 6. a pipeline; 61 pipe liquid level.
Detailed Description
The utility model discloses an use the waters that await measuring to explain a continuous negative pressure moisturizing metering device as the infiltration experiment of pipeline as the example, for can further understand the utility model discloses a following embodiment is said to utility model content, characteristics and efficiency to cooperate the drawing detailed description as follows:
as shown in fig. 1 to 4, the utility model discloses a continuous negative pressure water replenishing metering device, which comprises a lifting support 1 arranged above a mountain opening of a pipeline 6, wherein a weighing device 2 is arranged at the center of the upper end of the support 1, and a water storage device 3 with a downward opening is suspended below the weighing device 2; the edge of the lower end opening of the water storage device 3 is flush with the liquid level 61 of the pipeline; because the water storage device 3 is filled with water, the internal air pressure is lower than the external air pressure, and if the liquid level 61 of the pipeline does not drop, the water in the water storage device 3 cannot leak into the pipeline 6;
preferably, a first connecting part 21 is fixed below the weighing device; the upper end of the water storage device 3 is movably connected with the first connecting part 21 through a second connecting part 31 so as to facilitate the assembly and disassembly of the water storage device 3; the first connecting part 21 can be selected to be provided with a hook with a rope, the second connecting part 31 can be selected to be provided with a rope sleeve with one end matched with the hook, and the other end of the rope sleeve is fixed with the upper end of the water storage device 3; the first connecting part 21 and the second connecting part 31 are made of non-elastic materials, so that water inside the water storage device 3 is prevented from being instantly released to the pipeline 6 when the water storage device 3 moves upwards due to the fact that the weight of the water storage device 3 is reduced during water replenishing.
Preferably, the support 1 is a fine-adjustable lifting device controlled by a plurality of vertically arranged threaded screws 11, a support plate is fixed above the threaded screws 11, and the weighing device is placed in the center of the support plate; the stand 1 is mainly used for fine adjustment of the position between the water reservoir 3 and the liquid level 61 of the pipe, which is commercially available in the prior art.
Preferably, the water storage device 3 is made of transparent materials so as to be convenient for observing the change condition of the liquid level inside;
because the liquid level can form a downward curved arc surface in the container, the liquid in the water storage device 3 also has the phenomenon that the water level at the wall surface is lower than the central water level at the lower port, thereby influencing the external air to enter the water storage device 3; in order to eliminate this phenomenon, the water storage means 3 is cylindrical; the edge of the lower end opening of the water storage device 3 is provided with a sawtooth 32 structure; and among all the adjacent saw teeth 32, one saw tooth 32 has an inclination toward the inside of the water storage means 3, and the other saw tooth 32 has an inclination toward the outside of the water storage means 3; a certain space exists between adjacent sawteeth 32 along the circumferential direction; the purpose is to equalize the liquid level pressure and eliminate the water viscosity and air resistance at the wall surface of the water storage device 3, so that the liquid level at the lower port of the water storage device 3 tends to be horizontal, and therefore when the pipeline 6 leaks, air can enter the water storage device 3 in time, and the accuracy of measurement is further ensured.
Preferably, in order to prevent air from entering the water storage device 3 under the condition of non-leakage caused by water surface fluctuation in the pipeline 6, a retainer 4 is connected to the lower half part of the water storage device 3; the lower end of the retainer 4 is positioned below the opening of the water storage device 3. Specifically, the retainer 4 is a cylindrical shell arranged outside the water storage device 3; a connecting rod 41 is fixed between the inner wall of the guard ring 4 and the outer wall of the water storage device 3;
preferably, the lower end of the retainer 4 is horizontally provided with an extension part 42 with a certain length inwards; the extension part 42 can shield the sawteeth 32 on the edge of the water storage device 3 in the vertical direction, so that the water storage device is prevented from being impacted by water surface fluctuation, and the liquid level can be kept balanced.
Preferably, the retainer 4 is also made of transparent material to prevent obstructing the observation of the water storage device 3;
the utility model also discloses a moisturizing and measurement method of continuous negative pressure moisturizing metering device as follows:
s1, placing the bracket 1The water storage device 3 is erected on the ground 5 above the pipeline 6 to be measured, the water storage device 3 filled with water is connected below the weighing device, and the support 1 is adjusted to enable the lower end of the water storage device 3 to be flush with the horizontal plane of the pipeline 6; the reading of the weighing device is the sum G of the gravity of the water storage device 3 and the gravity of the liquid in the water storage device 30(ignoring the gravity of the first connecting part 21 and the second connecting part 31);
s2, once the pipeline 6 leaks, the liquid level 61 of the pipeline drops, air with the same volume as the leaked water immediately enters the water storage device 3 through the gaps of the sawteeth 32 at the lower end of the water storage device 3 due to the fact that a negative pressure environment exists inside the water storage device 3, the air extrudes the water with the same volume to the pipeline 6 from the water storage device 3 for water supplement, namely the volume of the water leaked from the pipeline 6 is equal to the volume of the water supplemented into the pipeline 6 by the water storage device 3, and further the height of the water in the pipeline 6 is kept unchanged all the time; if the pipeline 6 leaks continuously, the water storage device 3 continuously replenishes water; the first bubble is selected to enter the water storage device 3 or at the moment T1When the timing is started, the reading of the weighing device at the time of starting the timing is recorded as G1；
S3, as the water in the water storage device 3 continuously decreases, before the water in the water storage device 3 completely enters the water area to be tested, selecting the time T1The + T timing is finished, and the reading of the weighing device is recorded as G at the moment2(ii) a The water replenishing amount W ═ G in T minutes in the water area to be measured2-G1；
S4, converting the size data of the water area to be measured to obtain the measured seepage qMeasuringAnd compared with the standard value.
For a pipe: q. q.sMeasuring＝W/T·L，
Wherein W is the water supplement amount (L), T is the actually measured water seepage observation time (min), L is the length (m) of the experimental pipe section;
the obtained q isMeasuringThe standard value q specified in the water supply and drainage pipeline engineering construction and acceptance standard is 0.0046D1Comparison of where D1Is the inner diameter of the pipeline; if q isMeasuringIf the water seepage quantity is not more than the standard value q, the water seepage quantity of the pipeline is qualified, otherwise, the water seepage quantity of the pipeline is not qualified.
For a reservoir: q. q.sMeasuring＝W/A·d，
Wherein W is the water supplement amount (L), d is 24h, and A is the total wetted area (m) of the reservoir2) (ii) a The obtained q isMeasuringCompared with the standard value specified in the Water supply and drainage Structure engineering construction and acceptance Standard, the standard specifies that the water seepage quantity of the reinforced concrete structure pool cannot exceed 2L/(m)2D) the water seepage amount of the masonry structure pool is not more than 3L/(m)2·d)。
The utility model discloses changed present cistern and 6 experimental manual measuring test methods of infiltration of pipeline, greatly shortened check-out time (the result is about five minutes), through repeated verification, the measuring result is accurate relatively, and the error is little.
The embodiments of the present invention have been described in detail, but the above description is only for the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (8)
1. The utility model provides a continuous negative pressure moisturizing metering device which characterized in that: the device comprises a lifting support arranged above a water area to be detected, wherein a weighing device is arranged at the upper end of the support, and a transparent water storage device with a downward opening is suspended below the weighing device; the water storage device is filled with water, and an opening at the lower end of the water storage device is flush with the liquid level of the water area to be detected.
2. The continuous negative pressure water replenishing metering device of claim 1, wherein: the edge of the lower end opening of the water storage device is of a sawtooth structure; and among all adjacent sawteeth, one sawtooth has an inclination angle towards the inner side of the water storage device, and the other sawtooth has an inclination angle towards the outer side of the water storage device; a certain space exists between adjacent saw teeth along the circumferential direction.
3. The continuous negative pressure water replenishing metering device of claim 1, wherein: a guard ring is connected to the outer side of the water storage device; the lower end of the retainer is positioned below the opening of the water storage device.
4. The continuous negative pressure water replenishing metering device of claim 3, wherein: the guard ring is a cylindrical shell arranged outside the water storage device; a connecting rod is fixed between the inner wall of the guard ring and the outer wall of the water storage device.
5. The continuous negative pressure water replenishing metering device of claim 3, wherein: the lower end of the guard ring is inwards and horizontally provided with an extending part with a certain length.
6. The continuous negative pressure water replenishing metering device of claim 3, wherein: the retainer is also made of a transparent material.
7. The continuous negative pressure water replenishing metering device of claim 1, wherein: a first connecting part is fixed below the weighing device; and the upper end of the water storage device is provided with a second connecting part movably connected with the first connecting part.
8. The continuous negative pressure water replenishing metering device of claim 7, wherein: the first connecting part and the second connecting part are made of non-elastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862025.7U CN210982159U (en) | 2019-10-31 | 2019-10-31 | Continuous negative pressure water replenishing metering device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921862025.7U CN210982159U (en) | 2019-10-31 | 2019-10-31 | Continuous negative pressure water replenishing metering device |
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| CN210982159U true CN210982159U (en) | 2020-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608990A (en) * | 2019-10-31 | 2019-12-24 | 中国电建市政建设集团有限公司 | Continuous negative-pressure water replenishing metering device and water replenishing metering method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608990A (en) * | 2019-10-31 | 2019-12-24 | 中国电建市政建设集团有限公司 | Continuous negative-pressure water replenishing metering device and water replenishing metering method |
| CN110608990B (en) * | 2019-10-31 | 2024-03-08 | 中国电建市政建设集团有限公司 | Continuous negative pressure water supplementing metering device and water supplementing metering method |
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