CN218068028U - Single-point velocimeter for fluid - Google Patents
Single-point velocimeter for fluid Download PDFInfo
- Publication number
- CN218068028U CN218068028U CN202221878999.6U CN202221878999U CN218068028U CN 218068028 U CN218068028 U CN 218068028U CN 202221878999 U CN202221878999 U CN 202221878999U CN 218068028 U CN218068028 U CN 218068028U
- Authority
- CN
- China
- Prior art keywords
- pressure
- connecting pipe
- pressure measuring
- pitot tube
- measuring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
A single-point velocimeter for fluid relates to velocimeter technical field. The pressure measuring device is connected with the pressure measuring device through a full-pressure connecting pipe and a static-pressure connecting pipe, a direct-current valve is arranged on one side of the pressure measuring device, the pressure measuring device is connected with a water inlet end of the direct-current valve through the connecting pipe, a peristaltic pump is arranged at one end of a water outlet end of the direct-current valve, and the direct-current valve is connected with a water inlet end of the peristaltic pump through the connecting pipe. Adopt the peristaltic pump to make negative pressure environment for the pitot tube can use at any time in negative pressure environment, and is provided with the scale on the pitot tube, and the fluid velocity of flow that can more audio-visual observation different degree of depth has brought very big convenience for the user, has improved the efficiency of measurement work.
Description
Technical Field
The utility model relates to a single-point tachymeter for it is fluidic relates to tachymeter technical field.
Background
In the field investigation process of hydraulic engineering, the flow velocity of different water depth positions is often required to be measured, single-point flow velocity measurement is also required to be carried out at some reservoir local positions, and the requirements for small flow velocity, small water depth and speed measurement at different underwater positions are met.
The prior art has several ways to measure the flow rate: the propeller type speed measurement has certain requirements on water depth, the measured position cannot be accurate to a point, the measured flow speed range needs to be larger than 0.3m/s, and the result is inaccurate when the measured flow speed range is smaller than 0.3 m/s;
ultrasonic waves and ultrasonic wave velocimeters have requirements on the flow velocity of the water surface, the flow velocity is required to be within the range of 0.3m/s to 3m/s, the error of the flow velocity smaller than 0.3m/s is large, the flow velocity meter can only measure the flow velocity of the water surface, cannot measure the flow velocity below the water surface, and has large limitation;
the pitot tube current meter, pitot tube speed measurement are the more ideal method of testing the speed, however the field utilizes pitot tube to test the speed often can touch the difficult problem of making of negative pressure, can adopt artifical mouth to inhale the mode, but is very poor at quality of water, under the more circumstances of aquatic microorganism, inhales with the mouth and is fairly unfavorable to human body, and the poisonous substance that touches aquatic can not inhale with the mouth completely.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to defect among the prior art or not enough, provides a single-point velocimeter for it is fluidic, adopts the peristaltic pump to make negative pressure environment for the pitot tube can use at any time in negative pressure environment, and is provided with the scale on the pitot tube, and the fluid velocity of flow that can more audio-visual observation the different degree of depth has brought very big convenience for the user, has improved the efficiency of measurement work.
In order to achieve the above purpose, the utility model adopts the following technical scheme: it contains pitot tube 1, pressure measurement device 2, pitot tube 1 is connected with pressure measurement device 2 through full pressure connecting pipe 12, static pressure connecting pipe 13, and pressure measurement device 2 one side is provided with direct current valve 3, and pressure measurement device 2 is connected through the connecting pipe with the 3 end of intaking of direct current valve, and 3 play water end one ends of direct current valve are provided with peristaltic pump 4, and direct current valve 3 is connected through the connecting pipe and the 4 end of intaking of peristaltic pump.
The water outlet end of the peristaltic pump 4 is connected with a one-way valve 5 through a connecting pipe.
The pitot tube 1 comprises a pitot tube body 1-1 and a pitot tube handle 1-2, and the pitot tube body 1-1 is vertically arranged at the bottom of the pitot tube handle 1-2.
The pitot tube handle 1-2 is provided with scales 1-2-1, the top of the pitot tube handle 1-2 is also provided with a full pressure port 1-3 and a static pressure port 1-4, the full pressure port 1-3 is connected with the pressure measuring device 2 through a full pressure connecting pipe 12, and the static pressure port 1-4 is connected with the pressure measuring device 2 through a static pressure connecting pipe 13.
The pressure measuring device 2 is provided with a full-pressure measuring pipe 6 and a static pressure measuring pipe 7, and the bottoms of the full-pressure measuring pipe 6 and the static pressure measuring pipe 7 are respectively connected with the pitot tube 1 through a full-pressure connecting pipe 12 and a static pressure connecting pipe 13.
The pressure measuring device 2 is provided with a measuring scale 8, and the measuring scale 8 is at least provided with one.
The pressure measuring device is characterized in that support frames 9 are arranged on two sides of the pressure measuring device 2, the top of each support frame 9 is connected with the pressure measuring device 2 through a screw, and a fixing hole 9-1 is formed in the bottom of each support frame 9.
The top of the pressure measuring device 2 is provided with a three-way connecting pipe 14, two ends of the three-way connecting pipe 14 are connected with a full-pressure measuring pipe 6 and a static-pressure measuring pipe 7 through connecting pipes, and the top of the three-way connecting pipe 14 is connected with the direct current valve 3 through a connecting pipe.
The peristaltic pump 4 is electrically connected with a switch 10 and a power supply 11.
After the technical scheme is adopted, the utility model discloses beneficial effect does: the peristaltic pump is adopted to manufacture the negative pressure environment, so that the pitot tube can be used in the negative pressure environment at any time, and scales are arranged on the pitot tube, so that the flow velocity of fluid at different depths can be observed more visually, great convenience is brought to a user, and the efficiency of measurement work is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic diagram of the frame structure of the present invention;
FIG. 2 is a schematic structural view of a Pitot tube 1 of the present invention;
fig. 3 is a schematic structural view of the measuring scale of the present invention;
fig. 4 is a top view of the middle support frame 9 of the present invention.
Description of reference numerals: the pressure measuring device comprises a pitot tube 1, a pressure measuring device 2, a direct current valve 3, a peristaltic pump 4, a one-way valve 5, a full-pressure measuring tube 6, a static pressure measuring tube 7, a measuring scale 8, a support frame 9, a switch 10, a power supply 11, a full-pressure connecting tube 12, a static pressure connecting tube 13, a pitot tube body 1-1, a pitot tube handle 1-2, a full-pressure port 1-3, a static pressure port 1-4, a fixing hole 9-1 and scales 1-2-1.
Detailed Description
Referring to fig. 1 to 4, the technical solution adopted by the present embodiment is: the pressure measuring device comprises a pitot tube 1 and a pressure measuring device 2, wherein the pitot tube 1 is connected with the pressure measuring device 2 through a full-pressure connecting pipe 12 and a static-pressure connecting pipe 13, a direct-current valve 3 is arranged on one side of the pressure measuring device 2, the pressure measuring device 2 is connected with the water inlet end of the direct-current valve 3 through a connecting pipe, a peristaltic pump 4 is arranged at one end of the water outlet end of the direct-current valve 3, the direct-current valve 3 is connected with the water inlet end of the peristaltic pump 4 through a connecting pipe, the pitot tube 1 comprises a pitot tube body 1-1 and a pitot tube handle 1-2, the pitot tube body 1-1 is vertically arranged at the bottom of the pitot tube handle 1-2, scales 1-2-1 are arranged on the pitot tube handle 1-2, a full-pressure port 1-3 and a static-pressure port 1-4 are arranged at the top of the pitot tube handle 1-2, the full-pressure port 1-3 is connected with the pressure measuring device 2 through a full-pressure connecting pipe 12, and the static-pressure port 1-4 is connected with the pressure measuring device 2 through a static-pressure connecting pipe 13. In the embodiment, a pitot tube is used for measuring the fluid speed, the traditional pitot tube needs to be emptied manually when in use, air is sucked out of the tail end of a pressure measuring device by a nozzle generally, negative pressure is manufactured artificially, the method can be used when a water source is clean, but the air cannot be sucked out by the negative pressure manufactured by the nozzle when in use in an environment with poor water quality, a peristaltic pump 4 is adopted for pumping water and pumping air in the pitot tube 1 and the pressure measuring device 2, bubbles in the pitot tube 1 and the pressure measuring device 2 are evacuated, a negative pressure environment is manufactured, so that the pitot tube 1 and the pressure measuring device 2 can smoothly feed water and measure the pressure, the pitot tube handle 1-2 is provided with scales 1-2-1 which can control the specific depth of a speed measuring point to obtain more prepared measuring data, when equipment is completely immersed, the fluid enters the pressure measuring device 2 from the pitot tube 1, a direct current valve is closed at the moment, and the front-end equipment is ensured to be airtight, and the reading is carried out after the liquid level of the pressure measuring device 2 is stable; two thin tubes are arranged in the pitot tube 1, the orifice of one tube is a full-pressure hole facing the direction of the liquid flow, the kinetic energy of the liquid flow is converted into potential energy after turning at 90 degrees, and the rising height of the liquid in the tube is the total water head Z + P/pg + V ^2/2g at the position; the opening direction of the other pipe is perpendicular to the liquid flow direction and is a static pressure hole, only the pressure of liquid is sensed, the rising height of the liquid in the pipe is the piezometer pipe water head Z + P/pg at the position, namely the water head at the position corresponding to potential energy, the height difference of the liquid levels of the two pipes is the flow velocity water head V ^2/2g at the position, the height difference H of the liquid levels of the two pipes is measured, and then V ^2/2g = H, namely V = (2 gH) ^ 1/2, so that the flow velocity V at the position is indirectly measured; in the whole measuring process, as long as the equipment is in an immersed state, the equipment can be moved at any position under the action of the direct current valve 3, and the flow rate is directly calculated by reading the data of the pressure measuring device 2.
Furthermore, the water outlet end of the peristaltic pump 4 is connected with a one-way valve 5 through a connecting pipe. The flow direction of the one-way valve 5 is the same as the drainage direction of the peristaltic pump 4, and the one-way valve 5 can be opened only under certain pressure, so that the one-way valve 5 can block the passage of fluid after the peristaltic pump 4 is powered off, the air inlet speed of the whole equipment is reduced, and the measurement precision is improved.
Furthermore, the pressure measuring device 2 is provided with a full-pressure measuring pipe 6 and a static pressure measuring pipe 7, the bottoms of the full-pressure measuring pipe 6 and the static pressure measuring pipe 7 are respectively connected with the pitot tube 1 through a full-pressure connecting pipe 12 and a static pressure connecting pipe 13, the pressure measuring device 2 is provided with a measuring scale 8, and the measuring scale 8 is at least provided with one measuring scale. Carry out accurate reading through dipperstick 8 to data, the total pressure piezometric pipe 6 is used for reading high liquid level data, and static pressure piezometric pipe 7 is used for reading low liquid level data, has respectively set up a dipperstick 8 in this embodiment schematic diagram in two piezometric pipe both sides, and reading data that can be more convenient calculates, according to actual production sales demand, can only set up a dipperstick 8 and reach the purpose that reduces the cost.
Furthermore, two sides of the pressure measuring device 2 are provided with support frames 9, the top of each support frame 9 is connected with the pressure measuring device 2 through a screw, and the bottom of each support frame 9 is provided with a fixing hole 9-1. When the on-site measurement is carried out, the pressure measuring device 2 is placed and fixed through the supporting frame 9, when the pressure measuring device 2 is placed at a relatively unstable position or a relatively soft position, a screw or a fixing pin can be driven into the pressure measuring device 2 through the fixing hole 9-1 to fix the pressure measuring device 2, and the pressure measuring device is prevented from falling to influence the measurement.
Furthermore, a three-way connecting pipe 14 is arranged at the top of the pressure measuring device 2, two ends of the three-way connecting pipe 14 are connected with the full-pressure measuring pipe 6 and the static-pressure measuring pipe 7 through connecting pipes, and the top of the three-way connecting pipe 14 is connected with the direct-current valve 3 through a connecting pipe. Two pressure measuring pipes and the direct current valve 3 are connected through the three-way connecting pipe 14, so that the peristaltic pump 4 can conveniently draw water and exhaust air to manufacture a negative pressure working environment after being started, and meanwhile, when the pitot tube 1 is moved to replace a speed measuring point, the flow velocity at any position can be measured in a communicated state.
Further, the peristaltic pump 4 is electrically connected with a switch 10 and a power supply 11.
The utility model discloses a theory of operation: when the device is used, the pressure measuring device 2 is fixed on a measuring carrier through the support frame 9, the pitot tube 1 is discharged into fluid to be measured, the scale 1-2-1 on the pitot tube handle 1-2 can display the insertion depth, so that the depth of the fluid to be measured is selected, the full pressure hole of the pitot tube 1-1 faces the direction of a fluid source, the peristaltic pump 4 is started through the opening of the control switch 10, the direct current valve 3 is opened at the moment, the peristaltic pump 4 pumps water and exhausts air, when no air bubble exists in the pitot tube 1-1, the pitot tube handle 1-2, the full pressure measuring tube 6 and the static pressure measuring tube 7, and the full pressure measuring tube 6 and the static pressure measuring tube 7 are in a measuring range, namely after the liquid level tends to be stable in the measuring tube scale range, the direct current valve 3 is closed, so that no air leakage occurs at the front end of the direct valve 3, the two pressure measuring tubes can keep balance, after the liquid level in the equal pressure measuring tube basically keeps stable, the water level difference is read through the measuring scale, the water level difference is calculated according to V = (2 gH), the specific flow rate is measured, the flow rate is measured at different positions, and different flow rate can be measured, and different flow rate data can be obtained.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A single point velocimeter for fluids, characterized in that: it contains pitot tube (1), pressure measurement device (2), pitot tube (1) is connected with pressure measurement device (2) through full pressure connecting pipe (12), static pressure connecting pipe (13), pressure measurement device (2) one side is provided with direct current valve (3), pressure measurement device (2) are connected through the connecting pipe with direct current valve (3) end of intaking, and direct current valve (3) outlet end one end is provided with peristaltic pump (4), and direct current valve (3) are intake through connecting pipe and peristaltic pump (4) and are held and be connected.
2. A single point velocimeter for fluids according to claim 1, wherein: the water outlet end of the peristaltic pump (4) is connected with a one-way valve (5) through a connecting pipe.
3. A single point velocimeter for fluids according to claim 1, wherein: the pitot tube (1) comprises a pitot tube body (1-1) and a pitot tube handle (1-2), and the pitot tube body (1-1) is vertically arranged at the bottom of the pitot tube handle (1-2).
4. A single point velocimeter for fluids according to claim 3, wherein: the pitot tube is characterized in that scales (1-2-1) are arranged on the pitot tube handle (1-2), a full pressure port (1-3) and a static pressure port (1-4) are further arranged at the top of the pitot tube handle (1-2), the full pressure port (1-3) is connected with a pressure measuring device (2) through a full pressure connecting pipe (12), and the static pressure port (1-4) is connected with the pressure measuring device (2) through a static pressure connecting pipe (13).
5. A single point velocimeter for fluids according to claim 1, wherein: the pressure measuring device (2) is provided with a full-pressure measuring pipe (6) and a static pressure measuring pipe (7), and the bottoms of the full-pressure measuring pipe (6) and the static pressure measuring pipe (7) are respectively connected with the pitot tube (1) through a full-pressure connecting pipe (12) and a static pressure connecting pipe (13).
6. A single point velocimeter for fluids according to claim 1, wherein: the pressure measuring device (2) is provided with at least one measuring scale (8), and the measuring scale (8) is arranged.
7. A single point velocimeter according to claim 1, wherein: two sides of the pressure measuring device (2) are provided with support frames (9), the top of each support frame (9) is connected with the pressure measuring device (2) through a screw, and the bottom of each support frame (9) is provided with a fixing hole (9-1).
8. A single point velocimeter for fluids according to claim 1, wherein: the pressure measuring device is characterized in that a tee joint connecting pipe (14) is arranged at the top of the pressure measuring device (2), two ends of the tee joint connecting pipe (14) are connected with a full-pressure measuring pipe (6) and a static-pressure measuring pipe (7) through connecting pipes, and the top of the tee joint connecting pipe (14) is connected with a direct-current valve (3) through a connecting pipe.
9. A single point velocimeter according to claim 1, wherein: the peristaltic pump (4) is electrically connected with a switch (10) and a power supply (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221878999.6U CN218068028U (en) | 2022-07-21 | 2022-07-21 | Single-point velocimeter for fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221878999.6U CN218068028U (en) | 2022-07-21 | 2022-07-21 | Single-point velocimeter for fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218068028U true CN218068028U (en) | 2022-12-16 |
Family
ID=84400219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221878999.6U Active CN218068028U (en) | 2022-07-21 | 2022-07-21 | Single-point velocimeter for fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218068028U (en) |
-
2022
- 2022-07-21 CN CN202221878999.6U patent/CN218068028U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103471686B (en) | A kind of gas flow standard device and application process thereof | |
| CN218068028U (en) | Single-point velocimeter for fluid | |
| CN104766513B (en) | A kind of pressure signal flow measurement device and flow-measuring method | |
| CN208443605U (en) | A kind of Portable water sampler | |
| CN205302771U (en) | But reynolds experiment appearance of direct measurement pressure differential and velocity of flow | |
| CN111650403B (en) | Doppler current profiler calibration device and calibration method thereof | |
| CN106501215A (en) | A kind of microbubble volumetric concentration measurement apparatus | |
| CN214666973U (en) | Flowmeter for measuring trace gas | |
| CN217712996U (en) | Water pump lift detection device for water pump production | |
| CN205539047U (en) | Pressure sensing formula open channel tachymeter | |
| CN115290527A (en) | Building wall body anti-permeability nondestructive testing equipment considering wind-driven rain effect | |
| CN205067273U (en) | A viscosimeter for determining coating viscosity | |
| CN212301208U (en) | Online fluid viscosity measuring device | |
| CN209945339U (en) | Hydrology flow height monitoring device | |
| CN206040067U (en) | Modified frictional head loss experimental apparatus | |
| CN214472601U (en) | Water level reading control device for double-ring water seepage test | |
| CN219890615U (en) | Flow stabilizer for ultrasonic heat meter | |
| CN219891277U (en) | Electronic pitot tube flow meter | |
| CN109507366A (en) | A kind of jetting type aqueous vapor balancer measured for dissolved gas in water | |
| CN216309107U (en) | Flow instrument convenient to collect bubble | |
| CN205981300U (en) | Speed formula flow device | |
| CN217331277U (en) | Mass flow meter capable of saving energy consumption | |
| CN220339309U (en) | Microbubble detection device based on laser particle sizer | |
| CN207502030U (en) | A kind of defoaming device on water meter detection device | |
| CN214251104U (en) | Plug-in type pipeline air gauge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |