Top contact detection limiting mechanism of tunnel vault filling pipe

Abstract

The utility model discloses a top contact detection limiting mechanism of a tunnel vault filling pipe, which comprises a base, a movable top cover, a spring, a limiting bolt, a sealing ring and a proximity detection switch, the base is fixedly arranged at the top end of the filling pipe, and the movable top cover is movably sleeved on the base and can move up and down; the spring is vertically installed on the base, and the top of the spring makes contact with the movable top cover and provides upward elastic force for the movable top cover. The limiting bolt vertically penetrates through the movable top cover, the bottom of the limiting bolt is fixedly connected to the base through threads, a top cap of the limiting bolt conducts elevation limiting on the movable top cover, a cover hood is further arranged on the movable top cover and covers the limiting bolt, a height space is reserved in the cover hood, and allowance is provided for ejection of the limiting bolt; the proximity detection switch is embedded in the base and used for detecting whether the movable top cover is pressed downwards or not. The device can detect whether the top end of the infusion tube reaches the top surface of a tunnel or not when the infusion tube is driven by the linear driving actuator to move upwards.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction, and in particular relates to a top contact detection and limiting mechanism for a tunnel vault pouring pipe. Background Art

[0002] The secondary lining of a tunnel is a key process in the field of tunnel construction. When pouring the tunnel vault, the traditional concrete lining formwork trolley uses a concrete delivery pump truck to pour concrete from the bottom to the top through pumping pressure, so that the concrete is poured into the cavity between the surface of the formwork trolley and the rock surface. The outlet of the existing pouring pipe is located at a low position. During the pouring of concrete, the outlet will gradually be buried under the concrete. The concrete will exert pressure and obstruction on the outlet, which is not conducive to the pouring of concrete. In addition, after the concrete is filled, after a period of time, the concrete will converge and solidify, resulting in a certain amount of settlement, and then a large cavity may be generated at the top of the cavity. At this time, since the outlet of the pouring pipe is buried at the bottom of the concrete and the fluidity of the concrete decreases, it is difficult to continue to pour new concrete into the cavity to fill the cavity.

[0003] Therefore, it is necessary to raise the injection pipe to the top surface of the tunnel vault during injection so that the outlet of the injection pipe is at a higher position. How to detect whether the top of the injection pipe reaches the tunnel top surface is a technical problem that needs to be solved. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and provides a top contact detection and limiting mechanism for a tunnel vault pouring pipe.

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

[0006] A top-touching detection limit mechanism for a tunnel vault grouting pipe comprises a base, a movable top cover, a spring, a limit bolt, a sealing ring and a proximity detection switch, wherein the base is fixedly mounted on the top of the grouting pipe, and the movable top cover is movably mounted on the base and can move up and down; the spring is vertically mounted on the base, and the top of the spring contacts the movable top cover to provide an upward elastic force for the movable top cover; the limit bolt vertically penetrates the movable top cover, and the bottom of the limit bolt is fixedly connected to the base by a thread, and the top cap of the limit bolt limits the movable top cover in elevation, and a cover is also provided on the movable top cover to cover the limit bolt, and a height space is reserved in the cover to provide a margin for the ejection of the limit bolt; the proximity detection switch is embedded in the base to detect whether the movable top cover is pressed downward.

[0007] In the above technical solution, a top surface is arranged on the top of the perfusion tube, a top contact detection limit mechanism is arranged above the top surface, and an outlet is arranged on the side wall of the top of the perfusion tube.

[0008] In the above technical solution, a wire groove is opened on the outer wall of the perfusion pipe, and the cable of the proximity detection switch of the top detection limit mechanism is embedded in the wire groove and led downward along the wire groove to the control system, and then the detection signal is sent to the control system.

[0009] In the above technical solution, a sealing ring is arranged on the outer wall of the base of the top detection limit mechanism, which ensures the sealing between the base and the movable top cover to prevent concrete from entering the top detection limit mechanism and causing damage to it during the pouring process into the tunnel arch.

[0010] The advantages and beneficial effects of the utility model are:

[0011] A top-touching detection limit mechanism is arranged at the top of the pouring pipe of the utility model, which can detect whether the top of the pouring pipe reaches the tunnel top surface when the pouring pipe moves upward under the drive of the linear drive actuator, and sends a signal to the control system after reaching the tunnel top surface, so that the control system controls the linear drive actuator to stop, so that the pouring pipe reaches and stops at the pouring working position, at which the outlet of the pouring pipe is close to the tunnel top surface (and the outlet of the pouring pipe is arranged on the side of the top of the pouring pipe), so that during pouring, concrete is discharged from the outlet of the pouring pipe and falls downward, and the height of the outlet is higher than the liquid level of the injected concrete, so the outlet will not be hindered, thereby improving the pouring speed and reducing the pumping pressure; and because the outlet of the pouring pipe is close to the tunnel top surface, even if a cavity is generated at the top of the pouring cavity due to the settlement of the concrete, new concrete can continue to be filled into the cavity.

[0012] A sealing ring is arranged on the outer wall of the base of the top detection limit mechanism of the utility model, and the sealing ring ensures the sealing between the base and the movable top cover, so as to prevent concrete from entering the top detection limit mechanism and causing damage thereto during the process of pouring into the tunnel vault. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the top-touch detection limit mechanism of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the dome perfusion device of the second embodiment which can drive the perfusion pipe to move up and down.

[0015] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below in conjunction with specific embodiments.

[0017] Embodiment 1

[0018] The utility model provides a top detection and limiting mechanism for a tunnel vault pouring pipe, such as Figure 1 As shown, a top detection limit mechanism 2 is provided at the top of the perfusion pipe 1 to detect whether the top of the perfusion pipe reaches the top surface of the tunnel when the perfusion pipe moves upward. A top surface 1.2 is provided at the top of the perfusion pipe 1, and the top detection limit mechanism 2 is provided above the top surface 1.2. An outlet 1.1 is provided on the top side wall of the perfusion pipe 1. When the top detection limit mechanism 2 detects that the top of the perfusion pipe reaches the top surface of the tunnel, the perfusion pipe 1 is perfused.

[0019] Specifically, the top-touch detection limit mechanism 2 includes a base 2.1, a movable top cover 2.2, a spring 2.3, a limit bolt 2.4, a sealing ring 2.5 and a proximity detection switch 2.6. The base 2.1 is fixedly mounted on the top of the perfusion tube 1, and the movable top cover 2.2 is movably mounted on the base 2.1 and can move up and down; the spring 2.3 is vertically mounted on the base 2.1 through a spring fixing ring 2.7, and the top of the spring 2.3 contacts the movable top cover 2.2 to provide an upward elastic force for the movable top cover 2.2. Furthermore, the number of springs 2.3 is multiple and is distributed on the base 2.1 at intervals along the circumference; the limit bolt 2.4 vertically penetrates the movable top cover 2.2, and the bottom of the limit bolt 2.4 is fixedly connected to the base 2.1 by a thread, thereby The top cap of the limit bolt 2.4 can limit the elevation of the movable top cover 2.2. A cover 2.9 is also provided on the movable top cover 2.2 to cover the limit bolt 2.4, and sufficient height is reserved in the cover 2.9 to provide a margin for the ejection of the limit bolt 2.4; the proximity detection switch 2.6 is embedded in the base 2.1 through the mounting block 2.8, and is used to detect whether the movable top cover 2.2 is pressed downward, that is, when the perfusion pipe 1 moves upward and the cover 2.9 contacts the top surface of the tunnel, the movable top cover 2.2 is pressed downward, thereby triggering the proximity detection switch 2.6; further, a wire groove is opened on the outer wall of the perfusion pipe 1, and the cable 2.10 of the proximity detection switch 2.6 is embedded in the wire groove and led downward along the wire groove to the control system, thereby sending the detection signal to the control system. Furthermore, a sealing ring installation groove is provided on the outer wall of the base 2.1, and the sealing ring 2.5 is installed in the sealing ring installation groove, and a pressure ring 2.11 is installed on the upper surface of the base 2.1 to fix the sealing ring 2.5 in the sealing ring installation groove; the sealing between the base 2.1 and the movable top cover 2.2 is ensured by the sealing ring 2.5 to prevent concrete from entering the top touch detection limit mechanism 2 during the pouring process into the tunnel arch and causing damage to it.

[0020] Embodiment 2

[0021] See attached Figure 2On the basis of the above embodiments, this embodiment introduces a vault pouring device capable of driving a pouring pipe to rise and fall, comprising a support frame 3, a linear drive actuator 4 and a slide 5. The support frame 3 is preferably a rectangular frame structure, comprising a bottom beam 3.1, two vertical beams 3.2 and a top beam 3.3. Vertical guide rails are arranged on the two vertical beams 3.2 of the support frame. The slide 5 is slidably mounted on the guide rails. The linear drive actuator 4 is vertically arranged between the top beam 3.3 and the slide 5 (that is, the top end of the linear drive actuator 4 is connected to the top beam 3.3, and the bottom end of the linear drive actuator 4 is connected to the slide 5). The linear drive actuator 4 can drive the slide 5 to slide vertically up and down along the guide rails. The pouring pipe 1 is vertically mounted on the slide 5. When working, the pouring pipe 1 is connected to the concrete infusion pipeline 6, and then The linear drive actuator 4 drives the slide 5 to move upward, and the slide 5 drives the injection pipe 1 thereon to move upward synchronously. When the top detection limit mechanism 2 detects that it contacts the tunnel top surface (the proximity detection switch 2.6 is triggered at this time), a signal is sent to the control system. At this time, the control system controls the linear drive actuator 4 to stop, so that the injection pipe 1 reaches and stops at the injection working position. At this position, the outlet of the injection pipe 1 is close to the tunnel top surface. In this way, during injection, concrete is discharged from the outlet of the injection pipe and falls downward. The height of the outlet is higher than the liquid level of the injected concrete, so the outlet will not be hindered, thereby increasing the injection speed and reducing the pumping pressure. Moreover, since the outlet of the injection pipe is close to the tunnel top surface, even if a cavity is formed on the top of the injection cavity due to the settlement of the concrete, new concrete can continue to be filled into the cavity.

[0022] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be done by other technical personnel in this field without expending creative labor falls within the protection scope of the present invention.

Claims

1. A tunnel vault pouring pipe top detection limit mechanism, characterized in that: It includes a base, a movable top cover, a spring, a limit bolt, a sealing ring and a proximity detection switch. The base is fixedly installed on the top of the perfusion tube, and the movable top cover is movably mounted on the base and can move up and down. The spring is vertically installed on the base, and the top of the spring contacts the movable top cover to provide an upward elastic force for the movable top cover. The limit bolt vertically penetrates the movable top cover, and the bottom of the limit bolt is fixedly connected to the base by a thread, and the top cap of the limit bolt limits the height of the movable top cover. A cover is also provided on the movable top cover to cover the limit bolt, and a height space is reserved in the cover to provide a margin for the ejection of the limit bolt. The proximity detection switch is embedded in the base to detect whether the movable top cover is pressed downward.

2. The top contact detection and limiting mechanism of the tunnel vault pouring pipe according to claim 1 is characterized in that: A wire groove is opened on the outer wall of the perfusion pipe, and the cable of the proximity detection switch of the top detection limit mechanism is embedded in the wire groove and led downward along the wire groove to the control system.

3. The top contact detection and limiting mechanism of the tunnel vault pouring pipe according to claim 1 is characterized in that: A sealing ring is arranged on the outer wall of the base of the top contact detection limit mechanism, and the sealing between the base and the movable top cover is ensured by the sealing ring.

4. The top contact detection and limiting mechanism of the tunnel vault pouring pipe according to claim 1 is characterized in that: A top surface is arranged on the top of the perfusion tube, a top contact detection limit mechanism is arranged on the top surface, and an outlet is arranged on the side wall of the top of the perfusion tube.

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