CN219391198U - Anti-drop sensor for secondary lining concrete pouring vault - Google Patents

Abstract

The utility model provides a secondary lining concrete pouring vault anti-void sensor which comprises a cavity, wherein one side of the cavity is sealed by a metal diaphragm, a circuit board is arranged in the cavity, the circuit board is provided with a temperature sensor and a pressure sensor in a combined mode, a cable penetrates out of the cavity, an oil seal plug is arranged at one end, far away from the cable, of the cavity, and the cavity is filled by an isolation medium.

Description

Anti-drop sensor for secondary lining concrete pouring vault

Technical Field

The utility model relates to the technical field of sensor detection, in particular to a double-lining concrete pouring vault anti-drop sensor of an oil-filled structure.

Background

When the secondary lining concrete of the tunnel is poured, the arch crown part of the secondary lining of the tunnel cannot be closely attached to the primary support due to the fact that the waterproof layer is too tightly paved and hung, and the void exists between the primary support and the secondary lining. The main reason is that the concrete after pouring can shrink in volume after solidification, and the concrete moves downwards under the influence of gravity, so that a cavity is formed at the top, and secondary grouting is needed.

The current anti-drop device includes two types: hydraulic communication and pressure contact communication. The hydraulic communication type anti-falling device utilizes the conductivity of water in concrete, when the concrete is poured to the height of the contact terminal, the contact terminal is connected with the concrete to form a loop, the relay works, and the indicator lamp is lightened. The pressure contact communication type anti-falling device utilizes the poured concrete to generate pressure to the pressure sensor embedded with the vault, copper foils of the pressure sensor are communicated to form a loop, the relay works, and the indicator lamp is lightened.

However, due to splashing of concrete slurry, false triggering may be caused, whether concrete is poured fully or not can be comprehensively judged by combining the concrete consumption, the RPC pipe slurry outlet condition and the like, pouring fully can be detected, and void in the concrete solidification process cannot be detected.

Disclosure of Invention

The utility model provides a two lining concrete pouring vault anti-drop sensor, which aims at: and detecting the secondary grouting process in real time through a sensor.

The embodiment of the utility model is realized by the following technical scheme:

the utility model provides a vault anti-void sensor is pour to second lining concrete, includes the cavity, one side of cavity is sealed through metal diaphragm, is provided with the circuit board in the cavity inside, the circuit board has temperature sensor and pressure sensor, be connected with the cable on the circuit board combination and wear out the cavity, it is provided with the oil seal to keep away from cable one end on the cavity, the cavity is inside to be filled through isolated medium.

Preferably, the insulating medium is silicone oil.

Preferably, the metal membrane is corrugated.

Preferably, the cavity is cylindrical, and the outer diameters of the cavity and the metal diaphragm are 60mm.

Preferably, the thickness of the metal film sheet is 0.2mm.

Preferably, the temperature sensor is a platinum resistance temperature sensor, and the pressure sensor is a silicon piezoresistive pressure sensor.

Preferably, the joint of the cable and the cavity is sealed by using an adhesive.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

the sensor is wrapped by the metal diaphragm, so that the sensor is prevented from being extruded and damaged with concrete in the detection process, and the sensor cannot be splashed by mud to cause misjudgment after being wrapped, pressure detection is carried out through the metal diaphragm and an isolated medium in the detection process, and the pressure data is transmitted through a cable to finish real-time detection.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Icon: 1-oil seal, 2-cavity, 3-metal diaphragm, 4-silicone oil, 5-circuit board, 6-cable.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Example 1

The utility model provides a vault anticreep air sensor is pour to second lining concrete, includes tubular cavity 2, one side of cavity 2 is connected through corrugated metal diaphragm 3, forms the enclosure with cavity 2, be provided with circuit board 5 in the cavity 2, temperature sensor and pressure sensor have on the circuit board 5, temperature sensor is platinum resistance temperature sensor, pressure sensor is silicon piezoresistance pressure sensor. One end of the circuit board 5 is connected with a cable 6, and the cable 6 penetrates through one end of the cavity 2 to be connected with the outside and is used for power supply and pressure and temperature signal transmission of the circuit board 5.

The cable 6 one end is provided with the oil filling hole in cavity 2, has the isolated medium to fill through the oil filling hole with cavity 2 inside, and isolated medium selects for use silicone oil 4, and silicone oil 4 is non-corrosive and insulating good, seals through oil seal 1 after filling, makes inside and external separation.

The utility model is mainly used for monitoring the pouring process when the secondary lining concrete of the tunnel is poured, the utility model is arranged on a vault, the pressure of the concrete on the vault is measured, in the detection process, the thickness of the metal diaphragm 3 is designed to be about 0.2mm and thinner than the cavity 2, so that the metal diaphragm 3 is easy to deform, the metal diaphragm 3 deforms to different degrees according to different pressures in extrusion, and the extrusion medium is used for transmitting the pressure to the pressure sensor after deformation. Monitoring in several stages in the secondary lining concrete pouring process, wherein firstly, the primary pouring of the concrete is used for judging whether the grouting pressure reaches the standard or not during the concrete pouring; secondly, shrinkage can be generated in the initial setting process of the concrete which is poured for the first time, the concrete moves downwards due to the influence of gravity, a cavity can be formed at the top, secondary grouting is needed, whether the pressure of the secondary grouting is within a designed threshold value or not is judged through an output voltage signal of a sensor in the secondary grouting process, the pouring quality of the concrete is ensured, the cavity is easily generated when the pressure is too small, and cracks are formed when the pressure is too high due to too large extrusion of the initial setting concrete; thirdly, after the concrete is completely solidified, whether the top is empty or not can be judged through the pressure value of the sensor, so that the quality of the poured concrete can be judged conveniently. Fourth, the temperature condition of each concrete stage in the secondary lining concrete pouring process can be monitored through a temperature sensor in the sensor.

The metal diaphragm 3 is corrugated, stainless steel is selected as a material, and the corrugated design is used for reducing the volume change caused by thermal expansion of the silicone oil 4 filled in the stiffness sensor in the axial direction of the diaphragm at high and low temperatures. The thickness of the corrugated diaphragm is about 0.2mm, and the diaphragm extrusion damage caused by concrete can be effectively prevented.

The multicore cable 6 of the sensor can be connected with a data acquisition system on the concrete pouring trolley, and the data acquisition system can calculate the pressure value sensed by the sensor through the monitored voltage signal. And a temperature sensor is arranged in the sensor, and the data acquisition system can also acquire temperature information of the sensor in real time. The temperature information can be used for monitoring the temperature change condition of the concrete in the solidification process, and then the solidification process is judged by utilizing the temperature information. The pressure sensor errors caused by the volume change of the thermal expansion of the silicone oil 4 at high and low temperatures can be compensated by the temperature sensor data.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. A two lining concrete pouring vault anti-disengaging sensor which characterized in that: including cavity (2), one side of cavity (2) is sealed through metal diaphragm (3), is provided with circuit board (5) inside cavity (2), circuit board (5) combination have temperature sensor and pressure sensor, be connected with cable (6) on circuit board (5) and wear out cavity (2), keep away from cable (6) one end on cavity (2) and be provided with oil seal stopper (1), cavity (2) are inside to be filled through isolated medium.

2. The secondary lining concrete pouring vault anti-drop sensor according to claim 1, wherein: the isolating medium is silicone oil (4).

3. The secondary lining concrete pouring vault anti-drop sensor according to claim 1, wherein: the metal membrane (3) is corrugated.

4. The secondary lining concrete pouring vault anti-drop sensor according to claim 3, wherein: the cavity (2) is cylindrical, and the outer diameters of the cavity (2) and the metal diaphragm (3) are 60mm.

5. The secondary lining concrete pouring vault anti-drop sensor according to claim 3, wherein: the thickness of the metal membrane (3) is 0.2mm.

6. The secondary lining concrete pouring vault anti-drop sensor according to claim 1, wherein: the temperature sensor is a platinum resistance temperature sensor, and the pressure sensor is a silicon piezoresistive pressure sensor.

7. The secondary lining concrete pouring vault anti-drop sensor according to claim 1, wherein: the joint of the cable (6) and the cavity (2) is sealed by adopting an adhesive.