A method for measuring high-density water depth beside a riprapping ship
Patent Information
- Application Number
- CN202511511441.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-22
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2045-10-22
AI Technical Summary
[0003]传统的抛石水深测量采用水砣测量,精度差、受水流影响大,而且难以测量至船舷外0.5-2.5m的主要要落石区域;采用测量船进行水深测量,与抛石作业互相干扰,及时性差,对抛石作业的现场指导性不强
1、该用于抛石船旁高密度水深测量方法,通过利用绳索拖拽浮体移动,使得浮体具有一定的机动性,在护岸抛石前、抛石后进行水深测量,利用浮体上的测深仪器及时发现可能出现的欠抛或超抛情况,减少欠抛返工或超抛开挖的出现,大幅提高抛石工程施工质量和施工效率。
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Figure CN121475145B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engineering surveying technology, and in particular to a method for high-density water depth measurement next to a quarry. Background Technology
[0002] Riverbank protection projects are crucial to the safety of dikes and the navigation of waterways, and are a key focus of inland river management and water conservancy construction. Inland river riprap revetment is an economical and environmentally friendly method. The revetment riprap uses quarried stone, which is heavy and has good resistance to flood erosion. Considering the water depth of inland rivers, 1000-2000 ton bulk carriers are generally used to transport the stone. Excavators are then used to load the riprap onto the ship. Typically, the excavator loads the riprap 0.5-2.5 meters outside the ship's hull. Considering the impact of drift, the riprap loading area extends from 1 meter inside the ship's hull to 4 meters outside. Water depth measurements are required before and after riprap loading.
[0003] Traditional methods of measuring water depth using boulders are inaccurate, highly susceptible to current fluctuations, and difficult to measure the main rockfall areas 0.5-2.5m beyond the ship's hull. Using survey vessels for water depth measurement interferes with rock-dropping operations, resulting in poor timeliness and limited on-site guidance for the operation. Currently, the main platforms for measurement operations are motorized boats and unmanned vessels, driven by diesel generators or electric motors. Motorized boats offer the advantage of minimal swaying, but suffer from drawbacks such as large draft, high fuel consumption, and large turning radius. Small unmanned vessels are compact, but exhibit significant swaying, and the technology for tilt correction needs improvement. Summary of the Invention
[0004] The purpose of this invention is to solve the problems existing in the prior art and to propose a method for high-density water depth measurement next to a quarry.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A method for high-density water depth measurement alongside a quarry, comprising a buoy, and further comprising: An outer frame, which is square and covers the outside of the float; A steel pipe fence is fixed to the top of the outer frame, and the steel pipe fence and the top of the floating body form a working space. An instrument bracket, which is fixed to one side of the outer frame, is used to place a depth sounding instrument, which is located at one-third of the position on the side of the outer frame. The first traction rope, there are two of them, and they are respectively set at both ends on the side of the outer frame where the instrument bracket is installed; And an extension section, which is located on the side of the outer frame away from the instrument support, for adjusting the distance between the float and the ship's side.
[0006] Preferably, the float comprises a foam body and an iron shell covering the outside of the foam body, the float body has dimensions of 2000mm in length, 2000mm in width, and 300mm in thickness, and the instrument support has a width of 500mm.
[0007] Preferably, the outer frame includes an upper frame and a lower frame welded from angle steel, with connecting angle steel provided between the upper frame and the lower frame. A first baffle is provided on both the upper frame and the lower frame, and a second baffle is fixed on the upper frame. A wooden board is placed between the second baffle and the first baffle, and the wooden board serves as a support surface for the workspace.
[0008] Preferably, the depth sounding instrument includes a single-beam depth sounder and a GNSS locator mounted on the single-beam depth sounder, wherein the GNSS locator and the single-beam depth sounder are connected to the integrated depth sounding and positioning machine via a cable.
[0009] Preferably, a sleeve for placing the depth sounding rod of a single-beam echo sounder is fixed on the steel pipe fence. A fastening bolt that moves against the depth sounding rod is threaded onto the sleeve. An auxiliary rod is provided between the steel pipe fence and the outer frame. The lower side of the auxiliary rod is connected to the depth sounding rod of the single-beam echo sounder by a strap.
[0010] Preferably, the extension includes an adjusting plate fixed to the outer frame, a hinge frame movably connected to the adjusting plate, and a movable plate connected to the end of the hinge frame away from the adjusting plate, wherein the movable plate moves against the hull.
[0011] Preferably, the hinge frame includes two hinge plates rotatably connected by a pin. Each hinge plate has a first slider and a second slider at both ends. The adjusting plate has a first groove for sliding the first slider, and the movable plate has a second groove for sliding the second slider. The two second sliders are also provided with second pull ropes.
[0012] Preferably, the distance between the adjusting plate and the movable plate after swinging through the hinge frame varies from 500mm to 1500mm.
[0013] Preferably, both the movable plate and the outer side of the outer frame are provided with anti-collision parts, which are either rubber blocks or sandbags.
[0014] It also includes the following steps: S1: After the stone transport ship enters the stone dumping construction position, it anchors and positions itself. The floating body is launched into the water at the shore. A small boat is used to pull the floating body to the side of the stone transport ship. GNSS positioning instruments and single-beam depth sounders are installed on the outer frame and steel pipe fence of the floating body. S2: Staff members on the ship use two first traction ropes to drag the outer frame to carry out measurement work, measuring a position 2m away from the hull; When it is necessary to measure a position 0.5m or 1.5m away from the hull, the staff only need to pull the first traction rope on one side to rotate the float relative to the hull. When it is necessary to measure a position 2.5m or 3.5m away from the hull, the side of the outer frame where the instrument bracket is mounted is arranged parallel to the side of the hull. Then, the staff applies force to the second traction rope, causing the articulated frame to swing, thereby adjusting the distance between the float and the hull, and thus adjusting the measurement position of the depth sounding instrument. This allows the platform to measure four survey lines at distances of 0.5m, 1.5m, 2.5m, and 3.5m from the ship's outer side. S3: After the measurement work before rock throwing is completed, the float is tied to the side of the hull with the first pulling rope. Measurement is carried out after rock throwing. During and after rock throwing, the collected measurement data is further processed and analyzed to provide timely guidance for the excavator rock throwing operation. S4: After the single-ship rock dumping is completed, the buoy is towed back to the shore. Combining the design drawings and pre-dredging measurement drawings, the amount of silt squeezed by the single ship is determined. Multiple measurement data are integrated to determine the overall project progress, overall quality, and overall cost control.
[0015] Compared with the prior art, the present invention provides a method for high-density water depth measurement next to a quarry, which has the following advantages: 1. This method for high-density water depth measurement alongside rock-dropping vessels utilizes ropes to tow a floating body, giving it a certain degree of maneuverability. Water depth measurements are conducted before and after rock-dropping on the revetment. The depth sounding instruments on the floating body promptly detect potential under-dropping or over-dropping situations, reducing rework due to under-dropping or excavation due to over-dropping, and significantly improving the construction quality and efficiency of rock-dropping projects.
[0016] 2. This method for high-density water depth measurement near stone-throwing vessels involves mounting the depth sounding instrument on an instrument bracket on the outer frame, with a distance of 0.5m from one side line and 1.5m from the other side line. The outer frame also has an extension section that can extend 1.5m, allowing the instrument's measurement position to be adjusted between 0.5m, 1.5m, 2.5m, and 3.5m. This enables measurement of 1m spacing lines, achieving an effect close to multibeam bath measurement and improving measurement efficiency.
[0017] 3. This method for high-density water depth measurement near stone-throwing vessels prevents damage to the foam body during transportation and construction by setting an iron shell and outer frame on the outside of the foam body, thus ensuring its service life. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the external structure of the outer frame of the present invention. Figure 1; Figure 3 This is a schematic diagram of the external structure of the outer frame of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the outer frame of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the float of the present invention; Figure 6 This is a schematic diagram of the structure of the extension part of the present invention; Figure 7 This is a schematic diagram of the high-density wiring with a 1m spacing for the depth sounding instrument of the present invention.
[0019] In the diagram: 1. Float; 101. Foam body; 102. Sheet metal shell; 2. Outer frame; 201. Upper frame; 202. Lower frame; 203. Connecting angle steel; 204. First baffle; 205. Second baffle; 206. Wooden board; 3. Steel pipe fence; 4. Instrument support; 5. First traction rope; 6. Adjustable distance plate; 601. Hinge frame; 6011. Hinge plate; 6012. First slider; 6013. Second slider; 602. Movable plate; 603. First chute; 604. Second chute; 605. Second traction rope; 7. Depth sounding instrument; 701. Single beam depth sounder; 702. GNSS locator; 8. Sleeve; 801. Fastening bolt; 9. Auxiliary rod; 10. Collision protection. Detailed Implementation
[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0021] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0023] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, this embodiment proposes a method for high-density water depth measurement alongside a quarry, including a float 1. The float 1 includes a foam body 101 and a sheet metal shell 102 covering the outside of the foam body 101, providing stable buoyancy and preventing damage during transportation. The float 1 has dimensions of 2000mm in length, 2000mm in width, and 300mm in thickness. It also includes an outer frame 2, a steel pipe fence 3, an instrument support 4, a first pulling rope 5, and an extension section. The outer frame 2 is square and covers the outside of the float 1. The steel pipe fence 3 is fixed to the top of the outer frame 2, forming an I-shaped structure with the top of the float 1. The system provides ample space to ensure operational safety and creates a lightweight measurement platform that facilitates personnel work. An instrument bracket 4 is fixed to one side of the outer frame 2 to hold a depth sounding instrument 7, which is positioned at one-third of the distance from the side edge of the outer frame 2 (500mm from one edge and 1500mm from the other). Two first pulling ropes 5 are provided, located at opposite ends of the side of the outer frame 2 where the instrument bracket 4 is mounted. An extension section is located on the side of the outer frame 2 away from the instrument bracket 4, used to adjust the distance between the float 1 and the ship's side. The instrument bracket 4, with a width of 500mm, can accommodate various types of equipment. In practice, the platform is launched from the shore and towed by a small boat to the anchor position next to the rock-dropping vessel. The operator adjusts the distance between the float 1 and the ship's side using the first traction rope 5. The float 1 and the outer frame 2 can be rotated by pulling only one side of the first traction rope 5, so that the distance between the working platform and the ship's side can be adjusted from 0.5m to 2m. This allows for the collection of water depth data from multiple survey lines, real-time observation of elevation changes before and after rock-dropping, and guidance for the excavator to correct the rock-dropping position. The manual towing of the platform can avoid conflicts with the rock-dropping operation, giving the platform a certain degree of mobility, improving the real-time nature of construction, and timely detection of possible under-dropping or over-dropping situations, reducing the occurrence of rework for under-dropping or over-dropping excavation, and significantly improving the construction quality and efficiency of the rock-dropping project. Moreover, the structure of foam float 1 + steel pipe fence 3 has low cost, requires no power drive, and reduces energy consumption and maintenance requirements. It should be noted that, in order to further improve the depth measuring range of the depth sounding instrument 7, the extension part includes an adjusting plate 6 fixed on the outer frame 2, a hinge frame 601 movably connected to the adjusting plate 6, and a movable plate 602 connected to the end of the hinge frame 601 away from the adjusting plate 6. The movable plate 602 moves against the hull. The hinge frame 601 includes two hinge plates 6011 rotatably connected by a pin. Each hinge plate 6011 has a first slider 6012 and a second slider 6013 at both ends. The adjusting plate 6 has a first groove 603 for sliding the first slider 6012, and the movable plate 602 has a second groove 604 for sliding the second slider 6013. The two second sliders 6013 are also provided with second traction ropes 605. The distance between the adjusting plate 6 and the movable plate 602 after swinging through the hinge frame 601 varies from 500mm to 1500mm. Specifically, when measurements are required at a distance of 2.5m or 3.5m from the hull, the side of the outer frame 2 where the instrument bracket 4 is mounted is arranged parallel to the side of the hull. Then, the operator applies force to the second traction rope 605, causing the hinge frame 601 to swing and the two hinge plates 6011 to rotate relative to each other. This causes the two first sliders 6012 and the two second sliders 6013 to move closer together, thereby adjusting the distance between the float 1 and the hull. This, in turn, adjusts the measurement position of the depth sounding instrument 7, allowing the platform to measure four measurement lines at distances of 0.5m, 1.5m, 2.5m, and 3.5m from the hull, achieving a measurement of measurement lines with a 1m spacing, approaching the effect of multibeam echo sounding and improving measurement efficiency.
[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in a preferred embodiment, based on the above method, the outer frame 2 further includes an upper frame 201 and a lower frame 202 welded from angle steel. A connecting angle steel 203 is provided between the upper frame 201 and the lower frame 202. A first baffle 204 is provided on both the upper frame 201 and the lower frame 202. A second baffle 205 is also fixed on the upper frame 201. A wooden board 206 is placed between the second baffle 205 and the first baffle 204. The wooden board 206 serves as a support surface for the workspace. A double-layer frame structure is formed by welding angle steel. The upper frame 201... The lower frame 202 is fixed to the upper frame 201 by vertical connecting angle steel 203 to form a three-dimensional support system. The first baffle 204 is horizontally welded to the inner side of the frame to enhance the torsional stiffness of the frame and limit the displacement of the float 1. The second baffle 205 is parallel to the first baffle 204 and welded to the upper frame 201 to form a sandwich space. The wooden board 206 is embedded in it as a detachable support surface. The wooden board 206 is made of anti-corrosion pine wood, and its size matches the inner distance of the frame. A 10mm expansion joint is reserved at the edge. The wooden board 206 serves as an operating table to bear the weight of the depth sounding instrument 7 and personnel, and is limited by the baffle to prevent slippage.
[0025] like Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, the depth sounding instrument 7 further includes a single-beam depth sounder 701 and a GNSS locator 702 mounted on the single-beam depth sounder 701. The GNSS locator 702 and the single-beam depth sounder 701 are connected to the integrated depth sounding and positioning machine via a cable. By installing the single-beam depth sounder 701 and the GNSS locator 702 and using data acquisition and data processing, high-density and accurate water depth measurement can be achieved within 4 meters of the ship. This is suitable for projects with high requirements for water depth measurement density and quality, such as inland river riprap revetment.
[0026] like Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, a sleeve 8 for placing the depth measuring rod of the single-beam depth sounder 701 is further fixed on the steel pipe fence 3. A fastening bolt 801 that abuts against the depth measuring rod is threaded onto the sleeve 8. An auxiliary rod 9 is provided between the steel pipe fence 3 and the outer frame 2. The lower side of the auxiliary rod 9 is connected to the depth measuring rod of the single-beam depth sounder 701 by a strap. Placing the depth measuring rod in the sleeve 8 facilitates limiting the depth measuring rod, and the fastening bolt 801 abuts the depth measuring rod in the sleeve 8, which improves the stability of the installation of the single-beam depth sounder 701 and ensures the accuracy of the measurement results. At the same time, the lower end of the depth measuring rod is fixed to the auxiliary rod 9 by a strap, further improving the stability of the installation of the depth measuring instrument 7.
[0027] like Figure 1 As shown, in a preferred embodiment, based on the above method, both the movable plate 602 and the outer frame 2 are further provided with anti-collision parts 10, which are either rubber blocks or sandbags. By providing rubber blocks or sandbags on the outer sides of the movable plate 602 and the outer frame 2, the lightweight measuring platform can abut against the ship's side through the anti-collision parts 10 under the pull of the first pull rope 5 or the second pull rope 605, thereby reducing the collision force between the lightweight measuring platform and the ship's hull, avoiding damage to it, and thus reducing its maintenance costs.
[0028] Includes the following steps: S1: After the stone transport ship enters the stone dumping construction position, it anchors and positions itself. The floating body 1 is launched into the water at the shore. A small boat is used to pull the floating body 1 to the side of the stone transport ship. A GNSS positioning instrument 702 and a single-beam depth sounder 701 are installed on the outer frame 2 and steel pipe fence 3 of the floating body 1. S2: Staff members on the ship use two first traction ropes 5 to drag the outer frame 2 to carry out measurement work, measuring a position 2m away from the hull; When it is necessary to measure a position 0.5m or 1.5m away from the hull, the staff only need to pull the first traction rope 5 on one side to make the float 1 rotate relative to the hull. When it is necessary to measure a position 2.5m or 3.5m away from the hull, the side of the outer frame 2 where the instrument bracket 4 is installed is arranged parallel to the side of the hull. Then, the staff applies force to the second traction rope 605, causing the articulated frame 601 to swing, thereby adjusting the distance between the float 1 and the hull, and thus adjusting the measurement position of the depth sounding instrument 7. This allows the platform to measure four survey lines at distances of 0.5m, 1.5m, 2.5m, and 3.5m from the ship's outer side. S3: After the measurement work before rock throwing is completed, the float 1 is tied to the side of the ship with the first pulling rope 5. The measurement is carried out after the rock is thrown. During and after the rock throwing process, the collected measurement data is further processed and analyzed to analyze the elevation changes before and after the rock throwing, and to guide the excavator rock throwing operation in a timely manner. S4: After the single-ship rock dumping is completed, buoy 1 is towed back to the shore. Combining the design drawings and pre-dredging measurement drawings, the amount of silt squeezed by the single ship is determined. Multiple measurement data are integrated to determine the overall project progress, overall quality, and overall cost control.
[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A method for high-density water depth measurement near a quarry, the method being based on a high-density water depth measurement device for quarrying vessels, the device comprising a float (1), characterized in that, Also includes: The outer frame (2) is square and covers the outside of the float (1); Steel pipe fence (3), the steel pipe fence (3) is fixed on the top of the outer frame (2), and the steel pipe fence (3) and the top of the float (1) form a working space; Instrument bracket (4), which is fixed on one side of the outer frame (2) and is used to place the depth measuring instrument (7), which is located at one-third of the position of the side of the outer frame (2). The first traction rope (5) has two parts, and is respectively set at both ends of the outer frame (2) on the side where the instrument bracket (4) is installed; And an extension section, which is located on the side of the outer frame (2) away from the instrument bracket (4) for adjusting the distance between the float (1) and the ship's side; The extension includes an adjusting plate (6) fixed on the outer frame (2), a hinge frame (601) movably connected to the adjusting plate (6), and a movable plate (602) connected to the end of the hinge frame (601) away from the adjusting plate (6), wherein the movable plate (602) moves against the hull. The hinge frame (601) includes two hinge plates (6011) rotatably connected by a pin. Each hinge plate (6011) has a first slider (6012) and a second slider (6013) at both ends. The adjusting plate (6) has a first groove (603) for sliding the first slider (6012). The movable plate (602) has a second groove (604) for sliding the second slider (6013). The two second sliders (6013) are also provided with second pull ropes (605). The depth sounding instrument (7) includes a single-beam depth sounder (701) and a GNSS locator (702) mounted on the single-beam depth sounder (701). The method includes the following steps: S1: After the stone transport ship enters the stone dumping construction position, it anchors and positions itself. The floating body (1) is launched into the water at the shore. A small boat is used to pull the floating body (1) to the side of the stone transport ship. GNSS positioning instrument (702) and single beam depth sounder (701) are installed on the outer frame (2) and steel pipe fence (3) of the floating body (1). S2: The staff on the ship use two first traction ropes (5) to drag the outer frame (2) to carry out the measurement work and measure the position 2m away from the ship. When it is necessary to measure a position 0.5m or 1.5m away from the hull, the staff only need to pull the first traction rope (5) on one side to make the float (1) rotate relative to the hull; When it is necessary to measure a position 2.5m or 3.5m away from the hull, the side of the outer frame (2) where the instrument bracket (4) is installed is arranged parallel to the side of the hull. Then, the staff applies force to the second traction rope (605) to make the hinge frame (601) swing, thereby adjusting the distance between the float (1) and the hull, and thus adjusting the measurement position of the depth sounding instrument (7). This allows the platform to measure four survey lines at distances of 0.5m, 1.5m, 2.5m, and 3.5m from the ship's outer side. S3: After the measurement work before throwing the stone is completed, the float (1) is tied to the side of the ship with the first pulling rope (5). The measurement is carried out after the stone is thrown. During and after the stone is thrown, the collected measurement data is sorted out and the elevation changes before and after the stone is thrown are analyzed to guide the excavator stone throwing operation in a timely manner. S4: After the single boat has finished dumping rocks, the floating body (1) is towed back to the shore. Combined with the design drawings and the pre-dredging measurement drawings, the amount of silt squeezed by the single boat is determined. Multiple measurement data are integrated to determine the overall project progress, overall quality and overall cost control.
2. The method for high-density water depth measurement beside a quarry as described in claim 1, characterized in that, The float (1) includes a foam body (101) and an iron shell (102) covering the outside of the foam body (101). The float (1) has a length of 2000 mm, a width of 2000 mm, and a thickness of 300 mm. The instrument support (4) has a width of 500 mm.
3. The method for high-density water depth measurement beside a stone-throwing vessel according to claim 2, characterized in that, The outer frame (2) includes an upper frame (201) and a lower frame (202) welded from angle steel. A connecting angle steel (203) is provided between the upper frame (201) and the lower frame (202). A first baffle (204) is provided on both the upper frame (201) and the lower frame (202). A second baffle (205) is also fixed on the upper frame (201). A wooden board (206) is placed between the second baffle (205) and the first baffle (204). The wooden board (206) is used as a support surface for the workspace.
4. The method for high-density water depth measurement beside a quarry as described in claim 2, characterized in that, The GNSS locator (702) and the single-beam depth sounder (701) are connected to the depth sounding and positioning integrated machine via cables.
5. A method for high-density water depth measurement beside a quarry as described in claim 4, characterized in that, The steel pipe fence (3) is fixed with a sleeve (8) for placing the depth measuring rod of the single beam depth sounder (701). The sleeve (8) is threaded with a fastening bolt (801) that moves against the depth measuring rod. An auxiliary rod (9) is provided between the steel pipe fence (3) and the outer frame (2). The lower side of the auxiliary rod (9) is connected to the depth measuring rod of the single beam depth sounder (701) by a strap.
6. A method for high-density water depth measurement beside a quarry as described in claim 5, characterized in that, The distance between the adjusting plate (6) and the movable plate (602) after swinging through the hinge frame (601) varies from 500mm to 1500mm.
7. A method for high-density water depth measurement beside a quarry as described in claim 6, characterized in that, Both the movable plate (602) and the outer frame (2) are provided with anti-collision parts (10), which are either rubber blocks or sandbags.
Citation Information
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