CN103047199A - Air jet pump - Google Patents

Abstract

The invention discloses an air jet pump which comprises a pump body and an injection system. A material inlet, a venturi inlet section, a venturi and a diffusion pipe are arranged in the pump body. The injection system comprises an air inlet, a pump chamber, a nozzle and a spout. The spout is arranged at the cross connection position of the nozzle and the venturi inlet section. The injection system of the air jet pump adopts invisible design. An independent injection pipe and the nozzle are arranged in the pump body, so that working space of the pump is greatly improved. The air jet pump is capable of extracting and delivering materials with diameter smaller than pump pipe diameter and not apt to impurity winding and blocking. The air jet pump is small in energy loss when two strands of fluids are mixed, and the pump is high in working efficiency.

Description

air jet pump

technical field

The invention relates to the technical field of air pumps, in particular to an air jet pump.

Background technique

As shown in FIG. 2 , which is a schematic structural diagram of an existing air jet pump, a throat pipe 7 and a diffuser pipe 8 are arranged in the pump body, and an independent injection pipe and nozzle 9 are arranged at the center of the pump body.

The jet tube and nozzle are located at the center of the pump body, which reduces the space of the flow channel in the pump body, and can only discharge the small solid pollutants, and reduces the working efficiency of the jet pump; the sundries are easy to entangle when the pump is discharging sewage On the injection pipe in the pump body, blockage occurs, which affects the normal operation of the pump.

Contents of the invention

Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an air jet pump, which improves the working efficiency of the jet pump, improves the ability to discharge fixed pollutants, and is less prone to clogging in the pump.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: an air jet pump, including a pump body and an injection system. The pump body is provided with a material inlet, a throat inlet section, a throat and a diffusion pipe. The injection system described above is located outside the pump body, and the injection system includes an air inlet, a pump chamber, a nozzle, and a nozzle, and the nozzle is located at the junction of the nozzle and the inlet section of the throat.

The air inlets are two symmetrically arranged.

The caliber of the feed end of the inlet section of the throat is larger than the caliber of the discharge end of the inlet section of the throat.

The space of the pump chamber at the outlet end is smaller than the space of the pump chamber at the air inlet end.

The material inlet, the throat, the inlet section of the throat and the diffuser are coaxial.

Compared with the prior art, the present invention has the following advantages: the injection system of the air jet pump adopts an invisible design, and there is no independent injection pipe and nozzle in the pump body, which greatly improves the working space of the pump and can pump water smaller than the diameter of the pump pipe. The material is not easy to be entangled and blocked by debris; the energy loss is small when the two fluids in the jet pump are mixed, and the pump has high working efficiency.

Description of drawings

The following is a brief description of the content expressed in the drawings of this manual and the marks in the drawings:

Fig. 1 is a schematic diagram of the structure of the air jet pump of the present invention.

Fig. 2 is a schematic diagram of the structure of an existing air jet pump.

In the figure: 1. Material inlet, 2. Pump chamber, 3. Air inlet, 4. Nozzle, 5. Nozzle, 6. Throat inlet section, 7. Throat, 8. Diffusion pipe, 9. Nozzle.

Detailed ways

The specific implementation manner of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings.

As shown in Figure 1, an air jet pump includes a pump body and an injection system. The pump body is sequentially provided with a material inlet 1, a throat inlet section 6, a throat pipe 7 and a diffusion pipe 8. The injection system is arranged outside the pump body. The injection system comprises an air inlet 3, a pump chamber 2, a nozzle 4 and a nozzle 5, and the nozzle 5 is located at the junction of the nozzle 4 and the inlet section 6 of the throat. Among them, two air inlets are symmetrically arranged to improve the performance and working efficiency of the pump.

The caliber of the feed end of the throat inlet section 6 is larger than the caliber of the discharge end of the throat inlet section, where the two fluids are mixed to reduce energy loss.

The space of the pump chamber 2 at the nozzle end is smaller than the space of the pump chamber at the air inlet end, so that the injection speed is increased and the performance of the pump is improved.

The material inlet 1, the throat pipe 7, the throat pipe inlet section 6 and the diffuser pipe 8 are coaxial, and the resistance is small, which improves the working efficiency of the pump.

The working principle of the air jet pump: the working fluid air enters the pump chamber through the air inlet, and is ejected at high speed from the nozzle. At the same time, the static pressure energy is partially converted into kinetic energy, which makes the pump body form a vacuum and sucks the sewage liquid into the pump. The working fluid and the sucked sewage liquid are mixed in the throat, and energy exchange occurs. The speed of the air is continuously reduced, and the speed and pressure of the sucked sewage liquid are continuously increased. At the exit of the throat, the speed of the air and liquid tends to be unanimous. When the mixture passes through the diffuser pipe, the speed gradually decreases with the increase of the flow channel, and the kinetic energy is converted into pressure energy, so that the pressure of the sucked sewage liquid also increases and is discharged to the designated point. The sewage liquid in the material chamber enters the pump body from the material inlet. Since the liquid in the pump body is continuously taken away, a negative pressure is formed in the pump body, and the liquid can be continuously sucked into the pump to work continuously.

The air jet pump of the present invention applies aerodynamics and fluid mechanics, and there is no theory that can directly guide the structural design of the pump. Therefore, a non-linear numerical visualization analysis method independently proposed is adopted, and an applicable model is established to guide the design of the pump body. The geometric structure was designed, and several samples were finally successfully produced, and the actual effect test was carried out.

The research and development process of the air jet pump: test-theoretical analysis-data simulation-data optimization-retest-re-simulation-three tests-determining the final structure-three-dimensional digital model drawing-processing.

The production process of the air jet pump includes the following steps: blanking-rough machining-welding-finish machining-drilling, tapping-deburring-inspection-cleaning-testing-debugging-retesting-packing-storage.

The air jet pump can absorb the solid pollutants allowed by the diameter of the pump pipe. The pump can reduce the water content of the sludge to about 50% in water treatment, and can also pump the sewage filter residue with a solid content of 56%, even Slurry and sludge with a fixed content of 80%, among which, the head can reach 10 meters, and the maximum passing diameter can reach 20 centimeters.

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods, as long as various insubstantial improvements are adopted in the method concept and technical solutions of the present invention, or there is no improvement Directly applying the conception and technical solutions of the present invention to other occasions falls within the protection scope of the present invention.

Claims (5)

1. air-spray pump, comprise the pump housing and ejecting system, be provided with material inlet (1), trunnion inducer (6) and trunnion (7) and diffusing tube (8) in the described pump housing, it is characterized in that: described ejecting system is located at outside the pump housing, ejecting system comprises suction port (3), pump chamber (2), nozzle (4), spout (5), and described spout (5) is located at the jointing place of nozzle (4) and trunnion inducer (6).

2. air-spray pump as claimed in claim 1, it is characterized in that: described suction port (3) is symmetrically arranged two.

3. air-spray pump as claimed in claim 1, it is characterized in that: the bore of the feed end of described trunnion inducer (6) is greater than the bore of the discharge end of trunnion inducer (6).

4. such as each described air-spray pump of claims 1 to 3, it is characterized in that: described pump chamber (2) in the space of spout end less than the space of pump chamber (2) at the suction port end.

5. air-spray pump as claimed in claim 4, it is characterized in that: described material inlet (1), trunnion (7) and trunnion inducer (6) and diffusing tube (8) are coaxial.

Images