Temperature sensor for concrete-filled steel tube arch bridge

Abstract

The utility model discloses a temperature sensor for a concrete-filled steel tube arch bridge. The temperature sensor comprises a protective shell and a sensor body packaged in the protective shell, one end of the protective shell is provided with an opening part, and the sensor probe is installed on the side, facing the opening part, of the sensor body and located in the opening part. According to the utility model, the sensor can be protected by arranging the protective shell, so that the poured concrete can only enter from the opening end of the opening part to be in contact with the sensor probe, and the extrusion of the concrete to the sensor body is avoided; therefore, the purposes of protecting the sensor and improving the survival rate of the sensor are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steel pipe concrete arch bridge temperature sensor. BACKGROUND

[0002] With the development of economy, the continuous expansion of highway and railway makes the travel condition of people increasingly convenient. In recent years, a large number of high-grade highways and railways are built, and cement concrete components occupy an important position in bridge construction. In construction, temperature sensors play an important role in the process of cement hardening.

[0003] At present, the steel pipe concrete arch bridge adopts arch bottom to arch top pouring, the larger the arch bridge span is, the higher the arch top lift is, and the greater the pumping pressure is, so that the arch top section sensor is subjected to great pressure and impact force, which greatly reduces the survival rate of the sensor.

[0004] Therefore, in view of the existing problem of low sensor survival rate, it is an urgent technical problem to develop a sensor that can improve the survival rate for real bridge test. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims at overcoming the defects in the prior art and solving the problem of low survival rate of the existing arch top sensor.

[0006] The steel pipe concrete arch bridge temperature sensor of the utility model, including protection shell and sensor body encapsulated in the protection shell, one end of the protection shell is provided with an opening part, a sensor probe is installed on the side of the sensor body facing the opening part and located in the opening part.

[0007] Further, the opening part of the protection shell is an outwardly expanding "umbrella" shaped opening part.

[0008] Further, a transition section is connected between the "umbrella" shaped opening part and one end of the protection shell, the transition section is smoothly connected with the "umbrella" shaped opening part and the protection shell respectively, and the inclination angle of the transition section is greater than that of the "umbrella" shaped opening part.

[0009] Further, the protection shell includes an inner protective sleeve, an outer protective sleeve and an anti-static heat insulation layer arranged between the inner protective sleeve and the outer protective sleeve.

[0010] Further, the inner surface of the opening part is coated with an epoxy resin layer.

[0011] Further, a refrigerator is arranged between the tail of the sensor body and the protection shell.

[0012] Further, the refrigerator includes a heat-conducting shell and a phase change material filled in the heat-conducting shell.

[0013] Further, the heat-conducting shell is a heat-conducting insulating rubber shell or a heat-conducting metal shell.

[0014] Further, the inner protective sleeve is a copper pipe, the outer protective sleeve is a rigid armor sleeve, and the anti-static heat insulation layer is an epoxy resin layer.

[0015] Further, the sensor body sends the temperature signal detected by the sensor probe to the wireless data collector through the wireless transmission unit.

[0016] The utility model discloses a beneficial effect is: through setting up the protection shell can protect the sensor, make the poured concrete only can enter the opening end of the opening portion and contact the sensor probe, and avoid the extrusion of concrete to the sensor body, thereby realizing the protection sensor, and the purpose of improving the survival rate of sensor. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, in these drawings, the same reference numerals are used to represent the same or similar parts, the schematic embodiment of the present application and its description are used to explain the present application, and do not constitute improper limitation to the present application.

[0018] Figure 1 It is the structural schematic diagram of an embodiment of the utility model.

[0019] Among them: 1, sensor body;11, sensor probe;2, inner protective sleeve;3, outer protective sleeve;4, anti-static layer;5, transition section;6, " umbrella " shaped opening portion;7, refrigerator. DETAILED DESCRIPTION

[0020] As Figure 1 The steel pipe concrete arch bridge temperature sensor shown in the figure, including the protection shell and the sensor body 1 encapsulated in the protection shell;The opening portion is arranged at one end of the protection shell, and the sensor probe 11 is installed on the side of the sensor body 1 facing the opening portion and located in the opening portion;Through setting up the protection shell can protect the sensor, make the poured concrete only can enter the opening end of the opening portion and contact the sensor probe 11, and avoid the extrusion of concrete to the sensor body 1, thereby realizing the protection sensor, and the purpose of improving the survival rate of sensor.

[0021] According to one embodiment of the present application, the opening portion of the protection shell is an outwardly expanding " umbrella " shaped opening portion 6;Through the opening portion with " umbrella " structure, more concrete can be conveniently made to enter the inside of the opening portion and directly contact the sensor probe 11 located therein, the hysteresis effect is reduced, and the test data accuracy is improved.

[0022] According to one embodiment of the present application, a transition section 5 is connected between the "umbrella" shaped opening section 6 and one end of the protective shell, the transition section 5 is smoothly connected with the "umbrella" shaped opening section 6 and the protective shell respectively, and the inclination angle of the transition section 5 is greater than the inclination angle of the "umbrella" shaped opening section 6. By setting the transition section 5 and smoothly connecting the transition section 5 with the "umbrella" shaped opening section 6 and the protective shell respectively, the stress concentration effect at the connection between the opening section and the protective shell can be reduced.

[0023] According to one embodiment of the present application, the protective shell comprises an inner protective sleeve 2, an outer protective sleeve 3, and an anti-static heat insulation layer arranged between the inner protective sleeve 2 and the outer protective sleeve 3.

[0024] According to one embodiment of the present application, the inner protective sleeve 2 is a copper pipe, the outer protective sleeve 3 is a rigid armor sleeve, and the anti-static heat insulation layer is an epoxy resin layer. The armor sleeve is arranged at the outermost layer and is used to resist external impact force and prevent the protective sleeve from being deformed under the impact force of the concrete. The copper pipe has good corrosion resistance and can protect the sensor from being corroded. The epoxy resin layer has good anti-static and heat insulation effects.

[0025] According to one embodiment of the present application, the inner surface of the opening section is coated with an epoxy resin layer. The epoxy resin layer has the effects of heat insulation, high temperature resistance, and corrosion resistance, and can prevent the protective shell from transmitting the temperature of the sensor body 1 itself to the surrounding concrete, thereby affecting the detection results of the concrete.

[0026] According to one embodiment of the present application, a refrigerator 7 is arranged between the tail of the sensor body 1 and the protective shell. The heat of the sensor body 1 can be cooled to ensure the normal operation of the sensor.

[0027] According to one embodiment of the present application, the refrigerator 7 comprises a heat-conducting shell and a phase change material filled in the heat-conducting shell. The heat of the sensor body 1 is transmitted to the heat-conducting shell of the refrigerator 7 through the sensor body 1 and the inner protective sleeve 2, and then is transmitted to the phase change material through the heat-conducting shell, so that the heat is absorbed by the phase change material to achieve cooling.

[0028] According to one embodiment of the present application, the heat-conducting shell is a heat-conducting insulating rubber shell or a heat-conducting metal shell. The heat-conducting shell is conformally matched with the space between the tail of the sensor body 1 and the protective shell, and a wire hole is arranged in the middle of the heat-conducting shell for facilitating the passing of wires.

[0029] According to one embodiment of the present application, the sensor body 1 transmits the temperature signal detected by the sensor probe 11 to a wireless data collector through a wireless transmission unit. The wireless data transmission mode is adopted to transmit the collected temperature signal to the wireless data collector, which is convenient for construction, and the data acquisition and processing are not limited to the engineering location, thereby improving the accuracy of test data.

[0030] According to one embodiment of the present application, in addition to protecting the sensor body 1, the diameter of the sensor probe 11 is designed as:

[0031]

[0032] Wherein m is the mass of the first batch of pouring section; g is the acceleration of gravity; h is the vertical height from the arch foot to the arch top; s is the arch axis length from the arch foot to the arch top; alpha is the angle between the arch axis of the arch foot section and the horizontal line; a x is the angle between the arch axis and the horizontal line when the first batch of pouring section reaches the (xi, yi) position; l is the horizontal height from the arch foot to the arch top; [sigma] is the allowable stress.

[0033] The embodiment sets the diameter of the sensor probe 11 according to the construction scene, so that the front of the sensor probe 11 has a stress area that can meet the compression requirement, to prevent the sensor from being crushed, and to achieve the purpose of improving the survival rate of the sensor, thereby ensuring the smooth progress of the bridge test.

[0034] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A temperature sensor for a concrete filled steel tube arch bridge, characterized by, The protective shell and a sensor body enclosed in the protective shell; one end of the protective shell is provided with an opening part, and a sensor probe is installed on the side of the sensor body facing the opening part and located in the opening part.

2. The concrete-filled steel tubular arch bridge temperature sensor according to claim 1, wherein, The opening part of the protective shell is an outwardly expanding "umbrella" shaped opening part.

3. The concrete-filled steel tubular arch bridge temperature sensor of claim 2, wherein, A transition section is connected between the "umbrella" shaped opening part and the one end of the protective shell, the transition section is smoothly connected with the "umbrella" shaped opening part and the protective shell respectively, and the inclination angle of the transition section is greater than that of the "umbrella" shaped opening part.

4. The concrete-filled steel tubular arch bridge temperature sensor of claim 1, wherein, The protective shell comprises an inner protective sleeve, an outer protective sleeve and an anti-static heat insulation layer arranged between the inner protective sleeve and the outer protective sleeve.

5. The concrete-filled steel tubular arch bridge temperature sensor of claim 4, wherein, The inner protective sleeve is a copper pipe, the outer protective sleeve is a rigid armor sleeve, and the anti-static heat insulation layer is an epoxy resin layer.

6. The concrete-filled steel tubular arch bridge temperature sensor of claim 5, wherein, The inner surface of the opening part is coated with an epoxy resin layer.

7. The concrete-filled steel tubular arch bridge temperature sensor of claim 1, wherein, The sensor body sends the temperature signal detected by the sensor probe to a wireless data collector through a wireless transmission unit.

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