Large rotary joint

Abstract

A large rotary joint comprises a positioning sleeve and a hollow mandrel rotationally arranged in the positioning sleeve, more than two annular cavities are machined in the connecting position of the inner wall face of the positioning sleeve and the outer circumferential face of the hollow mandrel, the annular cavities are evenly arranged in the length direction of the positioning sleeve, and sealing structures are symmetrically arranged on the two sides of the annular cavities. The two adjacent annular cavities share the sealing structure, output pipelines are installed on the outer circumferential face of the positioning sleeve in the radial direction and correspond to the annular cavities, the output pipelines are communicated with the annular cavities, the right portion of the hollow mandrel extends out of the positioning sleeve, input pipelines are installed on the circumferential face in the radial direction, and the number of the input pipelines is matched with that of the annular cavities. The input pipelines are evenly distributed in the circumferential direction of the hollow mandrel and communicate with the annular cavity through transmission pipelines. The rotary joint is compact in structure and reasonable in layout, is provided with a plurality of mutually independent transmission channels, and is high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a large -scale swivel joint. BACKGROUND

[0002] The swivel joint is also called as the rotation, and is used for conveying gas, liquid, oil and various media in compact design structure in pipeline connecting device, and the connected pipeline can rotate relatively. The existing multi-channel swivel joint does not have the device of multi-channel, and most of the swivel joints are provided with only one channel outlet, so that when the high-pressure medium flows, the different working requirements cannot be selected, the flow is single, and the working efficiency is reduced. CONTENT OF THE UTILITY MODEL

[0003] In view of the above-mentioned problems, the utility model provides a large -scale swivel joint.

[0004] In order to achieve the above object, the utility model provides a large -scale swivel joint, including the positioning sleeve, the hollow core shaft that rotates in the positioning sleeve, the annular cavity is processed in the connecting place of the positioning sleeve inner wall surface and the hollow core shaft outer peripheral surface, the annular cavity is equipped with more than two, the annular cavity is evenly arranged along the length direction of the positioning sleeve, the sealing structure is symmetrically equipped with on both sides of the annular cavity, the sealing structure is shared between the adjacent two annular cavities, the output pipeline is installed on the outer circumferential surface of the positioning sleeve and corresponds to the annular cavity in the radial direction, the output pipeline is connected with the annular cavity, the input pipeline is installed on the circumferential surface of the hollow core shaft right part and extends out of the positioning sleeve, the number of input pipelines matches the annular cavity, the input pipeline is evenly distributed along the circumferential direction of the hollow core shaft, and the input pipeline is connected with the annular cavity through the transmission pipeline.

[0005] As a further improvement of the utility model, the first through hole is processed on the inner wall of the hollow core shaft and the corresponding position of the annular cavity, the second through hole is processed on the inner wall of the hollow core shaft and the joint of the input pipeline, one end of the transmission pipeline is connected with the first through hole, and the other end of the transmission pipeline is connected with the second through hole.

[0006] As a further improvement of the utility model, the sealing structure includes the annular sealing groove processed on the inner wall of the positioning sleeve, the sealing ring is installed in the annular sealing groove, the annular sealing groove is arranged in pairs, the gas hole is processed on the inner wall of the positioning sleeve and penetrates to the outer wall surface of the positioning sleeve between the two annular sealing grooves, the inner diameter of one end of the gas hole close to the outer peripheral surface of the positioning sleeve is increased and the positioning shaft sleeve is screw-mounted, and the oil nozzle is installed in the positioning shaft sleeve.

[0007] As a further improvement of the utility model, the cross section shape of the sealing ring is star-shaped.

[0008] As a further improvement of the utility model, the transmission pipelines are arranged along the axial direction of the hollow shaft and are centrally symmetrically distributed.

[0009] The utility model discloses the beneficial effects of:

[0010] 1、 the rotary joint is evenly arranged annular cavity at the connecting place of positioning sleeve and hollow shaft, and the outer wall surface of positioning sleeve is installed output pipeline and is communicated with corresponding annular cavity, and the outer periphery of hollow shaft that extends positioning sleeve is correspondingly provided with input pipeline, and the input pipeline is communicated with corresponding annular cavity through output pipeline, and the whole structure is compact, and the layout is reasonable, forms multiple independent transmission channels, and the practicality is strong.

[0011] 2、 the both sides of annular cavity are equipped with sealing structure, and the sealing structure includes two groups of annular sealing grooves with sealing ring, and the air hole is processed between two annular sealing grooves and installs positioning sleeve and oil nozzle, after the assembly of sleeve and hollow shaft, the gas between two sealing rings can be discharged through the air hole, and the grease can also be injected to the sealing ring through the oil nozzle, to prolong the service life of sealing ring, when the sealing ring is damaged, the liquid in annular cavity will flow out along the oil nozzle of corresponding position, so as to judge whether the sealing strip is damaged, thereby timely replacement is carried out. DRAWINGS

[0012] Figure 1 It is a sectional view of a large rotary joint of the utility model;

[0013] Figure 2 It is Figure 1 It is an enlarged view of A in the middle;

[0014] Figure 3 It is a side view of a large rotary joint of the utility model.

[0015] In the drawing: 1, positioning sleeve; 11, annular cavity; 12, annular sealing groove; 13, sealing ring; 14, air hole; 15, positioning sleeve; 16, oil nozzle; 2, hollow shaft; 21, first through hole; 22, second passage; 3, output pipeline; 4, transmission pipeline; 5, input pipeline. PREFERRED EMBODIMENT

[0016] As Figures 1-3The utility model discloses a large -scale rotary joint, including positioning sleeve 1, hollow core shaft 2 that rotates in positioning sleeve 1, the annular cavity 11 of processing ring -shaped cavity 11 is connected at the outer peripheral surface of hollow core shaft 2 and the inner wall of positioning sleeve 1, the annular cavity 11 is equipped with more than two, the annular cavity 11 is evenly arranged along the length direction of positioning sleeve 1, the annular cavity 11 both sides symmetry is equipped with sealing structure, and the sealing structure is shared between the adjacent two annular cavities 11, and the output pipeline 3 is installed on the outer circumference of positioning sleeve 1 and corresponds with the annular cavity 11 in radial direction, and the output pipeline 3 is connected with the annular cavity 11, and the hollow core shaft 2 right part stretches out positioning sleeve 1 and is installed on the outer peripheral surface in radial direction and inputs the pipeline 5, and the number of input pipeline 5 is matched with the annular cavity 11, and the input pipeline 5 is evenly distributed along the circumferential direction of hollow core shaft 2, and the input pipeline 5 is connected with the annular cavity 11 through transmission pipeline 4, and the first through -hole 21 is processed on the inner wall of hollow core shaft 2 and the corresponding position of annular cavity 11, and the second through -hole 22 is processed on the inner wall of hollow core shaft 2 and the joint of input pipeline 5, and one end of transmission pipeline 4 is connected with the first through -hole 21, and the other end of transmission pipeline 4 is connected with the second through -hole 22, and transmission pipeline 4 is arranged along the axial direction of hollow core shaft 2, and a plurality of transmission pipeline 4 is centrally symmetric distribution, and the hollow core shaft 2 right end is equipped with flange connector;

[0017] The sealing structure includes an annular sealing groove 12 processed on the inner wall of the positioning sleeve 1, a sealing ring 13 is installed in the annular sealing groove 12, the cross-sectional shape of the sealing ring 13 is star-shaped, the annular sealing grooves 12 are arranged in pairs, a gas hole 14 is radially processed on the inner wall of the positioning sleeve 1 between the two annular sealing grooves 12 and penetrates to the outer wall surface of the positioning sleeve 1, the inner diameter of one end of the gas hole 14 close to the outer peripheral surface of the positioning sleeve 1 is increased and a positioning shaft sleeve 15 is threadedly installed, and an oil nozzle 16 is installed in the positioning shaft sleeve 15.

[0018] The rotary joint uniformly arranges annular cavities at the connecting position of the positioning sleeve and the hollow core shaft, the output pipeline is installed on the outer wall surface of the positioning sleeve to communicate with the corresponding annular cavities, the input pipeline is correspondingly arranged on the outer peripheral surface of the hollow core shaft that stretches out of the positioning sleeve, the input pipeline is connected with the corresponding annular cavities through the output pipeline, the overall structure is compact, the layout is reasonable, a plurality of independent transmission channels are formed, and the utility is strong. The annular cavities are provided with sealing structures on both sides, the sealing structure includes two annular sealing grooves with sealing rings, a gas hole is processed between the two annular sealing grooves and a positioning shaft sleeve and an oil nozzle are installed, after the assembly of the sleeve and the hollow core shaft is completed, the gas between the two sealing rings can be discharged through the gas hole, and the lubricating grease can also be injected into the sealing ring through the oil nozzle to prolong the service life of the sealing ring; when the sealing ring is damaged, the liquid in the annular cavity will flow out through the oil nozzle at the corresponding position to determine whether the sealing strip is damaged, so that timely replacement can be performed.

[0019] In specific use, the utility model is described in combination with the drawings for the convenience of understanding the utility model.

[0020] In operation, the output pipes outside the positioning sleeve are connected with the hydraulic pipes one by one, the hollow core shaft is connected to the rotating mechanism through the flange connector at the right end, the input pipes on the hollow core shaft are connected with the corresponding pipes on the rotating mechanism, and the liquid in the rotating mechanism is sequentially delivered into the hydraulic pipes through the input pipes, the annular cavity, the transmission pipes and the output pipes.

[0021] The preferred embodiments of the present application have been described above, but the present application is not limited to the above-mentioned embodiments, and various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A large rotary joint, characterized in that: The system includes a positioning sleeve (1) and a hollow mandrel (2) rotatably disposed within the positioning sleeve (1). An annular cavity (11) is machined at the connection between the inner wall of the positioning sleeve (1) and the outer circumferential surface of the hollow mandrel (2). Two or more annular cavities (11) are provided, evenly distributed along the length of the positioning sleeve (1). A sealing structure is symmetrically provided on both sides of each annular cavity (11), and adjacent annular cavities (11) share the same sealing structure. The outer circumferential surface of the positioning sleeve (1)... The output pipe (3) is installed radially to correspond to the annular cavity (11). The output pipe (3) is connected to the annular cavity (11). The right side of the hollow mandrel (2) extends out of the positioning sleeve (1) and the input pipe (5) is installed radially on the circumferential surface. The number of input pipes (5) matches the number of annular cavities (11). The input pipes (5) are evenly distributed along the circumferential direction of the hollow mandrel (2). The input pipes (5) are connected to the annular cavity (11) through the transmission pipe (4).

2. A large rotary joint according to claim 1, characterized in that: A first through hole (21) is machined on the inner wall of the hollow mandrel (2) at a position corresponding to the annular cavity (11). A second through hole (22) is machined on the inner wall of the hollow mandrel (2) at the junction with the input pipe (5). One end of the transmission pipe (4) is connected to the first through hole (21), and the other end of the transmission pipe (4) is connected to the second through hole (22).

3. A large rotary joint according to claim 1, characterized in that: The sealing structure includes an annular sealing groove (12) machined on the inner wall of the positioning sleeve (1), a sealing ring (13) is installed in the annular sealing groove (12), the annular sealing grooves (12) are arranged in pairs, and a radially machined air hole (14) is formed between the two annular sealing grooves (12) and on the inner wall of the positioning sleeve (1) extends to the outer wall of the positioning sleeve (1). The inner diameter of the air hole (14) near the outer circumferential surface of the positioning sleeve (1) is increased and a positioning bushing (15) is threadedly installed. An oil nozzle (16) is installed in the positioning bushing (15).

4. A large rotary joint according to claim 3, characterized in that: The sealing ring (13) has a star-shaped cross-section.

5. A large rotary joint according to claim 1, characterized in that: The transmission pipe (4) is arranged along the axial direction of the hollow mandrel (2), and the plurality of transmission pipes (4) are centrally symmetrically distributed.

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