Testing device for stone rate of goaf grouting material

Abstract

The utility model discloses a testing device for the stone rate of a goaf grouting material. The testing device comprises a test cylinder, a compensation cylinder, a sample cylinder, a guide pipe, an air compressor, a heating sleeve and a control valve, the compensation cylinder and the test cylinder are communicated through a conduit, the same indicator is filled in the compensation cylinder and the test cylinder, a control valve is arranged on the conduit, and the compensation cylinder is connected with an air compressor; an exhaust hole is formed in a cylinder cover of the test cylinder, and a one-way permeable membrane is adhered to the inner side of the exhaust hole; the heating sleeve wraps the outer wall of the test cylinder, and the sample cylinder is arranged in the test cylinder. The device for testing the stone rate of the grouting material in the goaf, which is designed on the basis of the Archimedes drainage method principle, has the advantages of simplicity in operation and high accuracy, and can solve the problems that the volume variation of slurry in multiple directions cannot be accurately measured and reading errors are caused by manual operation in the prior art.

Description

Technical Field

[0001] This utility model belongs to the technical field of solidification rate testing device preparation, specifically relating to a testing device for the stone-forming rate of grouting materials in goaf areas. Background Technology

[0002] Goaf areas created by underground coal mining pose a significant threat to the construction and safe use of highways and other surface structures. Engineering practice has shown that grouting remains the most common method for goaf remediation. Grouting involves injecting a prepared grout into the soil and rock mass using appropriate equipment. The grout is fluid when freshly prepared, but gradually hardens and solidifies into a strong, consolidated body upon reaching the voids, fissures, or pores within the soil and rock mass. This consolidated body bonds with the original soil and rock mass, forming a unified whole, thereby improving the bearing capacity and impermeability of the soil and rock mass and controlling its deformation. Currently, cement-based grouting materials are primarily used for goaf grouting.

[0003] Grouting in goaf areas primarily aims to fill cavities and fissures in the goaf and its overlying rock. The requirements for the fineness and strength of the grout material are relatively low, classifying it as a filling-type grouting. Therefore, the stone-forming rate of the cement grout directly impacts the filling rate of the goaf. Previously, testing the stone-forming rate of grouting materials in goaf areas mainly involved sedimentation and consolidation in small-diameter, watertight containers (such as graduated cylinders) with graduations. This method relied on manual reading, resulting in low accuracy of the solidification rate, and the stone-forming grout was difficult to remove from the container after testing. Utility Model Content

[0004] To overcome the shortcomings of the existing technology and solve the problem of low accuracy in manually detecting the stone-forming rate of grout in goaf treatment, this utility model provides a testing device for the stone-forming rate of grouting materials in goaf. This testing device is simple to operate and improves the measurement accuracy of grout stone forming rate by utilizing the principle of Archimedes' drainage method.

[0005] The aforementioned testing device for the stone-setting rate of grouting materials in goaf areas includes a test cylinder, a compensation cylinder, a sample cylinder, a guide tube, an air compressor, a heating jacket, and a control valve. The compensation cylinder and the test cylinder are connected by a guide tube, and both contain the same indicator. A control valve is installed on the guide tube, and the compensation cylinder is connected to the air compressor. An exhaust hole is opened on the cover of the test cylinder, and a one-way permeable membrane is glued to the inside of the exhaust hole. The outer wall of the test cylinder is wrapped with a heating jacket, and the sample cylinder is placed inside the test cylinder.

[0006] The indicator is ethylene glycol and / or glycerol.

[0007] The compensation cylinder is a stainless steel cylindrical tube with a diameter of φ100mm×150mm and a wall thickness of 0.5-1mm.

[0008] The conduit is a stainless steel pressure-bearing pipe with a diameter of 5-10mm.

[0009] The test cylinder is a stainless steel cylindrical tube with a diameter of φ200mm×350mm and a wall thickness of 0.5-1mm.

[0010] Four vent holes, each 50 mm in diameter, are evenly distributed on the cover of the test cylinder. The distance between the centers of two adjacent vent holes is 100 mm.

[0011] The unidirectional permeation membrane is a cellulose acetate membrane, an aromatic polyhydrazide membrane, or an aromatic polyamide membrane, with a surface micropore diameter of 0.5 nm to 10 nm.

[0012] The upper and lower caps of the sample tube are sealed and opened at timed intervals via electromagnetic points.

[0013] The sample tube is a cylindrical metal tube with a diameter of φ100mm×100mm and a wall thickness of 10mm.

[0014] The testing device is equipped with a stainless steel or PVC protective cover.

[0015] This utility model, based on the Archimedes drainage method, is a testing device for the stone-forming rate of grouting materials in goaf areas. It has the advantages of simple operation and high accuracy, and can solve the problems of existing technologies being unable to accurately measure the volume change of grout in multiple directions and the errors in manual operation readings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a testing device for the stone settling rate of grouting materials used in goaf areas.

[0017] Figure 2 This is a diagram showing the distribution of vent holes on the test cylinder cover;

[0018] Figure 3 This is a schematic diagram of the sample cylinder cap;

[0019] in, Air compressor , protective shield Indicators ,catheter, vent, , test cylinder Compensation cylinder One-way osmosis membrane Control valve , cylinder lid , sample tube, Stones Heating jacket, ,control Panel, Electromagnetic sites. Detailed Implementation

[0020] Example 1

[0021] like Figure 1 As shown, the testing device for the stone-forming rate of grouting materials in goaf areas includes a test cylinder, a compensation cylinder, a sample cylinder, a guide tube, an air compressor, a heating jacket, and a control valve. The compensation cylinder and the test cylinder are connected by a guide tube, and both contain the same indicator, glycerol. A control valve is installed on the guide tube, and the compensation cylinder is connected to the air compressor. The test cylinder has four vent holes with a diameter of 50 mm, evenly distributed on the cylinder cover. The distance between the centers of two adjacent vent holes is 100 mm. A cellulose acetate membrane with a micropore diameter of 1 nm is glued to the inner side of the vent holes. The outer wall of the test cylinder is wrapped with a heating jacket, and the sample cylinder is placed inside the test cylinder.

[0022] The compensation cylinder is a φ100mm×150mm stainless steel cylindrical tube with a wall thickness of 1mm. The conduit is a stainless steel pressure-bearing pipe with a diameter of 8mm. The test cylinder is a φ200mm×350mm stainless steel cylindrical tube with a wall thickness of 1mm. The sample cylinder is a φ100mm×100mm cylindrical stainless steel cylinder with a wall thickness of 10mm.

[0023] Four electromagnetic points are installed between the upper and lower caps and the body of the sample tube, which use magnetic attraction to seal and open at timed intervals. The caps are powered by built-in rechargeable batteries and have a waterproof control panel for setting the automatic opening time.

[0024] The testing device is equipped with a stainless steel protective cover with dimensions of 800mm*800mm*800mm.

[0025] The above-mentioned testing device is used as follows: First, close the bottom cover of the sample cylinder, fill it with slurry, then close the top cover and set a timer. Set the heating jacket to a constant curing temperature. After the slurry hydration and solidification reaction is complete, open both the upper and lower timed covers. Simultaneously, open the control valves of the air compressor and conduit to maintain the pressure inside the compensation cylinder at 1.2-1.5 atmospheres. The heating jacket raises the temperature, causing the slurry to hydrate and excess free water to vaporize and be discharged through the exhaust port of the test cylinder. The indicator in the compensation cylinder is replenished by the air compressor to fill the space reduced by the slurry hydration and free water vaporization. By recording the change in the volume of the indicator in the compensation cylinder, the change in volume before and after the slurry hydration reaction can be accurately reflected, thus allowing for accurate calculation of the slurry's stone formation rate. After the experiment, open both the upper and lower covers of the sample cylinder to facilitate the removal of the stone.

Claims

1. A testing device for the stone-setting rate of grouting materials in goaf areas, characterized in that, The testing device includes a test cylinder, a compensation cylinder, a sample cylinder, a conduit, an air compressor, a heating jacket, and a control valve. The compensation cylinder and the test cylinder are connected by a conduit, and both contain the same indicator. A control valve is installed on the conduit, and the compensation cylinder is connected to the air compressor. An exhaust hole is opened on the cover of the test cylinder, and a one-way permeation membrane is glued to the inside of the exhaust hole. The outer wall of the test cylinder is wrapped with a heating jacket, and the sample cylinder is placed inside the test cylinder.

2. The testing apparatus according to claim 1, characterized in that, The indicator is ethylene glycol and / or glycerol.

3. The testing apparatus according to claim 1, characterized in that, The compensation cylinder is a stainless steel cylindrical tube with a diameter of φ100mm×150mm and a wall thickness of 0.5-1mm.

4. The testing apparatus according to claim 1, characterized in that, The conduit is a stainless steel pressure-bearing pipe with a diameter of 5-10mm.

5. The testing apparatus according to claim 1, characterized in that, The test cylinder is a stainless steel cylindrical tube with a diameter of φ200mm×350mm and a wall thickness of 0.5-1mm.

6. The testing apparatus according to claim 1, characterized in that, Four vent holes, each 50 mm in diameter, are evenly distributed on the cover of the test cylinder. The distance between the centers of two adjacent vent holes is 100 mm.

7. The testing apparatus according to claim 1, characterized in that, The unidirectional permeation membrane is a cellulose acetate membrane, an aromatic polyhydrazide membrane, or an aromatic polyamide membrane, with a surface micropore diameter of 0.5 nm to 10 nm.

8. The testing apparatus according to claim 1, characterized in that, The upper and lower caps of the sample tube are sealed and opened at timed intervals via electromagnetic points.

9. The testing apparatus according to claim 1, characterized in that, The sample tube is a cylindrical metal tube with a diameter of φ100mm×100mm and a wall thickness of 10mm.

10. The testing apparatus according to claim 1, characterized in that, The testing device is equipped with a stainless steel or PVC protective cover.

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