CN215547935U - Square export wet nozzle device - Google Patents

Abstract

The utility model relates to a sand blasting machine nozzle key component field specifically discloses a square export wet nozzle device, and it includes the device body of compriseing inner tube and outer tube, inner tube and outer tube fixed connection, the device body structurally divide into input structure and output structure, output structure passes through screw fixed connection at the right-hand member of input structure, input structure and output structure comprise inner tube and outer tube fixed connection, be equipped with contraction section and throat section from a left side to the right side in the inner tube of input structure, the inner tube of output structure includes the expansion section and constitutes, venturi structure is constituteed to contraction section, throat section and expansion section, the expansion section comprises toper section and square section. This patent has solved the nozzle and has sprayed repeated uneven problem of not environmental protection that causes at work piece formation raise dust of overlapping and sand dust injection.

Description

Square export wet nozzle device

Technical Field

The utility model relates to the field of key parts of a nozzle of a sand blasting machine, in particular to a wet nozzle device with a square outlet.

Background

Sandblasting is a process of cleaning and roughening the surface of a substrate by the impact action of a high-velocity stream of sand. Compressed air is used as power to form a high-speed spray beam to spray materials (copper ore sand, quartz sand, carborundum, iron sand and Hainan sand) to the surface of a workpiece to be treated at a high speed, so that the outer surface or the shape of the workpiece is changed, and the surface of the workpiece obtains certain cleanliness and different roughness due to the impact and cutting action of an abrasive on the surface of the workpiece, so that the mechanical property of the surface of the workpiece is improved, the fatigue resistance of the workpiece is improved, the adhesive force between the workpiece and a coating is increased, the durability of a coating film is prolonged, and the leveling and decoration of a coating are facilitated.

Blast nozzles are key components on equipment for performing various surface treatments. The blast nozzle is required to have high wear resistance, the inner hole structure of the blast nozzle is an important factor influencing the wear resistance of the blast nozzle except for the material for manufacturing the blast nozzle, and at present, finished blast nozzles at home and abroad are generally of a through hole structure with equal inner diameter, and the service life of the blast nozzle is short.

The outlet of the existing sand blasting nozzle is circular, so that the outlet of the nozzle is subjected to large impact force, the nozzle is seriously eroded, sand sprayed by the nozzle with the structure is dotted on a workpiece, the sand blasting area is repeatedly covered greatly, the spraying is uneven, and the sand blasting efficiency is low. And a large amount of sand washes the inner pipeline of the grinding nozzle during sand blasting, so that high temperature in the pipe is caused, and a large amount of fly ash can appear on the workpiece by the sprayed sand, which is not beneficial to environmental protection.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a wet nozzle device with a square outlet, which solves the problem of environmental pollution caused by uneven repeated covering of nozzle spraying and flying of sand and dust on a workpiece.

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

the utility model provides a square export wet nozzle device, it includes the device body of constituteing by inner tube and outer tube, inner tube and outer tube fixed connection, the device body structurally divide into input structure and output structure, output structure passes through screw fixed connection at the right-hand member of input structure, input structure and output structure constitute by inner tube and outer tube fixed connection, be equipped with contraction section and throat section from a left side to the right side in the inner tube of input structure, output structure's inner tube includes the expansion section and forms, venturi structure is constituteed to contraction section, throat section and expansion section, the expansion section comprises toper section and square section. The beneficial effects of this technical scheme lie in: (1) the inner pipe of the device is designed into a Venturi tube structure, so that the flow velocity of an entering high-pressure gas-sand mixture in the pipe can be improved, and the jet velocity of an output port is accelerated; (2) the expansion section is arranged into a conical section and a square section, so that the gas-sand mixture can gradually change in the expansion section, the sand sprayed on the workpiece is changed into a square structure from a round structure, the spraying is uniform, the spraying is not repeated, and the efficiency is high.

The first preferred scheme is as follows: as a further optimization of the basic scheme, the section of the expansion section is gradually transited from a circle to a square, one side of an inlet of the expansion section is a semi-conical section, the tail end of the conical section is connected with a square section structure with a square section, the width of the section of the square section is larger than the inner diameter of the throat section, a long edge of one side of the conical section is connected with an outlet of the throat section, and a short edge of the other side of the conical section is connected with the square section. The beneficial effect of this preferred scheme lies in: with the contraction section of inner tube and throat section cooperation formation venturi structure, moreover, intraductal object has throat section entering toper section pipeline mouth grow suddenly, forms turbulent flow and little swirl in the toper section, has the interior object spun effect of acceleration pipe.

The preferred scheme II is as follows: as a further optimization of the first preferred embodiment, the length ratios of the throat section inner diameter, the square section inner diameter, the tapered section small end and the tapered section large end are as follows: 1:1.5:1.5:2. The beneficial effect of this preferred scheme lies in increasing the velocity of flow of fluid in the pipe.

The preferable scheme is three: as a further optimization of the basic scheme, a conical structure is arranged at the left end of the output structure, air inlet holes are formed in the side wall of the conical structure and are circumferentially and uniformly distributed along the conical surface of the output structure, an air passage is formed in the joint of the conical section and the throat section, and the outside of the air inlet hole is communicated with the air passage. The beneficial effect of this preferred scheme lies in: when fluid in the pipe flows from the throat section to the expansion section, negative pressure is formed around the pipe, air outside the pipe is sucked into the pipe by the negative pressure, and the flowing speed of the fluid can be improved.

The preferable scheme is four: as a further optimization of the basic scheme, the periphery of the joint of the input structure and the output structure is provided with an annular bump. The beneficial effect of this preferred scheme lies in: the arrangement of the convex block facilitates manual grabbing control and is convenient for fixedly connecting the input structure with the output structure.

The preferable scheme is five: as a further optimization of the fourth preferred scheme, a water inlet hole is formed in the bump, one end of the water inlet hole is opened outwards, the other end of the water inlet hole is of a conical structure, a water inlet is formed in the conical structure, the water inlet is connected with a water channel, the water channel is communicated with the throat section of the inner tube, and threads are arranged on the inner surface layer of the water inlet hole. The beneficial effect of this preferred scheme lies in: set up the water inlet and get into the inner tube, can make the interior cooling of inner tube, to gas-sand mixture humidification simultaneously, prevent that the sandblast from flying dust in the workpiece surface.

The preferable scheme is six: as a further optimization of the basic solution, the outer tube is made of an aluminum alloy material. The beneficial effect of this preferred scheme lies in: the aluminum alloy material quality is lighter than metal quality such as iron, and the aluminum alloy material is wear-resisting resistant falling simultaneously and can be protected the inner tube.

The preferable scheme is seven: as a further optimization of the basic solution, the inner tube is a tubular structure made of boron carbide. The preferred scheme has the beneficial effects of high hardness of boron carbide, wear resistance, erosion resistance, high temperature resistance and stable chemical property.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

fig. 2 is a right side view of an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: 1 input structure, 11 lugs, 12 water inlet holes, 13 water inlet holes, 14 water channels, 2 output structures, 21 air inlet holes, 22 air channels, 3 outer pipes, 4 inner pipes, 41 contraction sections, 42 throat sections, 43 expansion sections, 431 conical sections and 432 square sections.

Examples are shown in FIGS. 1-2: a wet nozzle device with a square outlet comprises a device body consisting of an inner tube and an outer tube, wherein the inner tube 4 is fixedly connected with the outer tube 3, the inner tube 4 is mainly made of boron carbide, the outer tube 3 is made of aluminum alloy materials, the device body is structurally divided into an input structure 1 and an output structure 2, the input structure 1 is fixedly connected with the output structure 2 through screws, the input structure 1 and the output structure 2 are both fixedly connected with the inner tube 4 and the outer tube 3, the inner tube 4 of the input structure 1 sequentially consists of a contraction section 41 and a throat section 42 from left to right, the inner tube 4 of the output structure 2 comprises an expansion section 43, the contraction section 41, the throat section 42 and the expansion section 43 jointly form a Venturi tube structure, the expansion section 43 consists of a conical section 431 and a square section 432, as shown in figure 1, the section of a left channel of the expansion section 43 gradually transits from a circle to a square from left to form a conical section 431, the end-to-end connection of toper section 431 has the square section structure of cross-section for the square, and the length of direction section 432 is greater than its cross-section width, and the width of square section 432 cross-section is greater than throat section 42 internal diameter, and toper section 431 main aspects are connected with throat section 42 exit, and toper section 431 tip is connected with square section 432, and the length proportion of throat section 42 internal diameter, square section 432 internal diameter, toper section 431 tip, toper section 431 main aspects is: 1:1.5:1.5:2, the left end of the output structure 2 is set to be a conical structure, the side wall of the conical structure is provided with air inlet holes 21, the air inlet holes 21 are uniformly distributed along the circumferential direction of the conical surface of the output structure 2, the connection part of the conical section 431 and the throat section 42 is provided with the air inlet holes 21 to communicate the outside with the air passage 22, the outer pipe 3 at the connection part of the input structure 1 and the output structure 2 is provided with an annular convex block 11, a water inlet hole 12 is arranged in the convex block 11, one end of the water inlet hole 12 is opened outwards, the other end of the water inlet hole is in a conical structure, a water inlet 13 is arranged in the conical structure, the water inlet 13 is connected with a water channel 14, the water channel 14 is communicated with the throat section 42 of the inner pipe 4, and the inner wall of the water inlet hole 12 is provided with an internal thread.

The specific implementation principle and process are as follows:

the input structure 1 and the output structure 2 of the device are fixedly connected, tap water is connected into the water inlet 12, high-pressure air and sand are connected into the contraction section 41, the air-sand mixture sequentially passes through the contraction section 41, the throat section 42 and the expansion section 43 and is sprayed out from the outlet of the expansion section 43, the fluid speed in the pipeline is increased from the throat section 42 to the expansion section 43, the inlet speed of the expansion section 43 is higher than that of the fluid in the inlet of the throat section 42, when the air-sand mixture flows through the inner pipe 4, water in the water inlet 12 enters the water channel through the water inlet 13 and enters the throat section 42 of the inner pipe through the water channel 14, the water flow is driven by the air-sand mixture in the throat section 42 to enter the expansion section 43 through the throat section 42, the fluid in the inner pipe 4 enters the expansion section 43-shaped section 431 through the outlet of the throat section 42, negative pressure is formed in the air passage 22, external internal cone gas enters the pipeline through the air inlet 21 to improve the water flow speed in the pipeline, and the gas that the inlet port 21 got into forms the turbulent flow in the toper section 431 under the water conservancy diversion of air flue 22, because the half cone structure of toper section 431, high-speed fluid forms little swirl at toper section 431, promote the intensive mixing of gas, water and sand, play the effect of even humidification to gas-sand mixture, the fluid gets into square section 432 through trapezoidal section 431, the fluid is spout by square section 432 export, beat and be square structure on the work piece, reduce the repeated cover of sandblast point, can humidify with this kind of mode sandblast, prevent flying sand raise dust, promoted sandblast efficiency.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (8)

1. A square outlet wet nozzle device, its characterized in that: it includes the device body of constituteing by inner tube and outer tube, inner tube and outer tube fixed connection, the device body structurally divide into input structure and output structure, output structure passes through screw fixed connection at the right-hand member of input structure, input structure and output structure constitute by inner tube and outer tube fixed connection, be equipped with contraction section and throat section from a left side to the right side in the inner tube of input structure, output structure's inner tube comprises the expansion section, venturi structure is constituteed to contraction section, throat section and expansion section, the expansion section comprises toper section and square section.

2. A square outlet wet nozzle device according to claim 1, wherein: the cross-section of the expansion section is gradually transited from a circle to a square, one side of an inlet of the expansion section is a semi-conical section, the tail end of the conical section is connected with a square section structure with a square cross-section, the width of the cross-section of the square section is larger than the inner diameter of the throat section, a long edge of one side of the conical section is connected with an outlet of the throat section, and a short edge of the other side of the conical section is connected with the square section.

3. A square outlet wet nozzle device according to claim 2, wherein: the length proportion of the throat section inner diameter, the square section inner diameter, the conical section small end and the conical section large end is as follows: 1:1.5:1.5:2.

4. A square outlet wet nozzle device according to claim 1, wherein: the left end of the output structure is provided with a conical structure, the side wall of the conical structure is provided with an air inlet, the air inlet is uniformly distributed along the circumferential direction of a conical surface of the output structure, an air passage is arranged at the joint of the conical section and the throat section, and the outside of the air inlet is communicated with the air passage.

5. A square outlet wet nozzle device according to claim 1, wherein: and an annular bump is arranged on the periphery of the joint of the input structure and the output structure.

6. A square outlet wet nozzle device according to claim 5, wherein: the water inlet is arranged in the lug, one end of the water inlet is outwards opened, the other end of the water inlet is of a conical structure, a water inlet is arranged in the conical structure and is connected with a water channel, the water channel is communicated with the throat section of the inner pipe, and threads are arranged on the inner surface layer of the water inlet.

7. A square outlet wet nozzle device according to claim 1, wherein: the outer tube is made of an aluminum alloy material.

8. A square outlet wet nozzle device according to claim 1, wherein: the inner tube is a tubular structure made of boron carbide.

Images