A rotary joint for simultaneously rotating and transmitting ultra-high pressure water and abrasive

Abstract

A rotary joint for simultaneously rotating and transmitting ultra-high pressure water and abrasives, characterized in that it includes a mounting seat, a shell, a rotating shaft and a connecting plate, wherein the mounting seat is provided with a plurality of radial high pressure water inlet interfaces and abrasive inlets; the connecting plate is provided with a plurality of high pressure water outlet interfaces; an abrasive channel is provided at the center of the rotating shaft; a plurality of axial water guide holes are provided on the rotating shaft, one end of the water guide hole is connected to the high pressure water outlet hole on the connecting plate, and the other end is connected to the high pressure water inlet hole of the mounting seat; the rotating shaft is positioned in the shell through the bearing installation and the axial positioning of the rotating shaft is achieved through the boss on the rotating shaft and the support pad near one end of the mounting seat, and the shell is installed on the mounting seat. The present invention adopts a structure in which an abrasive channel is provided in the center of the rotating shaft and water guide holes are provided around the abrasive channel to achieve simultaneous rotating transmission of high pressure water and abrasives, and has the characteristics of small size, simple structure, high reliability, etc., and has obvious functions and effects on improving the working efficiency of water jet equipment.

Description

Technical Field

[0001] The invention relates to a water cutting technology, in particular to a water cutting joint, specifically a rotary joint for simultaneously rotating and transmitting ultra-high pressure water and abrasive. Background Art

[0002] The ultra-high pressure rotary joint is an important component of water jet equipment. Its function is to meet the need for relative rotation between the output end and the input end in the high-pressure water transmission. In the field of water jet applications, the existing rotary joint can only be used to transmit ultra-high pressure water. With the development of ultra-high pressure water jet equipment technology, its application field has been continuously expanded. In some specific engineering applications (such as mining, rock breaking, stone mining, etc.), the impact kinetic energy of ultra-high pressure water jets is used to quickly cut and crush rocks. At the same time, the impact kinetic energy of the jet can be further increased by mixing abrasives, thereby improving the efficiency of water jets in cutting and crushing rocks. In such engineering applications, new requirements are put forward for ultra-high pressure rotary joints, requiring them to have abrasive supply functions while transmitting ultra-high pressure water. Summary of the invention

[0003] The purpose of the present invention is to design a rotary joint with the function of simultaneously rotating and transmitting ultra-high pressure water and abrasive, in order to solve the problem that the existing ultra-high pressure rotary joint can only transmit high-pressure water but has no abrasive supply and cannot meet the demand for simultaneous rotating transmission of high-pressure water and abrasive.

[0004] The technical solution of the present invention is:

[0005] A rotary joint for simultaneously rotating and transmitting ultrahigh pressure water and abrasive, characterized in that it comprises a mounting seat 9, a housing 4, a rotating shaft 6 and a connecting plate 2, wherein the mounting seat 9 is provided with a plurality of radial high pressure water inlet interfaces 13 in the circumferential direction, and the mounting seat 9 is provided with an abrasive inlet 14 in the axial direction; the connecting plate 2 is provided with a plurality of high pressure water outlet interfaces 15, and the connecting plate 2 is fixed on the rotating shaft 6 through a fixing ring 1 and a circular nut 3 and rotates synchronously therewith; an abrasive channel 16 is provided at the center of the rotating shaft 6, and the abrasive channel 16 is connected to the abrasive inlet 14 on the mounting seat 9; a plurality of axial A water guide hole 17, an annular groove 18 is provided at each end of the water guide hole 17, the annular groove (18) penetrates the water guide hole (17) through radial holes at both ends of the rotating shaft, the annular groove 18 at one end is connected to a high-pressure water outlet hole 19 on the connecting plate 2, the high-pressure water outlet hole 19 is connected to a high-pressure water outlet interface 15, and the annular groove 18 at the other end is connected to a high-pressure water inlet hole 20 of the mounting seat 9; the rotating shaft 6 is installed and positioned in the housing 4 through the thrust bearing 5 and the angular contact bearing 7, and the axial positioning of the rotating shaft is achieved through the boss on the rotating shaft 6 and the support pad 8 close to one end of the mounting seat, and the housing 4 is installed on the mounting seat 9.

[0006] The multiple high-pressure water inlet interfaces 13 on the mounting seat 9 are symmetrically mounted on the mounting seat 9 to ensure force balance, and the high-pressure water inlet interfaces 13 are connected to the high-pressure water input connector through threads.

[0007] The multiple high-pressure water outlet interfaces 15 on the connecting plate 2 are symmetrically distributed on the connecting plate 2, and the high-pressure water outlet interfaces 15 are connected to the high-pressure water output connector through threads.

[0008] A high-pressure sealing ring 10 is respectively mounted on both sides of the annular groove 18 on one end of the rotating shaft 6 close to the mounting seat 9.

[0009] The water guide hole 17 is a blind hole structure, and a sealing steel ball 11 is installed on the open end thereof. The sealing steel ball 11 is fixed by a set screw 12 on the end surface of the rotating shaft.

[0010] Beneficial effects of the present invention:

[0011] The present invention adopts a structure in which an abrasive channel is arranged at the center of the rotating shaft and a water guide hole is arranged around the abrasive channel, so as to realize simultaneous rotation transmission of ultra-high pressure water and abrasive. The maximum pressure of the rotary joint reaches 300MPa, and it has the characteristics of small size, simple structure, high reliability, etc., which meets the needs of simultaneous transmission of high pressure water and abrasive in ultra-high pressure water jet equipment. It has obvious function and effect on improving the working efficiency of water jet equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] like Figure 1 shown.

[0015] A rotary joint for simultaneously rotating and transmitting ultra-high pressure water and abrasives, comprising a mounting seat 9, a housing 4, a rotating shaft 6 and a connecting plate 2, wherein the mounting seat 9 is provided with a plurality of radial high pressure water inlet interfaces 13 in the circumferential direction, and the plurality of high pressure water inlet interfaces 13 are symmetrically mounted on the mounting seat 9 to ensure force balance, and the plurality of high pressure water inlet interfaces 13 are connected to the high pressure water input connector via threads. The mounting seat 9 is provided with an abrasive inlet 14 in the axial direction; the connecting plate 2 is provided with a plurality of high pressure water outlet interfaces 15, and the plurality of high pressure water outlet interfaces 15 are symmetrically distributed on the connecting plate 2, and the plurality of high pressure water outlet interfaces 15 are connected to the high pressure water output connector via threads. The connecting plate 2 is fixed on the rotating shaft 6 by the fixing ring 1 and the circular nut 3 and rotates synchronously therewith; an abrasive channel 16 is provided at the center of the rotating shaft 6, and the abrasive channel 16 is connected to the abrasive inlet 14 on the mounting seat 9; a plurality of axial water guide holes 17 are provided on the rotating shaft 4 outside the abrasive channel 16, and the water guide hole 17 is a blind hole structure, and a sealing steel ball 11 is installed on its open end, and the sealing steel ball 11 is fixed by a set screw 12 on the end face of the rotating shaft. An annular groove 18 is provided at each end of the water guide hole 17, and the annular groove 18 is connected to the water guide hole 17 through the radial holes at both ends of the rotating shaft. The annular groove 18 at one end is connected to the high-pressure water outlet hole 19 on the connecting plate 2, and the high-pressure water outlet hole 19 is connected to the high-pressure water outlet interface 15. The annular groove 18 at the other end is connected to the high-pressure water inlet hole 20 of the mounting seat 9. A high-pressure sealing ring 10 is respectively provided on both sides of the annular groove 18 on one end of the rotating shaft 6 close to the mounting seat 9; the rotating shaft 6 is installed and positioned in the housing 4 through the thrust bearing 5 and the angular contact bearing 7, and the axial positioning of the rotating shaft is realized through the boss on the rotating shaft 6 and the support pad 8 close to one end of the mounting seat, and the housing 4 is installed on the mounting seat 9.

[0016] Details are as follows:

[0017] The rotary joint for simultaneously rotating and transmitting ultrahigh pressure water and abrasive of the present invention mainly consists of a fixing ring 1, a connecting plate 2, a circular nut 3, a housing 4, a thrust bearing 5, a rotating shaft 6, an angular contact bearing 7, a support pad 8, a mounting seat 9, a high pressure sealing ring 10, a sealing steel ball 11 and a set screw 12. The mounting seat 9 is the input end of multiple high pressure water and abrasives. A plurality of internal threaded holes are distributed on the circumference of its large outer circle for installing the high pressure water input pipeline joint. The external thread on the right end is used for installing the abrasive input pipeline joint. The mounting seat 9 is fixedly mounted on the housing 4 by screws (not shown in the figure). The left end of the rotating shaft 6 is an external thread for installing the abrasive output pipeline joint. The center of the rotating shaft 6 is a cylindrical through hole. A plurality of axial cylindrical holes (water guide holes) with smaller diameters are distributed around the cylindrical through hole. These cylindrical holes are connected to the radial cylindrical holes distributed on the outer circles on the left and right sides of the rotating shaft 6. The thrust bearing 5 and the angular contact bearing 7 It is sleeved on the outer circle of the rotating shaft 6; the thrust bearing 5 and the angular contact bearing 7 are installed in the inner hole of the housing 4; the connecting plate 2 is the output end of multiple high-pressure water, and a plurality of internal threaded holes are also distributed on the circumference of its outer circle for installing the high-pressure water output pipe joint; the inner hole of the connecting plate 2 is sleeved on the outer circle on the left side of the rotating shaft 6, the circular nut on the right side of the connecting plate 2 is screwed on the external thread of the rotating shaft 6, the left end of the fixing ring 1 on the left side of the connecting plate is a square hole, which is sleeved on the step on the left side of the rotating shaft 6 which is also a square, the fixing ring 1 and the connecting plate 2 are fixedly connected with the circular nut 3 by a plurality of screws (not shown in the figure). The inner hole of the high-pressure sealing ring 10 is sleeved on the outer circle of the right end of the rotating shaft 6, located on the left and right sides of the radial hole on the right side of the rotating shaft 6, and the outer circle is sleeved in the inner hole of the left end of the mounting seat 9. The left end of the left high-pressure sealing ring 10 is against the support pad 8, and the right end of the right high-pressure sealing ring 10 is against the inner hole of the mounting seat 9; the support pad 8 is installed in the inner hole of the right end of the housing 4, and the left end is against the angular contact bearing 7. The steel ball 11 is installed on the right side of the water guide hole of the rotating shaft 6 and is fixed by the set screw 12. The function of the steel ball 11 and the set screw 12 is to separate the water guide hole of the rotating shaft 6 from the right end surface.

[0018] High-pressure water enters the hole connected to the internal threaded hole of the mounting seat 9 through the input pipeline, then enters the water guide hole of the rotating shaft 6, enters the hole of the connecting plate 2 fixedly connected to it through the annular groove (the annular groove 18 is connected to the water guide hole through the radial hole) distributed on the outer circle of the left side of the rotating shaft 6, and finally enters the output pipeline installed on the internal threaded hole of the connecting plate 2. The abrasive enters the inner hole on the right side of the mounting seat 9 through the abrasive input pipeline, and then enters the abrasive output pipeline installed on the left side of the rotating shaft 6 through the central cylindrical through hole of the rotating shaft 6.

[0019] When the rotational torque acts on the connecting plate 2, the connecting plate 2 drives the rotating shaft 6 to rotate together, thereby realizing the relative rotation between the output end and the input end during the transportation of high-pressure water and abrasive.

[0020] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A rotary joint for simultaneously rotating and transmitting ultra-high pressure water and abrasive, characterized by: It is suitable for an ultra-high pressure system with a pressure of 300 MPa, comprising a mounting seat (9), a housing (4), a rotating shaft (6) and a connecting plate (2); the mounting seat (9) is provided with a plurality of radial high-pressure water inlet interfaces (13) in the circumferential direction, and the mounting seat (9) is provided with an abrasive inlet (14) in the axial direction; the connecting plate (2) is provided with a plurality of high-pressure water outlet interfaces (15); the connecting plate (2) is fixed to the rotating shaft (6) by a fixing ring (1) and a circular nut (3) and rotates synchronously therewith. An abrasive channel (16) is provided at the center of the rotating shaft (6), and the abrasive channel (16) is connected to the abrasive inlet (14) on the mounting seat (9); a plurality of axial water guide holes (17) are provided on the rotating shaft (6) outside the abrasive channel (16), and an annular groove (18) is provided at each end of the water guide hole (17), and the annular groove (18) is connected to the water guide hole (17) through radial holes at both ends of the rotating shaft, and the annular groove (18) at one end is connected to the high-pressure water outlet hole (19) on the connecting plate (2) The high-pressure water outlet hole (19) is connected to the high-pressure water outlet interface (15), and the annular groove (18) at the other end is connected to the high-pressure water inlet hole (20) of the mounting seat (9); the rotating shaft (6) is installed and positioned in the housing (4) through the thrust bearing (5) and the angular contact bearing (7), and the axial positioning of the rotating shaft is achieved through the boss on the rotating shaft (6) and the support pad (8) close to one end of the mounting seat, and the housing (4) is installed on the mounting seat (9); the rotating shaft (6) is close to the mounting seat ( 9) is provided with a high-pressure sealing ring (10) on each side of the annular groove (18) on one end; the water guide hole (17) is a blind hole structure, and a sealing steel ball (11) is installed on its open end, and the sealing steel ball (11) is fixed by a set screw (12) on the end surface of the rotating shaft; the plurality of high-pressure water inlet interfaces (13) on the mounting seat (9) are symmetrically installed on the mounting seat (9) to ensure force balance, and the high-pressure water inlet interface (13) is connected to the high-pressure water input joint through a thread.

2. The rotary joint for simultaneously rotating and transmitting ultrahigh pressure water and abrasive according to claim 1 is characterized in that The plurality of high-pressure water outlet interfaces (15) on the connecting plate (2) are symmetrically distributed on the connecting plate (2), and the high-pressure water outlet interfaces (15) are connected to the high-pressure water output connector via threads.

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