A dual fluid nozzle

Abstract

The technical solution used in the present invention is: a dual-fluid nozzle, comprising: a shell, an air guide pipe, a resonance head, characterized in that it also includes: an atomizer core; the front outer wall of the air guide pipe is provided with an air guide pipe thread, and the air guide pipe thread has cut planes on both sides symmetrically as the inlet horizontal plane, and a swirl core is provided inside the front end of the air guide pipe; the rear end face of the atomizer core is provided with a plurality of inclined grooves with a rotation direction opposite to that of the swirl core, and the atomizer core is installed at the front end inside the shell; the air guide pipe is threadedly connected to the inner wall of the shell through the air guide pipe thread, and the front end face is against the rear end face of the atomizer core; the resonance head is fixedly installed in front of the shell outlet. The present invention arranges a swirl core and an inclined groove with opposite rotation directions, so that water and gas are mixed inside the atomizer core with opposite rotation directions, and the mixing effect is more sufficient and uniform, and the atomization effect is significantly improved.

Description

Technical Field

[0001] The invention relates to the field of spray nozzles, and in particular to a dual-fluid spray nozzle. Background Art

[0002] At present, water mist is widely used in open dust control. When the water mist particles are smaller than or equal to the dust particles, the probability of collision, condensation and sedimentation is the highest. For dust particles of PM2.5 and below, it is necessary to use a water mist with a particle size of 1-10um to achieve effective dust suppression. Conventional nozzles cannot produce water mist with a particle size of 1-10um through direct mixing and atomization of water and air, and thus cannot effectively settle dust of PM2.5 and below.

[0003] The existing Chinese utility model patent with patent number 200720101066.5: atomizing nozzle, the utility model provides an atomizing nozzle, which includes a water inlet pipe and an air inlet pipe, the water inlet pipe and the air inlet pipe are respectively connected to the water supply cavity of the nozzle connector and the air supply pipe installed at the center of the water supply cavity of the connector, a radial water inlet hole is arranged at the front of the air supply pipe, a hollow conical nozzle is installed at the front end of the connector, and an oscillating head with an arc groove is fixedly arranged in front of the nozzle corresponding to the injection hole through a wire frame. The technical scheme of the utility model also includes: a nozzle protection tube is sleeved on the connector, a nozzle rear protective shell is installed at the rear end of the protection tube, and a water inlet pipe and an air inlet pipe protective sleeve are connected to the rear end of the protective shell; a heating belt is arranged in parallel with the water inlet pipe and the air inlet pipe. The utility model uses a water and air mixed jet to act on the oscillating head to form an oscillation wave at the nozzle injection port end, so that the sprayed water mist is refined to achieve the purpose of ideal dust reduction.

[0004] Although the above patent forms a certain atomization effect, the water-gas combination is not sufficient, and the atomization effect is not obvious. Therefore, there is an urgent need to develop a nozzle with sufficient water-gas combination and good atomization effect. Summary of the invention

[0005] In view of the above problems, the present invention provides a dual-fluid nozzle. By setting a swirl core and an inclined groove with opposite rotation directions, water and gas are mixed inside the atomization core with opposite rotation directions, the mixing effect is more sufficient and uniform, and the atomization effect is significantly improved.

[0006] The technical solution used in the present invention is: a dual-fluid nozzle, comprising: a shell, an air guide pipe, and a resonance head, characterized in that it also comprises: an atomization core; the front outer wall of the air guide pipe is provided with an air guide pipe thread, and the air guide pipe threads are symmetrically provided with chamfered planes on both sides, and a cavity is provided between the chamfered plane and the inner wall of the shell, and the cavity is a water inlet; a swirl core is provided inside the front end of the air guide pipe; a plurality of inclined grooves with a rotation direction opposite to that of the swirl core are provided on the rear end face of the atomization core, and the atomization core is installed at the front end inside the shell; the air guide pipe is threadedly connected to the inner wall of the shell through the air guide pipe thread, and the front end face is against the rear end face of the atomization core; the resonance head is fixedly installed in front of the shell outlet.

[0007] Furthermore, a plurality of layers of arc-shaped stepped conical surfaces are provided at the rear end of the resonant head.

[0008] Furthermore, the resonant head is fixedly mounted on the shell through a supporting steel wire, and a steel wire hole and a slot are provided on the outer wall of the shell; the supporting steel wire hook is installed in the steel wire hole, and its steel wire is clamped in the slot, and an arc groove is provided inside the resonant head to fit the tip of the supporting steel wire.

[0009] Furthermore, the atomization core is a Laval nozzle structure.

[0010] Furthermore, the inclination angle of the inclined groove is 15-20 degrees.

[0011] Furthermore, the shell and the outer wall of the air duct are both provided with sealing rings.

[0012] Since the present invention adopts the above technical solution, the present invention has the following advantages:

[0013] 1. The present invention arranges a swirl core and an inclined groove with opposite rotation directions, so that the air flow and the water flow are mixed and atomized in the atomization core in a counter-rotating manner, so that the water vapor produces a stronger interaction, the mixing effect is more sufficient and uniform, and the atomization effect is significantly improved.

[0014] 2. The atomization core adopts the Laval nozzle structure commonly used in aircraft engines, which fully accelerates the mixed water mist to a supersonic state and sprays backward, providing sufficient kinetic energy for secondary resonance atomization.

[0015] 3. The resonant head adopts several arc-shaped step structures. After the water mist hits the arc-shaped step structure, it interacts with each other under the action of each arc step to form resonance and produce a sonic boom effect, which breaks the water droplets into 1-10um ultra-fine mist particles to the maximum extent, further improving the dust suppression effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereogram of the present invention.

[0017] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the shell structure.

[0019] Figure 4 This is a schematic diagram of the rear view of the atomizer core.

[0020] Figure 5 A schematic diagram of the cross-section of the atomizer core

[0021] Figure 6 Schematic diagram of the airway structure.

[0022] Figure 7 This is a schematic diagram of the resonant head structure.

[0023] Figure 8 Schematic diagram of the swirl core structure.

[0024] Fig. 9 Schematic diagram of the supporting wire structure.

[0025] Fig.10 This is a schematic diagram of the atomizer core structure.

[0026] Figure numbers: 1-shell; 2-air guide pipe, 3-swirl core, 4-air guide pipe thread, 5-cut plane, 6-atomizing core, 7-slant groove, 8-resonance head, 9-supporting steel wire, 10-steel wire hole, 11-sealing ring. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0028] Example

[0029] like Figure 1-Figure 10 As shown, a dual-fluid nozzle comprises: a shell 1, an air guide pipe 2, a resonance head 8, and also comprises: an atomizing core 6; an air guide pipe thread 4 is provided on the front outer wall of the air guide pipe 2, and the air guide pipe thread 4 is symmetrically provided with chamfered planes 5 on both sides, and a cavity is provided between the chamfered plane 5 and the inner wall of the shell 1, and the cavity is a water inlet, and a swirl core 3 is provided inside the front end of the air guide pipe 2; 30 inclined grooves 7 with a rotation direction opposite to that of the swirl core 3 are provided on the rear end face of the atomizing core 6, and the inclination angle of the inclined groove 7 is 15 degrees; the atomizing core 6 is a Laval nozzle structure, which is installed at the front end of the shell 1; the air guide pipe 2 is threadedly connected to the inner wall of the shell 1 through the air guide pipe thread 4, and the front end face is against the rear end face of the atomizing core 6; a multi-layer arc-shaped step step is provided at the rear end of the resonance head 8, and is fixedly installed in front of the outlet of the shell 1.

[0030] When in use, first pass the supporting steel wire 9 through the arc groove inside the resonance head 8, punch the resonance head 8 so that the tip of the supporting steel wire 9 fits tightly with the arc groove, then install the hook of the supporting steel wire 9 in the steel wire hole 10, and the steel wire is clamped in the clamping groove to complete the fixation of the resonance head 8; install the atomizer core 6 at the front end inside the shell 1, and the front end face abuts against the inner wall of the shell 1, then screw the air guide tube 2 into the shell 1, and the air guide tube thread 4 is threadedly connected with the inner wall of the shell 1, until the front end face abuts against the rear end face of the atomizer core 6, the nozzle assembly is completed; insert the nozzle into the nozzle seat, and the outer walls of the shell 1 and the air guide tube 2 are provided with sealing rings 11 to ensure good sealing with the nozzle seat. Open the valves of the water and air circuits, and the air passes through the cyclone core 3 and enters the atomizing core 6 in a clockwise direction. The water passes through the inclined groove 7 and enters the atomizing core 6 in a counterclockwise direction. The water and air collide at high speeds in different directions in the atomizing core 6 to fully mix the water mist. The atomizing core 6 is a Laval nozzle structure, so that the mixed water mist is further accelerated to a supersonic state and sprayed backwards. The water mist hits the resonance head 8. The arc-shaped step structure makes the water mist interact with each other to form resonance and produce a sonic boom effect after the water mist hits, so that the water droplets are broken into 1-10um ultra-fine mist particles to the maximum extent, thereby achieving a better dust reduction effect.

Claims

1. A two-fluid nozzle, comprising: The shell (1), air guide tube (2), and resonance head (8) are characterized in that they also include: an atomizer core (6); an air guide tube thread (4) is provided on the front outer wall of the air guide tube (2), and chamfered planes (5) are symmetrically provided on both sides of the air guide tube thread (4), and a cavity is provided between the chamfered plane (5) and the inner wall of the shell (1), and the cavity is a water inlet; a swirl core (3) is provided inside the front end of the air guide tube (2); a plurality of inclined grooves (7) with a rotation direction opposite to that of the swirl core (3) are provided on the rear end face of the atomizer core (6), and the atomizer core (6) is installed at the front end inside the shell (1); the air guide tube (2) is threadedly connected to the inner wall of the shell (1) through the air guide tube thread (4), and the front end face is against the rear end face of the atomizer core (6); the resonance head (8) is fixedly installed in front of the outlet of the shell (1); The rear end of the resonant head (8) is provided with multiple layers of arc-shaped steps; The atomizing core (6) is a Laval nozzle structure.

2. A two-fluid nozzle according to claim 1, characterized in that: The resonant head (8) is fixedly mounted on the housing (1) via a supporting steel wire (9).

3. A two-fluid nozzle according to claim 1, characterized in that: The inclined angle of the inclined groove (7) is 15-20 degrees.

4. A two-fluid nozzle according to claim 1, characterized in that: The outer walls of the housing (1) and the air guide tube (2) are both provided with sealing rings (11).

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