Rope type rotating weir and control method of rope type rotating weir

Abstract

The invention discloses a rope type rotating weir and a control method thereof, and the rope type rotating weir comprises a weir plate which is rotatably arranged in a water passing channel and divides the water passing channel into an upstream and a downstream; a fixed pulley; a deflecting pulley; one end of the traction rope is connected with the weir plate, and the other end sequentially bypasses the fixed pulley and the steering pulley to be connected with the driving device; and the driving device is used for winding and unwinding the traction rope, so that the traction rope can drive the weir plate to rotate. In the process of increasing the opening degree of the weir plate, the gravity of the weir plate is beneficial to continuous increase of the opening degree. And in the process of reducing the opening of the weir plate, the opening can be continuously reduced under the action of water pressure. Therefore, based on the rope type rotating weir, the opening degree of the weir plate can be controlled by controlling the winding and unwinding amount of the traction rope, and the precision reliability and controllability are better. And no matter the opening degree is increased or decreased, the pressure or water pressure of the weir plate is beneficial to rotation of the weir plate, and the driving device is more labor-saving, so that the advantage of low energy consumption is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of drainage, and in particular to a rope-type rotating weir and a control method for the rope-type rotating weir. Background Art

[0002] Weir gates are set at the outlets of pipelines, box culverts, channels, diversion wells or storage tanks. The weir gates can open and close the outlets and adjust the water flow rate. At present, most rotary weirs use hydraulic control, which is difficult to control with high accuracy and consumes a lot of energy. Summary of the invention

[0003] The main purpose of the present invention is to provide a rotating weir which is easier to control in precision and has lower energy consumption.

[0004] To achieve the above object, the first aspect of the present invention provides a rope-type rotating weir, comprising: A weir plate is rotatably arranged on the water passage, and the weir plate can divide the water passage into an upstream and a downstream; Fixed pulley; Steering pulley; A traction rope, one end of which is connected to the weir plate, and the other end of which is connected to the driving device by passing through the fixed pulley and the deflection pulley in sequence; The driving device is used for retracting and releasing the traction rope so that the traction rope can drive the weir plate to perform rotational motion.

[0005] Optionally, the rope-type rotating weir further includes a first side plate and a second side plate, and the first side plate and the second side plate are respectively located on both sides of the weir plate.

[0006] Optionally, the rope-type rotating weir further includes a positioning block, which is located at an extreme position when the weir plate closes the water passage.

[0007] Optionally, sealing strips are provided on both sides and the bottom of the weir plate.

[0008] Optionally, a rope guard tube is further provided between the steering pulley and the driving device, and the other end of the traction rope is passed around the fixed pulley and the steering pulley in sequence, passes through the rope guard tube, and is connected to the driving device.

[0009] Optionally, the traction rope is a steel wire rope.

[0010] Optionally, the rope-type rotating weir further includes a first liquid level sensor and a second liquid level sensor, wherein the first liquid level sensor is located upstream and the second liquid level sensor is located downstream.

[0011] Optionally, a tension sensor is provided between the traction rope and the driving device.

[0012] The present invention provides a rope-type rotating weir, and a driving device controls the extension or contraction of the traction rope to adjust the opening of the weir plate to realize the functions of opening and closing the water outlet and adjusting the water flow rate. In the case where the upstream water level is higher than the downstream water level, or the upstream water level exceeds the flood discharge safety value, it may be necessary to increase the opening of the weir plate, so that when the upstream water is discharged to the downstream, in the process of increasing the opening of the weir plate, the self-gravity of the weir plate is conducive to the continued increase of the opening. When the downstream water level is higher than the upstream water level, which may cause backflow, it may be necessary to reduce the opening of the weir plate to prevent the downstream water level from backflowing to the upstream. At this time, the downstream water level is high, and the effect of water pressure is conducive to the continued reduction of the opening. Therefore, based on the rope-type rotating weir, the opening of the weir plate can be controlled by controlling the retraction and release amount of the traction rope, and the reliability and controllability of the accuracy are better. Moreover, whether it is the process of increasing or decreasing the opening, the pressure or water pressure of the weir plate itself is conducive to the rotation of the weir plate, and the driving device is more labor-saving, thereby having the advantage of low energy consumption.

[0013] In larger-sized rotating weirs, the advantages of rope-type rotating weirs are more obvious. Because larger-sized rotating weirs must be controlled by double-cylinder hydraulics to ensure that the weir plate can rotate smoothly, but its synchronization control is very difficult. Due to the low synchronization accuracy, the levelness of both sides of the weir plate is difficult to ensure, and the resulting leakage is particularly obvious. With a rope-type rotating weir, the weir plate uses two sets of traction ropes to control the rotation of the weir plate. The consistency of the extension and release of the traction rope is easier to ensure, so the synchronization is easier to control, so the levelness of the weir plate rotation process can be guaranteed, and its advantages are very obvious.

[0014] The second aspect of the present invention is based on a rope-type rotating weir, and its control method includes: The control method of the rope-type rotating weir comprises: Acquire a first liquid level value, where the first liquid level value is an upstream liquid level monitored by a first liquid level sensor; Determine whether the first liquid level value is greater than a set first threshold value, where the first threshold value is a warning water level value; If the first liquid level value is greater than a set threshold value, the traction rope is controlled to extend so that the opening of the weir plate increases; Acquire a second liquid level value, where the second liquid level value is a downstream liquid level monitored by a second liquid level sensor; Determining whether the second liquid level value is greater than the first liquid level value; If the second liquid level value is greater than the first liquid level value, the traction rope is controlled to contract so that the opening of the weir plate is reduced.

[0015] In the above control method, liquid level sensors are used to monitor the liquid levels upstream and downstream of the weir plate respectively, and the opening of the weir plate is adjusted according to the liquid level conditions, thereby achieving flexible control of the weir plate to meet application requirements.

[0016] Optionally, the control method of the rope-type rotating weir includes: Calculating the opening of the weir plate according to the retraction and extension amount of the traction rope; Get the tension value of the current opening, and calculate the upstream liquid level according to the tension value of the current opening; At the current opening, if the tension value continues to increase or if the tension value continues to increase and is greater than a set first threshold value, and the first threshold value is a warning water level value, the traction rope is controlled to extend so that the opening of the weir plate increases; At the current opening, the tension value continues to decrease or the tension value continues to decrease and is less than the set second threshold value, which is a safety value required to prevent backflow. The traction rope is controlled to contract so that the opening of the weir plate is reduced.

[0017] In the above control method, the current opening of the weir plate can be calculated according to the amount of retraction and release of the traction rope, and the current water pressure on the weir plate can be calculated according to the tension value of the day, so as to infer the liquid level. The opening can be adjusted according to the liquid level conditions, and flexible control of the weir plate can be achieved to meet application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the rope-type rotating weir provided by the present invention; Figure 2 It is a schematic diagram of a partially cutaway three-dimensional structure; Figure 3 It is a schematic diagram of the working principle; Figure 4 It is a schematic diagram of the application of rope-type rotating weir in diversion well; Figure 5 An embodiment of the control logic of the weir plate opening increase process; Figure 6 An embodiment of the control logic of the weir plate opening reduction process; Figure 7 Another embodiment of the control logic for the weir plate opening increase process; Figure 8 This is another embodiment of the control logic for the weir opening reduction process.

[0020] Description of Figure Numbers: 11-side plate, 12-weir plate, 21-fixed pulley, 22-steering pulley, 23-traction rope, 24-rope protection tube, 111-positioning block, 121-bottom sealing strip, 122-lateral sealing strip, 123-rope fixing bolt. Implementation

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] If a numerical indication is involved in the embodiments of the present invention, the numerical indication is not an absolute value, and its error is usually taken into account in the actual process, and the numerical value includes a normal error range.

[0024] The specification of the weir plate in the present invention refers to the intercepted width of the water passage, that is, the larger the water passage width is, the larger the specification of the weir plate is required.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] Weir gates are installed at the outlets of pipelines, box culverts, channels, diversion wells or storage tanks to open and close the outlets and adjust the water flow rate. At present, the structures of weir gates are various. Among them, the rotating weir gate changes the flow rate of the water channel during the rotation. When the opening is 0°, the water channel can be closed to achieve the purpose of interception. The larger the opening, the greater the water flow. When the opening is 90°, the channel can be fully opened. Since the use environment is water, considering safety, the rotating weir is usually hydraulically driven, and the precision is difficult to control. In addition, the weir plate is affected by its own weight and the water pressure it bears during the rotation process, which not only makes the precision control difficult, but also increases the energy consumption of the drive device.

[0027] In view of this, the present invention provides a rope-type rotating weir, aiming to solve the problems of difficult precision control and high energy consumption of existing rotating weirs.

[0028] See also Figures 1 to 3 A rope-type rotating weir comprises: a weir plate, which is rotatably arranged in a water passage to divide the water passage into an upstream and a downstream; a fixed pulley; a steering pulley; a traction rope, one end of which is connected to the weir plate, and the other end of which is connected to a driving device by passing through the fixed pulley and the steering pulley in sequence; and a driving device, which is used to retract and release the traction rope so that the traction rope can drive the weir plate to rotate. The driving device (not shown in the figure) makes the weir plate 12 tilt under its own gravity when the traction rope 23 is extended, and the opening increases. The larger the opening of the weir plate 12, the greater the amount of water flowing, until the weir plate 12 is in a horizontal or nearly horizontal state, and its opening reaches the maximum, that is, when the opening of the weir plate is about 90°, the water passage can be fully opened. The driving device makes the traction rope 23 contract, which drives the opening of the weir plate 12 to decrease, until the weir plate 12 is in a vertical or nearly vertical state, and its opening is the minimum, that is, when the opening of the weir plate is about 0°, the water passage can be completely closed. Of course, according to the needs of flow control, the driving device can enable the traction rope 23 to drive the weir plate to control any opening between 0° and 90°.

[0029] The present invention provides a rope-type rotating weir, and a driving device controls the extension or contraction of the traction rope to adjust the opening of the weir plate to realize the functions of opening and closing the water outlet and adjusting the water flow rate. The weir plate divides the water passage into upstream and downstream. In the case that the upstream water level is higher than the downstream water level, or the upstream water level exceeds the flood safety value, it may be necessary to increase the opening of the weir plate, so that when the upstream water is discharged to the downstream, the self-gravity of the weir plate is conducive to the continued increase of the opening during the process of increasing the opening of the weir plate. When the downstream water level is higher than the upstream water level, which may cause backflow, it may be necessary to reduce the opening of the weir plate to prevent the downstream water level from backflowing to the upstream. At this time, the downstream water level is high, and the effect of water pressure is conducive to the continued reduction of the opening. Therefore, based on the rope-type rotating weir, the opening of the weir plate can be controlled by controlling the retraction and release amount of the traction rope, and the reliability and controllability of the accuracy are better. Moreover, whether it is the process of increasing or decreasing the opening, the pressure or water pressure of the weir plate itself is conducive to the rotation of the weir plate, and the driving device is more labor-saving, thereby having the advantage of low energy consumption.

[0030] In larger-sized rotating weirs, the advantages of rope-type rotating weirs are more obvious. Because larger-sized rotating weirs must be controlled by double-cylinder hydraulics to ensure that the weir plate can rotate smoothly, but its synchronization control is very difficult. Due to the low synchronization accuracy, the levelness of both sides of the weir plate is difficult to ensure, and the resulting leakage is particularly obvious. With a rope-type rotating weir, the weir plate uses two sets of traction ropes to control the rotation of the weir plate. The consistency of the extension and release of the traction rope is easier to ensure, so the synchronization is easier to control, so the levelness of the weir plate rotation process can be guaranteed, and its advantages are very obvious.

[0031] Specifically, in some feasible embodiments, for example, the two sides of the water passage are extremely flat and solid, and the weir plate 12 can independently form a diversion function with the two sides of the water passage without adding other auxiliary structures. For example, a water inlet or outlet such as a river, a channel, a box culvert, a diversion well, a regulating pool, etc. needs to be diverted and regulated. The water inlet or outlet already has extremely flat and solid sides. The weir plate 12 can be rotatably set at the water inlet or outlet, and the weir plate 12 divides the water passage there into upstream and downstream. The fixed pulley 21 is set on both sides of the water passage, one end of the traction rope 23 is fixed to the weir plate 12, and the other end bypasses the fixed pulley 21 to facilitate the rotation of the weir plate. The steering pulley 22 is also set on both sides of the water passage, and the traction rope 23 bypasses the fixed pulley 21 and then passes through the steering pulley 22 to facilitate connection with the driving device on the land.

[0032] In some feasible examples, for example, due to the limitation of the flatness or strength of both sides of the water passage, side plates need to be configured. The rope-type rotating weir also includes a first side plate and a second side plate, which are respectively located on both sides of the weir plate 12. The side plate 11 (the first side plate and the second side plate) can be a steel plate, or a plate-like structure made of cement plate or marble cast on site. Its main function is to provide a flatter or stronger or easier to provide sealing surface for the water passage, so that the weir plate 12 and the side plate 11 can jointly realize the interception and regulation of the water passage.

[0033] In some feasible examples, the rope-type rotating weir further includes a positioning block 123, which is located at the limit position when the weir plate 12 closes the water passage. Figure 3 As shown in , the weir plate 12 is in a vertical state, and the opening of the weir plate 12 is close to 0°. At this time, the water passage is completely closed, which is the limit position of the weir plate closing the water passage. The positioning block 123 is in this position, which can limit the rotation of the weir plate within a certain range. In practical applications, in the water passage, the opening of the weir plate 12 needs to be controlled within the range of 90°, as shown in FIG. Figure 3 As shown in , with the weir plate in a vertical state as the dividing point, one side is the upstream of the water passage, and the other side is the downstream of the water passage, and the weir plate 12 needs to rotate within the range of 0-90 degrees in the downstream interval. The weir plate positioning block 123 is set at 0° to prevent the weir plate 12 from rotating in the upstream interval. In the water passage of the rope-type rotating weir application, if the side plate 11 is not required, the positioning block 123 can be directly set on both sides of the water passage. If the side plate 11 is configured, the positioning block 123 can also be set on the side plate 11. The present invention is not limited to this, and the positioning block can be set to satisfy the rotation range of the weir plate.

[0034] In a more preferred embodiment, sealing strips are provided on both sides and the bottom of the weir plate 12. The bottom sealing strip 121 ensures the sealing between the bottom of the weir plate 12 and the bottom of the water passage. The side sealing strips 122 ensure the sealing between the two sides of the weir plate 12 and the sides of the water passage. Sealing strips are provided on three sides to improve the sealing of the water passage.

[0035] In a more preferred embodiment, a rope guard tube 21 is further provided between the diverting pulley 22 and the driving device, and the other end of the traction rope 23 passes through the fixed pulley 21 and the diverting pulley 22 in sequence and passes through the rope guard tube 21 to be connected to the driving device. The traction rope 23 is connected to the driving device after being led out, and the lead-out part is preferably buried underground. Therefore, adding the rope guard tube 21 can reduce the friction of the traction rope, fix the movement trajectory of the traction rope, and optimize the environment of the traction rope to avoid corrosion.

[0036] In a more preferred embodiment, the traction rope is a steel wire rope to ensure sufficient strength and service life.

[0037] In some feasible examples, the rope-type rotating weir further includes a first liquid level sensor and a second liquid level sensor, wherein the first liquid level sensor is located upstream of the water passage, and the second liquid level sensor is located downstream of the water passage. The first liquid level sensor and / or the second liquid level sensor may also be arranged on two sides of the water passage, or may be arranged on the side plate 11 of the rope-type rotating weir. The water levels upstream and downstream of the water passage are respectively monitored based on the first liquid level sensor and the second liquid level sensor, so as to provide some basis for realizing automatic control.

[0038] In some feasible examples, a tension sensor is provided between the traction rope and the driving device. The tension sensor is used to monitor the tension on the traction rope when the weir plate is at different openings, based on which the liquid level in the water channel can be calculated. The opening of the weir plate can also be calculated in combination with the length of the traction rope stretched or contracted, based on which the accuracy of the opening calculated by the tension sensor can be verified, and the accuracy of the calculated liquid level data can be further verified. The inspection data based on the tension sensor and the related data calculated therefrom can provide some basis for realizing automatic control.

[0039] The rope-type rotating weir is set in the water passage, and the weir plate needs to be intelligently controlled in combination with the functional requirements of the application scenario. Figure 4 The figure shows one of the application scenarios of the rope rotary weir. Specifically, the rope rotary weir is applied to the diversion well. In the drainage network, the diversion well is a common equipment. The diversion well is used to achieve the diversion of clean and dirty water. Its function is to: divert domestic sewage to the sewage pipe on sunny days and finally discharge it to the sewage treatment plant; intercept the initial rainwater that is relatively dirty to the sewage pipe on rainy days and discharge it to the sewage treatment plant; and discharge the relatively clean rainwater in the middle and late stages to the rainwater pipe, and finally discharge it to the natural water body. Usually, the diversion well has at least two outlets. The outlet to the sewage pipe can be controlled by a gate, and the outlet through the rainwater pipe can be controlled by a rope rotary weir. In the diversion well application, the initial opening of the rope rotary weir should be about 45°, so as to prevent the water from being discharged to the natural water body on sunny days and the first rain.

[0040] Considering that the diversion well may reach the warning water level, it is necessary to drain the water in time, so it is necessary to control the rope-type rotating weir so that the water can be discharged to the stormwater pipe in time. When the downstream water level is higher than the water level in the diversion well, it is necessary to control the rope-type rotating weir to prevent the downstream water from flowing back into the diversion well.

[0041] In some feasible embodiments, the rope-type rotating weir of the present invention can be remotely controlled based on the monitoring of the liquid level. The rope-type rotating weir comprises: a first liquid level sensor, a second liquid level sensor, and a controller, such as Figure 5 and Figure 6 , the control methods of the rope rotating weir include: Acquire a first liquid level value, where the first liquid level value is an upstream liquid level monitored by a first liquid level sensor; Determine whether the first liquid level value is greater than a set first threshold value, where the first threshold value is a warning water level value; If the first liquid level value is greater than a set threshold value, the traction rope is controlled to extend so that the opening of the weir plate increases; In the above steps, when the liquid level in the well reaches the warning water level, it is necessary to control the weir plate to open the outlet and drain the water in time.

[0042] Acquire a second liquid level value, where the second liquid level value is a downstream liquid level monitored by a second liquid level sensor; Determining whether the second liquid level value is greater than the first liquid level value; If the second liquid level value is greater than the first liquid level value, the traction rope is controlled to contract so that the opening of the weir plate is reduced.

[0043] In the above steps, when the liquid level outside the well is greater than the liquid level inside the well, it is necessary to control the weir plate to close the water outlet to prevent backflow.

[0044] In another feasible embodiment, the rope-type rotating weir of the present invention can be remotely controlled based on the monitoring of the tension. The rope-type rotating weir comprises: a tension sensor and a controller, wherein the tension sensor is arranged between the traction rope and the driving device. Figure 7 and Figure 8 , the control methods of the rope rotating weir include: Calculating the opening of the weir plate according to the retraction and extension amount of the traction rope; Get the tension value of the current opening, and calculate the upstream liquid level according to the tension value of the current opening; At the current opening, if the tension value continues to increase or if the tension value continues to increase and is greater than a set first threshold value, and the first threshold value is a warning water level value, the traction rope is controlled to extend so that the opening of the weir plate increases; In the above steps, by detecting the change of the tension value, the change of the liquid level can be determined, thereby controlling the opening of the weir plate. For example: at the current opening, the contraction amount of the traction rope is also a fixed value. If the upstream liquid level rises, the pressure on the weir plate will increase, and the tension value will continue to rise. The change of the upstream liquid level can be calculated based on the tension value. When it exceeds the warning liquid level value, the weir plate opening is controlled to increase and the water flow rate is adjusted.

[0045] At the current opening, the tension value continues to decrease or the tension value continues to decrease and is less than the set second threshold value, which is a safety value required to prevent backflow. The traction rope is controlled to contract so that the opening of the weir plate is reduced.

[0046] In the above steps, at the current opening, the contraction amount of the traction rope is also a constant value. If the downstream liquid level rises, the pressure on the weir plate will decrease and the tension value will continue to decrease. At this time, it is necessary to control the weir plate to reduce the opening to prevent backflow.

[0047] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rope-type rotating weir, characterized in that: include: A weir plate is rotatably arranged on the water passage, and the weir plate can divide the water passage into an upstream and a downstream; Fixed pulley; Steering pulley; A traction rope, one end of which is connected to the weir plate, and the other end of which is connected to the driving device by passing through the fixed pulley and the deflection pulley in sequence; A driving device, used for retracting and releasing the traction rope, so that the traction rope can drive the weir plate to perform rotational motion; A first liquid level sensor, located upstream; The second liquid level sensor is located downstream.

2. A rope type rotating weir according to claim 1, characterized in that: A tension sensor is arranged between the traction rope and the driving device.

3. Based on the rope-type rotating weir according to claim 1, the control method of the rope-type rotating weir comprises: Acquire a first liquid level value, where the first liquid level value is an upstream liquid level monitored by a first liquid level sensor; Determine whether the first liquid level value is greater than a set first threshold value, where the first threshold value is a warning water level value; If the first liquid level value is greater than a set threshold value, the traction rope is controlled to extend so that the opening of the weir plate increases; Acquire a second liquid level value, where the second liquid level value is a downstream liquid level monitored by a second liquid level sensor; determining whether the second liquid level value is greater than the first liquid level value; If the second liquid level value is greater than the first liquid level value, the traction rope is controlled to contract so that the opening of the weir plate is reduced.

4. Based on the rope type rotating weir according to claim 2, the control method of the rope type rotating weir comprises: Calculating the opening of the weir plate according to the retraction and extension amount of the traction rope; Get the tension value of the current opening, and calculate the upstream liquid level according to the tension value of the current opening; At the current opening, if the tension value continues to increase or if the tension value continues to increase and is greater than a set first threshold value, and the first threshold value is a warning water level value, the traction rope is controlled to extend so that the opening of the weir plate increases; At the current opening, the tension value continues to decrease or the tension value continues to decrease and is less than the set second threshold value, which is a safety value required to prevent backflow. The traction rope is controlled to contract so that the opening of the weir plate is reduced.

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