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CN-121973112-A - Slurry continuous feeding device and application method thereof

CN121973112ACN 121973112 ACN121973112 ACN 121973112ACN-121973112-A

Abstract

The invention belongs to the technical field of abrasive water suspension jet flow, and discloses a slurry continuous supply device and a use method thereof, wherein the device comprises a water tank, a mixing tank, a booster pump, a sand-adding jet pump, an abrasive box and a feeding jet pump; the sand inlet of the sand adding jet pump is communicated with the outlet of the abrasive material box, the sand outlet of the sand adding jet pump is communicated with the mixing box, the sand inlet of the feed jet pump is communicated with the bottom discharge port of the mixing box, and the outlet of the feed jet pump is communicated with the inlet of the high-pressure pump. The invention adopts the low-pressure open abrasive mixing box to mix and supply on the liquid inlet pipeline of the high-pressure pump, and solves the problems that the closed high-pressure abrasive tank is inapplicable to the working condition of large-flow jet flow due to high pressure bearing and limited volume, the design difficulty of the high-pressure container is high, the cost is high and the like.

Inventors

  • CHEN ZHENGWEN
  • LU FEI
  • BA SHENGFU
  • REN QILE
  • LIU HAISHAN
  • WEN HONGGANG
  • WEI ZHICHAO
  • ZHANG DE
  • ZHOU LIANCHUN

Assignees

  • 合肥通用机械研究院有限公司
  • 通用机械关键核心基础件创新中心(安徽)有限公司

Dates

Publication Date
20260505
Application Date
20260211

Claims (10)

  1. 1. The slurry continuous supply device is characterized by comprising a water tank (1), a mixing tank (2), a pressurizing pump (3), a sand adding jet pump (4), an abrasive tank (5) and a feeding jet pump (6); The top of the mixing box (2) and the top of the grinding material box (5) are both open, an inlet of the pressurizing pump (3) is communicated with a water outlet at the bottom of the water tank (1), and an outlet of the pressurizing pump (3) is communicated with a water inlet of the feeding jet pump (6) through a first pipeline (7); The sand inlet of the sand jet pump (4) is communicated with the outlet of the grinding material box (5), the water inlet of the sand jet pump (4) is communicated with the first pipeline (7) through a third pipeline (9), the sand outlet of the sand jet pump (4) is communicated with one end of a fourth pipeline (10), the other end of the fourth pipeline (10) extends to the inside of the mixing box (2), the sand inlet of the feed jet pump (6) is communicated with the bottom discharge port of the mixing box (2) through a fifth pipeline (11), and the outlet of the feed jet pump (6) is communicated with the inlet of the high-pressure pump through a sixth pipeline (12).
  2. 2. The slurry continuous feeding device according to claim 1, characterized in that the top water outlet of the water tank (1) is in communication with the water inlet of the mixing tank (2) through a second pipe (8).
  3. 3. A slurry continuous feeding device according to claim 2, characterized in that the second pipe (8) is provided with a communication valve (13).
  4. 4. A slurry continuous feeding device according to claim 1, characterized in that the third pipe (9) is provided with a pressure regulating valve (14), the pressure regulating valve (14) being used for regulating the pressure and flow of water entering the sand jet pump (4).
  5. 5. A slurry continuous feeding device according to claim 1, characterized in that the fifth pipe (11) is provided with a flow regulating valve (15), the flow regulating valve (15) being adapted to regulate the flow into the feed jet pump (6).
  6. 6. A slurry continuous feeding device according to claim 1, characterized in that a sampling valve (16) is arranged on the bypass of the sixth conduit (12).
  7. 7. A slurry continuous feeding apparatus according to any one of claims 1 to 6, wherein a venturi tube is provided in the feed jet pump (6), and the venturi tube is used for performing contraction acceleration, diffusion deceleration pressurization on the mixed fluid so as to uniformly mix the abrasive and water.
  8. 8. The application method of the slurry continuous supply device is characterized by comprising the following steps of: The pressurizing pump (3) pressurizes water in the water tank (1) and then conveys the water to the water inlets of the third pipeline (9) and the feed jet pump (6) through the first pipeline (7); the third pipeline (9) conveys the pressurized water to a water inlet of the sand adding jet pump (4), the sand adding jet pump (4) pumps the abrasive in the abrasive box (5) under the action of the pressurized water, and the mixed liquid of the water and the abrasive is conveyed to the mixing box (2) through the fourth pipeline (10); The abrasive in the mixing box (2) is mixed with water, pumped by the feed jet pump (6) and uniformly mixed with the water of the first pipeline (7), and is conveyed to the inlet of the high-pressure pump through the sixth pipeline (12).
  9. 9. The method of using a slurry continuous feeding apparatus according to claim 8, further comprising the step of keeping the liquid level of the mixing tank (2) in line with the water level in the water tank (1) through the second pipe (8), and adjusting the abrasive concentration by adjusting the flow rate of the working water flow through the third pipe (9).
  10. 10. The method of using a slurry continuous feeding apparatus according to claim 8, further comprising the step of adjusting the flow rate of the abrasive material of the mixing tank (2) into the feed jet pump (6) through the fifth pipe (11).

Description

Slurry continuous feeding device and application method thereof Technical Field The invention belongs to the technical field of abrasive water suspension jet flow, and particularly relates to a slurry continuous supply device and a use method thereof. Background The abrasive water jet system is used as efficient cutting and crushing equipment, is widely applied to a plurality of fields such as stone processing, metal cutting, mining and rock breaking, and is mainly divided into a post-mixed abrasive water jet system and a pre-mixed abrasive water jet system according to the mixing position and mode of abrasive and water. The mixing process of the post-mixed abrasive water jet system is carried out at a high-pressure pipeline stage, the premixing of the abrasive and water is realized by a high-pressure sand mixing tank on an output pipeline of a high-pressure plunger pump generally, and the mixed abrasive water mixture is conveyed to the nozzle to form jet flow. From the application performance, the required working pressure of the post-mixed abrasive water jet system can be obviously reduced to 200-300 MPa in the scenes of cutting stone, metal plates and the like due to the holding of the abrasive, compared with pure water jet, the equipment pressure requirement is greatly reduced, and the pre-mixed abrasive water jet system can obtain more sufficient acceleration of abrasive particles in a high-pressure pipeline due to the earlier mixing time of the abrasive and water, so that the working pressure can be further reduced to tens of MPa to 100MPa on the premise of realizing the same cutting effect as that of the post-mixed abrasive water jet. In the special fields of water jet mining and the like which need to cut and crush rock, the working pressure and the medium flow of the system are required to be high, the working conditions that the working pressure is about 100MPa and the medium flow is not lower than 100L/min are generally required to be met, and when the existing post-mixed abrasive water jet system and pre-mixed abrasive water jet system are applied to the special fields of water jet mining and the like, the following problems exist: 1. The existing post-mixing abrasive water jet system has low energy utilization rate, abrasive is accelerated at the outlet of the nozzle, the acceleration distance is short, the abrasive is wrapped and clamped only by water flow, the abrasive speed is far lower than the water flow speed, a large amount of energy is lost in the speed difference of two-phase flow, and the problem of uneven abrasive mixing exists. 2. The prior pre-mixed abrasive water jet system has the defects that a high-pressure sand mixing tank as a core component belongs to a high-pressure container, the structural strength and the safety specification under the high-pressure working condition are limited, the volume of the sand mixing tank cannot be designed to be too large, the continuous feeding capability of abrasive is limited, the scene requirement of long-time and continuous operation is difficult to meet, and the applicability is insufficient in large-scale industrial application. In summary, when the conventional abrasive water jet system is applied to special fields such as water jet mining, the pressure of the high-pressure sand mixing tank is limited due to the high pressure, the volume is not applicable to the working condition of large-flow jet, the continuous long-time operation cannot be realized, and the problems of low energy utilization rate, uneven abrasive mixing and the like exist. Disclosure of Invention The invention provides a slurry continuous supply device, which comprises a water tank, a mixing tank, a pressurizing pump, a sand adding jet pump, a grinding tank and a feeding jet pump; The top of the mixing box and the top of the grinding material box are both open, the inlet of the pressurizing pump is communicated with the water outlet at the bottom of the water tank, and the outlet of the pressurizing pump is communicated with the water inlet of the feeding jet pump through a first pipeline; The sand inlet of the sand adding jet pump is communicated with the outlet of the abrasive tank, the water inlet of the sand adding jet pump is communicated with the first pipeline through a third pipeline, the sand outlet of the sand adding jet pump is communicated with one end of a fourth pipeline, the other end of the fourth pipeline extends to the inside of the mixing tank, the sand inlet of the feeding jet pump is communicated with the bottom discharge port of the mixing tank through a fifth pipeline, and the outlet of the feeding jet pump is communicated with the inlet of the high-pressure pump through a sixth pipeline. Further, the top water outlet of the water tank is communicated with the water inlet of the mixing tank through a second pipeline. Further, a communication valve is arranged on the second pipeline. Further, a pressure regulating valve is arranged on the third