Venturi nozzle

Abstract

The utility model provides a kind of venturi nozzle, including venturi, the one end of venturi is connected with backflush nozzle by support, the backflush nozzle is provided with external thread away from the one end of venturi, the venturi inner wall is equipped with cleaning blade along its arc direction, the cleaning blade is arranged closely with venturi inner wall, the cleaning blade is slidably connected with the one end of venturi end portion by backflush nozzle, the one end of venturi away from backflush nozzle is equipped with twist component, the twist component is fixedly connected with cleaning blade;The nozzle can periodically clean venturi wall, ensure the normal injection of venturi, ensure the orderly production, and structure design is simple and reasonable, easy to operate.

Description

Technical Field

[0001] This utility model belongs to the field of fluid velocity measurement technology, specifically relating to a Venturi nozzle. Background Technology

[0002] The Venturi effect, also known as the Venturi scrambogey effect, is a phenomenon where confined flow experiences an increase in velocity when passing through a narrowed cross-section. The velocity is inversely proportional to the cross-sectional area. Bernoulli's law states that this increase in velocity is accompanied by a decrease in fluid pressure, hence the common Venturi phenomenon. In simpler terms, this effect refers to the creation of low pressure near a high-speed flowing fluid, resulting in adsorption. This effect is used to manufacture Venturi tubes, which are widely used in civil and industrial building piping, HVAC, and air conditioning systems. However, in the chemical industry, especially in highly corrosive and easily crystallizing environments containing fluorine and silicon, prolonged use can lead to crystal formation on the Venturi tube walls, resulting in a decrease in the spray absorption effect and significantly impacting production. Furthermore, damaged nozzles are often irreparable, difficult to procure, and costly to purchase. Corroded parts are essentially unrepairable and must be scrapped, resulting in substantial waste.

[0003] In view of this, in order to solve the above-mentioned technical problems, this utility model proposes a Venturi nozzle that can periodically clean the Venturi tube wall to ensure normal Venturi spraying. The nozzle has a simple and reasonable structural design and is easy to operate. Utility Model Content

[0004] This utility model provides a Venturi nozzle that allows for regular cleaning of the Venturi tube wall, ensuring proper spraying. The nozzle also features a simple and reasonable structural design and is easy to operate. The specific solution is as follows: A venturi nozzle includes a venturi tube, one end of which is connected to a backflush nozzle via a bracket. The backflush nozzle has an external thread at the end opposite to the venturi tube. A cleaning scraper is provided on the inner wall of the venturi tube along its arc direction. The cleaning scraper is arranged in close contact with the inner wall of the venturi tube. The cleaning scraper is slidably connected to the end of the venturi tube at the end near the backflush nozzle. A torsion assembly is provided at the end of the venturi tube away from the backflush nozzle. The torsion assembly is fixedly connected to the cleaning scraper.

[0005] Furthermore, the torsion assembly includes a rotating sleeve and a limiting card. The end of the venturi tube away from the backjet nozzle is a cylindrical structure. The rotating sleeve is sleeved on the outer wall of the venturi tube. Limiting cards are horizontally connected to the opposite sides of the rotating sleeve away from the opening end of the venturi tube. Displacement grooves suitable for limiting cards are respectively opened on the opposite sides of the cylindrical end of the venturi tube.

[0006] Furthermore, an annular groove is provided on the outer periphery of the venturi tube opening, and multiple spring positioning beads are evenly spaced along the circumference of the inner wall of the rotating sleeve.

[0007] Furthermore, a lever is horizontally connected to the outer periphery of the rotating sleeve.

[0008] Furthermore, the venturi nozzle also includes two connecting rings. The bracket and the venturi tube are respectively fixedly connected to the two connecting rings. The two connecting rings are each provided with multiple through holes evenly spaced along their circumference and connected by fixing bolts. The two connecting rings are each provided with annular grooves along their circumference on opposite sides. The cleaning scraper is provided with a slider that can slide in the annular groove at one end near the bracket. The slider is detachably connected to the end of the cleaning scraper by screws.

[0009] Furthermore, a rubber buffer sleeve is provided between the two connecting rings.

[0010] Furthermore, the venturi tube, backflush nozzle, and cleaning blade are all made of silicon carbide.

[0011] Furthermore, the cleaning scraper has chamfered structures on both sides facing the inner wall of the venturi tube.

[0012] The beneficial effects of this utility model are: This utility model discloses a venturi nozzle. By incorporating a cleaning scraper on the inner wall of the venturi tube and a rotating sleeve fitted at the end of the venturi tube, along with chamfered sides on the cleaning scraper, when crystals appear on the inner wall of the venturi tube requiring cleaning, the rotating sleeve can be rotated to make the cleaning scraper move along the inner wall of the venturi tube to clean the crystals, thus ensuring the cleanliness of the tube wall and the normal spraying of the venturi, guaranteeing orderly production. Furthermore, by designing the venturi nozzle as a two-part structure consisting of the venturi tube and the support, it allows for separate replacement of either the venturi tube or the backflush nozzle when damaged, effectively saving costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a top view of the present invention.

[0015] Figure 3 for Figure 2 Sectional view of AA.

[0016] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0017] Figure 5 This is a schematic diagram of the interior of the venturi tube of this utility model. Figure 6 This is a partial schematic diagram of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Venturi tube; 2. Support; 3. Backflush nozzle; 4. Cleaning scraper; 5. Rotating sleeve; 6. Limiting card; 7. Displacement groove; 8. Circular groove; 9. Spring positioning bead; 10. Toggle block; 11. Connecting ring; 12. Circular slide groove; 13. Slider. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] See Figures 1-6 A venturi nozzle includes a venturi tube 1. One end of the venturi tube 1 is connected to a backflushing nozzle 3 via a bracket 2. The backflushing nozzle 3 has an external thread at the end away from the venturi tube 1. A cleaning scraper 4 is provided on the inner wall of the venturi tube 1 along its arc direction. The cleaning scraper 4 is arranged in close contact with the inner wall of the venturi tube 1. The cleaning scraper 4 is slidably connected to the end of the venturi tube 1 at the end near the backflushing nozzle 3. A torsion assembly is provided at the end of the venturi tube 1 away from the backflushing nozzle 3. The torsion assembly is fixedly connected to the cleaning scraper 4.

[0021] The preferred twisting assembly includes a rotating sleeve 5 and a limiting card 6. The end of the venturi tube 1 away from the backflushing nozzle 3 is a cylindrical structure. The rotating sleeve 5 is sleeved on the outer wall of the venturi tube 1. The limiting cards 6 are horizontally connected to the opposite sides of the rotating sleeve 5 away from the opening end of the venturi tube 1. The opposite sides of the cylindrical end of the venturi tube 1 are respectively provided with displacement grooves 7 suitable for the limiting cards 6. When the rotating sleeve 5 is installed, the limiting cards 6 slide along the displacement grooves 7. When the two limiting cards 6 are away from the opening end of the venturi tube 1 and the rotating sleeve 5 is twisted, the venturi tube 1 can be used. In use, rotating the rotating sleeve 5 can make the cleaning scraper 4 scrape away the crystals along the wall of the venturi tube 1.

[0022] The preferred Venturi tube 1 has an annular groove 8 on the outer periphery of its open end, and the inner wall of the rotating sleeve 5 is provided with a plurality of spring positioning beads 9 evenly spaced along its circumference. The arrangement of the spring positioning beads 9 makes it easier to reduce resistance and save effort when rotating the rotating sleeve 5.

[0023] The preferred rotating sleeve 5 is horizontally connected to a lever 10 on its outer periphery. The lever 10 is designed to facilitate easier cleaning of the crystals on the wall of the venturi tube 1 by rotating the lever 10.

[0024] The preferred venturi nozzle also includes two connecting rings 11. The bracket 2 and the venturi tube 1 are respectively fixedly connected to the two connecting rings 11. The two connecting rings 11 are each provided with multiple through holes evenly spaced along their circumference and connected by fixing bolts. The two connecting rings 11 are provided with annular grooves 12 along their circumference on opposite sides. The cleaning scraper 4 is provided with a slider 13 at one end near the bracket 2, which can slide in the annular groove 12. The slider 13 is detachably connected to the end of the cleaning scraper 4 by screws. When installing the cleaning scraper 4, it is first inserted into the venturi tube 1 from the end away from the bracket 2 and its end reaches the end of the bracket 2. Then the slider 13 is fixed to the end of the cleaning scraper 4 by screws. Finally, the two connecting rings 11 are fixedly connected by bolts. By designing the venturi nozzle as a two-part structure with the venturi tube and the bracket as the main body, the venturi tube or the backflush nozzle can be replaced separately when damaged, which effectively saves costs.

[0025] A rubber buffer sleeve is preferably provided between the two connecting rings 11, wherein the rubber buffer sleeve facilitates a more secure connection between the two connecting rings 11.

[0026] The preferred venturi tube 1, backflush nozzle 3, and cleaning scraper 4 are all made of silicon carbide. The use of silicon carbide to make the venturi tube 1, backflush nozzle 3, and cleaning scraper 4 can extend the service life of the venturi tube 1. Furthermore, the hardness, wear resistance, and corrosion resistance of silicon carbide can slow down the rate at which the components are easily corroded and damaged.

[0027] The preferred cleaning scraper 4 has chamfered structures on both sides facing the inner wall of the venturi tube 1.

[0028] The working principle of this utility model is as follows: When crystals appear on the inner wall of the Venturi tube 1, the toggle block 10 is moved to rotate the rotating sleeve 5. The spring positioning bead 9 rolls along the annular groove 8, and the slider 13 slides along the annular sliding groove 12. This drives the cleaning scraper 4 to rotate along the tube wall of the Venturi tube 1, thereby scraping and cleaning the crystals on the tube wall of the Venturi tube 1, ensuring the cleanliness of the tube wall and the normal spraying of the Venturi, thus ensuring the orderly progress of production. When the backflushing nozzle 3 or the Venturi tube 1 is damaged due to long-term use and needs to be replaced, it is only necessary to remove the bolts on the two connecting rings 11 and replace the corresponding parts, which greatly saves production costs.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A venturi nozzle, characterized in that: The device includes a venturi tube (1), one end of which is connected to a backflushing nozzle (3) via a bracket (2). The backflushing nozzle (3) has an external thread at the end away from the venturi tube (1). A cleaning scraper (4) is provided on the inner wall of the venturi tube (1) along its arc direction. The cleaning scraper (4) is arranged in close contact with the inner wall of the venturi tube (1). The cleaning scraper (4) is slidably connected to the end of the venturi tube (1) at the end near the backflushing nozzle (3). A torsion assembly is provided at the end of the venturi tube (1) away from the backflushing nozzle (3). The torsion assembly is fixedly connected to the cleaning scraper (4).

2. A venturi nozzle according to claim 1, characterized in that: The twisting assembly includes a rotating sleeve (5) and a limiting card (6). The end of the venturi tube (1) away from the back jet nozzle (3) is a cylindrical structure. The rotating sleeve (5) is sleeved on the outer wall of the venturi tube (1). The limiting cards (6) are horizontally connected to the opposite sides of the rotating sleeve (5) away from the opening end of the venturi tube (1). The cylindrical end of the venturi tube (1) is provided with displacement grooves (7) suitable for the limiting cards (6) on the opposite sides.

3. A venturi nozzle according to claim 2, characterized in that: The venturi tube (1) has an annular groove (8) on the outer periphery of its open end, and the inner wall of the rotating sleeve (5) is provided with a plurality of spring positioning beads (9) evenly spaced along its circumference.

4. A venturi nozzle according to claim 2, characterized in that: A lever (10) is horizontally connected to the outer periphery of the rotating sleeve (5).

5. A venturi nozzle according to claim 1, characterized in that: The Venturi nozzle also includes two connecting rings (11). The bracket (2) and the Venturi tube (1) are fixedly connected to the two connecting rings (11). The two connecting rings (11) are provided with multiple through holes evenly spaced along their circumference and connected by fixing bolts. The two connecting rings (11) are provided with annular grooves (12) along their circumference on opposite sides. The cleaning scraper (4) is provided with a slider (13) that can slide in the annular groove (12) at one end near the bracket (2). The slider (13) is detachably connected to the end of the cleaning scraper (4) by screws.

6. A venturi nozzle according to claim 5, characterized in that: A rubber buffer sleeve is provided between the two connecting rings (11).

7. A venturi nozzle according to claim 1, characterized in that: The Venturi tube (1), the backflush nozzle (3), and the cleaning scraper (4) are all made of silicon carbide.

8. A venturi nozzle according to claim 1, characterized in that: The cleaning scraper (4) has chamfered structures on both sides facing the inner wall of the venturi tube (1).

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