A concrete carbonation test device

Abstract

This utility model relates to the field of concrete carbonation testing technology, specifically a concrete carbonation testing device, including a test cabinet body. A cylinder liner is fixedly connected inside the test cabinet body. Four pistons are slidably connected to the inner wall of the cylinder liner. A crankshaft is installed on the inner wall of the test cabinet body below the cylinder liner. Four connecting rods are installed on the outer wall of the crankshaft. The tops of the connecting rods are hinged to the pistons. A rod body is fixedly connected to the top of the pistons. This utility model uses a motor-driven crankshaft-connecting rod-piston mechanical transmission system to cause the specimen to reciprocate, actively breaking the gas boundary layer on the concrete surface and increasing the carbonation reaction rate by 40%-60%. Compared to traditional static testing, the test cycle for the same carbonation depth can be shortened by more than one-third. The reciprocating motion of the specimen ensures continuous contact between the concrete surface and fresh carbon dioxide gas, avoiding reaction stagnation caused by localized concentration reduction and achieving a uniform increase in carbonation speed.

Description

Technical Field

[0001] This utility model relates to the field of concrete carbonation testing technology, specifically a concrete carbonation testing device. Background Technology

[0002] In the field of concrete carbonation performance testing, traditional carbonation testing devices have significant technical defects: First, the specimens are usually fixed in the test chamber, which cannot achieve dynamic displacement, resulting in low contact efficiency between the concrete surface and carbon dioxide gas. The carbonation reaction can only take place at the static interface, and the carbonation rate is more than 30% slower than under actual working conditions. Second, statically placed specimens are prone to forming local carbon dioxide concentration gradients. The degree of carbonation is higher near the gas source and insufficient far from the gas source. The carbonation uniformity deviation can reach ±20%, which seriously affects the reliability of the test data. Third, existing devices lack mechanical drive structures, and gas circulation mainly relies on natural diffusion, which cannot actively promote the convection exchange between carbon dioxide and the concrete surface. The problem of carbonation uniformity is more prominent, especially for large-sized specimens or when multiple specimens are tested at the same time. Therefore, a concrete carbonation testing device is proposed. Utility Model Content

[0003] In view of this, the present invention provides a concrete carbonation testing device to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial option.

[0004] The technical solution of this utility model is implemented as follows: A concrete carbonation test device includes a test cabinet body, a cylinder liner is fixedly connected inside the test cabinet body, four pistons are slidably connected to the inner side wall of the cylinder liner, a crankshaft is installed on the inner side wall of the test cabinet body below the cylinder liner, four connecting rods are installed on the outer side wall of the crankshaft, the top of the connecting rods is hinged to the piston, a rod body is fixedly connected to the top of the piston, and a bracket is installed on the top of the rod body.

[0005] More preferably, a motor is installed on one side of the main body of the test cabinet, and the output end of the motor is fixedly connected to one end of the crankshaft.

[0006] More preferably, the front surface of the test cabinet body is hinged with a cabinet door.

[0007] More preferably, a connector is connected to one side of the main body of the test cabinet.

[0008] The present invention has the following advantages due to the adoption of the above technical solution:

[0009] I. This utility model utilizes a motor-driven crankshaft-connecting rod-piston mechanical transmission system to induce reciprocating motion in the specimen, actively breaking the gas boundary layer on the concrete surface and increasing the carbonation reaction rate by 40%-60%. Compared to traditional static testing, the test cycle for the same carbonation depth can be shortened by more than one-third. The reciprocating motion of the specimen ensures continuous contact between the concrete surface and fresh carbon dioxide gas, preventing reaction stagnation caused by localized concentration reduction and achieving a uniform increase in carbonation speed.

[0010] 2. The piston of this utility model drives the vertical reciprocating motion of the specimen, which, together with the gas circulation in the chamber, reduces the distribution deviation of carbon dioxide on the surface of the specimen to within ±5%, significantly improving the carbonization uniformity. The reciprocating motion of the specimen creates a mechanically disturbed airflow in the chamber, which assists in the circulation of carbon dioxide gas and reduces the energy consumption of the fan in traditional devices.

[0011] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a structural diagram of the present invention;

[0014] Figure 2 This is another structural view of the present invention;

[0015] Figure 3 This is a partial structural diagram of the present invention.

[0016] Reference numerals in the attached drawings: 1. Main body of the test cabinet; 2. Cylinder liner; 3. Crankshaft; 4. Motor; 5. Connecting rod; 6. Piston; 7. Rod body; 8. Bracket; 9. Cabinet door; 10. Connector. Detailed Implementation

[0017] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figure 1-3 As shown, this utility model embodiment provides a concrete carbonation test device, including a test cabinet body 1. A cylinder liner 2 is fixedly connected inside the test cabinet body 1. Four pistons 6 are slidably connected to the inner side wall of the cylinder liner 2. A crankshaft 3 is installed on the inner side wall of the test cabinet body 1 below the cylinder liner 2. Four connecting rods 5 are installed on the outer side wall of the crankshaft 3. The top of the connecting rods 5 is hinged to the pistons 6. A rod body 7 is fixedly connected to the top of the pistons 6. A bracket 8 is installed on the top of the rod body 7.

[0020] In one embodiment, a motor 4 is installed on one side of the test cabinet body 1, and the output end of the motor 4 is fixedly connected to one end of the crankshaft 3; through the setting of the motor 4, the motor 4 drives the crankshaft 3 to rotate.

[0021] In one embodiment, a cabinet door 9 is hinged to the front surface of the test cabinet body 1; the test cabinet body 1 is closed by the cabinet door 9.

[0022] In one embodiment, a connector 10 is connected to one side of the test cabinet body 1; the connector 10 is used to connect a carbon dioxide gas delivery pipeline.

[0023] In operation, this invention works as follows: The cabinet door 9 is opened, and the concrete specimen is fixed onto the bearing surface of the support 8. A carbon dioxide gas delivery pipeline is connected via connector 10. After checking the airtightness, carbon dioxide is introduced into the main body 1 of the test cabinet until the concentration reaches the set value. The motor 4 is then turned on, and its output drives the crankshaft 3 to rotate. The connecting rod 5 converts the crankshaft's circular motion into the reciprocating linear motion of the piston 6 within the cylinder liner 2. The up-and-down movement of the piston 6 is transmitted to the support 8 via the rod 7, causing the support to drive the concrete specimen to move vertically back and forth in a regular pattern. Driven by the support 8, the specimen reciprocates at a frequency of 0.5-2Hz, continuously maintaining full contact with the carbon dioxide gas inside the chamber. During the test, the temperature, humidity, and carbon dioxide concentration inside the chamber are monitored by an external control system. Gas is replenished and environmental parameters are adjusted as needed to ensure the carbonation reaction proceeds under standard conditions. After the predetermined test cycle is reached, the motor 4 is turned off, the mechanical drive is stopped, the cabinet door 9 is opened, the specimen is removed, and the carbonation depth is detected using the phenolphthalein indicator method, completing the data acquisition.

[0024] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A concrete carbonation test device, characterized by: The test cabinet includes a main body (1), a cylinder liner (2) is fixedly connected inside the main body (1), four pistons (6) are slidably connected to the inner side wall of the cylinder liner (2), a crankshaft (3) is installed on the inner side wall of the main body (1) below the cylinder liner (2), four connecting rods (5) are installed on the outer side wall of the crankshaft (3), the top of the connecting rods (5) is hinged to the pistons (6), a rod body (7) is fixedly connected to the top of the pistons (6), and a bracket (8) is installed on the top of the rod body (7).

2. A concrete carbonation test device according to claim 1, characterised in that: A motor (4) is installed on one side of the main body (1) of the test cabinet, and the output end of the motor (4) is fixedly connected to one end of the crankshaft (3).

3. The concrete carbonation test device of claim 1, wherein: The front surface of the test cabinet body (1) is hinged with a cabinet door (9).

4. The concrete carbonation test device of claim 1, wherein: The test cabinet body (1) has a connector (10) connected to one side.

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