Diaphragm cavity structure
A diaphragm cavity and stud technology, which is applied in the field of improvement of the structure of the diaphragm cavity, can solve the problems of wasting materials, high cost, and the improvement effect of the fatigue strength of the intersecting line structure of the diaphragm cavity is not obvious, and achieves convenient installation and simple structure Effect
Pending Publication Date: 2018-08-24
NFC SHENYANG PUMP IND
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Problems solved by technology
[0007] 4) The intersecting line structure belongs to the flow surface, which is easily eroded by the slurry and causes surface wear
At present, a variety of measures have been adopted to improve the fatigue strength of the diaphragm cavity discharge intersecting line structure: including increasing the size of the diaphragm cavity; processing rounded corners and finishing at the intersecting line structure to improve surface roughness; Better casting materials, etc., the above method has many disadvantages: such as increasing the size of the diaphragm cavity wastes materials and high costs, it is not easy to process rounded corners in the intersecting line structure, and the effect of improving the fatigue strength of the intersecting line structure of the diaphragm cavity is not obvious. Failure to meet the use requirements restricts the development of high-pressure and ultra-high-pressure diaphragm pumps
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[0022] The present invention includes a diaphragm cavity 1, the two sides of the diaphragm cavity 1 are respectively a feed port 21 and a discharge port 22, and it is characterized in that: the feed port 21 and the discharge port 22 are both provided with two pre-tightening studs 3. The two pre-tightening studs 3 are respectively arranged on both sides of the feed inlet 21 or the discharge port 22 , and the two pre-tightening studs 3 penetrate the diaphragm cavity 1 .
[0023] As a preferred solution of the present invention, the diaphragm cavity 1 is provided with a through-hole 4 that cooperates with the two pre-tightening studs 3 , and the end of the through-hole 4 is provided with an internal thread 5 that cooperates with the two pre-tightening studs 3 ; The head end of the through hole 4 is provided with a flat countersink 6 that cooperates with the nut 8 on the head of the pre-tightening stud 3 .
[0024] Further, a gasket 7 is arranged between the nut 8 and the counters...
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The invention relates to a diaphragm cavity structure, belongs to the technical field of diaphragm pumps, and particularly relates to the improvement of the diaphragm cavity structure. According to the diaphragm cavity applied to the high-pressure and ultrahigh-pressure diaphragm pump, the stress level of a diaphragm cavity feeding and discharging intersecting line structure is reduced, the fatigue service life of the diaphragm cavity is prolonged, so that the diaphragm cavity meets the strength use requirements under the high-pressure and ultrahigh-pressure working conditions. The structure comprises a diaphragm cavity body, and the two sides of the diaphragm cavity body are provided with a feeding port and a discharging port respectively; and the structure is characterized in that two pre-tightening studs are arranged at each of the feeding port and the discharging port, the two pre-tightening studs are arranged on the two sides of the feeding port or the two sides of the dischargingport correspondingly, and the two pre-tightening studs at each of the feeding port and the discharging port penetrate through the diaphragm cavity body.
Description
technical field [0001] The invention belongs to the technical field of diaphragm pumps, and in particular relates to an improvement of a diaphragm chamber structure. Background technique [0002] The diaphragm cavity is used to connect the inlet elbow and the outlet valve box, and supports the reciprocating movement of the diaphragm. It is one of the most critical components for the hydraulic end of the diaphragm pump to realize the suction and discharge of ore slurry. Its main function is to support the reciprocation of the large diameter diaphragm Movement, to complete the compression of the pulp, to realize the suction and discharge of the pulp. The suction and discharge of the ore slurry make the working pressure in the diaphragm chamber exhibit periodic alternating characteristics. Fatigue cracks and fractures are prone to occur in the stress-concentrated parts of the diaphragm cavity, resulting in leakage of the ore slurry, failure of the diaphragm pump to stop, and ex...
Claims
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IPC IPC(8): F04B43/02F04B53/00
CPCF04B43/02F04B53/00
Inventor 凌学勤张伟张艳林张洋蒋彪王江孙长明
Owner NFC SHENYANG PUMP IND