A concrete performance detection device

Abstract

This invention relates to the field of concrete testing technology and discloses a concrete performance testing device, including a housing. A support column is installed between the upper and lower bottom surfaces of the housing. A hydraulic cylinder is fixedly installed on the top surface of the housing. A hydraulic rod is movably connected to the lower part of the hydraulic cylinder. The bottom of the hydraulic rod is fixedly connected to a pressure plate. A tray is fixedly installed on the bottom surface of the housing. An air extractor and a liquid storage tank are provided in the cavity on the right side of the housing. The liquid storage tank and the air extractor are connected to a detector through pipes. The detector can detect whether cracks appear on the surface of the concrete specimen. This invention improves the accuracy of the test by setting up a detector to determine the pressure on the concrete specimen when it reaches the destructive load.

Description

Technical Field

[0001] This invention relates to the field of concrete testing technology, specifically to a concrete performance testing device. Background Technology

[0002] Concrete is characterized by abundant and inexpensive raw materials and a simple production process, leading to its increasing use. It also boasts high compressive strength, good durability, and a wide range of strength grades. These characteristics make its applications extremely broad, thus necessitating precise testing of its compressive strength.

[0003] The current method for testing concrete failure load mainly involves using a hydraulic device to apply pressure to concrete test blocks at rated power. When cracks or breakage are observed in the concrete test blocks, the pressure is stopped and the pressure value is read. However, whether the concrete test block has reached the failure load depends heavily on the judgment of the staff. If the cracks are very fine or appear in the blind spot of the staff, and the staff fails to make a timely judgment, the pressure of the hydraulic press will continue to increase, which can easily lead to an overestimation of the measured value. This could result in the use of substandard products, which could easily cause engineering accidents in buildings due to substandard concrete quality, endangering the lives and property of the people. Therefore, obtaining more accurate measurement values ​​is essential. Summary of the Invention

[0004] In view of the shortcomings of existing concrete testing devices mentioned in the background art, the present invention provides a concrete performance testing device. By wrapping a detector around the concrete test block, it can more timely and accurately determine whether the concrete test block has reached the destructive load, so as to obtain more accurate measurement values.

[0005] This invention provides the following technical solution: a concrete performance testing device, comprising a housing, a tray fixedly installed on the lower left side plate of the housing for placing concrete test blocks, a hydraulic cylinder fixedly installed on the top surface of the housing directly above the tray, the lower part of the hydraulic cylinder being movably connected to a hydraulic rod, the bottom surface of the hydraulic rod being fixedly connected to a pressure plate, the hydraulic cylinder controlling the hydraulic rod to drive the pressure plate to move up and down to apply pressure to the concrete, a support column fixedly installed between the upper and lower bottom surfaces of the housing, a detector on the tray, magnetic strips fixedly installed at both ends of the detector, the magnetic strips connecting the detector into a square ring structure to cover the concrete test block, a sealing strip on a single inner surface of the square ring structure of the detector, the sealing strip being a ring structure, a positive electrode and a negative electrode on a single inner surface of the detector, the positive electrode being located at the lower part and the negative electrode being located at the upper part, an electrolyte solution being filled into the space enclosed by the sealing strip and the concrete test block, and the degree of load failure of the concrete test block being determined by the increase in impedance between the positive and negative electrodes.

[0006] Preferably, the detector has an "S"-shaped guide groove on a single inner surface. The guide groove is a semi-open pipe. The guide groove has a long slit coaxial with the guide groove on the surface in contact with the concrete to be tested. The space enclosed by the sealing strip and the concrete block to be tested is formed by the guide groove in an "S" shape. The positive electrode is located at the bottom end of the guide groove, and the negative electrode is located at the top end of the guide groove.

[0007] Preferably, one end of the bottom of the guide channel extends out of the detector and is fixedly connected to an injection port, and one end of the top of the guide channel extends out of the detector and is fixedly connected to a return port. One end of the injection port is fixedly connected to a distribution pipe, and the four injection ports located on the outer surface of the detector are interconnected through the distribution pipe. One end of the return port is fixedly connected to a return pipe, and the four return ports located on the outer surface of the detector are interconnected through the return pipe.

[0008] Preferably, an air extraction port is provided between the injection port and the return port. The air extraction port is fixedly installed on the outer surface of the detector. One end of the air extraction port extends into the detector and connects to the cavity formed by the inner ring of the sealing strip and the outside of the guide groove. Air is extracted from the air extraction port to generate negative pressure to adsorb the detector onto the outer wall of the concrete block to be tested.

[0009] Preferably, one end of the air extraction port extending outside the detector is fixedly connected to an air extraction pipe, and the four air extraction ports located on the outer surface of the detector are interconnected through the air extraction pipe.

[0010] Preferably, a plurality of suction cups are provided on a single inner surface of the detector, the suction cups being located at the S-shaped layer gap of the guide groove, and the suction cups being used to assist in the installation of the detector.

[0011] Preferably, both the positive and negative electrodes are connected to the external circuit using magnetic electrodes.

[0012] The present invention has the following beneficial effects:

[0013] 1. This invention sets up a detector on the surface of a concrete test block and uses the rated impedance generated by the electrolyte solution sealed inside the detector as a parameter standard. It determines whether the concrete has reached the failure load based on the change in impedance value after the concrete cracks occur. This allows for timely detection of concrete test blocks reaching the failure load, stopping the hydraulic press from continuing to increase pressure, and obtaining more accurate pressure detection values. This method is more reliable than the traditional method that relies on human observation.

[0014] 2. This invention uses a slender "S"-shaped guide channel as an electrolyte guiding channel, which can also completely cover and adhere to the surface of the concrete to be tested, thereby increasing the rated impedance value between the positive and negative electrodes, thus reducing the impedance detection accuracy requirements of the equipment circuit. At the same time, the narrow and slender guide channel can drain the electrolyte solution when cracks occur in the concrete block to be tested, causing the electrolyte solution conductive channel at the crack to narrow, thereby increasing the impedance in time and thus improving the detection sensitivity.

[0015] 3. This invention solves the problem of debris flying everywhere and causing injury when concrete test blocks break apart, and is difficult to clean up, by covering the surface of the concrete test block with a flexible material. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a perspective view of the present invention;

[0018] Figure 3 This is a schematic diagram of the detector structure of the present invention;

[0019] Figure 4 For the present invention Figure 3 A schematic diagram of the detector structure;

[0020] Figure 5 For the present invention Figure 4 The front view;

[0021] Figure 6 For the present invention Figure 5 A magnified view of a portion of the image;

[0022] Figure 7 This is a unfolded view of the outer surface of the detector of the present invention.

[0023] In the diagram: 1. Housing; 2. Tray; 3. Hydraulic cylinder; 4. Hydraulic rod; 5. Pressure plate; 6. Support column; 7. Connecting pipe; 8. Detector; 80. Fixing block; 81. Injection port; 811. Dividing pipe; 82. Return port; 821. Return pipe; 83. Vacuum port; 831. Vacuum pipe; 84. Positive electrode plate; 85. Guide groove; 86. Suction cup; 87. Negative electrode plate; 88. Magnetic strip; 89. Sealing strip; 9. Liquid storage tank; 91. Liquid replenishment pipe; 92. Liquid supply pipe; 93. Liquid collection pipe; 10. Vacuum pump; 101. Exhaust pipe; 102. Vacuum collection pipe. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1 and Figure 2 A concrete performance testing device includes a housing 1. A tray 2 is fixedly installed on the lower left side plate of the housing 1. The tray 2 is used to place concrete test blocks. A hydraulic cylinder 3 is fixedly installed on the top surface of the housing 1 directly above the tray 2. The lower part of the hydraulic cylinder 3 is movably connected to a hydraulic rod 4. The bottom surface of the hydraulic rod 4 is fixedly connected to a pressure plate 5. The hydraulic cylinder 3 is used to control the hydraulic rod 4 to drive the pressure plate 5 to move up and down to apply pressure to the concrete test blocks. A support column 6 is fixedly installed between the upper and lower bottom surfaces of the housing 1 on the left side of the hydraulic rod 4. The support column 6 is used to increase the overall strength of the housing 1.

[0026] A liquid storage tank 9 is provided in the inner cavity on the right side of the housing 1. The liquid storage tank 9 is filled with an electrolyte solution for conduction. The right wall of the liquid storage tank 9 is fixedly connected to the replenishment pipe 91. The replenishment pipe 91 is fixedly installed on the side of the housing 1 on the right side of the liquid storage tank 9. The replenishment pipe 91 is used to add electrolyte solution into the liquid storage tank 9. A connector 7 is fixedly installed on the left wall of the right cavity of the housing 1. The connector 7 is used to connect the pipes on both sides. The lower part of the left wall of the liquid storage tank 9 is fixedly connected to one end of the supply pipe 92. The other end of the supply pipe 92 is fixedly connected to the connector 7 on the left side. The upper part of the left wall of the liquid storage tank 9 is fixedly connected to one end of the collection pipe 93. The other end of the collection pipe 93 is fixedly connected to the connector 7.

[0027] See Figure 3 and Figure 7 Magnetic strips 88 are fixedly installed at both ends of the detector 8. These magnetic strips 88 connect the detector 8 into a square ring structure to cover the concrete test block. This prevents debris from flying out and injuring people when the concrete test block breaks, and also prevents debris from scattering and making cleanup difficult. (See also...) Figure 4 and Figure 5A sealing strip 89 is provided on a single inner surface of the square ring structure of the detector 8. The sealing strip 89 is a ring structure, and the arrangement path of the sealing strip 89 can be close to the edge line of the inner surface of one side of the detector 8. Within the annular structure of the sealing strip 89, the detector 8 has, from top to bottom, a return port 82, an extraction port 83, and an injection port 81. The return port 82, extraction port 83, and injection port 81 are all cylindrical structures that penetrate the inner and outer surfaces of the detector 8. A single inner surface of the detector 8 has an S-shaped guide groove 85, which is a semi-open pipe. A long slit coaxial with the guide groove 85 is formed on the surface in contact with the concrete. The lower end of the guide groove 85 is fixedly connected to the sidewall of the inner end of the injection port 81, and the upper end of the guide groove 85 is fixedly connected to the sidewall of the inner end of the return port 82. Several suction cups 86 are fixedly installed on the inner surface of the detector 8 at the S-shaped gap of the guide groove 85. The suction cups 86 are used to adhere the detector 8 to the surface of the concrete sample block. For the installation method of the positive electrode 84 and the negative electrode 87, please refer to [reference needed]. Figure 6 A fixing block 80 is fixedly installed on the annular inner wall of the injection port 81 and the return port 82. The positive electrode plate 84 inside the injection port 81 is fixedly connected to the fixing block 80. The negative electrode plate 87 inside the return port 82 is fixedly connected to the fixing block 80. The positive electrode plate 84 and the negative electrode plate 87 are connected to the external detection circuit of the present invention. Both the positive electrode plate 84 and the negative electrode plate 87 are magnetic electrodes, which facilitates the connection with the external circuit.

[0028] The side wall of the outer end of the injection port 81 is fixedly connected to the liquid distribution pipe 811. The four injection ports 81 located on the outer surface of the detector 8 are interconnected through the liquid distribution pipe 811. The side wall of the outer end of the return port 82 is fixedly connected to the return pipe 821. The four return ports 82 located on the outer surface of the detector 8 are interconnected through the return pipe 821. The side wall of the outer end of the suction port 83 is fixedly connected to the suction pipe 831. The four suction ports 83 located on the outer surface of the detector 8 are interconnected through the suction pipe 831. The injection port 81 near the connector 7 is fixedly sleeved with the liquid supply pipe 92 on the connector 7 through a hose. The return port 82 near the connector 7 is fixedly sleeved with the liquid collection pipe 93 on the connector 7 through a hose.

[0029] The external ports of the return port 82, the air extraction port 83, and the liquid injection port 81, which are not located near the connector 7, are all sealed.

[0030] See Figure 1 An air extractor 10 is provided in the inner cavity on the right side of the housing 1. The right side of the air extractor 10 is fixedly connected to the exhaust pipe 101. The exhaust pipe 101 is fixedly installed on the right side of the housing 1. The left side of the air extractor 10 is fixedly connected to one end of the air collecting pipe 102. The other end of the air collecting pipe 102 is fixedly connected to the connecting pipe 7. The air extraction port 83 near the connecting pipe 7 is fixedly connected to the air collecting pipe 102 on the connecting pipe 7 through a flexible hose.

[0031] The method of use (working principle) of this invention is as follows: Place the standard concrete test block to be measured on the tray 2, place the detector 8 on the side of the concrete test block and press it slightly. The suction cup 86 inside the detector 8 adheres to the surface of the concrete test block, helping to fix the detector 8 to the surface of the concrete. Then, connect the detector 8 end to end through the magnetic strip 88. Connect the external detection circuit to the positive electrode 84 and the negative electrode 87. Start the air extraction machine 10. The air between the inner surface of the detector 8 and the concrete test block enters the air extraction pipe 831 through the air extraction port 83. The air continues to enter the air collection pipe 102 through the connector 7 and is finally discharged through the exhaust pipe 101. At this time, under the sealing action of the sealing strip 89, the detector 8 is tightly attached to the surface of the concrete test block under the action of atmospheric pressure.

[0032] Start the storage tank 9. The electrolyte solution in the storage tank 9 is pumped into the supply pipe 92, and then enters the distribution pipe 811 through the connector 7. The electrolyte solution continues to be injected into the guide trough 85 through the injection port 81. When the guide trough 85 is full of electrolyte solution, the excess electrolyte solution overflows from the return port 82 into the return pipe 821. The overflowing electrolyte solution enters the collection pipe 93 through the connector 7, and finally flows back into the storage tank 9. Then, close the storage tank 9 to stop the supply of electrolyte solution.

[0033] The external detection circuit energizes the electrolyte solution in the guide channel 85 through the positive electrode 84 and the negative electrode 87. After the impedance of the electrolyte solution stabilizes, the initial impedance is obtained. The hydraulic press is started, and the hydraulic rod 4 pushes the pressure plate 5 to squeeze the concrete test block on the tray 2. When the concrete test block reaches the destructive load, cracks appear on the concrete surface, and the electrolyte solution in the guide channel 85 penetrates into the cracks. Due to the loss of electrolyte solution, the impedance measured by the external detection circuit changes. When the change value exceeds the preset value (the preset value can be obtained by actual measurement according to the evaluation standard specified by the client), the hydraulic press stops pressurizing and the concrete is observed to be destroyed. The pressure of the hydraulic press is read as the destructive load. Due to the encapsulation effect of the soft external detector 8, the debris of the concrete test block is wrapped inside the detector 8 for easy cleaning.

Claims

1. A concrete performance testing device, comprising a housing (1), wherein a tray (2) is fixedly installed on the lower left side plate of the housing (1), the tray (2) is used to place concrete test blocks, a hydraulic cylinder (3) is fixedly installed on the top surface of the housing (1) directly above the tray (2), the lower part of the hydraulic cylinder (3) is movably connected to a hydraulic rod (4), the bottom surface of the hydraulic rod (4) is fixedly connected to a pressure plate (5), the hydraulic cylinder (3) is used to control the hydraulic rod (4) to drive the pressure plate (5) to move up and down to apply pressure to the concrete, and a support column (6) is fixedly installed between the upper and lower bottom surfaces of the housing (1), characterized in that: The tray (2) is equipped with a detector (8). Magnetic strips (88) are fixedly installed at both ends of the detector (8). The magnetic strips (88) are used to connect the detector (8) into a square ring structure to cover the concrete test block. A sealing strip (89) is provided on a single inner surface of the square ring structure of the detector (8). The sealing strip (89) is a ring structure. A positive electrode (84) and a negative electrode (87) are provided on a single inner surface of the detector (8). The positive electrode (84) is located at the bottom and the negative electrode (87) is located at the top. An electrolyte solution is filled into the space enclosed by the sealing strip (89) and the concrete block to be tested. The increase in impedance between the positive electrode (84) and the negative electrode (87) is used to determine whether the concrete block to be tested has reached the degree of load failure.

2. The concrete performance testing device according to claim 1, characterized in that: The detector (8) has an "S"-shaped guide groove (85) on a single inner surface. The guide groove (85) is a semi-open pipe. The guide groove (85) has a long slit in the same axis as the guide groove (85) on the surface that contacts the concrete block to be tested. The space enclosed by the sealing strip (89) and the concrete block to be tested is formed by the guide groove (85) in an "S" shape. The positive electrode (84) is located at the bottom end of the guide groove (85), and the negative electrode (87) is located at the top end of the guide groove (85).

3. The concrete performance testing device according to claim 2, characterized in that: One end of the bottom of the guide channel (85) extends out of the detector (8) and is fixedly connected to the injection port (81). One end of the top of the guide channel (85) extends out of the detector (8) and is fixedly connected to the return port (82). One end of the injection port (81) is fixedly connected to the liquid distribution pipe (811). The four injection ports (81) located on the outer surface of the detector (8) are interconnected through the liquid distribution pipe (811). One end of the return port (82) is fixedly connected to the return pipe (821). The four return ports (82) located on the outer surface of the detector (8) are interconnected through the return pipe (821).

4. The concrete performance testing device according to claim 3, characterized in that: An air extraction port (83) is provided between the injection port (81) and the return port (82). The air extraction port (83) is fixedly installed on the outer surface of the detector (8). One end of the air extraction port (83) extends into the detector (8) and connects to the cavity formed by the inner ring of the sealing strip (89) and the outside of the guide groove (85). Air is extracted from the air extraction port (83) to generate negative pressure to adsorb the detector (8) onto the outer wall of the concrete block to be tested.

5. The concrete performance testing device according to claim 4, characterized in that: The end of the air extraction port (83) extending outside the detector (8) is fixedly connected to an air extraction pipe (831), and the four air extraction ports (83) located on the outer surface of the detector (8) are connected to each other through the air extraction pipe (831).

6. The concrete performance testing device according to claim 4, characterized in that: The detector (8) has a plurality of suction cups (86) on a single inner surface. The suction cups (86) are located at the S-shaped gap of the guide groove (85) and are used to assist in the installation of the detector (8).

7. A concrete performance testing device according to claim 2, characterized in that: Both the positive electrode (84) and the negative electrode (87) are connected to the external circuit using magnetic electrodes.

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