CN205038002U - Water flow scouring shear effect force measuring device - Google Patents
Water flow scouring shear effect force measuring device Download PDFInfo
- Publication number
- CN205038002U CN205038002U CN201520762840.1U CN201520762840U CN205038002U CN 205038002 U CN205038002 U CN 205038002U CN 201520762840 U CN201520762840 U CN 201520762840U CN 205038002 U CN205038002 U CN 205038002U
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- Prior art keywords
- concrete wallboard
- simulation concrete
- simulation
- measuring device
- force measuring
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Abstract
The utility model provides a water flow scouring shear effect force measuring device comprises base, branch, handle, calibrated scale, pendulum rod, simulation concrete wallboard no. 1, simulation concrete wallboard no. 2, pivot, pointer. Base, branch, handle, pivot, the fixed setting of calibrated scale are in the same place, pendulum rod, the fixed setting of pointer are in the same place to articulate in the pivot. The upper and lower section of branch, pendulum rod all are equipped with scalable, fixed establishment. The utility model discloses a water flow scouring shear effect force measuring device, simple structure, convenient operation can survey the shear stress that rivers produced to concreted structure very easily, can provide important calculation parameter for the wearing and tearing of research marine structure, erosion destruction.
Description
Technical field
The utility model belongs to hydraulic engineering field, specifically current scour shear action force measuring device.
Background technology
In the water conservancy and hydropower multi-purpose project of actual motion, the impact great majority of high-velocity flow to concrete for hydraulic structure wall are low-angle state.Containing in the smooth-going current of husky high speed, fine grained suspended sediment all, between several microns to tens microns, moves with high-velocity flow, and with less angle impacts concrete overcurrent wall, concrete material destroys based on the micro mechanics effect of hard silt.Under the flow condition of straight runner, the acting force (i.e. the shear stress of concrete surface) of horizontal direction is the main cause producing wear-out failure.Current to concrete surface shearing force are
f=
k 1 dv 2in/2 formulas:
fthe average shear stress that-high-velocity flow produces solid wall surface;
k 1-the parameter relevant with current character;
d-silt carrying flow density;
v-flow velocity.The shear stress of current to concrete surface does not have measured value, is only that rule of thumb formulae discovery obtains.Reason be current experimental study mostly by means of fine measuring instrument to carry out the measurement of flow shear, and fine measuring instrument is general more valuable, harsh to environmental requirement, this just makes to test larger limitation, tests few people and carry out under therefore carrying out engineering site, long-time, rugged surroundings.Therefore develop a kind of easy current scour shear action force measuring device, to analysis of hydraulic wearing and tearing, erosion attack is very necessary.
Utility model content
In order to solve the above-mentioned technical matters existed in prior art, the utility model provides a kind of current scour shear action force measuring device, is made up of vertical hole, rotating shaft, pointer in the middle of hole vertical in the middle of base, pole, handle, index dial, fork, simulation concrete wallboard one, simulation concrete wallboard one, simulation concrete wallboard two, simulation concrete wallboard two.Described base, pole, handle, rotating shaft, index dial are fixedly installed together.
Further, described fork, pointer are fixedly installed together, and are articulated with in rotating shaft.
Further, the middle vertical hole of simulation concrete wallboard one offered by described simulation concrete wallboard one, vertical hole in the middle of simulation concrete wallboard two offered by simulation concrete wallboard two, and described simulation concrete wallboard one, simulation concrete wallboard two be convenient and fork dismounting by vertical hole in the middle of the middle vertical hole of simulation concrete wallboard one, simulation concrete wallboard two.
Further, upper and lower section of described pole, fork are equipped with scalable, fixed mechanism.
Further, vertical hole in the middle of the simulation concrete wallboard one that simulation concrete panel one, simulation concrete wallboard two can be inserted in described fork lower end, simulation concrete wallboard and middle vertical hole, can easy disassembly; Described simulation concrete wallboard one, simulation concrete wallboard two can rotate around fork, ensure that biside plate face is unanimously stressed.
Further, described simulation concrete wallboard two area of section identical, vertical with simulation concrete wallboard one weight is identical, and concrete panel two side faces area is very little and smooth; The two meet water termination, backwater termination are identical all smooth.
Further, the surface of side plate simulation concrete surface of described simulation concrete wallboard one makes; Area corresponding to concrete panel two side faces is smooth.
Current scour shear action force measuring device disclosed in the utility model, structure is simple, easy to operate, the shear stress that current produce concrete surface can be measured easily, can wear and tear for analysis of hydraulic, erosion attack provides important calculating parameter.
Accompanying drawing explanation
Fig. 1 is current scour shear action force measuring device front schematic view;
Fig. 2 is this device side schematic view;
Fig. 3 is simulation concrete wallboard one schematic diagram;
Fig. 4 is simulation concrete wallboard two schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As Figure 1-4, current scour shear action force measuring device of the present utility model, is made up of vertical hole 71, rotating shaft 8, pointer 9 in the middle of hole 61 vertical in the middle of base 1, pole 2, handle 3, index dial 4, fork 5, simulation concrete wallboard 1, simulation concrete wallboard one, simulation concrete wallboard 27, simulation concrete wallboard two. and wherein base 1, pole 2, handle 3, rotating shaft 8, index dial 4 are fixedly installed together; Fork 5, pointer 9 are fixedly installed together, and are articulated with in rotating shaft; Vertical hole 61 in the middle of simulation concrete wallboard one offered by simulation concrete wallboard 1, vertical hole 71 in the middle of simulation concrete wallboard two offered by simulation concrete wallboard 27, and simulation concrete wallboard 1, simulation concrete wallboard 27 be convenient and fork 5 dismounting by vertical hole 71 in the middle of the middle vertical hole 61 of simulation concrete wallboard one, simulation concrete wallboard two; Upper and lower section of pole 2, fork 5 are equipped with scalable, fixed mechanism, are convenient to the current scour acting force measuring different depth place.Fork 5 lower end can be inserted and be simulated concrete panel 1, the middle vertical hole 61 of simulation concrete wallboard one of simulation concrete wallboard 27, the middle vertical hole 71 of simulation concrete wallboard two, energy easy disassembly; Simulation concrete wallboard 1, simulation concrete wallboard 27 can rotate around fork, ensure that biside plate face is unanimously stressed.Simulation concrete wallboard 27 area of section identical, vertical with simulation concrete wallboard 1 weight is identical, and concrete panel 27 lateralarea is very little and smooth; The two meet water termination, backwater termination are identical all smooth.The surface of side plate simulation concrete surface of simulation concrete wallboard 1 makes; Smooth with the corresponding area in concrete panel 27 side.During test, device pedestal is placed in bottom of river channel, to ensure that whole test process device is in steady state (SS).
Current scour shear action force measuring device principle of work of the present utility model: if simulation concrete wallboard buoyant weight amount is W, area is that A(smooth part area is disregarded), the horizontal direction making it rotate is made a concerted effort for P, P=Wsin
β/ cos
β, the horizontal direction shear stress making it rotate is
t,
t=P/2A=Wsin
β/ 2Acos
β=Wtan
β/ 2A.Can find out from formula, along with fork corner increases
β,required horizontal direction stress is
psharply increase.Simulation concrete wallboard has certain thickness, and current wash away stress much larger than the shear stress to its side to simulation concrete wallboard vertical cross-section, for eliminating this error, devise simulation concrete wallboard two.
When current scour shear action force measuring device of the present utility model specifically uses, change simulation concrete wallboard two, current scour shear action force measuring device base is placed in bottom current, the scouring force of current to simulation concrete wallboard two vertical cross-section makes fork rotate (pointer synchronous axial system), record dial reading and fork corner
β 2, substitute into formula
t 2=Wsin
β 2/ Bcos
2 β 2the scouring force size (the vertical area of section of B--simulation concrete wallboard) of measuring point can be calculated; Unload simulation concrete wallboard two, change simulation concrete wallboard one, repeat above-mentioned steps, record dial reading and fork corner
β 1, substitute into formula
t 1=Wtan
β 1what/2A can calculate measuring point washes away total stress (scouring force with wash away shear force sum),
t 1–
t 2be the current scour shear force of mensuration.
Claims (7)
1. current scour shear action force measuring device, be made up of vertical hole (71), rotating shaft (8), pointer (9) in the middle of hole (61) vertical in the middle of base (1), pole (2), handle (3), index dial (4), fork (5), simulation concrete wallboard one (6), simulation concrete wallboard one, simulation concrete wallboard two (7), simulation concrete wallboard two, it is characterized in that: described base (1), pole (2), handle (3), rotating shaft (8), index dial (4) are fixedly installed together.
2. current scour shear action force measuring device as claimed in claim 1, is characterized in that: described fork (5), pointer (9) are fixedly installed together, and are articulated with in rotating shaft.
3. current scour shear action force measuring device as claimed in claim 1, it is characterized in that: vertical hole (61) in the middle of simulation concrete wallboard one offered by described simulation concrete wallboard one (6), vertical hole (71) in the middle of simulation concrete wallboard two offered by simulation concrete wallboard two (7), simulation concrete wallboard one (6), simulation concrete wallboard two (7) be convenient and fork (5) dismounting by vertical hole (71) in the middle of the middle vertical hole (61) of simulation concrete wallboard one, simulation concrete wallboard two.
4. current scour shear action force measuring device as claimed in claim 1, is characterized in that: upper and lower section of pole (2), fork (5) are equipped with scalable, fixed mechanism.
5. current scour shear action force measuring device as claimed in claim 1, it is characterized in that: fork (5) lower end can be inserted and be simulated concrete panel one (6), the middle vertical hole (61) of simulation concrete wallboard one of simulation concrete wallboard two (7), the middle vertical hole (71) of simulation concrete wallboard two, energy easy disassembly; Described simulation concrete wallboard one (6), simulation concrete wallboard two (7) can rotate around fork, ensure that biside plate face is unanimously stressed.
6. current scour shear action force measuring device as claimed in claim 1, it is characterized in that: described simulation concrete wallboard two (7) is identical with identical, the vertical area of section of simulation concrete wallboard one (6) weight, and concrete panel two (7) lateralarea is very little and smooth; The two meet water termination, backwater termination are identical all smooth.
7. current scour shear action force measuring device as claimed in claim 1, is characterized in that: the surface of side plate simulation concrete surface of described simulation concrete wallboard one (6) makes; Smooth with the corresponding area in concrete panel two (7) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520762840.1U CN205038002U (en) | 2015-09-29 | 2015-09-29 | Water flow scouring shear effect force measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520762840.1U CN205038002U (en) | 2015-09-29 | 2015-09-29 | Water flow scouring shear effect force measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205038002U true CN205038002U (en) | 2016-02-17 |
Family
ID=55296898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520762840.1U Expired - Fee Related CN205038002U (en) | 2015-09-29 | 2015-09-29 | Water flow scouring shear effect force measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205038002U (en) |
-
2015
- 2015-09-29 CN CN201520762840.1U patent/CN205038002U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160217 Termination date: 20160929 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |