Quarrying box, slag stone transportation system and heading machine

Abstract

The utility model provides a quarrying box, a stone slag transportation system and a tunneling machine, and belongs to the technical field of tunneling equipment. The quarrying box comprises a box body, a screening conveying mechanism is arranged in the box body, the screening conveying mechanism is provided with a feeding end and a discharging end, a stone storage box is connected to the position, corresponding to the discharging end, of the box body, a feeding box is connected to the position, corresponding to the feeding end, of the top of the box body, and the feeding box communicates with the feeding end. The feeding box is provided with a connector which is arranged towards the discharging end and used for being connected with a slurry inlet pipe, the feeding box is further provided with a buffering wall which is arranged right opposite to the connector and used for allowing entering slurry to impact so as to buffer the slurry, and the entering slurry enters the feeding end of the screening and conveying mechanism after the speed of the entering slurry is reduced. By arranging the screening and conveying mechanism, small stones can effectively pass through the screening and conveying mechanism, large stones are effectively intercepted and conveyed in the direction of the discharging end, the situation that the stone storage box is filled with the stones quickly is avoided, work inconvenience caused by frequent stone discharging is reduced, and meanwhile the function that the quarrying box only screens the large stones originally is improved.

Description

A quarry box, a slag transport system and a tunneling machine Technical Field

[0001] This utility model relates to a quarry box, a slag transport system, and a tunneling machine, belonging to the technical field of tunnel excavation equipment. Background Technology

[0002] In slurry shield tunneling, strata with a high rock content are often encountered. When the rock particles are large, they are difficult to be discharged from the tunnel with the slurry circulation system, which can cause pipe blockage and pump jamming. To solve this problem, the existing technology usually sets up a quarry in front of the slurry pump to filter and collect large rocks in the slurry.

[0003] For example, Chinese utility model patent CN208845177U discloses a novel quarry box for a slurry shield tunneling machine. This quarry box includes a box body connected to a slurry discharge section and a stone storage box (i.e., a stone holding box). A filter cylinder is installed inside the box body, comprising a grid screen and a slag discharge mechanism connected to the grid screen. The slag discharge mechanism is located above the stone storage box, and the grid screen is located above the slurry discharge section. A spiral slag conveying mechanism is installed inside the grid screen. In use, slurry containing large-diameter slag enters the grid screen from the slurry inlet for separation, while denser slag is guided towards the slag discharge mechanism by the spiral slag conveying mechanism. During the conveying process, smaller slag particles pass through the screen holes on the grid screen cylinder and enter the slurry discharge section. The small-diameter slag and slurry are then sent out of the quarry box through the slurry discharge section. Larger slag particles continue to be conveyed to the slag discharge mechanism and eventually fall into the stone container. When the stones in the stone container accumulate to a certain amount, the slag discharge door is opened, and the stones accumulated in the box are removed.

[0004] The aforementioned grid screen and spiral conveying mechanism together constitute the screening and conveying mechanism. The slurry inlet is located at one end of the screening and conveying mechanism. The direction in which the slurry enters is the same as the direction in which the screening and conveying mechanism guides the slag. Because the slurry has a certain pressure and a fast flow rate, the slurry carrying large and small stones can easily rush directly to the end of the screening and conveying mechanism, causing large and small stones to enter the stone collection box together. This leads to the stone collection box quickly filling up with stones, requiring frequent stone discharge, which causes inconvenience to the work and also weakens the original function of the quarry box in screening only large stones. Summary of the Invention

[0005] The purpose of this utility model is to provide a quarry box to solve the problems of existing quarry boxes quickly filling up with stones, requiring frequent stone discharge which leads to inconvenience, and the poor function of quarry boxes that are only used to screen large stones; the purpose of this utility model is also to provide a slag transportation system and a tunneling machine to solve the above problems.

[0006] To achieve the above objectives, the quarry box in this utility model adopts the following technical solution:

[0007] A quarry box includes a box body, inside which is a screening and conveying mechanism for intercepting and conveying large stones in slurry while allowing small stones to pass through. The screening and conveying mechanism has an inlet end and an outlet end. A stone storage box for receiving large stones is connected to the box body at a position corresponding to the outlet end. A feed box is connected to the top of the box body at a position corresponding to the inlet end. The feed box is in communication with the inlet end. The feed box has an interface facing the outlet end for connecting to a slurry inlet pipe. The feed box also has a buffer wall arranged opposite to the interface to allow the incoming slurry to impact and buffer the slurry.

[0008] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention. The improvement lies in the fact that a feeding box is connected at the position corresponding to the feeding end on the top of the box body. The feeding box is connected to the feeding end and has an interface facing the discharge end for connecting to the slurry inlet pipe. In this way, the slurry carrying large and small stones enters the feeding box through the slurry inlet pipe and then enters the feeding end of the screening and conveying mechanism. Moreover, the direction of slurry entry is opposite to the conveying direction of the screening and conveying mechanism. At the same time, the feeding box also has an interface facing the interface for... The incoming slurry impacts the buffer wall, causing a sharp change in the slurry's flow direction and reducing its speed before entering the feed end of the screening and conveying mechanism. This allows small stones to pass through effectively, while large stones are effectively intercepted and conveyed towards the discharge end. This prevents small stones from being discharged directly into the stone storage box at high speed, thus avoiding the stone storage box from quickly filling up with stones. It also reduces the inconvenience caused by frequent stone discharge and enhances the original function of the quarry box, which was originally only for screening large stones.

[0009] Furthermore, the buffer wall is arranged at an angle from bottom to top towards the interface.

[0010] Furthermore, the buffer wall is tilted at an angle of 60° to 70° relative to the horizontal plane.

[0011] Furthermore, the screening and conveying mechanism includes a screening shaft, screening spiral blades fixed on the screening shaft, and a screen arranged outside the screening spiral blades, with the screen fixedly installed inside the housing.

[0012] Furthermore, the screen is a semi-cylindrical screen with an open top, and the feed box is located directly above the screening spiral blades at the feed end.

[0013] Furthermore, the bottom of the stone storage box is equipped with an openable and closable slag discharge door, and the stone storage box is equipped with a conveying device for automatically transporting large stones towards the slag discharge door.

[0014] Furthermore, the conveying direction of the conveying device is perpendicular to the conveying direction of the screening conveying mechanism.

[0015] Furthermore, the conveying device includes a stone-discharging shaft and stone-discharging spiral blades fixed on the stone-discharging shaft.

[0016] To achieve the above objectives, the slag and stone transportation system of this utility model adopts the following technical solution:

[0017] A slag and rock transportation system includes a quarry box, which comprises a box body. Inside the box body is a screening and conveying mechanism for intercepting and conveying large rocks in the slurry while allowing small rocks to pass through. The screening and conveying mechanism has an inlet end and an outlet end. A storage box for receiving large rocks is connected to the box body at a position corresponding to the outlet end. A feed box is connected to the top of the box body at a position corresponding to the inlet end, and the feed box communicates with the inlet end. The feed box has an interface facing the outlet end for connecting to a slurry inlet pipe. The feed box also has a buffer wall facing the interface to allow the incoming slurry to impact and buffer the slurry. The slag and rock transportation system further includes a slag and rock transfer device mounted on a rear-mounted trailer. The system also includes a slag and rock basket for receiving large rocks discharged from the quarry box and a material vehicle capable of traveling inside and outside the tunnel. The slag and rock transfer device is used to transfer the slag and rock basket carrying large rocks to the material vehicle, and the material vehicle is used to transport the large rocks out of the tunnel.

[0018] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention. The improvement lies in that a feed box is connected to the top of the quarry box at a position corresponding to the feed end. The feed box is connected to the feed end and has an interface facing the discharge end for connecting to the slurry inlet pipe. In this way, the slurry carrying large and small stones enters the feed box through the slurry inlet pipe and then enters the feed end of the screening and conveying mechanism. The direction of slurry entry is opposite to the conveying direction of the screening and conveying mechanism. At the same time, the feed box also has an interface facing the interface. The buffer wall, designed to cushion the incoming slurry by impacting it, causes a dramatic change in the slurry's flow direction and reduces its speed before it enters the feed end of the screening and conveying mechanism. This allows small stones to pass through effectively, while large stones are intercepted and conveyed towards the discharge end. This prevents small stones from being discharged directly into the stone storage box at high speed, thus avoiding the stone storage box from quickly filling up with stones. It also reduces the inconvenience caused by frequent stone discharge and enhances the original function of the quarry box, which was originally only for screening large stones.

[0019] Furthermore, the buffer wall is arranged at an angle from bottom to top towards the interface.

[0020] Furthermore, the buffer wall is tilted at an angle of 60° to 70° relative to the horizontal plane.

[0021] Furthermore, the screening and conveying mechanism includes a screening shaft, screening spiral blades fixed on the screening shaft, and a screen arranged outside the screening spiral blades, with the screen fixedly installed inside the housing.

[0022] Furthermore, the screen is a semi-cylindrical screen with an open top, and the feed box is located directly above the screening spiral blades at the feed end.

[0023] Furthermore, the bottom of the stone storage box is equipped with an openable and closable slag discharge door, and the stone storage box is equipped with a conveying device for automatically transporting large stones towards the slag discharge door.

[0024] Furthermore, the conveying direction of the conveying device is perpendicular to the conveying direction of the screening conveying mechanism.

[0025] Furthermore, the conveying device includes a stone-discharging shaft and stone-discharging spiral blades fixed on the stone-discharging shaft.

[0026] To achieve the above objectives, the tunneling machine of this utility model adopts the following technical solution:

[0027] A tunneling machine includes a main unit, a rear-mounted trailer, and a slag transport system. The slag transport system includes a quarry box, which has a box body and a screening and conveying mechanism inside the box body for intercepting and conveying large stones in the slurry while allowing small stones to pass through. The screening and conveying mechanism has an inlet end and an outlet end. A stone storage box for receiving large stones is connected to the box body at a position corresponding to the outlet end. A feed box is connected to the top of the box body at a position corresponding to the inlet end and is connected to the inlet end. The feed box has an interface facing the outlet end for connecting to a slurry inlet pipe. The feed box also has a buffer wall arranged opposite the interface to allow the incoming slurry to impact and buffer the slurry. The slag transport system also includes a slag transfer device mounted on the rear-mounted trailer. The slag transport system also includes a slag basket for receiving large stones discharged from the quarry box and a material vehicle that can travel inside and outside the tunnel. The slag transfer device is used to transfer the slag basket carrying large stones to the material vehicle, and the material vehicle is used to transport the large stones out of the tunnel.

[0028] The beneficial effects of the above technical solution are as follows: This utility model is an improved invention. The improvement lies in that a feed box is connected to the top of the quarry box at a position corresponding to the feed end. The feed box is connected to the feed end and has an interface facing the discharge end for connecting to the slurry inlet pipe. In this way, the slurry carrying large and small stones enters the feed box through the slurry inlet pipe and then enters the feed end of the screening and conveying mechanism. The direction of slurry entry is opposite to the conveying direction of the screening and conveying mechanism. At the same time, the feed box also has an interface facing the interface. The buffer wall, designed to cushion the incoming slurry by impacting it, causes a dramatic change in the slurry's flow direction and reduces its speed before it enters the feed end of the screening and conveying mechanism. This allows small stones to pass through effectively, while large stones are intercepted and conveyed towards the discharge end. This prevents small stones from being discharged directly into the stone storage box at high speed, thus avoiding the stone storage box from quickly filling up with stones. It also reduces the inconvenience caused by frequent stone discharge and enhances the original function of the quarry box, which was originally only for screening large stones.

[0029] Furthermore, the buffer wall is arranged at an angle from bottom to top towards the interface.

[0030] Furthermore, the buffer wall is tilted at an angle of 60° to 70° relative to the horizontal plane.

[0031] Furthermore, the screening and conveying mechanism includes a screening shaft, screening spiral blades fixed on the screening shaft, and a screen arranged outside the screening spiral blades, with the screen fixedly installed inside the housing.

[0032] Furthermore, the screen is a semi-cylindrical screen with an open top, and the feed box is located directly above the screening spiral blades at the feed end.

[0033] Furthermore, the bottom of the stone storage box is equipped with an openable and closable slag discharge door, and the stone storage box is equipped with a conveying device for automatically transporting large stones towards the slag discharge door.

[0034] Furthermore, the conveying direction of the conveying device is perpendicular to the conveying direction of the screening conveying mechanism.

[0035] Furthermore, the conveying device includes a stone-discharging shaft and stone-discharging spiral blades fixed on the stone-discharging shaft. Attached Figure Description

[0036] Figure 1 is a structural schematic diagram of Embodiment 1 of the quarry box of this utility model (the slag basket is not shown);

[0037] Figure 2 is a cross-sectional view along line AA in Figure 1 (showing the slag basket);

[0038] Figure 3 is a schematic diagram of the crane beam, crane, slag basket, and material car in Embodiment 1 of the slag transportation system of this utility model;

[0039] Figure 4 is a schematic diagram of Embodiment 1 of the slag and stone transportation system of this utility model;

[0040] Figure 5 is a structural schematic diagram of Embodiment 2 of the quarry box of this utility model.

[0041] In the diagram: 1. Box body; 1-1. Feed box; 1-1-1. Interface; 1-1-2. Buffer wall; 2. Discharge section; 3. Screening shaft; 4. Screening spiral blades; 5. Screen; 6. Gate; 7. Stone storage box; 7-1. Arc-shaped bottom wall; 7-2. Inclined plate; 8. Conveying device; 8-1. Discharge shaft; 8-2. Discharge spiral blades; 9. Slag discharge gate; 10. Slag basket; 11. Crane beam; 12. First crane; 13. Second crane; 14. Slurry inlet pipe; 15. First sensor; 16. Second sensor; 17. Material cart; 18. Discharge pipe. Detailed Implementation

[0042] To address the technical problems existing in the prior art, the basic concept of this utility model is to change the way the slurry enters the stone storage tank, so that the direction of the slurry entering is opposite to the conveying direction of the screening and conveying mechanism. At the same time, a buffer wall is set to allow the incoming slurry to impact and buffer the slurry, thereby reducing the speed of the slurry. This allows small stones to pass through the screening and conveying mechanism effectively, while large stones are effectively intercepted and conveyed towards the discharge end, preventing the stone storage tank from quickly filling up with stones.

[0043] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0044] Example 1 of the slag and stone transportation system of this utility model:

[0045] The slag and stone transportation system includes a quarry box, as shown in Figures 1 and 2. The quarry box includes a box body 1, inside which is a screening and conveying mechanism for intercepting and conveying large stones in the slurry while allowing small stones to pass through. The screening and conveying mechanism has a feed end and a discharge end. Specifically, the screening and conveying mechanism includes a screening shaft 3 and screening spiral blades 4 fixed on the screening shaft 3. The shaft 3 is horizontally positioned. In this embodiment, the right end of the shaft 3 and the screening spiral blades 4 is the feed end of the screening and conveying mechanism, and the left end is the discharge end. In other embodiments, the left end of the shaft 3 and the screening spiral blades 4 can also be set as the feed end of the screening and conveying mechanism, and the right end as the discharge end.

[0046] The screening and conveying mechanism also includes a screen 5 disposed around the rotating shaft 3 and the screening spiral blades 4. The screen 5 is fixedly disposed inside the housing 1 and can intercept large stones in the mud while allowing small stones to pass through. When the rotating shaft 3 drives the screening spiral blades 4 to rotate, the large stones on the screen 5 can be conveyed from the head to the tail (the head corresponds to the feed end, and the tail corresponds to the discharge end). The housing 1 is connected to a discharge section 2 located below the screen 5. The mud and small stones passing through the screen 5 enter the discharge section 2. The discharge section 2 has a funnel-shaped inner wall, and the bottom of the discharge section 2 is used to connect to the discharge pipe 18 to discharge the mixture of mud and small stones out of the hole.

[0047] In this embodiment, the screen 5 is semi-cylindrical with an open top. A feed box 1-1 is provided at the top of the housing 1, corresponding to the feed end of the screening and conveying mechanism. The feed box 1-1 is located directly above the screening spiral blades 4 at the feed end and is connected to the feed end. The feed box 1-1 has an interface 1-1-1 facing the discharge end of the screening and conveying mechanism and used to connect to the slurry inlet pipe 14. That is, the lower part of the feed box 1-1 is connected to the internal space of the housing 1. The interface 1-1-1 is only provided on the side wall facing the discharge end of the screening and conveying mechanism. Other than that, the top wall and other side walls are closed.

[0048] The feed box 1-1 also has a buffer wall 1-1-2 arranged opposite to the interface 1-1-1 to cushion the incoming slurry by impact. This ensures the slurry enters in the opposite direction to the conveying direction of the screening and conveying mechanism. The slurry entering the feed box 1-1 first impacts the buffer wall 1-1-2, causing a sharp change in the slurry flow direction and reducing its speed before entering the feed end of the screening and conveying mechanism. Most of the small stones in the slurry can then pass through the front half of the screen 5, while larger stones are effectively intercepted and conveyed towards the discharge end. The screen 5 has a certain length to ensure that all small stones can pass through it.

[0049] Furthermore, the buffer wall 1-1-2 is arranged inclined from bottom to top towards the interface 1-1-1, which, through reflection, facilitates the guidance of the slurry to the feed end of the screening and conveying mechanism. Preferably, the inclination angle of the buffer wall 1-1-2 relative to the horizontal plane can be 60°, 65°, or 70°.

[0050] As shown in Figure 1, the screen 5 is only arranged at the head and middle of the rotating shaft 3 and the screening spiral blade 4, with no screen at the tail. A stone storage box 7 is connected to the housing 1 at a position corresponding to the tail of the rotating shaft 3 and the screening spiral blade 4 to receive large stones conveyed by the screening spiral blade 4. If the conveying direction of the screening conveying mechanism is defined as from front to back, then the stone storage box 7 is located below the tail of the screening conveying mechanism and behind the discharge section 2. An openable and closable slag discharge door 9 is installed on the stone storage box 7. The stone storage box 7 has a certain depth in the vertical direction, and the slag discharge door 9 is located at the bottom of the stone storage box 7.

[0051] The upper part of the stone storage box 7 is equipped with a gate 6 that controls the opening and closing of the stone falling channel inside the stone storage box 7. Both the gate 6 and the aforementioned slag discharge gate 9 are hydraulically driven and controlled, enabling automatic discharge of slag. The bottom of the stone storage box 7 is equipped with a conveying device 8 for automatically conveying large stones towards the slag discharge gate 9, thus achieving automatic discharge of slag. In this embodiment, the conveying device 8 is a screw conveyor, including a stone discharge shaft 8-1 and stone discharge spiral blades 8-2 fixed on the stone discharge shaft 8-1. The stone discharge shaft 8-1 is also horizontally positioned, but its axial direction is perpendicular to the axial direction of the screening shaft 3. That is, the conveying direction of the conveying device is perpendicular to the conveying direction of the screening conveying mechanism. This avoids the entire stone storage box occupying a large space in the front-to-back direction, facilitating the arrangement of the stone storage box.

[0052] Specifically, the conveying direction of the conveying device 8 is from left to right. The slag discharge gate 9 is located at the right end of the bottom of the stone storage box 7. The left end of the conveying device 8 is aligned vertically with the tail of the screening conveying mechanism. The left side wall of the stone storage box 7 is a vertical wall, and the right side wall gradually slopes to the right from top to bottom. The projection of the stone storage box 7 in the plane perpendicular to the rotation axis of the screening shaft 3 is a right trapezoid, which gives the lower part of the stone storage box 7 a large stone storage space in the left and right directions. The bottom cross-section of the stone storage box 7 gradually narrows from top to bottom to cooperate with the conveying device 8 so that the slag can be discharged smoothly.

[0053] Meanwhile, the distance between the inner walls of the front and rear side walls of the stone storage box 7 gradually decreases from top to bottom, and the bottom of the stone storage box 7 is provided with an arc-shaped bottom wall 7-1, which is just right to match the stone discharge shaft 8-1 and the stone discharge spiral blade 8-2, so as to facilitate the discharge of all the large stones in the stone storage box 7.

[0054] During operation, when the stone storage box 7 is normally storing large stones, the gate 6 is open, allowing the large stones conveyed by the screening and conveying mechanism to fall into the stone storage box 7. Simultaneously, because the quarry box is filled with slurry during operation, the slag discharge door 9 is closed to maintain pressure and prevent slurry leakage from the slag discharge door 9, ensuring the normal operation of the slurry circulation system. When the stone storage box 7 is full and needs to be discharged, the gate 6 is closed to maintain pressure, and the slag discharge door 9 is opened to facilitate the discharge of large stones. The space above the gate 6 to the tail of the screening and conveying mechanism forms a temporary stone storage space L, allowing for the discharge of large stones without stopping the machine. Because a conveying device 8 is installed at the bottom of the stone storage box 7, large stones can be automatically conveyed towards the slag discharge door 9. After the large stones are discharged, the gate 6 is opened and the slag discharge door 9 is closed to receive more large stones. Since the conveying device 8 has high stone discharge efficiency, the temporary stone storage space L does not need to be too large to meet the needs of temporary large stone storage.

[0055] As shown in Figure 1, a first sensor 15 is installed in the slurry discharge section 2 to detect the amount of small stones in the slurry discharge section 2, and a second sensor 16 is installed in the stone storage tank 7 to detect the amount of large stones below the gate 6. The specific forms of the first sensor 15 and the second sensor 16 can be selected in various ways. For example, they can both be set as weight sensors (which need to be set at the bottom). When there are more stones stored, the sensor readings increase. Of course, the first sensor 15 can also be set as a sensor that can detect pressure or flow rate. When there are many small stones in the slurry discharge section 2 and blockage occurs, the fluid flow rate will decrease and the pressure will increase. Of course, the two sensors can also be set as ultrasonic scanning sensors, such as industrial B-ultrasound machines, or as electromagnetic wave tomography sensors, such as radar.

[0056] The quarry also includes a control system for automatically controlling the conveying speed of the screening and conveying mechanism and the conveying device based on detection data from the first sensor 15 and the second sensor 16. As one control mode, the rotational speed of the screening shaft 3 is defined as V1, the amount of small stones in stock is Q1, and the maximum stone storage capacity of the discharge section 1 is Q. 1max The rotational speed of the stone-discharging shaft 8-1 is V2, the large stone storage capacity is Q2, and the maximum stone storage capacity of the stone storage box 7 is Q. 2max ,but Where k1 is the screening efficiency coefficient and 0 < k1 < 1, and k2 is the stone removal efficiency coefficient and 0 < k2 < 1, the specific values ​​of k1 and k2 are determined according to the actual situation. V 1max V is the maximum rotational speed of the screening shaft 3. 2max This is the maximum rotational speed of the stone discharge shaft 8-1. The maximum stone storage capacity of the slurry discharge section 1 is Q. 1max The maximum stone storage capacity of the stone storage box 7 can be calculated based on the volume of the discharge section 1. 2max It can be calculated based on the volume of the stone storage box 7.

[0057] As can be seen from the formula for V1 above, when the amount of small stones Q1 increases, V1 will decrease. This corresponds to a relatively large number of small stones in the discharge section 1, indicating that the slurry carries a large number of stones (generally, there are also many large stones). In this case, the rotation speed V1 of the screening shaft 3 should be slowed down to reduce the amount of small stones passing through the screen 5, allowing sufficient time for the small stones in the discharge section 1 to be discharged, thus preventing excessive accumulation of small stones and blockage. Simultaneously, slowing down the rotation speed V1 of the screening shaft 3 can also reduce the conveying speed of large stones, allowing sufficient time for the slag in the stone storage box 7 to be discharged.

[0058] As can be seen from the formula for V2 above, when the amount of large stones Q2 increases, V2 will also increase. The corresponding actual working condition is that there are a lot of large stones in the stone storage box 7, which need to be discharged at a faster speed to avoid the temporary stone storage space from being filled with stones and causing blockage. Therefore, the rotation speed V2 of the stone discharge shaft 8-1 should be increased to speed up the discharge of slag.

[0059] By using the detection data from the first sensor 15 and the second sensor 16, the rotation speeds of the screening shaft 3 and the stone discharge shaft 8-1 can be adjusted to adapt to the characteristics of slag and stone in different strata and avoid slag and stone blockage.

[0060] Furthermore, as shown in Figure 3, the slag transport system also includes a slag transfer device mounted on a rear-mounted trailer. In this embodiment, a crane beam 11 is installed on the rear-mounted trailer, and the slag transfer device is at least one crane mounted on the crane beam 11. Referring to Figures 2 and 3, the slag transport system also includes a slag basket 10 for receiving large stones discharged from the quarry and a material cart 17 capable of traveling inside and outside the tunnel. The crane is used to lift the slag basket 10 carrying large stones to the material cart 17, and the material cart 17 is used to transport the large stones out of the tunnel.

[0061] Normally, when the amount of large stones collected is small, a high stone-discharging speed is not required, and one crane is sufficient to lift the slag basket 10 from point A to point C at the material cart. When the amount of large stones is large and a higher stone-discharging speed is required, two cranes are used, namely the first crane 12 and the second crane 13. The first crane 12 lifts the slag basket 10 from point A to point B, and then returns to point A to lift other slag baskets; the second crane 13 lifts the slag basket 10 from point B to point C, and then returns to point B to lift other slag baskets.

[0062] The number of cranes is directly related to the quantity of large and small stones. The quantity of large stones, Q2, directly indicates the amount of large stones, while the quantity of small stones, Q1, can also reflect the quantity of large stones to some extent. Therefore, let the number of cranes be defined as n. Where k3 is the transportation adjustment coefficient and 0 < k3 < 1, the specific value of k3 is determined according to the actual situation, and n is a decimal and is rounded to the nearest integer. This makes it very convenient to determine the number of cranes to be configured.

[0063] When the slag and stone transportation system of this utility model is in use, as shown in Figures 1, 2, 3 and 4, the slurry enters the feed box 1-1 of the quarry box through the slurry inlet pipe 14. It first impacts the buffer wall 1-1-2, causing a sharp change in the flow direction and a decrease in speed before entering the head of the screening and conveying mechanism. The screening shaft 3 and the screening spiral blades 4 rotate continuously. Small-diameter slag and stone fall through the screen 5 into the discharge section 2 under the action of gravity, and then are discharged to the mud-water separation station on the ground through the discharge pipe 18. This avoids small stones being discharged directly from the discharge end into the stone storage box 7 at a high speed, thus preventing the stone storage box 7 from quickly filling up with stones, reducing the inconvenience caused by frequent stone discharge, and improving the original function of the quarry box which only screens large stones.

[0064] Meanwhile, large-diameter slag is intercepted by screen 5 and moved backward by the conveying action of the screening spiral blades 4. After reaching the tail of the screening and conveying mechanism, it falls into the slag storage box 7 under gravity. At this time, the gate 6 is open and the slag discharge door 9 is closed. When the slag in the slag storage box 7 reaches a certain amount, the control system controls the gate 6 to close automatically and simultaneously controls the slag discharge door 9 to open. The slag in the slag storage box 7 is then conveyed and discharged towards the slag discharge door 9 by the conveying device. The slag discharged from the slag storage box 7 falls into the slag basket 10. When the slag basket 10 is full, a crane is used to lift the slag basket 10 to the material cart 17, and then the material cart 17 transports the slag out of the tunnel.

[0065] Example 2 of the slag and stone transportation system of this utility model:

[0066] As shown in Figure 5, this embodiment differs from Embodiment 1 in that the conveying device 8 is not a screw conveyor, but a belt conveyor. To ensure the pressure-holding function of the quarry box 7 when it normally receives large stones, the belt conveyor must be completely installed inside the quarry box 7. In this case, the bottom wall and front and rear side walls of the quarry box 7 are flat walls. In order to prevent stones from leaking to the sides of the belt conveyor and causing jamming, inclined plates 7-2 are fixed on the front and rear side walls of the quarry box 7 respectively. The two inclined plates 7-2 are symmetrically arranged and located above the belt surface of the belt conveyor to ensure that all large stones can be discharged. Of course, the length of the belt conveyor only reaches the position of the slag discharge door, without covering the slag discharge door, so that when the slag discharge door is opened, the stones conveyed by the belt conveyor can fall naturally and be discharged to the outside of the quarry box.

[0067] In other embodiments of the slag and stone transportation system: the slag and stone transfer device can also be a trolley, for example, a rear-mounted trailer equipped with a track, and the trolley is an electric trolley that travels on the track. Of course, it is also possible that no track is set, and the trolley is a hand-pushed trolley that travels manually.

[0068] In other embodiments of the slag and stone transportation system: the first sensor is no longer installed in the slurry discharge section, and the second sensor is no longer installed in the stone storage box. At this time, observation windows can be set on the stone storage box and the slurry discharge section, and the timing of stone discharge can be controlled by manual observation or by setting up an external camera for observation. Of course, stone discharge can also be scheduled according to construction experience.

[0069] In other embodiments of the slag and stone transportation system: depending on the specific length of the rear trailer and the actual amount of large stones, the number of slag and stone transfer devices can also be set to three or more.

[0070] In other embodiments of the slag and stone transportation system: when the conveying direction of the screening and conveying mechanism is from front to back, the conveying direction of the conveying device can be from right to left. At this time, the slag discharge gate is arranged at the left end of the bottom of the stone storage box, the right end of the conveying device is aligned vertically with the tail of the screening and conveying mechanism, and the left side wall of the stone storage box gradually tilts to the left from top to bottom.

[0071] In other embodiments of the slag and stone transportation system: the conveying direction of the screening and conveying mechanism can be from left to right, and the conveying direction of the conveying device is from front to back. At this time, the slag discharge gate is arranged at the rear end of the bottom of the stone storage box, the front end of the conveying device is aligned vertically with the tail end of the screening and conveying mechanism, and the rear side wall of the stone storage box gradually slopes to the left from top to bottom.

[0072] In other embodiments of the slag and stone transportation system: when the conveying direction of the conveying device is perpendicular to the conveying direction of the screening and conveying mechanism, the front, rear, left, and right side walls of the stone storage box can all be vertical side walls. Of course, the end of the conveying device away from the slag discharge gate is still aligned vertically with the tail of the screening and conveying mechanism.

[0073] In other embodiments of the slag and stone transportation system: the conveying direction of the conveying device can be parallel to the conveying direction of the screening conveying mechanism. In this case, the quarry occupies a large space in the conveying direction of the screening conveying mechanism.

[0074] In other embodiments of the slag and stone transportation system: the conveying device may not be installed inside the stone storage box. In this case, when the slag discharge door is opened, the stones in the stone storage box are manually removed using tools.

[0075] In other embodiments of the slag and stone transportation system: the screen can be a complete cylindrical screen. In this case, the feed box and the screening spiral blades are not arranged vertically aligned, but staggered vertically. One end of the cylindrical screen is the feed end, so that the slurry can enter the screen.

[0076] In other embodiments of the slag and stone transportation system: the screening and conveying mechanism may include a screen cylinder and a spiral rib plate fixed on the inner wall of the screen cylinder. The screen cylinder is cylindrical and has multiple screen holes, which can intercept large stones and allow small stones to pass through. Of course, the screening and conveying mechanism also includes a power device to control the rotation of the screen cylinder. When the screen cylinder rotates, the spiral rib plate on the inner wall of the screen cylinder can transport large stones from one end of the axial direction to the other end.

[0077] In other embodiments of the slag and stone transportation system: the screening and conveying mechanism can also be a vibrating screening and conveying mechanism. In this case, the screening and conveying mechanism includes a screen and a vibrating device that controls the reciprocating vibration of the screen. As the screen vibrates reciprocally, large stones are conveyed from the head of the screen to the tail and then fall into the stone storage box.

[0078] In other embodiments of the slag and stone transportation system, the buffer wall can be arranged vertically instead of inclined, which can also play the role of buffering and deceleration.

[0079] In other embodiments of the slag and stone transportation system, the gate inside the slag and stone storage box can also be installed in the middle of the slag and stone storage box, which results in a larger temporary storage space and a correspondingly larger volume of the slag and stone storage box.

[0080] In other embodiments of the slag and stone transportation system: the gate and the slag discharge gate can also be electric gates or manual gates.

[0081] The embodiment of the quarry box in this utility model is as follows: the specific structure of the quarry box is the same as that of the quarry box in any embodiment of the above-mentioned slag and stone transportation system, and will not be repeated here.

[0082] The embodiment of the tunneling machine in this utility model is as follows: the tunneling machine includes a main unit, a rear-mounted trailer and a slag transportation system. The specific structure of the slag transportation system is the same as that of any of the above embodiments, and will not be repeated here.

[0083] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A quarry box, comprising a box body, wherein the box body is provided with a screening and conveying mechanism for intercepting and conveying large stones in slurry while allowing small stones to pass through, the screening and conveying mechanism having an inlet end and an outlet end, and a stone storage box for receiving large stones is connected to the box body at a position corresponding to the outlet end, characterized in that... A feed box is connected to the top of the box at a position corresponding to the feed end. The feed box is connected to the feed end and has an interface facing the discharge end for connecting to the slurry inlet pipe. The feed box also has a buffer wall arranged opposite the interface to allow the incoming slurry to impact and buffer the slurry.

2. The stone box according to claim 1, wherein The buffer wall is arranged at an angle from bottom to top towards the interface.

3. The stone box of claim 2, wherein, The buffer wall is inclined at an angle of 60° to 70° relative to the horizontal plane.

4. The stone box according to any one of claims 1 to 3, characterized in that The screening and conveying mechanism includes a screening shaft, screening spiral blades fixed on the screening shaft, and a screen arranged outside the screening spiral blades, with the screen fixedly installed inside the box.

5. The stone box of claim 4, wherein, The screen is a semi-cylindrical screen with an open top, and the feed box is located directly above the screening spiral blades at the feed end.

6. The quarry box according to any one of claims 1 to 3, characterized in that, The bottom of the stone storage box is equipped with an openable and closable slag discharge door, and the inside of the stone storage box is equipped with a conveying device for automatically transporting large stones toward the slag discharge door.

7. The stone box of claim 6, wherein, The conveying direction of the conveying device is perpendicular to the conveying direction of the screening conveying mechanism.

8. The quarry box of claim 6, wherein, The conveying device includes a stone-discharging shaft and stone-discharging spiral blades fixed on the stone-discharging shaft.

9. A slag and stone transportation system, comprising a quarry box, characterized in that, The quarry box is the quarry box as described in any one of claims 1 to 8. The slag transport system further includes a slag transfer device for being arranged on the rear-mounted trailer. The slag transport system also includes a slag basket for receiving large stones discharged from the quarry box and a material vehicle that can travel inside and outside the tunnel. The slag transfer device is used to transfer the slag basket carrying large stones to the material vehicle, and the material vehicle is used to transport the large stones out of the tunnel.

10. A heading machine comprising a main machine, a rear mating trailer and a spoil transport system, characterized in that, The slag and stone transportation system is the slag and stone transportation system as described in claim 9.

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