A concrete air content detection device

Abstract

The invention relates to a concrete gas content detection device applied to the field of concrete detection. When a measuring tube is inserted into concrete and the concrete is vibrated for detection, firstly, a pair of pull ropes are pulled in the same direction and the same distance to adjust the upper and lower positions of the vibrating rod. Secondly, the pair of pull ropes are pulled in different directions to adjust the horizontal position of the vibrating rod on the round rod. Then, combined with the rotation of a rotating plate, the vibrating rod is rotated in a circle in the measuring tube to vibrate the concrete in a transposition manner so that the gas inside the concrete can be fully overflowed, thereby effectively improving the accuracy of gas content detection. Moreover, before vibration, a plastic film is unwound and pulled to be laid on the lower port of the measuring tube, thereby effectively isolating the concrete inside and outside the measuring tube, effectively reducing the situation where the gas in the concrete outside the measuring tube enters the measuring tube, thereby further improving the detection accuracy.

Description

Technical Field

[0001] The present invention relates to a detection device, in particular to a concrete air content detection device applied in the field of concrete detection. Background Art

[0002] The concrete air content meter is used to measure the air content in the mixture. The coarse aggregate particle size has almost no direct effect on the air content. The measured air content is distributed in the fine particles of concrete, namely the mortar. Traditional air content meters are basically used in indoor mix design, but after the concrete is mixed according to the on-site construction mix ratio, the measurement of air content is often neglected.

[0003] The specification of Chinese patent CN201911295348.7 discloses a BIM-based on-site concrete air content measuring instrument, including a sampling measuring cylinder at the bottom, an air collecting cover at the top, a vibrating component and an air pressure gauge at the top of the air collecting cover; the measuring cylinder is a cylindrical structure with upper and lower openings and a hollow interior; a supporting portion is provided at the top of the measuring cylinder, the air collecting cover is in a hollow cone shape so as to form an air collecting cavity therein, the lower end of the air collecting cover is sealedly connected to the upper part of the measuring cylinder, and the upper part thereof is sealedly connected to the air pressure gauge via a three-way valve; a handle is provided on the outer side of the air collecting cover; a fixed-depth floating plate is provided on the outer side of the measuring cylinder, the fixed-depth floating plate is located at the lower part of the supporting portion and is fixedly mounted on the outer wall of the sampling measuring cylinder, and is used to mark the depth of the sampling measuring cylinder immersed in the concrete, without separating the concrete sample from the concrete to be tested, and can truly simulate the air content of the concrete.

[0004] However, the above-mentioned measuring instrument for detecting the air content of concrete on site still has the following defects: first, the vibration position of the concrete in the measuring instrument is fixed, and the vibration is not sufficient; second, when vibrating the concrete in the measuring instrument, the concrete inside and outside the measuring instrument are not isolated, but connected, which makes it easy for the vibration force to act on the external concrete, thereby causing gas to enter the measuring instrument and affect the air pressure measurement results. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing measuring instruments for detecting the air content of on-site concrete have inaccurate detection results due to factors such as insufficient vibration and unisolated concrete.

[0006] In order to solve the above problems, the present invention provides a concrete air content detection device, comprising a measuring cylinder and an air collecting cover, the air collecting cover is fixedly connected to the upper end of the measuring cylinder, the upper end of the air collecting cover is fixedly connected to a pressure gauge through an air pipe, a three-way valve is installed on the air pipe, a vibrating rod is arranged inside the measuring cylinder, a rotating plate is rotatably connected to the inner wall of the measuring cylinder, a round rod is arranged on the lower side of the rotating plate, a pair of telescopic rods are fixedly connected between the round rod and the rotating plate, a slider is fixedly connected to the upper end of the vibrating rod, the slider is slidably connected to the outer end of the round rod, and the slider is located between the pair of telescopic rods;

[0007] The upper end of the rotating plate is fixedly connected to a hollow rotating rod, the upper end of the hollow rotating rod is fixedly passed through the gas gathering cover and extends to the outside, the outer end of the slider is fixedly connected to a pair of pull ropes, the pull ropes move through the interior of the rotating plate and the hollow rotating rod in turn and extend from the top of the hollow rotating rod to the outside, the interior of the rotating plate and the round rod are fixedly connected to magnets, and the ends of the magnets inside the rotating plate and the magnets inside the round rod that are close to each other are of the same pole.

[0008] As a further supplement to the present application, the pair of pull ropes have the same length, the pair of telescopic rods are respectively located at a pair of end positions of the round rod, and the connection positions of the pair of pull ropes and the rotating plate are respectively close to the pair of telescopic rods.

[0009] As a further supplement to the present application, an annular groove is provided at the side end of the rotating plate, and a rotating ring is fixedly connected to the inner wall of the measuring cylinder, and the rotating ring is rotatably connected to the inside of the annular groove.

[0010] As a further supplement to the present application, non-adjacent side ends of the measuring tube are fixedly connected with floating plates, and the top end of the hollow rotating rod is fixedly connected with a hand wheel.

[0011] A concrete air content detection device, the detection method of which comprises the following steps:

[0012] S1. Open the three-way valve on the air pipe to connect it to the outside world, insert the lower end of the measuring tube into the concrete to be tested, the concrete enters the measuring tube, and the gas in the measuring tube is discharged through the three-way valve;

[0013] S2. After the measuring tube is immersed in the concrete to a specified depth, turn the three-way valve to connect it to the pressure gauge, and measure the air pressure value in the air collecting cover with the pressure gauge and record it. After recording, close the three-way valve again;

[0014] S3, start the vibrating rod to vibrate the concrete in the measuring cylinder. During the vibration process, the hollow rotating rod can be manually rotated to rotate the vibrating rod in the measuring cylinder to vibrate the concrete at different positions. In addition, the pair of pull ropes are pulled in the same direction and in different directions at intervals to adjust the up and down position and horizontal position of the vibrating rod to achieve comprehensive vibration of the concrete, so that the gas inside the concrete can fully overflow upward and enter the inner side of the gas collecting cover;

[0015] S4. Open the three-way valve to connect it to the pressure gauge, test and record the air pressure in the air collecting cover again, compare the pressure difference between the two measurements, and compare the pressure difference with the standard value to judge the air content of the concrete.

[0016] As another improvement of the present application, the outer end of the measuring cylinder is fixedly connected to two pairs of mounting seats, an electric rotating shaft is rotatably connected between each pair of mounting seats, and the pair of electric rotating shafts are respectively located on a pair of side ends of the measuring cylinder without floating plates.

[0017] As another improved supplement of the present application, the outer end of one electric rotating shaft is fixedly connected to one end of a plastic film, the outer end of the other electric rotating shaft is fixedly connected to one end of a pair of traction ropes, and the other end of the plastic film and the other end of the traction rope are fixedly connected to each other.

[0018] As another improved supplement of the present application, in the initial state, the plastic film is wound around the outer end of the electric rotating shaft, and the traction rope is passed around the bottom end of the measuring tube.

[0019] As another improved supplement of the present application, a concrete isolation operation may be performed between step S2 and step S3, as follows:

[0020] Start a pair of electric rotating shafts to unwind the plastic film and reel in the traction rope, so that the traction rope drives a pair of plastic films to gradually bypass the bottom of the measuring cylinder. When the plastic film completely blocks the lower port of the measuring cylinder, close the electric rotating shaft to effectively isolate the concrete in the measuring cylinder from the concrete outside the measuring cylinder, thereby further improving the accuracy of air pressure detection after vibration.

[0021] To summarize, when the measuring cylinder is inserted into the concrete and the concrete is vibrated for detection, the present application firstly pulls a pair of pull ropes in the same direction and the same distance to adjust the upper and lower positions of the vibrating rod, and then pulls a pair of pull ropes in different directions to adjust the horizontal position of the vibrating rod on the round rod, and then combines the rotation of the rotating plate to achieve circular rotation of the vibrating rod in the measuring cylinder, and vibrates the concrete in a displaced manner to allow the internal gas to fully overflow, thereby effectively improving the accuracy of gas content detection. Moreover, before vibration, the plastic film is unwound and pulled to be laid on the lower port of the measuring cylinder, thereby effectively isolating the concrete inside and outside the measuring cylinder, effectively reducing the gas in the concrete outside the measuring cylinder from entering the measuring cylinder, and further improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The three-dimensional embodiment of the first and second embodiments of this application Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the front structure of the first and second embodiments of this application. Figure 1 ;

[0024] Figure 3 It is a three-dimensional cross-sectional view of the first and second embodiments of the present application;

[0025] Figure 4 This is a schematic diagram of the front structure of the first and second embodiments of this application. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the front structure of the first and second embodiments of this application. Figure 3 ;

[0027] Figure 6 The three-dimensional embodiment of the first and second embodiments of this application Figure 2 ;

[0028] Figure 7 The three-dimensional embodiment of the first and second embodiments of this application Figure 3 ;

[0029] Figure 8 This is a front structural schematic diagram of the second implementation mode of the present application;

[0030] Description of the numbers in the figure:

[0031] 1 measuring cylinder, 101 rotating ring, 2 gas collecting cover, 3 pressure gauge, 301 air pipe, 4 vibrating rod, 5 rotating plate, 6 hollow rotating rod, 7 telescopic rod, 8 round rod, 9 sliding block, 10 pulling rope, 11 mounting seat, 12 electric rotating shaft, 13 plastic film, 14 pulling rope, 15 floating plate. DETAILED DESCRIPTION

[0032] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0033] The first implementation method:

[0034] The present invention provides a concrete air content detection device, please refer to Figure 1 , Figure 2 and Figure 3 , including a measuring cylinder 1 and a gas gathering cover 2, the gas gathering cover 2 is fixedly connected to the upper end of the measuring cylinder 1, the upper end of the gas gathering cover 2 is fixedly connected to a pressure gauge 3 through an air pipe 301, and a three-way valve (not shown in the figure) is installed on the air pipe 301. A vibrating rod 4 is provided inside the measuring cylinder 1, and a rotating plate 5 is rotatably connected to the inner wall of the measuring cylinder 1. A round rod 8 is provided on the lower side of the rotating plate 5, and a pair of telescopic rods 7 are fixedly connected between the round rod 8 and the rotating plate 5. The upper end of the vibrating rod 4 is fixedly connected to a sliding block 9, which is slidably connected to the outer end of the round rod 8, and the sliding block 9 is located between the pair of telescopic rods 7.

[0035] The upper end of the rotating plate 5 is fixedly connected to a hollow rotating rod 6, the upper end of the hollow rotating rod 6 is fixedly passed through the gas collecting cover 2 and extends to the outside, the outer end of the slider 9 is fixedly connected to a pair of pull ropes 10, the pull ropes 10 are movably passed through the inside of the rotating plate 5 and the hollow rotating rod 6 in turn and movably extend from the top of the hollow rotating rod 6 to the outside, and the position of the slider 9 is adjusted by manually pulling the pair of pull ropes 10, the inside of the rotating plate 5 and the round rod 8 are fixedly connected with magnets, and the ends of the magnets inside the rotating plate 5 and the magnets inside the round rod 8 that are close to each other are of the same pole;

[0036] Double-pass adjustment process for the position of the vibrator 4:

[0037] 1. When no external force is applied, the round rod 8 tends to move away from the rotating plate 5 due to the magnetic repulsion of the magnet, as shown by the vibrating rod 4. At this time, the lower end of the vibrating rod 4 is nearly flush with the lower end of the measuring cylinder 1. When a pair of pull ropes 10 are manually pulled upward at the same time, the slider 9 can drive the round rod 8 to move upward under the pulling force of the pull ropes 10, and the telescopic rod 7 can be retracted, thereby adjusting the upper and lower positions of the vibrating rod 4 to vibrate the concrete at different depths in the measuring cylinder 1;

[0038] 2. If Figure 5 As shown, one of the pull ropes 10 is in a free state, and then the other pull rope 10 is pulled outward. Under the pulling of one pull rope 10, the slider 9 can move and slide on the round rod 8 to adjust the horizontal position of the vibrating rod 4. At this time, when the hollow rotating rod 6 is rotated, the hollow rotating rod 6 drives the rotating plate 5, the telescopic rod 7, and the round rod 8 to rotate, so that the vibrating rod 4 can rotate in a circle in the measuring cylinder 1, and the concrete can be vibrated in a transposition manner.

[0039] A pair of pull ropes 10 have the same length, a pair of telescopic rods 7 are respectively located at a pair of end positions of the round rod 8, and the connection positions of the pair of pull ropes 10 and the rotating plate 5 are respectively close to the pair of telescopic rods 7, so that the slider 9 has a longer moving range on the round rod 8, which is convenient for the vibration process of different circular motions.

[0040] An annular groove is formed at the side end of the rotating plate 5, and a rotating ring 101 is fixedly connected to the inner wall of the measuring cylinder 1. The rotating ring 101 is rotatably connected to the inside of the annular groove. Through the cooperation between the rotating ring 101 and the annular groove, the rotating plate 5 can rotate stably in the measuring cylinder 1.

[0041] The non-adjacent side ends of the measuring tube 1 are fixedly connected with floating plates 15, and the top end of the hollow rotating rod 6 is fixedly connected with a hand wheel. The hollow rotating rod 6 plays a positioning role in the insertion process of the measuring tube 1 in the concrete. When the lower end of the hollow rotating rod 6 contacts the concrete surface, the insertion of the measuring tube 1 is stopped.

[0042] A concrete air content detection device, the detection method of which comprises the following steps:

[0043] S1. Open the three-way valve on the air pipe 301 to connect it with the outside world, insert the lower end of the measuring tube 1 into the concrete to be tested, the concrete enters the measuring tube 1, and the gas in the measuring tube 1 is discharged through the three-way valve;

[0044] S2, after the measuring tube 1 is immersed in the concrete to a specified depth, the three-way valve is turned to connect it with the pressure gauge 3, and the pressure value in the gas collecting cover 2 is measured and recorded by the pressure gauge. After the recording is completed, the three-way valve is closed again;

[0045] S3, start the vibrating rod 4 to vibrate the concrete in the measuring tube 1. During the vibration process, the hollow rotating rod 6 can be manually rotated to rotate the vibrating rod 4 in the measuring tube 1 to vibrate the concrete at different positions. In addition, the pair of pull ropes 10 are pulled in the same direction and in different directions at intervals to adjust the up and down position and the horizontal position of the vibrating rod 4 (see the above double-channel adjustment process for details) to achieve comprehensive vibration of the concrete, so that the gas inside it fully overflows upward and enters the inner side of the gas collecting cover 2;

[0046] S4, open the three-way valve to connect it with the pressure gauge 3, detect and record the air pressure in the air collecting cover 2 again, compare the pressure difference between the two measurements, and compare the pressure difference with the standard value to judge the air content of the concrete;

[0047] The judgment method is the same as the prior art. When the air pressure difference exceeds the threshold, it is determined that the air content of the concrete is too high, and the cause needs to be found and re-poured.

[0048] Second implementation method:

[0049] This embodiment adds the following structure based on the embodiment 1: Figure 6 and Figure 7 The outer end of the measuring cylinder 1 is fixedly connected to two pairs of mounting seats 11, and an electric rotating shaft 12 is rotatably connected between each pair of mounting seats 11. The pair of electric rotating shafts 12 are respectively located on a pair of side ends of the measuring cylinder 1 without the floating plate 15, and the outer end of one of the electric rotating shafts 12 is fixedly connected to one end of a plastic film 13, and the outer end of the other electric rotating shaft 12 is fixedly connected to one end of a pair of traction ropes 14, and the other end of the plastic film 13 and the other end of the traction rope 14 are fixedly connected to each other, and the combination Figure 5 As shown, in the initial state, the plastic film 13 is wound around the outer end of the electric shaft 12, and the traction rope 14 is passed around the bottom end of the measuring tube 1.

[0050] By setting the above structure, the concrete isolation operation can be performed between step S2 and step S3, as follows:

[0051] Combination Figure 8As shown, a pair of electric rotating shafts 12 are started to unwind the plastic film 13 and reel in the traction rope 14, so that the traction rope 14 drives the pair of plastic films 13 to gradually bypass the bottom of the measuring cylinder 1. When the plastic film 13 completely blocks the lower port of the measuring cylinder 1, the electric rotating shaft 12 is closed to effectively isolate the concrete in the measuring cylinder 1 from the concrete outside the measuring cylinder 1, thereby further improving the accuracy of air pressure detection after vibration.

[0052] In the initial state, since the traction rope 14 is at the bottom end of the measuring cylinder 1 and the plastic film 13 is located at the side end of the measuring cylinder 1, the two are not likely to hinder the insertion process of the measuring cylinder 1 in the concrete. Before the concrete needs to be vibrated, the plastic film 13 is unwound and moved to the bottom end of the measuring cylinder 1 by the electric rotating shaft 12, and its bottom port is sealed. During the vibrating of the concrete, even if the vibrating action of the vibrating rod 4 has a vibrating effect on the concrete on the lower side of the measuring cylinder 1, the internal gas is difficult to pass through the plastic film 13 and enter the interior of the measuring cylinder 1 and the gas collecting cover 2, thereby effectively improving the accuracy of the air pressure detection in the gas collecting cover 2 after vibration, and then improving the accuracy of the gas content detection.

[0053] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A concrete air content detection device, comprising a measuring cylinder (1) and an air collecting cover (2), wherein the air collecting cover (2) is fixedly connected to the upper end of the measuring cylinder (1), the upper end of the air collecting cover (2) is fixedly connected to a pressure gauge (3) via an air pipe (301), a three-way valve is installed on the air pipe (301), a vibrating rod (4) is arranged inside the measuring cylinder (1), and the characteristics are: The inner wall of the measuring cylinder (1) is rotatably connected to a rotating plate (5), a round rod (8) is provided on the lower side of the rotating plate (5), a pair of telescopic rods (7) are fixedly connected between the round rod (8) and the rotating plate (5), a slider (9) is fixedly connected to the upper end of the vibrating rod (4), the slider (9) is slidably connected to the outer end of the round rod (8), and the slider (9) is located between the pair of telescopic rods (7); The upper end of the rotating plate (5) is fixedly connected to a hollow rotating rod (6), the upper end of the hollow rotating rod (6) is fixedly passed through the gas collecting cover (2) and extends to the outside, the outer end of the slider (9) is fixedly connected to a pair of pull ropes (10), the pull ropes (10) are movably passed through the inside of the rotating plate (5) and the hollow rotating rod (6) in turn and movably extend from the top of the hollow rotating rod (6) to the outside, the inside of the rotating plate (5) and the round rod (8) are both fixedly connected to magnets, and the ends of the magnets inside the rotating plate (5) and the magnets inside the round rod (8) that are close to each other are of the same pole.

2. A concrete air content detection device according to claim 1, characterized in that: The pair of pull ropes (10) have the same length, the pair of telescopic rods (7) are respectively located at a pair of end positions of the round rod (8), and the connection positions of the pair of pull ropes (10) and the rotating plate (5) are respectively close to the pair of telescopic rods (7).

3. A concrete air content detection device according to claim 1, characterized in that: An annular groove is formed at the side end of the rotating plate (5), and a rotating ring (101) is fixedly connected to the inner wall of the measuring cylinder (1), and the rotating ring (101) is rotatably connected to the inside of the annular groove.

4. A concrete air content detection device according to claim 1, characterized in that: Non-adjacent side ends of the measuring cylinder (1) are fixedly connected to floating plates (15), and the top end of the hollow rotating rod (6) is fixedly connected to a hand wheel.

5. A concrete air content detection device according to claim 4, characterized in that: The outer end of the measuring cylinder (1) is fixedly connected to two pairs of mounting seats (11), and an electric rotating shaft (12) is rotatably connected between each pair of the mounting seats (11). The pair of electric rotating shafts (12) are respectively located on a pair of side ends of the measuring cylinder (1) without a floating plate (15).

6. A concrete air content detection device according to claim 5, characterized in that: The outer end of one of the electric rotating shafts (12) is fixedly connected to one end of a plastic film (13), the outer end of the other electric rotating shaft (12) is fixedly connected to one end of a pair of traction ropes (14), and the other end of the plastic film (13) and the other end of the traction rope (14) are fixedly connected to each other.

7. A method for detecting air content in concrete using the concrete air content detection device according to claim 6, characterized in that: The following steps are involved: S1. Open the three-way valve on the air pipe (301) to connect it to the outside, insert the lower end of the measuring tube (1) into the concrete to be tested, the concrete enters the measuring tube (1), and the gas in the measuring tube (1) is discharged through the three-way valve; S2, after the measuring tube (1) is immersed in the concrete to a specified depth, the three-way valve is turned to connect it with the pressure gauge (3), and the pressure value in the gas collecting cover (2) is measured and recorded by the pressure gauge. After the recording is completed, the three-way valve is closed again; S3, start the vibrating rod (4) to vibrate the concrete in the measuring cylinder (1), during the vibration process, the hollow rotating rod (6) can be manually rotated to rotate the vibrating rod (4) in the measuring cylinder (1) to vibrate the concrete at different positions, and periodically pull a pair of pull ropes (10) in the same direction and in different directions to adjust the up and down position and horizontal position of the vibrating rod (4) to achieve comprehensive vibration of the concrete, so that the gas inside the concrete can fully overflow upward and enter the inner side of the gas collecting cover (2); S4. Open the three-way valve to connect it to the pressure gauge (3), detect and record the air pressure in the air collecting cover (2) again, compare the pressure difference between the two measurements, and compare the pressure difference with the standard value to judge the air content of the concrete.

8. The detection method according to claim 7, characterized in that: In the initial state, the plastic film (13) is wound around the outer end of the electric rotating shaft (12), and the traction rope (14) is wound around the bottom end of the measuring cylinder (1).

9. The detection method according to claim 8, characterized in that: Between step S2 and step S3, a concrete isolation operation may be performed, as follows: A pair of electric rotating shafts (12) are started to unwind the plastic film (13) and reel in the traction rope (14), so that the traction rope (14) drives the pair of plastic films (13) to gradually bypass the bottom of the measuring cylinder (1). When the plastic film (13) completely blocks the lower end of the measuring cylinder (1), the electric rotating shaft (12) is closed to effectively isolate the concrete inside the measuring cylinder (1) from the concrete outside the measuring cylinder (1), thereby further improving the accuracy of air pressure detection after vibration.

Images