CN210571867U - Portable small-flow constant-pressure test water supply device - Google Patents
Portable small-flow constant-pressure test water supply device Download PDFInfo
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Abstract
The utility model discloses a portable little flow constant voltage test water supply installation, include: the portable water storage device, the miniature pressure regulating device and the pressure stabilizing device; the portable water storage device is connected with one end of the miniature pressure regulating device through a water supply pipeline; the water pressure regulating device is used for conveying water into the micro pressure regulating device under the action of water pressure; the other end of the micro pressure regulating device is connected with one end of the pressure stabilizing device through a water outlet pipeline; the water pressure regulating device is used for providing and regulating water pressure to obtain a small-flow constant-pressure water head, and conveying the small-flow constant-pressure water head to the pressure stabilizing device through the water outlet pipeline; the pressure stabilizing device is used for adjusting the pressure of the pulsating water and outputting the adjusted constant-pressure water head with small flow or sending the water head into the permeameter through a connecting pipeline. The utility model provides a but water supply installation is small movable, and the simple installation can connect infiltration appearance or normal position infiltration sample under laboratory or the inconvenient condition of open-air water supply, can realize the penetration test of the weak infiltration soil body or rock specimen under the low pressure state.
Description
Technical Field
The utility model relates to a geotechnical engineering test instrument technical field specifically is a portable little flow constant voltage test water supply installation.
Background
The permeability and the permeability deformation characteristics of the soil or rock weak interlayer are one of important physical and mechanical properties of soil, and are one of basic parameters required for carrying out seepage control, foundation and slope seepage stability analysis, building foundation pit permeability stability evaluation, seepage flow calculation, regional groundwater resource management and evaluation and the like in a hydraulic and hydroelectric engineering junction. In the process of carrying out a permeation deformation test on weak permeability soil or a rock weak interlayer, the permeability ratio applied to a sample in a certain pressure range is gradually reduced from low to high, and the outflow rate is relatively small before permeation damage occurs; if similar tests are carried out in the field, particularly in tunnels, the constant-pressure water supply system is difficult.
One method for obtaining a constant water head in the prior art is to supply water by adopting an overflow type water tank, mainly comprising the overflow type water tank, a water inlet pipe, a water outlet pipe, an overflow pipe and a lifting system, wherein water flow continuously enters the water tank from the water inlet pipe and overflows through the overflow pipe, so that the water head in the water outlet pipe is kept at the height of the water tank, and all levels of water heads required by a test are obtained by adjusting the height of the overflow water tank. The main disadvantages of this method are: because the well-bucket needs the oscilaltion, consequently inlet tube, outlet pipe, warning pipe must adopt the hose, and in the test process, three hoses twine on ground, and area is big, when arranging many sets of this kind of water supply system in the laboratory, seriously influences the laboratory environment, and the external stable water source that needs of inlet tube in addition.
The other method in the prior art is an electromagnetic valve control type water supply system, and the main working principle is that the upper limit and the lower limit of the water level in a water supply cylinder are controlled through a water level measuring needle, and the fluctuation range of the water supply cylinder is smaller than 1 mm. When the water level in the cylinder is lower than the lower limit of the water level, the electromagnetic valve is opened, and water enters the cylinder; when the water level in the cylinder is higher than the upper limit of the water level, the electromagnetic valve is closed, and the water supply to the cylinder is stopped, so that the constant water head is realized. The electromagnetic valve control type water supply system has the advantages that the problems that the water pipes of the overflow bucket type water supply system occupy the land and are wound mutually are solved, and the laboratory is more attractive. But also has some disadvantages: the system needs to be fixed indoors and needs to be externally connected with a stable water source; when the electromagnetic valve is closed and opened, water flow generates impact force to cause water pressure pulsation, and the water level stability of the electromagnetic valve is inferior to that of an overflow water tank type water supply system; when the aquatic contains too much impurity, also cause the solenoid valve to open and close inefficacy easily, still need be equipped with more complicated switch board in addition.
In addition, a method for obtaining a stable water head by adopting a variable-frequency constant-pressure water pump is adopted, and the principle is that the rotating speed of the water pump is mainly adjusted by a frequency converter, so that the automatic pressure adjusting function is realized. When the water inlet pressure is lower than the set pressure, the frequency of the frequency converter is increased, the rotating speed of the water pump is increased, and the water supply pressure is increased; when the water inlet pressure is higher than the set pressure, the frequency of the frequency converter is reduced, the rotating speed of the water pump is reduced, and the water supply pressure is reduced, so that the water supply pressure is stabilized at the set pressure. The water supply of the variable-frequency constant-pressure water pump has the main defects that the water head stability and the precision are insufficient, when the flow is extremely small, the system considers that the water supply is not needed at the moment, and the water pump stops running in order to save electric energy and prolong the service life of the pump; moreover, if the flow is small, the rotating speed of the pump is extremely low, the water supply pressure is unstable, and the test result is seriously influenced.
The other telescopic overflow type constant-pressure water supply device has the characteristics of high precision, large flow and constant-pressure water supply, but the equipment has the defects that the equipment needs to be fixed on an indoor base and is connected with a stable external water source, so that the equipment cannot be used outdoors. To sum up, the problems of the existing constant-pressure water supply equipment are mainly as follows:
1. the conventional overflow water tank occupies a large area and seriously influences the environment of a laboratory.
2. The precision of the electromagnetic valve and the frequency conversion constant pressure water pump test water head is poor, and the test water head is difficult to adapt to a small-flow constant pressure water supply test.
3. When adopting conventional overflow formula water tank, solenoid valve, frequency conversion constant voltage water pump, flexible overflow formula constant voltage test water supply system, need connect outside stable water source, equipment is fixed in the base, does not have portable function.
4. The precision of the electromagnetic valve and the test water head of the variable-frequency constant-pressure water pump is poor, and the water pressure fluctuation has great influence on the test.
SUMMERY OF THE UTILITY MODEL
The utility model provides a portable small discharge constant voltage test water supply installation has solved above-mentioned technical problem.
The utility model provides a portable little flow constant voltage test water supply installation, include: the portable water storage device, the miniature pressure regulating device and the pressure stabilizing device;
the portable water storage device is connected with one end of the miniature pressure regulating device through a water supply pipeline; the portable water storage device is used for conveying water into the micro pressure regulating device through a water supply pipeline under the action of water pressure provided by the micro pressure regulating device;
the other end of the miniature pressure regulating device is connected with one end of the pressure stabilizing device through a water outlet pipeline; the miniature pressure regulating device is used for providing water pressure and regulating the water pressure to obtain a small-flow constant-pressure water head, and the small-flow constant-pressure water head is conveyed into the pressure stabilizing device through the water outlet pipeline;
the pressure stabilizing device is used for adjusting the pulsating water pressure in the water outlet pipeline; and outputting the regulated small-flow constant-pressure water head or conveying the regulated small-flow constant-pressure water head into the permeameter through a connecting pipeline.
Optionally, the miniature pressure regulating device is also used for stepless regulation of water pressure.
Optionally, the miniature voltage regulating device includes: a micro booster pump and a return water regulating valve;
one end of the micro booster pump is connected with the portable water storage device through a water supply pipeline, and the other end of the micro booster pump is connected with the pressure stabilizing device through a water outlet pipeline; the micro booster pump is used for providing water pressure;
the return water regulating valve is arranged on the return water pipeline; one end of the water return pipeline is communicated with the water inlet pipeline, and the other end of the water return pipeline is communicated with the water outlet pipeline; the water return regulating valve is used for regulating the water pressure provided by the micro booster pump to obtain a small-flow constant-pressure water head, so that the micro booster pump conveys the small-flow constant-pressure water head to the pressure stabilizing device through the water outlet pipeline.
Optionally, the pressure stabilizing device comprises a pressure stabilizing container, a pressure measuring meter, an exhaust pipe and an exhaust valve;
one end of the pressure stabilizing container is connected with the miniature pressure regulating device through a water outlet pipeline; the other end is connected with a permeameter through a connecting pipeline;
the pressure stabilizing container is provided with a pressure gauge, and the top of the pressure stabilizing container is provided with an exhaust pipe and an exhaust valve.
Optionally, a micro booster pump and a return water regulating valve; the pressure stabilizing device comprises a pressure stabilizing container, a pressure measuring meter, an exhaust pipe and an exhaust valve;
one end of the micro booster pump is connected with the portable water storage device through a water supply pipeline, and the other end of the micro booster pump is connected with the pressure stabilizing container through a water outlet pipeline;
the return water regulating valve is arranged on the return water pipeline; one end of the water return pipeline is communicated with the water inlet pipeline, and the other end of the water return pipeline is communicated with the water outlet pipeline; the water return regulating valve is used for regulating water pressure provided by the micro booster pump to obtain a small-flow constant-pressure water head, so that the micro booster pump can convey the small-flow constant-pressure water head to the pressure stabilizing container through the water outlet pipeline;
one end of the pressure stabilizing container is connected with the micro booster pump through a water outlet pipeline; the other end is connected with a permeameter through a connecting pipeline; the pressure stabilizing container is provided with a pressure gauge, and the top of the pressure stabilizing container is provided with an exhaust pipe and an exhaust valve; the pressure stabilizing container is used for adjusting the pulsating water pressure in the water outlet pipeline.
Optionally, the water return regulating valve is further used for performing stepless regulation on the water pressure provided by the micro booster pump.
Optionally, the pressure-stabilizing vessel is embodied as a cylindrical plexiglas barrel.
Optionally, the portable water storage device is a plastic bucket.
Optionally, a valve is arranged on a connecting pipeline connecting the pressure stabilizing device and the permeameter; and a water valve is arranged on a water outlet pipeline connected with the miniature pressure regulating device and the pressure stabilizing device.
The utility model has the advantages that: compared with the prior art, the utility model has obvious advantages, because the occupied area is small, the device is small and exquisite, the installation is simple and convenient, the whole device can be portable, and can be connected with a permeameter or an in-situ permeation sample, the permeation test of the weak permeation soil body or rock sample under the low pressure state can be realized, the permeation test in the field tunnel with difficult water supply becomes possible, and a plurality of sets of water supply devices can be simultaneously arranged in a laboratory or the field, so that a plurality of sets of tests can be simultaneously carried out, and the working efficiency is greatly improved; and the water pressure can be adjusted at will in a certain range, so that the small-flow constant-pressure water supply is realized, and the test reliability is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of a portable small-flow constant-pressure test water supply device provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a portable small-flow constant-pressure test water supply device provided in embodiment 2 of the present invention;
in fig. 2: 1-a micro booster pump; 2-water outlet pipeline; 3-a water return pipeline; 4-a backwater regulating valve; 5-portable water supply barrel; 6-water supply line; a 7-water valve; 8-a pressure stabilizing container; 9-a pressure gauge; 10-an exhaust pipe; 11-an exhaust valve; 12-connecting lines; 13-a valve; 14-permeameter connection tube.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
The embodiment provides a portable small flow constant pressure test water supply installation, as shown in fig. 1 includes: the portable water storage device, the miniature pressure regulating device and the pressure stabilizing device;
the portable water storage device is connected with one end of the miniature pressure regulating device through a water supply pipeline; the portable water storage device is used for conveying water into the micro pressure regulating device through a water supply pipeline under the action of water pressure provided by the micro pressure regulating device;
the other end of the miniature pressure regulating device is connected with one end of the pressure stabilizing device through a water outlet pipeline; the micro pressure regulating device is used for providing water pressure and regulating the water pressure to obtain a small-flow constant-pressure water head, and the small-flow constant-pressure water head is conveyed into the pressure stabilizing device through the water outlet pipeline;
the pressure stabilizing device is used for adjusting the pulsating water pressure in the water outlet pipeline; and outputting the regulated small-flow constant-pressure water head or conveying the regulated small-flow constant-pressure water head into the permeameter through a connecting pipeline.
In this embodiment, miniature pressure regulating device can also be used to carry out infinitely variable control to water pressure.
In this embodiment, the miniature voltage regulating device may include: a micro booster pump and a return water regulating valve;
one end of the micro booster pump is connected with the portable water storage device through a water supply pipeline, and the other end of the micro booster pump is connected with the pressure stabilizing device through a water outlet pipeline; the micro booster pump is used for providing water pressure;
the backwater regulating valve is arranged on the backwater pipeline; one end of the water return pipeline is communicated with the water inlet pipeline, and the other end of the water return pipeline is communicated with the water outlet pipeline; the water return regulating valve is used for regulating the water pressure provided by the micro booster pump to obtain a small-flow constant-pressure water head, so that the micro booster pump conveys the small-flow constant-pressure water head to the pressure stabilizing device through the water outlet pipeline.
In this embodiment, the pressure stabilizing device may include a pressure stabilizing container, a pressure gauge, an exhaust pipe, and an exhaust valve;
one end of the pressure stabilizing container is connected with the miniature pressure regulating device through a water outlet pipeline; the pressure stabilizing container is provided with a pressure gauge, and the top of the pressure stabilizing container is provided with an exhaust pipe and an exhaust valve.
The pressure stabilizing container is used for adjusting the pulsating water pressure in the water outlet pipeline and outputting the adjusted constant pressure water head with small flow. In this embodiment, the other end of the pressure stabilizing container may be further connected to the permeameter through a connecting pipe; correspondingly, the regulated constant-pressure water head with small flow is conveyed to the permeameter through the connecting pipeline.
In this embodiment, the miniature voltage regulating device may include: a micro booster pump and a return water regulating valve; the pressure stabilizing device comprises a pressure stabilizing container, a pressure measuring meter, an exhaust pipe and an exhaust valve;
one end of the micro booster pump is connected with the portable water storage device through a water supply pipeline, and the other end of the micro booster pump is connected with the pressure stabilizing container through a water outlet pipeline;
the backwater regulating valve is arranged on the backwater pipeline; one end of the water return pipeline is communicated with the water inlet pipeline, and the other end of the water return pipeline is communicated with the water outlet pipeline; the water return regulating valve is used for regulating the water pressure provided by the micro booster pump to obtain a small-flow constant-pressure water head, so that the micro booster pump conveys the small-flow constant-pressure water head to the pressure stabilizing container through the water outlet pipeline;
one end of the pressure stabilizing container is connected with the micro booster pump through a water outlet pipeline; the other end is connected with a permeameter through a connecting pipeline; the pressure stabilizing container is provided with a pressure gauge, and the top of the pressure stabilizing container is provided with an exhaust pipe and an exhaust valve; the pressure stabilizing container is used for adjusting the pulsating water pressure in the water outlet pipeline.
In this embodiment, the return water regulating valve may also be used to perform stepless regulation on the water pressure provided by the micro booster pump.
In this embodiment, the voltage-stabilizing vessel is preferably embodied as a cylindrical plexiglas barrel.
In this embodiment, preferably, the portable water storage device is a plastic bucket.
In this embodiment, a valve may be further disposed on a connection pipeline connecting the pressure stabilizer and the permeameter; a water valve can be arranged on a water outlet pipeline connected with the miniature pressure regulating device and the pressure stabilizing device.
The embodiment provides a portable small-flow constant-pressure test water supply device which is small in occupied area, small and exquisite and simple and convenient to install, the whole device can be portable, is not influenced by sites and water sources, the water supply flow and the water pressure can be adjusted at will, the device can be connected with a permeameter or an in-situ permeation sample, the permeation test of a weak permeation soil body or a rock sample under a low-pressure state can be realized, and the permeation test in a field tunnel with water supply difficulty becomes possible; a plurality of sets of water supply devices can be arranged in a laboratory or in the field at the same time, so that a plurality of sets of tests can be carried out at the same time, and the working efficiency is greatly improved; stepless pressure regulation between water supply pressures can be realized, the stability precision of the water pressure is less than 1mm, and the requirement of small-flow constant-pressure water supply within a certain pressure range can be realized.
Example 2
The embodiment provides a portable small flow constant pressure test water supply installation, as shown in fig. 2 includes: the portable water storage device, the miniature pressure regulating device and the pressure stabilizing device;
the portable water storage device includes: a portable water supply tub 5; the miniature pressure regulating device includes: a micro booster pump 1 and a return water regulating valve 4; the pressure stabilizing device comprises a pressure stabilizing container 8, a pressure measuring meter 9, an exhaust pipe 10 and an exhaust valve 11;
one end of the micro booster pump 1 is connected with a portable water supply barrel 5 through a water supply pipeline 6, and the other end is connected with a pressure stabilizing container 8 through a water outlet pipeline 2;
the return water regulating valve 4 is arranged on the return water pipeline 2; one end of the water return pipeline 2 is communicated with the water inlet pipeline 6, and the other end is communicated with the water outlet pipeline 2; the water return regulating valve 4 is used for regulating the water pressure provided by the micro booster pump 1 to obtain a small-flow constant-pressure water head, so that the micro booster pump conveys the small-flow constant-pressure water head to the pressure stabilizing container 8 through the water outlet pipeline 2;
one end of the pressure stabilizing container 8 is connected with the micro booster pump 1 through the water outlet pipeline 2; the other end is connected with a permeameter connecting pipe 14 through a connecting pipeline 12; the pressure-stabilizing container 8 is provided with a pressure gauge 9, and the top of the pressure-stabilizing container is provided with an exhaust pipe 10 and an exhaust valve 11; the pressure stabilizing container 8 is used for adjusting the pressure of the pulsating water in the water outlet pipe 2;
a valve 13 can be arranged on a connecting pipeline 12 for connecting the pressure stabilizing container 8 and the permeameter connecting pipe; a water valve 7 can be arranged on the water outlet pipeline 2 connected with the micro booster pump 1 and the pressure stabilizing container 8.
According to the portable small-flow constant-pressure test water supply device, the water supply system provides the highest water pressure when the return water regulating valve 4 is completely closed.
According to the portable small-flow constant-pressure test water supply device, the maximum lift of the micro booster pump 1 is 10m, and the constant water pressure within the range of 0-8 m can be provided under the regulation of the return water regulating valve 4.
In the portable small-flow constant-pressure test water supply device, the pressure stabilizing container 8 is made of transparent organic glass.
As above portable little flow constant voltage test water supply installation, portable water supply bucket 5 passes through water supply line 6 and connects micro-booster pump 1, and portable water supply bucket 5 can provide different volumes according to experimental water consumption needs, and portable water supply bucket 5 can specifically be: portable water supply plastic bucket.
The micro booster pump 1 is a core component of the device, has the maximum lift of 10m, and can provide constant water pressure within the range of 0-8 m under the regulation of a return water regulating valve;
the backwater regulating valve 4 is a key component of the device, when the backwater regulating valve is completely closed, the highest water pressure is provided by a water supply system, the opening of the valve is finely regulated according to the requirement of test pressure, the stepless regulation of the water pressure can be realized, and the precision reaches 1 mm;
the pressure stabilizing container 9 is also a key part of the device and plays a role in adjusting the pressure of the pulsating water in the water outlet pipeline 2;
the working principle is as follows: and (3) closing the water return regulating valve 4, starting the micro booster pump 1, enabling water to flow into the water outlet pipeline 2 through the water supply pipeline 6, enabling the water to enter the pressure stabilizing container 8 through the water valve 7, opening the exhaust valve 11 to discharge gas in the pressure stabilizing container, then closing the exhaust valve 11, and opening the valve 13 to enable the water to pass through for an osmosis test. And then the backwater adjusting valve 4 is adjusted according to the test water pressure requirement to realize the fine adjustment of the water pressure of the system, and the water pressure in each stage of adjusting test is always kept constant before the occurrence of general osmotic damage.
After the test is finished, the micro booster pump 1 is closed, and then other valves are closed in sequence.
The embodiment of the utility model provides a make full use of pipeline backward flow regulation water yield realizes the pressure regulation principle, the accurate water supply installation to 1mm, the highest water level 8m of flood peak pressure that can provide. Different pressure outputs are realized through the micro adjustment of the return water adjusting valve 4. Compared with the prior art, the device has obvious advantages, small occupied area, no need of external stable water source, small size and simple and convenient installation, the whole device can be portable and can be connected with a permeameter or an in-situ permeation sample, the permeation test of the weak permeation soil body or rock sample under a low pressure state can be realized, and the permeation test in a field tunnel with difficult water supply becomes possible; a plurality of water supply devices can be arranged in a laboratory or in the field at the same time, so that a plurality of groups of tests can be carried out at the same time, and the working efficiency is greatly improved; the constant-pressure test water supply is not influenced by a water source, the water supply flow and the water pressure can be adjusted randomly within a certain range, the small-flow constant-pressure water supply is realized, and the test reliability is greatly improved; the water pressure stability precision is less than 1mm, has improved the test precision.
The above description is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a portable little flow constant voltage test water supply installation which characterized in that includes: the portable water storage device, the miniature pressure regulating device and the pressure stabilizing device;
the portable water storage device is connected with one end of the miniature pressure regulating device through a water supply pipeline; the portable water storage device is used for conveying water into the micro pressure regulating device through a water supply pipeline under the action of water pressure provided by the micro pressure regulating device;
the other end of the miniature pressure regulating device is connected with one end of the pressure stabilizing device through a water outlet pipeline; the miniature pressure regulating device is used for providing water pressure and regulating the water pressure to obtain a small-flow constant-pressure water head, and the small-flow constant-pressure water head is conveyed into the pressure stabilizing device through the water outlet pipeline;
the pressure stabilizing device is used for adjusting the pulsating water pressure in the water outlet pipeline; and outputting the regulated small-flow constant-pressure water head or conveying the regulated small-flow constant-pressure water head into the permeameter through a connecting pipeline.
2. The portable small-flow constant-pressure test water supply device as claimed in claim 1, wherein the miniature pressure regulating device is further used for stepless regulation of water pressure.
3. The portable small flow constant pressure test water supply device as claimed in claim 1, wherein the micro pressure regulating device comprises: a micro booster pump and a return water regulating valve;
one end of the micro booster pump is connected with the portable water storage device through a water supply pipeline, and the other end of the micro booster pump is connected with the pressure stabilizing device through a water outlet pipeline; the micro booster pump is used for providing water pressure;
the return water regulating valve is arranged on the return water pipeline; one end of the water return pipeline is communicated with the water inlet pipeline, and the other end of the water return pipeline is communicated with the water outlet pipeline; the water return regulating valve is used for regulating the water pressure provided by the micro booster pump to obtain a small-flow constant-pressure water head, so that the micro booster pump conveys the small-flow constant-pressure water head to the pressure stabilizing device through the water outlet pipeline.
4. The portable small flow constant pressure test water supply device as claimed in claim 1, wherein the pressure stabilizer comprises a pressure stabilizing container, a pressure measuring meter, an exhaust pipe and an exhaust valve;
one end of the pressure stabilizing container is connected with the miniature pressure regulating device through a water outlet pipeline; the other end is connected with a permeameter through a connecting pipeline;
the pressure stabilizing container is provided with a pressure gauge, and the top of the pressure stabilizing container is provided with an exhaust pipe and an exhaust valve.
5. The portable small flow constant pressure test water supply device as claimed in claim 1, wherein the micro pressure regulating device comprises: a micro booster pump and a return water regulating valve; the pressure stabilizing device comprises a pressure stabilizing container, a pressure measuring meter, an exhaust pipe and an exhaust valve;
one end of the micro booster pump is connected with the portable water storage device through a water supply pipeline, and the other end of the micro booster pump is connected with the pressure stabilizing container through a water outlet pipeline;
the return water regulating valve is arranged on the return water pipeline; one end of the water return pipeline is communicated with the water inlet pipeline, and the other end of the water return pipeline is communicated with the water outlet pipeline; the water return regulating valve is used for regulating water pressure provided by the micro booster pump to obtain a small-flow constant-pressure water head, so that the micro booster pump can convey the small-flow constant-pressure water head to the pressure stabilizing container through the water outlet pipeline;
one end of the pressure stabilizing container is connected with the micro booster pump through a water outlet pipeline; the other end is connected with a permeameter through a connecting pipeline; the pressure stabilizing container is provided with a pressure gauge, and the top of the pressure stabilizing container is provided with an exhaust pipe and an exhaust valve; the pressure stabilizing container is used for adjusting the pulsating water pressure in the water outlet pipeline.
6. The portable small-flow constant-pressure test water supply device as claimed in claim 3 or 5, wherein the water return regulating valve is also used for stepless regulation of water pressure provided by the micro booster pump.
7. The portable small flow constant pressure test water supply device as claimed in claim 4 or 5, wherein the pressure-stabilizing vessel is a cylindrical organic glass barrel.
8. The portable small flow constant pressure test water supply device as claimed in any one of claims 1 to 5, wherein the portable water storage device is a plastic bucket.
9. The portable small-flow constant-pressure test water supply device as claimed in any one of claims 1 to 5, wherein a valve is arranged on a connecting pipeline connecting the pressure stabilizing device and the permeameter; and a water valve is arranged on a water outlet pipeline connected with the miniature pressure regulating device and the pressure stabilizing device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921242303.9U CN210571867U (en) | 2019-08-02 | 2019-08-02 | Portable small-flow constant-pressure test water supply device |
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| CN201921242303.9U CN210571867U (en) | 2019-08-02 | 2019-08-02 | Portable small-flow constant-pressure test water supply device |
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| CN210571867U true CN210571867U (en) | 2020-05-19 |
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| CN201921242303.9U Active CN210571867U (en) | 2019-08-02 | 2019-08-02 | Portable small-flow constant-pressure test water supply device |
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