CN209802556U - Test device for measuring dynamic frictional resistance when gate moves water to open and close - Google Patents
Test device for measuring dynamic frictional resistance when gate moves water to open and close Download PDFInfo
- Publication number
- CN209802556U CN209802556U CN201920680795.3U CN201920680795U CN209802556U CN 209802556 U CN209802556 U CN 209802556U CN 201920680795 U CN201920680795 U CN 201920680795U CN 209802556 U CN209802556 U CN 209802556U
- Authority
- CN
- China
- Prior art keywords
- gate
- frictional resistance
- sides
- downstream side
- longitudinal beams
- 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.)
- Expired - Fee Related
Links
Landscapes
- Barrages (AREA)
Abstract
The utility model provides a measure gate and move test device that frictional resistance moved when water rises to close, belongs to hydraulic and hydroelectric engineering steel construction field, including the gate, the gate top is equipped with the gate lug. The device comprises a tension sensor connected to a gate lifting lug; the gate valve comprises supporting sliding blocks arranged on longitudinal beams on two sides of the downstream side of the gate, wherein ceramic bearings are further arranged on the longitudinal beams on two sides of the downstream side of the gate, and the width between the ceramic bearings and a gate groove is smaller than that between the original supporting sliding blocks and the gate groove. When the gate measures the column holding force generated by the ceramic bearing through the tension sensor, the upstream water seal is carried out, under the same working condition, the difference operation is carried out by using the column holding force measured by the ceramic bearing and the holding force measured by the original gate body type, and the frictional resistance between the downstream side of the gate and the gate groove can be calculated. The problem of the actual engineering that the gate falls out of place due to inaccurate friction calculation when the friction of the gate is calculated is solved.
Description
Technical Field
The utility model belongs to hydraulic and hydroelectric engineering steel construction field.
Background
the gate is a movable water retaining structure in a hydraulic building and is used for closing, opening or partially opening a water passing hole so as to control the water level, adjust the flow rate and the like. Therefore, the safety and the stability of the gate have important significance for the normal operation of the hydro-junction. The plane gate has the advantages of simple structure, light use, convenient maintenance, low price, low requirement on the arrangement of buildings and easy realization, and is widely used in hydraulic engineering all the time. However, with the construction of the water conservancy junction engineering of the high dam and the large reservoir, the operation conditions of high water head and large discharge are often required to be met, whether the plane accident gate can be normally closed in moving water or not and the hydrodynamic characteristics of the plane accident gate in the closing process are always the focus problems in the design and application of the gate. In engineering practice, the dead weight of a gate leaf and the pressure of a water column are not enough to overcome frictional resistance when the gate is closed, so that the engineering problem that the gate is blocked or even cannot be completely closed in a plane accident is caused, and the safety of a unit and upstream and downstream buildings is seriously threatened.
At present, in the current design code of the steel gate of the water conservancy and hydropower engineering (SL74-95), a calculation formula of the opening force of a plane gate and a radial gate is given. The previous studies are mostly directed to the opening and closing force of the common down-the-hole plane gate, but the experimental studies about the frictional resistance of the gate are less mentioned, and only a few typical friction coefficients can be selected within a range through the design specification of the steel gate of hydraulic and hydroelectric engineering (SL 74-95). The friction coefficient of steel to steel (dry friction) is 0.15-0.60; friction coefficient of sliding bearing: the friction coefficient of the steel to bronze (dry friction) is 0.16-0.30, and the friction coefficient of the steel-based copper-plastic composite material to chrome-plated steel (stainless steel) is 0.05-0.14 ". The friction coefficients are only given a range, and the specific number of the friction coefficients is determined according to the current situation, so that great blindness exists in calculating the friction force, the obtained friction force is easily larger or smaller due to improper values, and the capacity of the hoist is directly selected improperly. For example, the plane gate of diversion bottom hole of Italpu hydropower station of Brazil and Paraguay has water retaining area of 7.6m × 22m, water head of 140m and total water pressure of 199.81MN (about 19000 t). When the walking support friction force is calculated in the design stage, the selected friction coefficient is 0.1, and the calculation result of the friction force is 1900 t. If the selected coefficient of friction differs by 10% from the actual coefficient of friction, the calculated walking bearing friction differs by 190 t. This is a very surprising deviation, and therefore how to calculate the frictional resistance more scientifically and reasonably in the design phase is very important for the selection of the capacity of the high head gate hoist. If the selection is improper, the light person causes the capacity of the selected hoist to be larger and waste is caused, and the heavy person causes the capacity of the selected hoist to be smaller and the gate cannot be opened in time, so that a major accident is caused, and therefore, the research on the frictional resistance of the gate is very necessary. The utility model relates to an experimental apparatus of dynamic frictional resistance when measurement gate moves water and rises to close of innovation, can be equipped with measure respectively on the plane gate with ceramic bearing support pattern (the frictional force that its produced can be approximate to 0) record the column force of holding that column force and plane gate measured with slider support pattern, the two is poor operation alright directly reachs the gate and produces the method of frictional resistance size at whereabouts in-process and gate slot, its advantage lies in that the gate can directly measure the frictional resistance who produces at the dynamic water door closing in-process, the blind coefficient of friction of choosing produces the error has been avoided. Therefore, the capacity of the hoist can be accurately selected, the holding force of the gate during operation can be increased or reduced, and the smooth closing of the gate can be realized.
Disclosure of Invention
the utility model relates to a device of produced frictional resistance when measuring gate operation for solve plane accident gate and at the water-moving door closing in-process, select improper the hoist capacity of causing because of coefficient of friction and select improper and to the estimation of actual frictional resistance not enough cause be difficult to overcome the door closing card that frictional resistance leads to and hinder, the gate falls actual engineering problem such as not in place. Meanwhile, for a plane accident gate which is put into long-term operation in practice, the frictional resistance of the gate in operation is increased due to the corrosion of water quality and gate slot materials and the like, and the frictional resistance of the gate in operation can be calculated by arranging a ceramic bearing on the gate structure under the condition that the gate slot is limited, so that the method has guiding significance for re-judging the capacity and holding force of the hoist.
The utility model adopts the technical proposal that:
The utility model provides a test device that measurement gate moves water and moves frictional resistance when rising and close, includes the gate, and the gate includes the slabby gate body that door leaf crossbeam and door leaf longeron, gate upstream panel are constituteed, and gate upstream panel is located gate upstream side, and the gate top is equipped with the gate lug. The device comprises a tension sensor connected to a gate lifting lug; the gate valve comprises a supporting sliding block and is arranged on longitudinal beams on two sides of the downstream side of the gate, the longitudinal beams on two sides of the downstream side of the gate are also provided with ceramic bearings, the ceramic bearings are fixed with the longitudinal beams on two sides of the gate, and the width between the ceramic bearings and a gate groove is smaller than that between the original supporting sliding block and the gate groove.
Further, the utility model discloses lay 2 or more than 2 ceramic bearings respectively at the longeron on gate downstream side both sides. Furthermore, 2 ceramic bearings are respectively distributed on the longitudinal beams on the two sides of the downstream side of the gate, and are respectively distributed on the top end and the bottom of the longitudinal beams on the two sides of the downstream side of the gate.
Further, gate bottom be equipped with the gate bottom edge, when the gate whereabouts, the water inlet runner bottom plate contact of gate bottom edge and accident gate slot bottom.
Further, the utility model discloses the gate both sides are equipped with the accident gate slot, and accident gate slot both ends are runner limit wall.
A test method for measuring dynamic frictional resistance when a gate moves water to open and close tests frictional resistance when a plane gate operates by changing plane gate support and water sealing type, and is characterized in that: the original support is changed into a ceramic bearing support without friction force, meanwhile, the original downstream water seal of the gate is completely removed, 2 or more than 2 ceramic bearings are respectively arranged at the top end and the bottom of the longitudinal beam at two sides of the downstream side of the gate, and the arranged ceramic bearings 4 are designed according to the width between the original support and the gate groove on the basis of not influencing the falling of the gate and are smaller than the width between the original support sliding block 2 and the gate groove; the original water seal type is changed into an upstream p-type water seal and a large amount of lubricating materials are coated; when the gate measures the column holding force generated by the ceramic bearing 4 through the tension sensor, the upstream water sealing is carried out, and under the same working condition, the difference operation is carried out by using the column holding force measured by the ceramic shaft 4 and the holding force measured by the original gate body type, so that the frictional resistance between the downstream side of the gate and the gate slot can be calculated.
Further, the utility model discloses on laying ceramic bearing on the gate, mainly place ceramic bearing in the suitable position respectively on the longeron at door leaf both ends, ceramic bearing fixes with the gate longeron.
Further, ceramic bearing support and gate groove's width be less than the width in original support and gate groove, the purpose is for the tighter while of upper reaches water seal also can avoid the original support contact gate groove of gate to produce frictional force, causes measuring error.
Further, frictionless plane gate operational environment be the p type water seal in plane gate upper reaches and scribble the lubricant on the water seal, plane gate low reaches adopt ceramic bearing to support, these both all no frictional force produce.
Further, former gate body type record and hold power and be plane gate can obtain the real-time frictional force of gate at the in-process of work.
The utility model has the advantages that:
1. Through the utility model discloses a device can be under the value coefficient of friction condition of need not, through laying ceramic bearing and changing the water seal type, alright survey actual frictional resistance to reach the purpose of the capacity of accurate selection gate headstock gear, avoid the unnecessary loss.
2. Through the utility model discloses a device measures the method of frictional resistance, can measure the gate through force transducer and close the real-time frictional resistance of in-process to solve gate hoist machine selection of capacity problem and to the problem that the frictional resistance estimation when the gate whereabouts is not enough to lead to the unable whereabouts of gate, reach the effect that the gate closed smoothly in moving water.
3. The utility model has the advantages of easy operation and obvious effect.
Drawings
FIG. 1 is a front view of a plane gate with ceramic bearings arranged.
FIG. 2 is a side view of the laying of a ceramic bearing planar gate.
FIG. 3 is a cross-sectional view of FIG. 1A-A.
FIG. 4 is a cross-sectional view of FIG. 1B-B.
FIG. 5 is a diagram showing the time-dependent changes of the holding force of the original gate body type and the gate body type with ceramic bearings during the process of closing the gate by moving water, which are measured by a tension sensor.
The reference number in the figure is 1, a gate lifting lug; 2 supporting the sliding block; 3, a door leaf longitudinal beam; 4, a ceramic bearing; 5, a door leaf beam; 6 a sluice upstream panel; 7, the bottom edge of the gate; 8, a tension sensor; 9 water inlet flow passage side wall; 10 accident gate slot; 11 water inlet flow channel bottom plate.
Detailed Description
Referring to fig. 1-4, the device for testing frictional resistance during operation of a planar gate of the present invention comprises a gate, wherein the gate comprises a plate-shaped gate body consisting of a leaf beam 5, a leaf longitudinal beam 3 and a gate upstream panel 6, the gate upstream panel 6 is located at the upstream side of the gate, and the top of the gate is provided with a gate lifting lug 1. The gate lifting lug tension sensor is connected to the gate lifting lug 1; the gate valve comprises supporting sliding blocks 2 which are arranged on longitudinal beams on two sides of the downstream side of the gate, wherein ceramic bearings 4 are further arranged on the longitudinal beams on two sides of the downstream side of the gate, and the ceramic bearings 4 are fixed with the longitudinal beams on two sides of the gate. The ceramic bearing 4 is designed according to the width between the original support and the gate slot on the basis of not influencing the falling of the gate, and the ceramic bearing is smaller than the width between the original support type and the gate slot. Referring to fig. 3, the bottom of the gate is provided with a gate bottom edge 7, and when the gate falls, the gate bottom edge 7 contacts the inlet runner floor 11 at the bottom of the emergency gate slot 10. Referring to fig. 4, accident gate slots 10 are formed at both sides of the gate, and a runner side wall is formed at both ends of the accident gate slot 10.
The utility model discloses the method of frictional resistance when test plane gate moves, change original supporting into the ceramic bearing supporting of frictionless power, simultaneously, all remove the original low reaches water seal of gate, lay 2 or more than 2 ceramic bearings respectively in the longeron top on gate downstream side both sides and bottom, mainly place ceramic bearing in the suitable position respectively on the longeron at door leaf both ends, there will be 4 or more than 4 ceramic bearings on the gate, the ceramic bearing quantity 4 that add or be greater than 4 aims at keeping the gate balanced stable at the during operation. The original water seal type is changed into an upstream p-type water seal and a large amount of lubricating materials are coated, so that a frictionless gate working environment can be created. The working environment of the frictionless plane gate is that a p-type water seal is arranged at the upstream of the plane gate, a lubricating material is coated on the water seal, a ceramic bearing is adopted at the downstream of the plane gate for supporting, and both the p-type water seal and the lubricating material have no friction. When the gate measures the column holding force generated by the ceramic bearing through the tension sensor, the upstream water seal is carried out, and under the same working condition, the difference operation is carried out between the column holding force measured by the ceramic bearing and the column holding force measured by the original gate body type, so that the frictional resistance between the downstream side of the gate and the gate slot can be calculated. The holding force measured by the original gate body shape is the real-time friction force of the gate obtained in the working process of the plane gate.
The utility model discloses the width in ceramic bearing supporting and gate groove is less than the width in original supporting and gate groove, and the purpose also can avoid the original supporting contact gate groove of gate to produce frictional force when for the upper reaches water seal is tighter, causes measuring error.
Frictionless plane gate operational environment refer to plane gate upper reaches p type water seal and scribble the lubricating material on the water seal, plane gate low reaches adopt ceramic bearing to support, these both all have the frictional force to produce.
When upstream water level 2515.0m, the rivers are flowed out for the sluice gate, and the gate size that utilizes tension sensor to survey former gate size and lay ceramic bearing holds the power as time's situation of change at the dynamic water door closing in-process as shown in fig. 5, and the landing of gate operation in-process former gate size along with the gate holds the post power and reduces gradually, utilizes the utility model discloses record gate and hold the post power and change along with time basically not, the two is the frictional force at this moment between former size gate downstream side and the gate slot at same moment by subtraction promptly.
Claims (5)
1. The utility model provides a test device that measurement gate moves water and moves frictional resistance when rising and close which characterized by: the gate comprises a plate-shaped gate body consisting of a gate leaf cross beam (5), a gate leaf longitudinal beam (3) and a gate upstream panel (6), wherein the gate upstream panel (6) is positioned on the upstream side of the gate, and the top of the gate is provided with a gate lifting lug (1); comprises a tension sensor (8) connected to a gate lifting lug (1); the gate valve comprises a supporting sliding block (2) arranged on longitudinal beams on two sides of the downstream side of the gate, wherein ceramic bearings (4) are further arranged on the longitudinal beams on two sides of the downstream side of the gate, the ceramic bearings (4) are fixed with the longitudinal beams on two sides of the gate, and the width between the ceramic bearings (4) and a gate groove is smaller than that between the original supporting sliding block (2) and the gate groove.
2. The test device for measuring dynamic frictional resistance of a gate in the process of starting and closing water according to claim 1, wherein: 2 or more than 2 ceramic bearings (4) are respectively arranged on the longitudinal beams on the two sides of the downstream side of the gate.
3. The testing device for measuring dynamic frictional resistance of a gate in the process of starting and closing water according to claim 2, wherein: 2 ceramic bearings (4) are respectively arranged on the longitudinal beams on the two sides of the downstream side of the gate, and are respectively arranged at the top end and the bottom of the longitudinal beams on the two sides of the downstream side of the gate.
4. The test device for measuring dynamic frictional resistance of a gate in the process of starting and closing water according to claim 1, wherein: the bottom of the gate is provided with a gate bottom edge (7), and when the gate falls down, the gate bottom edge (7) is in contact with a water inlet runner bottom plate (11) at the bottom of the accident gate slot (10).
5. The test device for measuring dynamic frictional resistance of a gate in the process of starting and closing water according to claim 1, wherein: accident gate slots (10) are formed in two sides of the gate, and flow channel side walls are arranged at two ends of each accident gate slot (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920680795.3U CN209802556U (en) | 2019-05-14 | 2019-05-14 | Test device for measuring dynamic frictional resistance when gate moves water to open and close |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920680795.3U CN209802556U (en) | 2019-05-14 | 2019-05-14 | Test device for measuring dynamic frictional resistance when gate moves water to open and close |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209802556U true CN209802556U (en) | 2019-12-17 |
Family
ID=68832481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920680795.3U Expired - Fee Related CN209802556U (en) | 2019-05-14 | 2019-05-14 | Test device for measuring dynamic frictional resistance when gate moves water to open and close |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209802556U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068411A (en) * | 2019-05-14 | 2019-07-30 | 天津大学前沿技术研究院 | A kind of measurement gate moves the experimental rig and method of dynamic frictional resistance when water closes |
-
2019
- 2019-05-14 CN CN201920680795.3U patent/CN209802556U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068411A (en) * | 2019-05-14 | 2019-07-30 | 天津大学前沿技术研究院 | A kind of measurement gate moves the experimental rig and method of dynamic frictional resistance when water closes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111642449B (en) | Slope-variable water tank for testing swimming capacity of fishes | |
| CN209802556U (en) | Test device for measuring dynamic frictional resistance when gate moves water to open and close | |
| CN102776869A (en) | No-forecast flood regulation method for cascade hydropower station group | |
| CN111581828A (en) | Calculation method for water level flow relation under tidal river reach gate | |
| CN108560504A (en) | A kind of design door | |
| CN114001710B (en) | High-precision channel flow cross-section area measuring device and measuring method | |
| Li et al. | Influence of auxiliary geometric parameters on discharge capacity of piano key weirs | |
| CN109706906B (en) | Control method for triangular door ship lock opening lock operation | |
| CN209727322U (en) | A kind of experimental rig measuring the quiet frictional resistance of gate | |
| CN108867574A (en) | For the calibration model sluice in numerical simulation and its generally change method | |
| CN208748618U (en) | A kind of design door | |
| CN113338217A (en) | Multifunctional test system for opening and closing gate | |
| CN116625439A (en) | Real-time monitoring device for drainage flow under hydraulic and hydroelectric engineering | |
| CN109537535B (en) | Planar double-section accident gate beneficial to closing door by moving water | |
| CN109537534B (en) | Plane accident gate | |
| Ma et al. | Failure analysis of a leaf gate jammed in closing process | |
| CN107063367B (en) | Curve flow measurement device and flow measurement method | |
| CN214089761U (en) | Flood discharge flow velocity regulation and control device for water utilization | |
| Wahl et al. | Applying the energy-momentum method to radial gate discharge calibration | |
| CN208384570U (en) | For the calibration model sluice in numerical simulation | |
| CN110068411A (en) | A kind of measurement gate moves the experimental rig and method of dynamic frictional resistance when water closes | |
| CN209310875U (en) | A kind of Hydraulic Projects installation water level detecting device structure | |
| CN110068412A (en) | A kind of experimental rig and method measuring the quiet frictional resistance of gate | |
| CN106989721B (en) | River bed washout observation device | |
| CN204177425U (en) | A kind of weir structure of convertible weir water-carrying section shape |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191217 Termination date: 20200514 |