A temperature measuring wire plug protection device for concrete construction and a construction method

Abstract

This invention provides a protective device for a temperature measuring wire plug used in concrete construction, which protects the probe at temperature measuring points near the concrete surface during construction, ensuring effective measurement of the temperature field in large-volume concrete construction. It includes a temperature measuring wire placed within a large volume of concrete, comprising a plug exposed outside the concrete, a wire, and a probe inside the concrete. The protective device is located at the plug, and includes an external elastic airbag, an internal composite structure, and a vaporizing agent. The composite structure has a built-in cavity, and the plug is placed within the cavity. A certain gap exists between the elastic airbag and the composite structure, and the vaporizing agent is placed within this gap. The protective device also includes a latch, with the lower ends of the elastic airbag and the composite structure fixed to the latch. A reserved channel is provided in the middle of the latch for the plug to enter and exit. The latch is configured to release the plug.

Description

Technical Field

[0001] This invention belongs to the field of civil engineering technology, and relates to the measurement technology of large-volume concrete construction, and in particular to a protective device and construction method for a temperature measuring wire plug used in concrete construction. Background Technology

[0002] my country's "Standard for Construction of Mass Concrete" GB50496-2018 defines mass concrete as concrete with a minimum geometric dimension of not less than 1m, or concrete that is expected to develop harmful cracks due to temperature changes and shrinkage caused by the hydration of cementitious materials.

[0003] With the development of China's social economy, a large number of large and even super-large concrete building structures have emerged, including high-rise building foundations, large equipment foundations, and water conservancy dams. One of the main characteristics of these structures is their large volume; the smallest cross-section has a dimension greater than 1 meter in any direction. Due to the relatively small surface area coefficient of concrete, the heat release of cement hydration is concentrated, and the internal temperature rises relatively quickly. When the temperature difference between the inside and outside of the concrete is large, it can cause temperature cracks, affecting structural safety and normal use. Therefore, it is essential to analyze this fundamentally to ensure the quality of construction.

[0004] Monitoring and measuring the temperature of large-volume concrete is a crucial aspect of its construction. Generally, internal concrete temperature monitoring is performed using a temperature probe and a thermometer. During measurement, the probe plug is inserted into the thermometer to obtain the temperature reading. However, temperature probes are typically non-custom-made products, and given the increasing size of concrete structures in my country, various shortcomings inevitably arise. For example, the probe plug is close to the concrete surface, making it susceptible to damage during construction and curing. When pumped concrete is used, the concrete delivery pipe is very close to the plug, inevitably causing the probe to become contaminated with concrete. Due to the small size of the plug, even a small amount of concrete can completely envelop it, making it impossible to remove after the concrete hardens. Even with traditional plug-in bags, significant amounts of concrete can completely cover the plug after hardening, making it impossible to remove. Furthermore, during curing, the concrete surface is constantly sprayed with water, subjecting the plug to alternating wet and dry conditions, which can easily damage it. All of these factors interfere with the monitoring and measurement of the internal concrete temperature, negatively impacting the construction process.

[0005] Therefore, it is necessary to explore protective devices and methods for the plugs of temperature measuring wires near the concrete surface in order to achieve effective measurement of the temperature field during the construction of large-volume concrete. Summary of the Invention

[0006] The main technical problem to be solved by the present invention is to provide a protective device and construction method for a temperature measuring wire plug for concrete construction, so as to protect the plug of the temperature measuring point near the concrete surface during the construction of large volume concrete, and ensure the effective measurement of the temperature field of large volume concrete construction.

[0007] To solve the above-mentioned technical problems, the present invention provides a protective device for a temperature measuring wire plug used in concrete construction, including a temperature measuring wire placed in a large volume of concrete. The temperature measuring wire includes a plug exposed outside the large volume of concrete, a wire, and a probe inside the large volume of concrete. The protective device is provided at the plug of the temperature measuring wire. The protective device includes an external elastic airbag, an internal composite structure, and an aeration agent.

[0008] The composite structure has a built-in cavity, and the plug is placed inside the cavity; there is a certain gap between the elastic airbag and the composite structure, and the vaporizing agent is placed in the gap.

[0009] The protective device also includes a buckle, and the lower ends of the elastic airbag and the composite structure are fixed on the buckle; a reserved channel is provided in the middle of the buckle for the insertion and exit of the plug; the buckle is configured to release the plug.

[0010] In a preferred embodiment, the composite structure is a multi-layer composite structure, which consists of a heat insulation layer, a waterproof layer and a support layer arranged sequentially from the outside to the inside.

[0011] In a preferred embodiment, the buckle comprises a housing, a locking structure, and a spring; the locking structure is housed within the housing.

[0012] The clamping structure is in sliding frictional contact with the outer shell, and the bottom of the clamping structure is fixedly connected to the outer shell by a spring.

[0013] In a preferred embodiment, the lower end of the elastic airbag and composite structure is fixed to the outer shell.

[0014] In a preferred embodiment, a reserved channel is provided in the middle of the housing, and a reserved hole is provided on the clamping structure; the reserved hole is configured with a spring to be concentrically engaged or intersecting with the reserved channel.

[0015] In a preferred embodiment, the outer diameter of the reserved channel is greater than the maximum outer diameter of the plug; the outer diameter of the reserved hole is greater than the outer diameter of the reserved channel.

[0016] A concrete construction method, employing the aforementioned plug protection device;

[0017] The specific construction steps are as follows:

[0018] Step 1: Prepare the reinforcing cage according to the construction drawings, place the positioning rod inside the reinforcing cage and partially extend it out of the surface where a large volume of concrete needs to be poured; connect and fix the positioning rod to the adjacent reinforcing bars.

[0019] Step 2: Tie the temperature measuring wire to the positioning rod, place the probe inside the large volume of concrete to be poured at the temperature measurement position, and extend the plug of the temperature measuring wire toward the surface of the large volume of concrete to be poured.

[0020] Step 3: Press the release buckle to put the protective device on the probe. Shake the protective device to place the gasifying agent at the bottom of the elastic airbag and composite structure, and close to the surface where a large volume of concrete needs to be poured.

[0021] Step 4: Pour large volume concrete;

[0022] Step 5: Wait for the large volume concrete to solidify; during the solidification process, the large volume concrete releases a large amount of heat. The vaporizing agent is heated and vaporized, which acts on the external elastic airbag to slowly inflate and burst the uncured concrete adhering to the elastic airbag.

[0023] Step 6: After the large volume of concrete has completely solidified, remove the external elastic airbag and the solidified concrete that has been splashed onto it.

[0024] Step 7: Press the release buckle to remove the protective device on the probe and perform temperature measurement inside the large volume of concrete.

[0025] Step 8: After the measurement data is completed, press the release buckle to put the protective device on the probe to protect it.

[0026] Step 9: Enter the large-volume concrete curing stage. Sprinkle water continuously on the concrete surface. Repeat steps 7 and 8 while measuring the temperature until the concrete curing is completed.

[0027] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0028] This invention effectively improves the protective performance of the temperature measuring wire plug at temperature measuring points near the surface of large-volume concrete. During the pouring and solidification of large-volume concrete, the externally splashed flowing concrete is blocked by the external elastic airbag. Because the large-volume concrete below the plug releases a large amount of heat during solidification, and the plug is very close to the large-volume concrete, the heat causes the vaporizing agent to gradually vaporize, and the external elastic airbag to gradually expand. Ultimately, this separates the clumps of freshly poured, splashed concrete, preventing them from forming a complete envelope, facilitating subsequent processing. Simultaneously, after the large-volume concrete solidifies, there is a curing period of several days, during which continuous watering is required. The snap-fit ​​design, combined with the internal composite structure, allows the plug to be removed during measurement and conveniently reattached to the plug during non-measurement times, providing protection for the plug. Attached Figure Description

[0029] Figure 1 This is a preferred embodiment of the present invention, showing the overall layout and temperature measuring line structure.

[0030] Figure 2 This is a structural diagram of the protection device in a preferred embodiment of the present invention;

[0031] Figure 3 This is a structural diagram of the protective device during the concrete construction period in a preferred embodiment of the present invention;

[0032] Figure 4 This is a structural diagram of the protective device in the concrete curing period in a preferred embodiment of the present invention;

[0033] Figure 5 This is a structural diagram of the protective device during the concrete curing period in a preferred embodiment of the present invention;

[0034] Figure 6 This is a planar cross-sectional view of the buckle in normal state in a preferred embodiment of the present invention;

[0035] Figure 7 This is a planar cross-sectional view of the protective device in the pressed state in a preferred embodiment of the present invention;

[0036] Figure 8 This is a plan view of the protective device in a preferred embodiment of the present invention.

[0037] Explanation of reference numerals in the attached drawings: Ⅰ. Mass concrete; Ⅱ. Reinforcing cage; Ⅲ. Positioning rod; Ⅳ. Temperature measuring wire; 1. Temperature measuring wire plug; 2. Temperature measuring wire conductor; 3. Temperature measuring wire probe; 4. External elastic airbag; 5. Internal composite structure; 51. Insulation layer; 52. Waterproof layer; 53. Supporting layer; 6. Gasifying agent; 7. Buckle; 71. Outer shell; 72. Clamping structure; 73. Reserved channel; 74. Spring; 75. Reserved hole; 8. Splashed freshly poured concrete; 9. Splashed solidified concrete. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0041] refer to Figures 1-8 This embodiment provides a protective device for a temperature measuring wire plug used in concrete construction. A protective device for a temperature measuring wire plug near the concrete surface during the construction of large-volume concrete includes a large-volume concrete I, a reinforcing cage II, a positioning rod III, a temperature measuring wire IV, a temperature measuring wire plug 1, a temperature measuring wire conductor 2, a temperature measuring wire probe 3, an external elastic airbag 4, an internal composite structure 5, a vaporizing agent 6 and a buckle 7, freshly poured concrete splashed out 8, and solidified concrete splashed out 9.

[0042] The large-volume concrete I and the reinforcing cage II are prepared according to the construction drawings. The positioning rod III is placed inside the reinforcing cage II and extends out of the surface of the large-volume concrete I to be poured. The positioning rod III is fixed to the adjacent reinforcing bars. The temperature measuring wire IV is tied to the positioning rod III, with the temperature measuring wire probe 3 placed at the temperature to be measured position inside the large-volume concrete I, and the temperature measuring wire plug 1 exposed outside the large-volume concrete I.

[0043] The temperature measuring line plug 1 is wrapped by an internal composite structure 5. The outer side of the internal composite structure 5 is an external elastic airbag 4. There is a certain gap between the external elastic airbag 4 and the internal composite structure 5, and a vaporizing agent 6 is placed in the gap between the external elastic airbag 4 and the internal composite structure 5.

[0044] The internal composite structure 5 is a multi-layered composite structure, consisting of a heat insulation layer 51, a waterproof layer 52, and a support layer 53 from the outside to the inside. The heat insulation layer 51 is used to isolate the large amount of heat generated during the curing process of large-volume concrete. The waterproof layer 52 is used to waterproof the concrete when it is continuously sprayed with water during the curing process. The support layer 53 provides support when the external elastic airbag expands. Due to the presence of the support layer, the internal composite structure does not deform significantly when the external elastic airbag expands.

[0045] The lower ends of the external elastic airbag 4 and the internal composite structure 5 are both fixed to the buckle 7. The buckle 7 consists of a shell 71, a clamping structure 72, and a spring 74. The clamping structure 72 is placed inside the shell 71, and the clamping structure 72 and the shell 71 are in sliding friction contact. The bottom of the clamping structure 72 is fixedly connected to the shell 71 by the spring 74.

[0046] The external elastic airbag 4 and the lower end of the internal composite structure 5 are fixed to the outer shell 71 of the buckle 7. The outer shell 71 has a reserved channel 73 in the middle, the outer diameter of which is slightly larger than the maximum outer diameter of the temperature measuring wire plug 1. The clamping structure 72 has a reserved hole 75 in the middle, the outer diameter of which is slightly larger than the outer diameter of the reserved channel 73. The reserved hole 75 is constructed with a spring 74 to concentrically or intersectingly engage with the reserved channel 73, forming a releasable structure for the temperature measuring wire plug 1.

[0047] In this embodiment, when using the protective device, the plug protection device is fitted onto the temperature measuring wire plug 1 with its buckle 7, and then a large volume of concrete is poured. After the concrete solidifies, the external elastic airbag and the solidified concrete splashed from above are removed. The remaining composite structure 5 is used as the plug protection device during the curing period of the large volume concrete. The protection device is removed when measuring the temperature and installed at other times.

[0048] This embodiment also provides a concrete construction method that utilizes this plug protection device.

[0049] The specific construction and fabrication steps are as follows:

[0050] Step 1: Prepare the reinforcing cage II according to the construction drawings, place the positioning rod III inside the reinforcing cage II and partially extend it out of the surface where a large volume of concrete needs to be poured; connect and fix the positioning rod III to the adjacent reinforcing bars.

[0051] Step 2: Tie the temperature measuring wire IV to the positioning rod III, place the probe inside the large volume concrete to be poured at the temperature measurement position, and extend the temperature measuring wire plug 1 towards the surface of the large volume concrete to be poured.

[0052] Step 3: Press the buckle 7 to release the locking structure 72, put the protective device on the temperature measuring line plug 1, shake the protective device to place the vaporizing agent 6 at the bottom of the outer elastic airbag 4 and the inner composite structure 5, and near the surface where a large volume of concrete needs to be poured.

[0053] Step 4: Pour large volume concrete (see reference) Figure 3 (The structure of freshly poured concrete 8 sputtered and adhering to the external elastic airbag 4);

[0054] Step 5: Wait for the large-volume concrete to solidify; during the solidification process, the large-volume concrete will release a large amount of heat due to the heat of hydration. At this time, the vaporizing agent 6 is heated and vaporized, which acts on the external elastic airbag 4 to slowly inflate and burst the uncured concrete adhering to the external elastic airbag 4 (see reference). Figure 4 (The structure of solidified concrete 9 sputtered out and attached to the external elastic airbag 4);

[0055] Step 6: After the large volume of concrete has completely solidified, remove the external elastic airbag 4 and the solidified concrete 9 that has been splashed onto it.

[0056] Step 7: Press the buckle 7 to release the locking structure 72, remove the protective device on the temperature measuring wire plug 1, and perform temperature measurement on the surface of a large volume of concrete.

[0057] Step 8: After the measurement data is completed, press the buckle 7 to release the locking structure 72, and put the protective device on the temperature measuring wire plug 1 to protect the temperature measuring wire plug 1.

[0058] Step 9: Enter the curing stage of large-volume concrete. Sprinkle water continuously on the surface of the large-volume concrete. Repeat steps 7 and 8 while measuring the temperature until the curing of the concrete is completed.

[0059] The above description is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention by those skilled in the art within the scope of the technology disclosed in the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A protection device for a temperature measuring cable plug for concrete construction, comprising a temperature measuring cable placed in mass concrete, the temperature measuring cable comprising a plug exposed outside the mass concrete, a conductor wire and a probe placed inside the mass concrete; characterized in that: The temperature measuring line is provided with the protection device at the plug, and the protection device comprises an external elastic air bag, an internal composite structure and a gasifying agent; The composite structure is internally provided with a cavity, and the plug is arranged in the cavity; the elastic air bag and the composite structure are provided with a gap, and the gasifying agent is arranged in the gap; The protection device further comprises a buckle, and the lower ends of the elastic air bag and the composite structure are fixed on the buckle; the buckle is provided with a reserved channel in the middle, which is used for the plug to enter and exit; and the buckle is configured to release the plug.

2. The temperature measuring cable plug protection device for concrete construction of claim 1, wherein: The composite structure is a multilayer composite structure, which is sequentially provided with a heat insulation layer, a waterproof layer and a support layer from outside to inside.

3. The temperature measuring cable plug protection device for concrete construction of claim 1, wherein: The buckle is composed of a shell, a clamping structure and a spring; and the clamping structure is arranged in the shell; The clamping structure is in sliding frictional contact with the shell, and the bottom of the clamping structure is fixedly connected with the shell through the spring.

4. The temperature measuring cable plug protection device for concrete construction of claim 3, wherein: The lower ends of the elastic air bag and the composite structure are fixed on the shell.

5. The temperature measuring cable plug protection device for concrete construction of claim 3, wherein: A reserved channel is arranged in the middle of the shell, and a reserved hole is arranged on the clamping structure; the reserved hole is configured to be concentrically matched or intersected matched with the reserved channel through the spring.

6. The temperature measuring cable plug protection device for concrete construction of claim 5, wherein: The outer diameter of the reserved channel is greater than the maximum outer diameter of the plug; and the outer diameter of the reserved hole is greater than the outer diameter of the reserved channel.

7. A method of concrete construction characterised by: The protection device of the plug of any one of claims 1-6 is applied; The specific construction steps are as follows: Step 1, according to the construction drawing, prepare the binding steel cage, place the positioning rod in the steel cage and partially extend out of the surface of the mass concrete to be poured; the positioning rod is fixedly connected with the adjacent steel bars; Step 2, bind the temperature measuring line on the positioning rod, place the probe in the internal temperature measuring position of the mass concrete to be poured, and extend the plug of the temperature measuring line out of the surface of the mass concrete to be poured; Step 3, press the release buckle, wrap the protection device on the plug, shake the protection device to place the gasifying agent at the lowermost end of the elastic air bag and the composite structure, and adjacent to the surface of the mass concrete to be poured; Step 4, pour the mass concrete; Step 5, wait for the concrete to solidify; the mass concrete releases a large amount of heat during the solidification process, the gasifying agent is heated and gasified to act on the external elastic air bag to slowly inflate and crack the elastic air bag and the splashed un-solidified concrete adhered to the elastic air bag; Step 6, after the concrete is completely solidified, remove the external elastic air bag and the splashed solidified concrete adhered thereto; Step 7, press the release buckle to remove the protection device on the plug, and measure the temperature inside the mass concrete; Step 8, after the measurement data is completed, press the release buckle to wrap the protection device on the plug to protect the plug; Step 9, enter the concrete curing stage, continuously sprinkle water on the surface of the mass concrete, and repeat steps 7 and 8 when measuring the temperature until the curing of the mass concrete is completed.

Images