Self-cleaning ditch flow detection device

Abstract

The utility model discloses a self-cleaning type ditch flow detection device which is provided with a flow velocity sensor located in an open channel and a portal located above the open channel, the flow velocity sensor is connected with the portal through a pulley mechanism, the pulley mechanism comprises a driving pulley installed on the portal and a driven pulley connected through a sliding rope, and the driving pulley is connected with the driven pulley through a sliding rope. The driven pulley is installed at the bottom of the open channel through a sand discharging mechanism, the sand discharging mechanism comprises an installation groove excavated in the bottom of the open channel and a base arranged in the installation groove, wall plates are arranged on the periphery of the base and attached to the four walls of the installation groove, a water inlet hole is formed in the wall plate on the upstream side of the base, and a water outlet hole is formed in the wall plate on the downstream side of the base. According to the utility model, the accuracy and precision of the flow velocity detection result can be improved, the problem that the detection work cannot be carried out due to adhesion and accumulation of water flow, silt, foreign matters and the like is solved, the work of the detection device is ensured, the operation and maintenance investment is saved, and accurate hydrological information data support is efficiently provided at any time.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, specifically to a self-cleaning ditch flow detection device. Background Technology

[0002] An open channel is a channel with a free surface (where water flows at each point on the surface under atmospheric pressure). Based on its formation, it can be divided into natural open channels and artificial open channels. The former includes natural rivers; the latter includes artificial water conveyance channels, canals, and pipes that are not yet filled with water.

[0003] To improve open channel water resource management, help formulate reasonable water resource allocation plans, and ensure the rational use and protection of water resources, it is necessary to obtain accurate hydrological information such as flow velocity and water level.

[0004] Existing pull-wire open channel flow velocity detection devices use a gantry frame installed above the open channel, connected to a pulley mechanism, with a flow sensor mounted on a pull rope for measurement. Replacing the fixed support with a cable reduces flow obstruction and significantly eliminates interference from the detection mechanism, thus improving the accuracy of open channel flow detection. However, because the driven pulley of the pulley mechanism is placed at the bottom of the open channel, it is prone to malfunction due to sediment accumulation, affecting its performance and lifespan. Furthermore, the pulley's placement in the middle of the open channel for measurement significantly impacts the flow velocity, leading to errors in the detection data. Summary of the Invention

[0005] The purpose of this invention is to provide a self-cleaning ditch flow detection device that can eliminate interference with water flow, improve the detection accuracy and precision of the flow meter, eliminate the influence of sediment in the water flow on the normal operation of the driven pulley, and ensure the operation of the entire structural system.

[0006] The self-cleaning ditch flow detection device is equipped with a gantry located above the open ditch. Two supports of the gantry are respectively installed on the ground on both sides of the open ditch, and telescopic support rods are installed inside the supports. An electrical control box is installed on one of the supports. A crossbar is fixed at the top of the two supports. The crossbar is also equipped with a drive pulley and a motor in the pulley mechanism. The motor is connected to the drive pulley through a rotating shaft, and the drive pulley, driven pulley and motor face the liquid surface of the open ditch.

[0007] The active pulley is coaxially mounted with an active gear, which meshes with the driven pulley. A flow rate processor is installed on the side wall of the driven pulley, and its signal end is connected to a signal line. The key point is that a flow rate sensor is installed in the open channel, and the flow rate sensor is connected to the gantry through the pulley mechanism.

[0008] The gantry is equipped with a lifting mechanism for lifting the pulley mechanism;

[0009] The pulley mechanism includes an active pulley mounted on the gantry and a driven pulley connected by a sliding rope, the driven pulley being installed at the bottom of the open channel via a sand-discharging mechanism;

[0010] The sand-discharging mechanism includes an installation trench excavated at the bottom of the open channel and a base arranged in the installation trench. The base is surrounded by wall panels that are attached to the four walls of the installation trench. The wall panels on the water-facing side have water inlet holes, and the wall panels on the water-repellent side have water outlet holes.

[0011] The bottom of the sand discharge mechanism has a concave-convex contact with the bottom of the installation trough. The protruding part supports the sand discharge mechanism, while the convex part is used to accommodate excess silt. Regularly lifting the sand discharge mechanism avoids long-term silt accumulation on the driven pulley, effectively solving the problem of silt interference with the driven pulley's operation, reducing the workload of manual dredging, and ensuring the accuracy and precision of measurements. The gantry is set above the open channel. When too much silt accumulates in the convex part, manual cleaning is then carried out, avoiding long-term impact and corrosion of the gantry by water and slowing down the aging rate of the gantry.

[0012] Furthermore, the lifting mechanism is a telescopic support rod installed on two pillars of the gantry. The telescopic support rod is a telescopic rod with a screw and nut structure. A crossbar is directly fixed to the two pillars. The active pulley motor is installed on the crossbar. The motor is connected to the active pulley through a rotating shaft.

[0013] A driven wheel is provided on the gantry and rotates synchronously with the driving pulley. A driving gear is coaxially mounted on the driving pulley and meshes with the driven wheel. A flow rate processor is installed on the side wall of the driven wheel, and a signal line is connected to its signal end. The signal line is in the opposite direction to the winding direction of the sliding rope, passes around the driven wheel, and is connected to the flow rate sensor.

[0014] The driving gear meshes with the driven gear, achieving the effect of synchronous rotation of the driving pulley and the driven pulley;

[0015] Alternatively, the driving pulley and the driven pulley can be installed coaxially, but the distance between them must be increased to avoid the signal line and the sliding rope from getting tangled together and affecting the operation of the measurement work;

[0016] The flow rate processor follows the rotation of the active pulley, enabling reliable extension and retraction of the signal line and protecting the signal line.

[0017] Furthermore, when the telescopic support rod extends, it controls the driven pulley to rise, and when it retracts, it controls the driven pulley to fall.

[0018] The driven pulley is fixed to the upper bottom of the base, and a counterweight is provided on the lower bottom of the base;

[0019] The telescopic support rod controls the pulley mechanism to descend, causing the driven pulley to fall under its own weight. Combined with the counterweight, the driven pulley returns to its original position.

[0020] During the upward or downward movement of the pulley mechanism controlled by the telescopic support rods inside the two pillars, the mud, sand, or foreign objects attached to the driven pulley can be impacted by the water flow to achieve a cleaning effect. During the downward movement of the pulley mechanism, the driven pulley can be lowered and restored to its initial working position by its own weight combined with the counterweight.

[0021] Furthermore, a ridge is provided in the middle of the bottom surface of the base, and the ridge surface is a sloping surface. The high end of the sloping surface is connected to the wall panel on the water-facing side, and the low end of the sloping surface is connected to the wall panel on the back side.

[0022] The driven pulley is fixed to the spine surface and is lower than the upper edge of the wall panel.

[0023] The base is placed at a certain angle, which makes it easier for mud and sand in the water to flow out along the slope and prevents mud and sand from accumulating, thus ensuring the operation of the driven pulley.

[0024] Furthermore, at least one of the water inlets has its bottom flush with the top of the slope surface;

[0025] At least one of the water outlet holes has its bottom surface flush with the top surface of the base on both sides of the slope.

[0026] The aforementioned inlet and outlet holes are necessary openings. When the mud and sand in the water flow through, they enter the inlet hole through the impact of the water, flow along the high end of the slope on the bottom surface of the base, and then flow out from the outlet hole along the slope, effectively reducing the deposition of most of the mud and sand in the installation groove.

[0027] Furthermore, the bottom of at least one of the water inlet holes on the water-facing side is flush with the bottom surface of the base on both sides of the high end of the slope.

[0028] The bottom of at least one of the water outlet holes is flush with the bottom of the slope surface on the back side.

[0029] The water inlet and water outlet mentioned in this section are optional openings; they may or may not be made.

[0030] Furthermore, the driven pulley is higher than the height of all the water outlet holes.

[0031] The installation height of the driven pulley further ensures that the operation of the driven pulley will not be affected when mud and sand flow through it.

[0032] Furthermore, a mounting plate is fixed on the flow velocity sensor, with an upper mounting lug and a lower mounting lug installed at one end of the mounting plate, and a sliding rope through hole at the other end of the mounting plate;

[0033] One end of the sliding rope is connected to the upper mounting lug. After the sliding rope passes around the movable pulley, it passes through the sliding rope through-hole, then around the driven pulley. The other end of the sliding rope is connected to the lower mounting lug.

[0034] The mounting plate fixes the working direction of the flow velocity sensor, preventing it from deflecting arbitrarily. By controlling the rotation of the active pulley, the flow velocity sensor can rotate with the active pulley, allowing flow velocity detection at any height below the water level, thus satisfying the flow velocity measurement requirements under any water level conditions.

[0035] Furthermore, among the wall panels around the perimeter of the wall panel, the water-facing side and the water-repellent side are vertical panels, while the other two sides are sloping panels, with the angle between the sloping panels and the bottom surface of the base being an obtuse angle.

[0036] The sloping design facilitates the return of the sand-discharging mechanism to the installation slot.

[0037] Furthermore, a liquid level detection pool connected to the open channel is provided next to the open channel, and a liquid level sensor is installed in the liquid level detection pool.

[0038] The relatively stable water volume and small fluctuations in the liquid level monitoring pool facilitate stable data collection for water level monitoring.

[0039] Beneficial effects: The gantry is installed above the open channel, avoiding long-term impact and corrosion from water. The key feature is the sand removal mechanism, which eliminates the impact of water flow and sediment deposition, achieving a self-cleaning effect. This allows the driven pulley device to be used freely and normally at any time, ensuring the operation of the detection device and saving on maintenance costs. Attached Figure Description

[0040] Figure 1 Layout diagram of the ditch flow detection device;

[0041] Figure 2 This is a schematic diagram of a self-cleaning ditch flow detection device.

[0042] Figure 3 This is a structural diagram of the backwater side of the base;

[0043] Figure 4 This is a schematic diagram of the sand removal mechanism. Detailed Implementation

[0044] The specific embodiments and working principles of this utility model will be further described in detail below with reference to the accompanying drawings.

[0045] A self-cleaning ditch flow detection device is provided with a gantry 2 located above an open ditch 1. Two support columns 21 of the gantry 2 are respectively installed on the ground on both sides of the open ditch 1. Telescopic support rods are provided inside the support columns 21. An electrical control box 4 is installed on one of the support columns 21.

[0046] Two support pillars 21 are fixed with a crossbar 22 at the top. The crossbar 22 is also equipped with an active pulley 61 and a motor 7 in the pulley mechanism 6. The motor 7 is connected to the active pulley 61 through a rotating shaft 71, and the active pulley 61 and the motor 7 face the liquid surface of the open channel 1.

[0047] The active pulley 61 is coaxially mounted with an active gear, which meshes with the driven pulley. The driven pulley has a flow rate processor installed on its side wall, and its signal end is connected to a signal line.

[0048] A flow velocity sensor 8 is installed in the open channel 1 and a mounting plate is fixed on it. One end of the mounting plate is equipped with an upper mounting lug and a lower mounting lug, and the other end of the mounting plate has a sliding rope passage hole.

[0049] One end of the sliding rope 66 is connected to the upper mounting lug. After passing around the movable pulley 61, the sliding rope 66 passes through the sliding rope through hole and then around the driven pulley 65. The other end of the sliding rope 66 is connected to the lower mounting lug.

[0050] The signal line of the flow rate processor is wound in the opposite direction to the sliding rope 66, passes around the driven wheel, and is connected to the flow rate sensor 8.

[0051] The bottom of the open channel 1 is excavated with an installation groove 11 and a base 9 arranged in the installation groove 11. The base 9 is surrounded by wall panels 12 that are attached to the four walls of the installation groove 11. The wall panel 12 on the water-facing side has a water inlet hole 12a and the wall panel 12 on the water-repellent side has a water outlet hole 12b. The center of the driven pulley 65 and the center of the driving pulley 61 are on the same straight line.

[0052] The bottom of the open channel 1 has an installation groove 11 and a base 9 arranged in the installation groove 11. The base 9 is surrounded by wall panels 12 that are attached to the four walls of the installation groove 11. The bottom of the base 9 has a counterweight 9a.

[0053] The base 9 has a ridge-fixed driven pulley 65 in the middle of its bottom surface, and the driven pulley 65 is lower than the wall panel 12. The ridge surface is a sloping surface. The high end of the sloping surface is connected to the lower edge of the wall panel 12 on the water-facing side, and the low end of the sloping surface is connected to the lower edge of the wall panel 12 on the back water-facing side. The water-facing side and the back water-facing side of the wall panel 12 are vertical plates, and the other two sides are inclined plates. The angle between the inclined plates and the bottom surface of the base 9 is an obtuse angle.

[0054] On the water-facing side, the bottom of at least one of the water inlet holes 12a is flush with the top of the slope surface; on the back side, the bottom of at least one of the water outlet holes 12b is flush with the top surface of the base 9 on both sides of the slope surface.

[0055] The telescopic rods inside the two support columns 21 of the gantry 2 can lift the driven pulley 65 in the extended state, and similarly, they can lower the driven pulley 65 to the bottom of the open channel 1 in the retracted state. By the weight of the driven pulley 65 itself and the limitation of the mounting groove 11, combined with the counterweight 9a, the driven pulley 65 returns to the initial detection working position.

[0056] A liquid level detection pool 3 connected to the open channel 1 is also provided next to the open channel 1, and a liquid level sensor 31 is installed in the liquid level detection pool 3.

Claims

1. A self-cleaning ditch flow detection device, provided with a portal (2) above the open channel (1), two supports (21) of the portal (2) are respectively installed on the ground on both sides of the open channel (1), a telescopic support rod is arranged in the support (21); one of the supports (21) is provided with an electric control box (4); the top of the two supports (21) is fixed with a crossbar (22), the crossbar (22) is further provided with a driving pulley (61) and a motor (7) in a pulley mechanism (6), the motor (7) is connected with the driving pulley (61) through a rotating shaft (71), and the driving pulley (61), a driven pulley (65) and the motor (7) are all directed to the liquid surface of the open channel (1); a flow rate sensor (8) is arranged in the open channel (1), the flow rate sensor (8) is connected with the portal (2) through the pulley mechanism (6); the portal (2) is provided with a lifting mechanism for lifting the pulley mechanism (6); the pulley mechanism (6) comprises the driving pulley (61) installed on the portal (2) and the driven pulley (65) connected through a sliding rope (66), the driven pulley (65) is installed at the bottom of the open channel (1) through a sand discharging mechanism; the sand discharging mechanism comprises a mounting groove (11) excavated at the bottom of the open channel (1) and a base (9) arranged in the mounting groove (11), wall plates (12) are arranged around the base (9) and attached to the four walls of the mounting groove (11), water inlet holes (12a) are formed in the wall plates (12) on the water side, and water outlet holes (12b) are formed in the wall plates (12) on the backwater side; the lifting mechanism is a telescopic support rod arranged on the two supports (21) of the portal (2), the telescopic support rod is a telescopic rod in a screw nut structure, the top of the two supports (21) is fixed with the crossbar (22), the crossbar (22) is provided with the driving pulley (61) and the motor (7), and the motor (7) is connected with the driving pulley (61) through the rotating shaft (71); the driven pulley (65) is fixed on the upper bottom of the base (9), and the lower bottom of the base (9) is provided with a counterweight (9a); the middle part of the upper top surface of the base (9) is provided with a back ridge, the back ridge surface of the back ridge is a slope surface, the high end of the slope surface is connected with the wall plate (12) on the water side, and the low end of the slope surface is connected with the wall plate (12) on the backwater side; the driven pulley (65) is fixed on the back ridge surface and is lower than the upper edge of the wall plate (12); the lower bottom of at least one of the water inlet holes (12a) is flush with the high end of the slope surface; the lower bottom of at least one of the water outlet holes (12b) is flush with the upper top surface of the base (9) on both sides of the slope surface; the lower bottom of at least one of the water inlet holes (12a) on the water side is flush with the upper top surface of the base (9) on both sides of the high end of the slope surface; the lower bottom of at least one of the water outlet holes (12b) on the backwater side is flush with the low end of the slope surface; the driven pulley (65) is higher than the height of all the water outlet holes (12b). The driving pulley (61) is coaxially installed with a driving gear, the driving gear is engaged with a driven gear, and the side wall of the driven gear is installed with a flow rate processor, a signal line is connected to the signal end of the flow rate processor, characterized in that: ​ ​ ​ ​ 2. The self-cleaning gutter flow detection device of claim 1, wherein: ​ 3. The self-cleaning gutter flow detection device of claim 2, wherein: ​ 4. The self-cleaning gutter flow detection device of claim 3, wherein: ​ ​ 5. The self-cleaning gutter flow detection device of claim 4, wherein: ​ ​ 6. The self-cleaning gutter flow detection device of claim 5, wherein: ​ ​ 7. The self-cleaning gutter flow detection device according to claim 5 or 6, wherein: ​ 8. The self-cleaning gutter flow detection device of claim 1, wherein: The flow rate sensor (8) is fixed with a mounting plate, one end of which is provided with upper and lower mounting lugs, and the other end of which is provided with a sliding rope through hole; One end of the sliding rope (66) is connected with the upper mounting lug, the sliding rope (66) passes through the sliding rope through hole after winding around the driven pulley (65), and the other end of the sliding rope (66) is connected with the lower mounting lug.

9. The self-cleaning gutter flow detection device of claim 1, wherein: The wall plates (12) on the water-approaching side and the water-backing side are vertical plates, and the wall plates (12) on the other two sides are inclined plates, the included angle between the inclined plates and the bottom surface of the base (9) being obtuse.

10. The self-cleaning gutter flow detection device of claim 1, wherein: The open channel (1) is provided with a liquid level detection tank (3) communicated with the open channel (1), and the liquid level detection tank (3) is provided with a liquid level sensor (31).

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