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CN-224228920-U - Pulp conveying mechanism of mixed flow type pulp pump

CN224228920UCN 224228920 UCN224228920 UCN 224228920UCN-224228920-U

Abstract

The utility model discloses a paper pulp conveying mechanism of mixed flow pulp pump relates to paper pulp and carries technical field, and the utility model discloses a mixed flow pump, mixed flow pump's input fixed mounting has the input tube, mixed flow pump's output fixed mounting has the output tube, the upper portion of input tube is equipped with protection machanism for protect the output tube, this application gets into the pressure tank under the differential pressure effect through partial paper thick liquid, promote inside piston upward movement, the piston compresses buffer spring through its top buffer rod, utilize the elastic potential energy of spring to carry out first-stage buffering to the impact force, the piston moves up simultaneously still can drive the sliding block through the drive connecting rod outwards to slide along the slide bar, and then compress both ends drive spring, form second grade elastic buffering, and then avoid pressure mutation directly to act on pipeline and pump body, thereby show and reduced the blasting tube, leak and equipment damage risk, improve whole conveying system's stationarity and durability.

Inventors

  • QI JIAYOU

Assignees

  • 杭州萧山美特轻工机械有限公司

Dates

Publication Date
20260512
Application Date
20250729

Claims (6)

  1. 1. The pulp conveying mechanism of the mixed flow pulp pump comprises a mixed flow pump (1) and is characterized in that an input pipe (11) is fixedly arranged at the input end of the mixed flow pump (1), an output pipe (12) is fixedly arranged at the output end of the mixed flow pump (1), a protection mechanism (2) is arranged at the upper part of the input pipe (11) and used for protecting the output pipe (12), and the protection mechanism (2) comprises: The water hammer adjusting assembly (21) comprises a pressure box (211) fixedly arranged at the upper part of the input pipe (11), the lower part of the output pipe (12) is fixedly arranged at one side of the pressure box (211), a piston (214) is clamped in the pressure box (211) in a sliding manner, a sliding rod (215) is fixedly arranged at the upper part of the pressure box (211), two symmetrically distributed sliding blocks (2151) are clamped in the upper part of the sliding rod (215) in a sliding manner, driving springs (217) are sleeved at two ends of the sliding rod (215), one end of each driving spring (217) is fixedly arranged at one side of the sliding block (2151), the other ends of the two driving springs (217) are fixedly arranged at the upper part of the pressure box (211), driving connecting rods (216) are movably arranged at the lower parts of the two sliding blocks (2151), the lower parts of the two driving connecting rods (216) are movably arranged at the middle parts of the top ends of the piston (214), and four uniformly distributed sleeves (218) are fixedly arranged on the upper surface of the inside of the pressure box (211); And a control unit (22) provided at the upper part of the input pipe (11) for controlling the outflow of water from the pressure tank (211).
  2. 2. The pulp transporting mechanism of a mixed flow pulp pump according to claim 1, wherein the control unit (22) comprises a check valve (221) fixedly installed at the upper part of the input pipe (11), an electric stop valve (222) is fixedly installed at one side of the output pipe (12), a control panel (213) is fixedly installed at one side of the upper part of the pressure tank (211), and the control panel (213) is integrated with a control module electrically connected with a driving motor of the electric stop valve (222).
  3. 3. The pulp conveying mechanism of a mixed flow pulp pump according to claim 1, wherein the water hammer adjusting assembly (21) further comprises buffer rods (2181) which are slidably clamped in the middle of the sleeve (218), rubber bases (219) are fixedly arranged at the bottom ends of the four buffer rods (2181), the bottom ends of the four rubber bases (219) are fixedly arranged at the top ends of the pistons (214), buffer springs (2182) are fixedly arranged at the top ends of the four buffer rods (2181), and the top ends of the four buffer springs (2182) are fixedly arranged on the upper surface of the interior of the sleeve (218).
  4. 4. The pulp conveying mechanism of a mixed flow pulp pump according to claim 2, wherein a pressure regulating valve (212) is fixedly arranged at the center of the top surface of the pressure tank (211) through a flange plate and a bolt set, and an electric actuating mechanism of the pressure regulating valve (212) is electrically connected with a control panel (213) through a shielding cable.
  5. 5. A pulp conveying mechanism of a mixed flow pulp pump according to claim 3, wherein the middle parts of the bottom ends of the four rubber bases (219) are fixedly embedded with pressure sensors (2191), the pressure sensors (2191) are connected with a control panel (213) through signal cables, and the control panel (213) can receive and analyze data collected by the four pressure sensors (2191).
  6. 6. The pulp conveying mechanism of a mixed flow pulp pump according to claim 1, wherein a plurality of groups of limiting blocks (13) which are distributed at equal intervals are fixedly arranged in the output pipe (12), and the limiting blocks (13) are used for blocking the instantaneous flow rate of water.

Description

Pulp conveying mechanism of mixed flow type pulp pump Technical Field The utility model relates to the technical field of pulp conveying, in particular to a pulp conveying mechanism of a mixed flow type pulp pump. Background In the field of pulp production and conveying, a mixed-flow pulp pump is taken as one of core equipment, and bears the key task of efficiently conveying high-viscosity and particle-containing pulp from a raw material tank or a preceding process to a subsequent working section (such as a paper machine, a bleaching tower and the like), when fluid such as pulp flows in a pipeline in the actual operation process, the flow speed is rapidly changed due to sudden start and stop of the pump, rapid opening and closing of a valve or abrupt change of working conditions, so that the phenomenon that the pressure of the fluid is greatly fluctuated (instantaneously increased or decreased), namely, a water hammer effect is caused, and the problems of pipeline vibration, burst, equipment sealing member abrasion and the like are caused. Reference is made to patent publication No. CN209724688U, publication No. 2019-12-03, which discloses a pulp pump, comprising a bearing housing portion, a pump shaft penetrating the bearing housing portion, a pump cover connected to the bearing housing portion, a sealing structure connected between the pump cover and the pump shaft, a first impeller connected to the pump shaft and in clearance fit with the pump cover, a second impeller connected to the pump shaft and in clearance fit with the first impeller, a lock nut connected to the pump shaft for pressing the second impeller, and a pump body connected to the pump cover for use in cooperation with the second impeller for conveying pulp, a first cavity is formed between the pump cover and the first impeller, a second cavity is formed between the first impeller and the sealing structure, the first cavity and the second cavity are arranged vertically after being projected from front to back, thereby overcoming the technical problem that the sealing effect of the single sealing structure is poor, and achieving a technical practical effect. Based on the search of patent numbers, the following defects in the prior art are combined: The traditional paper pulp conveying mechanism is provided with a simple water hammer protecting device such as a buffer tank or a one-way valve, has poor buffering or pressure releasing effect, cannot effectively influence high-frequency impact, causes unstable paper pulp flow rate to cause larger pressure fluctuation in a pipeline, can generate precipitation or cavitation in a local area to influence conveying continuity and uniformity, and lacks dynamic adjustment capability, and cannot automatically detect the start and stop operation of a mixed flow pump when the water hammer pressure exceeds a design threshold (such as abnormal start of the pump or pipeline blockage), so that equipment damage or pipeline blockage is easily caused. To this end, the present utility model provides a pulp transport mechanism for a mixed flow pulp pump. Disclosure of utility model The utility model aims to provide a pulp conveying mechanism of a mixed flow pulp pump, which aims to solve the problems that the traditional pulp conveying mechanism is simple in protective device, lack of dynamic adjustment and easy to cause equipment damage or pipeline blockage due to pressure fluctuation. The utility model is realized by the following technical scheme that the pulp conveying mechanism of the mixed flow pulp pump comprises a mixed flow pump, an input pipe is fixedly arranged at the input end of the mixed flow pump, an output pipe is fixedly arranged at the output end of the mixed flow pump, and a protection mechanism is arranged at the upper part of the input pipe and used for protecting the output pipe, and comprises: The water hammer adjusting component comprises a pressure box fixedly arranged at the upper part of the input pipe, the lower part of the output pipe is fixedly arranged at one side of the pressure box, a piston is arranged in the pressure box in a sliding manner, a sliding rod is fixedly arranged at the upper part of the pressure box, two symmetrically distributed sliding blocks are arranged on the upper part of the sliding rod in a sliding manner, driving springs are sleeved at two ends of the sliding rod, one ends of the two driving springs are fixedly arranged at one side of the sliding blocks, the other ends of the two driving springs are fixedly arranged at the upper part of the pressure box, driving connecting rods are movably arranged at the lower parts of the two sliding blocks, the lower parts of the two driving connecting rods are movably arranged at the middle part of the top end of the piston, and four uniformly distributed sleeves are fixedly arranged on the upper surface of the interior of the pressure box; and the control assembly is arranged at the upper part of the input pipe and is u