A self-propelled traction Doppler flow measuring device with self-locking

Abstract

The present invention relates to a self-propelled traction type Doppler flow measuring device with self-locking function, which solves the problem that the existing hydrological bridge measuring equipment is impacted by the water flow in an unknown manner, has a large impact on the steel cable retracting and releasing drum, and has potential safety hazards. The device includes a bridge built between the two banks of the river, and is characterized in that: a flow measuring track is arranged on the side of the bridge, a self-propelled vehicle is arranged on the flow measuring track, a travel motor driving the self-propelled vehicle to travel along the flow measuring track is arranged at the front end of the self-propelled vehicle, a winch for retracting and releasing the steel cable, a pulley block for guiding the steel cable, and a self-locking mechanism for the steel cable are arranged at the rear end of the self-propelled vehicle, and a support frame for erecting the pulley block and the self-locking mechanism is also arranged at the rear end of the self-propelled vehicle; a flow measuring boat is suspended at the lower end of the steel cable, and a Doppler device is installed on the flow measuring boat. The present invention automatically locks the length of the steel cable after the flow measuring boat is lowered into the water surface, thereby preventing the steel cable from derailing, and also avoiding the excessive impact of the water flow on the steel cable and the winch, thereby eliminating potential safety hazards.

Description

Technical Field

[0001] The invention relates to a hydrological flow measuring device, in particular to a self-propelled traction type Doppler flow measuring device with self-locking function. Background Art

[0002] In the field of hydrological flow measurement, there are fixed-point flow measurement and mobile flow measurement for river flow measurement. Fixed-point flow measurement generally relies on fixed buildings built at key nodes of the hydrological network. Based on fixed buildings, hydrological cableways or Doppler flow measurement platforms across the river are built. Taking hydrological cableways as an example, the construction cost of hydrological cableways is high and will have a certain impact on the waterway. It is not suitable for large-scale construction. Mobile flow measurement is generally carried out in the flood season. It is necessary to measure hydrological information at as many points as possible to obtain detailed flow information, which plays an important role in development planning and disaster prevention around the water network. Mobile flow measurement generally uses a mobile flow measurement vehicle, which uses the equipment on the vehicle to measure the flow.

[0003] With the development of infrastructure construction in my country, more and more bridge facilities have been built on rivers, which has brought convenience to mobile hydrological flow measurement. The mobile flow measurement vehicle moves along the bridge, and the flow measurement device is suspended to the water surface through a steel cable, and the flow measurement device is dragged while walking to perform flow measurement. For example, the Chinese patent with announcement number CN203534593U, announced on April 9, 2014, is called a portable multifunctional hydrological bridge measurement vehicle. The device includes a base with rollers, and a vertical main rod and a secondary rod are arranged on the front and back of the base. A cantilever is arranged at the top of the main rod and the secondary rod. The front end of the cantilever extends forward over the main rod, and pulleys are respectively arranged at the front and rear ends of the cantilever. A suspension cable is wound around the two pulleys. The front end of the suspension cable is suspended from the pulley at the front end of the cantilever and a lead fish for flow measurement is suspended thereon. The rear end of the suspension cable is suspended from the pulley at the rear end of the cantilever and wound on a reel, and the reel is fixedly arranged on the secondary rod. The device uses a cantilever structure to lower the flow measuring lead fish into the water, and then pushes the hydrological bridge measuring vehicle to move along the bridge to measure the flow.

[0004] The above-mentioned devices have the following defects: 1. The existing flow measuring equipment measures the relative flow velocity of the water flow and the flow measuring device. When the flow measuring device is stationary, the flow measurement result is accurate, but when the flow measuring device moves, the flow measurement result is a combination of the water flow velocity and the moving speed of the flow measuring device. When the water flow velocity is small, the moving speed of the flow measuring device has a particularly obvious impact on the flow measurement result. At this time, the moving speed of the flow measuring device should be slowed down as much as possible to reduce the impact on the flow measurement data. However, when the water flow velocity is unknown, the existing flow measuring device cannot determine the appropriate moving speed, and whether the bridge measuring vehicle is driven by a car or driven by manpower, the moving speed cannot be stable, and the impact cannot be eliminated in the subsequent data correction. 2. When the water flow velocity is large, it will produce a downstream impact force on the flow measuring device suspended in the water, causing the steel cable to tilt. When the flow measuring device is a floating hull, this impact is particularly obvious, and the impact force on the retractable drum of the steel cable is very large, posing a safety hazard. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing hydrological bridge measuring equipment is impacted by water flow in an unknown manner, has a large impact on the steel cable retracting and releasing drum, and has potential safety hazards, and to provide a self-propelled traction Doppler flow measuring device with self-locking. At the same time, the present invention also solves the problem that the self-propelled speed of the Doppler flow measuring device is controlled based on the water flow velocity, and minimizes the influence of the flow measuring device's walking speed on the water flow velocity measurement. At the same time, the self-propelled speed curve of the flow measuring device is controllable and recordable, and can be eliminated in subsequent data processing.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a self-propelled traction type Doppler flow measuring device with self-locking, including a bridge built between the two banks of a river channel, characterized in that: a flow measuring track is arranged on the side of the bridge, a self-propelled vehicle is arranged on the flow measuring track, a travel motor for driving the self-propelled vehicle to travel along the flow measuring track is arranged at the front end of the self-propelled vehicle, a winch for retracting and releasing a steel cable, a pulley block for guiding the steel cable and a self-locking mechanism of the steel cable are arranged at the rear end of the self-propelled vehicle, and a supporting frame for erecting the pulley block and the self-locking mechanism is also arranged at the rear end of the self-propelled vehicle; a flow measuring boat is suspended at the lower end of the steel cable, and a Doppler device is installed on the flow measuring boat.

[0007] This device sets a flow measurement track on the side of the bridge across the river, with the extension direction of the track as the front-to-back direction. The self-propelled vehicle can be permanently installed on the flow measurement track, or it can be portable and motorized. When the flow measurement is needed, the self-propelled vehicle is installed on the flow measurement track, the steel cable is unwound from the winch, passed through the pulley block in sequence, and then fixed to the flow measurement boat, and the flow measurement boat is lowered to the water surface. When the flow measurement boat is lowered to the water surface, the gravity is balanced by the buoyancy of the water surface, the tension on the steel cable is reduced, and the self-locking device forms a self-locking. At this time, the walking motor drives the self-propelled vehicle to move along the flow measurement track, dragging the flow measurement boat to measure the flow at various locations in the river section.

[0008] Preferably, the self-locking mechanism includes a floating bracket, which is an inverted triangle bracket. The two side arms of the floating bracket are elastic arms arranged obliquely, and wedges are provided at the bottom ends of the two side arms of the floating bracket, and conical holes are provided on the bottom plate of the self-propelled vehicle corresponding to the wedges; a floating pulley is provided below the top cross bar of the floating bracket, a guide rod is provided upward on the top cross bar of the floating bracket, and a guide sleeve is provided corresponding to the support frame and the guide rod, and a tightening spring is provided between the top cross bar of the floating bracket and the support frame; a first fixed pulley and a second fixed pulley are symmetrically provided on the left and right support frames of the floating bracket, and a third fixed pulley is provided above the wedge of the floating bracket, and after being output from the winch, the steel cable is successively wound around the top of the first fixed pulley, the bottom of the floating pulley, and the top of the second fixed pulley, and then bypasses the third fixed pulley and passes between the two wedges to hang the current measuring boat downward. The self-locking device is realized by locking the wedge block and the tapered hole of the floating bracket. When the steel cable is in a loose state, the upward lifting force on the floating pulley is insufficient. At this time, the floating bracket is tightened downward under the action of the tightening spring, and the wedge block is locked with the tapered hole, so that the steel cable cannot pass through the wedge block and pull downward; when the steel cable is in a taut state, it has sufficient upward lifting force on the floating pulley, and the floating bracket can be lifted upward, so that the wedge block and the tapered hole are separated, and the steel cable can be unwound downward. Based on the above self-locking method, when the current measuring ship is being lowered, the current measuring ship and the equipment on board have sufficient gravity to tighten the steel cable, the floating bracket floats up to release the lock, and the steel cable can be smoothly unwound downward. When the current measuring ship goes down to the water surface and is subject to the buoyancy of the water surface, the tension of the steel cable is insufficient, the steel cable is in a loose state, and the floating bracket sinks to achieve locking. When the current measuring boat is recovered, the winch is wound to tighten the steel cable, and the floating bracket can be lifted up to unlock it, so that the current measuring boat can be lifted smoothly. When the current measuring boat is removed from the lower end of the steel cable, the self-locking device is self-locking, and the end of the steel cable can be fixed. When the current measuring boat is hung on the steel cable again, the steel cable can be tightened by rewinding the winch in the initial state, and the floating bracket can be lifted to unlock it. The self-locking structure of this device can ensure that the steel cable automatically locks its length after the current measuring boat is lowered to the water surface, avoiding the impact of water flow that causes the current measuring boat to deviate downstream, causing the steel cable to be at an excessively large inclination and derail, and also avoiding the impact of water flow that causes excessive impact on the steel cable and winch, ensuring safe production.

[0009] Preferably, the third fixed pulley is mounted on the bottom plate of the self-propelled vehicle.

[0010] Preferably, the floating pulley is centrally arranged below the top cross bar of the floating support, and the guide rod is centrally arranged above the top cross bar of the floating support.

[0011] Preferably, the top cross bar of the floating bracket is extended in the front-rear direction. The top cross bar of the floating bracket extends front-rear, and the first fixed pulley and the second fixed pulley are arranged on the left and right sides of the floating bracket, and the two are arranged crosswise for convenience.

[0012] Preferably, the opposite sides of the two wedge blocks are provided with semicircular grooves adapted to the steel cables, and anti-slip grooves are provided in the semicircular grooves.

[0013] Preferably, a steering pulley for turning the steel cable 90 degrees is provided between the winch and the first fixed pulley, and between the second fixed pulley and the third fixed pulley.

[0014] Preferably, the self-propelled vehicle is provided with an anti-slip pulley block for clamping the steel cable from the left and right sides below the tapered hole. The anti-slip pulley block guides the steel cable to prevent the steel cable from getting stuck in the tapered hole and also prevents the steel cable from derailing due to water flow impact.

[0015] Preferably, guide grooves are provided on both sides of the flow measuring track toward the left and right sides, and anti-slip rollers which are inserted into the guide grooves are provided on both sides of the bottom of the traveling vehicle.

[0016] Preferably, the travel motor is provided with a multi-speed controller, and the Doppler device is connected to the speed controller via a wireless signal. After the travel motor obtains the water flow velocity of the Doppler device, the travel speed of the self-propelled vehicle is controlled to be no more than 30% of the water flow velocity, and the self-propelled vehicle movement speed curve is recorded in real time. The speed of the travel motor of the device is determined by the water flow velocity, which reduces the relative speed of the Doppler flow measurement device to account for too large a proportion in the measured water flow velocity, resulting in inaccurate flow measurement results. At the same time, the device can keep the self-propelled vehicle's movement speed stable, controllable and fully recorded through the speed controller, which is convenient for eliminating the relative speed of the Doppler flow measurement device in subsequent data processing.

[0017] The present invention uses a self-locking device to automatically lock the length of the steel cable after the current measuring boat is lowered into the water surface, thereby preventing the current measuring boat from continuously shifting downstream due to the impact of the water flow, causing the steel cable to derail. At the same time, it also prevents the excessive impact force of the water flow from acting on the steel cable and the winch, eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 The present invention is a schematic diagram of a steel cable reeling and unreeling structure at the rear end of a self-propelled vehicle.

[0020] Figure 3 It is a structural schematic diagram of a floating support with a self-locking mechanism according to the present invention.

[0021] In the figure: 1, bridge, 2, flow measuring track, 3, self-propelled vehicle, 4, travel motor, 5, winch, 6, steel cable, 7, flow measuring boat, 8, Doppler device, 9, river channel, 10, guide groove, 11, anti-slip roller, 12, supporting frame, 13, steering pulley, 14, first fixed pulley, 15, second fixed pulley, 16, third fixed pulley, 17, floating pulley, 18, floating bracket, 19, tightening spring, 20, guide rod, 21, wedge block, 22, guide sleeve, 23, tapered hole, 24, anti-slip pulley block, 25, elastic arm. DETAILED DESCRIPTION

[0022] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0023] Embodiment: A self-propelled traction Doppler flow measuring device with self-locking, such as Figure 1 As shown. The device is arranged on a bridge 1 between the two banks of a river channel 9, and a flow measuring track 2 is arranged on the side of the bridge 1, and a self-propelled vehicle 3 is arranged on the flow measuring track 2. A travel motor 4 for driving the self-propelled vehicle to travel along the flow measuring track is arranged at the front end of the self-propelled vehicle, and a winch 5 for retracting and releasing the steel cable, a pulley block for guiding the steel cable, and a self-locking mechanism for the steel cable 6 are arranged at the rear end of the self-propelled vehicle. A support frame 12 for erecting the pulley block and the self-locking mechanism is also arranged at the rear end of the self-propelled vehicle; a flow measuring boat 7 is suspended at the lower end of the steel cable 6, and a Doppler device 8 is installed on the flow measuring boat. Guide grooves 10 are opened on both sides of the flow measuring track 2 towards the left and right sides, and anti-slip rollers 11 that are stuck in the guide grooves are arranged on both sides of the bottom of the traveling vehicle.

[0024] like Figure 2 , 3 As shown, the self-locking mechanism includes a floating bracket 18, which is an inverted triangle bracket. The two side arms of the floating bracket 18 are elastic arms 25 arranged obliquely. The bottom ends of the two side arms of the floating bracket are provided with wedges 21. The bottom plate of the self-propelled vehicle is provided with tapered holes 23 corresponding to the wedges. The opposite sides of the two wedges 21 are provided with semicircular grooves adapted to the steel cable 6, and anti-slip grooves are provided in the semicircular grooves. A floating pulley 17 is provided below the top crossbar of the floating bracket 18, a guide rod 20 is provided upwardly on the top crossbar of the floating bracket, and a guide sleeve 22 is provided correspondingly to the support frame and the guide rod. A tightening spring 19 is provided between the top crossbar of the floating bracket and the support frame 12; the floating pulley 17 is centrally arranged below the top crossbar of the floating bracket 18, and the guide rod 20 is centrally arranged above the top crossbar of the floating bracket. The top crossbar of the floating bracket is extended in the front-back direction.

[0025] The first and second fixed pulleys are symmetrically arranged on the left and right support frames of the floating bracket, and the third fixed pulley is arranged above the wedge block of the floating bracket. After the steel cable is output from the winch, it is turned 90 degrees by the steering pulley 13, and then it is successively wound from above the first fixed pulley 14, below the floating pulley 17, and above the second fixed pulley 15, and then it is turned 90 degrees by the steering pulley, and then it bypasses the third fixed pulley 16 and passes downward between the two wedge blocks 21 to hang the current measuring boat 7 downward. The self-propelled vehicle 3 is provided with an anti-slip pulley group 24 for clamping the steel cable from the left and right sides below the tapered hole 23.

[0026] The self-locking device is realized by locking the wedge block of the floating bracket and the tapered hole on the self-propelled vehicle. When the steel cable is in a loose state, the upward lifting force on the floating pulley is insufficient. At this time, the floating bracket is tightened downward under the action of the tightening spring, and the wedge block is locked with the tapered hole, so that the steel cable cannot pass through the wedge block and pull downward; when the steel cable is in a taut state, it has sufficient upward lifting force on the floating pulley, which can lift the floating bracket upward, disengage the wedge block and the tapered hole, and the steel cable can be unwound downward. Based on the above self-locking method, when the current measuring ship is being lowered, the current measuring ship and the equipment on board have sufficient gravity to tighten the steel cable, the floating bracket floats up to release the lock, and the steel cable can be smoothly unwound downward. When the current measuring ship goes down to the water surface and is subject to the buoyancy of the water surface, the tension of the steel cable is insufficient, the steel cable is in a loose state, and the floating bracket sinks to achieve locking. When the current measuring boat is recovered, the winch is wound to tighten the steel cable, and the floating bracket can be lifted up to unlock it, so that the current measuring boat can be lifted smoothly. When the current measuring boat is removed from the lower end of the steel cable, the self-locking device is self-locking, and the end of the steel cable can be fixed. When the current measuring boat is hung on the steel cable again, the steel cable can be tightened by rewinding the winch in the initial state, and the floating bracket can be lifted to unlock it. The self-locking structure of this device can ensure that the steel cable automatically locks its length after the current measuring boat is lowered to the water surface, avoiding the impact of water flow that causes the current measuring boat to deviate downstream, causing the steel cable to be at an excessively large inclination and derail, and also avoiding the impact of water flow that causes excessive impact on the steel cable and winch, ensuring safe production.

Claims

1. A self-propelled, towed Doppler flow measuring device with self-locking, comprising a bridge between two banks of a river, characterized in that: A flow measuring track is arranged on the side of the bridge, a self-propelled vehicle is arranged on the flow measuring track, a travel motor is arranged at the front end of the self-propelled vehicle to drive the self-propelled vehicle to travel along the flow measuring track, a winch for retracting and releasing a steel cable, a pulley block for guiding the steel cable and a self-locking mechanism of the steel cable are arranged at the rear end of the self-propelled vehicle, and a support frame for erecting the pulley block and the self-locking mechanism is also arranged at the rear end of the self-propelled vehicle; a flow measuring boat is suspended at the lower end of the steel cable, and a Doppler device is installed on the flow measuring boat; The self-locking mechanism includes a floating bracket, which is an inverted triangular bracket. The two side arms of the floating bracket are elastic arms arranged obliquely. Wedge blocks are arranged at the bottom ends of the two side arms of the floating bracket, and tapered holes are arranged on the bottom plate of the self-propelled vehicle corresponding to the wedge blocks; a floating pulley is arranged below the top cross bar of the floating bracket, a guide rod is arranged upward on the top cross bar of the floating bracket, and a guide sleeve is arranged corresponding to the support frame and the guide rod, and a tightening spring is arranged between the top cross bar of the floating bracket and the support frame; a first fixed pulley and a second fixed pulley are symmetrically arranged on the left and right support frames of the floating bracket, and a third fixed pulley is arranged above the wedge block of the floating bracket. After the steel cable is output from the winch, it is successively wound around the top of the first fixed pulley, the bottom of the floating pulley, and the top of the second fixed pulley, and then bypasses the third fixed pulley and passes between the two wedge blocks to hang the current measuring boat downward.

2. A self-propelled, towed Doppler flow measuring device with self-locking function according to claim 1, characterized in that: The third fixed pulley is installed on the bottom plate of the self-propelled vehicle.

3. A self-propelled traction Doppler flow measuring device with self-locking function according to claim 1, characterized in that: The floating pulley is centrally arranged below the top cross bar of the floating support, and the guide rod is centrally arranged above the top cross bar of the floating support.

4. A self-propelled, towed Doppler flow measuring device with self-locking function according to claim 1, 2 or 3, characterized in that: The top cross bar of the floating bracket is extended along the front-rear direction.

5. A self-propelled, towed Doppler flow measuring device with self-locking function according to claim 1, 2 or 3, characterized in that: Semicircular grooves adapted to the steel cables are arranged on opposite sides of the two wedge blocks, and anti-slip grooves are arranged in the semicircular grooves.

6. A self-propelled traction Doppler flow measuring device with self-locking function according to claim 1, 2 or 3, characterized in that: A steering pulley for turning the steel cable 90 degrees is arranged between the winch and the first fixed pulley, and between the second fixed pulley and the third fixed pulley.

7. A self-propelled, towed Doppler flow measuring device with self-locking function according to claim 1, 2 or 3, characterized in that: The self-propelled vehicle is provided with an anti-slip pulley block for clamping the steel cable from left and right sides below the tapered hole.

8. A self-propelled, towed Doppler flow measuring device with self-locking function according to claim 1, 2 or 3, characterized in that: Guide grooves are provided on both sides of the flow measuring track toward the left and right sides, and anti-slip rollers which are inserted into the guide grooves are arranged on both sides of the bottom of the self-propelled vehicle.

9. A self-propelled, towed Doppler flow measuring device with self-locking function according to claim 1, 2 or 3, characterized in that: The travel motor is provided with a multi-speed controller, and the Doppler device is connected to the speed controller via a wireless signal. After the travel motor obtains the water flow velocity from the Doppler device, the travel speed of the self-propelled vehicle is controlled to not exceed 30% of the water flow velocity, and the travel speed curve of the self-propelled vehicle is recorded in real time.

Images