Automatic detection device for relative density of underground engineering slurry

Abstract

The invention relates to an underground engineering mud relative density automatic detection device which comprises a U-shaped pipe of a transparent structure, sealing covers are arranged at the two ends of the U-shaped pipe respectively, and a first displacement sensor and a second displacement sensor which are used for detecting liquid level changes of the two sides of the U-shaped pipe are arranged on the sealing covers on the two sides respectively. The first displacement sensor and the second displacement sensor are connected with the processor; the U-shaped pipe is filled with a water medium to form a water column, and piston floating blocks matched with the inner wall of the U-shaped pipe are arranged at the two ends of the water column respectively. One side of the U-shaped pipe is provided with a slurry injection port, and the other side is provided with an exhaust port; the U-shaped pipe is fixed to the clamp, to-be-detected slurry is injected into the slurry injection port, a slurry column is formed on the piston floating block on the side where the slurry is injected, the first displacement sensor and the second displacement sensor detect liquid level change values before and after grouting, and the liquid level change values are guided into a slurry relative density formula to obtain the relative density of the slurry. The structure is simple, the method is simple and easy to implement, precision is high, and the situation that measurement errors are caused by mud precipitation is avoided.

Description

Technical Field

[0001] The invention relates to an underground engineering mud detection device, in particular to an underground engineering mud relative density detection device. Background Art

[0002] Underground engineering mud is one of the factors to ensure the stability of underground continuous wall trench wall during underground continuous wall construction. The performance of underground engineering mud directly affects the construction of underground continuous wall. The density of underground engineering mud relative to water is one of the important indicators to determine the performance of underground engineering mud. The existing method generally directly measures the density of mud and evaluates the relative density of mud. However, since mud is easy to precipitate and form a density gradient, mud precipitation occurs when detecting density, resulting in large measurement errors, which affects the evaluation of underground engineering mud performance. Summary of the invention

[0003] The purpose of the present invention is to solve the disadvantage of large measurement error in the prior art, and to propose an automatic detection device for relative density of underground engineering mud. The automatic detection device for relative density of underground engineering mud can automatically read the relative density of underground engineering mud. The method is simple and easy to operate, with high accuracy, and there will be no measurement error caused by mud sedimentation.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An automatic detection device for relative density of mud in underground engineering, comprising a U-shaped tube with a transparent structure, wherein both ends of the U-shaped tube are respectively provided with sealing covers, and the sealing covers on both sides are respectively provided with a first displacement sensor and a second displacement sensor for detecting changes in liquid levels on both sides of the U-shaped tube, and the first displacement sensor and the second displacement sensor are connected to a processor; a water medium is filled in the U-shaped tube to form a water column, and piston floats matching the inner wall of the U-shaped tube are respectively arranged at both ends of the water column; a mud injection port is arranged on one side of the U-shaped tube, and an exhaust port is arranged on the other side; the U-shaped tube is fixed on a clamp, and mud to be tested is injected from the mud injection port, and a mud column is formed on the piston float on the side where the mud is injected, and the first displacement sensor and the second displacement sensor detect the change value of the liquid level before and after grouting, and the mud relative density formula is introduced to obtain the relative density of the mud.

[0006] Furthermore, the sealing cover is connected to both sides of the U-shaped tube by embedding or threading, and the sealing cover, the first displacement sensor and the second displacement sensor are an integrated structure.

[0007] Furthermore, the height of the exhaust port is greater than the height of the mud injection port.

[0008] Furthermore, an oil film is provided on the inner wall of the U-shaped tube, so that the piston float is slidably arranged in the U-shaped tube.

[0009] Furthermore, the piston float is made of a hollow plastic part or a foam material, and can float on the liquid surface on both sides of the U-shaped tube 1.

[0010] Furthermore, the relative density formula of the mud is:

[0011]

[0012] Among them, h1 and h2 are the detection values ​​of the first displacement sensor and the second displacement sensor after the mud is added.

[0013] The beneficial effects of the present invention are:

[0014] The invention proposes an automatic detection device for the relative density of underground engineering mud, which is simple and easy to use, has high precision, and will not cause measurement errors due to mud sedimentation. On the one hand, it ensures the accuracy of underground engineering mud detection, and on the other hand, it is more convenient and easy to use during the measurement process. The invention adopts the automatic detection device for the relative density of underground engineering mud, which makes the detection method simple and easy to use, has high precision, and will not cause measurement errors due to mud sedimentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the automatic detection device for relative density of underground engineering mud of the present invention;

[0016] Figure 2 It is a schematic diagram of the internal structure of the automatic detection device for relative density of underground engineering mud of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of the present invention after the injection slurry is injected;

[0018] Markings in the figure are: 1. U-shaped tube; 11. Mud injection port; 12. Exhaust port; 2. Cover; 3. First displacement sensor; 4. Second displacement sensor; 5. Piston float; 6. Water column; 7. Mud column. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0020] The structural features of the present invention are now described in detail with reference to the accompanying drawings.

[0021] like Figures 1 to 3As shown, an automatic detection device for relative density of underground engineering mud of the present invention comprises a U-shaped tube 1 of a transparent structure, the U-shaped tube 1 is made of glass fiber reinforced plastic, and covers 2 are respectively provided at both ends of the U-shaped tube 1, and the covers 2 at both sides are respectively provided with a first displacement sensor 3 and a second displacement sensor 4 for detecting the change of the liquid level at both sides of the U-shaped tube 1, wherein the covers 2 are connected to both sides of the U-shaped tube 1 by embedding or threading, and the covers 2 and the first displacement sensor 3 and the second displacement sensor 4 are an integral structure, and the first displacement sensor 3 and the second displacement sensor 4 are respectively used to collect the liquid level values ​​at both sides of the U-shaped tube 1. The first displacement sensor 3 and the second displacement sensor 4 are connected to the processor.

[0022] The U-shaped tube 1 is filled with water medium to form a water column 6, and piston floats 5 of the same structure are respectively arranged at both ends of the water column 6. The piston floats 5 can be made of a hollow plastic part or a foam material, and have good floating performance, and can float on the liquid surface on both sides of the U-shaped tube 1. In order to enable the piston float 5 to slide smoothly in the U-shaped tube 1, an oil film is provided on the inner wall of the U-shaped tube 1, so that the piston float 5 is slidably arranged in the U-shaped tube 1. A mud injection port 11 is provided on one side of the U-shaped tube 1, and an exhaust port 12 is provided on the other side. The mud injection port 11 is used to inject sampling mud, and the exhaust port 12 is used to exhaust the gas on the right side of the U-shaped tube 1 to ensure pressure balance on both sides. Among them, the height of the exhaust port 12 is greater than the height of the mud injection port 11. Such a setting can effectively avoid overflow of the water column due to excessive injection of mud. During operation, the U-tube 1 is fixed on the fixture, the mud to be tested is injected from the mud injection port 11, and a mud column 7 is formed on the piston float 5 on the side where the mud is injected. The first displacement sensor 3 and the second displacement sensor 4 detect the change in liquid level before and after grouting, and the mud relative density formula is introduced to obtain the relative density of the mud.

[0023] The formula for relative density of mud is:

[0024]

[0025] Among them, h1 and h2 are the detection values ​​of the first displacement sensor 3 and the second displacement sensor 4 after the mud is added, respectively.

[0026] The automatic detection device for relative density of underground engineering mud of the present invention is simple, easy to use, and has high precision. It will not cause measurement errors due to mud sedimentation. On the one hand, it ensures the accuracy of underground engineering mud detection, and on the other hand, it is more convenient and easy to use during the measurement process.

[0027] Specifically, when in use, first inject a certain amount of water into the U-shaped tube 1 to form a water column 6, put in the piston float 5, clamp and fix the U-shaped tube 1 so that the liquid levels on both sides are level, the first displacement sensor 3 and the second displacement sensor 4 collect the liquid level height h0, inject the sampling mud, the first displacement sensor 3 and the second displacement sensor 4 collect the liquid level heights h1 and h2 on both sides respectively, and the collected values ​​are substituted into the mud relative density formula, and the mud relative density is directly calculated by the computer.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic detection device for relative density of underground engineering mud, comprising a U-shaped tube (1) with a transparent structure, characterized in that: The two ends of the U-shaped tube (1) are respectively provided with a cover (2), and the covers on both sides are respectively provided with a first displacement sensor (3) and a second displacement sensor (4) for detecting the change of the liquid level on both sides of the U-shaped tube (1), and the first displacement sensor (3) and the second displacement sensor (4) are connected to a processor; the U-shaped tube (1) is filled with water medium to form a water column (6), and piston floating blocks (5) matching the inner wall of the U-shaped tube (1) are respectively provided at both ends of the water column (6); a mud injection port (11) is provided on one side of the U-shaped tube (1), and an exhaust port (12) is provided on the other side; The U-shaped tube (1) is fixed on a fixture, and the mud to be tested is injected from the mud injection port (11), and a mud column (7) is formed on the piston float (5) on the side where the mud is injected. The first displacement sensor (3) and the second displacement sensor (4) detect the liquid level change value before and after the grouting, and the mud relative density formula is introduced to obtain the relative density of the mud.

2. The automatic detection device for relative density of underground engineering mud according to claim 1 is characterized in that: The sealing cover (2) is connected to both sides of the U-shaped tube (1) by embedding or threading, and the sealing cover (2) and the first displacement sensor (3) and the second displacement sensor (4) are an integrated structure.

3. The automatic detection device for relative density of underground engineering mud according to claim 1 is characterized in that: The height of the exhaust port (12) is greater than the height of the slurry injection port (11).

4. The automatic detection device for relative density of underground engineering mud according to claim 1 is characterized by: The inner wall of the U-shaped tube (1) is provided with an oil film, so that the piston float (5) is slidably arranged in the U-shaped tube (1).

5. The automatic detection device for relative density of underground engineering mud according to claim 1 is characterized by: The piston float (5) is made of a hollow plastic part or a foam material and can float on the liquid surface on both sides of the U-shaped tube 1.

6. The automatic detection device for relative density of underground engineering mud according to claim 1 is characterized by: The relative density formula of the mud is: Among them, h1 and h2 are the detection values ​​of the first displacement sensor and the second displacement sensor after the mud is added.

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