Micro differential pressure acquisition system under high water head

Abstract

The utility model provides a micro-differential pressure collecting system under a high water head, and belongs to the technical field of water conservancy projects. Comprising a pressure stabilizing box, a water storage tank, a micro differential pressure sensor, an air pressure detection sensor and lifting equipment, the water storage tank is connected with the pressure stabilizing box through a lower communicating water pipe, and a water level measuring pipe and a pressure gauge are arranged in the water storage tank. The high-pressure end of the micro-differential pressure sensor is connected with the bottom of the water storage tank, the low-pressure end of the micro-differential pressure sensor is connected with the side wall of the pressure stabilizing box through the air pressure detection sensor, and a three-way valve is arranged between the air pressure detection sensor and the micro-differential pressure sensor. An upper communicating water pipe is connected between the liquid level detection tubular column and the water storage tank, and the driving end of the lifting device is connected with the bottom of the pressure stabilizing box. By adopting the micro-differential pressure acquisition system under the high water head, the technical problem of poor test precision caused by backward measurement and data acquisition methods in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water conservancy engineering technical field especially relates to a high water head under micro pressure difference collection system. BACKGROUND

[0002] Water conservancy engineering is for new, reconstruction or expansion housing building and ancillary construction facilities to carry out planning, survey, design and construction, completion and other technical work and the engineering entity that completes and the installation engineering of the line, pipeline, equipment that is matched with it. For water conservancy facilities, usually need to arrange corresponding test equipment in laboratory before construction, utilize micro pressure difference collection device to carry out liquid level and water level change detection, thereby simulate detection to the settlement of dam or hydropower station and other water conservancy structures.

[0003] In the related art, the simulation test of the existing water conservancy facility usually sets a sensor at the bottom or pressure pipeline to collect pressure and monitor the liquid level height during the micro pressure difference collection process. However, in the high water head environment, the hydrological environment is complex and changeable, and the traditional method of collecting pressure by directly setting a sensor is prone to errors due to water flow impact, pressure fluctuation and other reasons, which reduces the accuracy and reliability of pressure data collection and the test precision and reference value. SUMMARY

[0004] The utility model embodiment provides a kind of micro pressure difference collection system under high water head, can solve the technical problem of poor test precision caused by backward measurement and data collection method in relevant technology. The technical solution is as follows:

[0005] The utility model embodiment provides a kind of micro pressure difference collection system under high water head, comprising:

[0006] The pressure stabilizing tank, the water storage tank, the micro pressure difference sensor, the air pressure detection sensor and the lifting device are connected by the lower communication water pipe at the bottom of the water storage tank, the water level measuring pipe is arranged in the water storage tank, the pressure gauge is arranged at the top of the water level measuring pipe, the high voltage end of the micro pressure difference sensor is connected with the bottom of the water storage tank, the low voltage end of the micro pressure difference sensor is connected with the side wall of the pressure stabilizing tank by the air pressure detection sensor, the three-way valve connected with atmosphere is arranged between the air pressure detection sensor and the micro pressure difference sensor, the air release valve and the liquid level detection pipe column penetrating into the interior are arranged at the top of the pressure stabilizing tank, the first water release valve is arranged at the bottom of the pressure stabilizing tank, the height of the insertion end of the liquid level detection pipe column is lower than the height of the connection end of the air pressure detection sensor and the pressure stabilizing tank, the upper communication water pipe is arranged and connected between the liquid level detection pipe column and the water storage tank, and the driving end of the lifting device is connected with the bottom of the pressure stabilizing tank.

[0007] Optionally, the micro pressure difference sensors are arranged in plurality and are arranged at intervals at the bottom of the water storage tank, the low pressure end side of the plurality of micro pressure difference sensors is provided with the three-way valve, and the three-way valve is connected with the air pressure detection sensor.

[0008] Optionally, a switch valve is arranged between the three-way valve and the air pressure detection sensor.

[0009] Optionally, the top of the pressure stabilizing tank is provided with an air pump in communication with the inside.

[0010] Optionally, the top of the liquid level detection pipe column is provided with an upper drain pipe extending into the water storage tank.

[0011] Optionally, the lower communication water pipe comprises a first branch connected with the water storage tank and a second branch, and at least one of the first branch and the second branch is provided with a circulating pump.

[0012] Optionally, the lower communication water pipe is provided with a second drain valve in communication with the outside.

[0013] Optionally, the lifting mechanism is a spiral elevator.

[0014] The technical scheme provided by the embodiment of the utility model has at least the following beneficial effects:

[0015] The high water head micro pressure difference collection system provided by the embodiment of the utility model utilizes the liquid circulation assembly composed of the pressure stabilizing tank connected with the lifting equipment to realize lifting and the fixed water storage tank to simulate the high water head environment, cooperates with the pipeline, the micro pressure difference sensor, the air pressure detection sensor and the pressure gauge on the water level measuring pipe to collect multi-point pressure data, controls through the micro pressure difference sensor and the advanced signal processing algorithm, ensures the liquid surface stability under the high water head environment simulation in the collection process, realizes the accurate collection of the micro pressure difference under the high water head environment, effectively avoids the error caused by water flow impact, pressure fluctuation and other factors in the traditional collection mode, and solves the technical problem of poor test precision caused by backward measurement and data collection method in the related technology. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0017] Figure 1 It is a structure schematic view of the high water head micro pressure difference collection system provided by the embodiment of the utility model.

[0018] In the figure: 1-stabilization tank; 2-water storage tank; 3-micro pressure difference sensor; 4-air pressure detection sensor; 5-lifting device; 6-lower communication water pipe; 7-three-way valve; 8-switching valve; 11-air release valve; 12-liquid level detection pipe column; 13-first water release valve; 14-air pump; 21-water level measuring pipe; 22-pressure gauge; 31-high pressure end; 32-low pressure end; 61-first branch; 62-second branch; 63-circulating pump; 64-second water release valve; 121-upper drainage pipe; 122-upper communication water pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model embodiment will be further described in detail below with the help of the accompanying drawings.

[0020] Figure 1 It is a structure schematic view of the micro pressure difference collection system under high water head provided by the utility model embodiment. As shown in the figure, Figure 1 The utility model embodiment provides a micro pressure difference collection system under high water head, which comprises a stabilization tank 1, a water storage tank 2, a micro pressure difference sensor 3, an air pressure detection sensor 4 and a lifting device 5.

[0021] The bottom of the water storage tank 2 is connected with the bottom of the stabilization tank 1 through a lower communication water pipe 6, the water storage tank 2 is internally provided with a water level measuring pipe 21, and the top of the water level measuring pipe 21 is provided with a pressure gauge 22. The high pressure end 31 of the micro pressure difference sensor 3 is connected with the bottom of the water storage tank 2, the low pressure end 32 of the micro pressure difference sensor 3 is connected with the side wall of the stabilization tank 1 through the air pressure detection sensor 4, and a three-way valve 7 connected with the atmosphere is arranged between the air pressure detection sensor 4 and the micro pressure difference sensor 3. The stabilization tank 1 is provided with an air release valve 11 and a liquid level detection pipe column 12 penetrating into the inside at the top, and is provided with a first water release valve 13 at the bottom, the extension end height of the liquid level detection pipe column 12 is lower than the connection end height of the air pressure detection sensor 4 and the stabilization tank 1, and the upper communication water pipe 122 is connected and arranged between the liquid level detection pipe column 12 and the water storage tank 2. The driving end of the lifting device 5 is connected with the bottom of the stabilization tank 1.

[0022] In the utility model embodiment, the high water head under micro pressure difference collection system through setting has the water storage tank 2 of preset depth simulating water conservancy facilities under high water head environment, after water injection to water storage tank 2, the hydrological environment under high water head is simulated.In the experimental work, the initial pressure tank 1 and water storage tank 2 are all without water, under the control of control equipment such as host computer, the air release valve 11 and first water valve 13 on pressure tank 1, the three-way valve 7 set on the low pressure end 32 side of micro pressure difference sensor 3 are all opened, make micro pressure difference sensor 3 and air pressure detection sensor 4 with atmosphere communication, at this time, through data simulation, micro pressure difference sensor 3 and air pressure detection sensor 4 are adjusted zero respectively.After zero adjustment, close three-way valve 7 and the air release valve 11 and first water valve 13 on pressure tank 1, and inject liquid into water storage tank 2 until the preset liquid level, at the same time of injection, liquid will enter into pressure tank 1 through lower communication water pipe 6.The liquid level in water storage tank 2 will rise with pressure tank 1, the liquid in pressure tank 1 gradually rises to the extension end of liquid level detection pipe column 12, because the air release valve 11 and first water valve 13 on pressure tank 1 are closed, and the liquid in water storage tank 2 will also be filled into liquid level detection pipe column 12 through upper communication water pipe 122, at this time, pressure tank 1 is in closed state isolated from atmosphere, under the action of the gas pressure stored in pressure tank 1, liquid will not continue to rise but enter into liquid level detection pipe column 12 until the liquid level in liquid level detection pipe column 12 reaches the liquid level in water storage tank 2.If the gas pressure in pressure tank 1 is insufficient, then the height of pressure tank 1 can be adjusted by lifting device 5, when the height of pressure tank 1 changes, its internal pressure will also change synchronously, for example, when the height of pressure tank 1 increases, the gas pressure in pressure tank 1 will also increase, and when the height of pressure tank 1 decreases, the gas pressure in pressure tank 1 will also decrease synchronously.The liquid in pressure tank 1 and water storage tank 2 is balanced finally by adjusting the height of pressure tank 1, at this time, the gas pressure value measured by air pressure detection sensor 4 and low pressure end 32 of micro pressure difference sensor 3, and the water pressure value measured by high pressure end 31 of micro pressure difference sensor 3 are consistent, and the value of pressure gauge 22 on the top of water level measuring pipe 21 is also consistent, so the liquid depth in water storage tank 2 can be measured by the value, and the working state adjustment of high water head under micro pressure difference collection system is completed.After that, by adding vibration source in water storage tank 2 or taking other operations, the complex hydrological environment under high water head environment can be simulated, and the micro pressure difference change can be accurately collected by micro pressure difference sensor 3, and further simulation experiment can be carried out.

[0023] The high-head micro-pressure-difference acquisition system provided by the embodiment of the utility model is simulated under high-head environment by a liquid circulation assembly composed of the pressure stabilizing tank 1 connected with the lifting device 5 to realize lifting and the fixed water storage tank 2, multi-point pressure data acquisition is performed in cooperation with the pipeline, the micro-pressure-difference sensor 3, the air pressure detection sensor 4 and the pressure gauge 22 on the water level measuring pipe 21, and the micro-pressure-difference sensor 3 and the advanced signal processing algorithm are controlled to ensure the liquid surface stability under the high-head environment simulation in the acquisition process, realize the accurate acquisition of the micro-pressure-difference under the high-head environment, and effectively avoid the errors caused by water flow impact, pressure fluctuation and other factors in the traditional acquisition mode, thereby solving the technical problem of poor test precision caused by backward measurement and data acquisition methods in the related art.

[0024] Optionally, the micro-pressure-difference sensor 3 is provided with a plurality of micro-pressure-difference sensors 3, and the plurality of micro-pressure-difference sensors 3 are arranged at intervals at the bottom of the water storage tank 2, the low-pressure end 32 side of the plurality of micro-pressure-difference sensors 3 is provided with a three-way valve 7, and the three-way valve 7 is connected with the air pressure detection sensor 4. In the embodiment of the utility model, the micro-pressure-difference sensor 3 is provided with three micro-pressure-difference sensors 3, and each micro-pressure-difference sensor 3 is connected with the three-way valve 7 through a respective branch pipe, the branch pipes are merged at the other end of the three-way valve 7, and finally the branch pipes are led to one end of the air pressure detection sensor 4 and connected with the side wall of the pressure stabilizing tank 1. By arranging a plurality of micro-pressure-difference sensors 3, the pressure of a plurality of positions of the water storage tank 2 can be detected by the plurality of micro-pressure-difference sensors 3 during the liquid level stability adjustment before the liquid level detection of the water storage tank 1, and after the values of the plurality of micro-pressure-difference sensors 3 are stable and consistent, further calculation is performed, so that the test precision is further improved.

[0025] In the embodiment of the utility model, the specific number, interval and relative position of the micro-pressure-difference sensor 3 can be changed and adaptively set according to actual test requirements, and the utility model does not limit this.

[0026] Optionally, a switch valve 8 is arranged between the three-way valve 7 and the air pressure detection sensor 4. In the embodiment of the utility model, when the high-pressure end 31 and the low-pressure end 32 of the micro-pressure-difference sensor 3 are completed, the switch valve 8 can be closed, and the subsequent slight pressure change in the water storage tank 2 is only detected by the micro-pressure-difference sensor 3, so that the influence of the air pressure change on the low-pressure end 32 on the side of the air pressure detection sensor 4 is reduced, and the acquisition accuracy is further improved.

[0027] Optionally, the top of the pressure stabilizing tank 1 is provided with an air pump 14 in communication with the inside. Exemplarily, in the embodiment of the present application, by providing the air pump 14 on the top of the pressure stabilizing tank 1, when the internal air pressure of the pressure stabilizing tank 1 is insufficient due to air leakage of the valve or other reasons, the air pump 14 can be used to supplement air inside, so as to control the air pressure in the pressure stabilizing tank 1 within a preset range, or cooperate to reset to the initial state, and ensure the stable progress of the test.

[0028] Optionally, the top of the liquid level detection pipe column 12 is provided with an upper drain pipe 121 extending into the water storage tank 2. Exemplarily, in the embodiment of the present application, the section of the liquid level detection pipe column 12 that penetrates out of the top of the pressure stabilizing tank 1 is usually long enough to meet the requirement that the liquid level can be flush with the liquid surface in the water storage tank 2 after the liquid enters. However, in special cases, for example, when the air pressure in the pressure stabilizing tank 1 is insufficient and needs to be supplemented by the air pump 14 to ensure the normal working of the liquid level control in the pressure stabilizing tank 1, the liquid level in the liquid level detection pipe column 12 may rise sharply or even overflow instantaneously. At this time, by additionally providing the upper drain pipe 121 extending into the water storage tank 2 at the top, the part of the liquid can be ensured to flow back into the water storage tank 2, avoiding unnecessary waste and trouble caused by outflow, and further improving the practicability.

[0029] It should be noted that, in the embodiment of the present application, since the pressure stabilizing tank 1 needs to be adjusted in height, the pipelines at the joints between the upper communication water pipe 122 provided between the liquid level detection pipe column 12 above the pressure stabilizing tank 1 and the lower communication water pipe 6 are connected in the form of joint and cooperating hose, so as to realize the freedom of relative displacement.

[0030] Optionally, the lower communication water pipe 6 includes a first branch 61 connected with the water storage tank 2 and a second branch 62, and at least one of the first branch 61 and the second branch 62 is provided with a circulating pump 63. Exemplarily, in the embodiment of the present application, the second branch 62 of the lower communication water pipe 6 is provided with the circulating pump 63. Under normal working conditions, the liquid in the water storage tank 2 will enter the pressure stabilizing tank 1 through the first branch 61, and when the first branch 61 has unevacuated air under extreme conditions, the liquid cannot flow smoothly, and then the circulating pump 63 can be controlled to start to provide power for the liquid to flow smoothly from the second branch 62 to the pressure stabilizing tank 1, so as to ensure the stable progress of the test.

[0031] Optionally, the lower communication water pipe 6 is provided with a second drain valve 64 in communication with the outside. Exemplarily, in the embodiment of the present application, after the test is completed, the second drain valve 64 can be opened by the signal control of the upper computer, so that the liquid in the pressure stabilizing tank 1 and the water storage tank 2 enters the lower communication pipe 6 and is finally discharged to the outside through the second drain valve 64, which is simple in structure and convenient to adjust.

[0032] It should be noted that, in the embodiments of the present application, each valve and pressure detection element is feedback controlled through signal processing, realizing low-power operation and significantly reducing energy consumption. At the same time, the modular design and easy maintenance characteristics make the system more convenient and efficient during installation, debugging and later maintenance, reducing the overall operation and maintenance cost.

[0033] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms do not denote any order, quantity, or importance, but are used to distinguish one element from another, and are used only to facilitate the description of the embodiments of the present application. Similarly, the terms "one" or "a" or similar terms do not denote a quantity restriction, but denote the existence of at least one. The terms "include" or "contain" or similar terms mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] The above is only an optional embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A micro-pressure difference collection system under high water head, characterized in that, Include: The steady pressure box (1), the water storage tank (2), the micro pressure difference sensor (3), the air pressure detection sensor (4) and the lifting equipment (5), the water storage tank (2) bottom is connected with the steady pressure box (1) bottom through lower communication water pipe (6), the water storage tank (2) is provided with water level measuring pipe (21) inside, the water level measuring pipe (21) top is provided with pressure gauge (22), the high voltage end (31) of the micro pressure difference sensor (3) is connected with the water storage tank (2) bottom, the low voltage end (32) of the micro pressure difference sensor (3) is connected with the lateral wall of the steady pressure box (1) through the air pressure detection sensor (4), the air pressure detection sensor (4) and the micro pressure difference sensor (3) between one end is connected with the three-way valve (7) of atmosphere, the steady pressure box (1) top is provided with the air release valve (11) and the liquid level detection pipe column (12) that is set to inside, the steady pressure box (1) bottom is provided with first drain valve (13), the liquid level detection pipe column (12) the height of the extension end is lower than the height of the air pressure detection sensor (4) and the connection end of the steady pressure box (1), the liquid level detection pipe column (12) and the water storage tank (2) between connection are provided with upper communication water pipe (122), the drive end of the lifting equipment (5) is connected with the steady pressure box (1) bottom.

2. The micro-pressure difference collection system under high water head according to claim 1, characterized in that, The micro pressure difference sensor (3) is provided with multiple, and is arranged at the water storage tank (2) bottom, and the low voltage end (32) of multiple micro pressure difference sensor (3) is provided with the three-way valve (7) side, and is connected with the air pressure detection sensor (4) through the three-way valve (7).

3. The micro-pressure difference collection system under high water head according to claim 1, characterized in that, The three-way valve (7) and the air pressure detection sensor (4) between setting have switch valve (8).

4. The micro-pressure difference collection system under high water head according to claim 1, characterized in that, The steady pressure box (1) top is provided with the air pump (14) that communicates with inside.

5. The micro-pressure difference collection system under high water head according to claim 1, characterized in that, The liquid level detection pipe column (12) top is provided with the upper drain pipe (121) that extends to the water storage tank (2) inside.

6. The micro-differential pressure collection system under high water head according to any one of claims 1 to 5, characterized in that, The lower communication water pipe (6) includes the first branch (61) and the second branch (62) connected with the water storage tank (2), and at least one of the first branch (61) and the second branch (62) is provided with a circulating pump (63).

7. The micro-differential pressure collection system under high water head according to any one of claims 1 to 5, characterized in that, The lower communication water pipe (6) is provided with the second drain valve (64) that communicates with outside.

8. The micro-differential pressure collection system under high water head according to any one of claims 1 to 5, characterized in that, The lifting equipment (5) is a spiral elevator.

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