A seepage-proof composite geomembrane laying device for water conservancy projects

Abstract

This invention discloses a seepage-proof composite geomembrane laying device for water conservancy projects, belonging to the field of water conservancy engineering machinery. It includes an outer support frame composed of front and rear end plates and lateral crossbeams, and multiple membrane laying units connected by a combined track. Each laying unit has an inner frame, with first and second mounting shafts passing through the inner frame and supporting a detachable roller shaft. The driving wheels are coaxially fixed to the mounting shafts, achieving mechanical locking synchronization between the traveling displacement and the laying length. Multiple laying units are arranged in a staggered pattern along the traveling direction, with the driving wheel projection of the rear unit covering at least a portion of the laying path in front. This invention achieves precise control of the overlap width between adjacent geomembranes through an orthogonal adjustment system and utilizes a staggered layout to achieve a "laying and pressing simultaneously" operation, effectively solving the problems of low precision and easy wrinkling in traditional laying processes. It has significant advantages such as structural stability, high construction efficiency, and excellent seepage-proof quality.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering machinery technology, specifically to a seepage-proof composite geomembrane laying device for water conservancy projects. Background Technology

[0002] In water conservancy projects, seepage-proof composite geomembranes are widely used for seepage prevention in canals, reservoirs, dams, and other structures. During actual construction, multiple geomembrane sheets are typically spliced ​​together for installation. To ensure effective seepage prevention, the edges of adjacent geomembrane sheets must maintain a certain overlap.

[0003] Existing geomembrane laying equipment often struggles to precisely control the overlap width between adjacent geomembranes when laying multiple sheets simultaneously. This can lead to insufficient overlap causing seepage failure or excessive overlap resulting in material waste. Furthermore, existing laying equipment often employs a passive pulling method during membrane placement, leading to uneven stress and wrinkles in the geomembrane. Post-laying, manual re-adjustment and flattening are frequently required, resulting in low construction efficiency. Additionally, changing heavy geomembrane rolls using existing equipment is cumbersome, consuming significant manpower and time. Summary of the Invention

[0004] The purpose of this invention is to provide a seepage-proof composite geomembrane laying device for water conservancy projects, so as to solve the problems in the prior art that it is difficult to accurately control the overlap width of adjacent geomembranes, wrinkles are easy to form when laying the membrane, and manual flattening is required after laying.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a seepage-proof composite geomembrane laying device for water conservancy projects, comprising: An external support frame system includes two end plates that are perpendicular to the laying direction and are located at the front and rear ends, and two connecting beams that connect the two end plates and extend along the laying direction. Multiple membrane laying units are slidably connected to the end plate via a combined track structure, or slidably connected to adjacent membrane laying units, so that the membrane laying units can translate along a direction perpendicular to the laying direction. The membrane laying unit includes: A unit frame, which contains an inner frame; The first mounting shaft and the second mounting shaft are arranged perpendicular to the laying direction. The ends of the first mounting shaft and the second mounting shaft that are far apart from each other are respectively rotatably connected to two inner side walls of the unit frame that are parallel to the direction of travel. The ends that are close to each other both extend through the inner frame into its interior. A winding drum is mounted on a winding shaft, and the two ends of the winding shaft are detachably connected to the ends of the first mounting shaft and the second mounting shaft extending into the inner frame body, respectively. The walking drive wheel is coaxially fixed on the first mounting shaft so that the walking displacement of the device is kept synchronized with the length of the geomembrane laying through mechanical coaxial locking; Multiple membrane laying units are arranged in a staggered manner along the laying direction, and the projection of the driving wheel of the membrane laying unit located at the rear onto the laying direction perpendicular to the laying direction covers at least a portion of the geomembrane path laid by the membrane laying unit located at the front.

[0006] Furthermore, the driving wheel is coaxially fixedly mounted on the first mounting shaft by any one of the following methods: key connection, spline connection, or pin connection.

[0007] Furthermore, the connecting beam is provided with multiple mounting holes, and the membrane laying unit also includes an adjusting screw and a rotating handle. The adjusting screw is set perpendicular to the laying direction and is rotatably connected to the unit frame. The adjusting screw passes through the corresponding mounting hole and is threaded into the mounting hole. The rotating handle is located at the end of the adjusting screw away from the unit frame and is used to drive the membrane laying unit to move as a whole to adjust the overlap width of adjacent geomembranes.

[0008] Furthermore, the combined track structure is disposed on the front and rear sides of the unit frame perpendicular to the laying direction, and the combined track structure is a groove or tenon structure with concave and convex fits.

[0009] Furthermore, the drum shaft is detachably connected to the first mounting shaft and the second mounting shaft via a plug-in structure or a coupling structure.

[0010] Furthermore, the driving wheel in the rear membrane laying unit is positioned above the geomembrane laid by the front membrane laying unit, and the wheel surface of the driving wheel is in contact with the upper surface of the geomembrane.

[0011] Furthermore, the external support frame system is also provided with a push handle, which is respectively installed on the end plate.

[0012] Furthermore, auxiliary guide wheels can be provided below the membrane laying unit to assist the unit frame in translating along the combined track structure.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves mechanized and precise positioning adjustment of the overlap width of adjacent geomembranes by setting up a membrane laying unit that moves perpendicular to the direction of travel, in conjunction with the adjusting screw and rotating handle on the connecting beam, thus avoiding the overlap error during manual laying.

[0014] 2. This invention achieves the effect of directly rolling and smoothing the edge of the geomembrane laid in front by arranging multiple membrane laying units in a staggered manner and positioning the rear driving wheel above and in contact with the surface of the geomembrane laid in front while the device is moving to lay the membrane. This replaces the manual secondary finishing process and improves the flatness of the laying.

[0015] 3. By coaxially fixing the walking drive wheel on the first mounting shaft, the present invention achieves the effect of directly driving the roller shaft to rotate synchronously and unwind the geomembrane using the ground friction force of the device walking. This ensures the mechanical synchronization between the walking displacement and the unwinding length of the geomembrane, and avoids the membrane material from being deformed or wrinkled due to passive pulling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an anti-seepage composite geomembrane laying device for water conservancy projects according to the present invention. Figure 2 This is a schematic diagram of the overall structure of the external support frame system of the present invention; Figure 3 This is a schematic diagram of the overall three-dimensional structure of the membrane material laying unit of the present invention; Figure 4 This is an exploded structural diagram of the membrane material laying unit of the present invention; Figure 5 This is a schematic diagram of the structure of multiple membrane material laying units arranged in combination according to the present invention.

[0017] In the diagram: 1. End plate; 2. Connecting crossbeam; 201. Mounting hole; 3. Push handle; 4. Membrane laying unit; 401. Unit frame; 402. Inner frame; 403. First mounting shaft; 404. Second mounting shaft; 405. Roller shaft; 406. Take-up drum; 407. Travel drive wheel; 408. Adjusting screw; 409. Rotating handle; 410. Modular track structure. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are all based on the actual direction of travel when the device lays the geomembrane. They are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Reference Figures 1 to 5 A seepage-proof composite geomembrane laying device for water conservancy projects includes an external support frame system and multiple membrane laying units 4. The external support frame system constitutes the basic load-bearing skeleton of the device, mainly composed of two end plates 1 arranged front and rear and two connecting beams 2 connecting the end plates 1. The end plates 1 are set perpendicular to the laying direction and serve as front and rear enclosure and load-bearing functions; the connecting beams 2 extend along the laying direction and are located on the left and right sides of the device respectively. An arched push handle 3 is installed on the end plate 1 for construction personnel to push and pull or connect to traction machinery to provide power for the device to move along the direction of travel.

[0021] Multiple membrane laying units 4 are installed inside the external support frame system to support the geomembrane and perform the retraction and laying action. The membrane laying units 4 are slidably connected to the end plate 1 or adjacent membrane laying units 4 via a combined track structure 410. The combined track structure 410 is installed on the front and rear sides of the unit frame 401 perpendicular to the laying direction, employing a groove structure or tenon and mortise structure with a concave-convex fit. Adjacent membrane laying units 4 are interlocked with each other via the combined track structure 410, and membrane laying units 4 at the edge positions are interlocked with corresponding tracks on the inner side of the end plate 1 via the combined track structure 410. This track-guided connection method allows the membrane laying units 4 to move smoothly in a straight line perpendicular to the direction of travel when subjected to lateral thrust, while maintaining a fixed structural position in the direction of travel. To reduce frictional resistance during translation, auxiliary guide wheels are also provided below the membrane laying units 4 to assist the unit frame 401 in translating along the combined track structure 410.

[0022] The specific structure of the membrane laying unit 4 includes a unit frame 401, inside which an inner frame 402 is fixedly installed. A first mounting shaft 403 and a second mounting shaft 404 are arranged perpendicular to the laying direction. The ends of the first mounting shaft 403 and the second mounting shaft 404 that are far apart from each other are rotatably connected to two inner sidewalls of the unit frame 401 parallel to the direction of travel via bearings; the ends that are close to each other both penetrate the sidewalls of the inner frame 402 and extend into the interior area of ​​the inner frame 402. Both ends of the roll shaft 405 are connected to the ends of the first mounting shaft 403 and the second mounting shaft 404 that extend into the inner frame 402, respectively. This connection uses a plug-in structure or a coupling structure to achieve a detachable connection. A take-up drum 406 is fitted and fixed to the roll shaft 405, and the geomembrane is wound onto the take-up drum 406. When the geomembrane is exhausted, the construction workers can disconnect the detachable connection between the drum shaft 405 and the first mounting shaft 403 and the second mounting shaft 404, and then remove the drum shaft 405 along with the empty take-up drum 406 from the inner frame 402 for replacement. The two-section support structure that runs through the inner frame 402 provides the take-up drum 406 with multiple coaxial support points when it rotates, preventing shaft bending under heavy loads.

[0023] The driving wheel 407 is mounted on the first mounting shaft 403. The driving wheel 407 is coaxially fixed to the first mounting shaft 403 via a key connection, spline connection, or pin connection. When the device moves along the direction of travel under the traction of the push handle 3, the driving wheel 407 directly contacts the ground and rotates due to friction. Because the driving wheel 407 and the first mounting shaft 403 are rigidly coaxially fixed, the rotation of the driving wheel 407 directly drives the first mounting shaft 403 to rotate, which in turn drives the take-up drum 406 to rotate synchronously via the drum shaft 405. This structure ensures that the linear velocity of the geomembrane released by the take-up drum 406 is mechanically synchronized with the linear velocity of the device's movement, allowing the geomembrane to be actively unloaded and laid flat on the ground, eliminating the tensile stress and surface wrinkles caused by passive pulling during installation.

[0024] Regarding the adjustment mechanism for the laying width and overlapping edges, the connecting beam 2 has multiple mounting holes 201 with internal threads. The side of the membrane laying unit 4 is equipped with an adjusting screw 408, which is perpendicular to the laying direction. One end of the adjusting screw 408 is rotatably connected to the side wall of the unit frame 401, allowing it to rotate in place without relative axial displacement. The rod of the adjusting screw 408 passes through the corresponding mounting hole 201 on the connecting beam 2 and forms a threaded drive engagement with it. A rotating handle 409 is fixedly connected to the end of the adjusting screw 408 away from the unit frame 401. When the operator rotates the rotating handle 409, the adjusting screw 408 rotates, generating a reaction force through the threaded engagement with the mounting hole 201, thereby pushing or pulling the entire membrane laying unit 4 to translate along the combined track structure 410 perpendicular to the travel direction. By operating the rotating handle 409 corresponding to each membrane laying unit 4, the absolute position of each winding drum 406 in the lateral direction can be adjusted independently, thereby accurately setting the edge overlap width of two adjacent geomembranes during laying.

[0025] To handle the overlapping edges of the geomembrane after laying, multiple membrane laying units 4 are arranged in a staggered manner along the laying direction. After adjusting the lateral overlap width, the projection of the driving wheel 407 of the rear membrane laying unit 4 perpendicular to the laying direction covers at least a portion of the geomembrane path laid by the front membrane laying unit 4. During the continuous forward movement of the device, after the front membrane laying unit 4 lays the geomembrane on the ground, the driving wheel 407 of the rear membrane laying unit 4 moves to the top of the front geomembrane, and its wheel surface directly contacts the upper surface of the front geomembrane. Relying on the structural gravity of the device, the rear driving wheel 407 provides synchronous driving power and acts as a rolling mechanism to physically roll and flatten the overlapping edges of the two geomembranes, making them tightly adhere to the base surface, thus completing the continuous operation process of laying and compacting the membrane simultaneously.

[0026] The above description of the embodiments is intended to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A seepage-proof composite geomembrane laying device for water conservancy projects, characterized in that, include: The external support frame system includes end plates (1) arranged at the front and rear and connecting beams (2) that connect the end plates (1) and extend along the direction of travel. Multiple membrane laying units (4) are slidably connected to the end plate (1) or adjacent membrane laying units (4) through a combined track structure (410) to achieve translation perpendicular to the direction of travel; The membrane laying unit (4) includes: a unit frame (401) with an inner frame (402); a first mounting shaft (403) and a second mounting shaft (404) rotatably connected to the side wall of the unit frame (401) and passing through the inner frame (402); a roll shaft (405) with a take-up drum (406) installed and detachably connected at both ends to the first mounting shaft (403) and the second mounting shaft (404) respectively; and a walking drive wheel (407) coaxially fixed on the first mounting shaft (403). Multiple membrane laying units (4) are arranged in a staggered manner, and the projection of the rear walking drive wheel (407) perpendicular to the direction of travel covers at least a portion of the laying path in front.

2. The seepage-proof composite geomembrane laying device for water conservancy projects according to claim 1, characterized in that: The driving wheel (407) is coaxially fixed on the first mounting shaft (403) by any one of key connection, spline connection or pin connection.

3. The seepage-proof composite geomembrane laying device for water conservancy projects according to claim 1, characterized in that: The connecting beam (2) is provided with multiple mounting holes (201). The membrane laying unit (4) also includes an adjusting screw (408) and a rotating handle (409). The adjusting screw (408) is set perpendicular to the laying direction and rotatably connected to the unit frame (401). The adjusting screw (408) passes through the corresponding mounting hole (201) and is threadedly engaged with the mounting hole (201). The rotating handle (409) is set at the end of the adjusting screw (408) away from the unit frame (401) and is used to drive the membrane laying unit (4) to move as a whole to adjust the overlap width of adjacent geomembranes.

4. The seepage-proof composite geomembrane laying device for water conservancy projects according to claim 1, characterized in that: The combined track structure (410) is disposed on the front and rear sides of the unit frame (401) perpendicular to the laying direction. The combined track structure (410) is a groove or tenon structure with a concave-convex fit.

5. The seepage-proof composite geomembrane laying device for water conservancy projects according to claim 1, characterized in that: The drum shaft (405) is detachably connected to the first mounting shaft (403) and the second mounting shaft (404) through a plug-in structure or a coupling structure.

6. The seepage-proof composite geomembrane laying device for water conservancy projects according to claim 1, characterized in that: The driving wheel (407) in the rear membrane laying unit (4) is located above the geomembrane laid by the front membrane laying unit (4), and the wheel surface of the driving wheel (407) is in contact with the upper surface of the geomembrane.

7. The seepage-proof composite geomembrane laying device for water conservancy projects according to claim 1, characterized in that: The external support frame system is also provided with a push handle (3), which is installed on the end plate (1).

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