Dam concrete horizontal transportation environment control device

Abstract

A dam concrete horizontal transportation environment control device comprises an underground tunnel which is annularly arranged, the discharging position and the feeding position of the underground tunnel are each provided with a heat preservation windproof door, the top and the two sides of the underground tunnel are each provided with a spraying pipeline, and the spraying pipelines are arranged in a linear section, located between the discharging position and the feeding position, of the underground tunnel. The method can improve the transportation environment of dam concrete horizontal transportation.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydropower engineering dam construction, in particular to a dam concrete horizontal transportation environment control device. Background Art

[0002] The dam concrete can be transported from the mixing station to the dam shoulder reclaiming platform by underground tunnel rail. That is, an underground tunnel is excavated along a straight path between the mixing station and the reclaiming platform, and tracks are laid in the underground tunnel to achieve continuous transportation of concrete.

[0003] This mode of transportation is more efficient than transport by mixing tank truck, but the concrete mixing process contains a certain amount of ammonia, and some ammonia will be released during transportation. Since concrete needs to be protected from wind during transportation, the ventilation performance of underground tunnels is usually poorly designed, and the ammonia in the tunnel will accumulate more and more and cannot be discharged in time, posing safety risks such as poisoning and explosion.

[0004] In addition, although the tunnel is warm in winter and cool in summer, refrigeration measures are generally required for mixing dam concrete. The temperature at the mixing station outlet is 7℃-12℃. Existing tunnel transportation usually does not consider temperature recovery control measures for horizontal transportation in the tunnel. Utility Model Content

[0005] The utility model provides a dam concrete horizontal transportation environment control device to solve the problem of poor horizontal transportation environment of dam concrete.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A device for controlling the environment for horizontal transportation of dam concrete comprises a ring-shaped underground tunnel, wherein both the discharge and feed points of the underground tunnel are provided with heat-insulating and wind-proof doors, and the top and both sides of the underground tunnel are provided with spray pipes, wherein the spray pipes are arranged in a straight section of the underground tunnel between the discharge and feed points.

[0008] Furthermore, a feed channel is opened at the top of the underground tunnel, the feed channel is connected to the mixing station, and an insulation cover capable of opening and closing the feed channel is provided in the feed channel.

[0009] Furthermore, the thermal insulation cover includes a first plate body and a second plate body, and a control member is provided between the side of the first plate body facing the underground tunnel and the side of the second plate body facing the underground tunnel and the side wall of the feed channel, and the control member drives the first plate body and the second plate body to rotate toward the underground tunnel.

[0010] Furthermore, a drainage ditch is provided at the bottom of the underground tunnel. The drainage ditch is provided along the entire length of the laying section of the spray pipe, and the bottom wall of the underground tunnel is inclined toward the drainage ditch.

[0011] Furthermore, an ammonia collection box is provided at the end of the drainage ditch.

[0012] Furthermore, the inner wall of the underground tunnel is sprayed with an insulation layer.

[0013] Furthermore, a temperature control cabinet, a temperature and humidity monitor, a wind speed monitor, and an ammonia concentration monitor are arranged in the underground tunnel.

[0014] Furthermore, in the section of the underground tunnel where the spray pipe is provided, a plurality of air holes are spaced apart from the top wall upwards, the air holes are connected to the outside, and a cover capable of closing the air holes is provided on the ground surface.

[0015] The utility model can achieve the following beneficial effects:

[0016] 1. The present application sets up heat-insulating and windproof doors in underground tunnels to reduce the impact of the external environment on the temperature and humidity of the underground tunnel transportation section; by arranging spray pipes with spray holes above and on the sides of the underground tunnel, not only can the humidity in the underground tunnel be kept constant and the evaporation of moisture in the transported concrete be reduced, but the ammonia released from the concrete can also be fully dissolved, thereby reducing the risk of ammonia poisoning and explosion, and reducing the ammonia content on the concrete silo surface, thereby improving the space environment for horizontal transportation of concrete.

[0017] 2. Spraying an insulation layer on the inner wall of the underground tunnel and arranging a temperature control cabinet in the underground tunnel can, on the one hand, reduce the impact of the external environment on the temperature inside the underground tunnel. On the other hand, when the temperature of the underground tunnel exceeds the temperature of the concrete outlet, the spray pipe can be used to cool it down. When the temperature of the underground tunnel is lower than the temperature of the concrete outlet, the cover can be opened to connect the underground tunnel with the outside world, heat up the interior of the underground tunnel, and thus keep the ambient temperature of the underground tunnel constant.

[0018] 3. An ammonia collection box is set up to collect the ammonia formed in the underground tunnel, so that the ammonia can be reused to improve economic and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic plan view of a dam concrete horizontal transportation environment control device according to the present utility model;

[0021] Figure 2 for Figure 1 Cross-section at AA in the middle;

[0022] Figure 3 for Figure 1 Cross-section view at the middle BB.

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Underground tunnel; 11. Discharge port; 2. Insulated windproof door; 3. Spray pipe; 4. Feed channel; 5. Insulated cover; 51. First plate; 52. Second plate; 53. Control element; 6. Drainage ditch; 7. Air vent; 8. Cover. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0026] like Figures 1 to 3 As shown, an environmental control device for horizontal transportation of dam concrete includes a circular underground tunnel 1 with a feed channel 4 formed at the top of the tunnel. The upper end of the feed channel 4 is connected to a mixing station, allowing concrete produced by the mixing station to be discharged directly into a concrete transport vehicle through the feed channel 4, achieving horizontal transportation of the concrete. A discharge port 11 is provided near the reclaiming platform of the underground tunnel 1. The section of the underground tunnel 1 between the discharge port 11 and the feed channel 4 is a straight section. After the concrete is transported from the feed channel 4 to the discharge port 11, the transport vehicle continues to move along the underground tunnel 1, circling the underground tunnel 1 once, and then returns to the feed channel 4 for loading of the concrete.

[0027] A spray pipe 3 with fine holes runs the entire length of the straight section between the discharge port 11 and the feed channel 4 in the underground tunnel 1. A water mist generator and temperature control cabinet are also located at appropriate locations within the tunnel 1, enabling real-time temperature monitoring within the tunnel 1. During concrete transportation, atomized water vapor is sprayed into the tunnel 1 through the spray pipe 3, maintaining humidity within the tunnel 1. This also dissolves and absorbs ammonia released from the concrete, reducing its ammonia content on the concrete surface. This effectively mitigates the risk of explosions and poisoning caused by excessive ammonia concentrations within the tunnel 1.

[0028] Drainage ditches 6 are excavated at the bottom of underground tunnel 1. These ditches are located on both sides of the tunnel, but only in the section where the spray pipes 3 are laid. The water mist sprayed into the tunnel 1 by the spray pipes 3 reacts with ammonia gas generated during concrete transportation, forming ammonia water, which then collects in the drainage ditches 6. An ammonia water collection tank is also located at the end of the drainage ditches 6, and the ditches 6 are angled toward the tank, allowing the ammonia water in the ditches to be collected more smoothly.

[0029] An insulation layer, specifically polyurethane, is sprayed onto the inner wall of underground tunnel 1. Furthermore, insulation and windproof doors 2 are installed at both the discharge port 11 and the feed channel 4. These doors are opened upon the arrival of a concrete transport vehicle and closed after the vehicle passes through. The insulation and windproof doors 2 reduce the impact of the external environment on the temperature and humidity within underground tunnel 1, and the insulation layer maintains a stable environment within tunnel 1.

[0030] An insulation cover 5 is installed within the feed channel 4. The insulation cover 5 comprises a first plate 51 and a second plate 52. A control member 53 is disposed between the side of the first plate 51 facing the underground tunnel 1 and the side of the second plate 52 facing the underground tunnel 1, and the sidewall of the feed channel 4. The control member 53 can be a drive spring. The control member 53 drives the first and second plates 51, 52 to rotate toward the underground tunnel 1, automatically opening when the concrete transport vehicle receives the concrete. After concrete loading is completed, the first and second plates 51, 52 are driven to rotate, causing the insulation cover 5 to block the feed channel 4. The feed channel 4 can then be freely opened and closed by the control member 53.

[0031] In addition, along the direction of laying of the spray pipe 3, a plurality of air vents 7 are spaced upwardly from the top of the underground tunnel 1. The air vents 7 connect the external environment with the interior of the underground tunnel 1. A cover 8 is also provided on the surface to seal the air vents 7. By opening and closing the air vents 7 by the cover 8, the connection between the interior of the underground tunnel 1 and the external environment is controlled, thereby controlling the temperature inside the underground tunnel 1. On the one hand, when the humidity inside the underground tunnel 1 is high, the moisture can be discharged through the air vents 7. On the other hand, when the temperature inside the underground tunnel 1 is low, the air vents 7 can be opened to increase the temperature inside the underground tunnel 1.

[0032] A humidity monitor, a wind speed monitor and an ammonia concentration monitor are also arranged in the underground tunnel 1 , which are used to monitor the humidity, wind speed and ammonia concentration of the internal environment of the underground tunnel 1 respectively.

[0033] According to the dam concrete pouring plan, the water mist generator is activated in advance, spraying water through the fine holes in the spray pipe 3 into the underground tunnel 1. The temperature control cabinet is set to the same temperature as the concrete at the exit, and the temperature control cabinet is activated. When the temperature and humidity in the underground tunnel 1 reach the preset requirements and the mixing system receives the mixing production instruction, concrete mixing begins. The transport vehicle advances to the feed channel 4. Once the concrete mixing is complete, the insulation cover 5 is opened to unload the concrete into the transport vehicle. After unloading is completed, the insulation cover 5 is closed.

[0034] The transport cart transports the concrete along the track to the cable crane bucket reclaim point near the dam reclaim platform, where the concrete inside the cart is transferred to the cable crane bucket. During transportation, the water mist within underground tunnel 1 absorbs the ammonia released by the concrete, forming ammonia water. This ammonia water is then drained through drainage ditch 6 to an ammonia water collection tank for recycling. Furthermore, an insulation layer is sprayed inside underground tunnel 1, and insulated windproof doors 2, an insulated cover plate 5, and air vents 7 are installed. A temperature control cabinet is used to maintain consistency between the temperature inside underground tunnel 1 and the temperature at the machine outlet. This helps minimize concrete temperature rise, ensures controlled concrete temperature, and improves the environment for horizontal concrete transportation.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dam concrete horizontal transportation environment control device, characterized by: The invention comprises an annular underground tunnel (1), wherein the discharge point and the feed point of the underground tunnel (1) are both provided with heat-insulating and windproof doors (2), and the top and both sides of the underground tunnel (1) are both provided with spray pipes (3), and the spray pipes (3) are arranged in a straight section of the underground tunnel (1) between the discharge point and the feed point.

2. The dam concrete horizontal transportation environment control device according to claim 1, characterized in that: A feed channel (4) is provided at the top of the underground tunnel (1), the feed channel (4) being connected to a mixing station, and a heat-insulating cover plate (5) capable of opening and closing the feed channel (4) being provided in the feed channel (4).

3. The dam concrete horizontal transportation environment control device according to claim 2, characterized in that: The heat-insulating cover plate (5) comprises a first plate body (51) and a second plate body (52), wherein a control member (53) is provided between the side of the first plate body (51) facing the underground tunnel (1) and the side of the second plate body (52) facing the underground tunnel (1) and the side wall of the feed channel (4), and the control member (53) drives the first plate body (51) and the second plate body (52) to rotate toward the underground tunnel (1).

4. The dam concrete horizontal transportation environment control device according to claim 1, characterized in that: A drainage ditch (6) is provided at the bottom of the underground tunnel (1), the drainage ditch (6) is provided along the entire length of the laying section of the spray pipe (3), and the bottom wall of the underground tunnel (1) is inclined toward the drainage ditch (6).

5. The dam concrete horizontal transportation environment control device according to claim 4, characterized in that: An ammonia collection box is provided at the end of the drainage ditch (6).

6. The dam concrete horizontal transportation environment control device according to claim 1, characterized in that: The inner wall of the underground tunnel (1) is sprayed with a thermal insulation layer.

7. The dam concrete horizontal transportation environment control device according to claim 1, characterized in that: A temperature control cabinet, a humidity monitor, a wind speed monitor, and an ammonia concentration monitor are arranged in the underground tunnel (1).

8. The dam concrete horizontal transportation environment control device according to claim 1, characterized in that: The underground tunnel (1) is provided with a plurality of air holes (7) spaced apart from the top wall upward in the section where the spray pipe (3) is provided. The air holes (7) are communicated with the outside world, and a cover (8) capable of closing the air holes (7) is provided on the ground surface.

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