High-low pressure two-way rotary joint device

Abstract

The application discloses a high-low pressure two-way rotary joint device, which comprises a middle shaft, a lower flange seat and an upper flange plate. A sealing group is arranged between the upper flange plate and the middle shaft to provide sealing for a high-pressure passage therebetween. The sealing group comprises an open O-shaped ring, a conical bottom V-shaped sealing ring and a flat bottom V-shaped sealing ring arranged in sequence. Part of the open O-shaped ring is arranged in a V-shaped notch of the conical bottom V-shaped sealing ring. The flat bottom V-shaped sealing ring comprises a V-shaped groove arranged on an end face thereof, and part of the conical bottom V-shaped sealing ring is arranged in the V-shaped groove. The middle shaft is arranged to rotate with the upper flange plate, and the sealing group is combined by the open O-shaped ring, the conical bottom V-shaped sealing ring and the flat bottom V-shaped sealing ring. The structure has small rotary resistance, and the sealing effect is better with the increase of pressure. The sealing device has high strength and wear resistance, and the service life can be greatly improved.

Description

Technical Field

[0001] This invention relates to rotary joint devices, and more particularly to a high- and low-pressure dual-channel rotary joint device. Background Technology

[0002] The high- and low-pressure dual-channel rotary joint is a crucial component of waterjet equipment, designed to allow for relative rotation of water in both high- and low-pressure channels during transport. In existing waterjet applications, dual-channel rotary joints utilize an intermediate rotating body and ultra-high-pressure engineering rubber-plastic seals. However, due to the relatively low strength of these seals, their service life is slow under ultra-high-pressure conditions (pressures exceeding 250 MPa), necessitating frequent shutdowns for seal replacement or maintenance.

[0003] Based on the above problems, it is necessary to improve the existing technology. Summary of the Invention

[0004] I. Technical problems to be solved

[0005] The present invention addresses the aforementioned deficiencies in the prior art by proposing a high- and low-pressure dual-channel rotary joint device to solve the problems mentioned in the background art.

[0006] II. Technical Solution

[0007] To solve the above-mentioned technical problems, the present invention provides a high- and low-pressure dual-channel rotary joint device, comprising:

[0008] An intermediate shaft is provided with a first high-pressure passage and a first low-pressure passage.

[0009] The lower flange seat is fixedly connected to the intermediate shaft, and a second high-pressure passage and a second low-pressure passage are provided on the lower flange seat, which are connected to the first high-pressure passage and the first low-pressure passage.

[0010] The upper flange is located above the intermediate shaft and has a third high-pressure passage connected to the first high-pressure passage. The upper flange can rotate along the intermediate shaft, and the third high-pressure passage and the first high-pressure passage remain connected at any rotation angle of the upper flange. A sealing assembly is provided between the upper flange and the intermediate shaft to provide a seal for the first high-pressure passage and the third high-pressure passage.

[0011] The sealing assembly includes an open O-ring, a conical bottom V-ring, and a flat bottom V-ring arranged in sequence. The open O-ring is partially disposed within the V-groove of the conical bottom V-ring, with its open end facing the same direction as the V-groove. The flat bottom V-ring includes a V-groove on its end face, and a portion of the conical bottom V-ring is located within this V-groove.

[0012] The upper flange includes a first positioning boss protruding from the middle of its inner wall, and sealing baffles are provided on the upper and lower sides of the first positioning boss.

[0013] A second positioning boss is provided in the middle of the first positioning boss, and the sealing assembly is positioned on the upper and lower sides of the second positioning boss.

[0014] The intermediate shaft is fixed to the lower flange seat by bolts, and the first and second high-pressure passages are sealed by a tapered sleeve seal and a metal O-ring installed between the lower flange seat and the intermediate shaft.

[0015] The open O-ring, conical bottom V-ring, and flat bottom V-ring are made of metal.

[0016] III. Beneficial Effects

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: The high and low pressure dual-channel rotary joint device of this invention sets the rotation of the intermediate shaft to the rotation of the upper flange, and cooperates with a sealing group composed of an open O-ring, a conical bottom V-ring, and a flat bottom V-ring. This structure has low rotational resistance, and the sealing effect of the sealing element increases with pressure. It also has high strength and wear resistance, which can greatly improve the service life. Attached Figure Description

[0018] Figure 1 This is a top view of the structure of the present invention.

[0019] Figure 2 For the present invention along Figure 1 A schematic diagram of the cross-sectional structure along the AA direction.

[0020] Figure 3 For the present invention along Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction.

[0021] Figure 4 For the present invention Figure 3 A magnified view of a portion of point A in the middle. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0023] Please see Figure 1-4 The present invention provides an embodiment of a high- and low-pressure dual-channel rotary joint device, comprising an intermediate shaft 1, a flange seat 2, an upper flange 3, and a lower flange seat 2. A first high-pressure channel 100 and a first low-pressure channel 101 are provided on the intermediate shaft 1.

[0024] The lower flange seat 2 is fixedly connected to the intermediate shaft 1. A second high pressure passage 200 and a second low pressure passage 201 are provided on the lower flange seat 2, which are connected to the first high pressure passage 100 and the first low pressure passage 101.

[0025] The upper flange 3 is positioned above the intermediate shaft 1 and has a third high-pressure passage 300 connected to the first high-pressure passage 100. The upper flange 3 can rotate along the intermediate shaft 1, and the third high-pressure passage 300 and the first high-pressure passage 100 remain connected at any rotation angle of the upper flange 3. A sealing assembly 4 is provided between the upper flange 3 and the intermediate shaft 1 to provide a seal for the first high-pressure passage 100 and the third high-pressure passage 300.

[0026] The sealing assembly 4 includes an open O-ring 40, a conical bottom V-shaped sealing ring 41, and a flat bottom V-shaped sealing ring 42 arranged sequentially. The open O-ring 40 is partially disposed within the V-groove 41a of the conical bottom V-shaped sealing ring 41, with its open end 40a facing the same direction as the V-groove 41a. The flat bottom V-shaped sealing ring 42 includes a V-groove 42a disposed on its end face, and a portion of the conical bottom V-shaped sealing ring 41 is located within the V-groove 42a.

[0027] The above-mentioned structure of the present invention firstly changes the rotation of the intermediate shaft of the original high and low pressure two-way rotary joint device to the rotation of the upper flange, and cooperates with a sealing group composed of an open O-ring, a conical bottom V-ring, and a flat bottom V-ring. This structure has low rotational resistance, and the sealing effect of the sealing element increases with pressure. It also has high strength and wear resistance, which can greatly improve the service life.

[0028] Specifically, during operation, the open O-ring 40 is first subjected to hydraulic pressure, which causes it to deform and increase the sealing effect. At the same time, it also compresses the flat-bottomed V-shaped sealing ring, causing the sealing lip of the flat-bottomed V-shaped sealing ring to fit tightly against the intermediate shaft, producing a sealing effect. The greater the pressure, the better the sealing effect.

[0029] When the conical bottom V-shaped sealing ring seals, it simultaneously compresses and seals the flat bottom V-shaped sealing ring below, achieving a double sealing effect and increasing sealing reliability.

[0030] The upper flange 3 includes a first positioning boss 30 protruding from the middle of its inner wall, sealing baffles 5 provided on the upper and lower sides of the first positioning boss 30, and a second positioning boss 31 protruding from the middle of the first positioning boss 30. The sealing assembly 4 is positioned on the upper and lower sides of the second positioning boss 31. The sealing baffles 5 provided on both sides of the first positioning boss provide installation and fixation for the sealing assembly located in the upper flange.

[0031] The intermediate shaft 1 is fixed to the lower flange seat 2 by bolts 6, and the first and second high-pressure passages are sealed by tapered sleeve sealing ring 6 and metal O-ring 7 set between the lower flange seat 2 and the intermediate shaft 1.

[0032] Furthermore, in order to improve the wear resistance of each sealing ring in the sealing assembly, the open O-ring 40, the conical bottom V-ring 41, and the flat bottom V-ring 42 are made of metal.

[0033] When using the high and low pressure dual-channel rotary joint device of the present invention, the lower flange seat 2 is fixed to the outside of the equipment by a fixing device, the upper flange 3 is installed on the rotating disk of the equipment, and the low pressure channel on the intermediate body 3 extends into the corresponding part on the rotating disk of the equipment, and is sealed by a low pressure rotary sealing ring, allowing low pressure fluid to enter the equipment for operation. The specific principle and usage method of the rotary joint are not elaborated in this embodiment.

[0034] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high- and low-pressure dual-channel rotary joint device, characterized in that, include: Intermediate shaft (1), on which a first high-pressure passage (100) and a first low-pressure passage (101) are provided. The lower flange seat (2) is fixedly connected to the intermediate shaft (1). A second high pressure passage (200) and a second low pressure passage (201) are provided on the lower flange seat (2) to communicate with the first high pressure passage (100) and the first low pressure passage (101). The upper flange (3) is located above the intermediate shaft (1) and has a third high pressure passage (300) connected to the first high pressure passage (100). The upper flange (3) can rotate along the intermediate shaft (1) and the third high pressure passage (300) and the first high pressure passage (100) remain connected at any rotation angle of the upper flange (3). A sealing assembly (4) is provided between the upper flange (3) and the intermediate shaft (1) to provide a seal for the first high pressure passage (100) and the third high pressure passage (300). The sealing assembly (4) includes an open O-ring (40), a conical bottom V-shaped sealing ring (41), and a flat bottom V-shaped sealing ring (42) arranged in sequence. The open O-ring (40) is partially disposed in the V-groove (41a) of the conical bottom V-shaped sealing ring (41), with its open end (40a) facing the same direction as the V-groove (41a). The flat bottom V-shaped sealing ring (42) includes a V-groove (42a) disposed on its end face, and a portion of the conical bottom V-shaped sealing ring (41) is located in the V-groove (42a).

2. The high and low pressure dual-channel rotary joint device as described in claim 1, characterized in that: The upper flange (3) includes a first positioning boss (30) protruding in the middle of its inner wall, and sealing baffles (5) are provided on the upper and lower sides of the first positioning boss (30).

3. The high and low pressure dual-channel rotary joint device as described in claim 1, characterized in that: A second positioning boss (31) is provided in the middle of the first positioning boss (30), and the sealing assembly (4) is positioned on the upper and lower sides of the second positioning boss (31).

4. The high and low pressure dual-channel rotary joint device as described in claim 1, characterized in that: The intermediate shaft (1) is fixed to the lower flange seat (2) by bolts. The first and second high-pressure passages are sealed by the tapered sleeve seal ring (6) and the metal O-ring (7) set between the lower flange seat (2) and the intermediate shaft (1).

5. The high and low pressure dual-channel rotary joint device as described in claim 1, characterized in that: The open O-ring (40), the conical bottom V-ring (41), and the flat bottom V-ring (42) are made of metal.

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