CN214952075U - Detachable lower scale type bed load sand conveying rate measuring device - Google Patents
Detachable lower scale type bed load sand conveying rate measuring device Download PDFInfo
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- CN214952075U CN214952075U CN202121389171.XU CN202121389171U CN214952075U CN 214952075 U CN214952075 U CN 214952075U CN 202121389171 U CN202121389171 U CN 202121389171U CN 214952075 U CN214952075 U CN 214952075U
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Abstract
A detachable lower scale type bed load sand conveying rate measuring device is characterized in that an electronic balance (1) is arranged in a sand conveying water tank and above a sand collecting pit, a scale basket (2) is hung at the lower end of the electronic balance (1), the scale basket (2) is hung with the electronic balance (1) through a steel rod (3), and the measuring device is rapidly detached through screwing. The detachable lower scale type bed load sand conveying rate measuring device of the utility model, through the arrangement, the arrangement that the sand collecting funnel is relatively fixed in the past is omitted, and the free arrangement of the position of the measuring device and the quick detachment of the scale basket are realized; furthermore, the weighing basket is hung by a steel rod, so that the problem of influence on measurement caused by shaking of the weighing basket due to water flow is weakened by means of hardness of the material; the designed baffle and the sand guide plate can guide silt to fall down and inhibit the influence of local upwelling of the inner wall of the pit.
Description
Technical Field
The utility model belongs to the basin experiment field of simulation river or the nearly end of waters husky power in waters, concretely relates to detachable lower title formula bed load defeated husky rate measuring device.
Background
The strength of water flow carrying silt can be expressed by the silt transportation rate, which means the amount of silt passing through a specific section in unit time, and can be divided into suspended load silt transportation rate and bed load silt transportation rate according to two movement modes of silt.
The bed load sand transport rate refers to the transport quantity of bed load particles under specific water flow conditions and bed sand conditions, and is an important parameter for analyzing the composition of a bed surface, the deformation of the bed surface and the scouring and silting of a river bed. At present, the research on the moving mechanism of the bed load in the sediment moving mechanics is basically carried out in a water tank, and the process mainly comprises the following steps: firstly, according to the characteristics of the researched sediment particles, bed sand is laid, then water flow is discharged, the movement characteristics of the sediment particles under different water flow strength conditions are researched, and the relationship between the water flow conditions and the sediment transport rate of bed load is established. The bed surface particles which do not participate in movement are difficult to distinguish due to the fact that the movement of the bed load is mainly concentrated on the near-bottom bed surface, and therefore the bed surface particles are difficult to distinguish, and the measurement of the sand transport rate of the bed load is one of the difficulties in the water tank model test.
The existing method for measuring the sediment transport rate of bed load mainly comprises the following steps: and sampling at the tail part of the water tank, manually measuring, arranging a sand-connected hopper at the tail part of the water tank, weighing in real time by using an electronic balance, adjusting the sand adding amount, controlling the bed surface deformation similarity method and the like. The real-time weighing measurement by using the electronic balance is realized by arranging a sealed sand receiving box, a sand receiving funnel and a sand receiving basket at the tail part of a test water tank or a model, wherein the sand receiving basket is positioned in the sand receiving box, is connected below the sand receiving funnel and is hung on the electronic balance positioned on the sand receiving basket. The sand receiving baskets are generally connected in a lifting rope mode.
The application numbers are: the invention application of CN201611027469.X discloses a non-contact bed load sand transport rate measuring device and a non-contact bed load sand transport rate measuring method, wherein the measuring device comprises a triangular bed load collecting device, an elevation measuring device and a control and analysis system, the device adopts non-contact measurement, the elevation change of the bottom of a triangular groove is measured by a laser probe, and the elevation change of a bed surface is analyzed by the control and analysis system to obtain the bed load sand transport rate. Aiming at the device, the invention provides a method for measuring the sediment transport rate of bed load, which calculates the sediment volume of the sediment in a tank according to the heights of a triangular groove measured at the front moment and the rear moment, and obtains the mass of the bed load by multiplying the dry volume weight of the sediment. Dividing the mass of settled silt by the time interval of two measurements gives the rate of sediment transport of the bed load at a certain moment. The device and the measuring method realize real-time and continuous measurement of the bed load sand transporting rate and measurement of the sand transporting rate at any point in a research area.
The application numbers are: the invention application of CN201710316305.7 discloses a detachable high-precision continuous sand-taking bed-load sand-transporting rate measuring device, which mainly comprises two parts, namely a sand-collecting inner cylinder and a sand-collecting outer cylinder, wherein the sand-collecting outer cylinder is positioned below the sand-collecting inner cylinder, a circular turning plate is arranged inside the sand-collecting inner cylinder, the sand-collecting inner cylinder is divided into an upper sand-collecting layer and a lower sand-taking layer, the circular turning plate is connected with a rotating shaft outside the sand-collecting inner cylinder, the circular turning plate is turned through the rotating shaft, a water inlet and exhaust pipe is arranged on the cylinder wall of the sand-collecting inner cylinder and positioned below the circular turning plate, the water inlet and exhaust pipe is connected with the tail part of a water tank through a connecting rubber hose, the lower part of the sand-taking layer of the sand-collecting inner cylinder extends into the sand-collecting outer cylinder and gradually closes up to form an inverted cone table, and the bottom of the inverted cone is further provided with a circular baffle.
SUMMERY OF THE UTILITY MODEL
For providing a set up more portably and measure the more accurate defeated husky rate of numerical value, the utility model provides a formula bed load defeated husky rate measuring device is called down to detachable, its technical scheme specifically as follows:
the utility model provides a formula bed load sand conveying rate measuring device that can dismantle which characterized in that:
an electronic balance (1) is arranged in the sand conveying water tank and above the sand collecting pit,
a weighing basket (2) is hung at the lower end of the electronic balance (1),
the weighing basket (2) is hung on the electronic balance (1) through the arranged steel rod (3).
According to the utility model discloses a formula bed load sand conveying rate measuring device is called down to detachable, its characterized in that:
along the direction of the water flow,
arranging a sand guide plate (4) at the side end of the weighing basket (2) where water flows in;
a baffle (5) is arranged at the side end of the weighing basket (2) where water flows out.
According to the utility model discloses a formula bed load sand conveying rate measuring device is called down to detachable, its characterized in that:
the steel rod (3) is detachably suspended, and accordingly, the weighing basket (2) is detachable.
According to the utility model discloses a formula bed load sand conveying rate measuring device is called down to detachable, its characterized in that:
establishing constraint points at the middle points of the four sides of the weighing basket, arranging connecting rods at the respective constraint points,
the connecting rods are fixedly arranged on the steel rods (3) in a space-symmetrical mode.
According to the utility model discloses a formula bed load sand conveying rate measuring device is called down to detachable, its characterized in that:
the detachability of the steel rod is established in a screw-on manner.
According to the utility model discloses a formula bed load sand conveying rate measuring device is called down to detachable, its characterized in that:
the steel pole is solid screw-thread steel pole, the cross-section of solid screw-thread steel pole is circular.
According to the utility model discloses a formula bed load sand conveying rate measuring device is called down to detachable, its characterized in that:
the radius of the circle is 5-7 mm.
The invention discloses a detachable lower scale bed load sand conveying rate measuring device, which is characterized in that:
the sand guide plate is arranged upwards at an angle of 45 degrees with the horizontal plane, and the set size is 1cm long;
the sand guide plate has the function of sand guide, and also has the function of obviously inhibiting the ascending influence of the side wall in the pit, thereby being beneficial to the timely silt falling and deposition in the sand collecting box.
The detachable lower scale type bed load sand conveying rate measuring device of the utility model can realize free arrangement and convenient detachment; the measuring structure consisting of the sand collecting pit, the weighing basket and the electronic balance is established by the arranged weighing basket, the sand guide plate arranged at the side end of the weighing basket and the screw connection structure arranged on the connecting steel rod, so that the arrangement that the sand collecting hopper is relatively fixed in the past is omitted, and the free arrangement of the position of the measuring device and the quick detachment of the weighing basket are realized; furthermore, the weighing basket is hung by a steel rod, so that the problem of influence on measurement caused by shaking of the weighing basket due to water flow is weakened by means of hardness of the material; the sand guide plate is arranged to facilitate the introduction of silt into the weighing basket, so that the silt falling into the lower sand collecting pit is reduced; baffle and the setting of leading the husky board simultaneously, all can play the guide silt and fall to become silted up and restrain the influence that the local upwelling of sand collection pit side wall again, the utility model discloses a defeated husky rate measuring device of bed load, through the aforesaid setting, look for the factor and establish the countermeasure separately, serve the measuring accuracy jointly from a plurality of angles of measuring the influence.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the flow field distribution of the basket and the sand guide plate of the present invention;
FIG. 3 is a schematic view of the flow field distribution of the present invention in which the basket is not provided with the sand guide plate;
fig. 4 is the flow field distribution schematic diagram of the utility model without weighing basket.
In the figure, the position of the upper end of the main shaft,
1-an electronic balance;
2-weighing a basket;
3-a steel rod;
4-a sand guide plate;
5-baffle plate.
Detailed Description
Next, a bed load sand transporting rate measuring apparatus according to the present invention will be described in further detail with reference to the drawings and embodiments.
A removable bottom-weighing bed load sand transport rate measuring device as shown in figure 1,
an electronic balance (1) is arranged in the sand conveying water tank and above the sand collecting pit,
a weighing basket (2) is hung at the lower end of the electronic balance (1),
the weighing basket (2) is hung on the electronic balance (1) through the arranged steel rod (3).
Wherein the content of the first and second substances,
along the direction of the water flow,
arranging a sand guide plate (4) at the side end of the weighing basket (2) where water flows in;
a baffle (5) is arranged at the side end of the weighing basket (2) where water flows out.
Wherein the content of the first and second substances,
the steel rod (3) is detachably suspended, and accordingly, the weighing basket (2) is detachable.
Wherein the content of the first and second substances,
establishing constraint points at the middle points of the four sides of the weighing basket, arranging connecting rods at the respective constraint points,
the connecting rods are fixedly arranged on the steel rods (3) in a space-symmetrical mode.
Wherein the content of the first and second substances,
the detachability of the steel rod is established in a screw-on manner.
Wherein the content of the first and second substances,
the steel pole is solid screw-thread steel pole, the cross-section of solid screw-thread steel pole is circular.
Wherein the content of the first and second substances,
the radius of the circle is 5-7mm, preferably 6 mm.
Wherein the content of the first and second substances,
the sand guide plate is arranged upwards at an angle of 45 degrees with the horizontal plane, and the set size is 1cm long;
the sand guide plate has the function of sand guide, and also has the function of obviously inhibiting the ascending influence of the side wall in the pit, thereby being beneficial to the timely silt falling and deposition in the sand collecting box.
Working process, principle and embodiment
Firstly, the upstream flow and the downstream tail gate opening degree are adjusted to obtain the calibration relation between the upstream flow and the downstream tail gate opening degree under the requirement of constant test water tank depth.
Secondly, the bed surface is leveled, the water flow slowly conveyed by the electromagnetic flow pump is carried out, the offset sediment is basically in a static state during the period, and the bed surface can be tested by the offset sediment conveying water tank after the water tank reaches the test water depth requirement.
And then, based on the determined calibration relation between the upstream flow and the downstream tail gate opening, increasing the upstream flow through an electromagnetic flow pump, and adjusting the downstream tail gate opening to enable the test water depth to meet the design requirement. When the bed surface shifting mass silt starts to move and is transported to a sand measurement water area, the silt enters the weighing basket through the sand guide plate arranged at the side end of the weighing basket due to loss of bed surface support, the total weight of the weighing basket and the bed load is read in real time through the electronic balance, finally, the corresponding bed load sand transportation rate is calculated according to the independent underwater weight of the weighing basket and the whole bed load, and the electronic balance can ensure the measurement accuracy. After the measurement is finished, the steel rod established by the threaded connection can be disassembled, so that the basket is disassembled. Because the lower end of the weighing basket has a small amount of sand leakage, when the sand conveying rate is actually calculated, a small amount of sand below the weighing basket needs to be manually recovered, and the sand conveying rate of the bed ballast is partially corrected according to the sand leakage, so that the final sand conveying rate calculation is completed. And assembling the test piece again in the next test.
The detachable lower scale type bed load sand conveying rate measuring device of the utility model can realize free arrangement and convenient detachment; the measuring structure consisting of the sand collecting pit, the weighing basket and the electronic balance is established by the arranged weighing basket, the sand guide plate arranged at the side end of the weighing basket and the screw connection structure arranged on the connecting steel rod, so that the arrangement that the sand collecting hopper is relatively fixed in the past is omitted, and the free arrangement of the position of the measuring device and the quick detachment of the weighing basket are realized; furthermore, the weighing basket is hung by a steel rod, so that the problem of influence on measurement caused by shaking of the weighing basket due to water flow is weakened by means of hardness of the material; the sand guide plate and the horizontal plane are arranged in an upward inclined mode at an angle of 45 degrees, the length of the sand guide plate is 1cm, the sand guide plate and the horizontal plane are arranged, two factors of water flow velocity and upwelling influence are comprehensively considered, and by observing the flow field distribution in figures 2, 3 and 4, the upwelling is obviously inhibited and can be timely silted; the silt is guided into the weighing basket, so that the silt falling into the lower sand collecting pit is reduced; baffle and the setting of leading the husky board simultaneously, all can play the guide silt and fall to become silted up and restrain the influence that the local upwelling of sand collection pit side wall again, the utility model discloses a defeated husky rate measuring device of bed load, through the aforesaid setting, look for the factor and establish the countermeasure separately, serve the measuring accuracy jointly from a plurality of angles of measuring the influence.
Claims (8)
1. The utility model provides a formula bed load sand conveying rate measuring device that can dismantle which characterized in that:
an electronic balance (1) is arranged in the sand conveying water tank and above the sand collecting pit,
a weighing basket (2) is hung at the lower end of the electronic balance (1),
the weighing basket (2) is hung on the electronic balance (1) through the arranged steel rod (3).
2. A removable down-balance bed load sand transport rate measuring device according to claim 1, wherein: along the direction of the water flow,
arranging a sand guide plate (4) at the side end of the weighing basket (2) where water flows in;
a baffle (5) is arranged at the side end of the weighing basket (2) where water flows out.
3. A removable down-balance bed load sand transport rate measuring device according to claim 1, wherein: the steel rod (3) is detachably suspended, and accordingly, the weighing basket (2) is detachable.
4. A removable down-balance bed load sand transport rate measuring device according to claim 1, wherein: establishing constraint points at the middle points of the four sides of the weighing basket, arranging connecting rods at the respective constraint points,
the connecting rods are fixedly arranged on the steel rods (3) in a space-symmetrical mode.
5. A removable down-balance bed load sand transport rate measuring device according to claim 3, wherein: the detachability of the steel rod is established in a screw-on manner.
6. A removable down-balance bed load sand transport rate measuring device according to claim 1, wherein: the steel pole is solid screw-thread steel pole, the cross-section of solid screw-thread steel pole is circular.
7. The removable down-balance bed load sand transport rate measuring device according to claim 6, wherein: the radius of the circle is 5-7 mm.
8. A removable down-balance bed load sand transport rate measuring device according to claim 2, wherein: the sand guide plate is inclined upwards at an angle of 45 degrees with the horizontal plane, and the length of the sand guide plate is 1 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121389171.XU CN214952075U (en) | 2021-06-22 | 2021-06-22 | Detachable lower scale type bed load sand conveying rate measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121389171.XU CN214952075U (en) | 2021-06-22 | 2021-06-22 | Detachable lower scale type bed load sand conveying rate measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN214952075U true CN214952075U (en) | 2021-11-30 |
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| CN202121389171.XU Active CN214952075U (en) | 2021-06-22 | 2021-06-22 | Detachable lower scale type bed load sand conveying rate measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115839909A (en) * | 2022-12-06 | 2023-03-24 | 广东省水利水电科学研究院 | Water flow sediment measuring device and method |
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2021
- 2021-06-22 CN CN202121389171.XU patent/CN214952075U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115839909A (en) * | 2022-12-06 | 2023-03-24 | 广东省水利水电科学研究院 | Water flow sediment measuring device and method |
| CN115839909B (en) * | 2022-12-06 | 2023-08-25 | 广东省水利水电科学研究院 | Device and method for measuring sediment in water flow |
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