An ultra-high pressure self-rotating cleaning nozzle

Abstract

The present invention belongs to the technical field of cleaning equipment, and particularly refers to an ultra-high pressure self-rotating cleaning nozzle, comprising a hollow rotating shaft, a rotating head connected to the front end of the rotating shaft, a shell sleeved on the outer periphery of the rotating shaft, and a connecting nut fixed to the rear end of the shell, wherein the shell is provided with an annular assembly seat for dividing the inner cavity of the shell into a front cavity and a rear cavity, the rotating shaft passes through the annular assembly seat and extends into the rear cavity, a sealing sleeve is provided in the shell on the front side of the connecting nut, a sealing member sleeved on the rotating shaft is provided between the front end of the sealing sleeve and the rotating shaft, a sealing seat is sleeved on the rotating shaft on the front side of the sealing sleeve, a tapered hole with a smaller inner diameter at the front and a larger inner diameter at the rear end of the sealing seat is provided, the front end of the sealing member is a tapered surface adapted to the tapered hole, and the rear end of the sealing seat and the sealing member are sealed against each other through the tapered hole and the tapered surface. The sealing structure of the rotating shaft, the shell, and the connecting nut of the present invention has low requirements for processing and assembly, and is low in cost.

Description

Technical field:

[0001] The invention belongs to the technical field of cleaning equipment, in particular to an ultra-high pressure self-rotating cleaning nozzle. Background technology:

[0002] High pressure cleaning is cleaning using high pressure water jets.

[0003] Chinese invention patent 202120774823.5 discloses a self-rotating cleaning nozzle, comprising a hollow rotating shaft, a rotating head connected to the front end of the rotating shaft, a shell sleeved on the outer periphery of the rotating shaft, and a connecting nut fixed to the rear end of the shell, wherein a pressure water channel is formed between the connecting nut, the rotating shaft and the inner cavity of the rotating head, and the front end of the rotating head is circumferentially distributed with spray holes connected to the inner cavity, and the spray holes are inclined and eccentrically arranged relative to the central axis of the rotating head. A sealing groove connected to the inner hole of the rotating shaft is provided at the rear end of the rotating shaft, and a sealing ring seat 1 with an inner hole is fixed circumferentially in the sealing groove, and a mounting groove connected to the inner hole of the connecting nut is provided at the front end of the connecting nut, and a sealing ring seat 2 with an inner hole is fixed circumferentially in the mounting groove, and the rear end face of the sealing ring seat 1 is fitted with the front end face of the sealing ring seat 2 to form a dynamic sealing structure, and an elastic gasket is provided between the sealing ring seat 1 and the sealing groove and / or between the sealing ring seat 2 and the mounting groove.

[0004] The above-mentioned rotating shaft and connecting nut are rotatably sealed through the sealing ring seat 1 and the sealing ring seat 2. The rear end face of the sealing ring seat 1 and the front end face of the sealing ring seat 2 are easily worn, and if the center lines of the sealing ring seat 1 and the sealing ring seat 2 are tilted to each other, the front end face of the sealing ring seat 2 and the rear end face of the sealing ring seat 1 are in contact on one side and not on the other side, and the sealing ring seat 2 generates a large rotation resistance to the sealing ring seat 1, that is, resistance to the rotation of the rotating shaft. Therefore, the processing and assembly requirements of the sealing ring seat 1 and the sealing ring seat 2 are high, and the production cost is high. Summary of the invention:

[0005] The purpose of the present invention is to provide an ultra-high pressure self-rotating cleaning nozzle, the sealing structure of which the rotating shaft, the housing and the connecting nut have low requirements on processing and assembly and low cost.

[0006] The present invention is achieved in that:

[0007] A super-high pressure self-rotating cleaning nozzle comprises a hollow rotating shaft, a rotating head connected to the front end of the rotating shaft, a shell sleeved on the outer periphery of the rotating shaft, and a connecting nut fixed at the rear end of the shell, a pressure water channel is formed among the connecting nut, the rotating shaft and the rotating head, an annular assembly seat is provided in the shell for dividing the inner cavity of the shell into a front cavity and a rear cavity, the rotating shaft passes through the annular assembly seat and extends into the rear cavity, a sealing sleeve is provided in the shell at the front side of the connecting nut, a sealing member sleeved on the rotating shaft is provided between the front end of the sealing sleeve and the rotating shaft, a sealing seat is sleeved on the rotating shaft at the front side of the sealing sleeve, the front end face of the sealing seat is in conflict with the annular assembly seat, and the rear end face is in conflict with the front end face of the sealing sleeve, a tapered hole with a smaller inner diameter at the front and a larger inner diameter at the rear end of the sealing seat is provided, the front end of the sealing member is a tapered surface matched with the tapered hole, and the rear end of the sealing seat is sealed with the seal by the tapered hole and the tapered surface.

[0008] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, a water outlet groove is provided on the side wall of the shell, and the sealing seat is inclined from the front end surface to the outer peripheral surface to form a water outlet hole leading to the water outlet groove.

[0009] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, an O-ring 1 which is sleeved on the sealing member is provided between the front end of the sealing sleeve and the sealing member.

[0010] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, the inner cavity at the rear end of the sealing sleeve is composed of a constant diameter cavity with equal inner diameter and an expanded diameter cavity with gradually increasing inner diameter from front to back.

[0011] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, the rear end of the rotating head extends into the inner cavity of the rotating shaft and is threadedly connected to the inner cavity of the rotating shaft. An O-ring 2 and an open retaining ring 1 are provided between the rotating head and the rotating shaft, and the O-ring 2 and the open retaining ring 1 are in conflict with each other.

[0012] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, a mounting groove is provided on the rotating head, and the second O-ring and the first open retaining ring are arranged in the mounting groove.

[0013] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, a locking nut is threadedly connected to the front end of the shell, the rotating head extends into the locking nut and is threadedly connected to the shell and the rotating shaft, an oil seal mounted on the rotating head is provided between the rotating head and the locking nut, a bearing mounted on the rotating head is provided between the rotating head and the shell, a bearing mounted on the rotating head and an oil seal are provided between the rear end of the rotating shaft and the shell, and the oil seal is in conflict with the annular assembly seat.

[0014] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, a damping ring is provided on the rotating shaft between bearing one and bearing two, a damping slit is formed between the damping ring and the inner wall of the outer shell, and an oil storage cavity filled with damping oil is formed between the inner wall of the outer shell and oil seal one and oil seal two.

[0015] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, the rotating shaft and the damping ring body are an integrated structure.

[0016] In the above-mentioned ultra-high pressure self-rotating cleaning nozzle, a spiral groove is provided on the outer peripheral surface of the damping ring body, the depth of the spiral groove gradually decreases from the rear end to the front end of the rotating shaft, and an oil hole is provided in the damping ring body along its axial direction.

[0017] The outstanding advantages of the present invention compared with the prior art are:

[0018] 1. A sealing sleeve is arranged in the outer shell on the front side of the connecting nut of the present invention, a sealing member sleeved on the rotating shaft is arranged between the front end of the sealing sleeve and the rotating shaft, a sealing seat is sleeved on the rotating shaft on the front side of the sealing sleeve, the front end face of the sealing seat is in conflict with the annular assembly seat, and the rear end face is in conflict with the front end face of the sealing sleeve, a tapered hole with a smaller inner diameter at the front and a larger inner diameter at the rear end of the sealing seat is arranged at the rear end, the front end of the sealing member is a tapered surface adapted to the tapered hole, the rear end of the sealing seat and the sealing member are in conflict with each other through the tapered hole and the tapered surface, the sealing effect is good, and there is no high processing and assembly requirements in the prior art, and the production cost is low;

[0019] 2. A water outlet groove is provided on the side wall of the housing of the present invention, and the sealing seat is inclined from the front end surface to the outer peripheral surface to provide a water outlet hole leading to the water outlet groove, which effectively avoids water accumulation and can remind the operator to replace the seal and the sealing seat. Description of the drawings:

[0020] Figure 1 is a cross-sectional view of the present invention;

[0021] Figure 2 It is an exploded view of the present invention.

[0022] Figure numerals: 1, rotating shaft; 2, rotating head; 3, housing; 4, connecting nut; 5, annular assembly seat; 6, sealing sleeve; 7, sealing element; 8, sealing seat; 9, water outlet groove; 10, water outlet hole; 11, O-ring one; 12, equal diameter cavity; 13, expanded diameter cavity; 14, O-ring two; 15, open retaining ring one; 16, mounting groove; 17, locking nut; 18, oil seal one; 19, bearing one; 20, bearing two; 21, oil seal two; 22, damping ring; 23, spiral groove; 24, oil through hole. Specific implementation method:

[0023] The present invention is further described below with reference to specific embodiments. Figure 1 —2:

[0024] A super-high pressure self-rotating cleaning nozzle comprises a hollow rotating shaft 1, a rotating head 2 connected to the front end of the rotating shaft 1, a shell 3 sleeved on the outer periphery of the rotating shaft 1, and a connecting nut 4 fixed to the rear end of the shell 3, wherein a pressure water channel is formed between the connecting nut 4, the rotating shaft 1 and the rotating head 2, an annular assembly seat 5 is provided in the shell 3 for dividing the inner cavity of the shell 3 into a front cavity and a rear cavity, the rotating shaft 1 passes through the annular assembly seat 5 and extends into the rear cavity, a sealing sleeve 6 is provided in the shell 3 on the front side of the connecting nut 4, a sealing member 7 sleeved on the rotating shaft 1 is provided between the front end of the sealing sleeve 6 and the rotating shaft 1, a sealing seat 8 is sleeved on the rotating shaft 1 on the front side of the sealing sleeve 6, the front end face of the sealing seat 8 conflicts with the annular assembly seat 5, and the rear end face conflicts with the front end face of the sealing sleeve 6, a tapered hole with a smaller inner diameter at the front and a larger inner diameter at the rear end of the sealing seat 8, the front end of the sealing member 7 is a tapered surface adapted to the tapered hole, and the rear end of the sealing seat 8 is sealed by the tapered hole and the tapered surface.

[0025] The working principle of the present invention is as follows: Figure 1 , 2 As shown, the connection nut 4 is connected to the high-pressure pipe, and the water is transported to the inner cavity of the rotating head 2 through the connection nut 4 and the rotating shaft 1, and is sprayed out from the spray hole of the rotating head 2. Since a sealing sleeve 6 is provided in the housing 3 on the front side of the connection nut 4, and a sealing member 7 sleeved on the rotating shaft 1 is provided between the front end of the sealing sleeve 6 and the rotating shaft 1, the rotating shaft 1 and the sealing member 7 are tightly matched and sealed, the sealing member 7 and the sealing sleeve 6 are tightly matched and sealed, and the sealing sleeve 6 and the housing 3 are tightly matched and sealed; a sealing seat 8 is sleeved on the rotating shaft 1 on the front side of the sealing sleeve 6, and the front end face of the sealing seat 8 is in conflict with the annular assembly seat 5, and the rear end face is in conflict with the front end face of the sealing sleeve 6, and the annular assembly seat 5 is used to seal the sealing seat 8. Axial limiting, the sealing seat 8 axially limits the sealing sleeve 6; the rear end of the sealing seat 8 is provided with a tapered hole with a smaller inner diameter at the front and a larger inner diameter at the back, the front end of the sealing member 7 is a tapered surface adapted to the tapered hole, the rear end of the sealing seat 8 and the sealing member 7 are sealed by the tapered hole and the tapered surface, the sealing seat 8 axially limits and seals the sealing member 7 by the tapered hole and the tapered surface, the water flowing out of the inner cavity of the connecting nut 4 can only flow to the rotating shaft 1 through the sealing sleeve 6, the present invention effectively seals the rotating shaft 1 and the housing 3, and does not have the high processing and assembly requirements in the prior art, and the production cost is low.

[0026] Furthermore, a water outlet groove 9 is provided on the side wall of the housing 3, and a water outlet hole 10 leading to the water outlet groove 9 is provided on the sealing seat 8 at an angle from the front end surface to the outer peripheral surface. When the seal 7 and the sealing seat 8 are worn due to the rotation of the rotating shaft 1, water flows out of the housing 3 through the water outlet hole 10 and the water outlet groove 9 to avoid water accumulation; at the same time, the operator can be reminded to replace the seal 7 and the sealing seat 8.

[0027] In order to better seal the sealing sleeve 6 and the sealing member 7, an O-ring 11 sleeved on the sealing member 7 is provided between the front end of the sealing sleeve 6 and the sealing member 7.

[0028] In order to compress the sealing sleeve 6 and increase the water pressure, the inner cavity at the rear end of the sealing sleeve 6 is composed of an equal diameter cavity 12 with an equal inner diameter and an expanded diameter cavity 13 with a gradually increasing inner diameter from front to back.

[0029] In order to adapt to ultra-high pressure cleaning, the rear end of the rotating head 2 extends into the inner cavity of the rotating shaft 1 and is threadedly connected with the inner cavity of the rotating shaft 1. An O-ring 2 14 and an open retaining ring 1 15 are provided between the rotating head 2 and the rotating shaft 1, and the O-ring 2 14 and the open retaining ring 1 15 are in conflict with each other. Compared with the prior art, which only uses the rotating head 2 to be threadedly connected with the rotating shaft 1, or only uses the O-ring to seal the rotating head 2 and the rotating shaft 1, when the pressure is too high, water leakage will occur at the connection between the rotating head 2 and the rotating shaft 1. The O-ring 2 14 of the present invention is used in combination with the open retaining ring 1 15, and the sealing effect is better, which can be suitable for ultra-high pressure cleaning.

[0030] The O-ring 2 14 and the opening retaining ring 1 15 are arranged at the following positions: Figure 1 , 2 As shown, the rotating head 2 is provided with a mounting groove 16 , and the O-ring 2 14 and the open retaining ring 15 are arranged in the mounting groove 16 .

[0031] The installation structure of the rotating shaft 1, the rotating head 2 and the outer shell 3: the front end of the outer shell 3 is threadedly connected with a locking nut 17, the rotating head 2 extends into the locking nut 17 and the outer shell 3 and is threadedly connected to the rotating shaft 1, an oil seal 18 sleeved on the rotating head 2 is provided between the rotating head 2 and the locking nut 17, a bearing 19 sleeved on the rotating head 2 is provided between the rotating head 2 and the outer shell 3, a bearing 20 sleeved on the rotating shaft 1 and an oil seal 21 are provided between the rear end of the rotating shaft 1 and the outer shell 3, and the oil seal 21 conflicts with the annular assembly seat 5.

[0032] Furthermore, a damping ring 22 is provided on the rotating shaft 1 between the bearing 1 19 and the bearing 2 20, a damping slit is formed between the damping ring 22 and the inner wall of the housing 3, and an oil storage cavity filled with damping oil is formed between the inner wall of the housing 3 and the oil seal 1 18 and the oil seal 2 21. The damping oil not only has the function of lubrication and cooling, but also can slow down the rotation speed of the rotating shaft 1. Different damping oils have different viscosities, and the rotation speed of the rotating shaft 1 is different. By setting different damping oils, the purpose of adjusting the rotation speed is achieved.

[0033] In order to reduce the number of assembly steps and to fix the damping ring body 22 on the rotating shaft 1 so as to rotate together with the rotating shaft 1 , the rotating shaft 1 and the damping ring body 22 are an integrated structure.

[0034] In order to allow the damping oil to flow from one end of the damping ring body 22 to the other end, a spiral groove 23 is provided on the outer circumferential surface of the damping ring body 22; in order to further prevent the radial shaking of the front end of the rotating shaft 1 and have a better buffering effect, the groove depth of the spiral groove 23 gradually decreases from the rear end to the front end of the rotating shaft 1; an oil hole 24 is provided in the damping ring body 22 along its axial direction. The damping oil flows from the rear end of the rotating shaft 1 to the front end of the rotating shaft 1 along the spiral groove 23 and the damping slit, and then flows back to the rear end of the rotating shaft 1 from the oil hole 24.

[0035] The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-high pressure self-rotating cleaning nozzle, comprising a hollow rotating shaft (1), a rotating head (2) connected to the front end of the rotating shaft (1), a housing (3) sleeved on the outer periphery of the rotating shaft (1), and a connecting nut (4) fixed to the rear end of the housing (3), wherein a pressure water channel is formed between the connecting nut (4), the rotating shaft (1) and the rotating head (2), and characterized in that: The housing (3) is provided with an annular assembly seat (5) for dividing the inner cavity of the housing (3) into a front cavity and a rear cavity. The rotating shaft (1) passes through the annular assembly seat (5) and extends into the rear cavity. A sealing sleeve (6) is provided in the housing (3) on the front side of the connecting nut (4). A sealing member (7) sleeved on the rotating shaft (1) is provided between the front end of the sealing sleeve (6) and the rotating shaft (1). A sealing seat (8) is sleeved on the rotating shaft (1) on the front side of the sealing sleeve (6). The front end surface of the sealing seat (8) is The rear end face of the sealing sleeve (6) contacts with the annular assembly seat (5), and the rear end face contacts with the front end face of the sealing sleeve (6); the rear end of the sealing seat (8) is provided with a tapered hole with a smaller inner diameter at the front and a larger inner diameter at the rear; the front end of the sealing member (7) is a tapered surface adapted to the tapered hole; the rear end of the sealing seat (8) and the sealing member (7) are sealed by contacting with the tapered hole and the tapered surface; the front end of the housing (3) is threadedly connected with a locking nut (17); the rotating head (2) extends into the locking nut (17) and the housing (3) is threadedly connected with the rotating shaft (1); the rotating head (2) is threadedly connected to the locking nut (17) and the housing (3) and the rotating shaft (1); An oil seal (18) mounted on the rotating head (2) is provided between the rotating head (2) and the locking nut (17); a bearing (19) mounted on the rotating head (2) is provided between the rotating head (2) and the housing (3); a bearing (20) and an oil seal (21) mounted on the rotating shaft (1) are provided between the rear end of the rotating shaft (1) and the housing (3); the oil seal (21) is in conflict with the annular assembly seat (5); the rotating shaft between the bearing (19) and the bearing (20) is (1) is provided with a damping ring body (22), a damping slit is formed between the damping ring body (22) and the inner wall of the housing (3), an oil storage cavity filled with damping oil is formed between the inner wall of the housing (3) and the oil seal 1 (18) and the oil seal 2 (21), a spiral groove (23) is provided on the outer peripheral surface of the damping ring body (22), the groove depth of the spiral groove (23) gradually decreases from the rear end to the front end of the rotating shaft (1), and an oil through hole (24) is provided in the damping ring body (22) along its axial direction.

2. The ultra-high pressure self-rotating cleaning nozzle according to claim 1, characterized in that: A water outlet groove (9) is provided on the side wall of the housing (3), and a water outlet hole (10) leading to the water outlet groove (9) is provided on the sealing seat (8) at an angle from the front end surface toward the outer peripheral surface.

3. The ultra-high pressure self-rotating cleaning nozzle according to claim 1, characterized in that: An O-ring (11) sleeved on the sealing member (7) is provided between the front end of the sealing sleeve (6) and the sealing member (7).

4. The ultra-high pressure self-rotating cleaning nozzle according to claim 1, characterized in that: The rear end inner cavity of the sealing sleeve (6) is composed of, from front to back, an equal diameter cavity (12) with an equal inner diameter and an expanded diameter cavity (13) with a gradually increasing inner diameter.

5. The ultra-high pressure self-rotating cleaning nozzle according to claim 1, characterized in that: The rear end of the rotating head (2) extends into the inner cavity of the rotating shaft (1) and is threadedly connected to the inner cavity of the rotating shaft (1); an O-ring 2 (14) and an open retaining ring 1 (15) sleeved on the rotating head (2) are provided between the rotating head (2) and the rotating shaft (1); the O-ring 2 (14) and the open retaining ring 1 (15) are in contact with each other.

6. The ultra-high pressure self-rotating cleaning nozzle according to claim 5, characterized in that: The rotating head (2) is provided with a mounting groove (16), and the second O-ring (14) and the first open retaining ring (15) are arranged in the mounting groove (16).

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