Pressure adjustable sand extractor

Abstract

This utility model discloses a pressure-adjustable sand dredging pipe, including a pipeline structure, a sand suction head connected to one end of the pipeline structure, and a pressure pump connected to the other end of the pipeline structure. The pipeline structure includes two rigid fixed pipe sections, a wear-resistant extraction pipe section, and a three-way ball valve connecting the rigid fixed pipe section and the extraction pipe section. The two outlets of the three-way ball valve are respectively connected to the two rigid fixed pipe sections, and the inlet of the three-way ball valve is connected to the extraction pipe section. Both the extraction pipe section and the rigid fixed pipe section are equipped with connecting flanges. This utility model achieves good pressure control by installing a three-way ball valve on the sand dredging pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of construction equipment technology, specifically relating to a pressure-adjustable sand extraction pipe. Background Technology

[0002] Widely used in river dredging and sand pumping, this type of pipeline equipment is used to transport mixtures of solid particles such as sand, mud, and gravel with liquids. It is applied in fields such as mining, submarine engineering, and building foundation construction. Its core function is to use a pumping system to generate negative or positive pressure to extract the mixture from the working face to a designated location.

[0003] In summary, depending on the specific work scenario, it can be applied to various purposes, such as river and port dredging to remove sediment and restore channel depth; sand and gravel mining to extract sand and mineral particles from riverbeds and mines; construction engineering to extract underground mud during pile foundation construction or to treat foundation pit drainage; and environmental engineering for the cleaning and transport of contaminated sediment. Its methods of application differ slightly, but can be broadly categorized as follows:

[0004] Negative pressure suction uses a centrifugal pump or vacuum pump to generate negative pressure within the pipeline, drawing the sand and gravel mixture into the pipeline. This method is suitable for shallow, low-concentration sand and gravel extraction. Positive pressure conveying uses a high-pressure pump to force the mixture through the pipeline to its destination. This method is suitable for long-distance, high-concentration, or deep-sea operations.

[0005] In summary, the pressure inside the sand-pumping pipe is controlled by a pump to transport materials. However, in existing technology, the sand-pumping pipe has a single design and fixed pressure. When pumping sand and gravel of different particle sizes, excessive pressure may cause equipment wear, while insufficient pressure will result in inefficiency. In addition, different depths of operation may require different pumping pressures to ensure effective extraction without damaging the surrounding structure. Utility Model Content

[0006] The purpose of this utility model is to provide a pressure-adjustable sand extraction pipe, which achieves good pressure control by installing a three-way ball valve on the sand extraction pipe.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An adjustable pressure sand dredging pipe includes a pipeline structure, a sand suction head connected to one end of the pipeline structure, and a pressure pump connected to the other end of the pipeline structure. The pipeline structure includes two rigid fixed pipe sections, a wear-resistant extraction pipe section, and a three-way ball valve connected between the rigid fixed pipe section and the extraction pipe section. The two outlets of the three-way ball valve are respectively connected to the two rigid fixed pipe sections, and the inlet of the three-way ball valve is connected to the extraction pipe section. Both the extraction pipe section and the rigid fixed pipe section are provided with connecting flanges.

[0009] Furthermore, a wear-resistant elbow is provided at the connection between the extraction pipe section and the three-way ball valve, and the other end of the extraction pipe section is connected to the sand suction head.

[0010] Furthermore, the extraction pipe section includes a pipe body, which is provided with an inner lining layer, a reinforcing layer and an outer protective layer from the inside to the outside.

[0011] Furthermore, the wear-resistant elbow is lined with ceramic on the inner side and reinforced with ribs on the outer side.

[0012] Furthermore, each of the rigid fixed pipe segments comprises multiple steel pipes spliced ​​together in sequence, with the last steel pipe connected to a different pressure pump port.

[0013] Furthermore, the suction head has a funnel-shaped inlet.

[0014] Compared with the prior art, the advantages of this utility model are as follows: This utility model has a simple structure and is easy to implement. On the one hand, by dividing the sand extraction pipe into an extraction pipe section and a rigid fixed pipe section, when extracting sand for different scenarios and depths, only the extraction pipe section needs to be replaced, resulting in lower costs. On the other hand, a three-way ball valve connection method is adopted, with two outlets set in the ball valve, which are respectively connected to different rigid pipelines and different pressure pumps. The sand extraction pressure and sand extraction rate are controlled by adjusting the connection opening through the three-way ball valve. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the pressure-adjustable sand extraction pipe provided by this utility model.

[0017] Figure label:

[0018] 1. Pressure pump; 2. Rigid fixed pipe section; 3. Three-way ball valve; 4. Connecting flange; 5. Wear-resistant elbow; 6. Extraction pipe section; 7. Sand suction head. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0023] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] like Figure 1As shown, a pressure-adjustable sand dredging pipe includes a pipeline structure, a sand suction head 7 connected to one end of the pipeline structure, and a pressure pump 1 connected to the other end of the pipeline structure. The pipeline structure includes two rigid fixed pipe sections 2, a wear-resistant extraction pipe section 6, and a three-way ball valve 3 connecting the rigid fixed pipe section 2 and the extraction pipe section 6. The two outlets of the three-way ball valve 3 are respectively connected to the two rigid fixed pipe sections 2, and the inlet of the three-way ball valve 3 is connected to the extraction pipe section 6. Both the extraction pipe section 6 and the rigid fixed pipe section 2 are provided with connecting flanges 4.

[0027] Compared to existing technologies, sand suction operations primarily rely on creating a pressure difference within a pipe to extract silted sand deposited at the bottom of a pool or elsewhere. During this process, the required pressure differs between surface sand and deeper layers of sediment. To address the extraction of deep sand, some methods involve modifying flexible pipes by adding multiple, thinner flushing pipes to spray high-pressure water to disperse the silted sand layer before absorption. However, these methods are costly and prone to clogging the flushing pipes during absorption. Alternatively, the suction head 7 could be modified by incorporating a rotating agitator to disperse and extract the deep-seated sand.

[0028] In this invention, the sand extraction pipe is divided into an extraction section 6 and a rigid fixed section 2. The rigid fixed section 2 can be installed in a relatively fixed manner. For different sand extraction scenarios, only the flexible pipe needs to be replaced. For example, in the extraction of large-particle sedimentary sand, blockages can easily occur inside the pipe, requiring a backflushing function to clear the blockage. In such special operational needs, only the extraction section 6 needs to be replaced, resulting in lower overall replacement costs and faster speed. Furthermore, this invention uses a three-way ball valve 3 as a pressure regulating valve. The opening position of the ball core determines whether only one sand outlet or both sand outlets are opened. Each of the two sand outlets is connected to a pressure pump 1, thereby increasing the pressure in the flexible pipe and effectively extracting the sand deposited in the sedimentary layer.

[0029] A wear-resistant elbow 5 is provided at the connection between the extraction pipe section 6 and the three-way ball valve 3, and the other end of the extraction pipe section 6 is connected to the sand suction head 7. The extraction pipe section 6 includes a pipe body, which is provided with an inner lining layer, a reinforcing layer, and an outer protective layer from the inside out. The inner side of the wear-resistant elbow 5 is lined with ceramic, and the outer side is provided with reinforcing ribs. The extraction pipe section 6 is selected according to the flow rate requirement (commonly 50-300mm), and the larger the pipe diameter, the higher the conveying efficiency. The lining material is selected according to the hardness and concentration of sand and gravel (e.g., ceramic wear resistance > polyurethane > rubber). In this utility model, since the lining is in direct contact with the sand and gravel mixture and resists wear and corrosion, ceramic material is selected for the lining. The reinforcing layer provides mechanical strength, withstands the suction or pumping pressure, and prevents pipe deformation or bursting. It is selected from steel wire braided layer (high pressure resistance), fiber winding layer (tensile strength), or metal skeleton. The outer protective layer protects the pipeline from external environmental corrosion (ultraviolet rays, seawater, oil) and extends its service life. It is made of wear-resistant rubber, polyurethane, or PVC.

[0030] Each rigid fixed pipe section 2 comprises multiple steel pipes spliced ​​together in sequence, with the last steel pipe connected to the connection port of the pressure pump 1. The sand suction head 7 has a funnel-shaped inlet.

[0031] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A pressure-adjustable sand extraction pipe, characterized in that: The system includes a piping structure, a sand suction head connected to one end of the piping structure, and a pressure pump connected to the other end of the piping structure. The piping structure includes two rigid fixed pipe sections, a wear-resistant extraction pipe section, and a three-way ball valve connecting the rigid fixed pipe section and the extraction pipe section. The two outlets of the three-way ball valve are respectively connected to the two rigid fixed pipe sections, and the inlet of the three-way ball valve is connected to the extraction pipe section. Both the extraction pipe section and the rigid fixed pipe section are equipped with connecting flanges.

2. The pressure-adjustable sand extraction pipe according to claim 1, characterized in that: The connection between the extraction pipe section and the three-way ball valve is equipped with a wear-resistant elbow, and the other end of the extraction pipe section is connected to the sand suction head.

3. The pressure-adjustable sand extraction pipe according to claim 2, characterized in that: The extraction pipe section includes a pipe body, which is provided with an inner lining layer, a reinforcing layer and an outer protective layer from the inside to the outside.

4. The pressure-adjustable sand extraction pipe according to claim 2, characterized in that: The wear-resistant elbow is lined with ceramic on the inside and reinforced with ribs on the outside.

5. The pressure-adjustable sand extraction pipe according to claim 1, characterized in that: Each of the rigid fixed pipe sections comprises multiple steel pipes spliced ​​together in sequence, with the last steel pipe connected to a different pressure pump connection port.

6. The pressure-adjustable sand extraction pipe according to claim 1, characterized in that: The suction head has a funnel-shaped inlet.

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