Water filtering and sand locking sand conveying assembly and sand loading device and method

Abstract

The invention relates to the technical field of membrane bag sand filling construction, in particular to a sand conveying assembly capable of filtering water and locking sand and a sand filling device and method. The supporting body is arranged on the outer side of the fluid conveying pipe in a sleeving mode and used for opening the film bag so that a water drainage channel can be formed between the outer side wall of the fluid conveying pipe and the inner wall of the film bag; and the filtering structure is used for being arranged on the water drainage channel and can block sand grains from passing through. According to the sand conveying assembly capable of filtering water and locking sand, redundant water in a water-sand mixture flowing into the film bag along the flow conveying flow channel can be discharged along the water drainage channel, sand grains are blocked by the filtering structure and left in the film bag, the water filtering and sand locking functions are achieved, and therefore staged standing waiting in the sand loading process can be greatly reduced or even eliminated, and the sand loading efficiency is improved. And the sand loading efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of membrane bag sand construction technology, and in particular to a sand conveying component, sand loading device and method for filtering and locking sand. Background Technology

[0002] Membrane bag sand filling technology is a construction technique widely used in water conservancy projects, port construction, cofferdam construction and other fields. Its core lies in using membrane bags made of geotextiles as containers, and filling them with sand (gravel) or other materials to form sandbags with certain strength and stability. It can be used for interception, diversion and foundation reinforcement in complex geological conditions such as soft foundations, silty coasts and deep water environments. It has the advantages of fast construction speed, low cost, environmental protection and strong adaptability.

[0003] In existing technologies, when traditional mud pump boats or large water machinery cannot be brought to the site and membrane bag sand filling construction can only be carried out on land, workers often use manual filling or mud pumps to transport sand particles. When using manual filling, workers manually fill the membrane bags with sand particles while simultaneously using water pipes to continuously flush water into the membrane bags to fill the sand particles to the bottom of the membrane bags. The amount of sand transported manually and the amount of water used for filling rely entirely on the experience of the workers, resulting in low overall construction efficiency. When using mud pumps to transport sand particles, the sand-containing water pumped out by the mud pump usually has a low sand concentration. To prevent excessive sand-containing water from overflowing from the membrane bag during pumping, the construction process requires periodic settling to allow the sand particles in the membrane bags to settle before continuing construction, which also results in low construction efficiency. Summary of the Invention

[0004] This invention provides a sand conveying component, sand loading device, and method for filtering and locking sand, which aims to at least partially solve the problem of low sand loading efficiency in membrane bags mentioned in the background art.

[0005] In a first aspect, the present invention provides a sand conveying assembly for filtering and locking sand, comprising:

[0006] The flow pipe has an internal flow channel; A support body is fitted onto the outside of the infusion pipe. The support body is used to expand the membrane bag to form a drainage channel between the outer wall of the infusion pipe and the inner wall of the membrane bag. A filter structure is provided in the drainage channel, and the filter structure is capable of blocking sand particles from passing through.

[0007] In some embodiments, the support body has a hollow structure, and the filter structure is disposed in the hollow structure.

[0008] In some embodiments, the drainage channel extends along the length of the delivery pipe.

[0009] In some embodiments, the support includes a support ring, which is connected to the inlet pipe via a connecting assembly.

[0010] In some embodiments, the filtration structure is a permeable geotextile.

[0011] In a second aspect, the present invention provides a sand loading device, including a water-sand agitator, a drive assembly, and a sand conveying assembly for filtering and locking sand as described above. The water-sand agitator includes a mixing chamber and a mixing element. The mixing chamber is provided with an output port. One end of the conveying pipe is connected to the output port. The drive assembly is used to drive the mixing element to rotate within the mixing chamber.

[0012] In some embodiments, the water-sand mixer is a horizontal mixer, and the mixing element is a double-spiral cutter.

[0013] In some embodiments, the stirring chamber is provided with at least two flow stabilizing structures, which divide the stirring chamber into a front chamber, a middle chamber and a rear chamber arranged longitudinally in sequence. At least a portion of the stirring element is located in the middle chamber. The front chamber is provided with a water inlet, the middle chamber is provided with a sand inlet, and the output port is located in the rear chamber.

[0014] In some embodiments, the current stabilizing structure includes a plate having a plurality of through holes.

[0015] In some embodiments, the drive assembly includes a water turbine, the rotor of which is connected to the agitator to drive the agitator to rotate; the water turbine is provided with a tailrace pipe that communicates with the agitator chamber.

[0016] In some embodiments, the system further includes a water tank and an inlet pipe, the water tank being connected to the water inlet of the water turbine via the inlet pipe.

[0017] In some embodiments, the height of the inlet pipe connecting the water inlet pipe to the water tank is higher than the height of the inlet pipe connecting the water inlet pipe to the water turbine.

[0018] In some embodiments, the water inlet pipe includes a main pipe, a first branch pipe, and a second branch pipe connected together. The main pipe is connected to the water tank, the first branch pipe is connected to the water inlet of the water turbine, and the second branch pipe is connected to the stirring chamber. A first water valve is provided on the main pipe, and a second water valve is provided on the second branch pipe.

[0019] In some embodiments, the water tank is provided with a partition that divides the water storage chamber of the water tank into a first chamber and a second chamber, the top of the partition being lower than the top of the water storage chamber; it also includes a water injection assembly for injecting water into the second chamber, and the water inlet pipe being connected to the first chamber.

[0020] In some embodiments, the height of the inlet of the water inlet pipe connected to the water tank is H1, and the height of the inlet of the water inlet pipe connected to the water inlet of the water turbine is H2, wherein H1-H2≥2 meters.

[0021] In a third aspect, the present invention provides a sand loading method using the sand loading device described above, comprising the following steps: The infusion tube is inserted into the membrane bag from the bag opening, and the support body is used to open the membrane bag; Water is added to the water tank, and the water flow drives the rotor of the water turbine to rotate, thereby driving the agitator to rotate.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The sand conveying assembly for water filtration and sand locking provided by this invention has a conveying pipe channel that can be used to convey a water-sand mixture. The water in the water-sand mixture can act as a carrier to move the sand particles. The conveying pipe can extend into the membrane bag from the bag opening. By sleeved with a support body on the outside of the conveying pipe, the support body opens the membrane bag to form a drainage channel between the outer wall of the conveying pipe and the inner wall of the membrane bag. A filter structure is set on the drainage channel to block the sand particles from passing through. This allows excess water in the water-sand mixture flowing into the membrane bag along the conveying pipe to be discharged along the drainage channel, while the sand particles are blocked by the filter structure and remain in the membrane bag, thus realizing the water filtration and sand locking function. This can greatly reduce or even eliminate the staged static waiting during the sand loading process and improve the sand loading efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the sand loading device described in an embodiment of the present invention. Figure 1 .

[0024] Figure 2 This is a schematic diagram of the sand conveying assembly described in an embodiment of the present invention. Figure 1 .

[0025] Figure 3 This is a schematic diagram of the sand conveying assembly described in an embodiment of the present invention. Figure 2 .

[0026] Figure 4 This is a top view of the water-sand mixer described in an embodiment of the present invention (top plate omitted).

[0027] Figure 5 This is a schematic diagram of the sand loading device described in an embodiment of the present invention. Figure 2 .

[0028] Figure 6 This is a schematic diagram of the sand loading device described in an embodiment of the present invention. Figure 3 .

[0029] Figure 7This is an exploded view of the structure of the water-sand mixer and water turbine described in an embodiment of the present invention.

[0030] Figure 8 This is a cross-sectional schematic diagram of the water tank and water delivery pipe according to an embodiment of the present invention.

[0031] Marked in the image: 1-Transmission tube; 2-Support body; 21-Connecting components; 3-Filter structure; 4-Water-sand mixer; 41-Stirring chamber; 411-Front chamber; 412-Middle chamber; 413-Rear chamber; 42 - Agitator; 43 - Output port; 44-Stable current structure; 45-water inlet; 46-Sand filling port; 5-Water turbine; 51-Tailpipe; 6-Water tank; 61-Partition; 62-First chamber; 621-Outlet; 63-Second chamber; 631-Drain outlet; 632-Drain pipe; 633-Third water valve; 64 - Water supply pipe; 65 - Water pump; 7-Inlet pipe; 71-Main pipe; 711-First water valve; 72-First branch pipe; 73-Second branch pipe; 731-Second water valve. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0033] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0034] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0035] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0036] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0037] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0038] In existing technologies, when traditional mud pump boats or large water machinery cannot be brought to the site and membrane bag sand filling construction can only be carried out on land, workers often use manual filling or mud pumps to transport sand particles. When using manual filling, workers manually fill the membrane bags with sand particles while simultaneously using water pipes to continuously flush water into the membrane bags to fill the sand particles to the bottom of the membrane bags. The amount of sand transported manually and the amount of water used for filling rely entirely on the experience of the workers, resulting in low overall construction efficiency. When using mud pumps to transport sand particles, the sand-containing water pumped out by the mud pump usually has a low sand concentration. To prevent excessive sand-containing water from overflowing from the membrane bag during pumping, the construction process requires periodic settling to allow the sand particles in the membrane bags to settle before continuing construction, which also results in low construction efficiency.

[0039] A membrane bag is the body of a sandbag. It can be a bag-shaped structure made of geotextile. The bag wall has pores to allow water to pass through, but the size of these pores is small to prevent sand particles from passing through, allowing water to flow through at a low flow rate. Therefore, when the water content in the water-sand mixture is high and the sand content is low, the water entering the membrane bag cannot be discharged from the bag wall in time. In the prior art, a phased static waiting method is used to wait for the water to be discharged, which results in low sand loading efficiency.

[0040] The present invention will now be described with reference to the accompanying drawings and specific embodiments.

[0041] The first aspect of the present invention provides a sand conveying assembly for filtering and locking sand, which aims to improve the efficiency of sand packed in membrane bags.

[0042] Combination Figure 2 and Figure 3 The sand conveying assembly includes a conveying pipe 1, a support body 2, and a filter structure 3. The support body 2 is sleeved on the outside of the conveying pipe 1 and is used to expand the membrane bag to form a drainage channel between the outer wall of the conveying pipe 1 and the inner wall of the membrane bag. The filter structure 3 is installed in the drainage channel and can block sand particles from passing through.

[0043] In the above structure, excess water in the water-sand mixture flowing into the membrane bag along the conveying channel can be discharged along the drain channel, while the sand particles are blocked by the filter structure 3 and remain in the membrane bag, realizing the function of filtering water and locking sand. This can greatly reduce or even eliminate the staged waiting time in the sand loading process and improve the sand loading efficiency.

[0044] The conveying pipe 1 can be a hollow tubular structure, with its internal cavity serving as a conveying channel for transporting a water-sand mixture. This mixture can include water and sand particles, with water acting as a carrier to move the sand particles. Compared to directly filling with dry or low-moisture sand, using water as a flow carrier significantly reduces the difficulty of transporting sand particles and ensuring they fill to the bottom of the membrane bag. When the water-sand mixture is filled into the membrane bag at a certain rate, the bag body is expanded, allowing the mixture to fully fill the internal space, effectively preventing gaps caused by bag folding that would prevent complete filling. The body of the conveying pipe 1 can be made of rigid or flexible material. The opening of the conveying pipe 1 is smaller than the opening of the membrane bag, allowing the pipe 1 to extend into the bag from the opening, thereby conveying the water-sand mixture into the membrane bag.

[0045] For example, combined Figure 2 and Figure 3 The conveying pipe 1 can be a circular pipe. Circular pipes have lower flow resistance, which can improve the flow efficiency of water-sand mixtures. When the fluid flows in the circular pipe, the pressure generated on the pipe wall can be evenly distributed to the pipe wall, which can reduce the probability of the conveying pipe 1 breaking.

[0046] The support 2 is a structure fitted on the outside of the conveying pipe 1 to expand the membrane bag. Expanding the membrane bag specifically means spreading the bag opening or the bag body so that the outer wall of the conveying pipe 1 is separated from the inner wall of the membrane bag, so as to form a drainage channel between the outer wall of the conveying pipe 1 and the inner wall of the membrane bag. The drainage channel allows water in the water-sand mixture to pass through. In order to reduce or prevent sand particles from flowing out of the membrane bag along the drainage channel, the drainage channel is provided with a filter structure 3. The filter structure 3 can block sand particles from passing through, but allows water to flow through.

[0047] It is understandable that, due to the size of the pores on the filter structure 3, finer sand particles may pass through the filter structure 3, but this will not affect the normal functioning of the present invention, because the membrane bag also has several pores on its body. The normal use of the sand bag does not depend on finer sand particles, as long as enough large sand particles are retained inside the membrane bag.

[0048] Optionally, the drain channel extends along the length of the conveying pipe 1, that is, the direction of the drain channel is parallel or approximately parallel to the length of the conveying pipe 1, so that when the conveying pipe 1 extends into the interior of the membrane bag from the bag opening, the water liquid that fills the membrane bag from the extended pipe opening can be discharged through the drain channel and then from the bag opening of the membrane bag.

[0049] In some embodiments, the support body 2 is provided with a hollow structure, and the filter structure 3 is provided in the hollow structure. In this way, the support body 2 and / or the inlet pipe 1 can be used to fix and connect the filter structure 3, so that the inlet pipe 1, the support body 2 and the filter structure 3 become a connected whole. In use, it is only necessary to insert the inlet pipe 1 and the support body 2 into the membrane bag together, which greatly reduces the difficulty of operation and improves the construction efficiency.

[0050] The support 2 can have various shapes, and in this embodiment, it is preferably an annular shape. The annular support 2 has a circumferential outer wall, which can better fit the inner wall of the stretched membrane bag, reduce the gap between the outer wall of the support 2 and the inner wall of the membrane bag, and make most or all of the drainage channel located between the outer wall of the support 2 and the outer wall of the conveying pipe 1. For the drainage channel located between the outer wall of the support 2 and the outer wall of the conveying pipe 1, the two opposite sides of the filter structure 3 set therein can be fixed by the support 2 and the conveying pipe 1 respectively, so as to maintain the position and shape fixed during water flow impact.

[0051] Combination Figure 2 and Figure 3 The support body 2 may include a support ring, the diameter of which is larger than the diameter of the outer wall of the inlet pipe 1. The support ring is connected to the inlet pipe 1 through a connecting assembly 21. The support ring forms the outer wall of the support body 2. The connecting assembly 21 is used to fix the support ring and the inlet pipe 1 together. Several hollow structures as described above are formed between the support ring and the inlet pipe 1. The filter structure 3 can cover these hollow structures.

[0052] The support ring can be a metal ring, and the connecting assembly 21 can include a fixed ring and several metal connecting rods. The fixed ring is fitted against the outside of the delivery pipe 1, and one end of each metal connecting rod is connected to the fixed ring, and the other end is connected to the support ring. For example, as shown... Figure 2 As shown, there are four metal connecting rods evenly distributed around the circumference.

[0053] In some embodiments, the filter structure 3 is a permeable geotextile. The core characteristic of permeable geotextile is that it is permeable to water but impermeable to sand, that is, it allows water to pass through smoothly while effectively intercepting and isolating sand particles. Depending on the manufacturing material, permeable geotextiles can be divided into non-woven geotextiles, woven geotextiles, composite geotextiles, etc. The permeable geotextile can be closed and covered by the perforated structure described above. The permeable geotextile can be connected to the support body 2 and the conveying pipe 1 by pressure strips or clamps.

[0054] In some embodiments, the size of the outer wall of the support 2 is configured to be slightly larger than the opening or body of the membrane bag, so that the membrane bag can be tightly fitted onto the outer wall of the support 2 by utilizing the flexibility of the membrane bag body. At this time, the outer wall of the support 2 abuts against the inner wall of the membrane bag, which can not only reduce the gap between the two to reduce or avoid the leakage of sand particles from this point, but also provide support for the relative fixation of the membrane bag and the support 2, reducing the difficulty of personnel supporting the membrane bag, or even eliminating the need for personnel to support the membrane bag.

[0055] In some embodiments, combined with Figure 2 and Figure 3 At least two supports 2 are arranged at intervals along the length of the conveying pipe 1. The multiple supports 2 cooperate with each other to better expand the membrane bag with a certain depth. For example, at least one support 2 is set at the front end of the conveying pipe 1 and at least one support 2 is set at the rear end of the conveying pipe 1. During the sand filling process, the membrane bag can be simultaneously placed on the supports 2 at the front end and the rear end of the conveying pipe 1. As the amount of sand particles filled into the membrane bag increases, the membrane bag gradually moves away from the conveying pipe 1 so that the conveying pipe 1 can be removed. The support 2 set at the rear end of the conveying pipe 1 can still expand the membrane bag. The support 2 set at the rear end of the conveying pipe 1 plays the role of expanding the membrane bag during most of the sand filling period.

[0056] Optionally, multiple supports 2 arranged at intervals along the length of the conveying pipe 1 are connected by a connecting assembly to maintain their relative positions. For example, the connecting assembly includes a plurality of circumferentially arranged connecting rods, which are fixedly connected to a connecting assembly 21 between the supports 2 and the conveying pipe 1. Figure 2 The metal connecting rod shown.

[0057] A second aspect of the present invention provides a sand loading device, including a sand conveying assembly for filtering and locking sand as described above.

[0058] In some embodiments, combined with Figure 1 The sand loading device also includes a water-sand mixer 4 and a drive assembly. The water-sand mixer 4 includes a mixing chamber 41 and a mixing element 42. The mixing chamber 41 is provided with an output port 43. One end of the conveying pipe 1 is connected to the output port 43. The drive assembly is used to drive the mixing element 42 to rotate in the mixing chamber 41.

[0059] In the above structure, water and sand can be added to the mixing chamber 41, and the stirring component 42 is driven to rotate by the driving component to stir and obtain a water-sand mixture. The water-sand mixture enters the conveying channel of the conveying pipe 1 from the outlet 43, flows along the conveying channel and flows out from the other end of the conveying pipe 1. When in use, the other end of the conveying pipe 1 is inserted into the membrane bag so that the water-sand mixture flows into the membrane bag.

[0060] The drive component can be a motor or other device that can drive the agitator 42 to rotate.

[0061] In some embodiments, combined with Figure 1 , Figure 5 , Figure 6 and Figure 7 The water-sand mixer 4 is a horizontal mixer, and the mixing component 42 is a double spiral cutter, which is arranged longitudinally along the mixing chamber 41.

[0062] Furthermore, the lower part of the water-sand mixer 4 has a semi-cylindrical structure.

[0063] The horizontal mixer combined with the double spiral cutter provides higher mixing uniformity, enabling materials to move simultaneously in the radial and axial directions, forming a triple mixing effect of convection, shearing and diffusion. In addition, setting the bottom of the water-sand mixer 4 as a semi-cylindrical structure can reduce dead corners and further improve mixing uniformity.

[0064] For example, the upper part of the water-sand mixer 4 is a rectangular structure. The outer shell of the water-sand mixer 4 can be composed of a semi-cylindrical bottom plate, two rectangular side plates, a rectangular top plate, and two end plates with rectangular upper parts and semi-circular lower parts. The mixing chamber 41 is a strip-shaped cavity with a cross-sectional shape similar to that of the end plates. Optionally, a hole structure is provided at each of the four corners of the upper rectangular cover plate of the water-sand mixer 4, and four protruding piles are provided on the upper shell of the water-sand mixer 4. The holes and protruding piles match each other in pairs to ensure that the upper rectangular cover plate can be stably placed on the water-sand mixer 4 without slipping.

[0065] The double-helix agitator includes a central shaft and two helical blades mounted on the central shaft. During operation, the two helical blades rotate with the central shaft, generating a stronger forced pushing, mixing, kneading, or cutting effect than a single helix, significantly improving mixing efficiency. The drive assembly is used to rotate the central shaft of the double-helix agitator. Bearings can be installed on opposite sidewalls of the water-sand mixer 4, with both ends of the double-helix agitator's central shaft passing through these bearings, and at least one end of the central shaft connected to the drive assembly.

[0066] In some embodiments, combined with Figure 4 The mixing chamber 41 is provided with at least two flow stabilizing structures 44, which divide the mixing chamber 41 into a front chamber 411, a middle chamber 412 and a rear chamber 413 arranged longitudinally. At least a portion of the mixing element 42 is located in the middle chamber 412. The front chamber 411 is provided with a water inlet 45, the middle chamber 412 is provided with a sand inlet 46, and the outlet 43 is located in the rear chamber 413.

[0067] The mixing chamber 41 is divided into a front chamber 411, a middle chamber 412, and a rear chamber 413 by at least two flow-stabilizing structures 44. The middle chamber 412 is used for mixing. A sand inlet 46 can be opened on the top plate of the middle chamber 412, allowing operators to add sand to the middle chamber 412 through the sand inlet 46. An inverted conical funnel can be installed at the sand inlet 46 to facilitate the addition of sand. The front chamber 411 is equipped with a water inlet 45, through which water can be added to the water-sand mixture. The advantage of adding water from the front chamber 411 is that the flow-stabilizing structure 44 between the front chamber 411 and the middle chamber 412 can mitigate the impact of the water flow, reduce the influence of the added water flow on the internal flow field of the middle chamber 412, and improve mixing uniformity and efficiency. Of course, water can also be added from other places, such as through the sand inlet 46. The rear cavity 413 is provided with an outlet 43. The water-sand mixture formed in the middle cavity 412 enters the rear cavity 413 through the flow stabilizing structure 44. Due to the presence of the flow stabilizing structure 44, the water-sand mixture in the rear cavity 413 is relatively smooth, and the water-sand mixture can be discharged evenly from the outlet 43.

[0068] In the above structure, the mixing chamber 41 is divided into three chambers that perform the functions of adding water, adding sand, and conveying flow by at least two flow stabilizing structures 44. This can significantly improve the mixing uniformity and efficiency, and produce a water-sand mixture with more uniform sand particle distribution.

[0069] Optionally, combined Figure 7 The flow stabilizing structure 44 includes a plate with multiple through holes. The through holes allow water and sand particles to pass through. The multiple through holes can transform large-scale, high-intensity disordered turbulence into small-scale, uniform, smooth laminar flow or low-turbulence fluid, thereby improving the stability of the flow field inside the mixing chamber 41 and improving the uniformity and smoothness of the water-sand mixture flowing out of the mixing chamber 41.

[0070] Combination Figure 6 The output port 43 is located at the lower part of the mixing chamber 41, for example, at the lower part of the end plate of the water-sand mixer 4. The output port 43 can be connected to the delivery pipe 1 by a pipe, such as a steel wire hose, thereby improving the flexibility of the delivery pipe 1 and improving the convenience of construction. A switch valve can be installed on the pipe to control the opening and closing state of the pipe, thereby controlling the frequency of discharge of the water-sand mixture according to the needs of use.

[0071] In some embodiments, the drive assembly includes a water turbine 5, the rotor of which is connected to the agitator 42 for driving the agitator 42 to rotate; the water turbine 5 is provided with a tailwater pipe 51, which is connected to the agitator chamber 41.

[0072] The water turbine 5 is a hydraulic machine that converts the energy of water flow into rotational mechanical energy. The water turbine 5 is equipped with a water inlet channel and a rotor assembly. The rotor assembly may include several rotors. Water flow is guided to the rotor assembly through the water inlet channel to drive the rotor assembly to rotate. The rotating rotor assembly can drive external components connected to it to rotate, thereby converting the water flow energy into rotational mechanical energy. "Driven connection" refers to a connection method that can transmit power and motion. Through drive connection, the rotor of the water turbine 5 can drive the agitator 42 to rotate, achieving the agitation function. Physically, the rotor of the water turbine 5 can be directly connected to the agitator 42, or indirectly connected through transmission structures such as gears or belts.

[0073] The tailwater pipe 51 is used to collect the finished water flow that passes through the rotor assembly. By connecting the tailwater pipe 51 to the mixing chamber 41, the finished water flow can be introduced into the mixing chamber 41 as a water body for water-sand mixture.

[0074] In the above structure, the water turbine 5 realizes the dual functions of driving and water injection, which can greatly simplify the drive system of the sand loading device and has the advantages of energy saving and consumption reduction. Moreover, the entire device can operate normally with only a small number of staff to complete the sand loading work, which greatly reduces labor costs. No motor equipment needs to be installed near the water-sand mixer 4, which helps to reduce the risk of leakage and improve construction safety.

[0075] Specifically, in combination Figure 4 , Figure 5 and Figure 7 The tailwater pipe 51 is connected to the front cavity 411. A water inlet 45 can be opened at the lower part of the end plate of the water sand mixer 4 so that one end of the tailwater pipe 51 is connected to the water inlet 45 on the end plate.

[0076] Optionally, the turbine 5 may be a mixed-flow turbine; the turbine 5 may include components such as a casing, rotor, and guide vanes, the guide vanes being composed of a ring of rotatable guide vanes distributed around the rotor, used to regulate flow and change output.

[0077] In some embodiments, the sand loading device further includes a water tank 6 and an inlet pipe 7, wherein the water tank 6 is connected to the water inlet of the turbine 5 through the inlet pipe 7; the height of the inlet of the inlet pipe 7 connected to the water tank 6 is higher than the height of the inlet of the inlet pipe 7 connected to the water inlet of the turbine 5.

[0078] Water tank 6 is used to store water. An outlet 621 can be installed inside water tank 6. Inlet pipe 7 connects the outlet 621 of water tank 6 and the inlet of water turbine 5, allowing water in water tank 6 to flow into water turbine 5 along inlet pipe 7, thereby driving the rotor assembly in water turbine 5 to rotate. The finished water flows into stirring chamber 41 along tailrace pipe 51. During use, sufficient water can be stored in water tank 6 in advance, or water can be continuously or intermittently added to water tank 6 during operation.

[0079] Let H1 be the height of the pipe opening connecting the inlet pipe 7 to the water tank 6, and H2 be the height of the pipe opening connecting the inlet pipe 7 to the water inlet of the turbine 5. Then, H1 > H2, ensuring that the water flowing out of the water tank 6 can drive the turbine 5. Furthermore, H1 - H2 ≥ 2 meters to ensure that the water head can drive the turbine 5.

[0080] Optionally, combined Figure 5 The water inlet pipe 7 includes a main pipe 71, a first branch pipe 72, and a second branch pipe 73 that are connected to each other. The main pipe 71 is connected to the water tank 6, the first branch pipe 72 is connected to the water inlet of the water turbine 5, and the second branch pipe 73 is connected to the stirring chamber 41. A first water valve 711 is provided on the main pipe 71, and a second water valve 731 is provided on the second branch pipe 73.

[0081] In the above embodiments, the flow direction of the water can be changed by switching the opening and closing states of the first water valve 711 and the second water valve 731, and the water flow rate can also be changed by changing the opening size of the first water valve 711 and the second water valve 731. The first water valve 711 on the main pipe 71 can control the opening and closing state of the sand loading device, that is, when the first water valve 711 on the main pipe 71 is closed, the sand loading device is closed. The second water valve 731 on the second branch pipe 73 can control the rotational speed of the turbine 5 rotor, that is, by changing the opening size of the second water valve 731, the water flow rate of the second branch pipe 73 can be adjusted, and the water flow rate of the first branch pipe 72 can be changed accordingly, thereby changing the rotational speed of the turbine 5 rotor.

[0082] Specifically, in combination Figure 4 , Figure 5 and Figure 7 The second branch pipe 73 is connected to the front cavity 411. A water inlet 45 can be opened on the top plate of the water sand mixer 4 so that one end of the second branch pipe 73 is connected to the water inlet 45 on the top plate.

[0083] Optionally, combined Figure 8 The water tank 6 is equipped with a partition 61, which divides the water storage chamber of the water tank 6 into a first chamber 62 and a second chamber 63. The water outlet 621 of the water tank 6 is located in the first chamber 62. The top of the partition 61 is lower than the top of the water storage chamber, and the water outlet 621 is lower than the top of the partition 61. The water tank 6 also includes a water injection assembly, which is used to inject water into the second chamber 63. The water inlet pipe 7 is connected to the water outlet 621 in the first chamber 62.

[0084] In use, the water injection component injects water into the second chamber 63. After the second chamber 63 is full, since the top of the baffle 61 is lower than the top of the water storage chamber, the excess water can overflow from the top of the baffle 61 into the first chamber 62, and then flow into the water inlet pipe 7 that connects to the first chamber 62. In this structure, the water injection component does not directly inject water into the first chamber 62, which can effectively reduce or eliminate the impact force of the water flow injected by the water injection component, so as to maintain the water head of the water flow into the turbine 5 within a stable range, thereby maintaining the rotation speed of the agitator 42 within a stable range and improving the uniformity of mixing.

[0085] The head of the water flowing into the turbine 5 is approximately equal to the height difference between the top of the baffle 61 and the inlet of the turbine 5 minus the head loss. During operation, the height difference between the top of the baffle 61 and the inlet of the turbine 5 remains constant, and the water flows along similar paths, resulting in a relatively approximate head loss, which keeps the head of the water flowing into the turbine 5 within a stable range.

[0086] Optionally, combined Figure 8 The outlet 621 is located at the bottom of the first chamber 62, and the bottom of the first chamber 62 is configured as a funnel shape that slopes from all sides toward the outlet 621, so that the water overflowing from the second chamber 63 can flow smoothly to the outlet 621 and flow into the inlet pipe 7 from the outlet 621.

[0087] Specifically, in combination Figure 1 and Figure 6 The water injection assembly includes a water supply pipe 64 and a water pump 65. The water pump 65 is used to pump water. One end of the water supply pipe 64 is connected to the water pump 65, and the other end is connected to the second chamber 63. The water pump 65 is preferably a model with a head of 5 meters or more to ensure that the water pump 65 can deliver water to the water tank 6 at a higher position. The end of the water supply pipe 64 that connects to the second chamber 63 is preferably lower than the top of the partition 61. In this way, during use, the end of the water supply pipe 64 can be submerged below the water surface of the second chamber 63, which helps to reduce disturbance to the water surface.

[0088] Optionally, water tank 6 is made of transparent plexiglass to allow operators to easily observe the water level inside.

[0089] Optionally, the lower part of the second chamber 63 is provided with a drain outlet 631 and a sealing structure. The drain outlet 631 connects the second chamber 63 to the outside, and the sealing structure seals the drain outlet 631. The sealing structure is configured to switch between a sealing state and an open state, so that the drain outlet 631 can be sealed when in use and opened after use to drain the water in the second chamber 63.

[0090] Based on the above structure, the drain outlet 631 of the second chamber 63 is further connected to a drain pipe 632, and a third water valve 633 is provided on the drain pipe 632. The third water valve 633 can serve as a sealing structure as described above, and the opening and closing state of the drain outlet 631 can be adjusted by the third water valve 633. The drain pipe 632 can be connected to a water storage tank or water source through a pipeline to divert excess water into the water storage tank or water source. The pipeline is, for example, a steel wire hose, and the water source is, for example, a river. The water pump 65 can draw water from the water storage tank or water source and then send the water into the water tank 6 through the water delivery pipe 64.

[0091] In some embodiments, the water tank 6 is supported by a water tank frame, and the four legs under the water tank frame are equipped with height adjustment devices to adjust the height to ensure that the water tank frame can adapt to various terrains and ensure that the water tank 6 above is stable; the height adjustment device is, for example, a telescopic sleeve.

[0092] A third aspect of the present invention provides a sand loading system, including a membrane bag and a sand loading device as described above.

[0093] Optionally, when the infusion tube 1 extends into the membrane bag, the inner wall of the membrane bag can abut against the outer wall of the support 2.

[0094] The sand loading system described in this embodiment can significantly reduce or even eliminate the staged waiting period during the sand loading process, thereby improving sand loading efficiency.

[0095] A fourth aspect of the present invention provides a sand filling method, which uses the sand filling device described above to fill a membrane bag with sand particles.

[0096] Specifically, the sand loading method includes the following steps: Insert the inlet tube 1 into the membrane bag from the bag opening, and make the support 2 open the membrane bag; Water is added to the water tank 6, and the water flow drives the rotor of the water turbine 5 to rotate, thereby driving the agitator 42 to rotate.

[0097] The order of the above steps is not strictly limited. In one optional embodiment, water is continuously injected into the water tank 6, causing the conveying pipe 1 to continuously output a water-sand mixture. Simultaneously, an operator places a membrane bag over the outside of the conveying pipe 1 and the support 2. As the water-sand mixture is injected, the membrane bag gradually fills with sand particles. Once full, another membrane bag can be replaced. Of course, when replacing the membrane bag, the switch valve installed on the conveying pipe 1 or the pipeline can be closed to stop the output of the water-sand mixture. The switch valve can be reopened after the replacement is completed.

[0098] Optionally, a support device can also be provided. During use, the conveying pipe 1 can be installed on the support device so that the conveying pipe 1 is tilted downward and the pipe opening is a certain height above the ground. The height of the pipe opening above the ground is preferably slightly lower than the vertical height when the membrane bag is full of sand. This makes it convenient for operators to remove the membrane bag full of sand from the conveying pipe 1, and also allows the membrane bag containing some sand but not yet full to fall to the ground, with the ground supporting the membrane bag and sand. This eliminates the need for operators to continuously lift the membrane bag, reducing manpower consumption.

[0099] In summary, the present invention has at least the following beneficial effects: ① During the construction of sand filling in membrane bags, there is no need for manual repetitive and inefficient sand filling operations. After the water pump 65 is turned on, the operator only needs to pour the sand into the inverted cone-shaped funnel on the upper side of the water-sand mixer 4 at regular intervals.

[0100] ② The partition 61 installed inside the water tank 6 can clearly fix the head elevation of the effective water body in the water tank 6, ensuring the normal operation of the water turbine 5.

[0101] ③ The water turbine 5 can directly provide power to the mixing component 42 inside the water-sand mixer 4, without the need for an additional power source.

[0102] ④ The sand conveying assembly's water-filtering and sand-locking design ensures that after the water-sand mixture is conveyed into the membrane bag, the water is discharged from the membrane bag while the sand particles remain inside the membrane bag and are not discharged with the water, thus improving construction efficiency.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sand conveying assembly for filtering and locking sand, characterized in that, include: The conveying pipe (1) has a conveying channel inside; A support (2) is fitted on the outside of the conveying pipe (1). The support (2) is used to open the membrane bag to form a drainage channel between the outer wall of the conveying pipe (1) and the inner wall of the membrane bag. A filter structure (3) is provided in the drainage channel, and the filter structure (3) can block sand particles from passing through.

2. The sand conveying assembly for filtering and locking sand according to claim 1, characterized in that, The support (2) has a hollow structure, and the filter structure (3) is located in the hollow structure.

3. The sand conveying assembly for filtering and locking sand according to claim 1, characterized in that, The drainage channel extends along the length of the conveying pipe (1); And / or, the support (2) includes a support ring, which is connected to the inlet pipe (1) via a connecting assembly (21); And / or, the filter structure (3) is a permeable geotextile.

4. A sand loading device, characterized in that, The device includes a water-sand mixer (4), a drive assembly, and a sand conveying assembly for filtering and locking sand as described in any one of claims 1-3. The water-sand mixer (4) includes a mixing chamber (41) and a mixing element (42). The mixing chamber (41) is provided with an output port (43). One end of the conveying pipe (1) is connected to the output port (43). The drive assembly is used to drive the mixing element (42) to rotate within the mixing chamber (41).

5. The sand loading device according to claim 4, characterized in that, The water-sand mixer (4) is a horizontal mixer, and the mixing component (42) is a double spiral cutter. The stirring chamber (41) is provided with at least two flow stabilizing structures (44), which divide the stirring chamber (41) into a front chamber (411), a middle chamber (412) and a rear chamber (413) arranged longitudinally. At least a portion of the stirring component (42) is located in the middle chamber (412). The front chamber (411) is provided with a water inlet (45), the middle chamber (412) is provided with a sand inlet (46), and the outlet (43) is located in the rear chamber (413). The current stabilizing structure (44) includes a plate body with multiple through holes.

6. The sand loading device according to claim 4 or 5, characterized in that, The drive assembly includes a water turbine (5), the rotor of which is connected to the agitator (42) for driving the agitator (42) to rotate; the water turbine (5) is provided with a tailwater pipe (51), which is connected to the agitator (41).

7. The sand loading device according to claim 6, characterized in that, It also includes a water tank (6) and an inlet pipe (7), wherein the water tank (6) is connected to the water inlet of the water turbine (5) through the inlet pipe (7); The height of the inlet of the water inlet pipe (7) connected to the water tank (6) is higher than the height of the inlet of the water inlet pipe (7) connected to the water inlet of the water turbine (5).

8. The sand loading device according to claim 7, characterized in that, The water inlet pipe (7) includes a main pipe (71), a first branch pipe (72), and a second branch pipe (73) connected together. The main pipe (71) is connected to the water tank (6), the first branch pipe (72) is connected to the water inlet of the water turbine (5), and the second branch pipe (73) is connected to the stirring chamber (41). A first water valve (711) is provided on the main pipe (71), and a second water valve (731) is provided on the second branch pipe (73).

9. The sand loading device according to claim 7, characterized in that, The water tank (6) is provided with a partition (61) that divides the water storage chamber of the water tank (6) into a first chamber (62) and a second chamber (63). The top of the partition (61) is lower than the top of the water storage chamber. The water tank (6) also includes a water injection assembly for injecting water into the second chamber (63). The water inlet pipe (7) is connected to the first chamber (62). The height of the inlet of the water inlet pipe (7) connected to the water tank (6) is H1, and the height of the inlet of the water inlet pipe (7) connected to the water inlet of the water turbine (5) is H2, wherein H1-H2≥2 meters.

10. A method for loading sand, characterized in that, Using the sand loading device as described in any one of claims 7-9 includes the following steps: The infusion tube (1) is inserted into the membrane bag from the bag opening, and the support (2) is used to open the membrane bag; Water is injected into the water tank (6), and the water flow drives the rotor of the water turbine (5) to rotate, thereby driving the agitator (42) to rotate.

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