Concrete pressurizing elephant trunk

Abstract

The utility model relates to a concrete pressurizing elephant trunk, which solves the problem that concrete aggregate is easy to separate during elephant trunk transportation, the upper end of the elephant trunk is positioned at the top of a pit, a small hole with the diameter of 90-110mm is drilled at a position 120-180Cm away from the lower port of the elephant trunk, a filter network is mounted in the small hole, a deflation control valve and a barometer are mounted after the filter network is safe, and a discharge control valve is positioned at the lower port of the elephant trunk. The rubber ball plug is installed in a pipe opening of the elephant trunk 2 before concrete is transported, the distance between the rubber ball plug and the pipe opening is 90-110 Cm, and the diameter of the rubber ball plug is 1%-3% larger than the inner diameter of the elephant trunk 2. The problem of concrete aggregate separation in the transportation process is solved, and the construction quality is ensured. The method is low in cost, high in efficiency, safe, flexible, efficient in transportation and easy to operate.

Description

Technical Field

[0001] The utility model relates to large-drop concrete conveying equipment, in particular to ultra-large-drop concrete fast conveying equipment over 100 meters. Background Art

[0002] When constructing ultra-deep shafts, inclined shafts, concrete linings, high slope concrete supports, etc., it is necessary to transport concrete from high places to low places to the pouring site, and the problem of rapid transportation of large drop concrete must be solved. According to traditional construction techniques, cranes (or winch systems) are generally used in conjunction with material transport carts, chutes, and conventional chute pipes. The above traditional techniques have the following main disadvantages:

[0003] Use crane (or winch system) with hanging tank for transportation. The transportation efficiency is low and the cost is high. When the construction site is limited, the equipment layout is difficult;

[0004] Use chute for transportation. During transportation, concrete aggregates are easily separated, which affects the quality of concrete. In engineering practice, engineering technicians have explored the improvement measures of using negative pressure chutes, but they still do not fundamentally solve the problem of aggregate separation, and are difficult to arrange, with high construction costs and limited transportation capacity;

[0005] Conventional chute transportation is adopted. When the drop height is large, the concrete aggregate is easily separated, which affects the quality of concrete. At the same time, since the concrete falling speed is not controlled, the inner wall of the chute wears quickly and the service life is limited. In engineering practice, engineering technicians have explored the use of BOX pipes and other slow-down measures, but the structure is complex, the operating cost is high, and the problem of aggregate separation is still not fundamentally solved. Summary of the invention

[0006] The utility model aims to provide a concrete pressure chute which solves the problem of aggregate separation during the transportation of concrete under large drop conditions, ensures construction quality, and has low cost, high efficiency, safety and flexibility, efficient transportation, and easy operation.

[0007] The utility model is achieved in this way:

[0008] Concrete booster chute, the upper end of the chute 2 is located at the top of the pit opposite to the outlet of the receiving hopper 6, and the lower end is located at the bottom of the pit. A small hole with a diameter of 90-110mm is drilled at 120-180cm from the lower end of the chute. After the filter network is installed in the small hole, the air release control valve 4 and the pressure gauge 10 are installed. The discharge control valve 5 is located at the lower end of the chute 2 to control the concrete discharge. The discharge control valve 5 and the chute 2 are connected. A sealing gasket is set at the joint. When the airtight performance of the chute is tested, the venting control valve 4 and the unloading control valve 5 are closed, and a sealing plug 9 is installed on the upper end of the chute. High-pressure gas is injected into the chute through the venting control valve 4. When the reading P of the pressure gauge 10 stably reaches the set sealing standard within the specified time T, it is deemed to have reached the sealing standard. The sealing plug 9 at the upper end of the chute is removed. Before transporting concrete, the soft ball plug 1 or the soft plunger is pressed into the mouth of the chute 2 at a distance of 90-110 cm from the mouth. The soft ball plug 1 or the soft plunger is made of solid material, and its diameter is 1% to 3% larger than the inner diameter of the chute 2. Concrete is slowly injected into the chute 2 through the receiving hopper 6 to cause the soft ball plug 1 or the soft plunger to move downward. When the amount of concrete in the receiving hopper 6 reaches the capacity limit and no longer decreases, the venting control valve 4 of the chute 2 is controlled to vent and adjust the downward speed of the concrete. At the same time, the concrete is continuously discharged. Pour concrete into the receiving hopper 6. Whenever the concrete in the receiving hopper 6 is exhausted, close the venting control valve 4 and the concrete will stop descending. Pour concrete into the receiving hopper 6 and repeat the above process until the soft ball plug 1 or the soft plunger descends to the end of the chute 2. Open the unloading control valve 5 and the soft ball plug 1 or the soft plunger flows out of the pipe together with the concrete. At this time, immediately close the unloading control valve 5 and remove the soft ball plug 1 or the soft plunger through the grate screen 11 placed at the end of the pipe 2 in advance. Open the unloading control valve 5 again and the concrete will flow to the pouring part or the receiving port at the bottom. At the same time, continue to pour concrete into the receiving hopper 6. The speed of concrete descent is adjusted by the unloading control valve 5. When the amount of concrete meets the pouring requirement, stop pouring concrete into the receiving hopper and empty all the concrete in the chute 2. The transportation work is finished. 2.

[0009] The chute 2 is composed of a standard chute section made of ordinary steel pipe. The inner diameter of the standard chute section is 380-420mm, the wall thickness is 4-6mm, and the length of the standard chute section is 5-7m. It is connected through the connecting flange 7 at its port. A water-stop gasket is installed at each flange connection to ensure its sealing.

[0010] The slide pipe 2 is fixed to the nearby rock wall through a fixing hoop 3 and an anchor rod 8.

[0011] The soft ball plug 1 or soft plunger is made of solid material and is pressed into the chute 2 to generate friction. After the receiving hopper 6 injects concrete, the concrete in the chute 2 overcomes the friction of the soft ball plug 1 or soft plunger to make it descend. Although the pressure of the concrete in the chute 2 is getting bigger and bigger, the resistance of the compressed air under the soft ball plug 1 or soft plunger is also getting bigger and bigger. The concrete in the chute 2 above the soft ball plug 1 or soft plunger keeps descending at a low speed and always fills the soft ball plug 1 or soft plunger and the chute 2 above it. When the soft ball plug 1 or soft plunger is removed from the chute 2, the concrete in the chute 2 flows to the casting part or the receiving port at the bottom through the discharge control valve 5. The concrete always fills the chute 2. The speed of the concrete in the chute 2 descending is adjusted by controlling the opening of the discharge control valve 5, and the speed of the concrete in the chute 2 descending is still controlled.

[0012] The advantages of the utility model are as follows:

[0013] It completely solves the problem of aggregate separation during the transportation of concrete under large drop conditions, ensures the quality of concrete construction, and has low transportation costs and high efficiency.

[0014] Since the material feeding speed can be completely controlled, the wear of the chute 2 by concrete is effectively solved, thereby increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the utility model. DETAILED DESCRIPTION

[0016] Concrete booster chute, the upper end of the chute 2 is located at the top of the pit opposite to the outlet of the receiving hopper 6, and the lower end is located at the bottom of the pit. A small hole with a diameter of 90-110mm is drilled at 120-180cm from the lower end of the chute. After the filter network is installed in the small hole, the air release control valve 4 and the pressure gauge 10 are installed. The discharge control valve 5 is located at the lower end of the chute 2 to control the concrete discharge. The discharge control valve 5 and the chute 2 are connected. A sealing gasket is set at the joint. When the airtight performance of the slide pipe is tested, the venting control valve 4 and the unloading control valve 5 are closed, and the sealing plug 9 is installed on the upper end of the slide pipe. High-pressure gas is injected into the slide pipe through the venting control valve 4. When the reading P of the pressure gauge 10 stably reaches the set sealing standard within the specified time T, it is deemed that the sealing standard is met, and the sealing plug 9 on the upper end of the slide pipe is removed. Before transporting concrete, press the soft ball plug 1 into the mouth of the slide pipe 2 at a distance of 90-110 cm from the mouth of the pipe. The rubber ball plug 1 is a solid rubber body, and its diameter is 1% to 3% larger than the inner diameter of the slide pipe 2. Slowly inject concrete into the slide pipe 2 through the receiving hopper 6 to cause the rubber ball plug 1 to move downward. When the amount of concrete in the receiving hopper 6 reaches the capacity limit and no longer decreases, the venting control valve 4 of the slide pipe 2 is controlled to vent and adjust the downward speed of the concrete. At the same time, continue Concrete is poured into the receiving hopper 6. Whenever the concrete in the receiving hopper 6 is exhausted, the venting control valve 4 is closed, and the concrete stops descending. Concrete is poured into the receiving hopper 6, and the above process is repeated until the rubber ball plug 1 descends to the end of the chute 2. The unloading control valve 5 is opened, and the rubber ball plug 1 flows out of the pipe mouth together with the concrete. At this time, the unloading control valve 5 is immediately closed, and the rubber ball plug 1 is screened out and taken away by the grate screen 11 placed at the end of the pipe mouth of the chute 2 in advance, and the unloading control valve 5 is opened again, and the concrete flows to the pouring part or the lower receiving port. At the same time, concrete is continuously poured into the receiving hopper 6. The descending speed of the concrete is adjusted by the unloading control valve 5. When the amount of concrete meets the pouring requirement, the injection of concrete into the receiving hopper is stopped, and the concrete in the chute 2 is completely emptied, and the transportation work is completed. The chute 2 is composed of a standard chute section made of ordinary steel pipe. The inner diameter of the standard chute section is 380-420mm, the wall thickness is 4-6mm, and the length of the standard chute section is 5-7m. It is connected through the connecting flange 7 at its port. A water-stop gasket is installed at each flange connection to ensure its sealing.

[0017] The chute 2 is composed of a standard chute section made of ordinary steel pipe. The inner diameter of the standard chute section is 400mm, the pipe wall thickness is 5mm, the standard chute section is 6m long, and is connected through the connecting flange 7 at its port. A water-stop gasket is installed at each flange connection to ensure its sealing.

[0018] The slide pipe 2 is fixed to the nearby rock wall through a fixing hoop 3 and an anchor rod 8.

[0019] The functions of each part are as follows:

[0020] Air release control valve 4 (commercial product). This valve is installed after drilling a small hole with a diameter of about 100mm at about 150cm from the end of the slide pipe to control the speed of concrete going down. A bypass pipe is installed on the pipeline connected to the valve to connect the pressure gauge 10.

[0021] Discharge control valve 5 (commercial product). Located at the end of chute 2, it is used to control the discharge of concrete. A sealing gasket is set at the joint between it and chute 2.

[0022] The receiving hopper 6 is located at the receiving platform at the head end of the slide pipe, and its lower mouth is connected to the slide pipe.

[0023] The slide pipe 2 is connected to the flange 7. It is used to connect the slide pipe. A water-stopping gasket is installed between the two flanges to ensure the sealing.

[0024] Anchor rod 8. Used to fix the slide pipe 2.

[0025] Sealing plug 9 is connected to the slide pipe 2 through a flange. A water-soft gasket is installed between the plug and the flange to ensure its sealing. It is used to check the sealing performance of the pipe in the early stage.

[0026] Barometer 10. Used to measure the pressure of air in the slide pipe.

[0027] The grate screen 11 is a steel mesh of 800mm*1000mm, and the mesh of the mesh is 250mm*250mm. The mesh steel bar diameter is about 10mm, and is used to take out the rubber ball plug 1. It is installed on a wheelbarrow 14.

[0028] Filter 12. Made of 5mm*5mm stainless steel wire mesh.

[0029] Bracket 13. is used to fix the slide pipe at the end of the slide pipe 2.

[0030] Wheelbarrow 14. For installing grate screen 11.

[0031] The construction steps of this utility model are as follows:

[0032] 1. Install the receiving hopper 6;

[0033] 2. Drill holes on the rock wall and install anchor rods 8 and hoop 3. The installation location and quantity are determined according to the rock wall conditions and force analysis;

[0034] 3. Install the slide pipe 2 section by section and fix it on the rock wall through anchor rods 8 and hoop 3;

[0035] 4. Place the rubber ball plug 1 about 100cm away from the opening of the slide pipe 2;

[0036] Test the airtightness of the chute. Close the venting control valve 4, the discharge control valve 5, and the upper sealing plug 9, and inject high-pressure gas into the chute. When the reading P of the pressure gauge 10 is stable and meets the standard within the specified time T, it is considered to have met the sealing standard. (Note: The P value and T value are determined according to the drop size during concrete pouring);

[0037] Take out the sealing plug 9, slowly inject concrete into the receiving hopper 6. When the amount of concrete in the receiving hopper 6 reaches the capacity limit and stops decreasing, the air release control valve 4 is controlled to release air to adjust the concrete downward speed, and the corresponding concrete is continuously injected into the receiving hopper 6. Whenever the concrete in the receiving hopper 6 is released, the air release control valve 4 is closed, and the concrete stops descending. Repeat the above process until the rubber ball plug 1 descends to the end of the chute 2.

[0038] When the rubber ball plug 1 moves down to the end of the chute 2, the discharge control valve 5 is opened, and the soft ball plug 1 flows out of the pipe mouth together with the concrete. At this time, the discharge control valve 5 is immediately closed, and the rubber ball plug 1 is screened out through the grate screen 11 (installed on a wheelbarrow) placed at the pipe mouth in advance and removed with the wheelbarrow. After the soft ball plug 1 is removed, the discharge control valve 5 is opened again, and the concrete flows to the pouring part or the lower receiving port, and at the same time, the upper receiving hopper 6 continues to inject concrete, and the speed of the concrete going down is adjusted by the discharge control valve 5.

[0039] When the amount of concrete meets the required amount for pouring, stop pouring concrete into the receiving hopper. (The remaining amount of concrete in the chute 2 and the receiving hopper 6 should be included in the calculation);

[0040] Empty all the concrete in the pipe and the transportation work is completed;

[0041] Cleaning and other work. After the transportation is completed, the inner wall of the pipe and the filter screen 12 should be cleaned in time, the venting control valve 4 and the unloading control valve 5 should be closed, and the sealing plug steel plate 9 should be sealed to prevent contamination in the pipe.

Claims

1. Concrete booster chute, characterized in that: The upper end of the chute (2) is located at the top of the pit, and the lower end is located at the bottom of the pit. A small hole with a diameter of 90-110 mm is provided at a position 120-180 cm from the lower end of the chute. A filter network and a sealing gasket are installed in the small hole, followed by an air release control valve (4) and a pressure gauge (10). A discharge control valve (5) is provided at the lower end of the chute for controlling the discharge of concrete. A sealing gasket is provided at the junction of the discharge control valve and the chute. Before transporting concrete, a soft ball plug or a soft plunger is pressed into the upper end of the chute at a position 90-110 cm from the upper end. The soft ball plug or the soft plunger is a solid body, and its diameter is 1% to 3% larger than the inner diameter of the chute.

2. The concrete boosting chute according to claim 1, characterized in that: The chute is composed of a standard chute section made of ordinary steel pipe. The inner diameter of the standard chute section is 380-420mm, the wall thickness is 4-6mm, and the length of the standard chute section is 5-7m. It is connected through the connecting flange 7 at its port. A water-stop gasket is installed at each flange connection to ensure its sealing.

3. The concrete boosting chute according to claim 1, characterized in that: The slide pipe is fixed to the nearby rock wall through a fixing hoop (3) and an anchor rod (8).

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