CN-224228850-U - Plunger pump cylinder body

CN224228850UCN 224228850 UCN224228850 UCN 224228850UCN-224228850-U

Abstract

The utility model relates to a plunger pump cylinder body which comprises a metal outer cylinder body and a plastic inner cylinder body, wherein the plastic inner cylinder body is arranged in the metal outer cylinder body, one end part of the plastic inner cylinder body is provided with an inner groove, the other end part of the plastic inner cylinder body is provided with an outer flanging, a half fixing ring is arranged in the inner groove, two end parts of the metal outer cylinder body are positioned between the outer flanging and the half fixing ring, the outer flanging and the half fixing ring form a limiting combination, and the metal outer cylinder body and the plastic inner cylinder body are fixedly connected through the limiting combination. The half fixing ring has the beneficial effects that the half fixing ring can increase the fixedly connecting strength between the plastic inner cylinder body and the metal outer cylinder body, so that the plastic layer cannot deform, fall off and crack, the defects that the plastic lining layer of the plunger pump cylinder body can be shrinked, deformed and fall off by high negative pressure of the plunger pump and the lining is torn are overcome, the quality of the plunger pump is improved, and the plunger pump cylinder body has good negative pressure resistance, positive pressure resistance, cracking resistance and deformation resistance.

Inventors

DU JIEXING
JIANG LONGFU
WANG YUEPING
JIANG LINGCHAO
GAO JINLONG
JIANG CHAO

Assignees

宜兴市宙斯泵业有限公司

Dates

Publication Date: 20260512
Application Date: 20250513

Claims (6)

1. A plunger pump cylinder body is characterized by comprising a metal outer cylinder body and a plastic inner cylinder body, wherein the plastic inner cylinder body is arranged inside the metal outer cylinder body, one end part of the plastic inner cylinder body is provided with an inner groove, the other end part of the plastic inner cylinder body is provided with an outer flanging, a half fixing ring is arranged in the inner groove, two end parts of the metal outer cylinder body are positioned between the outer flanging and the half fixing ring, a limiting combination is formed by the outer flanging and the half fixing ring, and the metal outer cylinder body and the plastic inner cylinder body are fixedly connected through the limiting combination.
2. The plunger pump cylinder as set forth in claim 1, wherein said half fixing ring is made of metal.
3. The plunger pump cylinder according to claim 1, wherein the wall thickness of the plastic inner cylinder is 20-25mm if the diameter of the inner cavity of the plunger pump cylinder is within 200 mm mm, and is 50-80 mm if the diameter of the inner cavity of the plunger pump cylinder is 500-600 mm.
4. The plunger pump cylinder as set forth in claim 1, wherein the plastic inner cylinder is made of polyether-ether-ketone material, fluoroplastic material or polyethylene material with a molecular weight of 300-700 ppm.
5. The plunger pump cylinder as set forth in claim 1, wherein said plastic inner cylinder is an epoxy material filled with silicon carbide and/or quartz sand.
6. The plunger pump cylinder as set forth in claim 1, wherein said metal outer cylinder is a carbon steel material.

Description

Plunger pump cylinder body Technical Field The utility model belongs to the technical field of plunger volumetric type slurry pumps, and particularly relates to a plunger pump cylinder body. Background Plunger volumetric slurry pumps have been widely used in the industrial fields of mineral separation, coal and wet smelting, etc. When the pump works, the pressure between the pump cylinder body and the plastic lining layer is easy to be extruded under the high pressure of fluid, and the plastic lining layer can be shrunken and deformed under the high negative pressure of the plunger pump, so that the plastic lining layer is stretched, deformed and even cracked and shed, and when the temperature of the slurry to be conveyed is higher than 60 ℃, the deformation condition of the plastic lining layer can seriously influence the normal operation of the pump. Therefore, it is important to design a high-strength plunger pump cylinder body with a lining layer, which is firm, not easy to deform and fall off, wear-resistant, corrosion-resistant and impact-resistant. Disclosure of utility model The utility model aims to overcome the defects in the prior art and provides a plunger pump cylinder body. A plunger pump cylinder body comprises a metal outer cylinder body and a plastic inner cylinder body, wherein the plastic inner cylinder body is arranged inside the metal outer cylinder body, one end portion of the plastic inner cylinder body is provided with an inner groove, the other end portion of the plastic inner cylinder body is provided with an outer flanging, a half fixing ring is arranged in the inner groove, two end portions of the metal outer cylinder body are located between the outer flanging and the half fixing ring, the outer flanging and the half fixing ring form a limiting combination, and the metal outer cylinder body and the plastic inner cylinder body are fixedly connected through the limiting combination. Preferably, the half fixing ring is made of metal. The wall thickness of the plastic inner cylinder body can be determined according to the diameter of the inner cavity of the plunger pump cylinder body, wherein the wall thickness of the plastic inner cylinder body is 20-25 mm if the diameter of the inner cavity of the plunger pump cylinder body is within 200mm, the wall thickness of the plastic inner cylinder body is 50-80 mm if the diameter of the inner cavity of the plunger pump cylinder body is 500-600 mm, and therefore suction force of high negative pressure generated when the plunger pump works in a mechanical sealing suction state on the plastic inner cylinder body can be prevented. The plastic inner cylinder body is preferably made of polyether ether ketone (PEEK) material, fluoroplastic material or polyethylene material with the molecular weight of 300-700 ten thousand, and the plastic is high in temperature resistance and corrosion resistance. The plastic inner cylinder body is preferably made of epoxy resin filled with silicon carbide and/or quartz sand, and has high temperature resistance and good wear resistance. Preferably, the metal outer cylinder is made of carbon steel. The beneficial effects of the utility model are as follows: The half fixing ring designed by the utility model can increase the fixedly connecting strength between the plastic inner cylinder body and the metal outer cylinder body, so that the plastic layer cannot deform, fall off and crack, the defects that a plastic lining layer of the plunger pump cylinder body can be shrinked, deformed and fall off by high negative pressure of the plunger pump in the prior art are overcome, the quality of the plunger pump is improved, and the plunger pump cylinder body has good negative pressure resistance, positive pressure resistance, cracking resistance and deformation resistance. Drawings FIG. 1 is a schematic view of the structure of a plastic inner cylinder; Fig. 2 is a schematic structural view of a huff-fixing ring. The reference numerals indicate the metal outer cylinder body 1, the plastic inner cylinder body 5, the inner groove 7, the outward flange 8 and the half fixing ring 9. Detailed Description The utility model is further described below with reference to examples. The following examples are presented only to aid in the understanding of the utility model. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present utility model without departing from the principles of the utility model, and such modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims. Example 1 As shown in fig. 1 and 2, the plunger pump cylinder comprises a metal outer cylinder body 1 and a plastic inner cylinder body 5, wherein the plastic inner cylinder body 5 is arranged inside the metal outer cylinder body 1, one end part of the plastic inner cylinder body 5 is provided with an inner groove 7, the other end part of the plast