CN2421438Y

CN2421438Y - Water jet vacuum pump

Info

Publication number: CN2421438Y
Application number: CN 00235277
Authority: CN
Inventors: 方樟林
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-03
Filing date: 2000-05-03
Publication date: 2001-02-28
Anticipated expiration: 2010-05-03

Abstract

The utility model relates to a jet pump used for pumping vacuum, particularly a water jet vacuum pump made of the injection moulding of engineering plastics, and the pump has the advantages of high efficiency and energy saving. The utility model comprises nozzles with water inlets, air chambers with air suction openings, and a venturi tube having collapsible tubes, throat tubes, diffusion tubes, and with water outlets. The utility model is characterized in that the outlet sections of spraying nozzles are a star-shaped tube, and the size of the cross sections of which is gradually reduced along the directions of outlets. The utility model solves the problems of existing similar pumps, such as unreliable operation because of the block of the pumps in operation, electricity waste because of the strong resistances of the nozzles, low final vacuum, difficult production, bad accuracy, inconvenient packing and transportation, etc.

Description

Water injection vacuum pump

The utility model relates to a kind of jet pump that is used to vacuumize, especially with the water injection vacuum pump of engineering plastics molding and forming.

The existing water injection vacuum pump made from engineering plastics, it contains the Venturi tube of the air chamber of a nozzle of bringing the mouth of a river into, band intakeport and band collapsible tube, trunnion, diffusing tube, water outlet, wherein the collapsible tube semicircle cone angle on the Venturi tube is that 12 °-25 °, diffusing tube semicircle cone angle are 4 °-10 °, the outlet section of nozzle bottom is that its cross section is along the diminishing conical tube of Way out, its shortcoming is: 1) the semicircle cone angle because of Venturi tube collapsible tube, diffusing tube is bigger, so power consumption is big, rate of air sucked in required is less; 2) its Venturi tube is a monolithic construction, makes troubles not only for packing, transportation, and molding and forming is difficult, and yielding, low precision.Existing another kind of water injection vacuum pump, the energy-efficient water injection vacuum pump that provides as Chinese patent 93236241.9, its nozzle exit end has a plurality of spray orifices, and the direction of each spray orifice is pointed to spray centerline and is inclined to set, the shortcoming of this pump is: 1) its jet orifice structure increases the injection resistance greatly, so power consumption is many, and makes trouble; 2) because of there being the foreign material of leaf and so on to be blown in the circulation water channel unavoidably, so the outlet of nozzle is easy to blocking, work is not too reliable; 3) because of resistance to water-flow is big, so rate of air sucked in required is less, ultimate vacuum is not high.

The purpose of this utility model is to overcome the shortcoming that exists in the above-mentioned prior art, provides a kind of reliable operation, rate of air sucked in required the big and few water injection vacuum pump of power consumption, and makes it have the characteristics such as simple, that precision is high and transportation and packing are convenient of making.

The utility model water injection vacuum pump contains the Venturi tube of the air chamber of the nozzle of bringing the mouth of a river into, band intakeport and band collapsible tube, trunnion, diffusing tube, water outlet, and it is characterized in that: the outlet section of nozzle is that its cross-sectional sizes is along the diminishing star pipe of Way out.

In the utility model water injection vacuum pump, the star angle of star pipe can be the fillet of band arc transition, also can be wedge angle or trapezoidal angle, square angle, and with the complex angle of these plane geometric shape be combined intos.

Semicircle cone angle beta on preferably 3 °-5 ° of the semicircle cone angle gamma of the collapsible tube in the utility model water injection vacuum pump on the Venturi tube, the diffusing tube can be 1 °-3 °, and Venturi tube can be split into two-section at trunnion with the intersection of diffusing tube, and this two-section is connected with sealing gasket with flange.

The utility model has the advantages that: 1) the jet expansion section makes into after the star pipe, can make water injection vacuum pump be not easy blocking at work, so reliable operation; 2) angle of two semicircle cone angles on the Venturi tube diminishes, and spray resistance and reduce thereupon, thereby the power consumption of the utility model vacuum pump is few and degree of vacuum improves; 3) Venturi tube is changed into after the split by integral body, and injection mould can shorten, thus make more convenient and precision improves, and also the packed and transported of product is also easy because of shorten length.

Below will be by embodiment, and the contrast accompanying drawing is further described below the utility model.Have in the accompanying drawing:

Fig. 1, Fig. 2 are respectively the positive view and the plan views of the utility model water injection vacuum pump;

Fig. 3-Fig. 8 is the locational cutaway view Amplified image of A-A among Fig. 1; They express the sectional shape of the star pipe of nozzle lower exit section in the utility model water injection vacuum pump respectively, and wherein the star angle of star pipe is the fillet of band arc transition among Fig. 3 and Fig. 4; Star angle among Fig. 5 is a wedge angle; Star angle among Fig. 6 is trapezoidal angle; Star angle among Fig. 7 and Fig. 8 is square angle.

The structure of the utility model water injection vacuum pump can see from Fig. 1, Fig. 2 and Fig. 3, and it contains the Venturi tube 3 of the air chamber 2 of a nozzle of bringing the mouth of a river 11 into 1, a band intakeport 21 and band collapsible tube 31, trunnion 32, diffusing tube 34, water outlet 35; Air chamber 2 fuses with nozzle 1, Venturi tube 3 respectively by its upper and lower flange.

Nozzle in the utility model water injection vacuum pump, its top are that annulus cylindricality, lower exit section are one worn-out mouthful star pipes, and the cross-sectional sizes of this star pipe is dwindled from top to bottom gradually.The angle of the different shape in the planimetry can be adopted in the star angle of star pipe, as the fillet among Fig. 3 and Fig. 4, the wedge angle among Fig. 5, the square angle among trapezoidal angle, Fig. 7 and Fig. 8 among Fig. 6, or the complex angle of aforementioned each shape.The star angle quantity of star pipe can be selected according to actual needs, and the utility model is only to be with four star angles (as Fig. 3, Fig. 5, Fig. 6, shown in Figure 8) and to be with three star angles (as Fig. 4 and shown in Figure 7) as embodiment.

Venturi tube in the utility model water injection vacuum pump, semicircle cone angle beta=1.5 on semicircle cone angle gamma=3 on its collapsible tube 31 °, the diffusing tube °; Venturi tube is divided into two-section at trunnion 32 with the intersection of diffusing tube 34, and this two-section has the flange 33 that connects usefulness respectively, and is furnished with sealing gasket 36, is tightly connected so that be between this two-section.Venturi tube is made into split type by integral body, be convenient to the manufacturing and the packed and transported of the pump housing and improve its accuracy of manufacturing.

The utility model water injection vacuum pump, its nozzle with the star angle on the star pipe size of ejiction opening on some direction strengthened, thereby effectively prevent some tablets, as the obstruction of leaf and so on.The star pipe can be done all-in-one-piece molding and forming with whole nozzle, and it is easily manufactured.

The utility model water injection vacuum pump adopts the engineering plastics molding and forming, so corrosion-resistant.With the rate of air sucked in required is 180m ³The utility model water injection vacuum pump of/h is an example, and its power of motor is 5.5kw; As rate of air sucked in required is 360m ³/ h, then power of motor is 15kw; Ultimate vacuum all can reach 0.098mpa.

Claims

1, a kind of water injection vacuum pump, it contains the Venturi tube (3) of the nozzle (1) of bringing the mouth of a river (11) into, the air chamber (2) of being with intakeport (21) and a band collapsible tube (31), trunnion (32), diffusing tube (34), water outlet (35), it is characterized in that: the outlet section (12) of nozzle (1) is that its cross-sectional sizes is along the diminishing star pipe of Way out.

2, water as claimed in claim 1 sprays true pump, it is characterized in that: the star angle of said star pipe is the fillet of band arc transition.

3, water as claimed in claim 1 sprays true pump, it is characterized in that: the star angle of said star pipe is a wedge angle.

4, water as claimed in claim 1 sprays true pump, it is characterized in that: the star angle of said star pipe is trapezoidal angle.

5, water as claimed in claim 1 sprays true pump, it is characterized in that: the star angle of said star pipe is square angle.

6, spray true pump as claim 1 or 2 or 3 or 4 or 5 described water, it is characterized in that semicircle cone angle gamma on the said collapsible tube (31) is that semicircle cone angle beta on 3 °-5 °, diffusing tube (34) is 1 °-3 °, and said Venturi tube (3) is split into two-section at the intersection of the same diffusing tube of trunnion (32) (34), and is connected with sealing gasket (36) with flange (33) between this two-section.