An arch top slurry drainage device for an arch bridge and its usage method

Abstract

The present invention discloses a slurry discharging device for the arch crown of an arch bridge and its operation method, belonging to the field of construction engineering. It includes a housing, a controller, a first on-off valve, a second on-off valve, and a sensor. A first connecting pipe communicating with the inside of the housing is arranged at the lower part of the housing, a slurry discharging pipe communicating with the inside of the housing is arranged on the outer side wall of the housing, and a second connecting pipe communicating with the inside of the housing is arranged on the outer side wall of the housing; the first on-off valve is arranged on the slurry discharging pipe to control the on-off of slurry discharging, and the second on-off valve is arranged on the second connecting pipe to control the on-off of the second connecting pipe; the sensor is arranged at the upper part inside the housing, and the controller is respectively connected to the first on-off valve, the second on-off valve, and the sensor; the controller receives the sensor signal and controls the opening or closing of the first on-off valve and the second on-off valve. It solves the problems that the slurry discharging process at the arch crown of a concrete-filled steel tube arch bridge is not easy to operate, has a low degree of automation, and the quality is not controllable.

Description

Technical Field

[0001] The present invention relates to the field of construction, and particularly to a slurry discharging device for the crown of an arch bridge and a using method thereof. Background Art

[0002] When pouring concrete into the pipe of a conventional concrete-filled steel tubular arch bridge, a certain proportion of the slurry for wetting the pump truck pipeline and the floating slurry of the concrete in the pipe need to be discharged. Among them, the quality of slurry discharging in the crown section directly affects the bearing capacity and service life of the overall structure. The key to controlling the quality of crown slurry discharging is to ensure that the slurry in the discharging pipe does not fall onto the main chord pipe. Since the vacuum pipe is directly connected to the discharging pipe, the current crown section slurry discharging needs to go through three processes: stopping slurry, removing the pipe, and discharging slurry; the specific process is to first stop the pouring of concrete, and then remove the vacuum pipe to enable the slurry to be discharged from the upper part of the discharging pipe; the interval time between the two processes of removing the pipe and discharging slurry is generally 7 - 12 minutes, and the existence of the interval time causes the slurry in the discharging pipe to fall back into the main chord pipe of the arch bridge, thereby reducing the compactness of the concrete in the crown section pipe and weakening the bearing capacity of the overall structure. The reasons for the slurry to fall back into the main chord pipe of the arch bridge are: 1. In order to prevent the slurry from filling the vacuum pipe and causing problems such as cracking or explosion of the vacuum pipe, the construction personnel on site remove the pipe in advance; 2. When removing the vacuum pipe, the slurry in the discharging pipe falls back into the main chord pipe under the action of atmospheric pressure. Summary of the Invention

[0003] The invention object of the present invention is, in view of the above problems, to provide a slurry discharging device for the crown of an arch bridge and a using method thereof, so as to solve the problems that the slurry discharging process of a concrete-filled steel tubular arch bridge is not easy to operate, has a low degree of automation, and the quality is not controllable.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a slurry discharging device for the crown of an arch bridge, including a housing, a controller, a first on-off valve, a second on-off valve, and a sensor. A first connecting pipe communicating with the inside of the housing is arranged at the lower part of the housing, a slurry discharging pipe communicating with the inside of the housing is arranged on the outer side wall of the housing, and a second connecting pipe communicating with the inside of the housing is arranged on the outer side wall of the housing; the first on-off valve is arranged on the slurry discharging pipe and controls the on-off of the slurry discharging, and the first on-off valve is arranged on the second connecting pipe and controls the on-off of the second connecting pipe; the sensor is arranged at the upper part inside the housing, and the controller is respectively connected with the first on-off valve, the second on-off valve, and the sensor; the controller receives the sensor signal and controls the opening or closing of the first on-off valve and the second on-off valve.

[0005] Further, an observation window is arranged on the side part of the housing, and the observation window is closed by a transparent or semi-transparent material.

[0006] Further, it further includes an acousto-optic device, which is connected to the controller. The controller receives the sensor signal and controls the acousto-optic device to be turned on or off.

[0007] Further, connection flanges are provided at the ends of the first connecting pipe, the slurry discharge pipe, and the second connecting pipe.

[0008] Further, the controller controls the on / off of the first on-off valve, the second on-off valve, and the acousto-optic device through a relay.

[0009] Further, both the first on-off valve and the second on-off valve are manual and electric integrated knife gate valves.

[0010] Further, the sensor is a pressure sensor.

[0011] Further, a start switch and a stop switch are provided on the housing. The start switch controls the power-on and start of the entire device, and the stop switch controls the power-off and stop of the entire device.

[0012] Further, a usage method of an arch bridge crown slurry discharge device is characterized by including the following steps:

[0013] S1. Install the entire device at the upper end of the slurry discharge pipe, so that the lower end of the first connecting pipe is tightly and fixedly connected to the upper end of the slurry discharge pipe, and the end of the second connecting pipe is connected to a vacuum pipe;

[0014] S2. In the initial state, control the first on-off valve to open and the second on-off valve to close, so that the main chord pipe, the vacuum rubber pipe, and the housing are connected and maintain a negative pressure;

[0015] S3. After the slurry in the main chord pipe reaches a certain height and contacts the lower end of the slurry discharge pipe, the slurry will be pushed into the slurry discharge pipe and the housing in sequence; the continuously increasing slurry in the housing will impact the pressure sensor, and the pressure sensor will send a pressure signal to the controller. The controller controls the first on-off valve to close and the second on-off valve to open, and the continuously increasing slurry in the housing will be discharged from the slurry discharge pipe, and that's it.

[0016] Due to adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0017] 1. The operation of the present invention is simple. When the slurry reaches the housing, the second on-off valve closes to prevent the slurry from entering the vacuum pipe, avoiding problems such as cracking or explosion of the vacuum pipe; it solves the problem of the interval time between pipe disassembly and slurry discharge, and the slurry in the slurry discharge pipe will not fall back to the main chord pipe, and quality problems are not likely to occur.

[0018] 2. By providing an observation window in the present invention, the staff can observe the internal situation of the housing in real time; by providing an acoustic-optic device, when the slurry rushes out from the upper end of the drain pipe and enters the housing and touches the sensor, the controller controls the acoustic-optic device to flash and emit a sound to alert the construction personnel; the first on-off valve and the second on-off valve are both manual and electric integrated knife gate valves. In the case where it is not convenient to energize, the first on-off valve and the second on-off valve can be manually controlled for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structure diagram of the present invention;

[0020] In the drawings, 1 - housing, 2 - controller, 3 - first on-off valve, 4 - second on-off valve, 5 - sensor, 6 - acoustic-optic device, 7 - start switch, 8 - stop switch, 9 - first connecting pipe, 10 - second connecting pipe, 11 - slurry discharge pipe, 12 - connecting flange, 13 - observation window. DETAILED DESCRIPTION OF THE INVENTION

[0021] The following further describes the specific implementation of the invention with reference to the drawings.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0025] Please refer to Figure 1 , a slurry discharging device for the arch crown of an arch bridge, comprising a housing 1, a controller 2, a first on-off valve 3, a second on-off valve 4, a sensor 5, an acoustic-optic device 6, a start switch 7 and a stop switch 8; a first connecting pipe 9 communicating with the inside of the housing 1 is arranged at the lower part of the housing 1, a slurry discharging pipe 11 communicating with the inside of the housing 1 is arranged on the outer side wall of the housing 1, and a second connecting pipe 10 communicating with the inside of the housing 1 is arranged on the outer side wall of the housing 1; an observation window 13 is arranged on the side part of the housing 1, and the observation window 13 is closed by a transparent or semi-transparent material. The first on-off valve 3 is arranged on the slurry discharging pipe 11 to control the on-off of slurry discharging, and the first on-off valve 3 is arranged on the second connecting pipe 10 to control the on-off of the second connecting pipe 10; the sensor 5 is arranged at the upper part inside the housing 1, and the sensing end of the sensor 5 is located inside the housing 1, and the controller 2 is respectively connected with the first on-off valve 3, the second on-off valve 4 and the sensor 5; the controller 2 receives the signal of the sensor 5 and controls the opening or closing of the first on-off valve 3 and the second on-off valve 4. The acoustic-optic device 6 is connected with the controller 2, and the controller 2 receives the signal of the sensor 5 and controls the opening or closing of the acoustic-optic device 6. The start switch 7 controls the power-on and startup of the whole device, and the stop switch 8 controls the power-off and stop of the whole device. In the present invention, the controller 2, the acoustic-optic device 6, the start switch 7 and the stop switch 8 are all arranged on the upper end surface of the housing 1. It should be noted that triggering the sensor 5 to transmit information to the controller 2, controlling the opening and closing of the on-off valve through the controller 2, and controlling the power-on and power-off of the device through the start switch 7 and the stop switch 8 are all prior arts, and will not be elaborated in this application.

[0026] In this embodiment, connecting flanges 12 are provided at the ends of the first connecting pipe 9, the slurry discharge pipe 11, and the second connecting pipe 10. By providing the connecting flanges 12, it is convenient to connect the entire device to the slurry discharge pipe, the vacuum pipe, etc. The controller 2 controls the on / off of the first on / off valve 3, the second on / off valve 4, and the sound and light device 6 through a relay. The first on / off valve 3 and the second on / off valve 4 are both manual and electric integrated knife gate valves, and the sensor 5 is a pressure sensor 5. By providing an observation window 13, the staff can observe the internal situation of the housing 1 in real time; by providing a sound and light device 6, when the slurry rushes out from the upper end of the drain pipe and enters the housing 1 and touches the sensor 5, the controller 2 controls the sound and light device 6 to flash and emit a sound to remind the staff to pay attention; the first on / off valve 3 and the second on / off valve 4 are both manual and electric integrated knife gate valves. In the case where it is not convenient to energize, the first on / off valve 3 and the second on / off valve 4 can be manually controlled for operation.

[0027] The usage method of an arch bridge crown slurry discharge device in this embodiment includes the following steps: S1. Install the entire device at the upper end of the slurry discharge pipe, and tightly and fixedly connect the lower end of the first connecting pipe 9 to the upper end of the slurry discharge pipe, and connect the end of the second connecting pipe 10 to the vacuum pipe; S2. In the initial state, the first on / off valve 3 is open, the second on / off valve 4 is closed, and the main chord pipe, the vacuum rubber pipe, and the housing 1 are connected and maintain a negative pressure. S3. When the slurry in the main chord pipe reaches a certain height and contacts the lower end of the drain pipe, the slurry is sucked into the drain pipe; then, as the slurry level in the main chord pipe continues to rise, due to the upward extrusion force of the concrete, the slurry will rush out from the upper end of the drain pipe and enter the housing 1, and will impact the pressure sensor 5; after that, the sensor 5 will send a pressure signal to the controller 2, and the controller 2 controls the first on / off valve 3 to close and the second on / off valve 4 to open, so that the continuously emerging slurry will be discharged from the slurry discharge pipe 11. Based on the above, the operation of the present invention is simple. When the slurry reaches the housing 1, the second on / off valve 4 is closed, preventing the slurry from entering the vacuum pipe and preventing problems such as cracking or explosion of the vacuum pipe; the slurry in the slurry discharge pipe will not fall back to the main chord pipe, and quality problems are not likely to occur.

[0028] The above description is a detailed description of the preferred feasible embodiment of the present invention, but the embodiment is not intended to limit the patent application scope of the present invention. Any equivalent changes or modifications made under the technical spirit disclosed by the present invention shall fall within the patent scope covered by the present invention.

Claims

1. A method for using a slurry discharging device at the crown of an arch bridge, characterized in that: The slurry discharging device at the crown of the arch bridge includes a housing, a controller, a first on-off valve, a second on-off valve, and a pressure sensor. A first connecting pipe communicating with the inside of the housing is arranged at the lower part of the housing. A slurry discharging pipe communicating with the inside of the housing is arranged on the outer side wall of the housing. A second connecting pipe communicating with the inside of the housing is arranged on the outer side wall of the housing. The first on-off valve is arranged on the slurry discharging pipe to control the on-off of the slurry discharging. The second on-off valve is arranged on the second connecting pipe to control the on-off of the second connecting pipe. The pressure sensor is arranged at the upper part inside the housing. The controller is respectively connected to the first on-off valve, the second on-off valve, and the pressure sensor. The controller receives the signal from the pressure sensor and controls the opening or closing of the first on-off valve and the second on-off valve. The usage method includes the following steps: S1. Install the whole device at the upper end of the slurry discharging pipe, so that the lower end of the first connecting pipe is tightly and fixedly connected to the upper end of the slurry discharging pipe, and the end of the second connecting pipe is connected to a vacuum pipe. S2. In the initial state, control the first on-off valve to open and the second on-off valve to close, so that the main chord pipe, the vacuum rubber pipe, and the housing are connected and maintain negative pressure. S3. After the slurry in the main chord pipe reaches a certain height and contacts the lower end of the slurry discharging pipe, the slurry will be successively pushed into the slurry discharging pipe and the housing. The continuously increasing slurry in the housing will impact the pressure sensor, and the pressure sensor will send a pressure signal to the controller. The controller controls the first on-off valve to close and the second on-off valve to open, and the continuously increasing slurry in the housing will be discharged from the slurry discharging pipe, and that's it.

2. The usage method of a slurry discharging device at the crown of an arch bridge according to claim 1, characterized in that: An observation window is arranged on the side of the housing, and the observation window is closed by a transparent or semi-transparent material.

3. The usage method of a slurry drainage device at the crown of an arch bridge according to claim 1, characterized in that: It further includes an acoustic-optic device, and the acoustic-optic device is connected to the controller. The controller receives the signal from the pressure sensor and controls the opening or closing of the acoustic-optic device.

4. The usage method of a slurry discharging device at the crown of an arch bridge according to claim 1, characterized in that: Connection flanges are arranged at the ends of the first connecting pipe, the slurry discharging pipe, and the second connecting pipe.

5. The usage method of a slurry discharging device at the crown of an arch bridge according to claim 3, characterized in that: The controller controls the on-off of the first on-off valve, the second on-off valve, and the acoustic-optic device through a relay.

6. The usage method of a slurry drainage device at the crown of an arch bridge according to claim 1, characterized in that: Both the first on-off valve and the second on-off valve are manual and electric integrated knife gate valves.

7. The usage method of a slurry discharging device at the crown of an arch bridge according to claim 1, characterized in that: A start switch and a stop switch are arranged on the housing. The start switch controls the power-on and start of the whole device, and the stop switch controls the power-off and stop of the whole device.

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