Filtering and draining device for screw conveyor

Abstract

The utility model relates to the technical field of shield tunneling, in particular to a filtering and draining device for a screw conveyor, which comprises a water passing cavity, a first one-way conducting assembly, a second one-way conducting assembly and a water pressing cavity, the water passing cavity is provided with a water passing inlet and a water passing outlet, and the water passing inlet is provided with a filtering assembly; the first one-way conducting assembly is arranged in the water passing cavity; the second one-way conduction assembly is arranged in the water passing cavity, and the first one-way conduction assembly and the second one-way conduction assembly are arranged at intervals so as to define a closed water passing water rotation cavity with the water passing cavity; the water pressing cavity is communicated with the water passing rotary cavity and is provided with a suction assembly; and the conducting directions of the first one-way conducting assembly and the second one-way conducting assembly are from the water passing inlet to the water passing outlet. According to the spiral conveyor, water in the spiral conveyor can be discharged, the moisture content of thin slag is reduced, and the thin slag is prevented from splashing on the inclined conveyor to enable excessive muck to be gathered in a tunnel.

Description

Technical Field

[0001] This application relates to the field of shield tunneling technology, specifically to a filtration and drainage device for a screw conveyor. Background Technology

[0002] Earth pressure balance tunnel boring machines (TBMs) use a screw conveyor and an inclined belt conveyor for muck removal. The inclined belt conveyor is located below the screw conveyor, carrying the muck out of the TBM. When the TBM resumes operation after a prolonged shutdown or when it reaches water-rich strata, a gushing problem can occur, producing a large amount of thin muck. This thin muck has a certain degree of fluidity, and when its moisture content is too high, it can cause strong splashing as it falls onto the inclined belt conveyor. Water can carry the muck directly into the tunnel, resulting in a significant accumulation of muck that cannot be transported out. Utility Model Content

[0003] This application provides a filtration and drainage device for a screw conveyor. By draining the water from the screw conveyor, the water content of the slag is reduced, and the splashing effect of the slag falling onto the inclined conveyor belt is weakened, thereby solving the problem in the prior art where a large amount of slag accumulates in the tunnel with the splashing water.

[0004] This application is achieved through the following technical solution:

[0005] A filtration and drainage device for a screw conveyor includes:

[0006] The water passage cavity has a water inlet and a water outlet at both ends along its length. The water inlet is equipped with a filter assembly to block the slag and soil in the screw conveyor.

[0007] A first unidirectional conduction component is disposed in the water passage cavity;

[0008] The second unidirectional conduction component is disposed in the water passage cavity. The first unidirectional conduction component and the second unidirectional conduction component are arranged at intervals along the length direction of the water passage cavity. The first unidirectional conduction component, the second unidirectional conduction component and the water passage cavity form a closed water transfer cavity.

[0009] The water pressure chamber is connected to the water transfer chamber. The water pressure chamber is equipped with a suction component, which can draw air from the water transfer chamber into the water pressure chamber or force air from the water pressure chamber into the water transfer chamber.

[0010] The conduction direction of both the first unidirectional conduction component and the second unidirectional conduction component is from the water inlet to the water outlet.

[0011] The filtration and drainage device for a screw conveyor provided in this application connects the water inlet to the inside of the screw conveyor. A suction assembly draws water from the water transfer chamber. Due to the unidirectional flow of the first and second unidirectional flow components, water in the screw conveyor is filtered by the filtration assembly and then rapidly enters the water transfer chamber and the pressure chamber. Media outside the water outlet does not enter the water transfer chamber. Then, the suction assembly forces water from the pressure chamber into the water transfer chamber. Due to the unidirectional flow of the first and second unidirectional flow components, water in the water transfer chamber does not flow back into the screw conveyor but instead reaches the water outlet through the second unidirectional flow component, thus achieving the discharge of water from the screw conveyor.

[0012] The filtration and drainage device for a screw conveyor provided in this application, compared with conventional filtration and drainage methods, utilizes the suction force provided by the suction component to extract water from the sludge in the screw conveyor, resulting in relatively high drainage efficiency. Furthermore, the water suction process and the drainage process are independent of each other through the first and second unidirectional guiding components, and do not interfere with each other. During the drainage process, the sludge at the water inlet will not be continuously adsorbed, which is beneficial for other sludge in the screw conveyor to carry away the sludge at the water inlet, thus preventing blockage of the water inlet and ensuring that the device has a continuously good drainage effect.

[0013] In some optional embodiments, the first unidirectional conduction component includes:

[0014] A first isolation plate is sealed to the inner wall of the water passage cavity, and a first water passage hole is provided on the first isolation plate;

[0015] A first isolation element is located in the water transfer cavity and can block the first water passage hole along the length of the water passage cavity.

[0016] A first elastic drive member is connected to the first isolation member and is fixed relative to the water passage cavity.

[0017] The first isolation member blocks the first water passage hole under the elastic force of the first elastic drive member.

[0018] In some alternative embodiments, the first elastic actuator is configured as a helical spring.

[0019] In some alternative embodiments, the first spacer is configured as a sphere;

[0020] The first isolation plate has a spherical protrusion adapted to the shape of the first isolation member, and the first water passage is located on the spherical protrusion.

[0021] In some optional embodiments, the second unidirectional conduction component includes:

[0022] The second isolation plate is sealed to the inner wall of the water passage cavity, and the second isolation plate is provided with a second water passage hole;

[0023] The second isolation element is located between the second isolation plate and the water outlet and can block the second water outlet along the length of the water passage cavity;

[0024] The second elastic drive member is connected to the second isolation member and is fixed relative to the water passage cavity;

[0025] The second isolation member blocks the second water passage hole under the elastic force of the second elastic drive member.

[0026] In some alternative embodiments, the second elastic drive element is configured as a helical spring.

[0027] In some alternative embodiments, the second spacer is configured as a sphere;

[0028] The second isolation plate is provided with a spherical protrusion adapted to the shape of the second isolation member, and the second water passage is located on the spherical protrusion.

[0029] In some alternative embodiments, the suction assembly includes:

[0030] A suction piston, which is located inside the water pressure chamber and is movably sealed to the inner wall of the water pressure chamber;

[0031] A reciprocating drive is provided, wherein the fixed end of the reciprocating drive is fixed relative to the water pressure chamber, and the moving end of the reciprocating drive is connected to the suction piston to drive the suction piston to move back and forth in the water pressure chamber.

[0032] In some alternative embodiments, the reciprocating drive is configured as a hydraulic cylinder.

[0033] In some alternative embodiments, the fixed end includes:

[0034] Fixed base;

[0035] Mounting base, the mounting base being used to connect the screw conveyor;

[0036] A pin is inserted into both the mounting base and the fixed base so that the fixed base can rotate about the pin axis on the mounting base.

[0037] Compared with the prior art, this application has the following advantages and beneficial effects:

[0038] 1. The filtration and drainage device for a screw conveyor provided in this application connects the water inlet to the inside of the screw conveyor. A suction assembly draws water from the water transfer chamber. Due to the unidirectional flow of the first and second unidirectional flow components, water in the screw conveyor is filtered by the filtration assembly and then rapidly enters the water transfer chamber and the pressure chamber. Media outside the water outlet does not enter the water transfer chamber. Then, the suction assembly presses water from the pressure chamber into the water transfer chamber. Due to the unidirectional flow of the first and second unidirectional flow components, water in the water transfer chamber does not flow back into the screw conveyor but instead reaches the water outlet through the second unidirectional flow component, thus achieving the discharge of water from the screw conveyor.

[0039] 2. The filtration and drainage device for the screw conveyor provided in this application, compared with conventional filtration and drainage methods, utilizes the suction force provided by the suction component to extract the water from the sludge in the screw conveyor, resulting in relatively high drainage efficiency. Furthermore, the water suction process and the drainage process are independent of each other through the first and second unidirectional guiding components, and do not interfere with each other. During the drainage process, the sludge at the water inlet will not be continuously adsorbed, which is beneficial for other sludge in the screw conveyor to carry away the sludge at the water inlet, thus preventing blockage of the water inlet and ensuring that the device has a continuously good drainage effect. Attached Figure Description

[0040] The accompanying drawings, which are included to provide a further understanding of the embodiments of this application and form part of this application, do not constitute a limitation on the embodiments of this application. In the drawings:

[0041] Figure 1 A schematic diagram of the filtration and drainage device for a screw conveyor provided in an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the cross-sectional structure of the water passage cavity provided in the embodiments of this application;

[0043] Figure 3 This is a schematic diagram of the cross-sectional structure of the pressurized water chamber provided in the embodiments of this application;

[0044] Figure 4 This is a schematic cross-sectional view of the first unidirectional conduction component provided in an embodiment of this application.

[0045] Figure 5 This is a schematic cross-sectional view of the second unidirectional conduction component provided in an embodiment of this application.

[0046] The attached diagram shows the markings and corresponding component names:

[0047] 1-Water passage chamber, 2-Filter assembly, 3-Pressing chamber, 4-Suction assembly, 5-First unidirectional flow assembly, 51-First isolation plate, 52-First isolation element, 53-First elastic drive element, 54-First water passage hole, 6-Second unidirectional flow assembly, 61-Second isolation plate, 62-Second isolation element, 63-Second elastic drive element, 64-Second water passage hole, 7-Suction piston, 8-Reciprocating drive element. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this application are only for explaining this application and are not intended to limit this application.

[0049] like Figures 1-3 As shown in the figure, this application provides a filtration and drainage device for a screw conveyor. The device includes a water passage chamber 1, a first unidirectional flow assembly 5, a second unidirectional flow assembly 6, and a pressure chamber 3. The water passage chamber 1 can be cylindrical in shape. One axial end of the water passage chamber 1 serves as a water inlet, and the other axial end serves as a water outlet. The water inlet is equipped with a filter assembly 2 to block slag in the screw conveyor. In practice, the filter assembly 2 can be a filter screen. The first unidirectional flow assembly 5 and the second unidirectional flow assembly 6 are disposed within the water passage chamber 1, and are spaced apart along the length of the water passage chamber 1. The first unidirectional flow assembly 5, the second unidirectional flow assembly 6, and the water passage cavity 1 form a closed water transfer cavity; the overall shape of the pressure chamber 3 can also be cylindrical, and the pressure chamber 3 is connected to the water transfer cavity. The pressure chamber 3 can be vertically connected to the outer wall of the water passage cavity 1. The pressure chamber 3 is equipped with a suction assembly 4, which can suck air from the water transfer cavity into the pressure chamber 3 or press air from the pressure chamber 3 into the water transfer cavity; wherein, the conduction direction of the first unidirectional flow assembly 5 and the second unidirectional flow assembly 6 is from the water inlet to the water outlet, that is, the fluid can only enter the water transfer cavity from the water inlet side and can only flow out of the water outlet side from the water transfer cavity.

[0050] The filtration and drainage device for a screw conveyor provided in this application embodiment connects the water inlet to the inside of the screw conveyor. The suction assembly 4 draws water from the water transfer chamber. Due to the unidirectional flow of the first unidirectional flow assembly 5 and the second unidirectional flow assembly 6, water in the screw conveyor is filtered by the filter assembly 2 and then rapidly enters the water transfer chamber and the pressure chamber 3. Medium outside the water outlet does not enter the water transfer chamber. Then, the suction assembly 4 pressurizes water from the pressure chamber 3 into the water transfer chamber. Due to the unidirectional flow of the first unidirectional flow assembly 5 and the second unidirectional flow assembly 6, water in the water transfer chamber does not flow back into the screw conveyor, but instead reaches the water outlet through the second unidirectional flow assembly 6, thus achieving the discharge of water from the screw conveyor.

[0051] The filtration and drainage device for a screw conveyor provided in this application embodiment, compared with conventional filtration and drainage methods, utilizes the suction force provided by the suction component 4 to extract water from the sludge in the screw conveyor, resulting in relatively high drainage efficiency. Furthermore, the water suction process and the drainage process are independent of each other through the first unidirectional flow component 5 and the second unidirectional flow component 6, and do not interfere with each other. During the drainage process, the sludge at the water inlet will not be continuously adsorbed, which is beneficial for other sludge in the screw conveyor to carry away the sludge at the water inlet, thus preventing blockage of the water inlet and ensuring that the device has a continuous and good drainage effect.

[0052] In some alternative embodiments, such as Figure 4 As shown, the first unidirectional conduction component 5 includes a first isolation plate 51, a first isolation member 52, and a first elastic drive member 53. The first isolation plate 51 is sealed to the inner wall of the water passage cavity 1. The overall shape of the first isolation plate 51 can be set to a circular plate shape adapted to the water passage cavity 1. A first water passage hole 54 is provided on the first isolation plate 51. The first water passage hole 54 can be set as a circular hole coaxial with the first isolation plate 51. In other embodiments, the shape of the first water passage hole 54 can also be set as a square hole, a triangular hole, a polygonal hole, etc., and the axis of the first water passage hole 54 can also be eccentrically arranged with the axis of the first isolation plate 51. The first isolation member 52 is located in the water transfer cavity and can block the first water passage hole 54 along the length direction of the water passage cavity 1. The first elastic drive member 53 is connected to the first isolation member 52 and is relatively fixed to the water passage cavity 1. The first isolation member 52 blocks the first water passage hole 54 under the elastic force of the first elastic drive member 53.

[0053] In some alternative embodiments, the first elastic drive member 53 is configured as a helical spring. This configuration ensures that the elastic force provided by the first elastic drive member 53 is relatively stable, guaranteeing that the first isolator 52 blocks the first water passage 54.

[0054] In some optional embodiments, the first isolation member 52 is constructed as a sphere; the first isolation plate 51 has a spherical protrusion adapted to the shape of the first isolation member 52, and the first water passage hole 54 is located on the spherical protrusion. This configuration allows the inner wall of the spherical protrusion to provide a certain guiding effect for the first isolation member 52, facilitating rapid sealing of the first water passage hole 54 by the first isolation member 52. Simultaneously, the spherical protrusion and the first isolation member 52 can have a large contact area, improving the sealing effect.

[0055] In some optional embodiments, the portion of the first isolation plate 51, excluding the spherical protrusion, is configured as a conical skirt structure. This configuration allows the wedge-shaped surface on the first isolation plate 51 to guide the first isolation member 52 into the spherical protrusion quickly when hydraulic disturbances cause it to deviate in the direction of movement during the water-passing transition cavity, thus achieving rapid sealing.

[0056] In some alternative embodiments, such as Figure 5 As shown, the second unidirectional conduction component 6 includes a second isolation plate 61, a second isolation member 62, and a second elastic drive member 63. The second isolation plate 61 is sealed to the inner wall of the water passage cavity 1. The overall shape of the second isolation plate 61 can be set to a circular plate shape adapted to the water passage cavity 1. A second water passage hole 64 is provided on the second isolation plate 61. The second water passage hole 64 can be set as a circular hole coaxial with the second isolation plate 61. In other embodiments, the shape of the second water passage hole 64 can also be set as a square hole, a triangular hole, a polygonal hole, etc., and the axis of the second water passage hole 64 can also be eccentrically arranged with the axis of the second isolation plate 61. The second isolation member 62 is located between the second isolation plate 61 and the water passage outlet and can block the second water passage hole 64 along the length direction of the water passage cavity 1. The second elastic drive member 63 is connected to the second isolation member 62 and is relatively fixed to the water passage cavity 1. The second isolation member 62 blocks the second water passage hole 64 under the elastic force of the second elastic drive member 63.

[0057] In some alternative embodiments, the second elastic drive member 63 is configured as a helical spring. This configuration ensures that the elastic force provided by the second elastic drive member 63 is relatively stable, thereby ensuring that the second isolator 62 blocks the second water passage 64.

[0058] In actual implementation, the first elastic drive member 53 and the second elastic drive member 63 can be an integral structure. That is, the middle part of the helical spring is fixedly connected to the water passage cavity 1, one end of the helical spring is connected to the first isolation member 52, and the other end is connected to the second isolation member 62. One end of the helical spring applies a pushing force to the first isolation member 52 to hold the first isolation member 52 against the first water passage hole 54 to achieve sealing, and the other end of the helical spring applies a pulling force to the second isolation member 62 to press the second isolation member 62 against the second water passage hole 64 to achieve sealing. This configuration can reduce assembly work.

[0059] In some optional embodiments, the second isolation member 62 is constructed as a sphere; the second isolation plate 61 has a spherical protrusion adapted to the shape of the second isolation member 62, and the second water passage 64 is located on the spherical protrusion. This configuration allows the inner wall of the spherical protrusion to provide a certain guiding effect for the second isolation member 62, facilitating rapid sealing of the second water passage 64 by the second isolation member 62. Simultaneously, the spherical protrusion and the second isolation member 62 can have a large contact area, improving the sealing effect.

[0060] In some optional embodiments, the portion of the second isolation plate 61, excluding the spherical protrusion, is configured as a conical skirt structure. This configuration allows the wedge-shaped surface on the second isolation plate 61 to guide the second isolation member 62 into the spherical protrusion quickly when hydraulic disturbances cause it to deviate in the direction of movement during the water-passing transition cavity, thus achieving rapid sealing.

[0061] In some optional embodiments, the suction assembly 4 includes a suction piston 7 and a reciprocating drive 8; the suction piston 7 is located inside the water pressure chamber 3 and is movably sealed to the inner wall of the water pressure chamber 3, and the overall shape of the suction piston 7 is cylindrical; the fixed end of the reciprocating drive 8 is fixed relative to the water pressure chamber 3, and the moving end of the reciprocating drive 8 is connected to the suction piston 7 to drive the suction piston 7 to move back and forth inside the water pressure chamber 3. The fixed end can be located inside or outside the water pressure chamber 3. When the fixed end is located outside the water pressure chamber 3, the piston rod of the fixed end moves through the water pressure chamber 3 and connects to the suction piston 7, and the piston rod and the water pressure chamber 3 are movably sealed together.

[0062] In some alternative embodiments, the reciprocating drive 8 is configured as a hydraulic cylinder. The hydraulic cylinder is capable of providing a large driving force, thereby enabling the water passage chamber 1 to be under a large negative pressure, which in turn causes the first isolation member 52 to disengage from the first water passage hole 54.

[0063] In some alternative embodiments, the fixed end includes a fixed seat, a mounting seat, and a pin; the mounting seat is used to connect the screw conveyor; the pin passes through both the mounting seat and the fixed seat so that the fixed seat can rotate about the pin axis on the mounting seat.

[0064] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details are included in the above description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0065] It should be noted that in this specification, similar reference numerals and letters in the above 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. In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, and are only for the convenience of describing this application 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 on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this application, it should be noted that unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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 communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0066] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A filtration and drainage device for a screw conveyor, characterized in that, include: The water passage cavity (1) has a water inlet and a water outlet at both ends along its length. The water inlet is equipped with a filter assembly (2) to block the slag in the screw conveyor. A first unidirectional conduction component (5) is disposed in the water passage cavity (1); The second unidirectional conduction component (6) is disposed in the water passage cavity (1). The first unidirectional conduction component (5) and the second unidirectional conduction component (6) are arranged at intervals along the length direction of the water passage cavity (1). The first unidirectional conduction component (5), the second unidirectional conduction component (6) and the water passage cavity (1) form a closed water transfer cavity. The water pressure chamber (3) is connected to the water transfer chamber. The water pressure chamber (3) is equipped with a suction assembly (4). The suction assembly (4) can suck air from the water transfer chamber into the water pressure chamber (3) or press air from the water pressure chamber (3) into the water transfer chamber. The first unidirectional conduction component (5) and the second unidirectional conduction component (6) both have a conduction direction from the water inlet to the water outlet.

2. The filtration and drainage device for a screw conveyor according to claim 1, characterized in that, The first unidirectional conduction component (5) includes: The first isolation plate (51) is sealed to the inner wall of the water passage cavity (1), and the first isolation plate (51) is provided with a first water passage hole (54). The first isolation element (52) is located in the water transfer cavity and can block the first water passage hole (54) along the length direction of the water passage cavity (1); The first elastic drive member (53) is connected to the first isolation member (52) and is fixed relative to the water passage cavity (1); The first isolation member (52) blocks the first water passage (54) under the elastic force of the first elastic drive member (53).

3. The filtration and drainage device for a screw conveyor according to claim 2, characterized in that, The first elastic drive member (53) is configured as a helical spring.

4. The filtration and drainage device for a screw conveyor according to claim 2, characterized in that, The first spacer (52) is constructed as a sphere; The first isolation plate (51) has a spherical protrusion that matches the shape of the first isolation member (52), and the first water passage hole (54) is located on the spherical protrusion.

5. The filtration and drainage device for a screw conveyor according to claim 1, characterized in that, The second unidirectional conduction component (6) includes: The second isolation plate (61) is sealed to the inner wall of the water passage cavity (1), and the second isolation plate (61) is provided with a second water passage hole (64); The second isolation element (62) is located between the second isolation plate (61) and the water outlet and can block the second water outlet (64) along the length of the water passage cavity (1); The second elastic drive member (63) is connected to the second isolation member (62) and is fixed relative to the water passage cavity (1); The second isolation member (62) blocks the second water passage (64) under the elastic force of the second elastic drive member (63).

6. The filtration and drainage device for a screw conveyor according to claim 5, characterized in that, The second elastic drive element (63) is configured as a helical spring.

7. The filtration and drainage device for a screw conveyor according to claim 5, characterized in that, The second spacer (62) is constructed as a sphere; The second isolation plate (61) has a spherical protrusion that matches the shape of the second isolation member (62), and the second water passage (64) is located on the spherical protrusion.

8. The filtration and drainage device for a screw conveyor according to claim 1, characterized in that, The suction component (4) includes: A suction piston (7) is located inside the water pressure chamber (3) and is movably sealed to the inner wall of the water pressure chamber (3); A reciprocating drive (8) is provided, with its fixed end fixed relative to the water pressure chamber (3) and its moving end connected to the suction piston (7) to drive the suction piston (7) to move back and forth within the water pressure chamber (3).

9. The filtration and drainage device for a screw conveyor according to claim 8, characterized in that, The reciprocating drive (8) is configured as a hydraulic cylinder.

10. The filtration and drainage device for a screw conveyor according to claim 8, characterized in that, The fixed end includes: Fixed base; Mounting base, the mounting base being used to connect the screw conveyor; A pin is inserted into both the mounting base and the fixed base so that the fixed base can rotate about the pin axis on the mounting base.

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