CN109061122B - Device and method for measuring slag carrying capacity of slurry - Google Patents
Device and method for measuring slag carrying capacity of slurry Download PDFInfo
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- CN109061122B CN109061122B CN201811139863.1A CN201811139863A CN109061122B CN 109061122 B CN109061122 B CN 109061122B CN 201811139863 A CN201811139863 A CN 201811139863A CN 109061122 B CN109061122 B CN 109061122B
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- 239000002002 slurry Substances 0.000 title claims abstract description 60
- 239000002893 slag Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 17
- 239000002689 soil Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012770 industrial material Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a device and a method for measuring the slag carrying capacity of slurry, wherein the device comprises a vacuum pump, a vacuum bottle, a measuring cylinder, a mixing cylinder and a slurry tank; the slurry tank is connected to the bottom of the mixing cylinder through a pipeline, the top of the mixing cylinder is communicated to the bottom of the measuring cylinder through a pipeline, the top of the measuring cylinder is communicated into the vacuum bottle through a pipeline, and the vacuum pump is correspondingly communicated with the vacuum bottle through an exhaust pipe; valves F5, F3 and F1 are respectively arranged on the pipelines between the mud tank and the mixing cylinder, between the mixing cylinder and the measuring cylinder and between the measuring cylinder and the vacuum bottle; the upper part of the measuring cylinder and the lower part of the mixing cylinder are respectively provided with a filter screen, and the upper part of the filter screen in the mixing cylinder is used for placing dregs to be mixed. The invention has simple structure and convenient operation, is suitable for carrying out a large number of comparison tests under laboratory conditions, and determines the influence of the mud slag carrying efficiency and main performance indexes of mud on the slag carrying capacity.
Description
Technical Field
The invention relates to the technical field of shield construction testing devices, in particular to a device and a method for measuring the mud carrying capacity of a slurry shield machine.
Background
The slurry is a semi-colloid suspension formed by mixing water, bentonite, clay and additives according to a certain proportion. In slurry shield construction, the circulation system conveys pressurized slurry to a slurry tank, a slurry film or a permeation area is formed on an excavation surface so as to balance soil pressure and water pressure of the excavation surface, and meanwhile, dregs cut by a cutter head and the slurry are mixed and discharged by the circulation system. The slurry plays an important role in stabilizing the excavation face and discharging slag, and thus, it is necessary to conduct intensive studies on the slurry properties from both the stabilization of the excavation face and the slag carrying capacity. At present, aiming at the process of forming a mud film by mud in tunneling, a specific test device is provided for the stability performance of a digging surface, the mud carrying capacity is mainly evaluated by means of indexes such as mud specific gravity, viscosity and the like, no special equipment is used for direct measurement, and the influence rule of the indexes such as specific gravity, viscosity and the like on the mud carrying capacity is not clear.
Disclosure of Invention
The invention aims to solve the technical problems that the sludge carrying capacity measuring device and the measuring method are not direct, and the influence effect of viscosity and specific gravity on the sludge carrying capacity is not clear.
In order to solve the technical problems, the invention adopts the following technical scheme:
the device for measuring the slag carrying capacity of the slurry comprises a vacuum pump, a vacuum bottle, a measuring cylinder, a mixing cylinder and a slurry tank;
the slurry tank is connected to the bottom of the mixing cylinder through a pipeline, the top of the mixing cylinder is communicated to the bottom of the measuring cylinder through a pipeline, the top of the measuring cylinder is communicated into the vacuum bottle through a pipeline, and the vacuum pump is correspondingly communicated with the vacuum bottle through an exhaust pipe; valves F5, F3 and F1 are respectively arranged on the pipelines between the mud tank and the mixing cylinder, between the mixing cylinder and the measuring cylinder and between the measuring cylinder and the vacuum bottle; the upper part of the measuring cylinder and the lower part of the mixing cylinder are respectively provided with a filter screen, and the upper part of the filter screen in the mixing cylinder is used for placing dregs to be mixed.
Preferably, the device further comprises a water tank for cleaning the device, the water tank is respectively communicated to the bottom of the mixing cylinder and the bottom of the measuring cylinder through pipelines, and valves F4 and F2 are respectively arranged between the water tank and the mixing cylinder and between the water tank and the measuring cylinder.
Preferably, the pipeline for communicating the vacuum bottle and the measuring cylinder is characterized in that one end port in the vacuum bottle extends to the bottom of the vacuum bottle, one end port in the measuring cylinder is positioned at the top end of the measuring cylinder, and the height of the port in the vacuum bottle is lower than that of the port in the measuring cylinder.
Preferably, the measuring cylinder 4 is made of transparent material, and scale marks are arranged on the wall of the measuring cylinder.
In the technical scheme, a certain amount of slurry is pre-filled in a slurry tank, negative pressure is formed in a vacuum bottle after a vacuum pump is started, the slurry in the slurry tank sequentially flows through a mixing cylinder and a measuring cylinder along a pipeline, a filter screen is arranged at the lower part in the mixing cylinder, the upper part of the filter screen is used for placing dregs, and the slurry flow flushes the dregs pre-filled in the bottle from bottom to top, so that the slurry and the dregs are automatically mixed, and the slurry carrying residue flow is realized; the measuring cylinder can realize the separation of mud and dregs and the measurement of the carrying quantity of the dregs, the mud mixed with the dregs flows out from the upper part of the mixing cylinder, flows in from the lower part of the measuring cylinder, the upper part of the measuring cylinder is provided with the filter screen, the dregs in the mixed mud are left in the measuring cylinder, and the liquid filtered by the filter screen flows into the vacuum bottle through the upper part of the measuring cylinder. And when the mud in the mud tank is completely flowed out, the ratio of the volume of the residue soil after standing and precipitating in the measuring cylinder to the volume of the mud in the mud tank is the slag carrying capacity of the mud. Through setting up the water pitcher, can also make this measuring device have cleaning function, once measure the back that finishes, can accomplish measuring device's washing through the switching valve, clear away surplus mud in order to do benefit to carrying out the measurement of next time.
The invention also relates to a method for measuring the slag carrying capacity of the slurry, which comprises the following steps:
(1) The mud carrying capacity measuring device is adopted for measuring, firstly, mud and dregs with preset proportions are prepared, a certain amount of mud is placed in a mud tank, the weighed dregs are placed on the upper part of a filter screen in a mixing drum, and the mud is filled; opening valves F3 and F5 on the slurry pipe, closing valves F2 and F4 on the water pipe, and correspondingly connecting all parts in the device;
(2) After the vacuum bottle is pumped to a certain vacuum degree, a valve F1 is opened, at the moment, mud starts to be carried by the mud tank through the mixing cylinder to enter the measuring cylinder, and the mud is filtered by the filter screen in the measuring cylinder and then is discharged into the vacuum bottle;
(3) When the slurry in the slurry tank is exhausted, valves F3 and F5 on the slurry pipe are closed, a water pipe valve F2 is opened, water in the water tank flows into the measuring cylinder, water in the measuring cylinder to be measured becomes clear, and the vacuum pump is closed;
(4) Standing the measuring cylinder for a period of time until the dregs are completely precipitated, directly reading the volume of the dregs in the measuring cylinder through the scale marks, and then calculating the ratio of the volume of the dregs to the volume of the consumed mud, namely the carrying capacity of the mud; or taking out the deposited slag soil in the measuring cylinder, drying, weighing, and calculating the ratio of the mass of the slag soil to the mass of the consumed slurry, namely the slag carrying capacity of the slurry.
(5) After the measurement is finished, the valves F1, F2, F3 and F4 and the vacuum pump are opened, the valve F5 is closed, and the water in the water tank washes the whole device for the next measurement.
The method for measuring the slag carrying capacity of the slurry provides two measuring modes of the slag carrying efficiency of the slurry, and can be used for carrying out instant estimation through the volume of the slag carrying soil and accurately measuring through drying and weighing the slag carrying soil.
The invention has the beneficial effects that:
according to the invention, by constructing the structure of the mud carrying capacity measuring device, the performance parameters of viscosity, specific gravity and the like of the mud, which influence the carrying capacity, can be subjected to experimental analysis, the main influencing factors of the mud carrying capacity are determined, experimental comparison is carried out on the carrying capacities of different proportions of mud, a selection basis is provided for the proportion of the mud of the shield or rotary drilling under different geological conditions, and good geological adaptability of the proportion of the mud is realized. The device for measuring the slag carrying capacity of the slurry has the advantages of simple structure and convenient operation, is suitable for carrying out a large number of comparison tests under laboratory conditions, and determines the influence of the slag carrying efficiency of the slurry and main performance indexes of the slurry on the slag carrying capacity.
Drawings
FIG. 1 is a schematic diagram of a device for measuring the slag carrying capacity of slurry according to the present invention.
Wherein 1 is a vacuum pump, 2 is a vacuum bottle, 3 is a filter screen of a measuring cylinder, 4 is a filter screen of a measuring cylinder, 5 is a filter screen of a mixing cylinder, 6 is a mixing cylinder, 7 is a water tank, 8 is a mud tank, and 9 is muck.
Detailed Description
The following examples are given to illustrate the invention in detail, but are not intended to limit the scope of the invention in any way.
Example 1: the device for measuring the slag carrying capacity of slurry comprises a vacuum pump 1, a vacuum bottle 2, a measuring cylinder 4, a mixing cylinder 5, a water tank 7 and a slurry tank 8, as shown in fig. 1.
The slurry tank 8 is connected to the bottom of the mixing drum 6 through a pipeline, the top of the mixing drum 6 is communicated to the bottom of the measuring drum 4 through a pipeline, the top of the measuring drum 4 is communicated into the vacuum bottle 2 through a pipeline, and the vacuum pump 1 is correspondingly communicated with the vacuum bottle 2 through an exhaust pipe; valves F5, F3 and F1 are respectively arranged on the pipelines between the mud tank 8 and the mixing cylinder 6, between the mixing cylinder 6 and the measuring cylinder 4 and between the measuring cylinder 4 and the vacuum bottle 2; the upper part of the measuring cylinder 4 is provided with a filter screen 3, the lower part of the mixing cylinder 6 is provided with a filter screen 5, and the upper part of the filter screen 5 of the mixing cylinder is used for placing dregs 9 to be mixed.
The water tank 7 is respectively communicated with the bottom of the mixing drum 6 and the bottom of the measuring drum 4 through pipelines, and valves F4 and F2 are respectively arranged between the water tank 7 and the mixing drum 6 and between the water tank 7 and the measuring drum 4.
Wherein, the pipeline of intercommunication vacuum bottle 2 and dipperstick 4, the one end port in vacuum bottle 2 extends to vacuum bottle 2 bottom, and the one end port in dipperstick 4 is located the top of dipperstick 4, and its port height in vacuum bottle 2 is less than the port height in dipperstick 4. The measuring cylinder 4 is made of transparent materials, and scale marks are arranged on the cylinder wall of the measuring cylinder 4.
Example 2: a method for measuring the slag carrying capacity of slurry comprises the following steps:
(1) The mud carrying capacity measuring device in the embodiment 1 is adopted for measurement, firstly, the mud and the dregs with preset proportion are prepared, a certain amount of mud is placed in a mud tank 8, and the weighed dregs 9 are placed on the upper part of a filter screen 5 in a mixing drum 6 and filled with the mud; opening valves F3 and F5 on the slurry pipe, closing valves F2 and F4 on the water pipe, and correspondingly connecting all parts in the device;
(2) After the vacuum pump 1 is started and the vacuum bottle 2 is pumped to a certain vacuum degree, the valve F1 is opened, at the moment, the slurry starts to be carried by the slurry tank 8 through the mixing drum 6, enters the measuring drum 4, is filtered by the filter screen 3 in the measuring drum 4 and is discharged into the vacuum bottle 2;
(3) When the slurry in the slurry tank 8 is exhausted, the valves F3 and F5 on the slurry pipe are closed, the water pipe valve F2 is opened, water in the water tank 7 flows into the measuring cylinder 4, the water in the measuring cylinder 4 to be measured becomes clear, and the vacuum pump 1 is closed;
(4) Standing the measuring cylinder 4 for a period of time until the dregs are completely precipitated, directly reading the volume of the dregs in the measuring cylinder through the scale marks, and then calculating the ratio of the volume of the dregs to the volume of the consumed mud, namely the carrying capacity of the mud; the method can rapidly measure the slag carrying capacity, but the measurement result has a certain error due to a certain gap in the slag soil.
Or taking out the deposited slag soil in the measuring cylinder 4, drying, weighing, and calculating the ratio of the mass of the slag soil to the mass of the consumed slurry, namely the slag carrying capacity of the slurry. The method can measure the actual quality of the muck with higher precision, but needs to process and weigh the muck, and has more operation flow. The measurement method can be selected according to the requirements to meet the requirements of precision and test efficiency.
(5) After the measurement is finished, the valves F1, F2, F3 and F4 and the vacuum pump are opened, the valve F5 is closed, and the water in the water tank washes the whole device for the next measurement.
The device elements referred to in the above embodiments are conventional device elements unless otherwise specified; the industrial materials are commercially available conventional industrial materials unless otherwise specified.
While the invention has been described with reference to the embodiments, those skilled in the art will understand that various specific parameters in the above embodiments may be changed without departing from the spirit of the invention, and thus a plurality of specific embodiments are common variation ranges of the invention, and will not be described in detail herein.
Claims (5)
1. The device for measuring the slag carrying capacity of the slurry is characterized by comprising a vacuum pump, a vacuum bottle, a measuring cylinder, a mixing cylinder and a slurry tank;
the slurry tank is connected to the bottom of the mixing cylinder through a pipeline, the top of the mixing cylinder is communicated to the bottom of the measuring cylinder through a pipeline, the top of the measuring cylinder is communicated into the vacuum bottle through a pipeline, and the vacuum pump is correspondingly communicated with the vacuum bottle through an exhaust pipe; valves F5, F3 and F1 are respectively arranged on the pipelines between the mud tank and the mixing cylinder, between the mixing cylinder and the measuring cylinder and between the measuring cylinder and the vacuum bottle; the upper part of the measuring cylinder and the lower part of the mixing cylinder are respectively provided with a filter screen, and the upper part of the filter screen in the mixing cylinder is used for placing dregs to be mixed.
2. The device for measuring the mud carrying capacity according to claim 1, further comprising a water tank for cleaning the device, wherein the water tank is respectively communicated to the bottom of the mixing cylinder and the bottom of the measuring cylinder through pipelines, and valves F4 and F2 are respectively arranged between the water tank and the mixing cylinder and between the water tank and the measuring cylinder.
3. The mud residue carrying capacity measurement device of claim 1, wherein a pipe connecting the vacuum bottle and the measurement cylinder has an end port in the vacuum bottle extending to a bottom of the vacuum bottle, an end port in the measurement cylinder being located at a top end of the measurement cylinder, and a port height in the vacuum bottle being lower than a port height in the measurement cylinder.
4. The device for measuring the slag carrying capacity of slurry according to claim 1, wherein the measuring cylinder is made of transparent materials, and graduation marks are arranged on the wall of the measuring cylinder.
5. The method for measuring the slag carrying capacity of the slurry is characterized by comprising the following steps of:
(1) The mud carrying capacity measuring device of claim 1 is adopted for measurement, firstly, mud and dregs with preset proportion are prepared, a certain amount of mud is placed in a mud tank, the weighed dregs are placed on the upper part of a filter screen in a mixing drum, and the mud is filled; opening valves F3 and F5 on the slurry pipe, closing valves F2 and F4 on the water pipe, and correspondingly connecting all parts in the device;
(2) After the vacuum bottle is pumped to a certain vacuum degree, a valve F1 is opened, at the moment, mud starts to be carried by the mud tank through the mixing cylinder to enter the measuring cylinder, and the mud is filtered by the filter screen in the measuring cylinder and then is discharged into the vacuum bottle;
(3) When the slurry in the slurry tank is exhausted, valves F3 and F5 on the slurry pipe are closed, a water pipe valve F2 is opened, water in the water tank flows into the measuring cylinder, water in the measuring cylinder to be measured becomes clear, and the vacuum pump is closed;
(4) Standing the measuring cylinder for a period of time until the dregs are completely precipitated, directly reading the volume of the dregs in the measuring cylinder through the scale marks, and then calculating the ratio of the volume of the dregs to the volume of the consumed mud, namely the carrying capacity of the mud; or taking out the deposited slag soil in the measuring cylinder, drying, weighing, and calculating the ratio of the mass of the slag soil to the mass of the consumed slurry, namely the slag carrying capacity of the slurry;
(5) After the measurement is finished, the valves F1, F2, F3 and F4 and the vacuum pump are opened, the valve F5 is closed, and the water in the water tank washes the whole device for the next measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139863.1A CN109061122B (en) | 2018-09-28 | 2018-09-28 | Device and method for measuring slag carrying capacity of slurry |
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| CN201811139863.1A CN109061122B (en) | 2018-09-28 | 2018-09-28 | Device and method for measuring slag carrying capacity of slurry |
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| CN109061122A CN109061122A (en) | 2018-12-21 |
| CN109061122B true CN109061122B (en) | 2023-11-03 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112834696A (en) * | 2020-12-30 | 2021-05-25 | 中煤科工集团重庆研究院有限公司 | Resistance reducing agent slag carrying capacity detection method and device |
| CN114136829B (en) * | 2021-09-16 | 2023-06-23 | 中铁十五局集团有限公司 | Indirect testing method for mud carrying capacity |
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2018
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