Anti-blocking sand bin device for subway synchronous grouting liquid production
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GULU TRANSPORTATION TECH CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-06-23
Smart Images
Figure CN224393535U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel construction equipment technology, specifically to an anti-clogging sand silo device for producing synchronous grouting fluid for subways. Background Technology
[0002] In subway tunnel construction, synchronous grouting is a key technical step, used to fill the gap between the tunnel segments and the ground after the tunnel boring machine advances. Synchronous grouting fluid is usually made by mixing raw materials such as sand, cement, fly ash, bentonite and water in proportion. Among them, sand (especially fine sand) is the main aggregate, which needs to be stored and used in large quantities.
[0003] Currently, the sand silos commonly used in synchronous grouting fluid production lines are mostly ordinary inverted cone or rectangular cone silos. In actual production, especially when storing fine sand or silt with slightly higher moisture content, the sand often forms an arched structure or only forms a channel for discharge in the center of the silo, particularly in the cone part, leading to poor or even interrupted discharge. The sand also tends to compact and clump near the bottom outlet of the silo due to pressure, humidity, or material characteristics, causing blockage of the discharge port.
[0004] To address the problems existing in the above-mentioned technologies, a clog-resistant sand silo device for synchronous grouting fluid production in subways is proposed. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides an anti-clogging sand silo device for the production of synchronous grouting fluid for subways, which overcomes the deficiencies of existing technologies and solves the problems mentioned in the background section.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a clog-resistant sand silo device for producing synchronous grouting fluid for subways, comprising a silo body, an inverted conical discharge cone located at the lower part of the silo body, and a discharge port located at the bottom end of the inverted conical discharge cone. The silo body is a cylindrical body, with the inverted conical discharge cone connected at the lower part to facilitate the flow of sand by gravity. It also includes...
[0007] A vibration arch-breaking mechanism is provided on the outer wall of the inverted conical discharge hopper. The mechanism includes at least one vibration motor, which is preferably installed in the lower middle part of the inverted conical discharge hopper.
[0008] A central flow guide and anti-blockage cone is fixedly installed at the central axis position inside the silo body and located above the inverted conical discharge cone. The central flow guide and anti-blockage cone includes a cone part and a connecting bracket, which is used to fix the cone part to the top of the silo body. The cone part is cone-shaped with a smaller top and a larger bottom. The maximum outer diameter of the cone part is smaller than the inner diameter of the cylindrical silo body, forming an annular flow guide channel between the bottom edge of the cone part and the inner wall of the silo body.
[0009] As a preferred embodiment of this utility model, the vibration arch-breaking mechanism includes at least one vibration motor installed on the outer wall of the inverted conical feeding cone.
[0010] As a preferred embodiment of this utility model, the vibration motor is mounted on the outer wall of the inverted conical discharge hopper via an elastic connector to reduce the vibration impact on the overall hopper body.
[0011] As a preferred technical solution of this utility model, it also includes a pneumatic flow aid device, which includes multiple air inlet nozzles disposed inside the conical wall of the inverted conical feeding cone, as well as pipelines and valves connected to an external air source, for introducing low-pressure air into the conical wall of the hopper when necessary to form an air film, further reducing the friction between the material and the hopper wall and preventing caking.
[0012] As a preferred technical solution of this utility model, the inner wall of the inverted conical feeding cone is a polished surface or lined with a polymer wear-resistant plate.
[0013] As a preferred technical solution of this utility model, the height of the bottom edge of the cone portion of the central guide anti-blocking cone is located near or slightly below the upper edge of the inverted cone-shaped discharge cone, ensuring that the sand material mainly enters the inverted cone-shaped discharge cone area through the annular guide channel.
[0014] As a preferred embodiment of this utility model, the discharge port is connected to a gate valve.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] By forcing materials to flow evenly and uniformly towards the cone wall through the central guide cone, combined with the targeted vibration of the anti-bridging mechanism for easily blocked areas, and optional pneumatic flow aids, multiple measures work synergistically to efficiently solve the problems of sand bridging, caking, and blockage of the discharge port, significantly reducing the frequency of silo cleaning. The main structure is an improvement on the conventional sand silo, with the added central cone and vibration mechanism having a simple structure that is easy to manufacture, install, and maintain. The vibration effect is concentrated in the cone, with minimal impact on the overall silo structure. Attached Figure Description
[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;
[0018] Figure 2 This is a front view schematic diagram of the present utility model;
[0019] Figure 3 For the present utility model Figure 2 Schematic diagram of the cross section at point AA;
[0020] Figure 4 For the present utility model Figure 1A magnified view of a portion of point A in the middle.
[0021] In the diagram: 1. Bin body; 2. Inverted cone-shaped discharge hopper; 3. Discharge port; 4. Conical part; 5. Connecting bracket; 6. Annular guide channel; 7. Vibration motor; 8. Elastic connector; 9. Air inlet nozzle; 10. Pipeline; 11. Gate valve. Detailed Implementation
[0022] 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.
[0023] Please see Figure 1-4 A clog-resistant sand silo device for producing synchronous grouting fluid for subways includes a silo body 1, an inverted conical discharge cone 2 located at the lower part of the silo body 1, and a discharge port 3 located at the bottom end of the inverted conical discharge cone 2. The silo body 1 is a cylindrical body, with the inverted conical discharge cone 2 connected at the bottom to facilitate the flow of sand by gravity. It also includes...
[0024] A vibration arch-breaking mechanism is provided on the outer wall of the inverted conical feeding cone 2. The mechanism includes at least one vibration motor 7, which is preferably installed in the lower middle part of the inverted conical feeding cone 2.
[0025] The central flow guide anti-blocking cone is fixedly installed at the central axis position inside the silo 1 and located above the inverted conical discharge cone 2. The central flow guide anti-blocking cone includes a cone part 4 and a connecting bracket 5. The connecting bracket 5 is used to fix the cone part 4 to the top of the silo 1. The cone part 4 is cone-shaped with a smaller top and a larger bottom. The maximum outer diameter of the cone part 4 is smaller than the inner diameter of the cylindrical body of the silo 1, and an annular flow guide channel 6 is formed between the bottom edge of the cone part 4 and the inner wall of the silo 1.
[0026] Specifically, the vibratory arch-breaking mechanism includes at least one vibratory motor 7 installed on the outer wall of the inverted conical feeding cone 2.
[0027] Specifically, the vibration motor 7 is installed on the outer wall of the inverted conical discharge hopper 2 via the elastic connector 8 to reduce the vibration impact on the entire hopper body 1.
[0028] Specifically, it also includes a pneumatic flow aid device, which includes multiple air inlet nozzles 9 installed inside the cone wall of the inverted conical feeding cone 2, as well as a pipeline 10 and valves connected to an external air source, used to introduce low-pressure air into the cone wall inside the hopper when necessary to form an air film, further reducing the friction between the material and the hopper wall and preventing caking.
[0029] Specifically, the inner wall of the inverted conical feeding hopper 2 is polished or lined with a polymer wear-resistant plate.
[0030] Specifically, the bottom edge of the cone part 4 of the central guide anti-blocking cone is located near or slightly below the upper edge of the inverted cone-shaped discharge cone 2, ensuring that the sand material mainly enters the area of the inverted cone-shaped discharge cone 2 through the annular guide channel 6.
[0031] Specifically, the discharge port 3 is connected to a gate valve 11.
[0032] Working principle: The sand enters the silo through the top of the silo and first falls on the cone surface of the central guide and anti-blocking cone. Due to the large cone angle (β≥65°), the sand is difficult to stay on its surface and will quickly slide to the bottom edge of the cone. It will then be evenly dispersed into the inverted cone-shaped discharge hopper 2 area below through the annular guide channel 6 formed by the cone and the silo wall. This effectively destroys the channel formed by the material in the central area and forces the material to flow along the cone wall.
[0033] When the sand material does not flow smoothly or shows a slight tendency to bridge in the inverted conical feeding hopper 2, the vibration motor 7 is started. The vibration is transmitted to the sand material layer inside through the hopper wall, which breaks the shear force and cohesion between the materials, causing the bridging to collapse, the compaction to loosen, and the fluidity to be restored. The vibration effect is mainly concentrated in the hopper area that is prone to clogging.
[0034] When the sand has high moisture content or extremely poor fluidity, the pneumatic flow aid device can be turned on. Low-pressure air is blown into the space between the inner wall of the cone hopper and the sand through the annular air cushion layer or nozzle, forming an air film that significantly reduces the friction between the sand and the hopper wall, prevents caking and adhesion, and promotes smooth slippage of the sand.
[0035] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A blockage-resistant sand silo device for producing synchronous grouting fluid for subways, comprising a silo body (1), an inverted conical discharge cone (2) located at the lower part of the silo body (1), and a discharge port (3) located at the bottom end of the inverted conical discharge cone (2), characterized in that: Also includes The vibration arch-breaking mechanism is installed on the outer wall of the inverted conical feeding cone (2); A central flow guide anti-blocking cone is fixedly installed at the central axis position inside the silo (1) and located above the inverted conical discharge cone (2); the central flow guide anti-blocking cone includes a cone part (4) and a connecting bracket (5); the cone part (4) is a cone shape with a smaller top and a larger bottom; the maximum outer diameter of the cone part (4) is smaller than the inner diameter of the cylindrical silo (1), and an annular flow guide channel (6) is formed between the bottom edge of the cone part (4) and the inner wall of the silo (1). The bottom edge of the cone portion (4) of the central flow guide anti-blocking cone is located near or slightly below the upper edge of the inverted cone-shaped feeding cone (2).
2. The anti-clogging sand silo device for synchronous grouting fluid production in subways according to claim 1, characterized in that: The vibration arch-breaking mechanism includes at least one vibration motor (7) installed on the outer wall of the inverted conical feeding cone (2).
3. The anti-clogging sand silo device for synchronous grouting fluid production in subways according to claim 2, characterized in that: The vibration motor (7) is mounted on the outer wall of the inverted conical feeding cone (2) via an elastic connector (8).
4. The anti-clogging sand silo device for synchronous grouting fluid production in subways according to claim 1, characterized in that: It also includes a pneumatic flow aid device, which includes multiple air inlet nozzles (9) disposed inside the cone wall of the inverted conical feeding cone (2), as well as a pipeline (10) and valves connected to an external air source.
5. The anti-clogging sand silo device for synchronous grouting fluid production in subways according to claim 1, characterized in that: The inner wall of the inverted conical feeding cone (2) is a polished surface or lined with a polymer wear-resistant plate.
6. The anti-clogging sand silo device for synchronous grouting fluid production in subways according to claim 1, Its features are: The discharge port (3) is connected to a gate valve (11).