A stone extraction device

Abstract

The application discloses a kind of stone collecting devices, belong to pipeline conveying technical field, to solve the problem that existing passive stone collecting device is easy to block, the stone collecting device includes main slurry discharge pipeline (1), first rockfall pipeline (2) and first stone storage tank (3), main slurry discharge pipeline (1) contains main slurry inlet section (11) and main slurry discharge section (12), the upper end of first rockfall pipeline (2) is connected with main slurry discharge pipeline (1), the upper end of first rockfall pipeline (2) is located between the inlet (121) of main slurry discharge section and the outlet (112) of main slurry inlet section, the lower end of first rockfall pipeline (2) is connected with the inlet of first stone storage tank (3), and the first filter grid (4) is arranged at the inlet (121) of main slurry discharge section. First rockfall pipeline and first stone storage tank are arranged before first filter grid, and large-diameter slag stone can be filtered out and enter first stone storage tank through first rockfall pipeline, which not only can avoid blockage, but also can improve screening efficiency.

Description

Technical Field

[0001] This invention relates to the field of pipeline transportation technology, specifically a quarrying device. Background Technology

[0002] The slurry circulation system plays a crucial role in transporting excavated soil from slurry shield tunneling machines. Its proper functioning determines whether the slurry shield tunneling machine can proceed smoothly. Slurry shield tunneling machines are widely adaptable to various geological formations, hence their widespread use. However, in rock and gravel formations where large-diameter excavated stones are present, the slurry pump is prone to blockage and jamming. A blocked slurry pump requires dismantling and unblocking, significantly impacting construction progress. Therefore, a quarrying device needs to be installed before the slurry pump. This device must filter out excavated stones with a diameter larger than the maximum diameter of the slurry pump, while allowing smaller-diameter stones to pass through as much as possible.

[0003] In recent years, there has been considerable research on quarrying devices using slurry circulation systems within the industry. These devices are mainly divided into two categories: passive quarrying devices, i.e., those without a power source, such as the "A Quarrying Box for a Tunnel Boring Machine" published by patent number CN216714389U on June 10, 2022; and active quarrying devices, i.e., those with a power source. Examples include Chinese patent CN211027004U, published on July 17, 2020, which discloses an "Active Screening Device for Slurry Balance Shield Tunnel Boring Machines," and Chinese patent CN107227960A, published on October 3, 2017, which discloses a "Slurry Shield Tunnel Mixing and Screening Quarrying Box," both of which are active quarrying devices.

[0004] The disadvantages of the aforementioned passive quarrying device are that the grating is prone to clogging, requiring frequent cleaning of the slag. The disadvantages of the aforementioned active quarrying device are that it is more expensive, has a more complex structure, the power machinery is prone to being jammed by slag, the seals are prone to leakage, and maintenance is difficult and costly. Summary of the Invention

[0005] To address the problem of easy clogging in the aforementioned passive quarrying devices, this invention provides a quarrying device in which a first rockfall pipe and a first rock storage box are provided before the first filter grid. Large-diameter slag can be filtered out and enter the first rock storage box through the first rockfall pipe, which not only avoids clogging but also improves screening efficiency.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A quarrying device includes a main slurry discharge pipe, a first rockfall pipe, and a first rock storage box. The main slurry discharge pipe comprises a main slurry inlet section and a main slurry discharge section arranged sequentially. The first rockfall pipe is in an upright or inclined state. The upper end of the first rockfall pipe is connected to the main slurry discharge pipe. The upper end of the first rockfall pipe is located between the inlet of the main slurry discharge section and the outlet of the main slurry inlet section. The lower end of the first rockfall pipe is connected to the inlet of the first rock storage box. A first filter screen is provided at the inlet of the main slurry discharge section.

[0008] The beneficial effects of the above technical solution are: by setting a first rockfall pipe and a first rock storage box before the first filter grid, the large-diameter slag can be filtered out and enter the first rock storage box through the first rockfall pipe, which can not only avoid clogging, but also improve screening efficiency.

[0009] The inlet of the main discharge section and the outlet of the main feed section are spaced apart to the left and right. In the vertical direction, the inlet of the main discharge section is lower than the outlet of the main feed section. The trajectory of the slag after leaving the outlet of the main feed section is a parabola, and the inlet of the main discharge section is located at the end of the parabola.

[0010] The first filter grid is detachably connected to the main discharge section; the first filter grid contains at least one filter baffle, which can be in one or more of the following states: horizontal, inclined, or vertical.

[0011] The inner diameter of the first rockfall pipe is greater than or equal to the inner diameter of the main slurry inlet section, and the lower end of the first rockfall pipe is detachably connected to the inlet of the first rock storage box.

[0012] The first stone storage box is equipped with a slag quantity measuring device and a slag cleaning port. The slag quantity measuring device is located at the top of the first stone storage box, and the slag cleaning port is located at the bottom of the first stone storage box.

[0013] The quarrying device also includes a bypass pipe, the inlet end of which is connected to the main slurry inlet section and the outlet end of which is connected to the main slurry outlet section. A first ball valve is installed on the bypass pipe.

[0014] A second ball valve is installed on the main slurry inlet section, located between the inlet end of the bypass pipe and the outlet of the main slurry inlet section. A third ball valve is installed on the main slurry outlet section, located between the outlet end of the bypass pipe and the inlet of the main slurry outlet section.

[0015] The quarrying device also includes a second rockfall pipe and a second rock storage box. The bypass pipe contains a side slurry inlet section and a side slurry outlet section arranged in sequence. The second rockfall pipe is in an upright or inclined state. The upper end of the second rockfall pipe is connected to the bypass pipe. The upper end of the second rockfall pipe is located between the inlet of the side slurry outlet section and the outlet of the side slurry inlet section. The lower end of the second rockfall pipe is connected to the inlet of the second rock storage box. A second filter screen is provided at the inlet of the side slurry outlet section.

[0016] The inlet of the side discharge section and the outlet of the side feed section are spaced apart to the left and right. In the vertical direction, the inlet of the side discharge section is lower than the outlet of the side feed section. When the slag leaves the outlet of the side feed section, the trajectory is a parabola, and the inlet of the side discharge section is located at the end of the parabola.

[0017] The second filter screen is detachably connected to the side discharge section. The first filter screen has the same structure as the second filter screen. The first rockfall pipe has the same structure as the second rockfall pipe. The first rock storage box has the same structure as the second rock storage box.

[0018] The beneficial effects of this invention are:

[0019] 1. Simple structure, low cost, and replaceable grille.

[0020] 2. By utilizing the mixing and movement characteristics of slag and mud, the slag screening efficiency is improved, the amount of small-diameter slag entering the first slag storage box is reduced, and the cleaning frequency of the first slag storage box is reduced. This not only prevents pipe blockage and pump jamming, but also improves tunneling efficiency.

[0021] 3. When two quarrying devices are set up in parallel, the service life of the quarrying devices can be extended, and the working time of the quarrying devices can also be extended. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a schematic diagram of the quarrying device described in Embodiment 1 of the present invention.

[0024] Figure 2 It is along Figure 1 A schematic diagram of the direction A in the middle.

[0025] Figure 3 It is along Figure 1 A schematic diagram of the B direction.

[0026] Figure 4 This is a schematic diagram of the first type of first filter grid.

[0027] Figure 5 This is a schematic diagram of the second type of first filter grid.

[0028] Figure 6 This is a schematic diagram of the third type of first filter grid.

[0029] Figure 7 This is a schematic diagram of the fourth type of first filter grid.

[0030] Figure 8This is a schematic diagram of the quarrying device described in this invention in Embodiment 2.

[0031] The annotations in the attached figures are explained as follows:

[0032] 1. Main slurry discharge pipe; 2. First rockfall pipe; 3. First rock storage tank; 4. First filter screen; 5. Bypass pipe; 6. Second rockfall pipe; 7. Second rock storage tank; 8. Second filter screen;

[0033] 11. Main slurry inlet section; 12. Main slurry outlet section;

[0034] 31. Slag and stone quantity measuring device; 32. Slag cleaning port;

[0035] 41. Filter baffle; 42. Frame plate;

[0036] 51. First ball valve; 52. Side slurry inlet section; 53. Side slurry outlet section;

[0037] 111. Inlet of the main feed section; 112. Outlet of the main feed section; 113. Second ball valve;

[0038] 121. Inlet of the main slurry discharge section; 122. Outlet of the main slurry discharge section; 123. Third ball valve;

[0039] 521. Outlet of the side slurry inlet section; 531. Inlet of the side slurry outlet section. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] Example 1

[0042] A quarrying apparatus includes a main slurry discharge pipe 1, a first rockfall pipe 2, and a first rock storage tank 3. The main slurry discharge pipe 1 comprises a main slurry inlet section 11 and a main slurry discharge section 12 arranged sequentially. The first rockfall pipe 2 is in an upright or inclined state. The upper end of the first rockfall pipe 2 is connected to the main slurry discharge pipe 1, and the upper end of the first rockfall pipe 2 is located between the inlet 121 of the main slurry discharge section and the outlet 112 of the main slurry inlet section. The lower end of the first rockfall pipe 2 is connected to the inlet of the first rock storage tank 3. A first filter screen 4 is provided at the inlet 121 of the main slurry discharge section. Figure 1 As shown.

[0043] The mixture of slag and mud enters the main discharge pipe 1 from the inlet 111 of the main slurry inlet section, and the mixture of slag and mud is discharged from the main discharge pipe 1 from the outlet 122 of the main discharge section. The connection between the first rockfall pipe 2 and the main discharge pipe 1 is located between the inlet 121 of the main discharge section and the outlet 112 of the main inlet section. The upper end of the first rockfall pipe 2 is located upstream of the first filter grid 4. The first filter grid 4 can block large-diameter slag from passing through. The large-diameter slag filtered out by the first filter grid 4 can enter the first stone storage box 3 through the first rockfall pipe 2. This not only avoids slag blockage at the first filter grid 4, but also improves screening efficiency.

[0044] In this embodiment, the main slurry discharge pipe 1 is generally horizontal. The inlet 111 of the main slurry inlet section is the inlet of the main slurry discharge pipe 1, and the outlet 122 of the main slurry discharge section is the outlet of the main slurry discharge pipe 1. The inlet 121 of the main slurry discharge section and the outlet 112 of the main slurry inlet section are spaced apart from each other on the left and right. In the vertical direction, the inlet 121 of the main slurry discharge section is lower than the outlet 112 of the main slurry inlet section.

[0045] The trajectory of the slag after leaving the outlet 112 of the main slurry inlet section is a parabola. The slag moves along this parabola from the outlet 112 to the inlet 121 of the main slurry discharge section. The starting point of the parabola is located within the outlet 112 of the main slurry inlet section, and the ending point is located within the inlet 121 of the main slurry discharge section. During the parabolic flight from the outlet 112 to the inlet 121 of the main slurry discharge section, the slag will not collide with the inner surface of the main slurry discharge pipe 1, and the inner surface of the main slurry discharge pipe 1 will not obstruct or hinder the slag from moving along the parabola from the outlet 112 to the inlet 121 of the main slurry discharge section. The outlet 112 of the main slurry inlet section faces left, and the inlet 121 of the main slurry discharge section faces upward to the right to facilitate slurry entry.

[0046] This design takes into account the movement characteristics of slag and stone in the main discharge pipe 1 under the carrying of mud. The inlet 121 of the main discharge section is lower than the outlet 112 of the main feed section, which can receive slag and stone that exhibits parabolic motion. A vertical first filter grid 4 is designed at the inlet 121 of the main discharge section to separate slag and stone of different diameters and separate large-diameter slag and stone into the first storage box 3, thereby improving the screening efficiency of slag and stone and reducing the cleaning frequency of the first storage box.

[0047] To facilitate maintenance and replacement of the first filter screen 4, the first filter screen 4 is detachably connected to the main discharge section 12. The main discharge section 12 is provided with a screen mounting port, through which the first filter screen 4 can enter the main discharge section 12. A flange can be provided at the screen mounting port, such as... Figure 2 As shown.

[0048] The advantages of having a detachable first filter screen 4 are: 1. When the first filter screen 4 is clogged, it can be disassembled for unblocking; 2. When the first filter screen 4 is damaged, it can be easily disassembled and repaired; 3. When there are other requirements for the particle size, the first filter screen 4 can be disassembled and the screen type replaced. The first filter screen 4 can have various configurations as needed.

[0049] The first filter grid 4 includes a frame plate 42, filter through holes, and at least one filter baffle 41. The filter baffle 41 can be horizontal, inclined, or vertical, or in one or more other ways. Figures 4 to 7 As shown. Different types of grids and specific dimensions and structures of filter holes can be adopted depending on the maximum diameter of the slag that the slurry pump can pass through. Flanges are provided at the ends of the frame plate 42, and the frame plate 42 can be connected to the main slurry discharge section 12 through the flanges.

[0050] In this embodiment, the inner diameter of the main discharge section 12 can be equal to the inner diameter of the main inlet section 11. The cross-section of the main inlet section 11 can be circular or archway-shaped. The cross-section of the main discharge section 12 can be circular or archway-shaped. The inner diameter of the first rockfall pipe 2 can be greater than or equal to the inner diameter of the main inlet section 11. The first rockfall pipe 2 is in an upright state, and the width of the first rockfall pipe 2 is equal to the distance between the inlet 121 of the main discharge section and the outlet 112 of the main inlet section.

[0051] To facilitate maintenance and installation of the first rock storage tank 3, the lower end of the first rockfall pipe 2 is detachably connected to the inlet of the first rockfall tank 3. For example, a flange is provided at the lower end of the first rockfall pipe 2, and a flange is provided at the inlet of the first rockfall tank 3; the lower end of the first rockfall pipe 2 is connected to the inlet of the first rockfall tank 3 via the flange. Figure 3 As shown.

[0052] In this embodiment, the first stone storage tank 3 is equipped with a slag quantity measuring device 31 and a slag cleaning port 32. The slag quantity measuring device 31 is located at the upper part of the first stone storage tank 3, and the slag cleaning port 32 is located at the lower part of the first stone storage tank 3. The amount of slag collected in the first stone storage tank 3 can be determined by the slag quantity measuring device 31, which can be a pressure sensor. The slag cleaning port 32 is connected to an electric switch device.

[0053] In this embodiment, the quarrying device further includes a bypass pipe 5. The inlet end of the bypass pipe 5 is connected to the main slurry inlet section 11, and the outlet end of the bypass pipe 5 is connected to the main slurry discharge section 12. A first ball valve 51 is installed on the bypass pipe 5. A second ball valve 113 is installed on the main slurry inlet section 11, located between the inlet end of the bypass pipe 5 and the outlet 112 of the main slurry inlet section. A third ball valve 123 is installed on the main slurry discharge section 12, located between the outlet end of the bypass pipe 5 and the inlet 121 of the main slurry discharge section. Figure 1 As shown.

[0054] The quarrying device also includes a control system (or control unit), and the slag quantity measuring device 31, the electric switch device, the first ball valve 51, the second ball valve 113 and the third ball valve 123 are all connected to the control system (or control unit).

[0055] The working process of the quarrying device is described below.

[0056] The mixture of mud and slag enters from the inlet of the main discharge pipe 1. Due to gravity, the slag moves at the bottom of the main discharge pipe 1. After leaving the outlet 112 of the main slurry inlet section, the slag moves in a parabolic motion and eventually enters the inlet 121 of the main discharge section. At this time, small-diameter slag passes smoothly into the main discharge section 12, while large-diameter slag is blocked by the first filter screen 4 and enters the first rockfall pipe 2. Due to gravity, the large-diameter slag moves downward along the first rockfall pipe 2 and is eventually stored in the first rock storage box 3.

[0057] The slag quantity measuring device 31 on the first slag storage box 3 can detect the accumulation height of the slag in the first slag storage box 3. The slag quantity measuring device 31 is connected to the control system (or control unit). When the slag accumulates to a certain height, the control system (or control unit) will prompt the personnel to open the box for cleaning. Under the supervision of the staff, the system, according to the built-in program, first opens the first ball valve 51 of the bypass pipe 5, and then closes the second ball valve 113 and the third ball valve 123. At this time, the operator places the slag cleaning trolley outside the slag cleaning port 32, and the control system will open the slag cleaning port 32 on the first slag storage box 3 to clean the slag in the first slag storage box 3 onto the trolley.

[0058] After the slag and rock are cleared, the system first closes the slag removal port 32 according to the program sequence, then opens the second ball valve 113 and the third ball valve 123, and finally closes the first ball valve 51. The bypass pipe 5 can not only temporarily ensure the normal tunneling of the tunnel boring machine during slag removal, but can also be used when the quarrying equipment needs maintenance.

[0059] Example 2

[0060] This embodiment is an improvement on Embodiment 1. The main difference between this embodiment and Embodiment 1 is that the quarrying device further includes a second rockfall pipe 6 and a second rock storage tank 7. The bypass pipe 5 contains a side slurry inlet section 52 and a side slurry outlet section 53 arranged sequentially. The second rockfall pipe 6 is in an upright or inclined state. The upper end of the second rockfall pipe 6 is connected to the bypass pipe 5. The upper end of the second rockfall pipe 6 is located between the inlet 531 of the side slurry outlet section and the outlet 521 of the side slurry inlet section. The lower end of the second rockfall pipe 6 is connected to the inlet of the second rock storage tank 7. A second filter grid 8 is provided at the inlet 531 of the side slurry outlet section. Figure 8 As shown.

[0061] This embodiment is equivalent to having two quarrying devices as described in Embodiment 1 connected in parallel, that is, the main slurry discharge pipe 1, the first rockfall pipe 2, and the first rock storage tank 3 connected in parallel, with only one quarrying device used during construction. This design has the following advantages: 1. When one quarrying device is clearing slag, the other quarrying device can be used; 2. If one quarrying device is blocked or damaged, the other quarrying device can be used for a long time; 3. Compared with the bypass pipe in Embodiment 1, the quarrying device described in this embodiment is less prone to blockage.

[0062] In this embodiment, the inlet 531 of the side discharge section and the outlet 521 of the side feed section are spaced apart from each other. In the vertical direction, the inlet 531 of the side discharge section is lower than the outlet 521 of the side feed section. When the slag leaves the outlet 521 of the side feed section, the trajectory is a parabola, and the inlet 531 of the side discharge section is located at the end of the parabola.

[0063] The trajectory of the slag after leaving the outlet 521 of the side slurry inlet section is a parabola. The slag moves along the parabola from the outlet 521 of the side slurry inlet section to the inlet 531 of the side slurry outlet section. The starting point of the parabola is located inside the outlet 521 of the side slurry inlet section, and the ending point of the parabola is located inside the inlet 531 of the side slurry outlet section. During the process of the slag flying along the parabola from the outlet 521 of the side slurry inlet section to the inlet 531 of the side slurry outlet section, the slag will not collide with the inner surface of the bypass pipe 5, and the inner surface of the bypass pipe 5 will not obstruct or hinder the slag from flying along the parabola from the outlet 521 of the side slurry inlet section to the inlet 531 of the side slurry outlet section. The outlet 521 of the side slurry inlet section faces left, and the inlet 531 of the side slurry outlet section faces upward to the right to facilitate the entry of slurry.

[0064] In this embodiment, the second filter grid 8 is detachably connected to the side discharge section 53, the first filter grid 4 has the same structure as the second filter grid 8, the first rockfall pipe 2 has the same structure as the second rockfall pipe 6, and the first rock storage box 3 has the same structure as the second rock storage box 7.

[0065] All other technical features in this embodiment are the same as those in Embodiment 1. If there is anything you do not understand, please refer to Embodiment 1. To save space, this embodiment will not be described in detail.

[0066] Furthermore, for ease of understanding and description, this invention uses absolute positional relationships for description. Unless otherwise specified, the directional term "above" indicates... Figure 1 The direction above, the directional word "down" indicates Figure 1 The lower side of the middle, the directional word "left" indicates Figure 1 The left side of the direction, the directional word "right" indicates Figure 1The direction is to the right. This invention is described from the perspective of a user or reader, but the above directional terms should not be understood or interpreted as limiting the scope of protection of this invention.

[0067] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent should still fall within the scope of this patent. Furthermore, the technical features, technical solutions, and embodiments of the present invention can be freely combined and used together.

Claims

1. A quarrying device, characterized in that, The quarrying device includes a main slurry discharge pipe (1), a first rockfall pipe (2), and a first rock storage box (3). The main slurry discharge pipe (1) includes a main slurry inlet section (11) and a main slurry discharge section (12) arranged in sequence. The first rockfall pipe (2) is in an upright or inclined state. The upper end of the first rockfall pipe (2) is connected to the main slurry discharge pipe (1). The upper end of the first rockfall pipe (2) is located between the inlet (121) of the main slurry discharge section and the outlet (112) of the main slurry inlet section. The lower end of the first rockfall pipe (2) is connected to the inlet of the first rock storage box (3). A first filter grid (4) is provided at the inlet (121) of the main slurry discharge section. The quarrying device also includes a bypass pipe (5), the inlet end of which is connected to the main slurry inlet section (11), the outlet end of which is connected to the main slurry outlet section (12), and a first ball valve (51) is provided on the bypass pipe (5). A second ball valve (113) is installed on the main slurry inlet section (11). The second ball valve (113) is located between the inlet end of the bypass pipe (5) and the outlet (112) of the main slurry inlet section. A third ball valve (123) is installed on the main slurry outlet section (12). The third ball valve (123) is located between the outlet end of the bypass pipe (5) and the inlet (121) of the main slurry outlet section. The quarrying device also includes a second rockfall pipe (6) and a second rock storage box (7). The bypass pipe (5) contains a side slurry inlet section (52) and a side slurry outlet section (53) arranged in sequence. The second rockfall pipe (6) is in an upright or inclined state. The upper end of the second rockfall pipe (6) is connected to the bypass pipe (5). The upper end of the second rockfall pipe (6) is located between the inlet (531) of the side slurry outlet section and the outlet (521) of the side slurry inlet section. The lower end of the second rockfall pipe (6) is connected to the inlet of the second rock storage box (7). A second filter grid (8) is provided at the inlet (531) of the side slurry outlet section. The inlet (531) of the side discharge section and the outlet (521) of the side feed section are spaced apart on the left and right. In the vertical direction, the inlet (531) of the side discharge section is lower than the outlet (521) of the side feed section. When the slag leaves the outlet (521) of the side feed section, the trajectory is a parabola, and the inlet (531) of the side discharge section is located at the end of the parabola.

2. The quarrying apparatus according to claim 1, characterized in that, The inlet (121) of the main discharge section and the outlet (112) of the main feed section are spaced apart on the left and right. In the vertical direction, the inlet (121) of the main discharge section is lower than the outlet (112) of the main feed section. When the slag leaves the outlet (112) of the main feed section, the trajectory is a parabola, and the inlet (121) of the main discharge section is located at the end of the parabola.

3. The quarrying apparatus according to claim 1, characterized in that, The first filter grid (4) is detachably connected to the main discharge section (12); the first filter grid (4) contains at least one filter baffle (41), which is in one or more of the following states: horizontal, inclined or vertical.

4. The quarrying apparatus according to claim 1, characterized in that, The inner diameter of the first rockfall pipe (2) is greater than or equal to the inner diameter of the main slurry inlet section (11), and the lower end of the first rockfall pipe (2) is detachably connected to the inlet of the first rock storage box (3).

5. The quarrying apparatus according to claim 4, characterized in that, The first stone storage box (3) is equipped with a slag quantity measuring device (31) and a slag cleaning port (32). The slag quantity measuring device (31) is located at the top of the first stone storage box (3), and the slag cleaning port (32) is located at the bottom of the first stone storage box (3).

6. The quarrying apparatus according to claim 1, characterized in that, The second filter screen (8) is detachably connected to the side discharge section (53). The structure of the first filter screen (4) is the same as that of the second filter screen (8). The structure of the first rockfall pipe (2) is the same as that of the second rockfall pipe (6). The structure of the first rock storage box (3) is the same as that of the second rock storage box (7).

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