Device for testing bleeding performance of cement-based slurry in high-pressure environment

Abstract

The utility model discloses a device for testing the bleeding performance of cement-based slurry in a high-pressure environment, which comprises a transparent cylinder body, a base, a pressing plate, connecting rods, an air compressor and a voltage stabilizer, the transparent cylinder body with an open upper end and a closed lower end is arranged on the base, the pressing plate is arranged on the transparent cylinder body and is connected with the base through a plurality of connecting rods, and the air compressor is connected with the voltage stabilizer through the connecting rods. The lower portion of the pressing plate is in sealed connection with the upper end of the transparent barrel, a high-pressure gas outlet of the air compressor is connected with the first end of the two ends of the high-pressure gas pipe, the second end of the two ends of the high-pressure gas pipe penetrates through a pressing plate pressurizing through hole in the pressing plate and is arranged in the transparent barrel, the high-pressure gas pipe is in sealed connection with the pressing plate, and the pressure stabilizer is installed on the high-pressure gas pipe. According to the high-pressure gas filling device, stable high-pressure gas can be filled into the transparent cylinder filled with the cement-based slurry, so that the cement-based slurry is in different high-pressure environments consistent with the actual environment, and the stability and adaptability of the cement-based slurry in different pressure environments can be conveniently analyzed.

Description

Technical Field

[0001] This utility model relates to a cement-based slurry performance testing device, and more particularly to a cement-based slurry water separation performance testing device under high pressure. Background Technology

[0002] In coal mines, tunnels, and other engineering projects, high-pressure gases and water bodies may be present in the strata. When cement-based grouts are used for strata reinforcement or to seal gases and water bodies, the grouts will be subjected to high pressure. However, the difference in the performance of grouts under normal pressure and high pressure is not clear.

[0003] Among the various properties of cement-based grout, water separation represents its stability. After the cement-based grout is mixed, solid particles settle, and a boundary water layer exists on top; this process is called water separation. The more water separation occurs, and the faster the water separation process, the worse the stability of the cement-based grout, and the less favorable it is for engineering applications.

[0004] Traditional cement-based slurry water separation performance test equipment is relatively simple. Generally, the cement-based slurry is simply placed in a transparent container, and the amount and time of water separation are observed to understand the water separation performance of the cement-based slurry.

[0005] However, under high pressure, the pressure may alter the stability of cement-based grout. Therefore, it is essential to determine the amount and process of water separation in cement-based grout under different pressure conditions to understand its stability and adaptability under varying pressure. The aforementioned traditional cement-based grout water separation performance testing apparatus is insufficient to meet the requirements for testing the water separation performance of cement-based grout under different pressure conditions. Utility Model Content

[0006] The purpose of this invention is to provide a test device for the water separation performance of cement-based slurry under high pressure to solve the above-mentioned problems.

[0007] This utility model achieves the above objectives through the following technical solutions:

[0008] A test device for the water separation performance of cement-based slurry under high pressure includes a transparent cylinder for containing cement-based slurry, a base, a pressure plate, connecting rods, an air compressor, and a pressure stabilizer. The transparent cylinder, which is vertically oriented and open at the top and closed at the bottom, is placed on top of the base. The horizontally oriented pressure plate is placed on top of the transparent cylinder and connected to the base via multiple vertical connecting rods. The bottom of the pressure plate is sealed to the top of the transparent cylinder. The high-pressure gas outlet of the air compressor is connected to a first end of a high-pressure gas pipe. The second end of the high-pressure gas pipe passes through a pressure plate pressurization through-hole on the pressure plate and is placed inside the transparent cylinder. The high-pressure gas pipe is sealed to the pressure plate. The pressure stabilizer, used to stabilize the high-pressure gas pressure, is installed on the high-pressure gas pipe.

[0009] Preferably, to facilitate quick and reliable connection of the pressure plate and the base via the connecting rod, the base has four vertically distributed base connecting screw holes evenly distributed along the circumference at the outer periphery of the lower end of the transparent cylinder. The pressure plate has vertical pressure plate connecting through holes directly above the four base connecting screw holes. The upper and lower ends of the connecting rod have connecting rod threaded sections that extend upward and downward respectively, with a reduced outer diameter and external threads. The diameters of the pressure plate connecting through holes and the base connecting screw holes are both larger than the outer diameter of the connecting rod threaded sections and smaller than the outer diameter of the connecting rod. The connecting rod threaded sections at the lower ends of the four connecting rods are connected to the four base connecting screw holes, and the connecting rod threaded sections at the upper ends of the four connecting rods pass through the four pressure plate connecting through holes and are connected to connecting nuts.

[0010] Preferably, in order to achieve a sealed connection between the pressure plate and the transparent cylinder, the lower part of the pressure plate is provided with an annular groove corresponding to the position of the transparent cylinder, and an annular sealing ring is provided in the annular groove. The upper end of the transparent cylinder is placed in the annular groove and presses the annular sealing ring.

[0011] Preferably, in order to achieve a sealed connection between the high-pressure air pipe and the pressure plate, an external thread is provided on the outer circumference of the high-pressure air pipe near the second end to form an external thread section of the air pipe. The external thread section of the air pipe passes through the pressure through hole of the pressure plate. A sealing gasket and a locking nut are respectively fitted on the external thread section of the air pipe at the positions above and below the pressure plate, and the two sealing gaskets are located between the two locking nuts.

[0012] Preferably, in order to record and preserve the water separation process for better observation and research, the cement-based slurry water separation performance test device under high pressure also includes a camera. The base is provided with a vertical camera mounting screw hole. The lower end of the vertical first mounting rod is placed in the camera mounting screw hole and threaded. The upper end of the first mounting rod and the lower end of the vertical second mounting rod are fitted together. The upper end of the second mounting rod is connected to a horizontal mounting plate. The camera is mounted on the mounting plate and aligned with the transparent cylinder.

[0013] Preferably, in order to realize the function of vertical position adjustment of the camera, the first mounting rod is provided with a blind hole with an open top and a closed bottom, and the lower end of the second mounting rod is placed in the blind hole. The first mounting rod is provided with a first positioning through hole near the upper end, and the second mounting rod is provided with a plurality of vertically arranged second positioning through holes. The pin passes through the first positioning through hole and one of the second positioning through holes.

[0014] Preferably, in order to more intuitively understand and analyze the water separation performance, the outer wall of the transparent cylinder is provided with vertically arranged scale lines on the side corresponding to the camera.

[0015] Preferably, in order to position the lower end of the transparent cylinder and better protect it from damage under pressure, a groove is provided on the upper part of the base corresponding to the position of the transparent cylinder, and a flexible pad is provided in the groove, with the lower end of the transparent cylinder placed on the flexible pad.

[0016] Preferably, in order to improve the strength of the transparent cylinder and have good transparency, the transparent cylinder is an plexiglass cylinder.

[0017] Preferably, in order to more intuitively observe the air pressure inside the transparent cylinder, a pressure measuring tube with a closed, suspended end is connected to the upper outer wall of the transparent cylinder, and a pressure gauge is installed on the pressure measuring tube.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention, through the design of a transparent cylinder, base, pressure plate, connecting rod, air compressor, and pressure stabilizer that work together, can fill a transparent cylinder containing cement-based slurry with stable high-pressure gas, placing the cement-based slurry in different high-pressure environments consistent with the actual environment. This facilitates the analysis of the stability and adaptability of the cement-based slurry under different pressure environments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the cement-based slurry water separation performance test device under high pressure environment described in this utility model. The transparent cylinder in the figure is a perspective effect.

[0021] Figure 2 This is a top view of the base of the test device for water separation performance of cement-based slurry under high pressure environment described in this utility model;

[0022] Figure 3 This is a bottom view of the pressure plate of the cement-based slurry water separation performance test device under high pressure environment described in this utility model;

[0023] Figure 4 This is a front view structural schematic diagram of the connecting rod of the cement-based slurry water separation performance test device under high pressure environment described in this utility model. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figures 1-4As shown, the cement-based slurry water separation performance test device under high pressure environment of this utility model includes a transparent cylinder 11 for loading cement-based slurry, a base 19, a pressure plate 9, a connecting rod 5, an air compressor 20, and a pressure stabilizer 10. The transparent cylinder 11, which is vertical in axis and open at the top and closed at the bottom, is placed on the base 19. The horizontal pressure plate 9 is placed on the transparent cylinder 11 and connected to the base 19 through multiple vertical connecting rods 5. The bottom of the pressure plate 9 is sealed to the top of the transparent cylinder 11. The high-pressure gas outlet of the air compressor 20 is connected to the first end of the two ends of the high-pressure gas pipe 8. The second end of the two ends of the high-pressure gas pipe 8 passes through the pressure plate pressurization through hole 27 on the pressure plate 9 and is placed inside the transparent cylinder 11. The high-pressure gas pipe 8 is sealed to the pressure plate 9. The pressure stabilizer 10, which is used to stabilize the high-pressure gas pressure, is installed on the high-pressure gas pipe 8.

[0026] like Figures 1-4 As shown, this utility model also illustrates the following more optimized specific structures:

[0027] To facilitate quick and reliable connection between the pressure plate 9 and the base 19 via the connecting rod 5, the base 19 has four vertically distributed base connection screw holes 21 on its upper surface, located on the outer periphery of the lower end of the transparent cylinder 11. The pressure plate 9 has vertical pressure plate connection through holes 25 located directly above the four base connection screw holes 21. The upper and lower ends of the connecting rod 5 have connecting rod threaded sections 3 that extend upward and downward respectively, with a reduced outer diameter and external threads. The diameter of the pressure plate connection through holes 25 and the diameter of the base connection screw holes 21 are both larger than the outer diameter of the connecting rod threaded sections 3 and smaller than the outer diameter of the connecting rod 5. The connecting rod threaded sections 3 at the lower ends of the four connecting rods 5 are connected to the four base connection screw holes 21 respectively. The connecting rod threaded sections 3 at the upper ends of the four connecting rods 5 pass through the four pressure plate connection through holes 25 and are connected to the connecting nuts 4 (a washer, not marked in the figure, is also provided below the connecting nuts 4).

[0028] In order to achieve a sealed connection between the pressure plate 9 and the transparent cylinder 11, an annular groove 26 is provided on the lower part of the pressure plate 9 at the position corresponding to the transparent cylinder 11, and an annular sealing ring (not shown in the figure) is provided in the annular groove 26. The upper end of the transparent cylinder 11 is placed in the annular groove 26 and the annular sealing ring is pressed tightly.

[0029] To achieve a sealed connection between the high-pressure air pipe 8 and the pressure plate 9, an external thread is provided on the outer circumference of the high-pressure air pipe 8 near the second end to form an external thread section of the air pipe (not marked in the figure; this external thread section can also be a connecting threaded pipe connected to the high-pressure air pipe 8). The external thread section of the air pipe passes through the pressure through hole 27 of the pressure plate. Sealing gaskets 7 and locking nuts 6 are respectively fitted on the external thread section of the air pipe at positions above and below the pressure plate 9, with the two sealing gaskets 7 located between the two locking nuts 6.

[0030] To record and preserve the water separation process for better observation and research, the high-pressure environment cement-based slurry water separation performance test device also includes a camera 13. The base 19 has a vertical camera mounting screw hole 24 on its top. The lower end of the vertical first mounting rod 18 is placed in the camera mounting screw hole 24 and threaded. The upper end of the first mounting rod 18 and the lower end of the vertical second mounting rod 15 are connected by an inner and outer sleeve. The upper end of the second mounting rod 15 is connected to a horizontal mounting plate 14. The camera 13 is mounted on the mounting plate 14 and aligned with the transparent cylinder 11.

[0031] In order to realize the function of vertical position adjustment of camera 13, the first mounting rod 18 is provided with a blind hole with an open top and a closed bottom, and the lower end of the second mounting rod 15 is placed in the blind hole. The first mounting rod 18 is provided with a first positioning through hole (not marked in the figure) near the upper end, and the second mounting rod 15 is provided with a plurality of vertically arranged second positioning through holes 16. The pin 17 passes through the first positioning through hole and one of the second positioning through holes 16.

[0032] To provide a more intuitive understanding and analysis of the water separation performance, vertically arranged scale lines 12 are provided on the outer wall of the transparent cylinder 11 on the side corresponding to the camera 13.

[0033] In order to position the lower end of the transparent cylinder 11 and better protect the transparent cylinder 11 from damage under pressure, a groove 22 is provided on the upper part of the base 19 at the position corresponding to the transparent cylinder 11, and a flexible pad 23 is provided in the groove 22. The lower end of the transparent cylinder 11 is placed on the flexible pad 23, which can be a rubber pad or the like.

[0034] To improve the strength of the transparent cylinder 11 and to provide good visibility, the transparent cylinder 11 is made of plexiglass.

[0035] To more intuitively observe the air pressure inside the transparent cylinder 11, a pressure measuring tube 1 with a closed, suspended end is connected to the upper outer wall of the transparent cylinder 11, and a pressure gauge 2 is installed on the pressure measuring tube 1.

[0036] like Figures 1-4As shown, during use, first, the cement-based slurry is poured into the transparent cylinder 11, with the slurry level positioned in the upper middle part of the cylinder 11. Then, the transparent cylinder 11 is placed on the flexible pad 23 on the base 19. The four connecting rods 5 are then threadedly connected to the base 19. Next, the pressure plate 9, which is already connected to the high-pressure air pipe 8, is fitted from top to bottom onto the upper end of the four connecting rods 5, placing the upper end of the transparent cylinder 11 into the annular groove 26. After locking the pressure plate 9 to the four connecting rods 5 with the four connecting nuts 4, the upper end of the transparent cylinder 11 presses against the annular sealing ring in the annular groove 26, achieving a sealed connection between the pressure plate 9 and the upper end of the transparent cylinder 11. Then, the air compressor 20 is started, and high-pressure gas is sent into the upper part of the transparent cylinder 11 at the set pressure, and the pressure is transmitted through the pressure gauge 2. Observe in real time until the air pressure inside the transparent cylinder 11 reaches the set value. At this time, the cement-based slurry is in a high-pressure environment consistent with the actual environment. Adjust the height of the camera 13 so that it is basically aligned with the liquid surface of the cement-based slurry. Turn on the camera 13 and record and save the water separation process of the cement-based slurry inside the transparent cylinder 11 in real time. It can also be continuously observed by the staff. After a period of time, the cement-based slurry will slowly separate water. The separated water has a lower density and is at a higher level. Eventually, a dividing line will appear between the upper water layer and the lower cement-based slurry layer. When the dividing line is relatively clear, it can be judged that the water separation process is over. By comprehensively analyzing the water separation performance of the cement-based slurry through factors such as water separation amount and water separation time, a basis can be provided for its better application in construction.

[0037] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A test device for the water separation performance of cement-based slurry under high pressure, comprising a transparent cylinder for loading cement-based slurry, characterized in that: It also includes a base, a pressure plate, connecting rods, an air compressor, and a pressure stabilizer. The transparent cylinder, which is vertically oriented and open at the top and closed at the bottom, is placed on top of the base. The horizontal pressure plate is placed on top of the transparent cylinder and connected to the base through multiple vertical connecting rods. The bottom of the pressure plate is sealed to the top of the transparent cylinder. The high-pressure gas outlet of the air compressor is connected to the first end of the high-pressure gas pipe. The second end of the high-pressure gas pipe passes through the pressure plate pressurization through hole on the pressure plate and is placed inside the transparent cylinder. The high-pressure gas pipe is sealed to the pressure plate. The pressure stabilizer, used to stabilize the high-pressure gas pressure, is installed on the high-pressure gas pipe.

2. The test device for water separation performance of cement-based slurry under high pressure environment according to claim 1, characterized in that: The base has four vertically distributed base connecting screw holes evenly distributed along the circumference at the lower outer periphery of the transparent cylinder. The pressure plate has vertical pressure plate connecting through holes directly above the four base connecting screw holes. The upper and lower ends of the connecting rod have connecting rod threaded sections that extend upward and downward respectively, with a decreasing outer diameter and external threads. The diameter of the pressure plate connecting through holes and the diameter of the base connecting screw holes are both larger than the outer diameter of the connecting rod threaded sections and smaller than the outer diameter of the connecting rod. The connecting rod threaded sections at the lower ends of the four connecting rods are connected to the four base connecting screw holes respectively. The connecting rod threaded sections at the upper ends of the four connecting rods pass through the four pressure plate connecting through holes and are connected to connecting nuts.

3. The test apparatus for water separation performance of cement-based slurry under high pressure environment according to claim 1 or 2, characterized in that: The pressure plate has an annular groove at the position corresponding to the transparent cylinder, and an annular sealing ring is provided in the annular groove. The upper end of the transparent cylinder is placed in the annular groove and presses the annular sealing ring.

4. The test apparatus for water separation performance of cement-based slurry under high pressure environment according to claim 1 or 2, characterized in that: The high-pressure air pipe has an external thread on its outer circumference near the second end, forming an external thread section. The external thread section passes through the pressure through hole of the pressure plate. A sealing gasket and a locking nut are respectively fitted on the external thread section above and below the pressure plate, with the two sealing gaskets located between the two locking nuts.

5. The test apparatus for water separation performance of cement-based slurry under high pressure environment according to claim 1 or 2, characterized in that: The high-pressure environment cement-based slurry water separation performance test device also includes a camera. The base has a vertical camera mounting screw hole on its top. The lower end of the vertical first mounting rod is placed in the camera mounting screw hole and threaded. The upper end of the first mounting rod and the lower end of the vertical second mounting rod are fitted together. The upper end of the second mounting rod is connected to a horizontal mounting plate. The camera is mounted on the mounting plate and aligned with the transparent cylinder.

6. The test apparatus for water separation performance of cement-based slurry under high pressure environment according to claim 5, characterized in that: The first mounting rod has a blind hole with an open top and a closed bottom, and the lower end of the second mounting rod is placed inside the blind hole. The first mounting rod has a first positioning through hole near its upper end, and the second mounting rod has a plurality of vertically arranged second positioning through holes. The pin passes through the first positioning through hole and one of the second positioning through holes.

7. The test apparatus for water separation performance of cement-based slurry under high pressure environment according to claim 5, characterized in that: The outer wall of the transparent cylinder has vertically arranged scale lines on the side corresponding to the camera.

8. The test apparatus for water separation performance of cement-based slurry under high pressure environment according to claim 1 or 2, characterized in that: The base has a groove on its upper surface corresponding to the transparent cylinder, and a flexible pad is provided in the groove. The lower end of the transparent cylinder is placed on the flexible pad.

9. The test apparatus for water separation performance of cement-based slurry under high pressure environment according to claim 1 or 2, characterized in that: The transparent cylinder is made of plexiglass.

10. The test apparatus for water separation performance of cement-based slurry under high pressure environment according to claim 1 or 2, characterized in that: The upper outer wall of the transparent cylinder is connected to a pressure measuring tube with a closed, suspended end, and a pressure gauge is installed on the pressure measuring tube.

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