CN202833347U

CN202833347U - Steam injection vacuum pump low resistance nozzle structure

Info

Publication number: CN202833347U
Application number: CN 201220531013
Authority: CN
Inventors: 曹建松
Original assignee: NANTONG SAFE MACHINERY EQUIPMENT CO Ltd
Current assignee: NANTONG SAFE MACHINERY EQUIPMENT CO Ltd
Priority date: 2012-10-17
Filing date: 2012-10-17
Publication date: 2013-03-27
Anticipated expiration: 2022-10-17

Abstract

The utility model relates to a steam injection vacuum pump low resistance nozzle structure which comprises working nozzles, a mixing chamber and a diffusing chamber. The working nozzles extending into the mixing chamber are arranged at the front end of the mixing chamber. The back end of the mixing chamber is connected with the diffusing chamber in series. A suction inlet is formed in a side wall of the mixing chamber. The steam injection vacuum pump low resistance nozzle structure is characterized in that the working nozzles are a plurality of small working nozzles. The length of a diffusing section of each small working nozzle is 200 +/- 10 millimeters and the gradient of the diffusing section of each small working nozzle is 10 degrees. The steam injection vacuum pump low resistance nozzle structure has the advantages of being even in steam distribution, more even in mixing with gas being sucked, small in steam power loss and capable of improving vacuum supply effect.

Description

A kind of steam jet vaccum lower resistance nozzle arrangements

Technical field

The utility model relates to a kind of steam jet vaccum lower resistance nozzle arrangements, particularly a kind of steam jet vaccum lower resistance nozzle arrangements of bleeding effective.

Background technique

Steam jet vaccum lower resistance nozzle arrangements is because rate of air sucked in required is large, operating range is wide, simple in structure, the parts that do not have relative movement, be a kind of broad-spectrum vacuum equipment, be mainly used in the aspects such as degasification, decolouring, drying, deodorization, distillation, refrigeration and conveying.Particularly it is to sucking the gas non-selectivity, in food production, petrochemical industry, grease processing, production of polyester, contain the occasions such as the material of organic solvent is concentrated, compares with oil-sealed rotary pump and demonstrates remarkable advantage.

At present traditional steam jet vaccum lower resistance nozzle arrangements adopts the single nozzle structure, and distribution of steam is inhomogeneous, and is poor with the mixed effect of pumped gas, affects vacuumizing effect, the explosion chamber single stage compression, and the fluctuation of mixed gas velocity variations is larger, and pumping efficiency is low.

Summary of the invention

The technical problems to be solved in the utility model provides a kind of steam jet vaccum lower resistance nozzle arrangements of bleeding effective.

For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of steam jet vaccum lower resistance nozzle arrangements, comprise main jet, mixing chamber and explosion chamber, the mixing chamber front end is installed the main jet that stretches in the mixing chamber, mixing chamber rear end series connection explosion chamber, the mixing chamber sidewall is opened suction port, and explosion chamber is divided into compressing section, trunnion section and diffuser from front to back successively; Its innovative point is: described main jet is little main jet, and the circular arc of rounding off is adopted in the compressing section of little main jet, and the diffuser length of described little main jet is 200 ± 10mm, and the gradient is 10 °.

The utility model has the advantage of:

1 little main jet compressing section becomes arc transition by original straight transitions, and inside surface roughness reaches 0.4, has reduced the both vapor compression stroke, has reduced simultaneously resistance, has increased pumping efficiency;

2 little main jet diffuser length become original 2/3rds, and angle becomes 10 degree by original 14 degree, avoid overexpansion, allow steam owe to expand as nozzle exit the unskilled labourer, continue to expand at mixing chamber, when pumped gas pressure coincide under steam pressure and the design degree of vacuum, mixes, and spray into the explosion chamber compressing section, the minimizing power loss.

Description of drawings

Fig. 1 is the utility model steam jet vaccum lower resistance nozzle arrangements structural representation.

Fig. 2 is the medium and small main jet structural representation of the utility model.

Embodiment

As shown in Figure 1, mixing chamber 2 front ends are installed the main jet that stretches into mixing chamber 2, and the rear end arranges explosion chamber 3, and mixing chamber 2 sidewalls are opened suction port a.

Main jet is several little main jets 1, end socket is installed in the mixing chamber 2 front ends outside, the end socket inner chamber is communicated with the inlet end of little main jet 1, the end socket center goes into operation and makes steam inlet d, as shown in Figure 2, little main jet 1 arranges mixing section 11, compressing section 12 and diffuser 13 from front to back, and the circular arc of rounding off is adopted in the compressing section 12 of little main jet 1, the diffuser length of little main jet is 200 ± 10mm, and the gradient of little main jet diffuser is 10 °.

Claims

1. steam jet vaccum lower resistance nozzle arrangements, comprise main jet, mixing chamber and explosion chamber, the mixing chamber front end is installed the main jet that stretches in the mixing chamber, mixing chamber rear end series connection explosion chamber, the mixing chamber sidewall is opened suction port, and explosion chamber is divided into compressing section, trunnion section and diffuser from front to back successively; It is characterized in that: described main jet is little main jet, and the circular arc of rounding off is adopted in the compressing section of little main jet, and the diffuser length of described little main jet is 200 ± 10mm, and the gradient is 10 °.