CN2353940Y

CN2353940Y - Low-pressure pneumatic continuous delivery pump

Info

Publication number: CN2353940Y
Application number: CN 98231330
Authority: CN
Inventors: 郑德明; 覃仁华
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-15
Filing date: 1998-09-15
Publication date: 1999-12-15
Anticipated expiration: 2008-09-15

Abstract

The utility model has the main structure that a receiving cavity (14) of an ejector (18) is provided with a ring-typed injection nozzle (5); the axial position of the injection nozzle (5) is regulated by a regulating tube (16); the lower end opening of a guide tube (11) of the ejector (18) is positioned above the injection nozzle (5), however, the outlet of the receiving chamber (14) is connected with a vertical tube type mixing tube (13); the other end of the mixing tube (13) is connected with the small end of a tapered diffusion tube (12); the lower end opening of a gasifying chamber (6) is connected with the upper end of the guide tube (11), however, the upper end opening is communicated with the discharge hole of the air lock (7); one end of a gasifying tube (10) extends into the gasification chamber (6), and is provided with a plurality of air-jetting holes; included angle between the guide tube (11) and the axial direction of the ring-typed injection nozzle (5) is 30 DEG to 60 DEG; a material flow control valve (8) is arranged on the feeding hole or the discharge hole of the air lock (7).

Description

The continuous transfer pump of low pressure strength

It is the continuous transfer pump of strength that power is carried powder and granule shape material with gas that the utility model relates to a kind of.

The continuous transfer pump of strength is widely used in the conveying of powder and granule shape material, as conveying of cement, breeze, metallic dust, pulverized fuel ash etc.But the strength transfer pump of prior art is perfect not to the utmost because of its work structuring design, and it is very limited that its transfer efficiency seems, also needs the gas of elevated pressures to make transmitting power, is unfavorable for reducing production costs.

The purpose of this utility model is, designs the continuous transfer pump of a kind of low pressure strength, and it is used as power with strength and carries out the continuous conveying of powder and granule shape material, and desired gas pressure is less relatively, and high working efficiency.

The technical solution of the utility model is, the continuous transfer pump of described low pressure strength comprises the liquid jetting device of band top honeycomb duct, air locking device, the mass flow control valve, be equipped with in the host cavity of described liquid jetting device of pump pin the ring type Laval nozzle that links to each other with the source of the gas pipe is housed, described source of the gas pipe is equipped with suction valve and regulates the threaded adjusting pipe of described ring type Laval nozzle axial position in host cavity, the lower end mouth of material guiding pipe is positioned at ring type Laval nozzle front end top, the outlet end of host cavity is connected to the mixing tube of inner chamber for straight tube, and the end in addition of mixing tube and being connected than small end of conic diffuse, its structure characteristic is, it also is provided with gasification chamber, and described material guiding pipe upper end-hole is connected with this gasification chamber lower end mouth, the discharge port tipping of air locking device is in the upper end-hole of gasification chamber, an end that has a gasifying pipe of gasification valve is communicated with the source of the gas pipe and the other end is connected in the gasification chamber and have some fumaroles on its tube wall, described honeycomb duct and ring type Laval nozzle angulation are 30 ° to 60 ° angles, and the mass flow control valve is contained in the material feeding mouth or the discharge port end of air locking device.

Make below in conjunction with accompanying drawing and to further specify.

Description of drawings:

Fig. 1 is the overall structure figure of the utility model band broken section;

Fig. 2 is the axial sectional structure chart of air locking device;

Fig. 3 is the structural drawing of air locking device axle head self compensation sealing mechanism;

Fig. 4 is the axial sectional structure of ring type Laval nozzle.

In described accompanying drawing:

1-pressure meter valve 2-pressure gauge 3-suction valve

4-gasification valve 5-ring type Laval nozzle 6-gasification chamber

7-air locking device 8-mass flow control valve 9-motor and speed reducer

10-gasifying pipe 11-honeycomb duct 12-diffusing tube

13-mixing tube 14-host cavity 15-pump pin

16-threaded adjusting pipe 17-source of the gas pipe 18-liquid jetting device

19-end cap 191-self compensation sealing mechanism 20-housing

21-material feeding mouth 22-Stamping Steel Ribbon 23-blade

24-impeller shaft 25-Stamping Steel Ribbon 26-discharge port

27-Stamping Steel Ribbon 271-Stamping Steel Ribbon 28-sprocket wheel

The inner circle of 29-sunk screw 30-31-seal ring

32-pressure spring 33-L shape foundary weight 34-body

35-bearing 36-stifle 37-sealing gasket

38-J shape oil sealing 39-trim ring 40-seal ring

41-overcoat 42-plunger 43-pin

Compression chamber before the cylinder chamber 45-fixed-wing 46-of 44-garden

The 47-connection chamber

As shown in Figure 1, the utility model comprise band top mozzle (11) ejector (18), flapper ( 7) mass flow control valve (8) is equipped with the host cavity (14) of the described ejector (18) of pump pin (15) In the ring type Laval nozzle (5) that same gas source pipe (17) is connected is housed, described gas source pipe (17) be equipped with into Air valve (3) and the described ring type Laval nozzle of adjusting (5) axial location in host cavity (14) (is namely schemed In 1 the position of move left and right) threaded adjusting pipe (16), by rotate this pipe (6) regulate described nozzle ( 5) axial location is to obtain best jeting effect; Mozzle (11) lower port be positioned at ring type Laval nozzle ( 5) front end top, the port of export of host cavity (14) is connected to the mixing tube that inner chamber is straight tube (13), and mixing tube (13) another end is connected than small end with conic diffuse (12), and its design feature is that it also is provided with gasification Chamber (6), the upper port of mozzle (11) is connected with the lower port of this gasification chamber (6), flapper (7) Discharging opening tipping in the upper port of gasification chamber (6), with an end of the vapor lamp (10) of gasification valve (4) Same gas source pipe (17) is communicated with and the other end is connected in the gasification chamber (6) and have some fumaroles on its tube wall, leads Stream pipe (11) and the axial angulation (being the axis angulation of described two members) of ring type Laval nozzle (5) It is a certain angle in 30 ° to the 60 ° scopes; Mass flow control valve (8) is contained in the charging of flapper (7) On mouth (as shown in Figure 1) or the discharging opening.

Referring to Fig. 1 and Fig. 2, a kind of practical structures of described flapper (7) is that it has band charging aperture (21) And the housing (20) of discharging opening (26), end cover (19) is equipped with at housing (20) two ends, be contained in housing ( 20) (referring to Fig. 1) has motor and (linking with it) reductor (9), described subtracting on the support of a side Speed machine power output shaft through the drive installation of sprocket chain strip transmission mechanism in housing (20) and by two end covers ( 19) impeller shaft (24) that shaft sleeve supports respectively its two ends rotates impeller shaft (24) two axial ends and corresponding close Between the shaft sleeve of end-blocking lid (19) self-compensation sealed mechanism (191) is housed; This self-compensation sealed mechanism (191) Structure be (referring to Fig. 3), in described shaft sleeve with the inner circle of band of sunk screw (29) fixed installation (30) in the body (34), this body (34) and annular space that impeller shaft (24) end becomes from the inside to the outside ( Be among Fig. 3 from right to left) be equipped with successively sealing ring (31), Compress Spring (32), L shaped foundary weight (33), Sealing ring (40), trim ring (39), J-shaped oil sealing (38), the inboard of sealing ring (31) is by the inner circle (30) Spacing, bearing (35) is contained in impeller shaft (24) top, and the port lining of described shaft sleeve is with behind the sealing gasket (37) Install stifle (36) additional; Referring to Fig. 1 and Fig. 2, described housing (20) inner chamber be a garden cylindricality and with impeller shaft ( 24) be total to axial line, some blades (23) be housed and the composition impeller on the impeller shaft (24), each blade (23) top Antiwear heat resisting sealing strip (22) or (25) that relative housing (20) inwall plays the hermetic seal effect all are equipped with on the end two sides, The two sides of the two side ends of each blade (23) also all is equipped with relative end cap (19) inner surface and is played the wear-resisting of hermetic seal effect Temperature resistant encapsulation bar (27) or (271) consist of in housing (20) thus and cut off charging aperture (21) and discharging opening (26) partition-type structures of gas circuit between, described sealing strip (22) (25) (27) (271) is to be installed in leaf with screw Detachable structure on the sheet (23), and can adopt antiwear heat resisting rubber or polytetrafluoroethylene (PTFE) (King) material Make. According to different needs, its charging aperture (21) and discharging opening (26) angulation can be designed to 90 ° extremely 180 ° of angles that scope is interior make described delivery pump become respectively delivery pump or the vertical transport thing of horizontal feed material The elevator pump of material etc.

Referring to Fig. 4, a kind of structure of described ring type Laval nozzle (5) is that it has an end is connection chamber (47) Overcoat (41), connection chamber (47) is in order to link to each other with gas source pipe, the other end of overcoat (41) is the garden cylinder chamber (44), be the front compression chamber (46) with tapering between connection chamber (47) and the garden cylinder chamber (44), press before this The littler end in contracting chamber (46) links to each other and axial line common with it with garden cylinder chamber (44), and the garden cylinder chamber has in (44) The plunger (42) that is partly consisted of by an end streamlined taper, middle part Cylinder, other end band tapering cylinder three, The tip of described streamlined taper is positioned at the garden cylinder chamber towards front compression chamber (46) and with the tapering cylinder than small end (44) port of export, the fixed-wing (45) that has same overcoat (41) to be connected on the streamlined taper, streamlined point Annular space between cone, middle part Cylinder, band tapering cylinder and overcoat (41) respective inner surfaces consists of respectively rear pressure Contracting chamber, critical surface chamber, expansion cavity. Described fixed-wing (45) can be designed in a garden on week equally distributed three And fixing with pin (43), the tapering of front compression chamber (46) can be selected to determine in 0.1 to 0.5 scope; Expansion The cross-sectional area of the chamber port of export (cross section perpendicular to axial direction) can be designed as the critical surface chamber sectional area 1.8 to 5 times, the operation principle of described nozzle is that working gas is entered by nozzle body left end shown in Figure 4, and is continuous through the cross section Air pressure further increases after the front compression chamber (46) that dwindles and the continuous compression of described rear compression chamber, when this gas advances When entering the critical surface chamber generation is reached the movement velocity of velocity of sound, reach supersonic speed through described expansion cavity ejection then, with The time produce high negative pressure, material is played swabbing action.

Working principle of the present utility model and process are, referring to Fig. 1, powder and granule shape material enters air locking device (7) by arrow A direction among the figure through mass flow control valve (8), the opening degree may command mass flow of described valve (8), and the material that enters air locking device (7) falls between each adjacent two blade (23) (impeller rotates under motivational drive), enter gasification chamber (6) then, mix the realization gasification with the gas of gasifying pipe (6) ejection, material after the gasification further falls to entering through honeycomb duct (11) host cavity (14) of liquid jetting device (18), the supersonic jet gas that ejects with described nozzle (5) in this chamber (14) mixes (gas by Fig. 1 in arrow B direction enter), and the negative pressure that is produced by nozzle (5) is involved in fluidized material in the jet and injects mixing tube (13); Material and gas mix in mixing tube (13) more, change part streams mixture kinetic energy into pressure energy simultaneously, enter diffusing tube (12) subsequently, because the continuous increase in diffusing tube (12) cross section, the flow velocity of its fluid-mixing reduces suddenly and pressure further raises, thus material is sent into conveyance conduit continuously according to arrow C direction among Fig. 1, realize the function of conveying material; Honeycomb duct (11) is provided with in described scope with nozzle (5) axis angulation, significantly improved the working efficiency of liquid jetting device (18), and another important measures that guarantee liquid jetting device (18) working efficiency are to keep its inner chamber negative pressure effect, and the utility model has been set up air locking device (7) thus.The working principle of the axle head self compensation sealing mechanism (191) of this air locking device (7) is (referring to Fig. 3); seal ring (31) (33) makes axle head and described shaft sleeve and end keep good gas tightness; when wearing and tearing take place in described seal ring (31) (33); pressure spring (32) can extend automatically and oppress described seal ring and continue the good described sealing state of protection; again because the Stamping Steel Ribbon (22) (25) (27) (271) on the blade (23) has good gas sealing ability with housing (20) internal chamber wall; can be evenly at described air locking device (7); continuously in the time of gasification chamber (6) feed; effectively cut off ambient atmos and entered air locking device (7) discharge port with in the lower chamber; guaranteed the effect of pump housing jet work; thereby effectively improved the efficient of transfer pump, can adopt the working gas of lower pressure to obtain satisfied conveying effect.

As known from the above, the utility model is the continuous transfer pump of a kind of low pressure strength, but level or vertical transport (lifting) powder and granule shape material, realized than big capacity, even, continuous conveying material under the lowpressure, have characteristics such as in light weight, that volume is little, device height is low, and I﹠M and use are all very convenient, reliable, simple to operate than other pneumatic transport equipment.

Embodiment: according to the utility model of accompanying drawing and said structure, design pressure 0.8Mpa, 0 ° to 200 ℃ of operating temperature, fed distance 350m, delivery head 30m, coupling air quantity 10 is to 40m ³/ min, pressure 0.15-0.8Mpa, conveying capacity is 8-50m ³/ h, equipment height overall 1240-1560mm; The material that send is the dry powdery material, and wherein 30% particle diameter is not more than 80 orders, allow to be not more than 5mm by unusual particle diameter, and its capacity must not be greater than 2.Also can adopt other air locking device and the ring type Laval nozzle of prior art.

Claims

1, the continuous transfer pump of a kind of low pressure strength, the liquid jetting device (18) that comprises band top honeycomb duct (11), air locking device (7), mass flow control valve (8), be equipped with in the host cavity (14) of liquid jetting device (18) of pump pin (15) the ring type Laval nozzle (5) that is connected with source of the gas pipe (17) is housed, described source of the gas pipe (17) is equipped with suction valve (3) and regulates the threaded adjusting pipe (16) of the axial position of described ring type Laval nozzle (5) in host cavity (14), honeycomb duct (11) lower end mouth is positioned at ring type Laval nozzle (5) front end top, the outlet end of host cavity (14) is connected to the mixing tube (13) of inner chamber for straight tube, and the end in addition of mixing tube (13) and being connected than small end of conic diffuse (12), its design feature is, it also is provided with gasification chamber (6), the upper end-hole of honeycomb duct (11) is connected with the lower end mouth of this gasification chamber (6), the discharge port tipping of air locking device (7) is in the upper end-hole of gasification chamber (6), an end that has a gasifying pipe (10) of gasification valve (4) is communicated with source of the gas pipe (17) and the other end is connected in the gasification chamber (6) and have some fumaroles on its tube wall, honeycomb duct (11) is an a certain angle in 30 ° to the 60 ° scopes with the axial angulation of ring type Laval nozzle (5), and mass flow control valve (8) is contained on the material feeding mouth or discharge port of air locking device (7).

2, the continuous transfer pump of low pressure strength according to claim 1, it is characterized in that, the structure of described air locking device (7) is, it has the housing (20) of band material feeding mouth (21) and discharge port (26), end cover (19) is equipped with at housing (20) two ends, be contained on the support of housing (20) one sides motor and speed reducer (9) are arranged, the pto of described speed reducer rotates in housing (20) and by the impeller shaft (24) that the shaft sleeve of two end covers (19) supports its two ends respectively through the drive installation of sprocket chain strip transmission mechanism, self compensation sealing mechanism (191) is housed between the shaft sleeve of impeller shaft (24) two axial ends and corresponding end cover (19), the structure of this self compensation sealing mechanism (191) is, in described shaft sleeve, enclose the body (34) of (30) with band the inner of sunk screw (29) fixed installation, in this body (34) and impeller shaft (24) annular space that the end became seal ring (31) is housed successively from the inside to the outside, pressure spring (32), L shaped foundary weight (33), seal ring (40), trim ring (39), J-shaped oil sealing (38), the inboard of seal ring (31) is spacing by the inner circle (30), bearing (35) is contained in impeller shaft (24) top, the port lining of described shaft sleeve is to install stifle (36) additional behind the sealing gasket (37), described housing (20) inner chamber be a garden cylindricality and with impeller shaft (24) shaft axis altogether, some blades (23) are housed on the impeller shaft (24) and form impeller, antiwear heat resisting Stamping Steel Ribbon (22) or (25) that relative housing (20) inwall plays the hermetic seal effect all are equipped with on each blade (23) two sides, top, antiwear heat resisting Stamping Steel Ribbon (27) or (271) that relative end cap (19) internal surface plays the hermetic seal effect also all are equipped with on the two sides of the two side ends of each blade (23), constitute the partition-type structures of cutting off gas circuit between material feeding mouth (21) and the discharge port (26) thus in housing (20).

3, the continuous transfer pump of low pressure strength according to claim 1, it is characterized in that, the structure of described ring type Laval nozzle (5) is, it has an end is connection chamber (47) and the other end is the overcoat (41) of garden cylinder chamber (44), it between connection chamber (47) and the garden cylinder chamber (44) the preceding compression chamber (46) of band tapering, should link to each other and shaft axis common with garden cylinder chamber (44) by the preceding less end of compression chamber (46) with it, have in the garden cylinder chamber (44) by an end streamline taper, the middle part Cylinder, the plunger (42) that the other end band tapering cylinder three partly constitutes, the tip of described streamline taper towards preceding compression chamber (46) and band tapering cylinder be positioned at garden cylinder chamber (44) outlet end than small end, the fixed-wing (45) that has same overcoat (41) to be connected on the streamline taper, the streamline taper, the middle part Cylinder, annular space between band tapering cylinder and overcoat (41) respective inner surfaces constitutes the back compression chamber respectively, the critical surface chamber, expansion cavity.