CN-122014573-A - Split diaphragm chamber structure of diaphragm pump

CN122014573ACN 122014573 ACN122014573 ACN 122014573ACN-122014573-A

Abstract

The invention relates to the technical field of diaphragm pumps, in particular to a split diaphragm chamber structure of a diaphragm pump, which comprises a split diaphragm cavity, an anti-corrosion assembly, a rubber diaphragm, a cavity and a sealing plate, wherein the anti-corrosion assembly is detachably connected with the split diaphragm cavity through a connecting fastener and is arranged opposite to the split diaphragm cavity along the axial direction, the rubber diaphragm is clamped and fixed between the split diaphragm cavity and the anti-corrosion assembly, and the cavity is formed by encircling the split diaphragm cavity, the anti-corrosion assembly and the rubber diaphragm. According to the split diaphragm chamber structure provided by the invention, the medium inlet and outlet channels, the inlet and outlet valves and the connecting and mounting disc of the pipeline are integrated on the diaphragm chamber outer ring body, when vulnerable parts such as rubber diaphragms and the like are replaced, the inlet and outlet valves and the pipeline are not required to be disassembled, and only the connecting fastener of the anti-corrosion assembly and the split diaphragm chamber is required to be disassembled, so that the maintenance process is greatly simplified, and the equipment downtime is shortened.

Inventors

CHEN DEQUAN
SUN NANA
CHENG MEI
XIAO QIFENG
ZHANG CHUN
WU WENWEI
HUANG YIJIAN

Assignees

上海福思特流体机械有限公司

Dates

Publication Date: 20260512
Application Date: 20260330

Claims (12)

1. The utility model provides a split type diaphragm chamber structure of diaphragm pump, includes split type diaphragm cavity, its characterized in that still includes: The anti-corrosion assembly is detachably connected with the split type diaphragm cavity through a fastener and is arranged opposite to the split type diaphragm cavity along the axial direction; The rubber diaphragm is clamped and fixed between the split diaphragm cavity and the anti-corrosion component; the cavity is formed by enclosing the split type diaphragm cavity, the anti-corrosion component and the rubber diaphragm.
2. The split diaphragm chamber structure of claim 1, wherein the split diaphragm chamber is formed by assembling a diaphragm chamber bottom, an O-shaped sealing ring, a spacer ring, a rectangular sealing ring, a diaphragm chamber outer ring body, and a dynamic load prestress bolt and nut, the O-shaped sealing ring is arranged on a matching surface of the diaphragm chamber bottom and the spacer ring, the diaphragm chamber bottom, the O-shaped sealing ring and the spacer ring are assembled with the diaphragm chamber outer ring body after being combined, and the rectangular sealing ring is arranged at a junction of the three.
3. The split diaphragm chamber structure of claim 2, wherein the outer ring of the spacer ring is provided with a preset groove, and the preset groove is movably clamped with the top of the bottom of the diaphragm chamber.
4. The split diaphragm chamber structure of claim 2, wherein the diaphragm chamber outer ring body is of a completely symmetrical structure, the upper end and the lower end of the diaphragm chamber outer ring body are axially symmetrically provided with mounting plates, the mounting plates are provided with connecting holes, and the left end face and the right end face of the diaphragm chamber outer ring body are respectively provided with a circle of uniformly distributed dynamic load threaded holes.
5. The split diaphragm chamber structure of claim 2, wherein the corrosion protection assembly comprises a diaphragm chamber inner liner and a diaphragm chamber end gland, and the diaphragm chamber inner liner is fixedly connected with the diaphragm chamber end gland through a connecting bolt.
6. The split diaphragm chamber structure of claim 5, wherein the thickness of the middle portion of the diaphragm chamber end gland is greater than the thickness at the edge bolt hole.
7. The split diaphragm chamber structure of claim 5, wherein the chamber is formed on one side of the inner liner of the diaphragm chamber, a compressing part is arranged on the outer circumference of the chamber, a compressing groove is formed at the position of the inner cavity of the spacing ring, and the edge of the rubber diaphragm is clamped and fixed with the compressing groove through the compressing part in a matching manner.
8. The split diaphragm chamber structure of claim 7, wherein the diaphragm chamber outer ring body is in press fit with the diaphragm chamber inner body, and the joint of the diaphragm chamber outer ring body and the diaphragm chamber inner body is sealed by the rectangular sealing ring.
9. The split diaphragm chamber structure of claim 5, wherein a passageway is provided on a side of the diaphragm chamber inner liner away from the chamber, two ends of the passageway are respectively an inlet and an outlet, and an inlet/outlet overlapping with the passageway is provided on the diaphragm chamber outer ring.
10. The split diaphragm chamber structure of claim 2, wherein the spacer ring and the diaphragm chamber outer ring body are in contact with a transmission medium and are made of corrosion-resistant materials such as stainless steel and titanium.
11. The split diaphragm chamber structure of claim 4, wherein one side of said coupling hole is connected with an inlet/outlet valve.
12. The split diaphragm chamber structure of claim 1, wherein a hydraulic oil chamber is correspondingly formed on one side of the rubber diaphragm away from the chamber, and the O-ring is used for preventing hydraulic oil in the hydraulic oil chamber from leaking.

Description

Split diaphragm chamber structure of diaphragm pump Technical Field The invention relates to the technical field of diaphragm pumps, in particular to a split diaphragm chamber structure of a diaphragm pump. Background Under the current industrial development background, metallurgical industries such as zinc smelting, nickel cobalt smelting and the like are in an explosive development situation at sea and abroad, and a more energy-saving and efficient hydrometallurgical process is generally adopted, so that the demands of markets for corrosion-resistant diaphragm pumps are increasing. As key equipment in the hydrometallurgy process, the corrosion-resistant diaphragm pump is required to have excellent corrosion resistance, so that safety and stability can be ensured in the working condition of contacting with corrosive slurry solution (medium conveyed by the pump), and sometimes the corrosion-resistant diaphragm pump also needs to be capable of being operated in a high-temperature and high-pressure working environment, so that the problem of acid corrosion aggravation caused by the active ions of the solution when the temperature is increased is solved, and the chemical reaction of the hydrometallurgy requires that the corrosion-resistant diaphragm pump can ensure long-term no leakage and other faults, and realizes stable operation. The diaphragm chamber of the diaphragm pump is used as a core bearing component, and the diaphragm cavity and the diaphragm chamber cover of the diaphragm pump are usually large castings, and the diaphragm chamber is large in size and heavy in weight. In the diaphragm chamber structure of the traditional corrosion-resistant diaphragm pump, the diaphragm chamber cover is provided with an inserting part which is matched with the diaphragm chamber to fix the rubber diaphragm together, and the transmitted corrosive medium is required to be conveyed through the inlet of the diaphragm chamber, the through hole of the inserting part and the outlet of the diaphragm chamber in sequence. In the process, the diaphragm cavity and the diaphragm chamber cover are both in direct contact with corrosive media, so that the diaphragm cavity and the diaphragm chamber cover are both manufactured by adopting corrosion-resistant materials such as stainless steel or titanium alloy. The method not only causes great manufacturing difficulty and high production cost of the castings, but also needs to inspect and even replace the whole diaphragm cavity or the diaphragm chamber cover when the parts are corroded locally, thereby obviously increasing the maintenance cost of equipment, prolonging the equipment shutdown time and seriously affecting the continuous operation rate and the profitability level of the user equipment. In order to solve the problem of overhigh cost of the traditional structural materials, an improved diaphragm chamber structure of a diaphragm pump is disclosed in the prior art (application publication number: CN 120798752A). The structure completely blocks the corrosive medium from the diaphragm cavity through the rubber diaphragm, so that the diaphragm cavity can be manufactured by adopting a common carbon steel casting, the material cost of the diaphragm cavity is effectively reduced, the diaphragm cavity structure is simplified, and the generation of casting defects is reduced. However, the improved structure still has obvious defects that on one hand, the structure of the corrosion-resistant diaphragm chamber cover is more complex than that of the traditional diaphragm chamber cover due to the fact that a medium channel is integrated on the corrosion-resistant diaphragm chamber cover, the structures such as a reinforcing rib, an inlet and outlet mounting disc and a transition angle of the cover surface between the outer side of the medium channel and the cover surface are more complex, casting difficulty and component weight are increased, the stress condition of the components is more complex, and on the other hand, as the inlet and outlet mounting disc of the corrosion-resistant diaphragm chamber cover is directly connected with an inlet and outlet valve and a pipeline, when a rubber diaphragm serving as a vulnerable part needs to be replaced, the heavy diaphragm chamber cover can be removed only by removing a closing bolt on the circumference of the diaphragm chamber cover, an inlet and outlet mounting bolt and a closing bolt on the inlet and outlet valve, and the like, so that maintenance difficulty is greatly increased, equipment shutdown time is prolonged, and double requirements of cost control and maintenance convenience are not met for a large-sized reciprocating diaphragm pump or a small pneumatic diaphragm pump. In summary, the existing diaphragm chamber structure of the diaphragm pump has the problems of high manufacturing cost and high maintenance cost, or after the cost of part of materials is reduced, the structural complexity is improved, the maintenance difficulty is