CN114486114B - Slurry pressure pipeline leakage test device and use method - Google Patents
Slurry pressure pipeline leakage test device and use method Download PDFInfo
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- CN114486114B CN114486114B CN202111548985.8A CN202111548985A CN114486114B CN 114486114 B CN114486114 B CN 114486114B CN 202111548985 A CN202111548985 A CN 202111548985A CN 114486114 B CN114486114 B CN 114486114B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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Abstract
The invention provides a slurry pressure pipeline leakage test device and a use method thereof. The testing device comprises a slurry storage tank, a water storage tank, a main circulation pipeline, a leakage recovery pipeline, a tail slurry recovery channel and a cleaning pipeline, wherein a slurry outlet pipe is arranged at the bottom of the slurry storage tank, and a first slurry return pipe and a second slurry return pipe are arranged at the top of the slurry storage tank. The main circulation pipeline comprises a first slurry pump, a main loop pipe and a pressure excitation device arranged on the main loop pipe, and the leakage recovery pipeline comprises a second slurry pump, a leakage recovery loop pipe, a discharge pipe arranged at each leakage detection point of the main loop pipe and at least three leakage pipes with different diameters. The invention simulates the slurry leakage of the underground slurry pipeline through the main circulation pipeline and the leakage recovery pipeline, realizes the analysis of the influence factors of the slurry leakage area and the leakage position, can realize the test of slurries with different mineral samples, slurries with different concentrations and solid-phase particle slurries with different gradations, and has important significance for the pipeline transportation of the slurries.
Description
Technical Field
The invention relates to the technical field of ore pulp conveying and leakage thereof, in particular to a slurry pressure pipeline leakage test device and a use method thereof.
Background
The ore pulp is slurry formed by crushing solid minerals such as coal, iron ore and the like to a certain particle size and then stirring the solid minerals and water to form a certain concentration, and essentially belongs to a solid-liquid two-phase flow. The slurry pipeline is formed by welding a section of standard steel pipe, in order to improve the stability of slurry transportation, the pipeline is generally buried below a 2-meter frozen soil layer on the ground surface, meanwhile, the pressure of the long-distance slurry conveying pipeline is high, if the pressure of the Shenwei coal conveying pipeline is 15Mpa, serious production accidents such as pump stopping, blockage and the like can be caused if slurry leakage occurs. The research of the slurry conveying technology in China starts late, and the research of the slurry leakage technology is in a blank state. When the slurry conveying pipeline leaks, the most important point is not how to stop leakage, but how to find a leakage point timely and quickly, so that the pump stopping time can be effectively shortened, the leakage accident is prevented from further evolving into a blocking accident, the research on slurry leakage is less at present, and a detection device specially aiming at the leakage problem of the slurry conveyed by the pipeline is not provided, so that the research on the leakage test of the slurry pressure pipeline has very important practical significance, and the theoretical basis can be provided for the design and maintenance of the slurry pipeline in the later period.
Disclosure of Invention
The invention aims to provide a slurry pressure pipeline leakage test device and a using method thereof.
In order to achieve the purpose, the invention provides a slurry pressure pipeline leakage test device which comprises a slurry storage tank, a water storage tank, a main circulation pipeline, a leakage recovery pipeline, a tail slurry recovery channel and a cleaning pipeline, wherein a slurry outlet pipe is arranged at the bottom of the slurry storage tank, and a first slurry return pipe and a second slurry return pipe are arranged at the top of the slurry storage tank; a water outlet and a water return port are formed in the water storage tank;
the main circulation pipeline comprises a first slurry pump, a main loop pipe and a pressure excitation device arranged on the main loop pipe, and the main loop pipe is erected in a suspended mode through a support frame; the slurry inlet of the main loop pipe is communicated with the outlet end of a first slurry pump, the slurry outlet is communicated with a first slurry return pipe, an A electric slurry gate valve is arranged on the first slurry return pipe, the inlet end of the first slurry pump is communicated with the slurry outlet pipe, the pressure excitation device is arranged at the position of the main loop pipe close to the slurry outlet, the position of the main loop pipe close to the inlet of the first slurry pump is provided with the slurry inlet electric gate valve, and the position of the main loop pipe close to the outlet of the pressure excitation device is provided with the slurry outlet electric gate valve; a plurality of leakage detection points are arranged between the electric gate valve of the slurry inlet and the electric gate valve of the slurry outlet of the main loop pipe, two of the leakage detection points are distributed within 1m of the distance between the slurry inlet and the slurry outlet, and the rest leakage detection points are distributed according to the distance of 10-50 m;
the leakage recovery pipeline comprises a second slurry pump, a leakage recovery ring pipe, a discharging pipe arranged at each leakage detection point of the main loop pipe and at least three leakage pipes with different diameters, wherein the leakage recovery ring pipe is arranged below the main loop pipe, a slurry outlet of the leakage recovery ring pipe is communicated with an inlet end of the second slurry pump, an outlet end of the second slurry pump is communicated with a second slurry return pipe, an H electric slurry gate valve is arranged on the leakage recovery ring pipe between the second slurry pump and the leakage detection point close to the slurry outlet, and a B electric slurry gate valve is arranged on the second slurry return pipe; the leakage recovery circular pipe is communicated with the main loop pipe through at least three leakage pipes, each leakage pipe is provided with an E electric slurry gate valve, and a pressure sensor and a flowmeter are arranged at each E electric slurry gate valve; the discharge pipe is connected below the leakage recovery ring pipe and communicated to the tail slurry recovery channel, and a discharge valve is arranged on the discharge pipe;
the tail slurry recovery channel comprises a slag pool and a tail slurry release channel arranged below the leakage recovery ring pipe, and each discharge pipe connected to the leakage recovery ring pipe is communicated with the tail slurry release channel;
the cleaning pipeline comprises a centrifugal clean water pump, a water outlet pipe, a first water return pipe and a second water return pipe, wherein the water outlet pipe, the first water return pipe and the second water return pipe are connected to the water storage tank, the centrifugal clean water pump is arranged on the water outlet pipe, the water outlet pipe is communicated with the slurry outlet pipe, an F electric slurry gate valve is arranged on the water outlet pipe, the first water return pipe is communicated with the main loop pipe, the second water return pipe is communicated with the leakage recovery loop pipe, and a C electric slurry gate valve and a D electric slurry gate valve are respectively arranged on the first water return pipe and the second water return pipe.
The invention has the following excellent technical scheme: the testing device further comprises a safety protection pipeline, a third slurry return pipe is further arranged at the top of the slurry storage tank, the first slurry pump is communicated with the slurry inlet of the main pipeline ring pipe and the slurry inlet of the safety protection pipeline through a shunt pipe, an I electric slurry gate valve is arranged at the slurry inlet of the safety protection pipeline, a J electric slurry gate valve is arranged on the shunt pipe, and a rupture disk is arranged on the safety protection pipeline.
The invention has the following excellent technical scheme: a stirrer is arranged in the slurry storage tank, liquid level meters are arranged in the slurry storage tank and the water storage tank, cleaning ports with cleaning covers are arranged on the slurry storage tank and the water storage tank, and the cleaning covers are connected with the tank body of the slurry storage tank through flanges; and a K electric slurry gate valve is arranged on the slurry outlet pipe of the slurry storage tank.
The invention has the following excellent technical scheme: the bottom of the pulp storage tank is arranged to be conical, and is suspended and erected on the ground through a first support, and the pulp outlet pipe is arranged at the center of the conical bottom; the water storage tank is a flat-bottom pipe, the water storage tank is erected at the position with the same height as the pulp storage tank through a second support suspension frame, and four first supports and four second supports are arranged and are respectively distributed at equal intervals along the circumferences of the outer bodies of the pulp storage tank and the water storage tank; the outlet pipe sets up the bottom surface at the water storage tank, and first return pipe and second return pipe set up the top surface at the water storage tank.
The invention has the following excellent technical scheme: the inlet end of the second slurry pump is also connected with a slurry recycling pipe, and a G electric slurry gate valve is arranged on the slurry recycling pipe.
The invention has the following excellent technical scheme: the supporting frames are door-shaped supports, a plurality of supporting frames are arranged and are distributed at equal intervals along the main road ring pipe, and a supporting plate is arranged between two vertical supporting rods of each door-shaped supporting frame; the main pipeline ring pipe is erected on the top of the door-shaped support frame, the leakage recovery ring pipe is arranged right below the main pipeline ring pipe and is arranged on the support plate, the slag pool and the tailing slurry discharge channel are directly arranged on the ground, the tailing slurry discharge channel is arranged right below the leakage recovery ring pipe, and the discharge pipe vertically extends downwards into the tailing slurry discharge channel.
In order to achieve the technical purpose, the invention also provides a method for testing by using the slurry pressure pipeline leakage testing device, which is characterized in that the testing method carries out leakage test on the same leakage point of the main loop pipe and comprises the following specific steps:
s1, checking and cleaning pipes before testing, and checking and resetting all control valves and pipe connectors to ensure that the whole device is intact and connection is in compliance;
s2, filling clear water into the water storage tank, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and a C electric slurry gate valve, closing other control valves, simultaneously opening a centrifugal clear water pump, and cleaning a main loop for 20-30 minutes; then closing the electric slurry gate valve of the slurry outlet, opening the electric slurry gate valve H, the electric slurry gate valve D and the electric slurry gate valve E on each leakage pipe at the first leakage point close to the slurry inlet of the main loop pipe, and cleaning the leakage recovery loop pipe for 20-30 minutes; after the above steps are completed, the clean water pump is closed, and the valve is reset;
s3, filling the slurry with fixed concentration prepared in advance into a slurry storage tank, opening a K electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and an A electric slurry gate valve, closing other valves, opening a first slurry pump, and circulating for 30-40 minutes;
s4, after the slurry runs stably, performing a leakage test on a first leakage point close to a slurry inlet of the main ring pipeline, sequentially opening an E electric slurry gate valve, an H electric slurry gate valve and a B electric slurry gate valve on each leakage pipe of the first leakage point, starting a second slurry pump, circulating for 20-30 minutes, and recording data of a pressure sensor and a flowmeter on each leakage pipe of the first leakage point after the slurry runs stably;
s5, starting a pressure excitation device to enable the whole slurry pipeline to generate excitation waves, collecting data of a pressure sensor on each leakage pipe of the first leakage point at the moment, and simultaneously recording data of a flowmeter at the E electric slurry gate valve of each leakage pipe of the first leakage point at the moment;
s6, respectively collecting data of the pressure sensor and the flowmeter in the step S4 and the step S5, and using the data in analysis of the leakage influence of the leakage position, the leakage amount and the leakage caliber on the pipeline;
s7, closing the second slurry pump, sequentially closing an E electric slurry gate valve, an H electric slurry gate valve and a B electric slurry gate valve on each leakage pipe of the first leakage point, then repeating the steps S4 to S6, sequentially completing the test of each leakage point of the main loop pipe from the slurry outlet of the slurry storage pipe 1 to the first slurry return pipe according to the flowing direction of the slurry, and collecting test data;
s9, after the test is finished, closing the first slurry pump and the second slurry pump, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and a C electric slurry gate valve, closing a K electric slurry gate valve and other control valves, and starting a centrifugal clean water pump to finish washing a main path ring pipe, and circulating for 30-40 minutes;
s10, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, an H electric slurry gate valve, a D electric slurry gate valve and an E electric slurry gate valve on each leakage pipe 16 at a first leakage point of the main path ring pipe close to the slurry inlet, starting a centrifugal clean water pump about the slurry outlet electric gate valve and other control valves, completing the washing of the leakage recovery ring pipe, circulating for 30-40 minutes, closing the centrifugal clean water pump and a power supply, and resetting the valves and the switches.
The invention provides another method for testing by using the slurry pressure pipeline leakage testing device, which is characterized in that the testing method carries out leakage tests on different leakage points and the same leakage caliber of a main loop, and the method comprises the following specific steps:
s1, checking and cleaning pipes before testing, and checking and resetting all control valves and pipe connectors to ensure that the whole device is intact and is connected with a compliance;
s2, filling clear water into the water storage tank, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and a C electric slurry gate valve, closing other control valves, simultaneously opening a centrifugal clear water pump, and cleaning a main path ring pipe for 20-30 minutes; then closing the electric slurry gate valve of the slurry outlet, and opening the electric slurry gate valve H, the electric slurry gate valve D and the electric slurry gate valve E on each leakage pipe at the first leakage point of the main loop pipe close to the slurry inlet to clean the leakage recovery loop pipe for 20-30 minutes; after the above steps are completed, the clean water pump is closed, and the valve is reset;
s3, filling the slurry with fixed concentration prepared in advance into a slurry storage tank, opening a K electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and an A electric slurry gate valve, closing other valves, opening a first slurry pump, and circulating for 30-40 minutes;
s4, after the slurry runs stably, testing a first leakage pipe of a first leakage point close to a slurry inlet of the main ring pipeline, opening an H electric slurry gate valve, a B electric slurry gate valve and an E electric slurry gate valve on the corresponding leakage pipe, starting a second slurry pump, circulating for 20-30 minutes, and recording data of a pressure sensor and a flowmeter on the tested leakage pipe;
s5, starting the pressure excitation device 10 to enable the whole slurry pipeline to generate excitation waves, enabling the whole slurry pipeline to generate the excitation waves, collecting data of a pressure sensor 43 on a first leakage pipe of a first leakage point at the moment, simultaneously recording data of a flowmeter at the electric slurry gate valve 17 of the leakage pipe E at the moment, and then closing the electric slurry gate valve of the leakage pipe E;
s6, repeating the test method and the test steps of the steps S3-S5, sequentially completing the test of the leakage pipe with the same diameter of each leakage point of the main loop pipe from the slurry outlet of the slurry storage pipe 1 to the first slurry return pipe according to the flowing direction of slurry, and recording the data of a pressure sensor and a flow meter of each test point, wherein the data are used for analyzing the leakage influence of the leakage position, the leakage amount and the leakage caliber on the pipeline;
s7, repeating the steps S3-S6, and sequentially completing the test of leakage pipes with different diameters at each leakage point; after the test is finished, closing the first slurry pump and the second slurry pump, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and a C electric slurry gate valve, closing a K electric slurry gate valve and other control valves, and opening a centrifugal clean water pump to complete the washing of the main path ring pipe, and circulating for 30-40 minutes;
s8, opening an F slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, an H electric slurry gate valve, a D electric slurry gate valve and an E electric slurry gate valve on each leakage pipe at a first leakage point of the main loop pipe close to the slurry inlet, closing the slurry outlet electric gate valve and other control valves, starting a centrifugal clean water pump, finishing washing the leakage recovery loop pipe, and circulating for 30-40 minutes; after the washing is finished, the centrifugal clean water pump and the power supply are closed, and the valve and the switch are reset.
The invention has the advantages that: all control valves in the test process are automatically controlled by a controller, and signals on each pressure sensor and each flowmeter are directly transmitted to the controller and automatically collected by the controller.
The invention has the following excellent technical scheme: in the test process, pipeline blockage or pipeline cleaning process occurs, a discharge valve on a discharge pipe corresponding to the leakage point is opened to place slag or wastewater into a tail slurry recovery channel and discharge the slag or wastewater into a slag pool, and the slurry in the slag pool can be recovered into a slurry storage tank or a water storage tank through a slag recovery pipe and a second slag slurry pump.
The first slurry pump is arranged on the concrete base behind the slurry outlet pipe of the slurry storage tank, and is mainly used for providing pressure for slurry conveying of the whole test system; the pressure excitation device is mainly used for generating instant pressure waves and conducting the instant pressure waves in the whole pipeline during pipeline test, so that the purpose of increasing the leakage amount of slurry is achieved; the tail slurry discharge flow channel is arranged right below the leakage recovery circular pipe and the main path circular pipe and is mainly used for automatically flowing or flushing the waste slurry and slurry-water mixture discharged from the discharge pipe into the slag material pool. The second slurry pump is arranged at the tail part of the leakage recovery ring pipe and mainly has two functions, one slurry pump is used for recovering the slurry of the ring pipe and is conveyed to the slurry storage tank for storage, and the other slurry pump is used for conveying the waste slurry or the slurry-water mixture in the slag material pool to the slurry storage tank or the water storage tank. The pipeline support frame is arranged at the front end and the rear end of the main loop pipe respectively, the bottom of the pipeline support frame crosses over the tail slurry discharge flow channel, and the cross beams on the two sides of the upper side support the main loop pipe and the leakage recovery loop pipe respectively. The slag charge pond is as for the rear end of whole test system, mainly used accomodates useless thick liquid and thick liquid water mixture, later accessible second slag slurry pump is inputed to storage tank or water storage tank. The centrifugal clean water pump mainly pumps clean water in the water storage tank to the slurry pump and the integral pipeline system, and simultaneously realizes the functions of cleaning the slurry in the pipeline and the displacement system. The rupture disk mainly has the function of preventing safety accidents caused by misoperation. When the system valve is in misoperation, the rupture disk is broken, the safety pipeline is communicated, and the safety of the system is protected.
The invention has the beneficial effects that:
(1) The method simulates slurry leakage of the underground slurry pipeline through the main circulation pipeline and the leakage recovery pipeline, realizes analysis of influence factors of slurry leakage area and leakage position, provides test data for research of leakage theory of the underground slurry pipeline, and provides theoretical basis for design, operation and leakage accident treatment of the slurry pipeline in later period.
(2) The method is based on an excitation response method, and the leakage point is accurately positioned through data feedback analysis of the pressure sensors and the flow meters at different positions of the slurry conveying pipeline, so that guidance is provided for later-stage leakage stopping operation; effectively shorten the pump stop time of slurry and prevent the solid particles of the slurry pipeline from depositing and blocking.
(3) The testing device has wide application range, can realize the tests of slurry of different ore samples, slurry of different concentrations and solid-phase particle slurry of different gradations, and has important significance for pipeline transportation of the slurry.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a process flow diagram of the present invention.
In the figure: 1-slurry storage tank, 2-agitator, 3-water storage tank, 4-a electric slurry gate valve, 5-C electric slurry gate valve, 6-B electric slurry gate valve, 7-D electric slurry gate valve, 8-rupture disk, 9-centrifugal clean water pump, 10-pressure excitation device, 11-G electric slurry gate valve, 12-H electric slurry gate valve, 13-outlet electric gate valve, 14-slag bath, 15-discharge pipe, 16-discharge pipe, 17-E electric slurry gate valve, 18-discharge valve, 19-support frame, 20-main pipe loop, 21-leakage recovery loop, 22-tail slurry discharge flow channel, 23-first slurry return pipe, 24-slag recovery pipe, 25-first support column, 26-second support column, 27-water outlet pipe, 28-slurry outlet pipe, 29-first slurry return pipe, 30-second slurry return pipe, 31-safe slurry pump line, 32-third slurry return pipe, 33-second slurry return pipe, 34-support plate, 35-support plate, 36-second slurry gate valve, 37-first slurry return pipe, 38-electric slurry gate valve, 40-electric slurry inlet pipe, 43-electric slurry flow meter, 40-slag flow meter, 40-electric slurry flow meter, and electric slurry flow meter.
Detailed Description
The invention is further illustrated by the following figures and examples. Fig. 1 to 2 are drawings of embodiments, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the present invention. The following claims presented in the drawings are specific to embodiments of the invention and are not intended to limit the scope of the claimed invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The embodiment of the invention provides a slurry pressure pipeline leakage test device, which comprises a slurry storage tank 1, a water storage tank 3, a main circulation pipeline, a leakage recovery pipeline, a tail slurry recovery channel, a cleaning pipeline and a safety protection pipeline 31, and is positioned on the ground of a 0-standard, as shown in figures 1 and 2. A stirrer 2 is arranged in the slurry storage tank 1, the stirrer 2 is provided with an IP54 and Y200L1 variable frequency motor, liquid level meters 45 are arranged in the slurry storage tank 1 and the water storage tank 3, cleaning ports with cleaning covers are arranged on the slurry storage tank 1 and the water storage tank 3, and the cleaning covers are connected with the tank body of the slurry storage tank through flanges; the bottom of the pulp storage tank 1 is arranged to be conical, the pulp storage tank is erected on the ground in a hanging mode through a first support column 25, a pulp outlet pipe 28 is arranged at the center of the conical bottom of the pulp storage tank 1, a K electric pulp gate valve 42 is arranged on the pulp outlet pipe 28, a first pulp return pipe 29, a second pulp return pipe 30 and a third pulp return pipe 32 are arranged at the top of the pulp storage tank 1, the size of the pulp storage tank 1 is 3m in diameter and 4m in height, and the pulp storage tank 1 is mainly used for storing pulp for leakage tests. The water storage tank 3 is a flat-bottom pipe, and is suspended at the position with the same height as the pulp storage tank 2 through a second support column 26, the first support column 25 and the second support column 26 are all provided with four parts and are distributed along the outer body circumference of the pulp storage tank 2 and the water storage tank 1 at equal intervals. The bottom of the water storage tank 3 is provided with a water outlet, and the top is provided with a water return port. The water storage tank 3 is 2m in diameter and 4m high, and the water storage tank 3 mainly has the function of storing clean water required by the whole test system.
In the embodiment of the slurry pressure pipeline leakage test device, as shown in fig. 1 and fig. 2, the main circulation pipeline includes a first slurry pump 39, a main loop pipe 20 and a pressure excitation device 10 disposed on the main loop pipe 20, and the pressure excitation device 10 is disposed at the rear part of the main loop pipe and mainly functions to generate an instantaneous pressure wave and conduct the pressure wave in the whole pipeline during pipeline test, so as to increase the slurry leakage amount. The first slurry pump 39 is installed on the concrete base behind the slurry outlet pipe 28 of the slurry storage tank 1, and is mainly used for providing pressure for slurry conveying of the whole test system. Flow 220 m of first slurry pump 3 H, head 60m. The main loop pipe is arranged behind the electric slurry gate valve behind the first slurry pump, the whole arrangement shape is in a shape of a Chinese character 'hui', the nominal diameter of the main loop pipe is DN400, the length of the main loop pipe is 150m, and the main loop pipe 20 is suspended and erected in the air through a support frame 19; the slurry inlet of the main loop pipe 20 is communicated with the outlet end of a first slurry pump 39, the slurry outlet is communicated with a first slurry return pipe 29, and the first slurry return pipe is arranged at the first positionThe slurry return pipe 29 is provided with an A electric slurry gate valve 4, the inlet end of the first slurry pump 39 is communicated with the slurry outlet pipe 28, the pressure excitation device 10 is arranged at the position of the main path ring pipe 20 close to the slurry outlet, the inlet part of the main path ring pipe 20 close to the first slurry pump 39 is provided with a slurry inlet electric gate valve 37, and the outlet part close to the pressure excitation device 10 is provided with a slurry outlet electric gate valve 13; four leakage detection points (named as D1, D2, D3 and D4 respectively, and hereinafter referred to as "the detection points") are arranged between the grout inlet electric gate valve 37 and the grout outlet electric gate valve 13 of the main pipe loop 20, and are respectively located at 0m, 50m, 100m and 150m. The support frames 19 are door-shaped supports, four support frames are arranged and are respectively arranged at the front end, the rear end and the middle end of the main pipeline ring pipe 20, the bottom of the pipeline support frame crosses over the tail slurry discharge flow channel, a support plate 35 is arranged between two vertical support rods of each door-shaped support frame 19, and the main pipeline ring pipe 20 is erected at the top of the door-shaped support frame 19.
The first slurry pump 39 is respectively communicated with the main loop pipe 20 and the slurry inlet of the safety protection pipeline 31 through a shunt pipe 34, an electric slurry gate valve 40 is arranged at the slurry inlet I of the safety protection pipeline 31, a J electric slurry gate valve 38 is arranged on the shunt pipe 34, a rupture disk 8 is arranged on the safety protection pipeline 31, and the rupture disk 8 mainly has the function of preventing safety accidents caused by misoperation; when the system valve is in misoperation, the rupture disk 8 is broken, the safety pipeline is communicated, and the safety of the system is protected.
In the embodiment, as shown in fig. 1 and 2, the leakage recovery pipeline includes a second slurry pump 36 and a leakage recovery loop pipe 21, a discharge pipe 15 at each leakage detection point of a main loop pipe 20 and three leakage pipes 16 with diameters of DN150, DN100 and DN50, the leakage recovery loop pipe 21 is arranged right below the main loop pipe 20 and is arranged on a support plate 35, and the leakage recovery loop pipe 21 is in a shape of a Chinese character 'hui' as a whole, has a nominal diameter of DN200 and a length of 150m. The second slurry pump 36 is arranged at the tail part of the leakage recovery loop pipe 21, and has the main functions of recovering slurry in the loop pipe, pumping the slurry to a slurry storage tank for storage, and pumping waste slurry or a slurry-water mixture in the slag pool to the slurry storage tank or a water storage tank. The slurry outlet of the leakage recovery loop pipe 21 is communicated with the inlet end of a second slurry pump 36, the outlet end of the second slurry pump 36 is communicated with a second slurry return pipe 30, an H electric slurry gate valve 12 is arranged on the leakage recovery loop pipe 21 between the second slurry pump 36 and a leakage detection point close to the slurry outlet, and a B electric slurry gate valve 6 is arranged on the second slurry return pipe 30; the inlet end of the second slurry pump 36 is also connected with a slurry recycling pipe 24, and the slurry recycling pipe 24 is provided with a G electric slurry gate valve 11. The three leakage pipes 16 respectively communicate the leakage recovery circular pipe 21 with the main path circular pipe 20, each leakage pipe 16 is provided with an E electric slurry gate valve 17, and a 113B type pressure sensor 43 and a flowmeter 44 are arranged at each E electric slurry gate valve 17; the discharging pipe 15 is vertically connected below the leakage recovery ring pipe 21 and communicated with the tail slurry recovery channel, and a discharging valve 18 is arranged on the discharging pipe 15; the tail slurry recovery channel comprises a slag pool 14 and a tail slurry discharge channel 22 arranged right below the leakage recovery circular pipe 21, the slag pool 14 and the tail slurry discharge channel 22 are directly arranged on the ground, and each discharge pipe 15 connected to the leakage recovery circular pipe 21 is communicated with the tail slurry discharge channel 22; a discharge valve 18 is located at the lowest part of the loop and when the discharge valve 18 is opened the slurry in the main loop pipe 20 and leaking recovery loop 21 can flow into the tailings bleed flow passage 22 and eventually into the slag bath 14. The slag pool 14 is arranged at the rear end of the whole test system, is mainly used for containing a waste slurry and slurry-water mixture, and can be pumped into the slurry storage tank 1 or the water storage tank 3 through the second slag slurry pump 36.
In the embodiment of the leakage test device for the slurry pressure pipeline, as shown in fig. 1 and fig. 2, the cleaning pipeline includes a centrifugal clean water pump 9, a water outlet pipe 27 connected to a water storage opening at the bottom of the water storage tank 3, and a first water return pipe 23 and a second water return pipe 33 connected to a water return opening at the top of the water storage tank 3. The centrifugal clean water pump 9 is arranged on a water outlet pipe 27, the water outlet pipe 27 is communicated with a pulp outlet pipe 28, an F electric pulp gate valve 41 is arranged on the water outlet pipe 27, the first water return pipe 23 is communicated with the main loop pipe 20, the second water return pipe 33 is communicated with the leakage recovery loop pipe 21, and a C electric pulp gate valve 5 and a D electric pulp gate valve 7 are respectively arranged on the first water return pipe 23 and the second water return pipe 33. The centrifugal clean water pump 9 mainly pumps clean water in the water storage tank 3 to a slurry pump and an integral pipeline system, and simultaneously realizes the functions of cleaning slurry in a pipeline and a displacement system.
The test process of the present invention is further described with reference to the following embodiments, wherein in the first test, the slurry pressure pipeline leakage test apparatus is adopted to perform a leakage test for the same leakage point, and the specific steps are as follows:
s1, checking and cleaning pipes before testing, and checking and resetting all control valves and pipe connectors to ensure that the whole device is intact and is connected with a compliance;
s2, filling clear water into the water storage tank 3, opening the F electric slurry gate valve 41, the J electric slurry gate valve 38, the slurry inlet electric gate valve 37, the slurry outlet electric gate valve 13 and the C electric slurry gate valve 5, closing other control valves, simultaneously opening the centrifugal clean water pump 9, and cleaning the main path circular pipe 20 for 20-30 minutes; then closing the electric slurry gate valve 13 at the slurry outlet, and opening the electric slurry gate valve 12 of the H, the electric slurry gate valve 7 of the D and the electric slurry gate valve 17 of the E on each leaking pipe 16 at the first leaking point of the main loop pipe 20 close to the slurry inlet to clean the leaking recovery loop pipe 21 for 20-30 minutes; after the above steps are completed, the clean water pump is closed, and the valve is reset;
s3, filling the slurry with fixed concentration prepared in advance into the slurry storage tank 1, opening the K electric slurry gate valve 42, the J electric slurry gate valve 38, the slurry inlet electric gate valve 37, the slurry outlet electric gate valve 13 and the A electric slurry gate valve 4, closing other valves, opening the first slurry pump 39, and circulating for 30-40 minutes;
s4, after the slurry runs stably, testing a D1 leakage point close to the slurry inlet, sequentially opening an E electric slurry gate valve 17, an H electric slurry gate valve 12 and a B electric slurry gate valve 6 on each leakage pipe 16 of the D1 leakage point, starting a second slurry pump 36, and circulating for 20-30 minutes;
s5, after the slurry runs stably, recording data of a pressure sensor 43 and a flowmeter 44 on each leakage pipe 16 of the D1 leakage point;
s6, starting the pressure excitation device 10 to enable the whole slurry pipeline to generate excitation waves, collecting data of a pressure sensor 43 on each leakage pipe 16 of the D1 leakage point at the moment, and simultaneously recording data of a flowmeter 44 at an E electric slurry gate valve 17 of each leakage pipe 16 of the D1 leakage point at the moment;
s7, respectively collecting data of the pressure sensor 43 and the flowmeter 44 in the step c and the step d, and analyzing the leakage influence of the leakage position, the leakage amount and the leakage caliber on the pipeline through processing the data;
s8, closing a second slurry pump 36, closing an E electric slurry gate valve 17, an H electric slurry gate valve 12 and a B electric slurry gate valve 6 on each leakage pipe 16 of the D1 leakage point in sequence, then repeating the steps B to E, and completing the test and data collection and analysis of all the leakage pipes on the D1 leakage point, the D2 leakage point, the D3 leakage point and the D4 leakage point on the main loop pipe in sequence from the slurry outlet of the slurry storage pipe 1 to the first slurry return pipe 29 according to the flowing direction of slurry;
s9, after the test is finished, closing a first slurry pump 39 and a second slurry pump 36, opening an F electric slurry gate valve 41, a J electric slurry gate valve 38, a slurry inlet electric gate valve 37, a slurry outlet electric gate valve 13 and a C electric slurry gate valve 5, closing a K electric slurry gate valve 42 and other control valves, and starting a centrifugal clean water pump 9 to finish washing a main path ring pipe, and circulating for 30-40 minutes;
s10, opening an F electric slurry gate valve 41, a J electric slurry gate valve 38, a slurry inlet electric gate valve 37, an H electric slurry gate valve 12, a D electric slurry gate valve 7 and an E electric slurry gate valve 17 on each leakage pipe 16 at a leakage point 1 of the main loop pipe 20 close to the slurry inlet, starting a centrifugal clean water pump 9 about a slurry outlet electric gate valve 13 and other control valves to complete washing of a leakage recovery loop pipe, circulating for 30-40 minutes, closing the centrifugal clean water pump 9 and a power supply, and resetting the valves and switches.
And a second test step, namely performing a leakage test on the same leakage caliber at different leakage points by using the slurry pressure pipeline leakage test device, wherein the second test step comprises the following specific steps:
s1, checking and cleaning pipes before testing, and checking and resetting all control valves and pipe connectors to ensure that the whole device is intact and is connected with a compliance;
s2, filling clear water into the water storage tank 3, opening the F electric slurry gate valve 41, the J electric slurry gate valve 38, the slurry inlet electric gate valve 37, the slurry outlet electric gate valve 13 and the C electric slurry gate valve 5, closing other control valves, simultaneously opening the centrifugal clean water pump 9, and cleaning the main path circular pipe 20 for 20-30 minutes; then closing the electric slurry gate valve 13 at the slurry outlet, and opening the electric slurry gate valve 12 at the H, the electric slurry gate valve 7 at the D and the electric slurry gate valve 17 at the E on each leakage pipe 16 at the first leakage point of the main loop pipe 20 close to the slurry inlet, and cleaning the leakage recovery loop pipe 21 for 20-30 minutes; after the above steps are completed, the clean water pump is closed, and the valve is reset;
s3, filling the slurry with fixed concentration prepared in advance into the slurry storage tank 1, opening the K electric slurry gate valve 42, the J electric slurry gate valve 38, the slurry inlet electric gate valve 37, the slurry outlet electric gate valve 13 and the A electric slurry gate valve 4, closing other valves, opening the first slurry pump 39, and circulating for 30-40 minutes;
s4, after the slurry runs stably, testing a DN50 leakage pipe of a D1 leakage point close to the slurry inlet, opening an H electric slurry gate valve 12, a B electric slurry gate valve 6 and an E electric slurry gate valve 17 on the corresponding leakage pipe, starting a second slurry pump 36, circulating for 20-30 minutes, and recording data of a pressure sensor and a flowmeter on the DN50 leakage pipe of the D1 leakage point;
s5, starting the pressure excitation device 10 to enable the whole slurry pipeline to generate excitation waves, enabling the whole slurry pipeline to generate the excitation waves, collecting data of a pressure sensor 43 on a DN50 leakage pipe of the D1 leakage point, recording data of a flowmeter 44 at an E electric slurry gate valve 17 on the DN50 leakage pipe of the D1 leakage point, and then closing the E electric slurry gate valve on the leakage pipe;
s6, repeating the test method and the steps of the steps S3 to S5, sequentially completing tests on the DN50 leakage pipe of the D1 leakage point, the DN50 leakage pipe of the D2 leakage point, the DN50 leakage pipe of the D3 leakage point and the DN50 leakage pipe of the D4 leakage point of the main loop pipe 20 from the slurry outlet of the slurry storage pipe 1 to the first slurry return pipe 29 according to the flowing direction of slurry, recording the data of the pressure sensor and the flowmeter of the leakage pipe with the same diameter of each test point, and analyzing the leakage influence of the leakage position, the leakage amount and the leakage caliber on the pipeline by processing the collected data;
s7, repeating the steps S3-S6, and sequentially completing the tests of the D1 leakage point, the D2 leakage point, the D3 leakage point, the DN150 leakage point and the DN100 leakage pipe at the D4 leakage point; after the test is finished, closing the first slurry pump 39 and the second slurry pump 36, opening the F electric slurry gate valve 41, the J electric slurry gate valve 38, the slurry inlet electric gate valve 37, the slurry outlet electric gate valve 13 and the C electric slurry gate valve 5, closing the K electric slurry gate valve 42 and other control valves, and starting the centrifugal clean water pump 9 to complete the washing of the main loop, and circulating for 30-40 minutes;
s8, opening an F electric slurry gate valve 41, a J electric slurry gate valve 38, a slurry inlet electric gate valve 37, an H electric slurry gate valve 12, a D electric slurry gate valve 7 and an E electric slurry gate valve 17 on each leakage pipe 16 of a D1 leakage point of the main loop pipe 20 close to the slurry inlet, closing a slurry outlet electric gate valve 13 and other control valves, starting a centrifugal clean water pump 9, completing the flushing of a leakage recovery loop pipe, and circulating for 30-40 minutes; after the washing is finished, the centrifugal clear water pump 9 and the power supply are closed, and the valve and the switch are reset.
In the process of pipeline blockage or pipeline cleaning, a discharge valve on a discharge pipe corresponding to a leakage point is opened to place slag or wastewater into a tail slurry recovery channel and discharge the slag or wastewater into a slag pool 14, and the slurry in the slag pool can be recovered into a slurry storage tank 1 or a water storage tank through the slag recovery pipe.
All control valves in the test process can be automatically controlled by a controller, and signals on each pressure sensor and each flowmeter are directly transmitted to the controller and automatically collected by the controller; the collected data may be automatically input into an existing analysis system for analysis.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the structural relationship and principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a slurry pressure pipeline leakage test device which characterized in that: the test device comprises a slurry storage tank (1), a water storage tank (3), a main circulation pipeline, a leakage recovery pipeline, a tail slurry recovery channel and a cleaning pipeline, wherein a slurry outlet pipe (28) is arranged at the bottom of the slurry storage tank (1), and a first slurry return pipe (29) and a second slurry return pipe (30) are arranged at the top of the slurry storage tank; a water outlet and a water return port are formed in the water storage tank (3);
the main circulation pipeline comprises a first slurry pump (39), a main loop pipe (20) and a pressure excitation device (10) arranged on the main loop pipe (20), and the main loop pipe (20) is suspended and erected through a support frame (19); the slurry inlet of the main loop pipe (20) is communicated with the outlet end of a first slurry pump (39), the slurry outlet is communicated with a first slurry return pipe (29), an A electric slurry gate valve (4) is arranged on the first slurry return pipe (29), the inlet end of the first slurry pump (39) is communicated with a slurry outlet pipe (28), the pressure excitation device (10) is arranged at the position of the main loop pipe (20) close to the slurry outlet, a slurry inlet electric gate valve (37) is arranged at the position of the main loop pipe (20) close to the inlet of the first slurry pump (39), and a slurry outlet electric gate valve (13) is arranged at the position of the main loop pipe (20) close to the outlet of the pressure excitation device (10); a plurality of leakage detection points are arranged between the pulp inlet electric gate valve (37) and the pulp outlet electric gate valve (13) of the main road ring pipe (20), two of the leakage detection points are distributed within 1m of the distance between the pulp inlet and the pulp outlet, and the rest leakage detection points are distributed according to the distance of 10-50 m;
the leakage recovery pipeline comprises a second slurry pump (36), a leakage recovery circular pipe (21), a discharge pipe (15) arranged at each leakage detection point on the main circular pipe (20) and at least three leakage pipes (16) with different diameters, the leakage recovery circular pipe (21) is arranged below the main circular pipe (20), a slurry outlet of the leakage recovery circular pipe (21) is communicated with an inlet end of the second slurry pump (36), an outlet end of the second slurry pump (36) is communicated with a second slurry return pipe (30), an H electric slurry gate valve (12) is arranged on the leakage recovery circular pipe (21) between the second slurry pump (36) and the leakage detection point close to the slurry outlet, and a B electric slurry gate valve (6) is arranged on the second slurry return pipe (30); at least three leakage pipes (16) respectively communicate the leakage recovery circular pipe (21) with the main circuit circular pipe (20), each leakage pipe (16) is provided with an E electric slurry gate valve (17), and a pressure sensor (43) and a flowmeter (44) are arranged at each E electric slurry gate valve (17); the discharge pipes (15) are connected below the leakage recovery circular pipe (21) and communicated with the tail slurry recovery channel, and each discharge pipe (15) is provided with a discharge valve (18);
the tail slurry recovery channel comprises a slag pool (14) and a tail slurry release channel (22) arranged below the leakage recovery circular pipe (21), and each discharge pipe (15) connected to the leakage recovery circular pipe (21) leads to the tail slurry release channel (22);
the cleaning pipeline comprises a centrifugal clean water pump (9) and a water outlet pipe (27), a first water return pipe (23) and a second water return pipe (33) which are connected to a water storage tank (3), the centrifugal clean water pump (9) is arranged on the water outlet pipe (27), the water outlet pipe (27) is communicated with a slurry outlet pipe (28), an F electric slurry gate valve (41) is arranged on the water outlet pipe (27), the first water return pipe (23) is communicated with a main pipe ring pipe (20), the second water return pipe (33) is communicated with a leakage recovery ring pipe (21), and a C electric slurry gate valve (5) and a D electric slurry gate valve (7) are respectively arranged on the first water return pipe (23) and the second water return pipe (33).
2. The slurry pressure pipeline leak test device according to claim 1, characterized in that: the testing device further comprises a safety protection pipeline (31), a third slurry return pipe (32) is further arranged at the top of the slurry storage tank (1), a first slurry pump (39) is communicated with slurry inlets of the main road ring pipe (20) and the safety protection pipeline (31) through a shunt pipe (34), an I electric slurry gate valve (40) is arranged at the slurry inlet of the safety protection pipeline (31), a J electric slurry gate valve (38) is arranged on the shunt pipe (34), and a rupture disk (8) is arranged on the safety protection pipeline (31).
3. The slurry pressure pipeline leakage test device according to claim 1, characterized in that: a stirrer (2) is arranged in the slurry storage tank (1), liquid level meters (45) are arranged in the slurry storage tank (1) and the water storage tank (3), cleaning ports with cleaning covers are arranged on the slurry storage tank (1) and the water storage tank (3), and the cleaning covers are connected with the tank body of the slurry storage tank through flanges; a K electric slurry gate valve (42) is arranged on the slurry outlet pipe (28) of the slurry storage tank (1).
4. A slurry pressure line leak test apparatus according to claim 1, 2 or 3, wherein: the bottom of the pulp storage tank (1) is arranged to be conical, and is suspended and erected on the bottom surface through a first support (25), and a pulp outlet pipe (28) is arranged at the center of the conical bottom; the water storage tank (3) is a flat-bottom pipe, the water storage tank is erected at a position with the same height as the pulp storage tank (2) in a hanging manner through a second support column (26), and four first support columns (25) and four second support columns (26) are arranged and are distributed at equal intervals along the circumferences of the outer bodies of the pulp storage tank (2) and the water storage tank (1) respectively; the water outlet pipe (27) is arranged on the bottom surface of the water storage tank (3), and the first water return pipe (23) and the second water return pipe (33) are arranged on the top surface of the water storage tank (3).
5. A slurry pressure line leak test apparatus according to claim 1, 2 or 3, wherein: the inlet end of the second slurry pump (36) is also connected with a slurry recycling pipe (24), and the slurry recycling pipe (24) is provided with a G electric slurry gate valve (11).
6. A slurry pressure line leak test apparatus according to claim 1, 2 or 3, wherein: the support frames (19) are door-shaped supports, a plurality of support frames are arranged and are distributed at equal intervals along the main road ring pipe (20), and a support plate (35) is arranged between two vertical support rods of each door-shaped support frame (19); the main pipeline ring pipe (20) is erected at the top of the door-shaped supporting frame (19), the leakage recovery ring pipe (21) is arranged under the main pipeline ring pipe (20) and is arranged on the supporting plate (35), the slag pool (14) and the tailing slurry release channel (22) are directly arranged on the ground, the tailing slurry release channel (22) is arranged under the leakage recovery ring pipe (21), and the discharge pipe (15) vertically stretches into the tailing slurry release channel (22) downwards.
7. A method of using the apparatus for testing leakage of a slurry pressure pipeline according to any of claims 1 to 6, wherein the method comprises performing a leakage test for the same leakage point of the main loop, and the method comprises the following steps:
s1, checking and cleaning pipes before testing, and checking and resetting all control valves and pipe connectors to ensure that the whole device is intact and connection is in compliance;
s2, filling clear water into the water storage tank, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and a C electric slurry gate valve, closing other control valves, simultaneously opening a centrifugal clear water pump, and cleaning a main path ring pipe for 20-30 minutes; then closing the electric slurry gate valve of the slurry outlet, opening the electric slurry gate valve H, the electric slurry gate valve D and the electric slurry gate valve E on each leakage pipe at the first leakage point close to the slurry inlet of the main loop pipe, and cleaning the leakage recovery loop pipe for 20-30 minutes; after the above steps are completed, the clean water pump is closed, and the valve is reset;
s3, filling the slurry with fixed concentration prepared in advance into a slurry storage tank, opening a K electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and an A electric slurry gate valve, closing other valves, opening a first slurry pump, and circulating for 30-40 minutes;
s4, after the slurry runs stably, performing a leakage test on a first leakage point close to a slurry inlet of the main ring pipeline, sequentially opening an E electric slurry gate valve, an H electric slurry gate valve and a B electric slurry gate valve on each leakage pipe of the first leakage point, starting a second slurry pump, circulating for 20-30 minutes, and recording data of a pressure sensor and a flowmeter on each leakage pipe of the first leakage point after the slurry runs stably;
s5, starting a pressure excitation device to enable the whole slurry pipeline to generate excitation waves, collecting data of a pressure sensor on each leakage pipe of the first leakage point at the moment, and simultaneously recording data of a flowmeter at the E electric slurry gate valve of each leakage pipe of the first leakage point at the moment;
s6, respectively collecting data of the pressure sensor and the flowmeter in the step S4 and the step S5, and using the data in analysis of the leakage influence of the leakage position, the leakage amount and the leakage caliber on the pipeline;
s7, closing the second slurry pump, sequentially closing an E electric slurry gate valve, an H electric slurry gate valve and a B electric slurry gate valve on each leakage pipe of the first leakage point, then repeating the steps S4 to S6, sequentially completing the test of each leakage point of the main loop pipe from the slurry outlet of the slurry storage pipe 1 to the first slurry return pipe according to the flowing direction of the slurry, and collecting test data;
s9, after the test is finished, closing the first slurry pump and the second slurry pump, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and a C electric slurry gate valve, closing a K electric slurry gate valve and other control valves, and starting a centrifugal clean water pump to finish washing a main path ring pipe, and circulating for 30-40 minutes;
s10, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, an H electric slurry gate valve, a D electric slurry gate valve and an E electric slurry gate valve on each leakage pipe at a first leakage point of the main loop pipe close to the slurry inlet, closing the slurry outlet electric gate valve and other control valves, starting a centrifugal clean water pump, completing the flushing of the leakage recovery loop pipe, circulating for 30-40 minutes, closing the centrifugal clean water pump and a power supply, and resetting the valves and the switches.
8. A method of using the slurry pressure pipeline leak test device according to any one of claims 1 to 6, characterized in that the method comprises the following steps of carrying out leak tests on different leak points with the same leak caliber of the main loop:
s1, checking and cleaning pipes before testing, and checking and resetting all control valves and pipe connectors to ensure that the whole device is intact and is connected with a compliance;
s2, filling clear water into the water storage tank, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and a C electric slurry gate valve, closing other control valves, simultaneously opening a centrifugal clear water pump, and cleaning a main path ring pipe for 20-30 minutes; then closing the electric slurry gate valve at the slurry outlet, and opening the electric slurry gate valve H, the electric slurry gate valve D and the electric slurry gate valve E on each leakage pipe at the first leakage point of the main loop pipe close to the slurry inlet to clean the leakage recovery loop pipe for 20-30 minutes; after the above steps are completed, the clean water pump is closed, and the valve is reset;
s3, filling the slurry with fixed concentration prepared in advance into a slurry storage tank, opening a K electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and an A electric slurry gate valve, closing other valves, opening a first slurry pump, and circulating for 30-40 minutes;
s4, after the slurry runs stably, testing a first leakage pipe of a first leakage point close to a slurry inlet of the main ring pipeline, opening an H electric slurry gate valve, a B electric slurry gate valve and an E electric slurry gate valve on the corresponding leakage pipe, starting a second slurry pump, circulating for 20-30 minutes, and recording data of a pressure sensor and a flowmeter on the tested leakage pipe;
s5, starting a pressure excitation device to enable the whole slurry pipeline to generate excitation waves, enabling the whole slurry pipeline to generate the excitation waves, collecting data of a pressure sensor on a first leakage pipe of a first leakage point at the moment, simultaneously recording data of a flowmeter at an electric slurry gate valve of the leakage pipe E at the moment, and then closing the electric slurry gate valve of the leakage pipe E;
s6, repeating the test method steps of the steps S3-S5, sequentially completing the test of the leakage pipe with the same diameter of each leakage point of the main loop pipe from the slurry outlet of the slurry storage tank to the first slurry return pipe according to the flowing direction of slurry, and recording the data of a pressure sensor and a flow meter of each test point, wherein the data are used for analyzing the leakage influence of the leakage position, the leakage amount and the leakage caliber on the pipeline;
s7, repeating the steps S3-S6, and sequentially completing the test of leakage pipes with different diameters at each leakage point; after the test is finished, closing the first slurry pump and the second slurry pump, opening an F electric slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, a slurry outlet electric gate valve and a C electric slurry gate valve, closing a K electric slurry gate valve and other control valves, and opening a centrifugal clean water pump to complete the washing of the main path ring pipe, and circulating for 30-40 minutes;
s8, opening an F slurry gate valve, a J electric slurry gate valve, a slurry inlet electric gate valve, an H electric slurry gate valve, a D electric slurry gate valve and an E electric slurry gate valve on each leakage pipe at a first leakage point of the main loop pipe close to the slurry inlet, closing the slurry outlet electric gate valve and other control valves, starting a centrifugal clean water pump, finishing washing the leakage recovery loop pipe, and circulating for 30-40 minutes; after the washing is finished, the centrifugal clean water pump and the power supply are closed, and the valve and the switch are reset.
9. The use method of the slurry pressure pipeline leakage test device according to claim 7 or 8, characterized in that: all control valves are automatically controlled by a controller in the test process, and signals on each pressure sensor and each flow meter are directly transmitted to the controller and automatically collected by the controller.
10. The use method of the slurry pressure pipeline leakage test device according to claim 7 or 8, characterized in that: in the process of pipeline blockage or pipeline cleaning, a discharge valve on a discharge pipe corresponding to the leakage point is opened to place slag or waste water into a tail slurry recovery channel and discharge the slag or waste water into a slag pool, and the slurry in the slag pool can be recovered into a slurry storage tank or a water storage tank through a slag recovery pipe and a second slag slurry pump.
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