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CN-224214438-U - Pipeline structure for centrifugal pump

CN224214438UCN 224214438 UCN224214438 UCN 224214438UCN-224214438-U

Abstract

The utility model discloses a pipeline structure for a centrifugal pump, which comprises a first pipeline and a second pipeline, wherein the first pipeline is used for connecting an inlet end of the centrifugal pump, the first pipeline comprises a first flexible pipe and a supporting structure, the first flexible pipe body is sleeved on the outer wall of the supporting structure, the supporting structure extends along the length direction of the first flexible pipe body, the supporting structure is used for supporting the first flexible pipe along the radial direction of the first flexible pipe, the second pipeline is used for connecting an outlet end of the centrifugal pump, the second pipeline comprises a second flexible pipe body and a constraint structure, the constraint structure is sleeved on the outer wall of the second flexible pipe body, the constraint structure extends along the length direction of the second flexible pipe body, and the constraint structure is used for limiting the second flexible pipe along the radial direction of the second flexible pipe, so as to solve the technical problem of poor stability of the hose structure in the centrifugal pump under the positive and negative pressure environment.

Inventors

  • LIU KEJIN
  • MU ZHEN
  • WANG RUIXIANG
  • LIU SHIYU

Assignees

  • 惠州亿纬锂能股份有限公司

Dates

Publication Date
20260508
Application Date
20250623

Claims (10)

  1. 1. A plumbing structure for a centrifugal pump having an inlet end and an outlet end, comprising: The first pipeline is used for being connected with the inlet end of the centrifugal pump and comprises a first flexible pipe and a supporting structure, the first flexible pipe body is sleeved on the outer wall of the supporting structure, the supporting structure extends along the length direction of the first flexible pipe body, and the supporting structure is used for supporting the first flexible pipe along the radial direction of the first flexible pipe; The second pipeline is used for being connected with the outlet end of the centrifugal pump and comprises a second flexible pipe body and a constraint structure, the constraint structure is sleeved on the outer wall of the second flexible pipe body and extends along the length direction of the second flexible pipe body, and the constraint structure is used for limiting the second flexible pipe along the radial direction of the second flexible pipe.
  2. 2. A tubing structure for a centrifugal pump according to claim 1, wherein said support structure comprises at least one first wire extending in a spiral path along the length of said first flexible tube.
  3. 3. A pipe structure for a centrifugal pump according to claim 2, wherein the angle of elevation of the first wire is 5 ° to 20 °.
  4. 4. A tubing structure for a centrifugal pump according to claim 2, wherein the first wire has a cross-sectional diameter of 0.5mm to 2.5mm.
  5. 5. A pipe structure for a centrifugal pump according to any one of claims 1-4, wherein said support structure is fixed to said first flexible pipe body inner wall by means of an adhesive layer.
  6. 6. A tubing structure for a centrifugal pump according to claim 1, wherein said constraining structure comprises a plurality of second wires woven to intersect to form a cross-grid structure extending along the length of said second flexible tube.
  7. 7. A piping structure for a centrifugal pump according to claim 6, wherein said cross-grid structure has a braid density of 5 mesh to 12 mesh.
  8. 8. A pipe structure for a centrifugal pump according to claim 6, wherein the cross-sectional diameter of the second wire is 1.0mm to 2.0mm.
  9. 9. A pipe structure for a centrifugal pump according to any one of claims 6 to 8, wherein the constraining structure is protruded at both ends of the second flexible pipe body in the axial direction to form a reinforcing ring, the inner diameter of the reinforcing ring is smaller than the outer diameter of the second flexible pipe body, and the outer diameter of the reinforcing ring is larger than the outer diameter of the second flexible pipe body.
  10. 10. The piping structure for a centrifugal pump according to claim 9, wherein the width W of said reinforcing ring and the wall thickness T of said second flexible pipe body satisfy 1.2 t≤w≤2t.

Description

Pipeline structure for centrifugal pump Technical Field The utility model relates to the technical field of pipelines, in particular to a pipeline structure for a centrifugal pump. Background Centrifugal pumps are widely used in chemical industry, heating ventilation, fire protection, environmental protection and other fluid systems as common liquid conveying equipment. In practical application, centrifugal pumps are usually connected to front and rear pipes through hoses to achieve introduction and delivery of liquids. Since the centrifugal pump is operated, its inlet end is usually in a negative pressure state for drawing in liquid, while its outlet end is in a positive pressure state for discharging liquid to a downstream system. Therefore, the hose needs to bear the mechanical requirements of negative pressure and positive pressure under two different working conditions in the use process. However, the conventional hose structure is generally made of flexible materials, and is easy to collapse or suck flat in a radial direction under the negative pressure environment due to the action of external atmospheric pressure, so that a runner is contracted, and even liquid cannot be sucked normally in severe cases, so that the working efficiency of a pump is influenced or the system failure is caused. Meanwhile, under the positive pressure action born by the outlet end, if the hose body lacks a sufficient compression-resistant structure, the phenomena of bulge, bulge and even burst are easy to occur, and the system leakage or potential safety hazard is brought. At present, most of the solutions to the above problems are to replace hoses periodically, but the maintenance cost is greatly increased, and the reliability of the system is poor. Therefore, how to improve the hose structure so that it can adapt to the negative pressure and positive pressure environment is a technical problem to be solved in the art. Disclosure of utility model The utility model aims to provide a pipeline structure for a centrifugal pump, which aims to solve the technical problem that a hose structure is poor in stability in a positive-negative pressure environment in the centrifugal pump. In order to achieve the purpose, the pipeline structure for the centrifugal pump comprises a first pipeline and a second pipeline, wherein the first pipeline is used for being connected with an inlet end of the centrifugal pump, the first pipeline comprises a first flexible pipe and a supporting structure, the first flexible pipe body is sleeved on the outer wall of the supporting structure, the supporting structure extends along the length direction of the first flexible pipe body and is used for supporting the first flexible pipe along the radial direction of the first flexible pipe, the second pipeline is used for being connected with an outlet end of the centrifugal pump, the second pipeline comprises a second flexible pipe body and a constraint structure, the constraint structure is sleeved on the outer wall of the second flexible pipe body and extends along the length direction of the second flexible pipe body, and the constraint structure is used for limiting the second flexible pipe along the radial direction of the second flexible pipe. Optionally, the support structure comprises at least one first wire extending in a helical trajectory along the length of the first flexible pipe body. Optionally, the first wire has a helix angle of 5 ° to 20 °. Alternatively, the first wire has a cross-sectional diameter of 0.5mm to 2.5mm. Optionally, the support structure is fixed to the inner wall of the first flexible pipe body through an adhesive layer. Optionally, the constraining structure comprises a plurality of second wires woven to intersect to form a cross-lattice structure extending along the length of the second flexible pipe body. Alternatively, the weave density of the intersecting grid structure is 5 mesh to 12 mesh. Alternatively, the second wire has a cross-sectional diameter of 1.0mm to 2.0mm. Optionally, the restraint structure protrudes at two ends of the second flexible pipe body in the axial direction to form a reinforcing ring, the inner diameter of the reinforcing ring is smaller than the outer diameter of the second flexible pipe body, and the outer diameter of the reinforcing ring is larger than the outer diameter of the second flexible pipe body. Optionally, the width W of the reinforcing ring and the wall thickness T of the second flexible pipe body meet that W is less than or equal to 1.2T and less than or equal to 2T. The utility model has the beneficial effects that: Compared with the problems that in the prior art, the flexible hose is flattened and collapsed due to negative pressure at an inlet or is bulged and ruptured due to positive pressure at an outlet, so that the system flow is limited, the operation is unstable and the hose is frequently replaced easily, the application realizes the differential structural reinforcem