High-fall shield mortar discharging device

Abstract

The utility model discloses a high-fall shield mortar discharging device which comprises a screening device, a discharging pipeline, a mortar storage platform, a mortar storage tank, a stirring device and a discharging pipeline. The screening device is arranged on the ground along a shield path and comprises a receiving funnel; the slurry storage platform is arranged in a shield tunnel on the rear side of the shield tunneling machine; the slurry storage tank is arranged on the slurry storage platform; the stirring device is arranged at the top of the mortar storage tank and is used for stirring mortar in the mortar storage tank; the discharging pipeline is connected with a bottom opening of the screening device and a mortar inlet of the mortar storage tank and comprises a vertical section and a horizontal inclined section, and the vertical section is connected with the horizontal inclined section through an elbow. The number of the elbow connecting structures is less than five; the discharging pipeline and the discharging pipeline are each provided with an adjusting valve or a gate. The utility model discloses can realize the accurate control of unloading fall, improve the mortar stability, optimize the transportation efficiency, reduce the security risk, reduce equipment loss, enhance operation simplicity and convenience, improve the environmental protection performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction equipment design, and relates to a shield mortar discharging device for discharging materials with a high drop in shield construction. Background Art

[0002] In the field of shield construction, discharging materials with a high drop is a common problem with great technical difficulty. Due to the usually complex and changeable construction environment, the shield machine often needs to face the discharging requirements of different heights and distances during tunneling. Especially in some construction sites with large underground burial depth and narrow space, discharging materials with a high drop is even more crucial.

[0003] Due to the limitations of construction environment and conditions, traditional discharging methods often have problems such as large material loss, poor stability, low transportation efficiency, high safety risks, serious equipment wear, complex operation and poor environmental protection performance. Summary of the Invention

[0004] The purpose of the utility model is to provide a shield mortar discharging device for discharging materials with a high drop in shield construction.

[0005] The utility model is realized through the following technical solutions:

[0006] A high-drop shield mortar discharging device, characterized in that it includes: a screening device, a feeding pipeline, a slurry storage platform, a slurry storage tank, a stirring device and a discharging pipeline;

[0007] The screening device is arranged on the ground along the shield path, and includes a receiving hopper with an opening at the bottom of the hopper and a detachable and replaceable screen;

[0008] The slurry storage platform is arranged in the shield tunnel behind the shield machine and is a flat platform formed by welding steel beams with a height from the tunnel bottom surface;

[0009] The slurry storage tank is arranged on the slurry storage platform and is a cylindrical steel container with a slurry inlet at the top surface of the container and a slurry outlet at the bottom; the stirring device is arranged on the top of the slurry storage tank for stirring the mortar in the slurry storage tank;

[0010] The feeding pipeline connects the opening at the bottom of the screening device and the slurry inlet of the slurry storage tank, and includes a vertical section and a horizontal inclined section, and the vertical section and the horizontal inclined section are connected by an elbow; the vertical section is arranged almost vertically, and the horizontal inclined section forms an angle greater than 15 degrees with the horizontal; the elbow connection structure is less than 5;

[0011] The discharging pipeline connects the slurry outlet of the slurry storage tank;

[0012] Both the feeding pipeline and the discharging pipeline are provided with regulating valves or gates.

[0013] Furthermore, the elbow is connected to each pipeline through a clamp. A groove is pressed at the end of the elbow, and then the clamp is used to connect to each pipeline, and a matching sealing gasket is installed at the joint. The clamp usually consists of two semi-circular rings, with a protruding part on one semi-circular ring and a corresponding groove part on the other semi-circular ring. When the two semi-circular rings are closed, the protruding part and the groove part fit tightly to form a firm connection.

[0014] Furthermore, the stirring device includes a mixer and a speed reduction device arranged at the top of the slurry storage tank, and a stirring paddle located in the slurry storage tank and drivingly connected to the speed reduction device.

[0015] Furthermore, the top surface of the slurry storage tank is provided with an openable cover plate for opening during the maintenance of the slurry storage tank and closing during operation. The size of the cover plate needs to match the top surface of the slurry storage tank, and it is usually made of materials with corrosion resistance, wear resistance and high strength, such as stainless steel; and bolts are used to connect the cover plate to the tank body to form a sealed whole.

[0016] Furthermore, the elbow adopts a reducing elbow for connecting pipelines with different calibers. The caliber relationship between the elbow and each pipeline depends on the actual on-site requirements. The caliber of the elbow needs to match the caliber of the connected pipeline to ensure the smooth flow of the fluid. When connecting pipelines with different calibers, a reducing elbow is used to achieve a smooth transition.

[0017] Furthermore, bypass flushing pipelines including valves are provided through openings on both the feeding pipeline and the discharging pipeline for flushing the pipelines after the shield mortar discharging is completed.

[0018] For the feeding pipeline of the present utility model, galvanized steel pipes and clamps are used for the overall installation. During the installation process of the feeding pipeline, the addition of elbows is minimized as much as possible to avoid pipeline blockage. A stirring device and a portable detachable cover plate are installed on the top of the slurry storage tank to prevent the segregation and splashing of the mortar. The use of galvanized steel pipes for the feeding pipeline ensures the corrosion resistance and durability of the pipeline, and can adapt to the complex and changeable environment in shield construction; the clamp connection method simplifies the installation process, while ensuring the reliability and tightness of the connection, reducing the risk of pipeline leakage.

[0019] The present utility model reduces the setting of elbows. In the design of the feeding pipeline, the number of elbows is minimized as much as possible to reduce the flow resistance of the mortar in the pipeline and ensure the smooth transportation of the mortar; at the necessary elbows, large-caliber elbow designs are used to further reduce the resistance of the mortar at the elbows and avoid the deposition and blockage of the mortar.

[0020] The present utility model precisely controls the discharge drop by accurately designing the length and height of the feeding pipeline and combining with the on-site construction conditions; a regulating valve or a gate is arranged in the feeding pipeline to further finely adjust the discharge flow rate and avoid the possibility of pipe bursting.

[0021] In the utility model, a stirring device is installed on the top of the slurry storage tank to stir the mortar in the slurry storage tank regularly, preventing the segregation and precipitation of the mortar; the design of the stirring device should consider the balance between stirring efficiency and energy consumption to ensure uniform mixing of the mortar during the stirring process.

[0022] The utility model adopts a portable and detachable cover plate design, which is convenient for the staff to open or close the slurry storage tank at any time for adding and inspecting the mortar. At the same time, the slurry storage tank needs to be cleaned regularly; the cover plate should have good sealing performance to ensure that the mortar will not leak or splash during unloading or storage.

[0023] In the design of the utility model, the elbows and resistance in the feeding pipeline and the stirring device in the slurry storage tank are minimized, which can maintain the stability of the mortar during transportation and storage, reducing the segregation and precipitation of the mortar. The smooth design of the feeding pipeline and the stirring device in the slurry storage tank ensure the smooth transportation and continuous supply of the mortar, thus improving the transportation efficiency.

[0024] The use of galvanized steel pipes and clamp connections in the utility model improves the reliability and sealing performance of the pipeline, reducing the risk of mortar leakage and splashing; the use of the stirring device can prevent the mortar from caking or precipitating in the slurry storage tank, reducing the risk of pipeline blockage and cleaning caused by caking.

[0025] By precisely controlling the unloading drop height and reducing the resistance of the mortar in the pipeline, the utility model can reduce the occurrence of pipeline wear and mechanical failures, extending the service life of the equipment. The device of the utility model is applicable to the drop height between 20 and 50 meters, which can ensure the smooth flow of the mortar without blockage.

[0026] Through the improvement of the feeding pipeline and the top structure of the slurry storage tank, the utility model realizes the precise control of the unloading drop height, improves the stability of the mortar, optimizes the transportation efficiency, reduces the safety risk, reduces the equipment loss and enhances the environmental protection performance. Applying this device in the shield construction process can significantly improve the construction efficiency and quality, reduce the construction cost and safety risk. Description of the Drawings

[0027] Overall schematic diagram of the high-drop shield mortar unloading device of the utility model;

[0028] In the figure, 1. screening device, 2. feeding pipeline, 3. slurry storage platform, 4. slurry storage tank, 5. stirring device, 6. unloading pipeline. Detailed Embodiments

[0029] The following further describes the utility model in combination with the detailed embodiments. The detailed embodiments are further explanations of the principle of the utility model and do not limit the utility model in any way. The same or similar technologies to the utility model do not exceed the protection scope of the utility model.

[0030] Combined with the attached drawings.

[0031] As shown in the figure, the shield mortar discharging device for discharging with a high drop in shield construction of this embodiment includes: a screening device 1, a feeding pipeline 2, a slurry storage platform 3, a slurry storage tank 4, a stirring device 5, and a discharging pipeline 6.

[0032] The shield mortar is stored in the slurry storage tank 4 on the slurry storage platform 3 through the screening device 1 along the feeding pipeline 2, and the discharging of the slurry storage tank 4 is controlled by the gate valve of the discharging pipeline 6.

[0033] Design of the screening device: The whole is made of welded steel plates, with an opening under the hopper, and a portable detachable screen is placed at the opening, and the screen can be replaced according to different situations such as mortar or concrete.

[0034] Design of the feeding pipeline: Galvanized steel pipes and clamps are selected for connection to ensure that the pipeline is corrosion-resistant, durable, easy to install, and reliably sealed; the number of elbows in the pipeline is minimized to avoid pipeline blockage and ensure the smooth flow of mortar; for necessary elbows, a large-diameter reducing design is adopted to further reduce the resistance of the mortar at the elbows. A regulating valve or a gate is set in the pipeline to achieve fine adjustment of the discharging flow rate and ensure the uniform supply of mortar.

[0035] Design of the slurry storage tank: The whole slurry storage tank is a cylindrical barrel, and a stirring device is installed at the top to stir the mortar to prevent segregation and precipitation; the design of the stirring device should take into account both the stirring efficiency and the energy consumption balance to ensure uniform mixing of the mortar; the top of the slurry storage tank adopts a portable detachable cover design, which is convenient for staff to add and inspect the mortar, and at the same time, the slurry storage tank needs to be cleaned regularly; the cover should have good sealing performance to ensure that the mortar will not leak or splash during storage.

[0036] Design of the slurry storage platform: The slurry storage platform for placing the slurry storage tank needs to be subjected to reasonable stress analysis and calculation and is formed by welding to ensure its overall stability. The whole slurry storage platform is made of welded 20A I-beams, 20B channel steels, and 10-mm-thick steel plates.

[0037] Design of the discharging pipeline: The discharging pipe is processed using DN100, DN150, and DN200 galvanized pipes, with an opening at the bottom side below the slurry storage tank, and the opening size is determined according to the model of the discharging pipe used. Supports can be added on the side if necessary to ensure its stability.

[0038] The relationship between the diameter of the elbow and the diameter of each pipeline mainly depends on the actual on-site requirements. The diameter of the elbow needs to match the diameter of the connected pipeline to ensure the smooth flow of the fluid. When connecting pipelines with different diameters, a reducing elbow is used to achieve a smooth transition.

[0039] To avoid pipeline blockage, a DN50 flushing pipeline can be welded at an appropriate position of the pipeline after opening, and the pipeline should be flushed in time after the shield mortar unloading is completed.

Claims

1. A high drop shield mortar unloading device, characterized in that: include: Screening device, material discharge pipeline, slurry storage platform, slurry storage tank, stirring device and discharge pipeline; The screening device is arranged on the ground along the shield path, and includes a receiving funnel, the bottom of which is open and provided with a detachable and replaceable screen; The slurry storage platform is set in the shield tunnel behind the shield machine. It is a flat platform with a height above the bottom of the tunnel formed by welding steel beams. The slurry storage tank is arranged on the slurry storage platform and is a cylindrical steel container. The top surface of the container is provided with a mortar inlet and the bottom surface is provided with a slurry outlet. The stirring device is arranged on the top of the slurry storage tank to stir the mortar in the slurry storage tank. The feed pipe connects the bottom opening of the screening device with the mortar inlet of the slurry storage tank, including a vertical section and a horizontal inclined section, and the vertical section and the horizontal inclined section are connected by an elbow; the vertical section is nearly vertically arranged, and the horizontal inclined section forms an angle greater than 15 degrees with the horizontal; there are less than 5 elbow connection structures; The discharge pipeline is connected to the mortar outlet of the slurry storage tank; Both the feeding pipeline and the unloading pipeline are equipped with regulating valves or gates.

2. The high drop shield mortar unloading device according to claim 1 is characterized in that: The elbow is connected to each pipeline via a clamp.

3. The high drop shield mortar unloading device according to claim 1 is characterized in that: The stirring device comprises a stirrer and a speed reducer arranged on the top of the slurry storage tank, and a stirring blade located in the slurry storage tank and drivingly connected to the speed reducer.

4. The high drop shield mortar unloading device according to claim 1 is characterized in that: The top surface of the slurry storage tank is provided with an openable and closable cover plate for opening the slurry storage tank for inspection and closing during operation.

5. The high drop shield mortar unloading device according to claim 1 is characterized in that: The elbow is a reducing elbow for connecting connecting pipes of different calibers.

6. The high drop shield mortar unloading device according to claim 1 is characterized in that: The feed pipeline and the discharge pipeline are both provided with bypass flushing pipelines including valves for flushing the pipelines after the shield mortar is discharged.

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