Small-sized self-rotating magnetic damping spray head

Abstract

The utility model discloses a small self-rotating magnetic damping sprayer which comprises a tailstock and a sprayer body. A plurality of eccentric and inclined nozzle holes are formed in the side wall of the spray head body; a small threaded hole, a cylindrical hole and a large threaded hole are sequentially formed in the center of the tailstock from front to back. The rear end of the mandrel penetrates through a through hole preset in the center of the spray head body and is in threaded connection with the small threaded hole; a sleeve part is arranged at the rear end of the spray head body, a red copper sleeve is in interference connection with the inner wall of the sleeve part, a plurality of magnet blocks which are uniformly distributed on the circumference are fixedly connected with the outer wall of the front part of the tailstock, and the polarities of every two adjacent magnet blocks are opposite; a gap is reserved between the magnet block and the red copper sleeve; and the outer diameter of the spray head body is smaller than or equal to that of the tailstock. The high-pressure water washing nozzle is not provided with a bearing, utilizes water film lubrication, is provided with a magnetic damping structure, prevents the rotating speed of the nozzle body from being too high, prolongs the service life, improves the reliability, and is compact in structure, and the outer diameter of the tailstock can be smaller than 30mm, so that the high-pressure water washing nozzle is suitable for high-pressure water washing of small-diameter pipelines.

Description

Technical Field

[0001] This utility model belongs to the field of high-pressure cleaning technology and relates to a self-rotating nozzle, specifically a small self-rotating magnetic damping nozzle. Background Technology

[0002] In the field of high-pressure water cleaning, self-rotating nozzles are commonly used to clean scale or debris inside pipes. The nozzle body has eccentric nozzle holes with a slight backward tilt angle, allowing it to rotate and self-advance due to the reaction force of the water jet during high-pressure water spraying. Typically, a bearing is installed between the nozzle and its base to support its high-speed rotation. For example, this bearing is shown in patent CN109876937A, entitled "Self-Rotating Nozzle." The problem is that for smaller diameter pipes, this limits the nozzle's size, making it difficult to arrange bearings and damping devices. Excessive rotation speed also exacerbates wear and reduces reliability. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a small self-rotating magnetic damping nozzle. The purpose is to design a compact, bearingless, self-rotating nozzle structure with damping, taking into account both space constraints and nozzle rotation speed limitations, thereby reducing internal wear, improving lifespan and reliability, and making it suitable for high-pressure water cleaning of small-diameter pipes.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a small self-rotating magnetic damping nozzle, comprising a tailstock and a nozzle body; the nozzle body has multiple eccentric and inclined nozzle holes on its sidewalls, used to drive the nozzle body to rotate and advance when spraying high-pressure water; the tailstock has a small threaded hole, a cylindrical hole, and a large threaded hole sequentially formed from front to back at its center; the large threaded hole is used to connect a connector for a high-pressure water pipe; the rear end of the spindle passes through a pre-set through hole in the center of the nozzle body and is threadedly connected to the small threaded hole, and its front part has a boss portion, which abuts against the stepped surface of a pre-set stepped hole at the front end of the nozzle body; the nozzle... The rear end of the body is provided as a sleeve for fitting onto the front of the tailstock; a copper sleeve is interference-fitted to the inner wall of the sleeve; multiple circumferentially distributed magnets are fixed to the outer wall of the front of the tailstock, with adjacent magnets having opposite polarities; a gap is left between the magnets and the copper sleeve; the outer diameter of the nozzle body is less than or equal to the outer diameter of the tailstock; the middle part of the spindle is clearance-fitted with the through hole; a blind hole at the rear end of the spindle communicates with the cylindrical hole; several water passage holes are provided on the front side wall of the blind hole, and the water passage holes correspond to the nozzle holes, allowing high-pressure water entering the blind hole to flow through the water passage holes and then be ejected from the nozzle holes.

[0005] As a further optimization, a small conical hole is provided between the small threaded hole and the cylindrical hole; the rear end of the mandrel is provided as a small conical head for sealing the rear end of the mandrel with the conical surface of the tailstock; a first overflow hole leading to the outside of the tailstock is provided at the junction of the small conical hole and the small threaded hole.

[0006] As a further optimization, a large conical hole is provided between the large threaded hole and the cylindrical hole for sealing with the conical surface of the high-pressure water pipe connector. A second overflow hole leading to the outside of the tailstock is provided at the junction of the large conical hole and the large threaded hole.

[0007] As a further optimization, an annular recess is provided on the side wall of the nozzle body corresponding to the water passage hole, which is used to form an annular cavity at the junction of the water passage hole and the nozzle hole.

[0008] As a further optimization, the outer diameter of the tailstock is less than 30mm.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This utility model does not have bearings, utilizes water film lubrication, and has a magnetic damping structure to prevent excessive rotation speed of the nozzle body, thereby improving its lifespan and reliability. Furthermore, it has a compact structure, and the outer diameter of the tailstock can be less than 30mm, making it suitable for high-pressure water cleaning of small-diameter pipes. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external outline structure of an embodiment of the present utility model;

[0012] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0013] The correspondence between the technical features in the figure and the reference numerals is as follows: Tailstock 1; Small threaded hole 11; Small conical hole 12; Cylindrical hole 13; Large conical hole 14; Large threaded hole 15; Magnet block 16; First overflow hole 17; Second overflow hole 18; Nozzle body 2; Nozzle hole 21; Through hole 22; Sleeve part 23; Copper sleeve 24; Annular recess 25; Mandrel 3; Boss part 31; Blind hole 32; Water passage hole 33. Detailed Implementation

[0014] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0015] Example 1: Please refer to Figure 1-2 ;

[0016] This embodiment provides a small self-rotating magnetic damping nozzle for cleaning dirt from the inner wall of small-diameter pipes; it includes a tailstock 1 and a nozzle body 2; the nozzle body 2 has multiple eccentric and inclined nozzle holes 21 on its side wall, which drive the nozzle body 2 to rotate and advance when spraying high-pressure water; the tailstock 1 has at least a small threaded hole 11, a cylindrical hole 13 and a large threaded hole 15 sequentially formed from front to back at its center; the large threaded hole 15 is used to connect a connector for the high-pressure water pipe; it can be seen that the tailstock 1 is the mounting base for the high-pressure water pipe and the rotating nozzle body 2, and directs the high-pressure water to the rotating nozzle body 2.

[0017] The rear end of the spindle 3 passes through the pre-set through hole 22 in the center of the nozzle body 2 and is threadedly connected to the small threaded hole 11. Its front end has a boss 31, which abuts against the stepped surface of the pre-set stepped hole at the front end of the nozzle body 2. The rear end of the nozzle body 2 is a sleeve 23, used to fit onto the front of the tailstock 1. A copper sleeve 24 is interference-fitted to the inner wall of the sleeve 23. Multiple circumferentially distributed magnet blocks 16 are fixed to the outer wall of the front part of the tailstock 1, with adjacent magnet blocks 16 having opposite polarities. A gap is left between the magnet blocks 16 and the copper sleeve 24. Thus, the spindle 3 connects the nozzle body 2 and the tailstock 1 together through a threaded connection. The rotating nozzle body 2 drives the copper sleeve 24, cutting the magnetic lines of force of the magnet blocks 16, thereby preventing the nozzle body 2 from rotating, thus forming a magnetic damping component.

[0018] The outer diameter of the nozzle body 2 is less than or equal to the outer diameter of the tailstock 1; the middle part of the spindle 3 is clearance-fitted with the through hole 22; it can be seen that the clearance-fitted part is the main wear area. The overflowing water flow, combined with the high-speed rotating nozzle body 2, forms a water film at this wear area, increasing lubrication and reducing wear. Furthermore, the blind hole 32 at the rear end of the spindle 3 communicates with the cylindrical hole 13. Several water passage holes 33 are provided on the front sidewall of the blind hole 32, corresponding to the nozzle hole 21, allowing high-pressure water flowing into the blind hole 32 to pass through the water passage holes 33 and then exit from the nozzle hole 21. The nozzle hole 21 is located on the sidewall of the nozzle body 2, making the nozzle structure compact and facilitating a reduction in the outer diameter of the nozzle. The magnetic damping assembly has no bearings and a compact structure, allowing the outer diameter of the nozzle body 2 to be minimized to meet the needs of cleaning small-diameter pipes.

[0019] To improve sealing, a small conical hole 12 is provided between the small threaded hole 11 and the cylindrical hole 13; the rear end of the mandrel 3 is provided as a small conical head for sealing the rear end of the mandrel 3 with the conical surface of the tailstock 1. The conical surface provides good sealing. However, considering that high-pressure water overflows and washes the threads of the small threaded hole 11 for a long time, causing wear, a first overflow hole 17 leading to the outside of the tailstock 1 is provided at the junction of the small conical hole 12 and the small threaded hole 11 to improve reliability.

[0020] Similarly, in order to improve sealing and reliability, a large conical hole 14 is provided between the large threaded hole 15 and the cylindrical hole 13 for sealing with the conical surface of the high-pressure water pipe joint. A second overflow hole 18 leading to the outside of the tailstock 1 is provided at the junction of the large conical hole 14 and the large threaded hole 15.

[0021] To ensure a more stable water flow, an annular recess 25 is provided on the side wall of the through hole 22 of the nozzle body 2, corresponding to the water passage 33. This recess forms an annular cavity at the junction of the water passage 33 and the nozzle hole 21. The annular cavity buffers the high-pressure water flow and facilitates a more stable overflow at the clearance fit, maintaining a more stable water film and ensuring more reliable water film lubrication.

[0022] The smallest outer diameter component is the mandrel 3. While ensuring its strength and functionality, the outer diameter of the mandrel 3 can be as small as 8mm, corresponding to an outer diameter of the tailstock 1 of less than 30mm. This meets the needs of cleaning small-diameter pipes.

[0023] In summary, this embodiment does not have bearings, utilizes water film lubrication, and has a magnetic damping structure to prevent excessive rotational speed of the nozzle body 2, thereby improving its lifespan and reliability. Furthermore, it has a compact structure, and the outer diameter of the tailstock 1 can be less than 30mm to make it suitable for high-pressure water cleaning of small-diameter pipes.

[0024] The parts of this utility model not described in detail are prior art; for those skilled in the art, the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A small self-rotating magnetic damping nozzle, comprising a tailstock (1) and a nozzle body (2); the nozzle body (2) has a plurality of eccentric and inclined nozzle holes (21) on its sidewall, for driving the nozzle body (2) to rotate and advance when spraying high-pressure water; characterized in that: The tailstock (1) has a small threaded hole (11), a cylindrical hole (13) and a large threaded hole (15) sequentially arranged from front to back at its center; the large threaded hole (15) is used to connect a connector for a high-pressure water pipe. The rear end of the spindle (3) passes through the pre-set through hole (22) in the center of the nozzle body (2) and is threaded to the small threaded hole (11). The front part of the spindle (3) is provided with a boss (31), which abuts against the stepped surface of the pre-set stepped hole at the front end of the nozzle body (2). The rear end of the nozzle body (2) is provided with a sleeve (23) for fitting into the front part of the tailstock (1). A copper sleeve (24) is interference-fitted to the inner wall of the sleeve (23). Multiple circumferentially distributed magnet blocks (16) are fixed to the outer wall of the front part of the tailstock (1). The polarities of two adjacent magnet blocks (16) are opposite. A gap is left between the magnet blocks (16) and the copper sleeve (24). The outer diameter of the nozzle body (2) is less than or equal to the outer diameter of the tailstock (1); the middle part of the spindle (3) is clearance-fitted with the through hole (22); The blind hole (32) at the rear end of the mandrel (3) is connected to the cylindrical hole (13). The front side wall of the blind hole (32) is provided with several water passage holes (33). The water passage holes (33) correspond to the nozzle hole (21). High-pressure water that enters the blind hole (32) flows through the water passage holes (33) and is then sprayed out from the nozzle hole (21).

2. The small self-rotating magnetic damping nozzle according to claim 1, characterized in that: A small conical hole (12) is provided between the small threaded hole (11) and the cylindrical hole (13); the rear end of the mandrel (3) is provided as a small conical head for sealing the rear end of the mandrel (3) with the conical surface of the tailstock (1); a first overflow hole (17) leading to the outside of the tailstock (1) is provided at the junction of the small conical hole (12) and the small threaded hole (11).

3. A small self-rotating magnetic damping nozzle according to claim 1, characterized in that: A large conical hole (14) is provided between the large threaded hole (15) and the cylindrical hole (13) for sealing with the conical surface of the high-pressure water pipe joint. A second overflow hole (18) leading to the outside of the tailstock (1) is provided at the junction of the large conical hole (14) and the large threaded hole (15).

4. A small self-rotating magnetic damping nozzle according to claim 1, characterized in that: On the side wall of the through hole (22) of the nozzle body (2), an annular recess (25) is provided corresponding to the water passage hole (33) to form an annular cavity at the junction of the water passage hole (33) and the nozzle hole (21).

5. A small self-rotating magnetic damping nozzle according to claim 1, characterized in that: The outer diameter of the tailstock (1) is less than 30 mm.

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