A minimum water blocking unit with multiple limiting mechanisms

Abstract

The application discloses a minimum water blocking unit with multiple limiting mechanisms, and relates to the technical field of water blocking equipment, in particular to a water blocking unit which comprises a base arranged on the ground and a water blocking panel which is hinged to the rear end of the base and can be opened upwardly by rotating the front end of the water blocking panel; at least two sets of limiting mechanisms are arranged between the base and the water-approaching surface of the water blocking panel to provide pulling force to the water blocking panel so as to restrict the maximum opening angle of the water blocking panel, the limiting mechanisms have opposite upper ends and lower ends; the upper ends of the at least two sets of limiting mechanisms are connected to the water-approaching surface of the water blocking panel at different heights, and the lower ends are connected to the base; when the water blocking panel is hinged to the base, the limiting mechanisms are all accommodated below the water blocking panel. By arranging the at least two sets of limiting mechanisms, the water pressure on the water blocking panel when the water blocking panel is opened to the maximum angle is shared, the single connecting rod is prevented from being broken due to excessive force, and the load bearing safety and reliability of the water blocking unit are improved.

Description

Technical Field

[0001] This invention relates to the field of water-blocking equipment technology, specifically a minimum water-blocking unit with multiple limiting mechanisms. Background Technology

[0002] Automatic water-blocking units are used for flood prevention at the entrances of underground buildings. The water-blocking panel flips up and opens under the buoyancy of incoming water, and the opening angle is limited by a limiting mechanism to block the water flow.

[0003] Chinese invention patent CN106836124B discloses a high-water-level water-blocking unit. The water-blocking panel is composed of multiple sub-plates longitudinally spliced ​​together. The base has a water storage cavity, a float plate is provided on the lower surface of the panel, and the base has a water inlet hole connecting the water storage cavity and the front space of the device. This device increases the water-blocking height by splicing the sub-plates longitudinally, and uses a single connecting rod to connect the water-blocking panel and the base to limit the opening angle.

[0004] In high-water-level flood control scenarios, the increased height of the flood control panel leads to a significant increase in water pressure. The tensile force on a single connecting rod increases sharply with the increase in flood control height, easily exceeding the material's yield strength and posing a risk of fracture failure.

[0005] Furthermore, as the height of the water barrier increases, the problem of insufficient structural rigidity of the water barrier panel itself becomes apparent. Under high water pressure, if the panel is constrained at a single point by only a single connecting rod, the distributed water pressure on the water-facing surface of the panel will be concentrated at that single connection point, making the panel structure prone to bending deformation. Summary of the Invention

[0006] The purpose of this invention is to provide a minimum water-blocking unit with multiple limiting mechanisms to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A minimum water-blocking unit with multiple limiting mechanisms includes a base on the ground and a water-blocking panel that covers the base and is rotatably connected to the rear end of the base. The front end of the water-blocking panel can be rotated upward to open, thereby blocking water from flowing from the water-facing side of the water-blocking panel to the water-repellent side. At least two sets of limiting mechanisms are provided between the base and the water-facing side of the water-blocking panel to provide tension to the water-blocking panel and constrain its maximum opening angle. The limiting mechanisms have opposing upper and lower ends. The upper ends of the at least two sets of limiting mechanisms are connected to different heights of the water-facing side of the water-blocking panel, and the lower ends are connected to the base. When the water-blocking panel is closed on the base, all the limiting mechanisms are retracted below the water-blocking panel. By setting at least two sets of limiting mechanisms, the water pressure on the water-blocking panel when it is opened to its maximum angle is distributed, avoiding the failure of a single connecting rod due to excessive force, thus improving the load-bearing safety and reliability of the water-blocking unit. At the same time, when the limiting mechanisms are not in the water-blocking state, they are retracted below the panel, not occupying passage space and ensuring normal passage for people and vehicles.

[0008] Preferably, the connection points between the upper ends of the at least two sets of limiting mechanisms and the water-blocking panel are located in the same vertical plane, so that multiple sets of limiting mechanisms can share the storage space below the water-blocking panel when stored, avoiding the increase in storage space width and base cost caused by the left and right misalignment of each limiting mechanism.

[0009] Preferably, the limiting mechanisms are all rigid limiting mechanisms that provide rigid tensile force, or at most one set of rigid limiting mechanisms that provide rigid tensile force and the rest are elastic limiting mechanisms that provide elastic tensile force. When all limiting mechanisms are rigid limiting mechanisms, the structure is the most streamlined, and multi-point constraint can be achieved at the lowest cost while ensuring manufacturing and installation accuracy. When a combination of at most one set of rigid limiting mechanisms and the rest of elastic limiting mechanisms is used, the deformation capacity of the elastic limiting mechanisms can be used to coordinate the length matching between the various limiting mechanisms, reducing the requirements for manufacturing and installation accuracy.

[0010] Preferably, the limiting mechanism comprises at most one rigid limiting mechanism providing rigid tension and the rest being elastic limiting mechanisms providing elastic tension. When the water-blocking panel rotates upward and opens to a preset angle, the elastic limiting mechanism first provides elastic tension to the water-blocking panel, and continues to provide elastic tension as the water-blocking panel continues to open, until the rigid limiting mechanism provides rigid tension to the water-blocking panel, at which point the water-blocking panel opens to its maximum angle. Through this graded constraint method of elastic limiting mechanism intervening first and rigid limiting mechanism finally stopping, the elastic limiting mechanism can continue to deform after intervention, absorbing the length errors of each limiting mechanism, ensuring that all limiting mechanisms can effectively participate in bearing the force, and avoiding the problem of load concentration caused by some limiting mechanisms tightening too early while others loosen.

[0011] Preferably, when the water-blocking panel is opened to its maximum angle and the water-blocking height reaches its maximum, the elastic tension provided by the elastic limiting mechanism is no greater than the rigid tension provided by the rigid limiting mechanism. In this way, the rigid limiting mechanism bears most of the water pressure load, while the elastic limiting mechanism provides auxiliary constraint to ensure the system's rigidity at the maximum water-blocking level.

[0012] Preferably, the elastic limiting mechanism includes at least one tension component with an upper end and a lower end, and at least one elastic component, which are connected to each other and disposed between the water-facing surface of the water-retaining panel and the base. Through the series combination of the tension component and the elastic component, the tension component undertakes the main force transmission function, while the elastic component provides a recoverable deformation stroke. Together, they achieve the elastic constraint function, resulting in a clear structural hierarchy that facilitates modular design and maintenance / replacement.

[0013] Preferably, the elastic component is configured in at least one of the following ways: The elastic component connects the upper end of the tension component and the water-facing surface of the water-retaining panel; The elastic component is connected between the lower end of the tension component and the base; The elastic component is connected in series between at least two tension components.

[0014] The three configuration options can be flexibly selected based on the internal space of the base, the structure of the water-blocking panel, and the ease of installation and maintenance, to meet the installation needs of different application scenarios.

[0015] Preferably, the elastic component is connected between the lower end of the tension component and the base. The elastic component includes a slider for connecting the lower end of the tension component, an elastic element disposed between the connection point where the lower end of the limiting mechanism connects to the base and the slider, and a guide mechanism for guiding the slider to reciprocate along the direction parallel to the water flow. The elastic element extends and retracts with the reciprocating movement of the slider. When the baffle panel is rotated upward to open to a preset angle, the lower end of the tension component generates a tension force on the slider, causing the slider to move along the direction of the water flow. The elastic element generates resistance to the movement of the slider, thereby causing the tension component connected to the slider at its lower end to generate an elastic tension force on the baffle panel, without restricting the continued opening of the baffle panel. When the baffle panel is rotated downward to close, the slider moves in the opposite direction under the action of the elastic element until it returns to its original position.

[0016] Preferably, the elastic component is connected between the upper end of the tension component and the water-facing surface of the baffle panel; the elastic component includes a slider for connecting the upper end of the tension component, an elastic element disposed between the connection point of the upper end of the limiting mechanism and the water-facing surface of the baffle panel and the slider, and a guide mechanism for guiding the slider to reciprocate along the length direction of the water-facing surface of the baffle panel; the elastic element extends and retracts with the reciprocating movement of the slider; when the baffle panel is rotated upward to open to a preset angle, the upper end of the tension component generates a tension force on the slider, causing the slider to move along the guide mechanism, and the elastic element generates resistance to the movement of the slider, thereby causing the tension component connected to the slider at its upper end to generate an elastic tension force on the baffle panel, without restricting the continued opening of the baffle panel; when the baffle panel is rotated downward to close, the slider moves in the opposite direction under the action of the elastic element until it returns to its original position.

[0017] Preferably, the elastic element is a stacked disc spring assembly with multiple disc springs arranged opposite each other. The guiding mechanism includes a guide rod passing through the interior of the disc spring assembly and a fixed block located at the connection point. One end of the guide rod is fixedly connected to the slider, and the other end passes through the fixed block and is slidably connected to it. The disc spring assembly is located on the guide rod between the fixed block and the slider. When the tensioning component moves the slider, the disc spring assembly is compressed. Using a disc spring assembly as the elastic element provides high stiffness, controllable deformation, and can provide greater elastic resistance in a compact space, ensuring reliable operation.

[0018] Preferably, the elastic element is a disc spring group in which multiple disc springs are stacked opposite each other. The guiding mechanism includes a guide rod passing through the inside of the disc spring group and a fixed block set at the connection point. One end of the guide rod is fixedly connected to the fixed block, and the other end of the guide rod passes through the slider and is slidably connected to it. The disc spring group is located on the guide rod between the fixed block and the slider. When the tensioning component drives the slider to move, the disc spring group is compressed.

[0019] Preferably, the guiding mechanism further includes a hollow sleeve, in which the fixing block, disc spring assembly, guide rod and slider are all located. The slider can slide inside the hollow sleeve. A groove is provided on the hollow sleeve, and the slider is rotatably connected to the end of the tension component by a pin passing through the groove.

[0020] Compared with the prior art, the beneficial effects of the present invention are: By setting at least two sets of limiting mechanisms, the water pressure on the water-blocking panel when it is opened to the maximum angle is distributed, avoiding the failure of a single connecting rod due to excessive force, and improving the load-bearing safety and reliability of the water-blocking unit.

[0021] The configuration scheme adopts at most one rigid limiting mechanism and the rest are elastic limiting mechanisms. When the water-blocking panel is opened upward, the elastic limiting mechanism intervenes before the rigid limiting mechanism and continuously provides elastic tension. This effectively absorbs the length difference between the various limiting mechanisms, ensuring that all limiting mechanisms can participate in bearing the force and avoiding the problem of asynchronous force distribution caused by manufacturing and installation errors in the pure rigid scheme.

[0022] Multiple sets of limiting mechanisms are connected at different heights on the water-facing surface of the baffle panel to form multi-point constraints, which makes the water pressure distributed more evenly to the base and prevents the baffle panel from bending and deforming under high water levels.

[0023] When the water-retaining panel is closed on the base, all limiting mechanisms are stored under the water-retaining panel without taking up extra space, ensuring a flat passage surface and meeting the daily needs of people and vehicles at the entrance of underground buildings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0026] Figure 3 This is a schematic diagram of the elastic limiting component in this invention.

[0027] Figure 4 This is a schematic diagram of the structure of the elastic limiting component set on the base in this invention.

[0028] Figure 5 This is a schematic diagram of an elastic component structure in the elastic limiting assembly of the present invention.

[0029] Figure 6 This is a schematic diagram of the tension component in the elastic limiting assembly of the present invention.

[0030] Figure 7 This is a schematic diagram of another elastic component structure in the elastic limiting assembly of the present invention. Detailed Implementation

[0031] The following description, in conjunction with the accompanying drawings of the embodiments of the present invention, will focus on the following points. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. In addition, for ease of description, the directional terms such as "upper," "lower," "front," "rear," "facing water," and "back water" mentioned below are based on the conventional usage posture of the water-blocking panel 2 when it is in the water-blocking open state; "water flow direction" refers to the horizontal direction in which the water flows from the water-facing side of the water-blocking panel 2 to the back water side and impacts the water-blocking panel 2.

[0032] Definition of "Minimum Water-Blocking Unit": In this invention, the "minimum water-blocking unit" refers to an indivisible, independent water-blocking module in the water-blocking device. It comprises a complete base 1, a water-blocking panel 2, and a limiting mechanism 3, and can independently perform the water-blocking function. Multiple minimum water-blocking units can be horizontally spliced ​​to form a water-blocking wall, which is placed between two side walls for water blocking. Side sealing strips are provided between both ends of the water-blocking unit and the side walls to achieve a sealed water-blocking effect between the water-blocking unit and the side walls.

[0033] Regarding the definitions of "rigid tension" and "elastic tension": In this invention, "rigid tension" refers to the negligible deformation of the limiting mechanism within the normal water-blocking load range of the water-blocking panel 2, directly transmitting tension in an approximately constant-length manner; "elastic tension" refers to the ability of the limiting mechanism to generate recoverable elastic deformation during the force application process, storing elastic potential energy, providing elastic buffer stroke, and restoring force through this elastic deformation. The limiting mechanism providing rigid tension is called rigid limiting mechanism 32, and the limiting mechanism providing elastic tension is called elastic limiting mechanism 31.

[0034] Please see Figure 1 The present invention discloses a minimum water-blocking unit with multiple limiting mechanisms, including a base 1 disposed on the ground and a water-blocking panel 2 covering the base 1 and rotatably connected to the rear end of the base 1. The base 1 is pre-embedded in the ground or fixed by a rear anchor. The rear end of the water-blocking panel 2 is hinged to the rear end of the base 1 through a hinge shaft, and the front end can be rotated upward around the hinge shaft to open, thereby blocking water flow from the water-facing side of the water-blocking panel 2 to the water-repellent side.

[0035] At least two sets of limiting mechanisms 3 are provided between the base 1 and the water-facing surface of the water-retaining panel 2 to provide tension to the water-retaining panel 2 and constrain the maximum opening angle of the water-retaining panel 2. The limiting mechanisms 3 have opposite upper and lower ends; the upper ends of the at least two sets of limiting mechanisms 3 are connected to different heights of the water-facing surface of the water-retaining panel 2, and the lower ends are connected to the base 1; when the water-retaining panel 2 is closed on the base 1, the limiting mechanisms 3 are all stored under the water-retaining panel 2; by setting at least two sets of limiting mechanisms 3, the water pressure on the water-retaining panel 2 when it is opened to the maximum angle is distributed, the burden on a single limiting mechanism is reduced, and the failure of the limiting mechanism 3 is avoided, which could cause a safety accident.

[0036] It should be noted that at least two sets of limiting mechanisms 3 are configured with identical structures but different overall lengths. The tension components in each limiting mechanism 3 have identical cross-sectional shapes, material specifications, and connection node structures, but the overall effective length of each limiting mechanism 3 (i.e., the unfolded distance between the upper and lower connection points) is set to different values. This length difference is achieved as follows: the upper ends of each limiting mechanism 3 are connected to different heights on the water-facing surface of the baffle panel 2, and the lower ends are connected to corresponding anchor points on the base 1, thus giving each limiting mechanism 3 different effective lengths at the same opening angle of the baffle panel 2. Therefore, when the baffle panel 2 starts to rotate upward from the closed state to open, the limiting mechanism 3 with the shorter effective length is first tightened and enters a tensioned state; as the baffle panel 2 continues to open, the limiting mechanism 3 with the longer effective length subsequently enters a tensioned state, and after the baffle panel 2 reaches its maximum opening angle, all limiting mechanisms 3 jointly provide tension, distributing the water pressure on the baffle panel 2.

[0037] Please see Figure 2 At least two sets of limiting mechanisms 3 have their upper ends connected to the water-blocking panel 2 at the same vertical plane, so that multiple sets of limiting mechanisms 3 can share the limited storage space below the water-blocking panel 2 when stored, avoiding the increase in storage width due to the left and right misalignment of each limiting mechanism 3.

[0038] Please see Figure 1 and Figure 2 All three limiting mechanisms are rigid limiting mechanisms 32 that provide rigid tension, or at most one set of rigid limiting mechanisms 32 that provide rigid tension and the rest are elastic limiting mechanisms 31 that provide elastic tension.

[0039] In the above scheme, although we set up two sets of limiting mechanisms 3 to share the water pressure on the water-blocking panel 2, when the limiting mechanisms 3 are all rigid limiting mechanisms 32 that provide rigid tension, the length design requirements of each rigid limiting mechanism 32 are very high. All rigid limiting mechanisms 32 must reach the tension state at the same time in order to jointly provide tension and share the water pressure on the water-blocking panel 2; otherwise, when one rigid limiting mechanism 32 reaches the tension state, the other rigid limiting mechanisms 32 have not yet reached the tension state and will not be under force, so setting up these rigid limiting mechanisms 32 is meaningless.

[0040] To avoid this problem, our preferred solution is to have at most one rigid limiting mechanism 32 and the rest are elastic limiting mechanisms 31. When the water-blocking panel 2 is rotated upward and opened to a certain angle (i.e., the preset angle), the elastic limiting mechanism 31 first provides elastic tension to the water-blocking panel 2, and continues to provide elastic tension as the water-blocking panel 2 continues to open, until the rigid limiting mechanism 32 provides rigid tension to the water-blocking panel 2. At this time, the water-blocking panel 2 is opened to the maximum angle.

[0041] When the water-blocking panel 2 is opened to its maximum angle and the water-blocking height reaches its maximum, the elastic tension provided by the elastic limiting mechanism 31 is no greater than the rigid tension provided by the rigid limiting mechanism 32.

[0042] The elastic limiting mechanism 31 includes at least one tension member 311 with an upper end and a lower end and at least one elastic member 312, which are connected to each other and disposed between the water-facing surface of the water-blocking panel 2 and the base 1.

[0043] The core function of the elastic limiting mechanism 31 is to provide a variable constraint force with a buffered stroke. When the water-blocking panel 2 rotates upward to open to a preset angle, the elastic limiting mechanism 31 is activated and begins to bear force. Its internal elastic component 312 undergoes a recoverable deformation, allowing the water-blocking panel 2 to continue opening while continuously applying a gradually increasing elastic tension. This design cleverly solves the problem of multiple purely rigid limiting mechanisms failing to bear force synchronously due to manufacturing and installation errors. In this invention, there are various specific implementation forms depending on the setting position and connection method of the elastic component 312, which will be described in detail below with reference to different embodiments. Example

[0044] Please see Figure 2 and Figure 3 This embodiment focuses on the scheme in which the elastic component 312 is disposed at the lower end of the limiting mechanism 3. This scheme has advantages in terms of structural compactness and ease of maintenance.

[0045] Please see Figure 4 and Figure 5Specifically, the elastic member 312 is connected between the lower end of the tension member 311 and the base 1, and includes a slider 3121 for connecting the lower end of the tension member 311, an elastic element 3123, and a guide mechanism 3122 for guiding the slider 3121 to move. The guide mechanism 3122 is used to limit the slider 3121 to reciprocate linearly only in a direction parallel to the water flow direction.

[0046] The elastic element 3123 is located between the connection point between the lower end of the limiting mechanism 3 and the base 1 and the slider 3121. It extends and retracts as the slider 3121 moves back and forth. When the baffle panel 2 is closed, the entire limiting mechanism 3 is housed under the baffle panel 2. At this time, the elastic element 3123 is in its initial state, which can be a free state without load or a compressed state with a certain pre-pressure. When the baffle panel 2 is rotated upward to open to a preset angle, the tension component 311, which was originally in a relaxed or slightly tense state, is straightened and tightened. Its lower end generates a tension force along the water flow direction on the slider 3121. Under this tension, the elastic element 3123 is compressed and produces elastic deformation, which generates resistance to the movement of the slider 3121. This causes the tension component 311, which is connected to the slider 3121 at its lower end, to generate an elastic tension force on the baffle panel 2, without restricting the continued opening of the baffle panel 2.

[0047] This elastic deformation stroke absorbs the length differences between the various limiting mechanisms, ensuring that all elastic limiting mechanisms 31 can effectively participate in the force-bearing process, and allowing the water-blocking panel 2 to continue opening until the final rigid limiting mechanism 32 tightens to provide tension.

[0048] When the flood recedes, the water-blocking panel 2 rotates downwards and closes under the action of gravity or external auxiliary force. The tension acting on the tension component 311 gradually decreases, and the elastic potential energy stored in the compressed elastic element 3123 is released. The slider 3121 moves in the opposite direction under the action of the elastic element 3123 until it returns to its original position.

[0049] Please see Figure 6 In a preferred embodiment of this invention, the tension member 311 is a folding rod structure, including an upper connecting rod 3111 and a lower connecting rod 3112. One end of the upper connecting rod 3111 is hinged to the water-facing surface of the water-blocking panel 2, and the other end is hinged to one end of the lower connecting rod 3112. The other end of the lower connecting rod 3112 is connected to the elastic member 312. When the water-blocking panel 2 is closed onto the base 1, the upper connecting rod 3111 and the lower connecting rod 3112 rotate relative to each other around their hinge point and are folded and stored under the water-blocking panel 2.

[0050] Please see Figure 5More specifically, in this embodiment, the elastic element 3123 is a disc spring assembly, which is composed of multiple disc springs stacked opposite each other. With its high stiffness and small deformation characteristics, it provides strong elastic resistance within a limited space. The elastic element 3123 is a disc spring assembly of multiple disc springs stacked opposite each other. The guide mechanism 3122 includes a guide rod 31221 passing through the interior of the disc spring assembly and a fixing block 31222 located at the connection point. One end of the guide rod 31221 is fixedly connected to the slider 3121, and the other end passes through the fixing block 31222 and is slidably connected to it. The disc spring assembly is located on the guide rod 31221 between the fixing block 31222 and the slider 3121.

[0051] Furthermore, the guide mechanism 3122 also includes a hollow sleeve. The fixing block 31222, the disc spring assembly, the guide rod 31221 and the slider 3121 are all located inside the hollow sleeve. The slider 3121 can slide inside the hollow sleeve. A groove is provided on the hollow sleeve. The slider 3121 is rotatably connected to the end of the tension member 311 by a pin passing through the groove. In this embodiment, the hollow sleeve is the tube that constitutes the base 1.

[0052] Please see Figure 7 As an alternative implementation, the fixing method of the guide rod 31221 can also be reversed, that is, one end of the guide rod 31221 is fixedly connected to the fixing block 31222, and the other end passes through the slider 3121 and is slidably connected to it. The disc spring assembly is still located on the guide rod 31221 between the fixing block 31222 and the slider 3121, and its functional principle remains unchanged.

[0053] As another supplementary embodiment, the tension component 311 can also employ a flexible chain or flexible rope structure. For example, a high-strength stainless steel chain or ultra-high molecular weight polyethylene rope can be used. In this case, the structure of the elastic component 312 can be simplified accordingly. The elastic element 3123 can directly employ one or more parallel tension springs, one end of which is connected to a connection point on the base 1, and the other end is directly or via a slider connected to the lower end of the flexible chain / rope constituting the tension component 311. When the tension component 311 is tensioned and exerts a pulling force on the elastic component 312, the tension spring is stretched, providing elastic tension. This method has a simpler structure, lower cost, and is suitable for scenarios where the requirements for opening angle control and load-bearing capacity are not complex. Of course, the guidance and protection of the tension spring can also be achieved using sleeves or other methods.

[0054] As another alternative implementation, the tension component 311 can also adopt a telescopic rod structure, including inner and outer tubes that are nested together and a locking pin. The inner and outer tubes can slide relative to each other along the axial direction to change the overall length. After the water baffle panel 2 is opened to the maximum angle, the length is fixed by the locking pin to transmit rigid tension or elastic tension. Example

[0055] The difference between this embodiment and Embodiment 1 is that the elastic component 312 is connected between the upper end of the tension component 311 and the water-facing surface of the water-retaining panel 2. This arrangement allows the motion load of the mechanism to be directly applied to the water-retaining panel 2.

[0056] Specifically, the elastic component 312 includes a slider 3121 for connecting the upper end of the tension component 311, an elastic element 3123 disposed between the connection point of the upper end of the limiting mechanism 3 and the water-facing surface of the water-blocking panel 2 and the slider 3121, and a guide mechanism 3122 for guiding the slider 3121 to reciprocate along the length direction of the water-facing surface of the water-blocking panel 2; the elastic element 3123 extends and retracts with the reciprocating movement of the slider 3121; when the water-blocking panel 2 is rotated upward to open to a preset angle, the upper end of the tension component 311 generates a tension force on the slider 3121, causing the slider 3121 to move along the guide mechanism 3122, and the elastic element 3123 generates resistance to the movement of the slider 3121, thereby causing the tension component 311 connected to the upper end of the slider 3121 to generate an elastic tension force on the water-blocking panel 2, without restricting the continued opening of the water-blocking panel 2; when the water-blocking panel 2 is rotated downward to close, the slider 3121 moves in the opposite direction under the action of the elastic element 3123 until it returns to its original position.

[0057] It should be noted that in this embodiment, the length direction of the water-facing surface of the water-blocking panel 2 refers to the direction from its front end to its rear end on the water-facing surface of the water-blocking panel 2.

[0058] In this embodiment, the tension member 311 can also preferably be the aforementioned folding rod structure, in which case one end of the upper connecting rod 3111 is rotatably connected to the slider 3121 in the elastic member 312. The elastic element 3123 can also be a disc spring assembly set on the guide rod. The guide rod and the disc spring assembly are arranged along the length direction of the water-facing surface of the water-blocking panel 2. Its specific sliding fit structure is basically the same as the structure described in Embodiment 1, except that the mounting base is changed from the base 1 to the water-facing surface of the water-blocking panel 2, which will not be described again here. Of course, the elastic element 3123 in this embodiment can also be a spring, such as a tension spring, with its two ends connected to the connection point on the water-blocking panel 2 and the upper end of the tension member 311, respectively. Example

[0059] This embodiment provides a method for connecting the elastic component 312 in series with the middle section of the tension component 311.

[0060] Specifically, the tension component 311 consists of at least two sections; for example, the upper section is a connecting rod or rope, and the lower section is also a connecting rod or rope, with the elastic component 312 connected in series between these two sections. A simple implementation is that the elastic component 312 is a tension spring, with its upper end connected to the lower end of the upper section of the tension component 311, and its lower end connected to the upper end of the lower section of the tension component 311. When the entire limiting mechanism 3 is tensioned, the tension spring connected in the middle is stretched, providing the required elastic deformation and tension. This method offers the highest structural integration and is the most convenient to install.

[0061] It is particularly important to emphasize that the above embodiments and their technical features can be mixed and matched in multiple limiting mechanisms 3 within the same minimum water-blocking unit. For example, one set can use the lower elastic structure with disc springs as described in Embodiment 1 as an elastic limiting mechanism 31, while another set can use the structure with tandem tension springs as described in Embodiment 3 as another elastic limiting mechanism 31, with a rigid limiting mechanism 32 providing the final stop. It is only necessary to ensure that the direction of the tension and the total tension distribution provided by each mechanism meet the design requirements when the water-blocking panel 2 reaches its maximum opening angle. This flexible configuration provides great design freedom, allowing for optimized selection based on different project budgets, performance indicators, and installation environments.

[0062] Furthermore, in order to ensure the reliability of these connection points during the repeated opening and closing of the water-blocking panel 2, as well as the certainty of force transmission, in all the above embodiments, the connection between the upper end of the limiting mechanism 3 and the water-facing surface of the water-blocking panel 2, and the lower end and the base 1, are preferably rotatable connections, such as pin connections or ball joint connections. Example

[0063] In another implementation, all of the limiting mechanisms 3 are rigid limiting mechanisms 32. The rigid limiting mechanism 32 can adopt the same two-section folding rod structure as the elastic limiting mechanism 31 described above (hinged together by an upper connecting rod 3111 and a lower connecting rod 3112), but without the elastic component 312. The upper connecting rod 3111 and the lower connecting rod 3112 directly transmit tension through the hinge point, and the overall effective length is fixed. When the water-blocking panel 2 is closed, the upper connecting rod 3111 and the lower connecting rod 3112 rotate and fold relative to each other, storing themselves below the water-blocking panel 2; when the water-blocking panel 2 is opened to its maximum angle, each rigid limiting mechanism 32 simultaneously or sequentially enters a tensioned state, jointly providing rigid tension.

[0064] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Furthermore, the contents not described in detail in this specification are all prior art known to those skilled in the art.

Claims

1. A minimum water-blocking unit with multiple limiting mechanisms, characterized in that, The system includes a base (1) on the ground and a water-blocking panel (2) that covers the base (1) and is rotatably connected to the rear end of the base (1). The front end of the water-blocking panel (2) can be rotated upward to open, thereby blocking water from flowing from the water-facing side of the water-blocking panel (2) to the water-repellent side. At least two sets of limiting mechanisms (3) are provided between the base (1) and the water-facing side of the water-blocking panel (2) to provide tension to the water-blocking panel (2) to constrain the maximum opening angle of the water-blocking panel (2). The limiting mechanisms (3) have an upper end and a lower end. The upper end of the at least two sets of limiting mechanisms (3) is connected to different heights of the water-facing side of the water-blocking panel (2), and the lower end is connected to the base (1). When the water-blocking panel (2) is covered on the base (1), the limiting mechanisms (3) are all stored below the water-blocking panel (2).

2. The minimum water-blocking unit with multiple limiting mechanisms according to claim 1, characterized in that, The connection points between the upper ends of the at least two sets of limiting mechanisms (3) and the water-blocking panel (2) are located in the same vertical plane.

3. The minimum water-blocking unit with multiple limiting mechanisms according to claim 1, characterized in that, The limiting mechanisms (3) are all rigid limiting mechanisms (32) that provide rigid tension, or at most one set of rigid limiting mechanisms (32) that provide rigid tension and the rest of the elastic limiting mechanisms (31) that provide elastic tension.

4. The minimum water-blocking unit with multiple limiting mechanisms according to claim 3, characterized in that, The limiting mechanism (3) consists of at most one rigid limiting mechanism (32) that provides rigid tension and the rest are elastic limiting mechanisms (31) that provide elastic tension. When the water-blocking panel (2) is rotated upward to open to a preset angle, the elastic limiting mechanism (31) first provides elastic tension to the water-blocking panel (2), and continues to provide elastic tension as the water-blocking panel (2) continues to open, until the rigid limiting mechanism (32) provides rigid tension to the water-blocking panel (2). At this time, the water-blocking panel (2) is opened to the maximum angle.

5. A minimum water-blocking unit with multiple limiting mechanisms according to claim 4, characterized in that, When the water-blocking panel (2) is opened to the maximum angle and the water-blocking height reaches the maximum, the elastic tension provided by the elastic limiting mechanism (31) is not greater than the rigid tension provided by the rigid limiting mechanism (32).

6. A minimum water-blocking unit with multiple limiting mechanisms according to claim 3 or 4, characterized in that, The elastic limiting mechanism (31) includes at least one tension member (311) with an upper end and a lower end and at least one elastic member (312), which are connected to each other and disposed between the water-facing surface of the water-blocking panel (2) and the base (1).

7. A minimum water-blocking unit with multiple limiting mechanisms according to claim 6, characterized in that, The elastic component (312) is provided in at least one of the following ways: The elastic component (312) is connected between the upper end of the tension component (311) and the water-facing surface of the water-blocking panel (2); The elastic component (312) is connected between the lower end of the tension component (311) and the base (1); The elastic member (312) is connected in series between at least two tension members (311).

8. A minimum water-blocking unit with multiple limiting mechanisms according to claim 7, characterized in that, The elastic component (312) is connected between the lower end of the tension component (311) and the base (1). The elastic component (312) includes a slider (3121) for connecting the lower end of the tension component (311), an elastic element (3123) disposed between the connection point where the lower end of the limiting mechanism (3) connects to the base (1) and the slider (3121), and a guide mechanism (3122) for guiding the slider (3121) to reciprocate in a direction parallel to the water flow direction; the elastic element (3123) extends and retracts with the reciprocating movement of the slider (3121); when the water baffle panel (2) When the slider is rotated upward to open to the preset angle, the lower end of the tension component (311) generates tension on the slider (3121), causing the slider (3121) to move along the direction of water flow. The elastic element (3123) generates resistance to the movement of the slider (3121), thereby causing the tension component (311) connected to the slider (3121) at the lower end to generate elastic tension on the baffle panel (2), without restricting the continued opening of the baffle panel (2). When the baffle panel (2) is rotated downward to close, the slider (3121) moves in the opposite direction under the action of the elastic element (3123) until it returns to its original position.

9. A minimum water-blocking unit with multiple limiting mechanisms according to claim 7, characterized in that, The elastic component (312) is connected between the upper end of the tension component (311) and the water-facing surface of the water-blocking panel (2); the elastic component (312) includes a slider (3121) for connecting the upper end of the tension component (311), an elastic element (3123) disposed between the connection point of the upper end of the limiting mechanism (3) and the water-facing surface of the water-blocking panel (2) and the slider (3121), and a guide mechanism (3122) for guiding the slider (3121) to reciprocate along the length direction of the water-facing surface of the water-blocking panel (2); the elastic element (3123) extends and retracts with the reciprocating movement of the slider (3121); When the water-blocking panel (2) is rotated upward to open to a preset angle, the upper end of the tension component (311) generates a tension force on the slider (3121), causing the slider (3121) to move along the guide mechanism (3122). The elastic element (3123) generates resistance to the movement of the slider (3121), thereby causing the tension component (311) connected to the slider (3121) at its upper end to generate an elastic tension force on the water-blocking panel (2), without restricting the continued opening of the water-blocking panel (2). When the water-blocking panel (2) is rotated downward to close, the slider (3121) moves in the opposite direction under the action of the elastic element (3123) until it returns to its original position.

10. A minimum water-blocking unit with multiple limiting mechanisms according to claim 8 or 9, characterized in that, The elastic element (3123) is a disc spring group in which multiple disc springs are stacked opposite each other. The guide mechanism (3122) includes a guide rod (31221) passing through the inside of the disc spring group and a fixed block (31222) set at the connection point. One end of the guide rod (31221) is fixedly connected to the slider (3121), and the other end of the guide rod (31221) passes through the fixed block (31222) and is slidably connected to it. The disc spring group is located on the guide rod between the fixed block (31222) and the slider (3121).

11. A minimum water-blocking unit with multiple limiting mechanisms according to claim 8 or 9, characterized in that, The elastic element (3123) is a disc spring group in which multiple disc springs are stacked opposite each other. The guide mechanism (3122) includes a guide rod (31221) passing through the inside of the disc spring group and a fixed block (31222) set at the connection point. One end of the guide rod (31221) is fixedly connected to the fixed block (31222), and the other end of the guide rod (31221) passes through the slider (3121) and is slidably connected to it. The disc spring group is located on the guide rod between the fixed block (31222) and the slider (3121).

12. A minimum water-blocking unit with multiple limiting mechanisms according to claim 10, characterized in that, The guide mechanism (3122) also includes a hollow sleeve. The fixing block (31222), disc spring assembly, guide rod (31221) and slider (3121) are all located inside the hollow sleeve. The slider (3121) can slide inside the hollow sleeve. A groove is provided on the hollow sleeve. The slider (3121) is rotatably connected to the end of the tension component (311) by a pin passing through the groove.

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