Roadheader stone screening box and slurry shield tunneling machine

Abstract

The utility model discloses a stone screening box of a heading machine and a slurry shield tunneling machine, and solves the problems that a passive stone screening box in the prior art is low in stone screening efficiency, small in stone storage space and difficult to discharge large-particle-size stone slag. The stone screening box of the heading machine comprises a first-stage screening box and a main box body which are communicated, the interior of the main box body is divided into a stone collecting area and a stone storage area through a partition plate, a slurry discharging pipe is arranged at the bottom of the stone collecting area, a stone discharging opening is formed in the bottom of the stone storage area, and a second-stage grating and a third-stage grating are sequentially arranged on the upper portion of the stone collecting area in the slurry inlet direction. A first-stage grid corresponding to the second-stage grid is arranged in the first-stage screening box, and a slag sliding groove in the bottom of the first-stage screening box faces the slurry discharging pipe. Three grilles are designed in the stone screening box, efficient grading of the particle size of slag stone is achieved through three-stage screening, and the problem that a passive screening stone screening box is low in screening efficiency is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel construction technical field, especially a kind of screen stone box. BACKGROUND

[0002] At present, slurry balance tunneling machine is widely used in crossing river, strait, water-rich stratum tunnel construction due to its high working pressure, good pressure control precision of working face, complex stratum and other advantages.Slurry balance tunneling machine in construction process, after cutting by cutterhead, the muck is mixed and stirred by slurry, and then enters the slurry circulation system, and is transported out of the tunnel.In the stratum excavation with large rock content, large particle size and high hardness, sometimes there will be the problem of pipe blockage and pump jamming, which causes the circulation system to fail to operate normally.

[0003] For the problem of large particle size muck pipe blockage and pump jamming, stone mining or breaking is usually used.When breaking is used, the jaw crusher works continuously in harsh environment and complex conditions, with low breaking efficiency, frequent faults, high maintenance cost and safety risks.

[0004] Compared with breaking, stone mining is more commonly used.The existing technology usually improves the smoothness of slurry circulation system operation by increasing the screen stone box according to the stratum condition.At present, the existing screen stone box mainly includes rock falling box, vertical grid type screen stone box, horizontal grid type screen stone box, stirring and screening type screen stone box and drum screening type screen stone box.The above five kinds of screen stone boxes have the following problems:①The muck screening is not sufficient, the screening efficiency is low, and the screen stone box is easy to be blocked;②The screen stone box has limited storage volume and small storage capacity, and the box needs to be opened frequently for stone mining, which is not suitable for the high-efficiency muck discharge requirement of slurry balance tunneling machine;③After the storage area of screen stone box is full, manual opening and cleaning are required, which is labor-intensive and complex. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the above background technology, the utility model provides a tunneling machine screen stone box and a slurry shield tunneling machine, which solves the problems of low muck screening efficiency, small storage space and difficulty in discharging large particle size muck in the passive screen stone box of the prior art.

[0006] The technical scheme of the utility model is achieved as follows: a tunneling machine stone screening box, which comprises a primary screening box and a main box body which are connected in communication, the main box body is divided into a stone collecting area and a stone storing area by a partition plate, a slurry discharge pipe is arranged at the bottom of the stone collecting area, a stone discharge opening is arranged at the bottom of the stone storing area, a secondary grid and a tertiary grid are sequentially arranged at the upper portion of the stone collecting area along the slurry inlet direction, a primary grid corresponding to the secondary grid is arranged in the primary screening box, and a slag chute at the bottom of the primary screening box faces the slurry discharge pipe. The stone screening box is designed with three grids, and through three-stage screening, efficient grading of the slag stone particle size is realized, and the screening efficiency is improved. The design concept of "separation of stone collecting and storing" is adopted to separate the box body into the stone collecting area and the stone storing area, the stone screening and discharging effect is improved, and the large-particle-size slag stone grading treatment efficiency of the slurry shield pipe discharging system is improved.

[0007] Further preferably, the slag chute is located below the primary grid and extends obliquely into the main box body and is connected with the slurry discharge pipe, the slurry inlet of the primary screening box is located above the primary grid, the stone outlet of the primary screening box faces the secondary grid, the grid aperture of the primary grid is smaller than that of the secondary grid, and the grid aperture of the tertiary grid is smaller than that of the secondary grid. The primary grid aperture is small, preliminary screening is realized, and mainly small-particle-size slag stones are screened out; the secondary grid aperture is large, deep screening is realized, and mainly large-particle-size slag stones are screened out; the tertiary grid guides the large-particle-size slag stones into the stone storing area and prevents small-particle-size slag stones from entering the stone storing area.

[0008] Further preferably, the slag chute is a groove body with an arc-shaped bottom surface, and flow guide baffles I and II are arranged on the two sides of the groove body; the slag slurry after the primary grid can smoothly reach the stone collecting area.

[0009] Further preferably, the partition plate in the main box body comprises an upper partition plate and a lower partition plate, the upper partition plate is arranged in the same length as the secondary grid, the lower partition plate is arranged in the same length as the tertiary grid and the secondary grid, a slag guide plate is arranged in the stone storing area of the main box body and is obliquely arranged towards the stone discharge opening, and the slag guide plate is located below the slag discharge opening of the tertiary grid.

[0010] Further preferably, the secondary grid is obliquely arranged downwards towards the upper partition plate, the tertiary grid is obliquely arranged downwards towards the lower partition plate, the inclination angle of the tertiary grid is larger than that of the secondary grid, and a shunt hole is arranged on the upper portion of the upper partition plate.

[0011] Further preferably, the main box body comprises a front box plate and a rear box plate, the primary screening box is connected to the front box plate, the slurry discharge pipe is connected to the rear box plate, and an inspection opening is arranged on the rear box plate; a buffer plate is obliquely arranged between the tertiary grid and the rear box plate; and the buffer plate prevents the large-particle-size slag stones from impacting and colliding with the rear box plate.

[0012] Further preferably, the main box body further comprises a left box plate and a right box plate, the stone discharge opening is arranged on the left box plate, the left box plate and the partition plate form a corresponding stone storing area, and the right box plate and the partition plate form a corresponding stone collecting area.

[0013] In a further preferred embodiment, the main housing also includes a bottom plate and a top plate. The front and rear sides of the bottom plate are connected to the front and rear housings respectively through inclined box plate II and inclined box plate I, forming a funnel-shaped structure. The right side of the bottom plate is connected to the partition extending out of the bottom of the main housing through inclined box plate III. The top plate is an arc-shaped plate.

[0014] In a further preferred embodiment, a flushing pipe is provided at the junction of the slag chute and the slurry discharge pipe, with the flushing port of the flushing pipe facing the front panel of the main box body.

[0015] A slurry shield tunneling machine includes the aforementioned tunneling machine screen box.

[0016] The beneficial effects of this utility model are as follows: The screening box of this utility model is designed with three types of grids, achieving efficient grading of slag and stone particle size through three-stage screening, thus solving the problem of low screening efficiency in passive screening boxes. Furthermore, this utility model adopts a double-box structure of a primary screening box and a main box. The primary screening box not only achieves graded screening but also further increases the overall stone storage space; moreover, the cross-sectional area of ​​the screening box gradually increases, enabling gradual deceleration and more thorough slag and stone screening.

[0017] This utility model adopts the design concept of "separation of mining and storage," dividing the box into a mining area and a storage area; functional zoning ensures good screening and discharging effects; and solves the problem of difficult discharge of large-diameter slag. The efficient screening capacity of this screening box makes the circulation system operate more smoothly, reduces downtime, significantly increases effective tunneling time, and improves the construction progress of slurry shield tunnels. Attached Figure Description

[0018] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main view of the stone sieve box of this utility model;

[0020] Figure 2 This is a left-side view of the stone sieving box of this utility model;

[0021] Figure 3 This is a right-side view of the stone sieving box of this utility model;

[0022] Figure 4 This is a top view of the stone sieving box of this utility model;

[0023] Figure 5 for Figure 1 View from AA direction;

[0024] Figure 6 Schematic diagram showing a stone screening box without a flushing pipe;

[0025] Figure 7 A schematic diagram showing the lower part of the main body of the stone screening box as a planar structure;

[0026] Figure 8 This is a schematic diagram of a stone screening box used in a slurry shield tunneling machine. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1, such as Figure 1 As shown, a tunneling machine screening box includes a primary screening box 2 and a main box 4 connected to each other. The primary screening box can achieve graded screening and further increase the overall stone storage space. The cross-section of the screening box increases step by step, which can achieve step-by-step deceleration and more thorough screening of slag and stone. The main box 4 is divided into a quarrying area 4-1 and a storage area 4-2 by a partition. Adopting the design concept of "separation of quarrying and storage", the box is divided into quarrying area and storage area. Quarrying area 4-1 corresponds to the screened mud and small-diameter slag, while storage area 4-2 corresponds to large-diameter slag. A slurry discharge pipe 13 is provided at the bottom of quarrying area 4-1 for discharging slurry and small-diameter slag. A stone discharge port 27 is provided at the bottom of storage area 4-2 for discharging slag and stone from the storage area. The upper part of the quarry area 4-1 is equipped with a secondary grid 7 and a tertiary grid 10 sequentially along the slurry inlet direction. The primary screening box 2 is equipped with a primary grid 3 corresponding to the secondary grid 7. The screening box is designed with three types of grids to achieve efficient classification of slag particle size through three-stage screening. The slag chute 2-1 at the bottom of the primary screening box 2 faces the slurry discharge pipe 13; the mud and slag liquid after primary grid screening enter the slurry discharge pipe of the quarry area through the slag chute for rapid discharge. In actual use, the slurry enters the primary screening box 2 through the inlet 1 at a certain speed. After being screened by the primary grid, the small-diameter slag falls into the bottom slag discharge channel. The slag that is not fully screened enters the main box 4. After being fully screened by the secondary grid 2, the large-diameter slag is guided into the stone storage area by the tertiary grid 10. The small-diameter slag after screening falls into the bottom slag discharge channel. After the stone storage area is full of slag, it is discharged through the stone discharge port. The small-diameter slag after screening by the primary, secondary and tertiary grids is discharged through the bottom slurry discharge port.

[0029] The embodiment 2 is shown in the embodiment 2, 4, a tunneling machine stone screening box, further optimized on the basis of the embodiment 1, the slag chute 2-1 in the embodiment is located below the first grid 3 and extends to the main box 4 and is connected with the slurry discharge pipe; the inclined slag chute facilitates the small particle size slag and slurry after screening to enter the stone mining area of the main box and is discharged through the slurry discharge pipe 13. The slurry inlet 1 of the first screening box 2 is located above the first grid 3, and the stone outlet of the first screening box 2 faces the second grid 7. The grid aperture of the first grid 3 is smaller than the grid aperture of the second grid 7, and the grid aperture of the third grid 10 is smaller than the grid aperture of the second grid 7; the grid apertures of the first grid and the third grid can be the same. The first grid aperture is small, which realizes preliminary screening and mainly screens out small particle size slag; the second grid aperture is large, which realizes deep screening and mainly screens out large particle size slag; the third grid guides the large particle size slag to enter the stone storage area and prevents small particle size slag from entering the stone storage area.

[0030] As shown in the embodiment 3, 5, specifically, the slag chute 2-1 is a groove body with an arc-shaped bottom surface, which facilitates the smooth flow of slurry, and the groove body is provided with a flow guide baffle I 25 and a flow guide baffle II 26 on both sides respectively; the flow guide baffles I 25 and II 26 ensure that the slag slurry after the first grid reaches the stone mining area smoothly and can be discharged through the slurry discharge pipe.

[0031] Further preferably, the partition plate in the main box 4 includes an upper partition plate 22 and a lower partition plate 20, the upper partition plate 22 is provided with the same length as the second grid 7; the upper partition plate 22 cooperates with the second grid to form a second screening cavity for screening large particle size slag; the lower partition plate 20 is provided with the same length as the third grid 10+second grid 7, and the lower partition plate 20 cooperates with the third grid 10 and the second grid 7 to form a third screening and large particle size slag flow guide opening; the large particle size slag after the second screening cavity enters the third grid for further screening, the large particle size slag enters the stone storage area through the third grid, and the small particle size slag falls into the stone mining area. The stone storage area 4-2 of the main box 4 is provided with a slag guide plate 12 inclined towards the stone discharge port 27, and the slag guide plate 12 is located below the third grid 10 discharge port; the setting of the slag guide plate 12 can not only make the large particle size slag enter the stone storage area smoothly, but also buffer the impact force of the large particle size slag, realizing the protection of the box.

[0032] In the embodiment, as preferred, the second grid 7 is inclined downward towards the upper partition plate 22, which increases the contact area of the slag and the second grid, achieving the purpose of sufficient screening. The third grid 10 is inclined downward towards the lower partition plate 20; increasing the contact area facilitates the rapid sliding of the large particle size slag to the stone storage area. The inclination angle of the third grid 10 is greater than that of the second grid 7; ensuring that the sliding speed of the large particle size slag is greater than the screening speed, preventing the occurrence of slag blockage.

[0033] The embodiment 3 is shown in the embodiment 3, 4, a tunneling machine stone screening box, further optimized on the basis of the embodiment 1, the slag chute 2-1 in the embodiment is located below the first grid 3 and extends to the main box 4 and is connected with the slurry discharge pipe; the inclined slag chute facilitates the small particle size slag and slurry after screening to enter the stone mining area of the main box and is discharged through the slurry discharge pipe 13. The slurry inlet 1 of the first screening box 2 is located above the first grid 3, and the stone outlet of the first screening box 2 faces the second grid 7. The grid aperture of the first grid 3 is smaller than the grid aperture of the second grid 7, and the grid aperture of the third grid 10 is smaller than the grid aperture of the second grid 7; the grid apertures of the first grid and the third grid can be the same. The first grid aperture is small, which realizes preliminary screening and mainly screens out small particle size slag; the second grid aperture is large, which realizes deep screening and mainly screens out large particle size slag; the third grid guides the large particle size slag to enter the stone storage area and prevents small particle size slag from entering the stone storage area. Figure 1As shown, a tunneling machine stone screening box is further optimized on the basis of embodiments 1 or 2. In this embodiment, the main box body 4 includes a front box plate 5 and a rear box plate 8. The first screening box 2 is connected to the front box plate 5, and the slurry discharge pipe 13 is connected to the rear box plate 8, with the slurry discharge port 28 of the slurry discharge pipe 13 extending out of the rear box plate 8. A maintenance opening 9 is provided on the rear box plate 8 to facilitate quick maintenance of the interior. A buffer plate 11 is provided between the three-stage grating 10 and the rear box plate 8 and is inclined to buffer the impact of large-diameter slag stones on the rear box plate during backward flow, thereby protecting the box body.

[0034] In this embodiment, the main box body 4 also includes a left box plate 21 and a right box plate 24. The stone discharge port 27 is provided on the left box plate 21, and the upper portion of the upper partition plate is provided with a shunt hole 6 for shunting the mud in the upper portion of the stone extraction area. The left box plate 21 and the partition plate form a corresponding stone storage area 4-2, and the right box plate 24 and the partition plate form a corresponding stone extraction area 4-1. That is, the stone storage area is located to the left of the partition plate, and the stone extraction area is located to the right of the partition plate. The stone extraction and storage are divided into zones, and the stone screening and discharging effect is good.

[0035] In this embodiment, the main box body 4 also includes a bottom plate 15 and a top plate 23. The top plate 23 is an arc-shaped plate to increase the screening and stone storage space. The front and rear sides of the bottom plate 15 are connected to the front box plate 5 and the rear box plate 8 through inclined box plates II 16 and I 14, respectively. The right side of the bottom plate 15 is connected to the partition plate extending out of the bottom of the main box body 4 through an inclined box plate III 19. The inclined box plates I 14, II 16, and III 19 form a funnel shape at the lower portion of the box body, facilitating the smooth discharge of slag stones through the stone discharge port. Of course, according to needs, the lower portion of the main box body 4 can also not be formed into a funnel shape, and the function of discharging slag stones can still be achieved, as described in Figure 7 .

[0036] In this embodiment, a flushing pipe 17 is provided at the junction of the slag chute 2-1 and the slurry discharge pipe 13 as needed. The flushing port 18 of the flushing pipe 17 faces the front box plate 5 of the main box body 4. In actual use, the flushing port is connected to an external high-pressure water source. When sedimentation or other conditions occur at the corresponding position of the slag chute 2-1 and the slurry discharge pipe 13, the external high-pressure water source enters through the flushing pipe to flush it, thereby avoiding blockage. Of course, according to needs, the flushing pipe 17 can also not be provided, as described in Figure 6 .

[0037] Embodiment 4, as shown in 8, a slurry shield tunneling machine includes the tunneling machine stone screening box described in embodiments 1 or 2 or 3. The stone screening box is provided in the slurry circulating system of the slurry shield tunneling machine. The large-diameter slag stone classification processing efficiency of the slurry shield tunneling machine pipeline slag discharge system is improved. In addition, the tunneling efficiency of the tunneling machine and the tunnel construction progress are improved.

[0038] Compared with the prior art, the above-mentioned tunneling machine stone screening box solves the problems of low screening efficiency and difficult discharge of large-diameter residue stones of the passive screening stone screening box. The efficient screening capacity of the stone screening box makes the circulation system run more smoothly, reduces the number of shutdowns, greatly improves the effective tunneling time, and improves the progress of the slurry shield tunnel construction.

[0039] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mucking box for a roadheader, characterized in that: The application relates to a stone separating device, which comprises a primary screening box (2) and a main box body (4) in communication, the main box body (4) is divided into a stone collecting area (4-1) and a stone storing area (4-2) by a partition plate, a slurry discharging pipe (13) is arranged at the bottom of the stone collecting area (4-1), a stone discharging opening (27) is arranged at the bottom of the stone storing area (4-2), a secondary grid (7) and a tertiary grid (10) are sequentially arranged at the upper portion of the stone collecting area (4-1) along the slurry feeding direction, a primary grid (3) corresponding to the secondary grid (7) is arranged in the primary screening box (2), and a slag chute (2-1) at the bottom of the primary screening box (2) is directed towards the slurry discharging pipe (13).

2. A jumbo stone screen box according to claim 1, characterised in that: The slag chute (2-1) is located below the primary grid (3), extends into the main box body (4) in an inclined mode and is connected with the slurry discharging pipe (13), the slurry inlet (1) of the primary screening box (2) is located above the primary grid (3), the stone outlet of the primary screening box (2) is directed towards the secondary grid (7), the grid aperture of the primary grid (3) is smaller than that of the secondary grid (7), and the grid aperture of the tertiary grid (10) is smaller than that of the secondary grid (7).

3. A jumbo stone screen box according to claim 2, characterised in that: The slag chute (2-1) is a groove body with an arc-shaped bottom surface, and flow guide baffles I (25) and II (26) are arranged at the two sides of the groove body respectively.

4. The stone screening box of the heading machine according to any one of claims 1-3, characterized in that: The partition plate in the main box body (4) comprises an upper partition plate (22) and a lower partition plate (20), the upper partition plate (22) is arranged in the same length as the secondary grid (7), the lower partition plate (20) is arranged in the same length as the tertiary grid (10) and the secondary grid (7), a slag guide plate (12) is arranged in the stone storing area (4-2) of the main box body (4) and is arranged in an inclined mode towards the stone discharging opening (27), and the slag guide plate (12) is located below the slag outlet of the tertiary grid (10).

5. A development machine stone screening box according to claim 4, characterised in that: The secondary grid (7) is arranged in an inclined mode downwards towards the upper partition plate (22), the tertiary grid (10) is arranged in an inclined mode downwards towards the lower partition plate (20), the inclination angle of the tertiary grid (10) is larger than that of the secondary grid (7), and a shunt hole (6) is arranged at the upper portion of the upper partition plate (22).

6. The stone screening box of the heading machine according to claim 1 or 5, characterized in that: The main box body (4) comprises a front box plate (5) and a rear box plate (8), the primary screening box (2) is connected to the front box plate (5), the slurry discharging pipe (13) is connected to the rear box plate (8), and a maintenance opening (9) is arranged on the rear box plate (8); a buffer plate (11) is arranged in an inclined mode between the tertiary grid (10) and the rear box plate (8).

7. The jumbo stone screen box of claim 6, wherein: The main box body (4) further comprises a left box plate (21) and a right box plate (24), the stone discharging opening (27) is arranged on the left box plate (21), the left box plate (21) forms a corresponding stone storing area (4-2) with the partition plate, and the right box plate (24) forms a corresponding stone collecting area (4-1) with the partition plate.

8. The jumbo stone screening box according to claim 7, characterized in that: The main box body (4) further comprises a bottom plate (15) and a top plate (23), the front and rear sides of the bottom plate (15) are connected to the front box plate (5) and the rear box plate (8) through inclined box plates II (16) and I (14) respectively and form a funnel-shaped structure, the right side of the bottom plate (15) is connected to the bottom of the main box body (4) through an inclined box plate III (19) and the partition plate, and the top plate (23) is an arc-shaped plate.

9. The stone screening box of the heading machine according to claim 1 or 7, characterized in that: The flushing pipe (17) is arranged at the intersection of the slag channel (2-1) and the slurry discharge pipe (13), and the flushing opening (18) of the flushing pipe (17) faces the front box plate (5) of the main box body (4).

10. A slurry shield machine characterized by: The tunneling machine stone screening box comprises the tunneling machine stone screening box according to any one of claims 1-9.

Images