High-precision automatic Blaine ventilation instrument
Through the use of light refraction principles and laser timing technology in the Bohlite breathable instrument, the problem of poor detection accuracy of the existing Bohlitestament instrument was solved, and high -precision automatic detection was achieved, and the maintenance cost was reduced.
Patent Information
- Application Number
- CN202420919721.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The existing Berthalm breathable instrument has poor detection accuracy. Due to factors such as fatigue, vision and reaction speed of the detector, the interaction between the float and the U-shaped pressure gauge leads to unstable float, affecting the detection accuracy.
The principle of refraction of light is used to connect the single -chip microcomputer through the laser man reflex switch and the laser to the shooting switch to achieve automatic timing and computing detection results, and improve the detection accuracy.
The high -precision automatic detection has been achieved, reducing the impact of human factors, and improving the reliability and maintenance cost of the test results.
Smart Images
Figure CN222419946U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-precision automatic Blaine permeability instrument, belonging to the technical field of detection equipment. Background Art
[0002] Cement is one of the important raw materials in housing construction, roads, municipal and water conservancy projects. As a testing indicator, cement specific surface area needs to be tested in batches in important projects. At present, it is stipulated that the test should be carried out in accordance with "GBT8074-2008 Cement Specific Surface Area Determination Method Blaine Method". The principle is to determine the specific surface area of cement based on the change in flow rate caused by the different resistance when a certain amount of air passes through a cement layer with a certain porosity and fixed thickness. The specific surface area of the sample is calculated by observing the time taken for the liquid level in the glass U-type pressure gauge to drop to a specified height. In this method, Blaine specific surface area permeameter is used for testing. In actual operation, when using a manual Blaine permeameter for testing, the results are easily affected by factors such as fatigue, vision, and reaction speed of the tester; the automatic Blaine permeameter is to place a float in the U-type pressure gauge and time the time by the work of the float and the photoelectric switch. However, the float interacts with the wall of the U-type pressure gauge tube, causing the float to float up and down continuously without regularity instead of steadily following the drop in liquid level. Sometimes the float even sticks to the tube wall, resulting in poor accuracy of the automatic instrument. Utility Model Content
[0003] The utility model provides a high-precision automatic Blaine breather, which solves the problem of poor detection accuracy of the current Blaine breather.
[0004] The utility model relates to a high-precision automatic Blaine permeation instrument, comprising a permeation cylinder, a tamper, and a U-shaped pressure gauge. The upper end of the U-shaped pressure gauge is connected to an exhaust pipe, the exhaust pipe is provided with a valve, the U-shaped pressure gauge is provided with a first scale, a second scale and a third scale from bottom to top, a laser diffuse reflection switch is provided on both sides of the first scale, a laser opposite beam switch 1 is provided on both sides of the second scale, a laser opposite beam switch 2 is provided on both sides of the third scale, and the laser diffuse reflection switch, the laser opposite beam switch 1 and the laser opposite beam switch 2 are connected to a single-chip microcomputer.
[0005] As a preferred embodiment, a support ring is fixed on the U-shaped pressure gauge above the exhaust pipe, a connecting female cone is sleeved on the U-shaped pressure gauge above the support ring, a sealing cone surface matching the connecting female cone is provided at the bottom of the air-permeable cylinder, and a sealing ring is provided in the inner hole at the lower part of the connecting female cone. The connecting female cone and the U-shaped pressure gauge are split-type designs, and the connecting female cone can be replaced separately after being damaged, without replacing the U-shaped pressure gauge or re-adjusting the initial height of the liquid level.
[0006] As a preferred embodiment, an exhaust plane is provided on the outer wall of the tamping device to facilitate exhaust.
[0007] As a preferred embodiment, a perforated plate is supported in the lower inner hole of the air-permeable cylinder, and two layers of filter paper are arranged above the perforated plate.
[0008] As a preferred embodiment, the outer end of the exhaust pipe is connected to a connecting hose, and the other end of the connecting hose is connected to an exhaust device, so as to facilitate the connection of the exhaust equipment.
[0009] The utility model has the following beneficial effects:
[0010] It adopts the principle of light refraction and has the characteristics of high precision, easy use, automatic calculation of test results and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0012] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;
[0013] In the figure: 1. tamper, 2. exhaust plane, 3. breathable cylinder, 4. connecting female cone, 5. filter paper, 6. perforated plate, 7. cement to be tested, 8. support ring, 9. sealing ring, 10. valve, 11. connecting hose, 12. exhaust pipe, 13. laser beam switch 2, 14. third scale, 15. second scale, 16. laser beam switch 1, 17. first scale, 18. laser diffuse reflection switch, 19. U-shaped pressure gauge. DETAILED DESCRIPTION
[0014] The utility model is further described below in conjunction with embodiments.
[0015] Embodiment 1, as Figure 1 to Figure 2 As shown, the utility model is a high-precision automatic Blaine permeation instrument, comprising a permeation cylinder 3, a tamper 1, and a U-shaped pressure gauge 19. The upper end of the U-shaped pressure gauge 19 is connected to an exhaust pipe 12, and the exhaust pipe 12 is provided with a valve 10. The U-shaped pressure gauge 19 is provided with a first scale 17, a second scale 15 and a third scale 14 from bottom to top. Laser diffuse reflection switches 18 are provided on both sides of the first scale 17, laser beam switches 16 are provided on both sides of the second scale 15, and laser beam switches 13 are provided on both sides of the third scale 14. The laser diffuse reflection switch 18, the laser beam switch 16 and the laser beam switch 13 are connected to a single-chip microcomputer, and a timer and a calculator are provided in the single-chip microcomputer.
[0016] During operation, put the cement 7 to be tested into the air-permeable cylinder 3, and then compact the cement 7 to be tested with the tamping device 1, and then apply a thin layer of piston grease to the lower conical surface of the air-permeable cylinder 3, and then insert it into the conical ground mouth of the top of the U-shaped pressure gauge 19, and rotate it 1-2 circles. It is necessary to ensure a tight connection without leakage. Open the valve 10, and evacuate the air at the exhaust pipe 12 until the laser beam switch 13 detects that the concave meniscus of the liquid in the U-shaped pressure gauge 19 rises to the third scale 14 and stops, and then the timing is started. When the laser beam switch 16 detects that the concave meniscus of the liquid in the U-shaped pressure gauge 19 drops to the second scale 15, the timing is stopped, and the time required for the liquid level to move from the first scale line to the second scale line is recorded, and then the calculation result is transmitted to the single-chip microcomputer for display.
[0017] Embodiment 2, on the basis of embodiment 1, the U-shaped pressure gauge 19 and the connecting female cone 4 are currently an integral whole. During the detection process, if the air-permeable cylinder 3 is installed too tightly, it is easy to not be taken down, and excessive force will damage the connecting female cone 4, causing the U-shaped pressure gauge 19 to be scrapped. After damage, a professional is required to replace the U-shaped pressure gauge 19. Since it is necessary to ensure air tightness, the various parts are connected very tightly, and the ring is easily damaged during the replacement process. After the maintenance is completed, it is necessary to re-calibrate, which generally takes 5-10 working days to complete the calibration. Therefore, each maintenance is very time-consuming and the comprehensive maintenance cost is high. Therefore, a support ring 8 is fixed on the U-shaped pressure gauge 19 above the exhaust pipe 12, and a connecting female cone 4 is sleeved on the U-shaped pressure gauge 19 above the support ring 8. The bottom of the air-permeable cylinder 3 is provided with a sealing cone surface that cooperates with the connecting female cone 4, and a sealing ring 9 is provided in the lower inner hole of the connecting female cone 4. After damage, only the local connecting female cone 4 accessories need to be simply replaced without maintenance and re-calibration. Before operation, the initial position of the page is detected by the laser diffuse reflection switch 18 .
[0018] An exhaust plane 2 is provided on the outer wall of the tamping device 1 .
[0019] A perforated plate 6 is supported in the inner hole of the lower part of the air-permeable cylinder 3, and two layers of filter paper 5 are arranged above the perforated plate 6. When filling the cement 7 to be tested, the perforated plate 6 is first placed in the air-permeable cylinder 3, and then a layer of filter paper 5 is placed above the perforated plate 6, and then the cement 7 to be tested is filled, and then another layer of filter paper 5 is placed, and the cement 7 to be tested is compacted by using a tamper 1.
[0020] The outer end of the air extraction pipe 12 is connected to a connecting hose 11, and the other end of the connecting hose 11 is connected to an air extraction device, which is a micro electromagnetic pump.
[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
[0022] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.
Claims
1. A high-precision automatic Blaine permeation instrument, comprising a permeation cylinder (3), a tamper (1), and a U-shaped pressure gauge (19), wherein the upper end of the U-shaped pressure gauge (19) is connected to a suction pipe (12), and a valve (10) is provided on the suction pipe (12), characterized in that: The U-shaped pressure gauge (19) is provided with a first scale (17), a second scale (15) and a third scale (14) in sequence from bottom to top; a laser diffuse reflection switch (18) is provided on both sides of the first scale (17); a laser opposite-beam switch 1 (16) is provided on both sides of the second scale (15); a laser opposite-beam switch 2 (13) is provided on both sides of the third scale (14); and the laser diffuse reflection switch (18), the laser opposite-beam switch 1 (16) and the laser opposite-beam switch 2 (13) are connected to a single-chip microcomputer.
2. The high-precision automatic Blaine breather according to claim 1, characterized in that: A support ring (8) is fixed on the U-shaped pressure gauge (19) above the exhaust pipe (12), a connecting female cone (4) is sleeved on the U-shaped pressure gauge (19) above the support ring (8), a sealing cone surface matching the connecting female cone (4) is provided at the bottom of the air-permeable cylinder (3), and a sealing ring (9) is provided in the inner hole at the bottom of the connecting female cone (4).
3. The high-precision automatic Blaine breather according to claim 1, characterized in that: An exhaust plane (2) is provided on the outer wall of the tamping device (1).
4. The high-precision automatic Blaine breather according to claim 1, characterized in that: A perforated plate (6) is supported in the lower inner hole of the air-permeable cylinder (3), and two layers of filter paper (5) are arranged above the perforated plate (6).
5. The high-precision automatic Blaine breather according to claim 4, characterized in that: The outer end of the air extraction pipe (12) is connected to a connecting hose (11), and the other end of the connecting hose (11) is connected to an air extraction device.