High-pressure water jet sand blasting nozzle group

Abstract

The utility model discloses a high-pressure water jet sand blasting nozzle group which comprises a base, at least two annular high-pressure cavities are formed in the base at intervals, the high-pressure cavities are connected in series through a water passing channel formed in the base, and the water passing channel is communicated with a water inlet formed in the base; the sand supply pipes and the sand-water mixing nozzles are coaxially arranged with the high-pressure cavity and fixed on the base, the sand supply pipes are communicated with the sand-water mixing nozzles, and the sand-water mixing nozzles are communicated with the high-pressure cavity through water nozzles formed on the base. Due to the fact that all the high-pressure cavities are integrated in the same base and connected in series through the internal water passing channels, the whole sprayer set can supply water to all the high-pressure cavities at the same time only through one main water inlet pipe, and therefore the number of water inlet pipes can be remarkably reduced. Meanwhile, a plurality of sand supply pipes and a plurality of sand-water mixing nozzles are directly fixed on the base to form a plurality of high-pressure water jet sand blasting nozzles which are arranged at intervals, and the high-pressure water jet sand blasting nozzles can be fixed and the angle and the target distance can be uniformly adjusted only by installing and debugging the base.

Description

Technical Field

[0001] This utility model mainly relates to the field of high-pressure water jet equipment technology, and in particular to high-pressure water jet sandblasting nozzles. Background Technology

[0002] High-pressure water jet sandblasting nozzles are key components of equipment for sandblasting, descaling, and rust removal cleaning of steel and other metal materials. Existing high-pressure water jet sandblasting nozzles are single-unit structures, typically comprising a nozzle body. One end of the nozzle body is connected to a sand-water mixing nozzle, and the other end is connected to a sand supply pipe. A central body is located in the center of the nozzle body's inner cavity, on which several water nozzles are formed along the axial direction. Within the inner cavity of the nozzle body, a cavity is provided at one end of the water nozzle inlet, and this cavity communicates with the inner hole of the high-pressure water interface (e.g., a replaceable and modular high-pressure water jet sandblasting nozzle disclosed in Chinese patent document CN203371394U).

[0003] However, the cleaning width of a single high-pressure water jet blasting nozzle is limited, while the workpiece to be cleaned (such as steel strips or plates) is often quite wide, and the cleaning width of a single high-pressure water jet blasting nozzle is usually insufficient to cover the width of the workpiece. Therefore, in existing technologies, multiple independent high-pressure water jet blasting nozzles are usually arranged evenly at a certain interval on one or both sides of the workpiece to be cleaned, so that the effective cleaning area of ​​each high-pressure water jet blasting nozzle is superimposed to cover the width of the workpiece. However, this method of combining multiple independent high-pressure water jet blasting nozzles has at least the following disadvantages: 1. Each independent high-pressure water jet blasting nozzle needs to be connected to a high-pressure water pipe and a sand supply pipe. The more high-pressure water jet blasting nozzles there are, the more pipelines there are, greatly increasing the difficulty of connecting and maintaining the pipelines; 2. Each high-pressure water jet blasting nozzle needs to be individually fixed on the nozzle holder and independently adjusted to the same angle and target distance, resulting in an excessive workload for installation, fixing, and debugging.

[0004] Therefore, it is necessary to design a series high-pressure water jet sandblasting nozzle assembly to reduce the number of pipelines and the workload of installation, fixing and commissioning. Utility Model Content

[0005] The technical problem this invention aims to solve is how to reduce the number of pipelines and the workload of installing, fixing, and debugging high-pressure water jet sandblasting nozzles.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] The high-pressure water jet sandblasting nozzle assembly includes a base with at least two annular high-pressure chambers spaced apart. Each high-pressure chamber is connected in series via a water passage formed within the base, which is connected to a water inlet formed within the base. It also includes several sand supply pipes and sand-water mixing nozzles coaxially arranged with the high-pressure chambers and fixed to the base. The sand supply pipes are connected to the sand-water mixing nozzles, and the sand-water mixing nozzles are connected to the high-pressure chambers via water nozzles formed within the base. Because all high-pressure chambers are integrated within the same base and connected in series via internal water passages, the entire nozzle assembly requires only one main water inlet pipe to simultaneously supply water to all high-pressure chambers. This significantly reduces the number of inlet pipes, thereby reducing the complexity of pipe connections and the workload associated with leak detection and inlet pipe replacement. Meanwhile, multiple sand supply pipes and sand-water mixing nozzles are directly fixed to the base, forming multiple high-pressure water jet sandblasting nozzles arranged at intervals. This is equivalent to integrating several individual high-pressure water jet sandblasting nozzles in the existing technology onto the same base. During installation and commissioning, it is not necessary to fix each high-pressure water jet sandblasting nozzle to the nozzle frame separately. Instead, only the base needs to be fixed. Since the relative positions of each high-pressure water jet sandblasting nozzle are already determined on the base, the angle and target distance of each high-pressure water jet sandblasting nozzle can be uniformly adjusted simply by moving the base. Therefore, the workload of installing, fixing, and commissioning high-pressure water jet sandblasting nozzles can be greatly reduced.

[0008] The high-pressure chamber intersects with the water passage. Specifically, the neutral plane of the high-pressure chamber is tangent to the centerline of the water passage. This connection method allows the high-pressure water in the water passage to flow more smoothly and evenly into each high-pressure chamber, reducing the resistance and eddy current phenomenon at the connection point. This ensures that the high-pressure water smoothly transitions from the water passage to each high-pressure chamber, minimizing energy loss and ensuring that the high-pressure water enters the subsequent water nozzles and sand-water mixing nozzles in a more efficient state, thereby improving the uniformity and cleaning effect of sandblasting.

[0009] At the intersection of the high-pressure chamber and the water passage, the projection along the axial direction of the water passage is such that the cross-sectional projection of the high-pressure chamber is larger than that of the water passage, and the cross-sectional projection of the water passage lies within the cross-sectional projection of the high-pressure chamber. This cross-sectional design prevents water flow from directly impacting the external area of ​​the high-pressure chamber, thereby reducing the pressure drop of the water flow, ensuring that high-pressure water is evenly distributed to each high-pressure chamber, and ensuring that each nozzle connected to the high-pressure chamber receives relatively uniform and stable high-pressure water. This guarantees that the pressure of the sand-water mixture sprayed from each sand-water mixing nozzle is basically consistent, thus reducing the difference in cleaning effect between different areas of the surface to be cleaned.

[0010] At least one end of the water passage extends through the side of the base, and a sealing plug is detachably installed at the through end. The through end of the water passage can serve as a cleaning or sand discharge port. The sealing plug can be removed periodically to clean the entire water passage with tools or high-pressure water, which facilitates daily maintenance and reduces maintenance difficulty.

[0011] There are two water passages, located on either side of the high-pressure chamber. This dual-channel arrangement allows high-pressure water to flow in simultaneously from both sides of the high-pressure chamber, achieving water flow balance and ensuring even distribution of high-pressure water to all chambers. This further improves the uniformity of high-pressure water distribution within each chamber and avoids the uneven water pressure distribution that might occur with a single water passage. Simultaneously, the two water passages can also serve as backups; if one passage becomes blocked or malfunctions, the other can temporarily maintain some functionality, ensuring continuous operation of the equipment.

[0012] The water inlet is connected to the middle of the water passage. The water inlet in the middle ensures that the water flow is distributed equally to the two high-pressure chambers, resulting in a more uniform pressure distribution. This reduces pressure fluctuations and ensures that the water pressure in each high-pressure chamber is balanced.

[0013] A filter screen is installed at the water inlet end of the water inlet. The filter screen can filter the high-pressure water entering the water inlet, preventing impurities in the water from entering the water passage, high-pressure chamber, water nozzle, and sand-water mixing nozzle, etc., avoiding blockage or wear of these structures caused by impurities, extending the service life of various parts of the equipment, and reducing the frequency of failures and maintenance caused by impurities.

[0014] The sand-water mixing nozzle includes a locking component detachably fixed to the lower side of the base. A wear-resistant nozzle is detachably installed on the inner side of the locking component, and a transition cone is clamped between the wear-resistant nozzle and the base. The wear-resistant nozzle is the part of the sand-water mixing nozzle that directly contacts the sand-water mixture and is prone to wear. Its detachable design means that when the wear-resistant nozzle wears out, it is not necessary to replace the entire sand-water mixing nozzle; only the wear-resistant nozzle needs to be replaced, reducing replacement costs and maintenance difficulty. The detachable locking component facilitates the installation and replacement of the wear-resistant nozzle. The transition cone optimizes the flow path of the sand-water mixture, reduces flow resistance, and improves the sandblasting effect. The transition cone is a steel quenched part with wear resistance between that of the locking component and the wear-resistant nozzle. As a transition structure between the base and the wear-resistant nozzle, it protects the locking component and reduces the length of the wear-resistant nozzle, thereby reducing the manufacturing and replacement costs of the wear-resistant nozzle.

[0015] The high-pressure chamber has an open top, and a pressure cap is detachably installed at the open end. The open design, combined with the detachable pressure cap, allows maintenance personnel to visually inspect and clean the interior of the high-pressure chamber. The operation is convenient, eliminating the need for large-scale disassembly of the base, reducing the complexity of maintenance, and facilitating daily maintenance and troubleshooting of the equipment.

[0016] The sand supply pipe is detachably connected to the base or gland. During long-term use, the sand supply pipe may experience blockages or wear; its detachable connection makes replacement, maintenance, and cleaning of the sand supply pipe more convenient and faster. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of a high-pressure water jet sandblasting nozzle assembly;

[0018] Figure 2 This is a top view of a high-pressure water jet sandblasting nozzle assembly.

[0019] Figure 3 This is a side view of a high-pressure water jet sandblasting nozzle assembly;

[0020] Figure 4 yes Figure 1 A cross-sectional schematic diagram of AA in the middle;

[0021] Figure 5 yes Figure 1 Cross-sectional schematic diagram of BB;

[0022] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle;

[0023] Figure 7 yes Figure 1 A cross-sectional view of CC.

[0024] The labels in the diagram represent:

[0025] 1. Base; 11. High-pressure chamber; 12. Water passage; 121. Sealing plug; 13. Water inlet; 131. Filter screen; 14. Water nozzle; 15. Limiting shoulder; 16. Connecting hole;

[0026] 2. Sand supply pipe; 21. Shaft shoulder;

[0027] 3. Sand-water mixing nozzle; 31. Locking component; 32. Wear-resistant nozzle; 33. Transition cone; 34. Second clamping nut;

[0028] 4. Cover; 41. Base plate; 42. Connecting platform; 43. First clamping nut. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example

[0031] like Figures 1 to 7As shown, in this embodiment, the high-pressure water jet sandblasting nozzle assembly includes a rectangular plate-shaped base 1. In the base 1, six annular high-pressure chambers 11 are formed at intervals along its length. Each high-pressure chamber 11 is connected in series via two straight water passages 12 formed in the base 1. The two water passages 12 are arranged on both sides of the high-pressure chamber 11 and both intersect with the high-pressure chamber 11. At the intersection of the high-pressure chamber 11 and the water passage 12, the projection along the axial direction of the water passage 12 is larger than the projection of the cross-section of the high-pressure chamber 11 than the projection of the cross-section of the water passage 12, and the projection of the cross-section of the water passage 12 is located within the projection of the cross-section of the high-pressure chamber 11. Specifically, the neutral surface 1a of the high-pressure cavity 11 is tangent to the centerline 1b of the water passage 12. At the intersection of the high-pressure cavity 11 and the water passage 12, the central axis of the water passage 12 is located at the geometric center of the rectangle formed by the bottom surface, inner wall, outer wall and top surface of the high-pressure cavity 11. That is, the central axis of the water passage 12 is H / 2 away from the bottom surface and the top surface of the high-pressure cavity 11 (where H is the vertical depth of the high-pressure cavity 11), and the central axis of the water passage 12 is (D1) / 2 + (D2-D1) / 4 away from the central axis of the high-pressure cavity 11 (where D1 is the diameter of the inner wall of the high-pressure cavity 11 and D2 is the diameter of the outer wall of the high-pressure cavity 11). Furthermore, the apertures φd of the two water passages 12 are equal and less than the vertical depth and lateral width of the high-pressure cavity 11 (i.e. φd < H and φd < (D2-D1) / 2).

[0032] Of the two water passages 12, the left end of one of them is connected to the left side of the base 1, and the right end of the other is connected to the right side of the base 1. A sealing plug 121 can be detachably installed at the through end of the water passage 12. Specifically, the sealing plug 121 is a sealing screw plug, which is threaded to the through end of the water passage 12, and a sealing ring is also clamped between the sealing plug 121 and the through end of the water passage 12.

[0033] In the middle of the base 1, a horizontally extending high-pressure water inlet hole 13 is formed, which is perpendicularly connected to the middle of the two water passages 12. Specifically, the cross-sectional area of ​​the high-pressure water inlet hole 13 is larger than the sum of the cross-sectional areas of the two water passages 12, and a filter screen 131 is installed at the inlet end of the high-pressure water inlet hole 13, and threads for connecting an external high-pressure water inlet pipe are formed on its outer wall.

[0034] In this embodiment, the high-pressure water jet sandblasting nozzle assembly also includes six sand supply pipes 2 coaxially arranged with the high-pressure chamber 11 and fixed on the base 1, and six sand-water mixing nozzles 3. The sand supply pipes 2 are configured as straight tubular structures, with their inlet end protruding from the upper surface of the base 1 and their outlet end penetrating the base 1 and inserting into the inner cavity of the sand-water mixing nozzle 3. The top of the base 1 is flat, and the upper end of the high-pressure chamber 11 is open. Six pressure caps 4 are installed on the top of the base 1, each pressure cap 4 sealing one high-pressure chamber 11. A sealing ring is clamped between the top surface of the base 1 and the bottom surface of the pressure cap 4, at the inner and outer side walls of the high-pressure chamber 11. Specifically, the pressure cap 4 includes a rectangular base plate 41 that fits against the upper surface of the base 1, with a columnar connecting platform 42 protruding upward in its middle. The center of the base plate 41 and the connecting platform 42 is formed with a channel adapted to the sand supply pipes 2, and the outer wall of the connecting platform 42 is threaded. To limit the forward and backward movement of the substrate 41, a limiting shoulder 15 is formed on each of the front and rear sides of the upper surface of the base 1. The substrate 41 is clamped in the gap between the two limiting shoulders 15. Furthermore, the substrate 41 and the base 1 are fixed by four bolts evenly surrounding the high-pressure chamber 11. The upper section of the sand supply pipe 2 is formed with a shoulder 21, which fits against the top of the connecting platform 42, and a sealing ring is clamped between them. A first clamping nut 43 is threaded onto the outside of the connecting platform 42, and the first clamping nut 43 pushes the shoulder 21 to press against the top of the connecting platform 42. In other embodiments, the upper end of the high-pressure chamber 11 can also be set in a closed state. In this case, there is no need to set the pressure cap 4. In this case, the sand supply pipe 2 is directly connected to the base 1.

[0035] In this embodiment, the sand-water mixing nozzle 3 includes a locking member 31 detachably fixed to the lower side of the base 1. The locking member 31 is configured as a hollow rotating body structure and is threadedly connected to the connecting hole 16 formed on the lower side of the base 1. A wear-resistant nozzle 32 is detachably installed on the inner side of the locking member 31. A transition cone 33 is clamped in the gap formed between the wear-resistant nozzle 32 and the base 1. The transition cone 33 is configured as a cylindrical rotating structure with a hollow cone on the inner side. Specifically, a second clamping nut 34 is threaded to the lower section of the locking member 31. The second clamping nut 34 abuts against the lower end of the wear-resistant nozzle 32. Under the push of the second clamping nut 34, the wear-resistant nozzle 32 squeezes the transition cone 33. Furthermore, a sealing ring is also clamped between the locking member 31 and the second clamping nut 34. Even further, the middle section of the locking member 31 protrudes outward in a hexagonal prism shape to facilitate disassembly and assembly.

[0036] In this embodiment, four water nozzles 14 are uniformly formed circumferentially along the high-pressure chamber 11 on the base 1. One end of each water nozzle 14 is connected to the high-pressure chamber 11, and the other end is connected to the inner cavity of the sand-water mixing nozzle 3. The center lines of each water nozzle 14 converge at a point or on a straight line. The water nozzle 14 is either a drilled hole on the base 1 or an independent structure embedded in the base 1.

[0037] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A high-pressure water jet sandblasting nozzle assembly, characterized in that: The system includes a base (1) with at least two annular high-pressure chambers (11) formed at intervals. Each high-pressure chamber (11) is connected in series via a water passage (12) formed in the base (1). The water passage (12) is connected to a water inlet (13) formed in the base (1). The system also includes several sand supply pipes (2) and sand-water mixing nozzles (3) that are coaxially arranged with the high-pressure chambers (11) and fixed on the base (1). The sand supply pipes (2) are connected to the sand-water mixing nozzles (3), and the sand-water mixing nozzles (3) are connected to the high-pressure chambers (11) via a water nozzle (14) formed in the base (1).

2. The high-pressure water jet sandblasting nozzle assembly according to claim 1, characterized in that: The high-pressure chamber (11) intersects with the water passage (12).

3. The high-pressure water jet sandblasting nozzle assembly according to claim 2, characterized in that: At the intersection of the high-pressure cavity (11) and the water passage (12), the projection along the axial direction of the water passage (12) is such that the cross-sectional projection of the high-pressure cavity (11) is greater than the cross-sectional projection of the water passage (12), and the cross-sectional projection of the water passage (12) is located within the cross-sectional projection of the high-pressure cavity (11).

4. The high-pressure water jet sandblasting nozzle assembly according to claim 1, characterized in that: At least one end of the water passage (12) extends through the side of the base (1), and a sealing plug (121) is detachably installed at the through end.

5. The high-pressure water jet sandblasting nozzle assembly according to any one of claims 1-4, characterized in that: There are two water passages (12), which are located on both sides of the high-pressure chamber (11).

6. The high-pressure water jet sandblasting nozzle assembly according to claim 1, characterized in that: The water inlet (13) is connected to the middle of the water passage (12).

7. The high-pressure water jet sandblasting nozzle assembly according to claim 1, characterized in that: A filter screen (131) is installed at the water inlet end of the water inlet hole (13).

8. The high-pressure water jet sandblasting nozzle assembly according to claim 1, characterized in that: The sand-water mixing nozzle (3) includes a locking member (31) that is detachably fixed to the lower side of the base (1). A wear-resistant nozzle (32) is detachably installed on the inner side of the locking member (31). A transition cone (33) is clamped between the wear-resistant nozzle (32) and the base (1).

9. The high-pressure water jet sandblasting nozzle assembly according to claim 1, characterized in that: The upper end of the high-pressure chamber (11) is open, and a pressure cap (4) is detachably installed on the open end.

10. The high-pressure water jet sandblasting nozzle assembly according to claim 9, characterized in that: The sand supply pipe (2) is detachably connected to the base (1) or the cover (4).

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