Crushing and deslagging system and small shield tunneling machine comprising same

Abstract

The utility model provides a crushing and deslagging system and a small shield tunneling machine comprising the same, and belongs to the technical field of tunnel construction equipment. Comprising a spiral conveyor, an inner cone crusher, a slurry discharge pump assembly and a slurry discharge pipeline, one end of the screw conveyor is connected with a front shield of the small shield, and the other end of the screw conveyor is connected with a feeding end of the inner cone crusher; the inner cone crusher is fixedly mounted on a rear matched trolley of the small shield through a bottom plate, and the discharge end of the inner cone crusher is connected with one end of the slurry discharge pump assembly; one end, far away from the inner cone crusher, of the slurry discharge pump assembly is connected with one end of the slurry discharge pipeline; and the other end of the slurry discharging pipeline extends out of the tunnel. According to the small slurry balance shield tunneling machine, the screw conveyor and the multi-stage cone crusher are adopted for secondary crushing of large pebbles, the adaptability of the small slurry balance shield tunneling machine in a water-rich sand-gravel stratum is improved, the problem of stagnant discharge is solved, and the tunneling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tunnel construction equipment technical field relates to a broken slag system and contain its small shield machine. BACKGROUND

[0002] At present, small diameter slurry shield machine is limited by the passing particle size of the slurry pump when it is used in pebble stratum, the excavated pebble can be larger than the passing particle size of the slurry pump, and must be treated so that the slag stone can be pumped out through the circulating system.

[0003] The existing small slurry shield machine usually adopts hydraulic clamp type stone crusher for crushing, and the clamp type stone crusher driven by the hydraulic cylinder has low crushing efficiency, high failure rate and difficult maintenance. There is also a stone box that blocks large stones in the stone box, and takes out large stones through the stone box, but a large number of small stones are retained in the stone box during actual stone mining, which affects the tunneling efficiency and requires frequent mining of the stone box in the sand and pebble stratum. In the large slurry shield, single and double roller crushing is used for secondary crushing, but the size of the crusher is large, and the installation space of the small slurry shield machine is small, which cannot meet the requirements.

[0004] Therefore, a broken slag system is needed, which can discharge the sand and pebble in the slurry tank through the secondary crushing device for secondary crushing of large pebbles and direct discharge, thereby improving the slag discharge efficiency. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of broken slag system, including screw conveyor, inner cone type crusher, slurry pump assembly and slurry pipeline;

[0006] One end of the screw conveyor is connected to the front shield of the small shield, and the other end of the screw conveyor is connected to the feed end of the inner cone type crusher;

[0007] The inner cone type crusher is fixedly installed on the rear matching trolley of the small shield through the bottom plate, and the discharge end of the inner cone type crusher is connected to one end of the slurry pump assembly;

[0008] The end of the slurry pump assembly away from the inner cone type crusher is connected to one end of the slurry pipeline;

[0009] The other end of the slurry pipeline extends to the outside of the tunnel.

[0010] Further, the screw conveyor is connected to the inner cone type crusher through the wear-resistant hose;

[0011] The two ends of the wear-resistant hose are uniformly pressed on the screw conveyor and the inner cone type crusher by bolts respectively.

[0012] Further, the breakable particle size of the inner cone type crusher is larger than the maximum opening size of the cutter head of the small shield.

[0013] The screw conveyor can handle particles with a diameter larger than the maximum opening size of the cutterhead of a small tunnel boring machine.

[0014] Furthermore, a first sealing structure is provided between the screw conveyor and the front shield.

[0015] Furthermore, the inner cone crusher is also equipped with an observation port and a cover plate on the observation port;

[0016] The cover plate is detachably connected to the inner cone crusher.

[0017] Furthermore, a shock absorber, an electric ball valve, and a bend are provided between the inner cone crusher and the slurry pump assembly;

[0018] One end of the shock absorber is fixed to the inner cone crusher by bolts, and the other end of the shock absorber is connected to an electric ball valve.

[0019] One end of the bend is connected to the end of the electric ball valve away from the damping throat, and the other end of the bend is connected to the mud pump in the slurry pump assembly.

[0020] Furthermore, the electric ball valve is evenly tightened onto the shock absorber throat by bolts;

[0021] A second sealing structure is provided between the bend and the electric ball valve;

[0022] A third sealing structure is provided between the bend and the mud pump;

[0023] A fourth sealing structure is provided between the slurry discharge pipeline and the slurry pump discharge port.

[0024] Furthermore, the rear trolley is also equipped with a support bracket for supporting the slurry discharge pipeline, and the support bracket has at least two pieces spaced apart from each other along the extension direction of the slurry discharge pipeline.

[0025] Furthermore, the crushing and slag removal system also includes a hydraulic pump station;

[0026] The hydraulic pump station is connected to the slurry pump assembly, the screw conveyor, and the inner cone crusher via hydraulic pipelines, and is used to provide power to the slurry pump assembly, the screw conveyor, and the inner cone crusher.

[0027] This utility model also provides a small tunnel boring machine, including a rear-mounted trolley, a main drive, a front shield, a cutterhead, and a crushing and slag removal system as described above.

[0028] The crushing and slag removal system is installed on the rear supporting trolley, and one end of the screw conveyor in the crushing and slag removal system is connected to the front shield.

[0029] The fixed end of the main drive is installed inside the front shield, and a cutter head is installed on the drive end of the main drive.

[0030] The crushing and slag removal system is used to remove the slag and rock generated by the cutterhead during the tunneling process.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a crushing and slag removal system that uses a screw conveyor and a multi-stage cone crusher to perform secondary crushing of large pebbles, which improves the adaptability of small slurry balance shield tunneling machines in water-rich sandy and gravelly strata, solves the problem of stagnation and discharge, and improves tunneling efficiency.

[0033] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0034] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0035] Figure 1 This is a schematic diagram of the structure of a crushing and slag removal system according to an embodiment of this utility model;

[0036] Figure 2 yes Figure 1 Schematic diagram of the connection between the central helical conveyor and the front shield;

[0037] Figure 3 yes Figure 1 A schematic diagram of the flow of excavated soil during multi-stage cone crushing in a cone crusher.

[0038] in:

[0039] 01. Rear trolley; 02. Main drive; 03. Front shield; 04. Cutter head; 1. Screw conveyor; 2. Wear-resistant hose; 3. Internal cone crusher; 3.1. Observation port; 4. Vibration damping throat; 5. Electric ball valve; 6. Bend; 7. Slurry pump assembly; 8. Slurry pipeline; 9. Hydraulic pump station. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this utility model clearer and easier to understand, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings of this utility model are all in a simplified form and use non-precise proportions, and are only used to facilitate and clearly assist in illustrating the implementation of this utility model; the "several" mentioned in this utility model are not limited to the specific number shown in the examples in the drawings; the directions or positional relationships indicated by "front," "middle," "rear," "left," "right," "up," "down," "top," "bottom," and "middle" mentioned in this utility model are all based on the directions or positional relationships shown in the accompanying drawings of this utility model, and do not indicate or imply that the device or component referred to must have a specific orientation, nor should they be construed as limitations on this utility model.

[0041] Example:

[0042] See Figure 1 As shown, the crushing and slag removal system provided by this utility model includes a screw conveyor 1, a wear-resistant hose 2, an internal cone crusher 3, a shock absorber 4, an electric ball valve 5, a bend 6, a slurry pump assembly 7, a slurry discharge pipeline 8, and a hydraulic pump station 9.

[0043] The screw conveyor 1 is bolted to the front shield 03 of the small shield machine;

[0044] One end of the wear-resistant hose 2 is evenly pressed onto the screw conveyor 1 by bolts to ensure a reliable connection and seal between the wear-resistant hose 2 and the screw conveyor 1;

[0045] The other end of the wear-resistant hose 2 is evenly pressed onto the inner cone crusher 3 with bolts to ensure a reliable connection and seal between the wear-resistant hose 2 and the inner cone crusher 3. The inner cone crusher 3 is connected to the wear-resistant hose 2 with bolts so that it can be easily disassembled for maintenance after the inner cone crusher 3 has been used for a period of time. By setting the wear-resistant hose 2, vibration can be reduced while realizing the interconnection between the screw conveyor 1 and the inner cone crusher 3.

[0046] The inner cone crusher 3 is fixedly installed on the rear matching trolley 01 of the small shield tunnel via a base plate, and is used for secondary crushing of large rocks and / or mud clumps.

[0047] The shock absorber 4 is used to reduce the vibration generated by large stones and / or mud clumps during the conveying process. One end of the shock absorber 4 is fixed to the inner cone crusher 3 by bolts, and the other end of the shock absorber 4 is connected to an electric ball valve 5.

[0048] One end of the bend 6 is connected to the end of the electric ball valve 5 away from the damping throat 4, and the other end of the bend 6 is connected to the mud pump in the slurry pump assembly 7.

[0049] The base of the slurry pump assembly 7 is fixedly installed on the rear matching trolley 01 by welding.

[0050] One end of the slurry discharge pipeline 8 is connected to the slurry discharge port of the mud pump, and the other end of the slurry discharge pipeline 8 extends to the outside of the tunnel;

[0051] The hydraulic pump station 9 is connected to the slurry pump assembly 7, the screw conveyor 1, and the inner cone crusher 3 via hydraulic pipelines to provide power to the slurry pump assembly 7, the screw conveyor 1, and the inner cone crusher 3.

[0052] Preferably, a first sealing structure is provided between the screw conveyor 1 and the front shield 03 to ensure a sealed connection between the screw conveyor 1 and the front shield 03.

[0053] More preferably, the first sealing structure is configured as an O-ring and an O-groove structure that matches the O-ring.

[0054] Preferably, the inner cone crusher 3 is fixedly installed on the base plate, and the base plate is fixedly connected to the rear supporting trolley 01 by welding.

[0055] Furthermore, the inner cone crusher 3 is further provided with an observation port 3.1 and a cover plate on the observation port 3.1, so that after the inner cone crusher 3 has been used for a period of time, the operator can easily remove the cover plate to inspect and / or clean the inside of the inner cone crusher 3 through the observation port 3.1.

[0056] Preferably, the electric ball valve 5 is evenly tightened onto the shock absorber 4 with bolts to ensure a reliable connection and seal between the electric ball valve 5 and the shock absorber 4.

[0057] Preferably, a second sealing structure is provided between the bend 6 and the electric ball valve 5 to ensure a sealed connection between the bend 6 and the electric ball valve 5.

[0058] More preferably, the second sealing structure is configured as a first sealing gasket and a sealing groove structure that matches the first sealing gasket.

[0059] Preferably, a third sealing structure is provided between the bend 6 and the mud pump to ensure a sealed connection between the bend 6 and the mud pump.

[0060] More preferably, the third sealing structure is configured as a second sealing gasket and a sealing groove structure that matches the second sealing gasket.

[0061] Preferably, a fourth sealing structure is provided between the slurry discharge pipeline 8 and the slurry pump discharge port to ensure a sealed connection between the slurry discharge pipeline 8 and the slurry pump.

[0062] More preferably, the fourth sealing structure is configured as a third sealing gasket and a sealing groove structure that matches the third sealing gasket.

[0063] Preferably, in order to support the slurry discharge pipe 8, a bracket for supporting the slurry discharge pipe 8 is also provided on the rear supporting trolley 01. The bracket has at least two pieces that are spaced apart from each other along the extension direction of the slurry discharge pipe 8.

[0064] Furthermore, the specific structure of the inner cone crusher 3 is based on existing technology.

[0065] As a further embodiment of this utility model, the specific process of crushing and slag removal using the above-described crushing and slag removal system is as follows:

[0066] The main drive 02 drives the cutter head 04 to rotate, cutting off the mud and slag. The slag flows to the screw conveyor 1 under the action of the mud.

[0067] Screw conveyor 1 transports mud and slag using a screw conveyor.

[0068] The mud carrying the slag and stone enters the inner cone crusher 3 through the wear-resistant hose 2 under the suction of the slurry pump assembly 7 for secondary crushing;

[0069] After secondary crushing, the slag is drawn into the slurry pump in the slurry pump assembly 7 by the suction of the slurry pump assembly 7, through the shock absorber throat 4, electric ball valve 5 and bend 6. Under the action of the slurry pump, the mud and slag are discharged into the slurry discharge pipeline 8. The mud carrying the slag is discharged out of the tunnel through the slurry discharge pipeline 8.

[0070] Furthermore, in the aforementioned crushing and slag removal system, the crushed particle size of the inner cone crusher is determined based on the minimum passing particle size of the slurry pump installed in the tunnel. The crushable particle size of the inner cone crusher 3 must be greater than the maximum opening size of the cutter head 04 to prevent clogging of the inner cone crusher.

[0071] Furthermore, the particle size passing through the screw conveyor 1 must be larger than the maximum opening size of the cutter head 04 to prevent the screw conveyor from clogging during the transport of slag and soil.

[0072] As a further embodiment of the present invention, the present invention also provides a small tunnel boring machine, including a rear supporting trolley 01, a main drive 02, a front shield 03, a cutterhead 04, and a crushing and slag removal system as described above.

[0073] The crushing and slag removal system is installed on the rear supporting trolley 01, and one end of the screw conveyor 1 in the crushing and slag removal system is connected to the front shield 03.

[0074] The fixed end of the main drive 02 is installed inside the front shield 03, and the drive end of the main drive 02 is equipped with a cutter head 04.

[0075] The crushing and slag removal system is used to remove the slag and rock generated by the cutterhead 04 during the tunneling process.

[0076] Furthermore, apart from the above-described structure, the other structures and connections of the small tunnel boring machine refer to existing technologies.

[0077] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crushing and slag removal system, characterized in that, It includes a screw conveyor (1), an internal cone crusher (3), a slurry pump assembly (7), and a slurry pipeline (8); One end of the screw conveyor (1) is connected to the front shield (03) of the small shield tunnel, and the other end of the screw conveyor (1) is connected to the feed end of the inner cone crusher (3); The inner cone crusher (3) is fixedly installed on the rear supporting trolley (01) of the small shield tunnel through the base plate, and the discharge end of the inner cone crusher (3) is connected to one end of the slurry pump assembly (7); a shock absorber (4), an electric ball valve (5) and a bend (6) are provided between the inner cone crusher (3) and the slurry pump assembly (7); one end of the shock absorber (4) is fixed to the inner cone crusher (3) by bolts, and the other end of the shock absorber (4) is connected to the electric ball valve (5); one end of the bend (6) is connected to the end of the electric ball valve (5) away from the shock absorber (4), and the other end of the bend (6) is connected to the mud pump in the slurry pump assembly (7); The end of the slurry pump assembly (7) away from the inner cone crusher (3) is connected to one end of the slurry discharge pipeline (8); The other end of the slurry discharge pipeline (8) extends outside the tunnel.

2. The crushing and slag removal system according to claim 1, characterized in that, The screw conveyor (1) is connected to the inner cone crusher (3) via a wear-resistant hose (2); The two ends of the wear-resistant hose (2) are evenly pressed onto the screw conveyor (1) and the inner cone crusher (3) by bolts.

3. The crushing and slag removal system according to claim 2, characterized in that, The crushable particle size of the inner cone crusher (3) is greater than the maximum opening size of the cutterhead (04) of the small shield tunnel; The screw conveyor (1) can pass through the maximum opening size of the cutterhead (04) of the small shield tunnel with a particle size larger than that of the small shield tunnel.

4. The crushing and slag removal system according to claim 1, characterized in that, A first sealing structure is provided between the screw conveyor (1) and the front shield (03).

5. The crushing and slag removal system according to claim 1, characterized in that, An observation port (3.1) and a cover plate are also provided on the inner cone crusher (3); The cover plate is detachably connected to the inner cone crusher (3).

6. The crushing and slag removal system according to any one of claims 1-5, characterized in that, The electric ball valve (5) is evenly pressed onto the shock absorber throat (4) by bolts; A second sealing structure is provided between the bend (6) and the electric ball valve (5); A third sealing structure is provided between the bend (6) and the mud pump; A fourth sealing structure is provided between the slurry discharge pipeline (8) and the slurry discharge port of the mud pump.

7. The crushing and slag removal system according to claim 6, characterized in that, The rear trolley (01) is also provided with a bracket for supporting the slurry discharge pipeline (8), and the bracket is provided with at least two pieces spaced apart from each other along the extension direction of the slurry discharge pipeline (8).

8. The crushing and slag removal system according to claim 7, characterized in that, It also includes a hydraulic pump station (9); The hydraulic pump station (9) is connected to the slurry pump assembly (7), the screw conveyor (1) and the inner cone crusher (3) respectively through hydraulic pipelines, and is used to provide power source for the slurry pump assembly (7), the screw conveyor (1) and the inner cone crusher (3).

9. A small tunnel boring machine, characterized in that, It includes a rear-mounted trolley (01), a main drive (02), a front shield (03), a cutter head (04), and the crushing and slag removal system as described in claim 8; The crushing and slag removal system is installed on the rear supporting trolley (01), and one end of the screw conveyor (1) in the crushing and slag removal system is connected to the front shield (03); The fixed end of the main drive (02) is installed inside the front shield (03), and the drive end of the main drive (02) is equipped with a cutter head (04). The crushing and slag removal system is used to remove the slag generated by the cutterhead (04) during the tunneling process.

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