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CN-122014627-A - Spiral impeller type self-dredging anti-blocking slurry pump

CN122014627ACN 122014627 ACN122014627 ACN 122014627ACN-122014627-A

Abstract

The invention discloses a spiral impeller type self-dredging anti-blocking slurry pump, which belongs to the technical field of fluid conveying machinery and comprises a slurry pump body, a volute arranged on the slurry pump body and a spiral impeller rotatably arranged in the volute, wherein a base is arranged at the bottom of the slurry pump body, and a reducing pipe is coaxially and fixedly communicated with a feeding end of the volute. According to the invention, the front end of the spiral impeller is coaxially and fixedly connected with the fixed rod, the movable cutter is arranged at the position of the end part of the fixed rod extending into the reducer pipe, and the fixed cutter is matched with the inner wall of the reducer pipe, so that a rotary cutting and scattering structure which is completely and coaxially linked with the spiral impeller is formed, the pump shaft drives the impeller to convey slurry and synchronously drives the movable cutter to rotate, and a continuous shearing pair is formed with the fixed cutter, so that continuous forced disturbance and scattering can be formed on high-concentration slurry in the reducer pipe, long fibers in the slurry can be cut into short fibers in advance, and long-term stable operation of the slurry pump is ensured.

Inventors

  • TAN JUN
  • GU FANGYUAN
  • TANG ZHENG
  • HAN ZHUANGJUN
  • LV YONGFA

Assignees

  • 连云港鹏辰特种新材料有限公司

Dates

Publication Date
20260512
Application Date
20260320

Claims (10)

  1. 1. The utility model provides a spiral impeller formula is from leading anti-blocking slurry pump, includes slurry pump body (1), sets up spiral case (101) on slurry pump body (1), rotates and installs in spiral impeller (102) of spiral case (101) inside, and the bottom of slurry pump body (1) is equipped with base (2), and the feed end coaxial fixed intercommunication of spiral case (101) has reducing pipe (3), its characterized in that: The front edge of the feeding end of the spiral impeller (102) is coaxially and fixedly connected with a fixed rod (6), the fixed rod (6) extends into the inner cavity of the reducer pipe (3) along the axial direction of the reducer pipe (3), and at least one group of movable cutters (7) are arranged at the end part of the fixed rod (6) far away from the spiral impeller (102); The inner wall of the reducer pipe (3) is provided with a fixed cutter (4) matched with a movable cutter (7), and when the movable cutter (7) synchronously rotates along with the spiral impeller (102), a shearing pair for scattering slurry and cutting long fibers is formed with the fixed cutter (4); A telescopic mechanism (8) is arranged between the end part of the fixed rod (6) and the movable knife (7) and is used for driving the movable knife (7) to generate avoiding displacement when shearing resistance is overloaded; A buffer mechanism (5) is arranged between the bottom of the fixed knife (4) and the reducer pipe (3) and is used for buffering and protecting during rotary cutting operation.
  2. 2. The spiral impeller type self-dredging anti-blocking slurry pump according to claim 1, wherein the movable cutter (7) extends outwards along the radial direction of the fixed rod (6), the fixed cutter (4) extends inwards along the radial direction of the reducer pipe (3), the rotating track of the movable cutter (7) is overlapped with the mounting position of the fixed cutter (4) in the axial direction, and a shearing gap is reserved between the movable cutter (7) and the fixed cutter (4).
  3. 3. The spiral impeller type self-dredging anti-blocking slurry pump according to claim 1, wherein the buffer mechanism (5) comprises a fixed block (501), a groove (502), a rotating shaft (503), a cylindrical rod (504), a mounting groove (505) and a clockwork spring (506); The fixed block (501) is fixed on the inner wall of the reducer pipe (3), a groove (502) is formed in the top of the fixed block (501), a rotating shaft (503) is rotatably arranged in the groove (502), a cylindrical rod (504) is fixedly sleeved on the outer side of the rotating shaft (503), the cylindrical rod (504) is rotatably arranged in the groove (502) through the rotating shaft (503), and the bottom of the fixed knife (4) is fixedly connected with the outer wall of the cylindrical rod (504); Mounting grooves (505) are formed in the two ends of the cylindrical rod (504), a spring (506) is sleeved at the end part of the rotating shaft (503), the inner end of the spring (506) is clamped on the rotating shaft (503), and the outer end of the spring (506) is abutted with the inner wall of the mounting groove (505).
  4. 4. The spiral impeller type self-dredging anti-blocking slurry pump according to claim 1, wherein the telescopic mechanism (8) comprises a sliding groove (801), a sliding rod (802), a fixed seat (803), a limiting ring (804), a return spring (805), a spiral groove (806), a sliding block (807) and a positioning assembly; A sliding groove (801) is formed in the end, far away from the spiral impeller (102), of the fixed rod (6), a sliding rod (802) is slidably mounted in the sliding groove (801), a fixed seat (803) is fixedly connected to one end, close to the bottom of the sliding groove (801), of the sliding rod (802), a positioning assembly is arranged at one end, far away from the fixed seat (803), of the sliding rod (802), and a movable cutter (7) is connected with the sliding rod (802) through the positioning assembly; The outer wall of the sliding rod (802) is sleeved with a limiting ring (804), the limiting ring (804) is fixed on the inner wall of the sliding groove (801), a return spring (805) is sleeved on the outer side of the sliding rod (802), one end of the return spring (805) is abutted with the limiting ring (804), and the other end of the return spring (805) is abutted with the side edge of the fixed seat (803); The inner wall of the chute (801) is provided with a spiral groove (806), and the outer wall of the fixed seat (803) is fixedly connected with a sliding block (807) which is in sliding fit with the spiral groove (806).
  5. 5. The spiral impeller type self-dredging anti-blocking slurry pump according to claim 4, wherein the positioning assembly comprises a limiting block (808), a screw (809), a plug hole (810) and a positioning nut (811); the stopper (808) is fixed and is kept away from the one end of dead lever (6) in slide bar (802), and one side that slide bar (802) were kept away from to stopper (808) has linked firmly screw rod (809), and spliced eye (810) with stopper (808) adaptation have been seted up to movable knife (7), and positioning nut (811) threaded connection is in the extension of screw rod (809).
  6. 6. The spiral impeller type self-dredging anti-blocking slurry pump according to claim 1, wherein the fixed rod (6) and the spiral impeller (102) are of an integrally formed structure, and the axis of the fixed rod (6) is completely coincident with the rotation axis of the spiral impeller (102).
  7. 7. The spiral impeller type self-dredging anti-blocking slurry pump according to claim 1, wherein the reducer pipe (3) is a reducer straight pipe, the large-diameter end of the reducer pipe (3) is fixedly connected with a feed inlet of the volute (101), the small-diameter end of the reducer pipe (3) is a feed connection end, the fixed knife (4) is arranged in an inner cavity of a large-diameter section of the reducer pipe (3), and the rotation range of the movable knife (7) covers the transition area of the large-diameter section and the small-diameter section of the reducer pipe (3).
  8. 8. The spiral impeller type self-dredging anti-blocking slurry pump according to claim 4, wherein the sliding rod (802) is cylindrical, the diameters of two ends of the sliding rod (802) are different, the diameter of the sliding rod (802) in the sliding groove (801) is smaller than that of the exposed end, and in an initial state, the end face of the exposed end of the sliding rod (802) is attached to the end portion of the fixing rod (6).
  9. 9. The spiral impeller type self-dredging anti-blocking slurry pump according to claim 1, wherein the rotation direction of the movable cutter (7) is consistent with the rotation direction of the spiral impeller (102), an arc-shaped guide surface is formed on the material facing side of the movable cutter (7), and the material back side of the movable cutter (7) is subjected to round angle smooth transition treatment.
  10. 10. A spiral impeller type self-dredging anti-blocking slurry pump according to claim 3 is characterized in that a reinforcing rib is arranged between the outer side of the fixed cutter (4) and the cylindrical rod (504), and the reinforcing rib is far away from the material facing side of the movable cutter (7).

Description

Spiral impeller type self-dredging anti-blocking slurry pump Technical Field The invention relates to a slurry pump, in particular to a spiral impeller type self-dredging anti-blocking slurry pump, and belongs to the technical field of fluid conveying machinery. Background In the industrial fields of papermaking pulping, municipal sludge treatment, kitchen waste treatment, mine tailing conveying, chemical slurry production and the like, a slurry pump is core equipment for realizing the pipeline conveying of solid-containing and fiber-containing slurry, wherein the spiral impeller type slurry pump has better solid-containing medium trafficability as compared with a common closed centrifugal pump by virtue of the structural characteristics of wide flow passage and low shear, and becomes a main flow type selection of a high-concentration slurry conveying scene. However, in the actual long-term operation process, the feeding end of the existing slurry pump is usually connected with an upstream stock bin or a conveying pipeline through a reducing pipeline, the reducing section has a sudden change of a flow passage section, so that the slurry flow field is unevenly distributed, the problem of slurry accumulation bridging is easily caused, in addition, if the slurry contains long-fiber raw materials, the slurry is easily connected to the cutting edge of the front edge of an impeller and the transition part of a hub in a hanging manner in the suction process, and finally the problem of blocking and stopping is caused. For this purpose, a spiral impeller type self-dredging anti-blocking slurry pump is designed to optimize the problems. Disclosure of Invention The invention mainly aims to provide a spiral impeller type self-dredging anti-blocking slurry pump, which solves the problems that slurry accumulation bridging is easy to occur at a variable-diameter section of a pump inlet, and growth fibers are easy to wind and accumulate at the front edge of a spiral impeller. The aim of the invention can be achieved by adopting the following technical scheme: the spiral impeller type self-dredging anti-blocking slurry pump comprises a slurry pump body, a volute arranged on the slurry pump body, and a spiral impeller rotatably arranged in the volute, wherein a base is arranged at the bottom of the slurry pump body, and a reducing pipe is coaxially and fixedly communicated with the feeding end of the volute; the front edge of the feeding end of the spiral impeller is coaxially and fixedly connected with a fixed rod, the fixed rod extends into the inner cavity of the reducer pipe along the axial direction of the reducer pipe, and at least one group of movable cutters is arranged at the end part of the fixed rod, which is far away from the spiral impeller; the inner wall of the reducer pipe is provided with a fixed cutter matched with the movable cutter, and when the movable cutter synchronously rotates along with the spiral impeller, a shearing pair for scattering slurry and cutting long fibers is formed with the fixed cutter; a telescopic mechanism is arranged between the end part of the fixed rod and the movable knife and is used for driving the movable knife to generate avoiding displacement when shearing resistance is overloaded; and a buffer mechanism is arranged between the bottom of the fixed cutter and the reducer pipe and used for buffering and protecting during rotary cutting operation. Preferably, the movable knife extends outwards along the radial direction of the fixed rod, the fixed knife extends inwards along the radial direction of the reducer pipe, the rotating track of the movable knife is overlapped with the mounting position of the fixed knife in the axial direction, and a shearing gap is reserved between the movable knife and the fixed knife. Preferably, the buffer mechanism comprises a fixed block, a groove, a rotating shaft, a cylindrical rod, a mounting groove and a clockwork spring; The fixed block is fixed on the inner wall of the reducer pipe, the top of the fixed block is provided with a groove, a rotating shaft is rotatably arranged in the groove, a cylindrical rod is fixedly sleeved on the outer side of the rotating shaft, the cylindrical rod is rotatably arranged in the groove through the rotating shaft, and the bottom of the fixed knife is fixedly connected with the outer wall of the cylindrical rod; The mounting groove has been seted up at the both ends of cylinder pole, and the tip of pivot is located to clockwork spring cover, and clockwork spring's inner joint is in the pivot, clockwork spring's outer end and the inner wall butt of mounting groove. The telescopic mechanism comprises a chute, a slide bar, a fixed seat, a limiting ring, a return spring, a spiral groove, a slide block and a positioning component; the end part of the fixed rod, which is far away from the spiral impeller, is axially provided with a sliding groove, the sliding rod is slidably arranged in the sliding groove, the f