CN212722514U - Water pressure test device - Google Patents
Water pressure test device Download PDFInfo
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- CN212722514U CN212722514U CN202021135951.7U CN202021135951U CN212722514U CN 212722514 U CN212722514 U CN 212722514U CN 202021135951 U CN202021135951 U CN 202021135951U CN 212722514 U CN212722514 U CN 212722514U
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Abstract
The utility model provides a water pressure test device, which comprises a drill rod; the test section of the drill rod is provided with a plug ball plugging section, the water inlet end of the plug ball plugging section is sequentially provided with a flow sensor, a pressure release valve, a booster pump, a perforated pipe and a drill rod joint, and the other end of the plug ball plugging section is sequentially provided with a pressure sensor, a perforated pipe and a drill rod joint. The utility model realizes the pressure measurement in the drill hole, and eliminates the error brought to the calculation result by the inaccuracy of the water column pressure and the pipeline loss pressure; the flow sensor is placed in front of a plug ball sealing body belt in a drill hole, so that the problem that the flow of an orifice is not equal to the actual flow of a test section due to the factors of pipeline sealing, small aperture, pipeline damage and the like is solved; when the underground water level is rich, water is not required to be supplied from the outside, and water in the drill hole is directly used for supplying water to the booster pump through the floral tube; when the plugging ball plugging body belt is not plugged, the indication value of the pressure sensor arranged in the testing section is the pressure generated by the underground water level, and the underground water level can be obtained according to the value.
Description
Technical Field
The utility model relates to a water pressure test device belongs to prevention of seepage curtain, consolidation grout rate of measurement test technical field that permeates water.
Background
According to the technical requirements of 'hydropower engineering drilling water pressure test regulation', when a pressure gauge is installed on a water inlet pipe, the tested pressure P is Pp + Pz-Ps, wherein: pp is the reading of the pressure gauge, Pz is the pressure of the water column from the center of the pressure gauge to the pressure calculation zero line, and Ps is the pressure loss of the pipeline; when the pressure gauge is installed in the return pipe, the pressure P measured is Pp + Pz + Ps, and Pp, Pz, Ps have the same meaning as before.
At the present stage, a pressure sensor and a flow sensor are usually installed near a drilling hole opening for testing the permeability of seepage-proofing curtains and consolidation grouting, the water column pressure of a zero line from the center of a pressure gauge to pressure needs to be known about the height of the underground water level, but dynamic change of the underground water level can be caused when the permeability test is carried out, if the water column pressure is calculated by using the change conditions of the front water level and the rear water level before the test, a certain error can be caused, and the pressure loss of a pipeline is related to the factors such as the consistency of the inner diameter, the smoothness degree, the friction coefficient, the flow velocity in the pipeline, the length of the pipeline and the like, so.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a water pressure test device.
The utility model discloses a following technical scheme can realize.
The utility model provides a water pressure test device, which comprises a drill rod; the test section of the drill rod is provided with a plug ball plugging section, the water inlet end of the plug ball plugging section is sequentially provided with a flow sensor, a pressure release valve, a booster pump, a perforated pipe and a drill rod joint, and the other end of the plug ball plugging section is sequentially provided with a pressure sensor, a perforated pipe and a drill rod joint.
And a pressure relief valve water outlet is formed in the pressure relief valve.
The perforated pipe is provided with a plurality of small holes.
The pressure sensor, the flow sensor, the pressure release valve and the booster pump are connected through electric wires, and extend out of the orifice to be connected with the acquisition host.
The drill rod is of a hollow structure.
The beneficial effects of the utility model reside in that:
1. the pressure is measured in the drill hole, and errors caused by inaccuracy of water column pressure and pipeline loss pressure to a calculation result are eliminated;
2. the flow sensor is placed in front of a plug ball plugging section in a drill hole, so that the problem that the orifice flow is not equal to the actual flow of the testing section due to the factors of pipeline plugging, small aperture, pipeline damage and the like is solved;
3. when the underground water level is rich, water is not required to be supplied from the outside, and water in the drill hole is directly used for supplying water to the booster pump through the floral tube;
4. when the plugging ball plugging section is not plugged, the indication value of the pressure sensor arranged in the testing section is the pressure generated by the underground water level, and the underground water level can be obtained according to the value.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: the method comprises the following steps of 1-drill rod, 2-drill rod joint, 3-perforated pipe, 4-booster pump, 5-pressure relief valve water outlet, 6-pressure relief valve, 7-flow sensor, 8-plug ball blocking section, 9-pressure sensor and 10-drilling.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1, a water pressure test device, without considering pipeline loss, puts a pressure sensor, a flow sensor and a pressure release valve into a borehole 10, including a drill rod 1; be equipped with stopper ball shutoff section 8 on the test section of drilling rod 1, be equipped with flow sensor 7, relief valve 6, booster pump 4, floral tube 3, tool joint 2 in proper order at the end of intaking of stopper ball shutoff section 8, sensor 7 is close to stopper ball shutoff section 8, and the other end is equipped with pressure sensor 9, floral tube 3, tool joint 2 in proper order, and pressure sensor 9 is close to stopper ball shutoff section 8.
And a pressure relief valve water outlet 5 is arranged on the pressure relief valve 6.
The perforated pipe 3 is provided with a plurality of small holes, and water passing through the pressure sensor 9 can flow to the periphery of the test section.
The drill rod 1 is of a hollow structure.
Preferably, the pressure sensor 9 is arranged at the testing section, and the indication value of the pressure gauge is the working pressure, so that the uncertainty of the pipeline pressure and the water column pressure is eliminated, and the tested value is more accurate.
Preferably, install flow sensor 7 at the end of intaking of stopper ball shutoff section 8, flow sensor 7's the end of intaking is equipped with relief valve 6, the end of intaking of relief valve 6 is equipped with booster pump 4, and be equipped with relief valve delivery port 5 on the relief valve 6, this system has realized that there is the pressurized-water of production, can step down through relief valve 6 when water pressure is too high, the water of letting out supplies 4 circulations of booster pump to use through floral tube 3 (there is the aperture all around) again, finally can supply to the test section at comparatively constant pressure water.
Preferably, be provided with floral tube 3 at the end of intaking of booster pump 4, can return the water that the relief valve delivery port 5 flows out to the water inlet of booster pump 4, when groundwater is abundanter, directly regard groundwater as booster pump 4's water supply source, need not to supply water from drilling 10 insides again, improve on-the-spot work efficiency greatly.
Preferably, the drill rod joints 2 can be arranged in quantity according to the requirements of different drilling hole 10 depths and different water pressing test section lengths, and the application flexibility is greatly improved.
Preferably, according to the values of the pressure sensor 9, the flow sensor 6, the section length of the test section and the like, a formula (6.2.7) in the Water and Electricity engineering drilling water pressure test regulation (NB/T35113-
(conventional physical formula) the water permeability of the test section can be calculated.
Specifically, the utility model discloses before carrying out the drilling pressurized-water, carry out drilling 10 according to the standard requirement and wash, confirm the drilling length below drilling rod joint 2 under the stopcock shutoff section 8 according to the section length of drilling 10, increase a plurality of drilling rod joints 2 when necessary, then according to installing floral tube 3, pressure sensor 9, stopcock shutoff section 8, flow sensor 7, relief valve 6, booster pump 4, floral tube 3 in proper order, again according to drilling 10 the degree of depth installation drilling rod 1 and corresponding drilling rod joint 2; wherein, the pressure sensor 9, the flow sensor 7, the pressure release valve 6 and the booster pump 4 are connected by electric wires and extend out of an orifice to be connected with the acquisition host.
Further, when carrying out the rate of permeating water test, need a certain specific pressure value, the utility model discloses utilize the relief valve to reduce the pressure that gets into the test section with unnecessary pressure through the mode of sluicing, the water that comes out from the delivery port of relief valve returns again in drilling, continues to supply with pressure water to the test section behind the booster pump.
Further, the pressure relief valve and the pressure gauge value are connected with the orifice host, the working pressure of the pressure relief valve is adjusted according to the pressure gauge value in the orifice and the set working pressure value, and the pressure of the test section is guaranteed to meet the working requirement.
Further, before the plug ball plugging section 8 deforms and compresses tightly, measuring the pressure value of the pressure sensor 9, and recording the value as P0, wherein if no underground water level exists, the value is zero; and operating the drilling machine, pressing and deforming the plug ball plugging section by utilizing the self weight of the drilling machine and keeping the plug ball plugging section fully contacted with the outer surface of the drill rod and the wall of the drilling hole, thereby ensuring that the plugging effect meets the standard requirement.
Further, the depth of the underground water level can be inversely calculated according to the value P0, if the underground water level is deep, water cannot be added externally, if the underground water level is shallow or not, water can be added into the drill hole through the perforated pipe 3, and the added water can flow into the drill rod or the drill hole through the perforated pipe 3.
Further, the water in the drill hole 10 or the perforated pipe 3 provides water with a certain pressure to the drill rod 1 through the booster pump 4, when the water with the pressure passes through the pressure release valve, if the water pressure exceeds the pressure set by the pressure release valve 6, the redundant water can flow out through the water outlet 5 of the pressure release valve, the water pressure in the plug ball plugging section 8 is guaranteed to be constant, and the flow under a certain pressure is measured through the flow sensor 7.
To sum up, the utility model discloses a combine up-to-date "water and electricity engineering drilling pressurized-water test regulation" NB/T35113 with 2018 standard, put into the drilling rod of pressure section in the drilling with pressure sensor and flow sensor for the value of the manometer of pressure section is the pressure value of testing promptly in the drilling, and the size of flow sensor numerical value is the flow in the test section in the drilling, has eliminated and has put flow sensing when the drill way, when not screwing up or the condition of leaking that the fracture appears between the drilling rod, can lead to the inaccurate problem of its value.
Claims (5)
1. The utility model provides a water pressure test device, includes drilling rod (1), its characterized in that: the test section of drilling rod (1) is equipped with stopper ball shutoff section (8), is equipped with flow sensor (7), relief valve (6), booster pump (4), floral tube (3), drill rod joint (2) in proper order at the end of intaking of stopper ball shutoff section (8), and the other end is equipped with pressure sensor (9), floral tube (3), drill rod joint (2) in proper order.
2. The water pressure test apparatus of claim 1, wherein: and a pressure relief valve water outlet (5) is arranged on the pressure relief valve (6).
3. The water pressure test apparatus of claim 1, wherein: the perforated pipe (3) is provided with a plurality of small holes.
4. The water pressure test apparatus of claim 1, wherein: and the pressure sensor (9), the flow sensor (7), the pressure release valve (6) and the booster pump (4) are connected through electric wires and extend out of the hole opening to be connected with the acquisition host.
5. The water pressure test apparatus of claim 1, wherein: the drill rod (1) is of a hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021135951.7U CN212722514U (en) | 2020-06-18 | 2020-06-18 | Water pressure test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021135951.7U CN212722514U (en) | 2020-06-18 | 2020-06-18 | Water pressure test device |
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| Publication Number | Publication Date |
|---|---|
| CN212722514U true CN212722514U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021135951.7U Active CN212722514U (en) | 2020-06-18 | 2020-06-18 | Water pressure test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216933A (en) * | 2021-05-12 | 2021-08-06 | 中煤科工集团西安研究院有限公司 | Testing device and testing method for hydraulic conveying sieve tube in pressure relief cabin and drill rod |
-
2020
- 2020-06-18 CN CN202021135951.7U patent/CN212722514U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216933A (en) * | 2021-05-12 | 2021-08-06 | 中煤科工集团西安研究院有限公司 | Testing device and testing method for hydraulic conveying sieve tube in pressure relief cabin and drill rod |
| CN113216933B (en) * | 2021-05-12 | 2023-12-22 | 中煤科工集团西安研究院有限公司 | Pressure release cabin, device and method for testing hydraulic conveying sieve tube in drill rod |
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