A building material hardness detection device

Abstract

The utility model relates to building material performance detection technical field, specifically disclose a kind of building material hardness detection device, including installation cylinder, fixed plate being arranged in installation cylinder and with installation through sliding seal connection sliding plate, sliding plate and fixed plate form pneumatic chamber between and be equipped with several first spring, installation cylinder outer wall is equipped with with the indicating tube that pneumatic chamber is communicated, indicating tube is slidably sealed with indicating piston, indicating tube lateral wall is evenly equipped with scale line;Sliding plate top is equipped with electromagnetic chuck, sliding plate bottom is equipped with installation groove, installation groove is equipped with the impact head that can be adsorbed by electromagnetic chuck, fixed plate is equipped with gas cylinder, gas cylinder and installation groove bottom between are equipped with drive air pipe and control drive air pipe communication or the regulating mechanism that disconnect, solved traditional shao's hardness test process, impact head rebound position and scale line position possibly appear misregistration, lead to reading difficulty, test inaccurate problem.

Description

Technical Field

[0001] This application relates to the field of building material performance testing technology, and specifically discloses a building material hardness testing device. Background Technology

[0002] Hardness testing of building materials is an important means of assessing their quality, safety, and durability. The hardness of building materials directly affects their compressive, tensile, and abrasion resistance. Insufficient material hardness may lead to serious problems such as cracks, deformation, or even collapse during the use of buildings. With the popularization of non-destructive testing, Shore hardness testing of building materials is becoming increasingly common.

[0003] The principle of the Shore hardness test is as follows: an impact head driven by a spring or falling naturally strikes the surface of a building material, and the rebound height of the impact head is measured to calculate the momentum loss of the impact head during the collision. This momentum loss is then used to calculate the compressive strength of the building material, thus obtaining the surface hardness value. Because a large number of building materials need to be tested during construction, and each material requires multiple tests to reduce errors, the most common testing equipment is usually a resistance rebound hammer or a visual Shore hardness tester. However, the resistance rebound hammer is greatly affected by the number of uses and ambient temperature, making it unsuitable for long-term use; while the visual Shore hardness tester is greatly affected by human factors and cannot guarantee that the rebound position of the impact head corresponds to the scale line position, making readings difficult during the test. Therefore, this invention provides a building material hardness testing device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the traditional Shore hardness test, the position of the impact head rebounding may be misaligned with the position of the scale line, leading to difficulty in reading and inaccurate testing.

[0005] To achieve the above objectives, the basic solution of this utility model provides a building material hardness testing device, including an installation cylinder, a fixed plate disposed inside the installation cylinder, and a sliding plate connected to the installation cylinder by a sliding seal. An air pressure chamber is formed between the sliding plate and the fixed plate and is provided with a plurality of first springs. An indicator tube communicating with the air pressure chamber is provided on the outer wall of the installation cylinder. An indicator piston is slidably sealed inside the indicator tube. Scale lines are evenly provided on the side wall of the indicator tube.

[0006] The top of the sliding plate is equipped with an electromagnetic chuck, and the bottom of the sliding plate is equipped with an installation groove. An impact head that can be attracted by the electromagnetic chuck is installed in the installation groove. An air storage cylinder is installed on the fixed plate. A driving air pipe and an adjustment mechanism for controlling the connection or disconnection of the driving air pipe are provided between the air storage cylinder and the bottom of the installation groove.

[0007] The principle and effect of this basic scheme are as follows:

[0008] Compared with existing technologies, this invention, by setting up a pneumatic chamber, utilizes the movement of the sliding plate driven by the rebound of the impact head to compress the first spring, thereby causing the indicator piston to move. The kinetic energy of the impact head is calculated by reading the position change of the indicator piston through the scale, thus calculating the momentum loss of the impact head during the collision. The compressive strength of the building material is then calculated based on the momentum loss. Even if the impact head deviates from its original position during the rebound, the operator can still make accurate readings. Furthermore, it can be used for a long time within the service life of the first spring. This effectively solves the problem of misalignment between the rebound position of the impact head and the scale position in the traditional Shore hardness test, which leads to difficult readings and inaccurate testing.

[0009] Furthermore, the adjustment mechanism includes a connecting sleeve disposed on the side wall of the electromagnetic chuck and an adjusting piston slidably and sealingly connected to the connecting sleeve. One end of the adjusting piston extends out of the connecting sleeve and is provided with a connecting plate. A second spring is provided between the connecting plate and the electromagnetic chuck. The side wall of the connecting sleeve is provided with a connecting hole communicating with the driving air pipe, and the bottom of the connecting sleeve is provided with a guide hole communicating with the bottom of the mounting groove. By energizing and de-energizing the electromagnetic chuck, not only can the impact head be attracted or disconnected, but the adjusting piston can also be attracted or disconnected, thereby automatically controlling the driving air pipe to disconnect or connect.

[0010] Furthermore, the connecting sleeve is provided with a connecting ring on its exterior, and the connecting ring has an air guide channel inside to connect the connecting hole and the driving air pipe. This facilitates the connection between the connecting hole and the driving air pipe.

[0011] Furthermore, a blocking block is provided at the bottom of the fixing plate. When the connecting plate contacts the blocking block, the end of the adjusting piston is located inside the connecting sleeve. This is to prevent the adjusting piston from disengaging from the connecting sleeve and affecting the sealing performance of the air pressure chamber.

[0012] Furthermore, the top of the mounting cylinder is also equipped with an air pump connected to the air storage cylinder and a portable power source for supplying power to the air pump and electromagnetic chuck. This facilitates the supply of air to the air storage cylinder, thereby creating a high-pressure environment inside the cylinder and enhancing the airflow impact on the impact head.

[0013] Furthermore, the top of the air storage cylinder is equipped with a pressure indicator tube, inside which is a pressure piston, and a pressure spring is installed between the pressure piston and the pressure indicator tube. This allows the operator to directly observe the air pressure inside the air storage cylinder. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0015] Figure 1 A schematic diagram of a building material hardness testing device according to an embodiment of this application is shown;

[0016] Figure 2 A cross-sectional view of a building material hardness testing device according to an embodiment of this application is shown;

[0017] Figure 3 A schematic diagram of the adjustment mechanism of a building material hardness testing device according to an embodiment of this application is shown. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] The reference numerals in the accompanying drawings include: mounting cylinder 1, mounting lug 2, air outlet gap 3, indicator tube 4, air pump 5, mobile power supply 6, air storage cylinder 7, air pressure indicator tube 8, air inlet tube 9, air pressure spring 10, indicator piston 11, fixing plate 12, sliding plate 13, first spring 14, impact head 15, blocking block 16, electromagnetic chuck 17, connecting ring 18, drive air pipe 19, connecting sleeve 20, connecting plate 21, adjusting piston 22, and second spring 23.

[0020] A building material hardness testing device, implementing, for example Figure 1 As shown: The device includes a mounting cylinder 1, with several mounting lugs 2 at its bottom, and several air outlet gaps 3 evenly distributed on the bottom sidewall of the mounting cylinder 1. Figure 2 As shown, a fixed plate 12 is welded inside the mounting cylinder 1. Below the fixed plate 12, a sliding plate 13 is located above the air outlet gap 3. The periphery of the sliding plate 13 is slidably and sealingly connected to the inner wall of the mounting cylinder 1, forming a pressure chamber between the sliding plate 13 and the fixed plate 12. Several first springs 14 are provided between the sliding plate 13 and the fixed plate 12. The outer wall of the mounting cylinder 1 is provided with a transparent indicator tube 4 that communicates with the pressure chamber. An indicator piston 11 is slidably and sealingly installed inside the indicator tube 4. The side wall of the indicator tube 4 is evenly provided with scale lines.

[0021] like Figure 2 and Figure 3As shown, the top of the sliding plate 13 is provided with an electromagnetic chuck 17, and the bottom of the sliding plate 13 is provided with a mounting groove. An impact head 15, which can be attracted by the electromagnetic chuck 17, is located in the mounting groove. The impact head 15 includes an impact housing and an iron ball disposed within the impact housing. When the electromagnetic chuck 17 is energized, it attracts the impact head 15; when the electromagnetic chuck 17 is de-energized, it releases the impact head 15. To increase the release speed of the impact head 15 and thus enhance its impact effect, an air storage cylinder 7 is provided on the fixed plate 12. A flexible drive air pipe 19 is provided between the air storage cylinder 7 and the bottom of the mounting groove. An adjustment mechanism for controlling the connection or disconnection of the drive air pipe 19 is provided in the air pressure chamber.

[0022] like Figure 3 As shown, the adjustment mechanism includes a connecting sleeve 20 on the top of the electromagnetic chuck 17, an adjusting piston 22 slidably and sealingly connected to the connecting sleeve 20, and a connecting ring 18 outside the connecting sleeve 20. The end of the air guide channel communicates with the side wall of the connecting ring 18. The connecting ring 18 has an air guide channel communicating with the air guide channel. The adjusting piston 22 has a magnet attracted by the electromagnetic chuck 17. One end of the adjusting piston 22 extends out of the connecting sleeve 20 and has a connecting plate 21. A second spring 23 is provided between the connecting plate 21 and the electromagnetic chuck 17. The side wall of the connecting sleeve 20 has a connecting hole communicating with the air guide channel. The bottom of the connecting sleeve 20 has an air guide hole that penetrates the electromagnetic chuck 17 and the sliding plate 13 and communicates with the bottom of the mounting groove.

[0023] like Figure 1 and Figure 2 As shown, the bottom of the fixing plate 12 is provided with a blocking block 16. When the connecting plate 21 contacts the blocking block 16, the end of the adjusting piston 22 is located inside the connecting sleeve 20. The top of the mounting cylinder 1 is also provided with an air pump 5 connected to the air storage cylinder 7 through the air inlet pipe 9 and a mobile power supply 6 that supplies power to the air pump 5 and the electromagnetic chuck 17. A one-way valve is provided on the air inlet pipe 9. A control button for controlling the power on and off of the air pump 5 and the electromagnetic chuck 17 is provided on the outside of the mounting cylinder 1. The top of the air storage cylinder 7 is also provided with a pressure indicator tube 8. A pressure piston is provided inside the pressure indicator tube 8. A pressure spring 10 is provided between the pressure piston and the pressure indicator tube 8.

[0024] In this embodiment, when the electromagnetic chuck 17 is energized, the impact head 15 and the adjusting piston 22 are blocked. At this time, the connection hole is blocked by the adjusting piston 22. Air can be supplied to the air storage cylinder 7 by turning on the air pump 5, so that a high-pressure environment is formed in the air storage cylinder 7. After the air pressure in the air storage cylinder 7 reaches the set parameter, the air pump 5 is turned off and the electromagnetic chuck 17 is de-energized. At the same time, the impact head 15 is released, and the second spring 23 causes the adjusting plate and the adjusting piston 22 to move upward, opening the connection hole. The high-pressure airflow pushes the impact head 15 and is discharged along the air outlet gap 3. The impact head 15 impacts the surface of the building material at high speed and rebounds. After rebounding, the impact head 15 contacts the sliding plate 13 and pushes the sliding plate 13 to move. Simultaneously, the first spring 14 is compressed, causing the indicator piston 11 to move. The kinetic energy of the impact head 15 is calculated by reading the position change of the indicator piston 11 through the scale line, thereby calculating the momentum loss of the impact head 15 during the collision. The compressive strength of the building material is then calculated based on the momentum loss. Even if the impact head 15 deviates from its original position during the rebound process, the operator can still make accurate readings. Furthermore, it can be used for a long time within the service life of the first spring 14, effectively solving the problem that the rebound position of the impact head 15 may be misaligned with the scale line position in the traditional Shore hardness test, leading to difficult readings and inaccurate testing.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A device for testing the hardness of building materials, characterized in that, It includes an installation cylinder, a fixed plate disposed inside the installation cylinder, and a sliding plate connected to the installation cylinder by a sliding seal. A pneumatic cavity is formed between the sliding plate and the fixed plate and is provided with several first springs. An indicator tube communicating with the pneumatic cavity is provided on the outer wall of the installation cylinder. An indicator piston is slidably sealed inside the indicator tube. Scale lines are evenly provided on the side wall of the indicator tube. The top of the sliding plate is equipped with an electromagnetic chuck, and the bottom of the sliding plate is equipped with an installation groove. An impact head that can be attracted by the electromagnetic chuck is installed in the installation groove. An air storage cylinder is installed on the fixed plate. A driving air pipe and an adjustment mechanism for controlling the connection or disconnection of the driving air pipe are provided between the air storage cylinder and the bottom of the installation groove.

2. The building material hardness testing device according to claim 1, characterized in that, The adjustment mechanism includes a connecting sleeve disposed on the side wall of the electromagnetic chuck and an adjusting piston that is slidably and sealingly connected to the connecting sleeve. One end of the adjusting piston extends out of the connecting sleeve and is provided with a connecting plate. A second spring is provided between the connecting plate and the electromagnetic chuck. The side wall of the connecting sleeve is provided with a connecting hole that communicates with the driving air pipe. The bottom of the connecting sleeve is provided with a guide hole that communicates with the bottom of the mounting groove.

3. The building material hardness testing device according to claim 2, characterized in that, The connecting sleeve is provided with a connecting ring on the outside, and the connecting ring is provided with an air guide channel that connects the connecting hole to the driving air pipe.

4. A building material hardness testing device according to claim 2 or 3, characterized in that, The bottom of the fixed plate is provided with a blocking block. When the connecting plate contacts the blocking block, the end of the adjusting piston is located inside the connecting sleeve.

5. The building material hardness testing device according to claim 1, characterized in that, The top of the mounting cylinder is also equipped with an air pump connected to the air storage cylinder and a mobile power supply that powers the air pump and the electromagnetic chuck.

6. The building material hardness testing device according to claim 5, characterized in that, The top of the gas storage cylinder is also equipped with a pressure indicator tube, inside which is a pressure piston, and a pressure spring is provided between the pressure piston and the pressure indicator tube.

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