CN109382009B - Automatic rotary powder distributing device for nozzle of pulsating vacuum jet pump - Google Patents
Automatic rotary powder distributing device for nozzle of pulsating vacuum jet pump Download PDFInfo
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- CN109382009B CN109382009B CN201811100005.6A CN201811100005A CN109382009B CN 109382009 B CN109382009 B CN 109382009B CN 201811100005 A CN201811100005 A CN 201811100005A CN 109382009 B CN109382009 B CN 109382009B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
- B01F25/21—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
- B01F25/212—Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers the injectors being movable, e.g. rotating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
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- Dispersion Chemistry (AREA)
- Jet Pumps And Other Pumps (AREA)
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Abstract
The invention relates to an automatic rotary material distribution device for powder of a nozzle of a pulsating vacuum jet pump.A left bearing support frame and a right bearing support tube are fixedly arranged at the upper end of a fixed plate at intervals, the upper parts of the left bearing support frame and the right bearing support tube are coaxially sleeved with a rotary hollow shaft, the middle part of the rotary hollow shaft is provided with a rotary wheel in a limiting way through a flat key, and the right end of the rotary hollow shaft is coaxially connected with an inlet of a pressurizing chamber of the jet pump nozzle; a jet flow spray pipe is coaxially sleeved and fixed in the rotating hollow shaft, the right end of the jet flow spray pipe is inserted into a pressurizing chamber connected with a jet pump nozzle, and the port of the right end of the jet flow spray pipe is of an asymmetric structure. The jet nozzle of the device has the characteristics of rotatability and asymmetric structure, and can generate periodically-changed pulsating vacuum, so that powder can be uniformly distributed before entering a jet area, the powder is not piled into blocks, the flowability is good, the phenomenon of sticking together of the powder is avoided, and the idle running of a jet pump system is prevented.
Description
Technical Field
The invention belongs to the field of chemical equipment, relates to a solid-liquid mixed jet pump, and particularly relates to an automatic rotary powder distribution device for a nozzle of a pulsating vacuum jet pump.
Background
Jet pumps are important unit operations in chemical industry, and are fluid machinery and mixed conveying reaction equipment which transfer energy and mass by using the diffusion effect of strong shear and severe turbulence between high-speed jet and sucked fluid. The jet pump has the characteristics of simple structure, stable process, convenient installation, strong process adaptability, low production cost and the like, so that the jet pump has wider and wider application range, and can replace water ring type, rotary vane type and reciprocating vacuum pumps under certain vacuum conditions.
The research and application of jet pumps has been long-lived, and the phenomenon of mixing of jets was discovered earlier than in the 16 th century. With the development of fluid mechanics and aerodynamic theory and applications, the jet technology has also improved greatly. Jet pumps, as a general-purpose device that can produce great economic benefits, have shown an increasingly important role in human economic life. The jet nozzle structure is taken as a basic and simple physical conveying and mixing method for many years, does not consume medicament, does not have secondary pollution, has low operation and maintenance cost, and is always a hot point of research of scholars at home and abroad, so that more efficient and energy-saving jet nozzles are promoted to be invented. These design results have been applied in the fields of petroleum and chemical industry in developed countries. Developed countries now acquire a lot of data through a lot of experiments and obtain many patents, which bring great economic benefits to them. However, the design of a jet pump system must take into account the expected efficiency mechanism, which is not sufficient in current research; the numerous factors restricting the jet flow efficiency and the mechanism of jet flow jet vacuum formation are not deeply understood, and the conditions for forming the optimal efficiency point are not mastered, so that a device with higher efficiency and energy conservation is difficult to design.
The jet pump system achieves the aim of conveying a solid-liquid mixture by using high-speed flowing liquid sprayed by a jet nozzle, and in the process, the feeding efficiency of the jet nozzle of the jet pump directly influences the efficiency of the jet pump system, so that how to improve the efficiency of the jet pump system is very important. It is worth noting that the distribution device at the feed inlet of the jet pump nozzle also has a certain influence on the overall efficiency of the system. For example, the humidity of a powder product (such as starch) added into a jet pump nozzle is too high, the humidity of the powder is too high due to wet weather, and excessive feeding of an operator can cause the powder at a feed opening inside the jet pump jet nozzle to be excessively accumulated into blocks, commonly called as 'lump materials', so that the powder cannot freely slide down by the gravity of the powder and cannot be sucked into the jet pump nozzle under the jet vacuum generated by the jet pump jet nozzle, and the idle running of a jet pump system is caused, namely the efficiency bottleneck of the jet pump is generated. Therefore, under the condition that no jet pump nozzle feeding hole distributing device exists, an operator cannot stir and distribute the powder by using an iron stick, because a large amount of dust can exist in a workshop when the operator feeds the jet pump nozzle, and the dust can explode when encountering open fire. Therefore, an operator can only use a wooden stick to distribute and dredge the bottleneck of the feed opening, which artificially increases the investment of labor cost; and the quality of the product is difficult to guarantee when the wood chips fall into the hopper. Therefore, the traditional system design method does not carry out material distribution synergy on the inner feeding hole of the jet pump nozzle, so that a large amount of manpower and material resources are input, and possible potential safety hazards exist, so that the efficiency of the jet pump system is reduced, and the jet pump system is not economical and environment-friendly.
The automatic rotary powder distributing device for the nozzle of the pulsating vacuum jet pump is researched and aims to realize that the jet nozzle has the characteristics of rotatability and an asymmetric structure, so that the device can generate periodically-changed pulsating vacuum which can cause the solid powder to generate an unstable pulsating state of looseness and accelerated sliding in the process of entering the jet nozzle, so that the powder can be uniformly distributed before entering a jet area, the powder is not accumulated into blocks and has good fluidity, the phenomenon of 'lump material' is avoided, the idle running of a jet pump system is prevented, and the bottleneck of the efficiency of the jet nozzle is also prevented. The device does not need to add extra energy power, and safe and reliable, energy-concerving and environment-protective to reach the purpose that improves the efficiency of system through reforming transform to efflux pump nozzle self structure. The pulsating jet formed by the device will assist in the turbulent mixing of the jet slurry and the solid powder. On the other hand, whether the powder unloading in the operating personnel can be normal through observing the hopper, also can judge whether efflux vacuum reaches the anticipated vacuum degree, consequently, the device can realize the visual control of jet pump system efficiency. The research is beneficial to exploring and researching a design method and a design concept which are beneficial to improving the jet flow efficiency.
The application of the material distribution device for the nozzle feed inlet of the jet pump is based on the development research on the patent research basis of a high-efficiency jet nozzle (ZL201410539286.0) capable of continuously adjusting the position of a jet spray pipe. The technology is an economical jet nozzle without a pulsating vacuum jet pump nozzle powder automatic rotating distribution device, and the principle is as follows: high pressure liquid is injected into the jet nozzle by a high pressure liquid delivery pump (3-6 atmospheres) and enters the pressurizing chamber A of the jet nozzle. As the cross-sectional area of the pressurizing chamber A is gradually reduced, the potential energy of the liquid is reduced and the kinetic energy of the liquid is increased, so that the jet speed of the liquid is greatly increased when the liquid passes through the outlet of the pressurizing chamber A, and a jet effect is formed. The liquid flowing at high speed is sprayed into a diffusion shape through the vacuum mixing chamber B, the occupied space volume is increased, part of air is entrained to enter the expansion chamber C, the space volume of the liquid is further increased, and then the liquid enters the conveying pipeline with the same diameter as the outlet end of the expansion chamber C. The high-speed flowing liquid generates vacuum in the process of passing through the pressurizing chamber A to the expansion chamber C, and powdery solid which slides freely is sucked into the mixing chamber and enters the expansion chamber C after being mixed with the high-speed liquid which enters continuously. The mixed liquid returns to the back slurry tank through the conveying pipeline, is sucked by the high-pressure liquid conveying pump again, and then is injected into the jet nozzle to form a cycle.
The defects of the technology are as follows: the automatic rotary powder distributing device for the nozzle of the pulsating vacuum jet pump is developed and aims to provide a device for automatically distributing powder by rotating the nozzle of the pulsating vacuum jet pump, which has the characteristics of rotatability and asymmetric structure, so that the device can generate periodically-changed pulsating vacuum, and the pulsating vacuum can cause the solid powder to generate an unstable pulsating state of looseness and accelerated sliding down in the process of entering the jet nozzle, so that the powder can be uniformly distributed before entering a jet area, is not accumulated into blocks, has good fluidity, avoids 'lump materials', prevents the idle running of a jet pump system, and prevents the efficiency bottleneck of the jet nozzle. The traditional system design method is that the default solid powder flows into a free gliding flow state after entering a hopper and directly enters a jet pump nozzle, and the distribution state of powder in the flow process is not enhanced, so that a large amount of waste of fluid kinetic energy and potential energy is caused, and the system efficiency is reduced. Intuitively, it appears that: the powder product (such as starch) humidity that adds in the jet pump nozzle is too big, the wet weather arouses that powder humidity is too big to and operating personnel's excessive feeding can arouse the inside feed inlet department powder of jet pump jet nozzle to excessively pile up the piece, commonly known as "the material that sticks together", lead to the powder can not rely on self gravity free gliding, also can not be inhaled in the jet nozzle under the efflux vacuum effect that jet pump jet nozzle produced in, cause jet pump system idle running, produce jet nozzle efficiency bottleneck promptly.
In fact, the jet pump nozzle in fig. 1 is an economical jet pump nozzle submachine obtained by experiments by taking a patent of high-efficiency jet nozzle (ZL201410539286.0) capable of continuously adjusting the position of a jet spray pipe as a mother machine. The jet flow nozzle is a jet flow nozzle with higher efficiency obtained by a penman on the basis of long-term practical application and experiments, and the efficiency of the jet flow nozzle is lower than that of a jet flow pump nozzle additionally provided with a pulsating vacuum jet flow pump nozzle powder automatic rotating material distribution device. Therefore, the above-mentioned techniques have significant drawbacks.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the automatic rotary powder distribution device for the nozzle of the pulsating vacuum jet pump, which has the advantages of scientific design, high efficiency, energy conservation, stability, reliability and easy application, wherein the powder which needs to be added does not block or raise dust, does not cause local overhigh concentration of slurry in the nozzle of the jet pump, does not need to add extra energy power, and is safe and reliable.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a pulsation vacuum jet pump nozzle powder autogiration distributing device which characterized in that: the structure comprises a fixed plate, a left bearing support frame, a right bearing support tube, a rotary hollow shaft, a rotary wheel, a jet pump nozzle, a jet spray tube, a rotary joint and an external connection tube, wherein the left bearing support frame and the right bearing support tube are fixedly arranged at the upper end of the fixed plate at intervals; a jet flow spray pipe is coaxially sleeved and fixed in the rotating hollow shaft, the left end of the jet flow spray pipe extends out of the rotating hollow shaft and is coaxially connected with a rotating joint, and the left end of the rotating joint is coaxially connected with an external connecting pipe; the right end of the jet flow spray pipe is inserted into a pressurizing chamber connected with a jet pump nozzle, and the port of the right end of the jet flow spray pipe is of an asymmetric structure.
And a sealing gland and a shaft seal are arranged on the periphery of the jet flow nozzle between the jet pump nozzle and the rotary hollow shaft.
And the rotary joint is fixedly arranged on the support pipe frame, and the lower end of the support pipe frame is fixedly arranged on the fixing plate.
Moreover, a fixing ring is sleeved on the periphery of the rotating hollow shaft at the mounting side of the rotating wheel to fix the axial position of the rotating wheel, and the fixing ring is fixed on the rotating hollow shaft through a straight-groove fastening screw; the jet pump nozzle is fixedly arranged on the right bearing supporting tube through a bolt, a washer and a nut component.
And a plurality of base plates are arranged at the lower end of the fixed plate at intervals, and are respectively and correspondingly arranged at the lower ends of the fixed plates corresponding to the rotary joint, the left bearing support frame and the right bearing support tube.
And a transparent cover is fixedly arranged at the outer end of the tapered roller bearing of the left bearing support frame.
Moreover, the working method comprises the following steps: the high-pressure mixed liquid flow with the concentration of 3 to 6 atmospheric pressure is pressed into the external connection pipe through the high-pressure liquid delivery pump and then enters the incident flow spraying pipe, the potential energy of the liquid is reduced, the kinetic energy is increased, and a jet flow effect is formed; the liquid flowing at high speed is sprayed into a diffusion shape through the vacuum mixing chamber B, the occupied space volume is increased, part of air is entrained to enter the expansion chamber C, the space volume of the liquid is further increased, and then the liquid enters a conveying pipeline with the same diameter as the outlet end of the expansion chamber C; the liquid flowing at high speed generates vacuum in the process from the pressurizing chamber A to the expansion chamber C, powder solid which slides freely is sucked into the mixing chamber and mixed with the high-speed liquid which enters continuously, then the mixture enters the expansion chamber C, the mixture returns to the slurry tank through the conveying pipeline and is sucked by the high-pressure liquid conveying pump again, and then the mixture is pumped into the jet nozzle to form a circulation;
when powder does not descend smoothly or lump materials are not smooth, the rotating wheel is continuously rotated to drive the rotating hollow shaft to rotate, so that the jet flow spray pipe is driven to rotate, the outline of the outlet at the right end of the jet flow spray pipe is of an asymmetric structure, a periodic pulsating motion track is caused, and the lump materials begin to become loose under the periodic stirring action; the jet vacuum can generate periodic strength change; the flow resistance generated during the high pressure jet process causes the jet pump system to vibrate itself.
The invention has the advantages and positive effects that:
1. the jet nozzle of the device has the characteristics of rotatability and asymmetric structure, so that the device can generate periodically-changed pulsating vacuum, and the pulsating vacuum can cause the solid powder to generate an unstable pulsating state of looseness and accelerated gliding in the process of entering the jet nozzle, so that the powder can be uniformly distributed before entering a jet area, the powder is not accumulated into blocks, the flowability is good, the 'lump material' is avoided, and the idle running of a jet pump system is prevented.
2. The device can realize that the powder can freely slide down by depending on self gravity and jet vacuum generated by the jet nozzle of the jet pump, and reduce the possibility of idle running of a jet pump system.
3. The device has strong technological adaptability and is easy to operate. When the condition of 'lump materials' occurs, the rotating wheel can be driven by hands or an explosion-proof motor with belt transmission to rotate to assist the material distribution.
4. The device has low manufacturing cost, good effect and easy application.
5. The design of the device considers explosion-proof factors and also considers the possibility that misoperation and passion operation can generate open fire.
6. If the rotating wheel of the automatic powder rotating and distributing device of the nozzle of the pulsating vacuum jet pump is modified into a V-belt pulley and is connected with an explosion-proof motor, the continuous automatic production can be realized.
7. The invention discloses a solid-liquid mixed jet pump. It has dual functions of solid-liquid mixing and conveying. The most remarkable characteristic of the method is the conveying of solid powder, such as corn starch and the like. High efficiency is obtained if a jet pump is used to deliver soluble salts with relatively stable physical and chemical properties, such as sodium sulfate, sodium carbonate, sodium chloride, etc. The high-efficiency jet pump system has wide application prospect, and can be widely applied to solid-liquid mixed conveying in the fields of petroleum, chemical industry, medicine, food and the like.
Detailed Description
FIG. 1 is a schematic diagram of an economical jet nozzle without an automatic powder distribution device of a pulsating vacuum jet pump nozzle in the prior art;
FIG. 2 is a schematic diagram of the apparatus of the present invention;
fig. 3 is a bottom plan view of fig. 2, cut in the middle.
Reference numerals: 1, externally connecting a pipe; 2 supporting the pipe frame; 3, a jet flow spray pipe; 4, rotating the hollow shaft; 5, penetrating a cover; 6, a left bearing support frame; 7 a tapered roller bearing; 8, fixing a ring; 9 rotating wheels; 10 flat bond; 11 a right bearing support tube; 12, sealing a gland; 13 shaft seals (graphite seal packing); 14 jet pump nozzles; 15 fixing the plate; 16 base plates; 17 a swivel joint.
A, pressurizing chamber; b vacuum mixing chamber (such as starch and water); c expanding the chamber.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
Referring to the assembly principle and the working principle of the automatic powder rotating and distributing device for the nozzle of the pulsating vacuum jet pump shown in fig. 3, for the convenience of clear description, the embodiment is illustrated by a square shape shown in fig. 3.
The structure comprises a fixing plate 15, a left bearing support frame 6, a right bearing support tube 11, a rotary hollow shaft 4, a rotary wheel 9, a jet pump nozzle 14, a jet spray pipe 3, a rotary joint 17 and an external connection tube 1, wherein the left bearing support frame 6 and the right bearing support tube 11 are fixedly arranged at the upper end of the fixing plate 15 at intervals, tapered roller bearings 7 are respectively arranged at the upper parts of the left bearing support frame and the right bearing support tube, the rotary hollow shaft 4 is coaxially sleeved and supported in the two tapered roller bearings, the rotary hollow shaft 9 is limited and arranged in the middle of the rotary hollow shaft through a flat key 10, a fixing ring 8 is sleeved on the periphery of the rotary hollow shaft at the mounting side of the rotary wheel to fix the axial position of the rotary wheel, and the fixing ring is fixed on the rotary hollow;
the right end of the rotating hollow shaft is coaxially connected with an inlet of a pressurizing chamber A of a jet pump nozzle 14, and the jet pump nozzle is fixedly arranged on a right bearing supporting pipe through a bolt, a washer and a nut component; (details of jet pump nozzle construction see description of the prior art)
A jet flow spray pipe 3 is coaxially sleeved and fixed in the rotating hollow shaft, the left end of the jet flow spray pipe extends out of the rotating hollow shaft and is coaxially connected with a rotating joint 17, and the left end of the rotating joint is coaxially connected with an external connecting pipe 1; the right end of the jet flow spray pipe is inserted into an inlet of a pressurizing chamber A connected with a jet pump nozzle 14, and the right end port of the jet flow spray pipe is of an inclined cross section to form an asymmetric structure;
the swivel 17 is an assembly, commercially available from aerospace machines, Inc., Tenn, and therefore, is not described in detail herein.
In order to ensure the sealing property, a sealing gland 12 and a shaft seal 13 are arranged on the periphery of the jet flow nozzle between the jet pump nozzle and the rotary hollow shaft, and graphite sealing filler is adopted as the shaft seal in the embodiment;
in order to ensure the stability of the support, the rotary joint is fixedly arranged on the support pipe frame 2, and the lower end of the support pipe frame is fixedly arranged on the fixing plate.
A plurality of base plates 16 are arranged at the lower end of the fixing plate 15 at intervals to guarantee the supporting stability, and the base plates are correspondingly arranged at the lower ends of the fixing plates corresponding to the rotary joint, the left bearing supporting frame and the right bearing supporting tube respectively.
A transparent cover 5 is fixedly arranged at the outer end of the tapered roller bearing of the left bearing support frame for protection.
The working method comprises the following steps:
the high-pressure mixed liquid flow with lower concentration is pressed into the external connecting pipe 1 by a high-pressure liquid delivery pump (3-6 atmospheric pressure) and then enters the incident flow spray pipe 3, the potential energy of the liquid is reduced, the kinetic energy is increased, and a jet effect is formed.
The liquid flowing at high speed is sprayed into a diffusion shape through the vacuum mixing chamber B, the occupied space volume is increased, part of air is entrained to enter the expansion chamber C, the space volume of the liquid is further increased, and then the liquid enters the conveying pipeline with the same diameter as the outlet end of the expansion chamber C.
The liquid flowing at high speed generates vacuum in the process of passing through the pressurizing chamber A to the expansion chamber C, powdery solid which slides freely is sucked into the mixing chamber and mixed with the high-speed liquid which enters continuously, then the mixed liquid enters the expansion chamber C, and the mixed liquid returns to the slurry tank through the conveying pipeline and is sucked by the high-pressure liquid conveying pump again and then is pumped into the jet nozzle to form a circulation.
When the powder material descends not smoothly or sticks together, the wheel 9 can be rotated continuously, the rotating hollow shaft 4 is driven to rotate by the flat key 10, and the jet flow spray pipe 3 is pushed and rotated by the two straight-groove set screws.
The rotational function of the jet nozzle will result in three changes: the contour of the right end outlet of the jet flow spray pipe has an asymmetric characteristic, so that a periodic pulsating motion track is caused, and lump materials begin to become loose under the action of periodic stirring; the jet vacuum can generate periodic strength change; the flow resistance generated during the high pressure jet process causes the jet pump system to vibrate itself. Obviously, the change of the three aspects can cause the solid powder to generate unstable pulsating state of looseness and accelerated gliding in the process of entering the jet flow area, so that the powder can achieve uniform distribution before entering the jet flow area, is not accumulated into blocks, has good fluidity, avoids the phenomenon of lump material, prevents the idle running of a jet pump system, and also prevents the efficiency bottleneck of a jet flow nozzle. Therefore, the application of the device will significantly improve the operating efficiency of the jet pump system.
The installation method comprises the following steps:
(1) and (3) mounting of a fixing component: the sealing gland 12 penetrates through the jet flow spray pipe 3, the jet flow spray pipe 3 is installed on the jet flow pump nozzle 14, the shaft seal 13 is additionally installed between the jet flow spray pipe 3 and the jet flow pump nozzle 14, and then the sealing gland 12 and the shaft seal are fixed on the jet flow pump nozzle 14 through countersunk head screws. The right bearing support frame 11 is fixed on the jet pump nozzle by bolts, gaskets and nuts.
(2) Installation of the rotation assistance assembly: the right tapered roller bearing 7 is installed on the rotary hollow shaft 4, then a flat key 10, a rotating wheel 9 and a fixing ring 8 are sequentially installed, the fixing ring and the rotating wheel are fixed on the rotary hollow shaft 4 through a straight-line groove set screw, and then the left tapered roller bearing is installed on the rotary hollow shaft. Then, the rotating assembly installed by the method is sleeved on the jet flow nozzle 3, a right tapered roller bearing in the rotating assembly is installed in a right bearing support frame 11, a left bearing support frame 6 is installed on the tapered roller bearing, and the transparent cover 5 is fixed on the left bearing support frame by using bolts and gaskets and is propped against the tapered roller bearing 11. The rotating hollow shaft 4 is fixed on the jet nozzle 3 by two straight-line groove set screws. The jet flow spray pipe is screwed on the rotary joint 17, the rotary joint 17 is fixedly arranged on the support pipe frame 2 by using bolts and gaskets, and then the external connecting pipe 1 is screwed on the rotary joint.
(3) And (3) mounting a fixed component: the plurality of footing plates 16 are welded to the fixing plate 15, respectively. And then the supporting pipe frame 2, the left bearing supporting frame 6 and the right bearing supporting frame 11 are fixed on the fixing plate 15 by bolts and gaskets. And finishing the installation.
Disassembling sequence:
the bolt and the gasket are disassembled, the fixing plate is disassembled, the bolt and the gasket on the supporting pipe frame are disassembled, then the supporting pipe frame, the external connecting pipe and the rotary joint are sequentially disassembled, and the two straight-groove fastening screws for fixing the rotary hollow shaft are disassembled.
And (5) detaching the bolt and the gasket, and sequentially detaching the transparent cover, the left bearing support frame and the tapered roller bearing. The straight-line groove fastening screw at the position of the fixing ring is disassembled, and then the flat key, the rotating wheel and the fixing ring are sequentially disassembled; the rotating hollow shaft is disassembled; the bolt, the gasket and the nut are disassembled, and the right bearing support frame and the right tapered roller bearing are sequentially disassembled; and sequentially detaching the countersunk head screw, the sealing gland, the shaft seal and the jet flow spray pipe. And finishing the disassembly.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention, and therefore, the scope of the invention is not limited to the disclosure of the embodiments and the drawings.
Claims (6)
1. The utility model provides a pulsation vacuum jet pump nozzle powder autogiration distributing device which characterized in that: the structure comprises a fixed plate, a left bearing support frame, a right bearing support tube, a rotary hollow shaft, a rotary wheel, a jet pump nozzle, a jet spray tube, a rotary joint and an external connection tube, wherein the left bearing support frame and the right bearing support tube are fixedly arranged at the upper end of the fixed plate at intervals;
a jet flow spray pipe is coaxially sleeved and fixed in the rotating hollow shaft, the left end of the jet flow spray pipe extends out of the rotating hollow shaft and is coaxially connected with a rotating joint, and the left end of the rotating joint is coaxially connected with an external connecting pipe; the right end of the jet flow spray pipe is inserted into a pressurizing chamber connected with a jet pump nozzle, and the port of the right end of the jet flow spray pipe is of an asymmetric structure;
the working method comprises the following steps: the high-pressure mixed liquid flow with lower concentration is pressed into an external connecting pipe under the pressure of 3 to 6 atmospheres through a high-pressure liquid delivery pump, then the high-pressure mixed liquid flow enters an incident flow spraying pipe, the potential energy of the liquid is reduced, the kinetic energy is increased, and a jet flow effect is formed; the liquid flowing at high speed is sprayed into a diffusion shape through the vacuum mixing chamber B, the occupied space volume is increased, part of air is entrained to enter the expansion chamber C, the space volume of the liquid is further increased, and then the liquid enters a conveying pipeline with the same diameter as the outlet end of the expansion chamber C; the liquid flowing at high speed generates vacuum in the process from the pressurizing chamber A to the expansion chamber C, powder solid which slides freely is sucked into the mixing chamber and mixed with the high-speed liquid which enters continuously, then the mixture enters the expansion chamber C, the mixture returns to the slurry tank through the conveying pipeline and is sucked by the high-pressure liquid conveying pump again, and then the mixture is pumped into the jet nozzle to form a circulation;
when powder does not descend smoothly or lump materials are not smooth, the rotating wheel is continuously rotated to drive the rotating hollow shaft to rotate, so that the jet flow spray pipe is driven to rotate, the outline of the outlet at the right end of the jet flow spray pipe is of an asymmetric structure, a periodic pulsating motion track is caused, and the lump materials begin to become loose under the periodic stirring action; the jet vacuum can generate periodic strength change; the flow resistance generated during the high pressure jet process causes the jet pump system to vibrate itself.
2. The automatic rotary powder distributing device for the nozzle of the pulsating vacuum jet pump as claimed in claim 1, wherein: and a sealing gland and a shaft seal are arranged on the periphery of the jet flow nozzle between the jet pump nozzle and the rotary hollow shaft.
3. The automatic rotary powder distributing device for the nozzle of the pulsating vacuum jet pump as claimed in claim 1, wherein: the rotary joint is fixedly arranged on the support pipe frame, and the lower end of the support pipe frame is fixedly arranged on the fixing plate.
4. The automatic rotary powder distributing device for the nozzle of the pulsating vacuum jet pump as claimed in claim 1, wherein: a fixing ring is sleeved on the periphery of the rotating hollow shaft at the mounting side of the rotating wheel to fix the axial position of the rotating wheel, and the fixing ring is fixed on the rotating hollow shaft through a straight-groove fastening screw; the jet pump nozzle is fixedly arranged on the right bearing supporting tube through a bolt, a washer and a nut component.
5. The automatic rotary powder distributing device for the nozzle of the pulsating vacuum jet pump as claimed in claim 1, wherein: a plurality of base plates are arranged at the lower end of the fixed plate at intervals, and the base plates are correspondingly arranged at the lower ends of the fixed plate corresponding to the rotary joint, the left bearing support frame and the right bearing support tube respectively.
6. The automatic rotary powder distributing device for the nozzle of the pulsating vacuum jet pump as claimed in claim 1, wherein: a transparent cover is fixedly arranged at the outer end of the tapered roller bearing of the left bearing support frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811100005.6A CN109382009B (en) | 2018-09-20 | 2018-09-20 | Automatic rotary powder distributing device for nozzle of pulsating vacuum jet pump |
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| CN201811100005.6A CN109382009B (en) | 2018-09-20 | 2018-09-20 | Automatic rotary powder distributing device for nozzle of pulsating vacuum jet pump |
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| CN109382009B true CN109382009B (en) | 2021-04-23 |
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| CN109999688B (en) * | 2019-03-07 | 2021-06-01 | 天津科技大学 | Material distribution device along with vibration type jet pump nozzle feed inlet |
| CN109999679A (en) * | 2019-05-05 | 2019-07-12 | 安徽理工大学 | A kind of mealy medicine is evenly dispersed in the liquid phase and mixed dissolution system |
| CN111486137B (en) * | 2020-03-16 | 2022-02-25 | 天津科技大学 | Jet pump nozzle with open structure and vibration reduction function |
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| AU2003903192A0 (en) * | 2003-06-19 | 2003-07-10 | Commonwealth Scientific And Industrial Research Organisation | Jet device for mixing fluid |
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| US3451327A (en) * | 1965-09-20 | 1969-06-24 | Laval Separator Co De | Steam injector for a milk sterilizer |
| CN201020350Y (en) * | 2007-04-12 | 2008-02-13 | 大庆摩恩达工程有限公司 | Adjustable ejector |
| CN201200870Y (en) * | 2008-04-24 | 2009-03-04 | 中国海洋石油总公司 | Pigment mixing head with adjustable spray nozzle |
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| Publication number | Publication date |
|---|---|
| CN109382009A (en) | 2019-02-26 |
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