A high-speed railway station construction wastewater multi-stage precipitation and recycling equipment

Abstract

This utility model relates to the field of high-speed railway station construction technology; and discloses a multi-stage sedimentation and recycling device for wastewater from high-speed railway station construction, including an inlet pipe, a filter structure at one end of the inlet pipe, a first sedimentation tank on the outer surface of one side of the filter structure, a second sedimentation tank inserted inside the outer surface of one side of the first sedimentation tank, a third sedimentation tank inserted inside the outer surface of one side of the second sedimentation tank, connecting structures at the connection points of the first and second sedimentation tanks and the second and third sedimentation tanks, and a drain pipe connected to the outer surface of one side of the third sedimentation tank. By pulling the insertion rod outward, one end of the insertion rod disengages from the locking groove. At this time, the sealing plate can be moved upward, disengaging from the outer surface of the upper end of the filter frame. Then, the first, second, and third filter plates can be sequentially removed from inside the filter frame.

Description

Technical Field

[0001] This utility model relates to the field of high-speed railway station construction technology; more specifically, it relates to a multi-stage sedimentation and recycling device for wastewater from high-speed railway station construction. Background Technology

[0002] The construction of high-speed railway station buildings is a complex system engineering project integrating high precision and large scale. Construction requires initial geological surveys and foundation treatment, followed by the construction of the main structure using large-span steel structures or concrete frames, and simultaneous installation of the curtain wall, roof, and other enclosure systems. Internally, the focus is on completing the decoration of functional areas such as the waiting hall and platform levels, integrating ventilation, fire protection, and intelligent systems. Throughout the construction process, strict control of precision and safety is essential, requiring coordination of multiple professional operations to ensure the timely delivery of a modern and user-friendly high-speed railway hub space.

[0003] The multi-stage sedimentation and recycling equipment for construction wastewater from high-speed railway stations efficiently removes silt, suspended solids, and some oil. The treated water is reused for concrete curing, dust suppression spraying, and vehicle washing, achieving a water resource recycling rate of over 80%. The equipment integrates automatic sludge discharge, liquid level control, and water quality monitoring functions. It features a small footprint, high treatment efficiency, and low operating costs, effectively solving the problem of construction wastewater pollution.

[0004] Currently, existing recycling equipment typically requires preliminary filtration of wastewater entering the sedimentation tank. After prolonged use, the internal filter structure needs cleaning or replacement. However, most existing equipment uses bolted connections for disassembly, requiring tools and is time-consuming and labor-intensive, thus reducing the equipment's practicality. Furthermore, existing equipment is often built directly on-site for wastewater filtration, and can be dismantled after use. This construction and dismantling process is also time-consuming and labor-intensive, hindering repeated use and further reducing practicality. Therefore, there is an urgent need for a multi-stage sedimentation and recycling system for wastewater from high-speed railway station construction to solve these problems. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a multi-stage sedimentation and recycling device for construction wastewater of high-speed railway stations, so as to solve the problems existing in the background art.

[0006] This utility model provides the following technical solution: a multi-stage sedimentation and recycling device for construction wastewater from high-speed railway stations, comprising: an inlet pipe, one end of which is provided with a filter structure, and a first sedimentation tank is provided on the outer surface of one side of the filter structure; a second sedimentation tank is inserted inside the outer surface of one side of the first sedimentation tank; a third sedimentation tank is inserted inside the outer surface of one side of the second sedimentation tank; connecting structures are provided inside the connection points of the first and second sedimentation tanks, and the second and third sedimentation tanks; a drain pipe is connected to the outer surface of one side of the third sedimentation tank; the filter structure includes a filter frame, a first filter plate, a second filter plate, a third filter plate, a sealed plate, a connecting plate, a movable groove, an insertion rod, and a first spring; the connecting structure includes a first connecting groove, a second connecting groove, a positioning hole, a first connecting pipe, a docking groove, a sliding groove, a second connecting pipe, a locking block, a receiving groove, a positioning bead, and a second spring.

[0007] Preferably, the outer surface of one side of the filter frame is fixedly connected to the outer surface of one end of the water inlet pipe, and a first filter plate, a second filter plate, and a third filter plate are inserted inside the filter frame. A sealing plate is attached to the outer surface of the upper end of the filter frame, and connecting plates are fixedly connected to the outer surfaces of both ends of the sealing plate. Movable grooves are opened inside the outer surfaces of both ends of the filter frame, and insertion rods are slidably connected inside the movable grooves. A first spring is provided inside the movable grooves. The outer surface of the other side of the filter frame is fixedly connected to the outer surface of the other side of the first sedimentation tank. This design allows the insertion rods to move inside the movable grooves.

[0008] Preferably, the first filter plate is made of stainless steel, the second filter plate is made of polyester fiber, and the third filter plate is made of activated carbon. An annular groove is formed inside the upper outer surface of the filter frame. A rubber ring is fixedly connected to the bottom surface of the sealed plate, and the positions of the rubber ring and the annular groove correspond. The external dimensions of the rubber ring and the internal dimensions of the annular groove are matched. This design can improve the service life of the first filter plate by utilizing the good corrosion resistance and high strength of the material itself.

[0009] Preferably, the two ends of the first spring abut against the outer surface of one side of the insertion rod and the inner wall surface of the movable groove, respectively. The two sets of connecting plates have locking grooves on the inner side of their outer surfaces, and the inner dimensions of the locking grooves are adapted to the outer dimensions of one end of the insertion rod. This design allows the insertion rod to automatically reset after moving inside the movable groove.

[0010] Preferably, there are two sets of first connecting grooves, and the two sets of first connecting grooves are respectively opened on the inner wall surface of one side of the first sedimentation tank and the inner wall surface of one side of the second sedimentation tank. There are two sets of second connecting grooves, and the two sets of second connecting grooves are respectively opened on the inner wall surface of the other side of the second sedimentation tank and the inner wall surface of one side of the third sedimentation tank. The inner wall surfaces of the upper and lower ends of the two sets of second connecting grooves are provided with positioning holes. The inner wall surfaces of the upper and lower ends of the two sets of first connecting grooves are each provided with a first connecting tube. The inner wall surface of one end of the first connecting tube is provided with a docking groove. The inner wall surfaces of the upper and lower ends of the docking groove are provided with sliding grooves. The inner wall surfaces of the docking grooves are each provided with a second connecting tube. The inner wall surfaces of the upper and lower ends of the second connecting tube are fixedly connected with locking blocks. The inner wall surfaces of the upper and lower ends of the locking blocks are provided with storage grooves. The inner wall surfaces of the storage grooves are provided with positioning beads and second springs. This design allows the locking blocks to be simultaneously inserted into the sliding grooves when one end of the second connecting tube is inserted into the docking groove.

[0011] Preferably, rectangular grooves are formed inside the inner wall surfaces of the upper and lower ends of the first connecting groove, and rectangular blocks are fixedly connected to the outer surfaces of the upper and lower ends of the first connecting tube. The outer dimensions of the rectangular blocks are adapted to the inner dimensions of the rectangular grooves. The outer dimensions of the locking blocks are adapted to the inner dimensions of the sliding grooves. The two ends of the second spring abut against the inner wall surface of the receiving groove and the surface of one side of the positioning bead, respectively. The outer dimensions of the other side of the positioning bead are adapted to the inner dimensions of the positioning hole. This design prevents the first connecting tube from rotating inside the first connecting groove when it is inserted into the first connecting groove.

[0012] The technical effects and advantages of this utility model are as follows: By pulling the insertion rod outward, one end of the insertion rod disengages from the inside of the locking groove. At this time, the sealing plate can be moved upward to disengage from the outer surface of the upper end of the filter frame. Then, the first filter plate, the second filter plate, and the third filter plate can be removed from the inside of the filter frame in sequence. The first filter plate, the second filter plate, and the third filter plate can then be cleaned or replaced. Afterward, the cleaned or unused first filter plate, the second filter plate, and the third filter plate can be inserted into the inside of the filter frame in sequence. Then, the sealing plate is covered on the outer surface of the upper end of the filter frame, and the rubber ring is inserted into the inside of the annular groove. At this time, the insertion rod can be released, allowing the insertion rod to reset itself under the elasticity of the first spring, and then one end of the insertion rod is inserted into the inside of the locking groove. This allows for quick and easy disassembly of the first filter plate, the second filter plate, and the third filter plate without the need for tools, which improves the practicality of the equipment to a certain extent.

[0013] By rotating the second connecting tube, the locking block moves inside the sliding groove, and the outer surface of the other side of the positioning bead no longer abuts against the inside of the positioning hole. Then, the second connecting tube can be moved outward, so that the outer surface of one end of the second connecting tube disengages from the inside of the docking groove, and the second connecting tube is disengaged from the inside of the second connecting groove. Subsequently, the first connecting tube can be moved outward from the inside of the first connecting groove, thereby separating the first connecting tube and the second connecting tube. Then, the third sedimentation tank can be moved upward, so that the third sedimentation tank disengages from the outer surface of one side of the second sedimentation tank. Then, the second sedimentation tank is moved upward, so that the second sedimentation tank disengages from the outer surface of one side of the first sedimentation tank. At this point, the first sedimentation tank, the second sedimentation tank, the third sedimentation tank, and the connecting structure can be loaded onto a vehicle and transported to the next construction site for use. The equipment is easy to disassemble and can be reused, which improves its practicality to a certain extent. Moreover, its overall structure is simple and reasonable in design, highly practical, and easy to promote and apply. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is an exploded three-dimensional structural diagram of the filter structure of this utility model.

[0016] Figure 3 This utility model Figure 2 Enlarged diagram of point A in the middle.

[0017] Figure 4 This is an exploded three-dimensional structural diagram of the connection structure of this utility model.

[0018] Figure 5 This utility model Figure 4 Enlarged diagram of point B in the middle.

[0019] The attached diagram is labeled as follows: 1. Inlet pipe; 2. Filter structure; 21. Filter frame; 22. First filter plate; 23. Second filter plate; 24. Third filter plate; 25. Sealing plate; 26. Connecting plate; 27. Movable groove; 28. Insertion rod; 29. ​​First spring; 3. First sedimentation tank; 4. Second sedimentation tank; 5. Third sedimentation tank; 6. Connecting structure; 61. First connecting groove; 62. Second connecting groove; 63. Positioning hole; 64. First connecting pipe; 65. Docking groove; 66. Sliding groove; 67. Second connecting pipe; 68. Locking block; 69. Storage groove; 610. Positioning bead; 611. Second spring; 7. Drain pipe. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The construction of high-speed railway station buildings involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Example 1, as Figures 1-5As shown in the figure, this embodiment proposes a multi-stage sedimentation and recycling device for construction wastewater from high-speed railway stations, including: an inlet pipe 1, a filter structure 2 at one end of the inlet pipe 1, a first sedimentation tank 3 on the outer surface of one side of the filter structure 2, a second sedimentation tank 4 inserted inside the outer surface of one side of the first sedimentation tank 3, a third sedimentation tank 5 inserted inside the outer surface of one side of the second sedimentation tank 4, a connecting structure 6 at the connection points of the first sedimentation tank 3 and the second sedimentation tank 4, and the third sedimentation tank 5, and a drain pipe 7 connected to the outer surface of one side of the third sedimentation tank 5; the filter structure 2 includes a filter frame 21. The filter frame 21 comprises a first filter plate 22, a second filter plate 23, a third filter plate 24, a sealing plate 25, a connecting plate 26, a movable groove 27, an insertion rod 28, and a first spring 29. One side of the outer surface of the filter frame 21 is fixedly connected to the outer surface of one end of the water inlet pipe 1. The first filter plate 22, the second filter plate 23, and the third filter plate 24 are inserted inside the filter frame 21. A sealing plate 25 is attached to the upper outer surface of the filter frame 21. Connecting plates 26 are fixedly connected to the outer surfaces of both ends of the sealing plate 25. Movable grooves 27 are formed inside the outer surfaces of both ends of the filter frame 21, and insertion rods 28 are slidably connected inside the movable grooves 27. Furthermore, the movable groove 27 is equipped with a first spring 29 inside. The outer surface of the other side of the filter frame 21 is fixedly connected to the outer surface of the other side of the first sedimentation tank 3. The first filter plate 22 is made of stainless steel, the second filter plate 23 is made of polyester fiber, and the third filter plate 24 is made of activated carbon. An annular groove is opened inside the upper outer surface of the filter frame 21. A rubber ring is fixedly connected to the bottom surface of the sealed plate 25, and the positions of the rubber ring and the annular groove correspond. Moreover, the external dimensions of the rubber ring and the internal dimensions of the annular groove are adapted to each other. This design can improve the first filtration efficiency by utilizing the good corrosion resistance and high strength of the first filter plate 22 itself. The first filter plate 22 can block larger impurities in the wastewater, and the second filter plate 23 can improve its filtration efficiency through its good filtration properties and chemical stability. The second filter plate 23 can also filter smaller impurities in the wastewater. The third filter plate 24 can improve its adsorption of organic matter and heavy metals in the wastewater through its good adsorption and regenerability, and can also improve water quality. At the same time, the good elasticity and sealing properties of the rubber material can prevent the wastewater from leaking inside the filter frame 21.

[0022] The two ends of the first spring 29 abut against the outer surface of one side of the insertion rod 28 and the inner wall surface of the movable groove 27, respectively. The two sets of connecting plates 26 are provided with locking grooves on the outer surfaces of their respective sides. The internal dimensions of the locking grooves are adapted to the external dimensions of one end of the insertion rod 28. This design allows the insertion rod 28 to return to its original position under the elasticity of the first spring 29 after moving inside the movable groove 27. This allows one end of the insertion rod 28 to be inserted into the locking groove, positioning the sealing plate 25 on the upper outer surface of the filter frame 21. This design also makes the insertion rod 28 more stable when one end is inserted into the locking groove.

[0023] Example 2, as Figure 4 and Figure 5As shown, based on the same concept as the above embodiments, this embodiment also proposes: the connecting structure 6 includes a first connecting groove 61, a second connecting groove 62, a positioning hole 63, a first connecting pipe 64, a mating groove 65, a sliding groove 66, a second connecting pipe 67, a locking block 68, a storage groove 69, a positioning bead 610, and a second spring 611. Two sets of the first connecting groove 61 are provided, with the two sets of first connecting grooves 61 respectively opened on the inner wall surface of one side of the first sedimentation tank 3 and the inner wall surface of one side of the second sedimentation tank 4. Two sets of the second connecting groove 62 are provided, with the two sets of second connecting grooves 62 respectively opened on the inner wall surface of the other side of the second sedimentation tank 4 and the inner wall surface of one side of the third sedimentation tank 5. On the surface, positioning holes 63 are provided inside the inner walls of the upper and lower ends of the two sets of second connecting grooves 62. First connecting tubes 64 are inserted into the inner walls of the two sets of first connecting grooves 61. A mating groove 65 is provided inside the outer surface of one end of the first connecting tube 64. Sliding grooves 66 are provided inside the inner walls of the upper and lower ends of the mating groove 65. Second connecting tubes 67 are inserted into the mating grooves 65. Engaging blocks 68 are fixedly connected to the outer surfaces of both ends of the second connecting tube 67. Receiving grooves 69 are provided inside the outer surfaces of the upper and lower ends of the engaging blocks 68. Positioning beads 610 are engaged inside the receiving grooves 69. A second spring 611 is provided inside the receiving grooves 69. The first connecting... The inner surfaces of the upper and lower ends of the groove 61 are both provided with rectangular grooves. Rectangular blocks are fixedly connected to the outer surfaces of the upper and lower ends of the first connecting tube 64, and the external dimensions of the rectangular blocks match the internal dimensions of the rectangular grooves. The external dimensions of the locking block 68 match the internal dimensions of the sliding groove 66. The two ends of the second spring 611 abut against the inner wall surface of the receiving groove 69 and one side of the positioning bead 610, respectively. The external dimensions of the other side of the positioning bead 610 match the internal dimensions of the positioning hole 63. This design prevents the first connecting tube 64 from rotating inside the first connecting groove 61 when it is inserted into the groove. Furthermore, this design ensures proper locking... Block 68 can be inserted into the sliding groove 66, allowing the locking block 68 to move within the sliding groove 66 and engage with it to connect the first connecting pipe 64 and the second connecting pipe 67. This design also allows the positioning bead 610 to automatically reset itself after moving within the receiving groove 69 under the elasticity of the second spring 611. Furthermore, the outer surface of the other side of the positioning bead 610 is inserted into the positioning hole 63 to position the first connecting pipe 64 and the second connecting pipe 67. This design also makes the insertion of the other side of the positioning bead 610 into the positioning hole 63 more stable.

[0024] The positioning bead 610 and the second spring 611 in this application, as well as all movable parts, require regular cleaning and maintenance, including but not limited to dust removal and lubrication.

[0025] Working principle: When using the equipment, the second sedimentation tank 4 is inserted onto the outer surface of one side of the first sedimentation tank 3, followed by the insertion of the third sedimentation tank 5 onto the outer surface of one side of the second sedimentation tank 4. Then, the first connecting pipe 64 is inserted into the first connecting groove 61. At this time, the positions of the locking blocks 68 on both sides of one end of the second connecting pipe 67 correspond to the positions of the sliding groove 66. The second connecting pipe 67 is then inserted into the second connecting groove 62, so that one end of the second connecting pipe 67 is inserted into the mating groove 65, and the locking blocks 68 are inserted into the sliding groove 66. The second connecting pipe 67 can then be rotated to engage the locking blocks 68 in the sliding groove 66. The internal movement causes the outer surface of the positioning bead 610 to engage with the inside of the positioning hole 63, thus completing the connection and positioning between the first connecting pipe 64 and the second connecting pipe 67. At this time, the water pump can be started, allowing wastewater to enter the filter frame 21 through the inlet pipe 1 and pass through the three layers of filtration: the first filter plate 22, the second filter plate 23, and the third filter plate 24. The filtered water then sequentially enters the first sedimentation tank 3, the second sedimentation tank 4, and the third sedimentation tank 5, where flocculants are added. After sedimentation, the water is discharged through the drain pipe 7. After the equipment is used, the above process can be reversed to disassemble the first sedimentation tank 3, the second sedimentation tank 4, the third sedimentation tank 5, and the connecting structure 6, and transport them to the next construction site for use. When the first filter plate 22, the second filter plate 23, and the third filter plate 24 need to be replaced, the insertion rod 28 can be pulled outward so that one end of the insertion rod 28 is disengaged from the inside of the locking groove. At this time, the sealing plate 25 can be moved upward so that the sealing plate 25 is disengaged from the outer surface of the upper end of the filter frame 21. At this time, the first filter plate 22, the second filter plate 23, and the third filter plate 24 can be removed from the inside of the filter frame 21 in sequence. Then, the first filter plate 22, the second filter plate 23, and the third filter plate 24 can be removed from the inside of the filter frame 21. 3. The first filter plate 22, the second filter plate 23, and the third filter plate 24 are cleaned or replaced. Then, the cleaned or unused first filter plate 22, the second filter plate 23, and the third filter plate 24 are sequentially inserted into the inside of the filter frame 21. Then, the sealing plate 25 is covered on the outer surface of the upper end of the filter frame 21, and the rubber ring is inserted into the inside of the annular groove. At this time, the insertion rod 28 can be released, so that the insertion rod 28 resets itself under the elasticity of the first spring 29, and one end of the insertion rod 28 is inserted into the inside of the locking groove. This makes it easy to quickly disassemble and replace the first filter plate 22, the second filter plate 23, and the third filter plate 24. The above is the entire working principle of this utility model.

[0026] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0027] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0028] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage sedimentation and recycling device for construction wastewater from high-speed railway stations, characterized in that, include: Water inlet pipe (1), one end of which is provided with a filter structure (2), and a first sedimentation tank (3) is provided on the outer surface of one side of the filter structure (2), and a second sedimentation tank (4) is inserted inside the outer surface of one side of the first sedimentation tank (3), and a third sedimentation tank (5) is inserted inside the outer surface of one side of the second sedimentation tank (4). A connecting structure (6) is provided inside the connection between the first sedimentation tank (3) and the second sedimentation tank (4), the second sedimentation tank (4) and the third sedimentation tank (5), and a drain pipe (7) is connected inside the outer surface of one side of the third sedimentation tank (5). The filter structure (2) includes a filter frame (21), a first filter plate (22), a second filter plate (23), a third filter plate (24), a sealing plate (25), a connecting plate (26), a movable groove (27), an insertion rod (28), and a first spring (29). The connection structure (6) includes a first connection groove (61), a second connection groove (62), a positioning hole (63), a first connection tube (64), a docking groove (65), a sliding groove (66), a second connection tube (67), a locking block (68), a storage groove (69), a positioning bead (610), and a second spring (611).

2. The multi-stage sedimentation and recycling equipment for construction wastewater from high-speed railway stations according to claim 1, characterized in that: The outer surface of one side of the filter frame (21) is fixedly connected to the outer surface of one end of the water inlet pipe (1), and the filter frame (21) is equipped with a first filter plate (22), a second filter plate (23) and a third filter plate (24). The outer surface of the upper end of the filter frame (21) is attached to a sealing plate (25). The outer surfaces of both ends of the sealing plate (25) are fixedly connected to connecting plates (26). The inner surfaces of both ends of the filter frame (21) are provided with movable grooves (27), and the inner surfaces of the movable grooves (27) are fitted with insert rods (28). The inner surfaces of the movable grooves (27) are provided with a first spring (29). The outer surface of the other side of the filter frame (21) is fixedly connected to the outer surface of the other side of the first sedimentation tank (3).

3. The multi-stage sedimentation and recycling equipment for construction wastewater from high-speed railway stations according to claim 1, characterized in that: The first filter plate (22) is made of stainless steel, the second filter plate (23) is made of polyester fiber, the third filter plate (24) is made of activated carbon, the upper outer surface of the filter frame (21) is provided with an annular groove, the bottom surface of the sealed plate (25) is fixedly connected with a rubber ring, and the positions of the rubber ring and the annular groove are corresponding, and the external dimensions of the rubber ring and the internal dimensions of the annular groove are compatible.

4. The multi-stage sedimentation and recycling equipment for construction wastewater from high-speed railway stations according to claim 1, characterized in that: The two ends of the first spring (29) abut against the outer surface of one side of the insertion rod (28) and the inner wall surface of the movable groove (27), respectively. The two sets of connecting plates (26) are provided with locking grooves on the outer surface of one side of each other, and the internal dimensions of the locking grooves are adapted to the external dimensions of one end of the insertion rod (28).

5. The multi-stage sedimentation and recycling equipment for construction wastewater from high-speed railway stations according to claim 1, characterized in that: The first connecting groove (61) is provided in two sets, and the two sets of the first connecting groove (61) are respectively opened on the inner wall surface of one side of the first sedimentation tank (3) and the inner wall surface of one side of the second sedimentation tank (4). The second connecting groove (62) is provided in two sets, and the two sets of the second connecting groove (62) are respectively opened on the inner wall surface of the other side of the second sedimentation tank (4) and the inner wall surface of one side of the third sedimentation tank (5). The inner wall surfaces of the upper and lower ends of the two sets of the second connecting groove (62) are provided with positioning holes (63). The inner walls of the two sets of the first connecting groove (61) are each provided with a first connecting pipe. 64), and a docking groove (65) is provided inside the outer surface of one end of the first connecting pipe (64), and a sliding groove (66) is provided inside the inner wall surface of the upper and lower ends of the docking groove (65). A second connecting pipe (67) is inserted inside the docking groove (65), and a locking block (68) is fixedly connected to the outer surface of one end of the second connecting pipe (67). A storage groove (69) is provided inside the outer surface of the upper and lower ends of the locking block (68). A positioning bead (610) is locked inside the storage groove (69), and a second spring (611) is provided inside the storage groove (69).

6. The multi-stage sedimentation and recycling equipment for construction wastewater from high-speed railway stations according to claim 1, characterized in that: The inner walls of the upper and lower ends of the first connecting groove (61) are provided with rectangular grooves. The outer surfaces of the upper and lower ends of the first connecting tube (64) are fixedly connected with rectangular blocks, and the outer dimensions of the rectangular blocks are adapted to the inner dimensions of the rectangular grooves. The outer dimensions of the locking block (68) are adapted to the inner dimensions of the sliding groove (66). The two ends of the second spring (611) abut against the inner wall surface of the storage groove (69) and the surface of one side of the positioning bead (610), respectively. The outer dimensions of the other side of the positioning bead (610) are adapted to the inner dimensions of the positioning hole (63).

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