CN111911725A - Rotary joint for connecting water cutting equipment with high-pressure water pipe - Google Patents

Abstract

The invention relates to the technical field of water cutting, and provides a rotary joint used for water cutting equipment to connect high-pressure water pipes, comprising a shell assembly with a hollow cavity, a rotating shaft with a through hole and a sealing assembly; one end of the shell assembly is used for It is connected with the water inlet end of the high-pressure water pipe; the rotating shaft passes through the hollow cavity, and one end of the rotating shaft extends out of the other end of the casing assembly, and the end extending out of the casing assembly is used to connect with the water cutting head; the rotating shaft passes through the The provided step is clamped on the inner wall of the casing assembly and can be rotated relative to the casing assembly; the outer wall of the rotating shaft and the inner wall of the hollow cavity are in sealing contact through a sealing assembly sleeved on the outer wall of the rotating shaft. When the water cutting head connected with the rotating shaft rotates, the rotating shaft can also be driven to rotate at the same time, so that the rotating shaft rotates in the hollow cavity, so as to realize the conversion of the metal hard pipe into a relatively rotatable pipe, and realize the high-pressure water transportation in the process of conveying high pressure water. At the same time, it follows the rotation and movement of the water cutting head.

Description

A rotary joint used for water cutting equipment to connect high-pressure water pipes

technical field

The invention relates to the technical field of water cutting, in particular to a rotary joint used for water cutting equipment to connect high-pressure water pipes.

Background technique

The characteristics of water cutting are that there is no thermal stress, and the material to be cut does not undergo chemical changes or deformation. Especially, the five-axis water cutting can perform one-time cutting processing of any curve for any material, so it is widely used in cutting in various industries. The high-pressure pump delivers high-pressure water to the cutting head. The pipeline is a metal hard pipe, which cannot be twisted or rotated. When the five-axis water cutting head performs three-dimensional movement and cutting on the workpiece, the metal hard pipe cannot rotate with the cutting head. move.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the prior art, the present invention provides a rotary joint used for water cutting equipment to connect a high-pressure water pipe, which is used to solve the problem that the metal hard pipe conveying high-pressure water to the cutting head cannot rotate with the cutting head in the prior art Mobile technical issues.

The technical scheme that the present invention proposes with respect to the above-mentioned technical problems is as follows:

The invention provides a rotary joint used for water cutting equipment to connect high-pressure water pipes, comprising a shell assembly with a hollow cavity, a rotary shaft with a through hole and a sealing assembly;

One end of the housing assembly is used for connecting with the water inlet end of the high-pressure water pipe;

The rotating shaft is penetrated in the hollow cavity, and one end of the rotating shaft extends out of the other end of the casing assembly, and one end of the rotating shaft extends out of the casing assembly for connecting with the water cutting head;

The rotating shaft is clamped on the inner wall of the casing assembly through the steps provided by the rotating shaft, and can rotate relative to the casing assembly;

The outer wall of the rotating shaft is in sealing contact with the inner wall of the hollow cavity through a sealing assembly sleeved on the outer wall of the rotating shaft.

According to the above-mentioned rotary joint used for water cutting equipment to connect high-pressure water pipes, the rotary joint further includes a positioning assembly arranged in the hollow cavity, the positioning assembly is connected with the inner wall of the housing assembly, and the rotating shaft It passes through the positioning assembly, and the rotating shaft is in clearance fit with the positioning assembly.

According to the above-mentioned rotary joint for water cutting equipment to connect high-pressure water pipes, the positioning assembly includes a first positioning member and a second positioning member respectively provided on both sides of the step of the rotating shaft, and the inner wall of the first positioning member is There is a first gap with the outer wall of the rotating shaft, and the inner wall of the second positioning member has a second gap with the outer wall of the rotating shaft;

The sealing assembly includes a first sealing member for sealing high-pressure water, and the first sealing member is disposed on a side of the first positioning member away from the step and abuts with the first positioning member;

The sealing assembly further includes a second sealing member for sealing external sundries, the second sealing member is disposed on a side of the second positioning member away from the step and abuts with the second positioning member.

According to the above-mentioned rotary joint for water cutting equipment to connect high-pressure water pipes, an end of the first sealing member close to the first positioning member is provided with a convex outer cone portion, and the first positioning member is close to the first positioning member. One end of a sealing member is provided with a concave inner conical portion adapted to the outer conical portion, and the outer conical portion is arranged in the inner conical portion.

According to the above-mentioned rotary joint for water cutting equipment to connect high-pressure water pipes, the first sealing member includes a sealing member main body, and an outer wall of the sealing member main body is provided with a groove, and the groove is provided with a protrusion protruding from the outer wall of the sealing member. The sealing ring of the groove, and the sealing member body is in abutment with the first positioning member.

According to the above-mentioned rotary joint for water cutting equipment to connect high-pressure water pipes, the first positioning member is provided with at least one overflow hole, the housing assembly is provided with observation holes, and each observation hole is connected with the at least one overflow hole. An overflow hole is connected.

According to the above-mentioned rotary joint used for water cutting equipment to connect high-pressure water pipes, an O-ring is also provided on the periphery of the housing assembly, and seals the observation hole to prevent external debris from entering the hollow cavity.

According to the above-mentioned rotary joint for water cutting equipment to connect high-pressure water pipes, the rotary joint further comprises a thrust bearing sleeved on the outer wall of the rotary shaft and used for supporting an axial thrust along the rotary shaft, and the thrust The bearing is arranged between the support platform of the inner wall of the housing assembly and the step of the rotating shaft.

According to the above-mentioned rotary joint for water cutting equipment to connect high-pressure water pipes, the housing assembly includes a first upper housing and a first lower housing that are detachably connected;

The top of the first upper casing is provided with a first water inlet hole and a first connection part for connecting with the water inlet end of the high-pressure water pipe, the first water inlet hole and the rotating shaft are located on the same axis, and are connected to the same axis. The through holes of the rotating shaft are communicated;

One end of the rotating shaft away from the first water inlet hole extends out of the first lower casing.

According to the above-mentioned rotary joint for water cutting equipment to connect high-pressure water pipes, the housing assembly includes a second upper housing and a second lower housing that are detachably connected;

The second upper shell includes an upper shell main body and an adapter seat, the adapter seat is sleeved on the upper shell main body, and the adapter seat is provided with a first connection for connecting with the water inlet end of the high-pressure water pipe. Two connecting parts, the upper shell body is provided with a second water inlet hole and a third water inlet hole in vertical communication with the second water inlet hole, and the second water inlet hole and the rotating shaft are located on the same axis on, and communicates with the through hole;

One end of the rotating shaft away from the second water inlet hole extends out of the second lower casing.

According to the present invention of the above scheme, its beneficial effects are at least as follows:

The rotary joint provided by the present invention is used for water cutting equipment to connect high-pressure water pipes. When the water cutting head connected with the rotating shaft rotates, the rotating shaft connected with the water cutting head can also be driven to rotate at the same time, so that the rotating shaft is in the hollow cavity. Rotation, thereby realizing the conversion of the metal hard pipe into a relatively rotatable pipe, and realizing the rotation and movement of the water cutting head while conveying high-pressure water; the rotary joint provided by the present invention has a simple structure and a small volume, which is convenient for installation in five-axis water cutting In the pipeline of the head; the setting of the sealing component is used to seal the hollow cavity to prevent high-pressure water from entering the hollow cavity.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram 1 of a rotary joint used for water cutting equipment to connect high-pressure water pipes according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional structural diagram 1 of a rotary joint used for water cutting equipment to connect high-pressure water pipes according to an embodiment of the present invention;

3 is a second structural schematic diagram of a rotary joint used for water cutting equipment to connect high-pressure water pipes according to an embodiment of the present invention;

FIG. 4 is a second schematic cross-sectional structural diagram of a rotary joint for connecting a water cutting device to a high-pressure water pipe according to an embodiment of the present invention.

Among them, each reference sign in the figure:

Detailed ways

It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly or indirectly located on the other component. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. Terms "top", "bottom", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outer", etc. The indicated orientation or position is based on the orientation or position shown in the drawings, which is only for the convenience of description, and should not be construed as a limitation on the technical solution. The terms "first" and "second" are only used for the purpose of description, and should not be understood as indicating or implying relative importance or implying indicating the number of technical features. "Plurality" means two or more, unless expressly specifically limited otherwise.

In order to solve the problem in the prior art that the high-pressure pump transporting high-pressure water to the cutting head is a hard metal pipe, which cannot be twisted or rotated. The whole technical problem is that it cannot move with the rotation of the cutting head, and the present invention aims to provide a rotary joint for water cutting equipment to connect high-pressure water pipes. The core idea is: to propose a rotary joint for water cutting equipment to connect high-pressure water pipes, including a shell assembly with a hollow cavity, a rotating shaft with a through hole and a sealing assembly; one end of the shell assembly is used for connecting with The water inlet end of the high-pressure water pipe is connected; the rotating shaft is penetrated in the hollow cavity, one end of the rotating shaft extends out of the other end of the housing assembly, and one end extends out of the casing assembly for connecting with the water cutting head ; The rotating shaft is clamped on the inner wall of the housing assembly through its provided steps, and can be rotated relative to the casing assembly; the outer wall of the rotating shaft and the inner wall of the hollow cavity are sleeved on the inner wall of the casing The sealing assembly of the outer wall of the rotating shaft is in sealing abutment. The rotary joint provided by the present invention is used for water cutting equipment to connect high-pressure water pipes. When the water cutting head connected with the rotating shaft rotates, the rotating shaft connected with the water cutting head can also be driven to rotate at the same time, so that the rotating shaft is in the hollow cavity. Rotation, thereby realizing the conversion of the metal hard pipe into a relatively rotatable pipe, and realizing the rotation and movement of the water cutting head while conveying high-pressure water; And the volume is small, which is convenient to be installed in the pipeline of the five-axis water cutting head; the sealing component is arranged to seal the hollow cavity to prevent high-pressure water from entering the hollow cavity.

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Please refer to FIG. 1 , and in conjunction with FIG. 2 , this embodiment provides a rotary joint 100 for connecting a water cutting device to a high-pressure water pipe, including a housing assembly 10 having a hollow cavity 11 , and a rotating shaft 20 having a through hole 21 . and a sealing assembly 30; one end of the casing assembly 10 is used to connect with the water inlet end of the high-pressure water pipe; one end, and one end that extends out of the casing assembly 10 for connecting with the water cutting head; the rotating shaft 20 is clamped on the inner wall of the casing assembly 10 through the step 22 provided by the rotating shaft 20, and can be opposite to the casing The body assembly 10 rotates; the outer wall of the rotating shaft 20 is in sealing contact with the inner wall of the hollow cavity 11 through a sealing assembly 30 sleeved on the outer wall of the rotating shaft 20 .

The working principle of the rotary joint 100 provided in this embodiment for connecting a water cutting device to a high-pressure water pipe may be as follows:

Since the housing assembly 10 has the hollow cavity 11 , the rotating shaft 20 with the through hole 21 is placed in the hollow cavity 11 , and is clamped to the inner wall of the housing assembly 10 through the step 22 of the rotating shaft 20 . After one end is connected to the water inlet end of the high-pressure water pipe, the high-pressure water can circulate in the through hole 21 of the rotating shaft 20. Since the end of the rotating shaft 20 extending out of the housing assembly 10 is connected to the water cutting head, the through hole 21 is connected to the water cutting head. The high pressure water circulating in 21 can be circulated to the water cutting head. When the water cutting head rotates, the rotating shaft 20 connected with the water cutting head can also be driven to rotate at the same time, so that the rotating shaft 20 rotates in the hollow cavity 11, thereby realizing the conversion of the metal hard pipe into a relatively rotatable pipe, realizing It follows the rotation of the water cutting head while delivering high-pressure water. The sealing assembly 30 is configured to seal the hollow cavity 11 to prevent high-pressure water from entering the hollow cavity 11 .

The beneficial effects of the rotary joint 100 for connecting a water cutting device to a high-pressure water pipe provided by this embodiment are at least as follows:

(1) The rotary joint 100 provided in this embodiment for connecting the water cutting equipment to the high-pressure water pipe, when the water cutting head connected with the rotating shaft 20 rotates, the rotating shaft 20 connected with the water cutting head can also be driven to rotate at the same time, The rotating shaft 20 is made to rotate in the hollow cavity 11, so as to realize the transformation of the metal hard pipe into a relatively rotatable pipe, and realize the rotation and movement of the water cutting head while conveying high-pressure water.

(2) The rotary joint 100 provided in this embodiment for connecting a water cutting device to a high-pressure water pipe is simple in structure and small in volume, and can be easily installed in the pipeline of the five-axis water cutting head.

(3) The sealing assembly 30 is provided to seal the hollow cavity 11 to prevent high-pressure water from entering the hollow cavity 11 .

In one embodiment, the rotary joint 100 further includes a positioning component 40 disposed in the hollow cavity 11 , the positioning component 40 is connected to the inner wall of the housing component 10 , and the rotating shaft 20 passes through on the positioning element 40 , and the rotating shaft 20 is in clearance fit with the positioning element 40 . A positioning assembly 40 is arranged in the hollow cavity 11 and is sleeved on the outside of the rotating shaft 20. The rotating shaft 20 and the positioning assembly 40 are in clearance fit, so as to realize the positioning and guidance of the rotating shaft 20 and prevent the rotating shaft 20 from generating Deflection, thus ensuring that the rotating shaft 20 can run smoothly under the driving of the water jet cutting head.

In one embodiment, the positioning assembly 40 includes a first positioning member 41 and a second positioning member 42 respectively disposed on both sides of the step 22 of the rotating shaft 20 , and the inner wall of the first positioning member 41 is connected to the The outer wall of the rotating shaft 20 has a first gap 43 , and the inner wall of the second positioning member 42 and the outer wall of the rotating shaft 20 have a second gap 44 . A first positioning member 41 and a second positioning member 42 are respectively provided on both sides of the step 22 of the rotating shaft 20 , and the rotating shaft 20 is positioned and guided by the cooperation of the first positioning member 41 and the second positioning member 42 , so that the rotating shaft 20 Driven by the water cutting head, it rotates more smoothly in the hollow cavity 11 . It should be understood that the positioning assembly 40 is not limited to include the first positioning member 41 and the second positioning member 42 disposed on both sides of the step 22, and may be positioning members disposed at other positions and numbers, which is not limited here.

The sealing assembly 30 includes a first sealing member 31 for sealing high-pressure water, and the first sealing member 31 is disposed on the side of the first positioning member 41 away from the step 22 and is connected to the first positioning member. 41 abuts; the sealing assembly 30 further includes a second sealing member 32 for sealing external debris, the second sealing member 32 is provided on the side of the second positioning member 42 away from the step 22 and is connected to the The second positioning member 42 abuts against. The first sealing member 31 and the second sealing member 32 are respectively provided at both ends of the hollow cavity 11 . The first sealing member 31 is provided to prevent high-pressure water from entering the middle and lower parts of the hollow cavity 11 . The second sealing member 32 The setting of is used to prevent external sundries from entering into the hollow cavity 11 , thereby avoiding wear on various components in the hollow cavity 11 , and making the rotating shaft 20 run smoothly.

In one embodiment, the cross section of the second seal 32 is Y-shaped.

In one embodiment, an end of the first sealing member 31 close to the first positioning member 41 is provided with a convex outer cone 311 , and the first positioning member 41 is close to the first sealing member 31 . One end is provided with a concave inner conical portion 411 which is adapted to the outer conical portion 311 , and the outer conical portion 311 is arranged in the inner conical portion 411 . The outwardly convex outer cone portion 311 provided on the first sealing member 31 is connected to the inner concave inner cone portion 411 provided on the first positioning member 41 , and the outer diameter of the outer cone portion 311 is the same as that of the inner cone portion 411 . The inner diameter is adapted and can be closely matched. Under the axial impulse of the high-pressure water, the first seal 31 automatically compensates the encircling seal for the rotating shaft 20, and the inner cone 411 can assist the outer cone 311 to provide the rotating shaft 20. Encircling the thrust, thereby improving the sealing effect of the first sealing member 31, prolonging the sealing life of the first sealing member 31, reducing the number of times of replacing the first sealing member 31, thereby saving costs.

Optionally, the first positioning member 41 includes a positioning fixing base 412 and a positioning cylinder 413, and the positioning fixing base 412 and the positioning cylinder 413 are integral structures, and the concave inner cone 411 is provided in the hollow cylinder 413 , the edge of the positioning and fixing seat 412 is supported and fixed by the boss 12 on the inner wall of the housing assembly 10 , so that the first positioning member 41 is stably fixed in the hollow cavity 11 .

In one embodiment, the first sealing member 31 includes a sealing member main body 312 , an outer wall of the sealing member main body 312 is provided with a groove 3121 , and a groove 3121 is formed in the groove 3121 protruding from the groove 3121 The sealing ring 313 , the sealing element body 312 is in abutment with the first positioning element 41 . The arrangement of the sealing ring 313 enables the rotating shaft 20 to further ensure the sealing effect of sealing the high-pressure water when the rotating shaft 20 rotates relative to the hollow cavity 11 , thereby prolonging the sealing life of the first sealing member 31 . Optionally, the number of the sealing ring 313 and the groove 3121 is one or more. Optionally, the number of the sealing ring 313 and the groove 3121 is two. It should be understood that, the numbers of the sealing ring 313 and the grooves 3121 are not limited to the above situation, and may also be other situations, which are not limited here. Optionally, the outer cone portion 311 is provided at one end of the seal body 312 close to the first positioning member 41 .

In one embodiment, at least one overflow hole 414 is formed on the first positioning member 41 , and observation holes 13 are formed on the housing assembly 10 , each of the observation holes 13 and the at least one overflow hole 414 Connected. The setting of the observation hole 13 and the overflow hole 414 is used to judge whether the first seal 31 fails. When water leakage is observed from the observation hole 13, it can be judged that the first seal 31 has failed and needs to be replaced with a new one. Seal 31 .

Optionally, the overflow hole 414 is provided on the positioning and fixing seat 412 . Optionally, each observation hole 13 is communicated with two overflow holes, and among the two overflow holes, the first overflow hole 4141 is communicated with the upper surface of the positioning fixing seat 412, and the second overflow hole 4142 is communicated with the hollow cavity 11, thereby It is possible to collect the discharge situation in multiple directions.

Optionally, the number of observation holes 13 is two, and the two observation holes 13 are centrally symmetric with respect to the center of the rotary joint 100 , and correspondingly, the number of overflow holes 414 is four.

It should be understood that the numbers of the observation holes 13 and the overflow holes 414 are not limited to the above-mentioned situations, and may also be other situations, which are not limited here.

In one embodiment, an O-ring 19 is further provided on the periphery of the housing assembly 10 and seals the observation hole 13 to prevent external debris from entering the hollow cavity 11. When the first sealing ring 31 When it fails, the high-pressure water in the hollow cavity 11 can punch open the O-ring 19 through the observation hole 13, and the user can still observe the overflow through the observation hole 13. When the first sealing ring 31 does not fail, it is used to prevent external Sundries enter into the hollow cavity 11 .

In one embodiment, the rotary joint 100 further includes a thrust bearing 50 sleeved on the outer wall of the rotary shaft 20 and used for supporting the axial thrust along the rotary shaft 20, and the thrust bearing 50 is provided on the between the support table 14 on the inner wall of the housing assembly 10 and the step 22 of the rotating shaft 20 . The thrust bearing 50 is supported and fixed by the support platform 14 on the inner wall of the housing assembly 10 , and the thrust bearing 50 is arranged below the step 22 and abuts the lower surface of the step 22 , and bears the axial thrust of the high-pressure water through the thrust bearing 50 .

In one embodiment, the housing assembly 10 includes a first upper housing 15 and a first lower housing 16 that are detachably connected; the top end of the first upper housing 15 is provided with a first water inlet hole 151 and a The first connecting portion 152 connected to the water inlet end of the high-pressure water pipe, the first water inlet hole 151 is located on the same axis as the rotating shaft 20, and communicates with the through hole 21 of the rotating shaft 20; the rotation One end of the shaft 20 away from the first water inlet hole 151 extends out of the first lower casing 16 .

When the first connection portion 52 is connected to the water inlet end of the high-pressure water pipe, the high-pressure water can flow directly to the through hole 21 of the rotary shaft 20 through the first water inlet hole 151 located on the same axis as the rotary shaft 20, and then to the through hole 21 of the rotary shaft 20. The water cutting head connected with the rotating shaft 20 realizes water cutting on the workpiece.

Optionally, the first upper casing 15 and the first lower casing 16 are connected by threads, and the connection method not only makes the connection between the first upper casing 15 and the first lower casing 16 firm, but also facilitates disassembly and assembly. , when the components in the hollow cavity 11 need to be replaced, it is convenient to replace.

Optionally, the first connection part 152 is connected with the water inlet end of the high pressure water pipe by screw threads, and the connection method not only makes the connection between the first connection part 152 and the water inlet end of the high pressure water pipe firm, but also facilitates disassembly and assembly.

Optionally, one end of the first water inlet hole 151 close to the first connecting portion 152 is set as a bell mouth, which is used for conical sealing when connecting a high-pressure hard pipe.

Referring to FIG. 3 , and referring to FIG. 4 in combination, in another embodiment, the housing assembly 10 includes a second upper housing 17 and a second lower housing 18 that are detachably connected; the second upper housing 17 includes an upper shell body 171 and an adapter seat 172, the adapter seat 172 is sleeved on the upper shell body 171, and the adapter seat 172 is provided with a second connection for connecting with the water inlet end of the high-pressure water pipe. The connecting part 1721, the upper shell body 171 is provided with a second water inlet hole 1711 and a third water inlet hole 1712 in vertical communication with the second water inlet hole 1711, the second water inlet hole 1711 and the The rotating shaft 20 is located on the same axis and communicates with the through hole 21 ; one end of the rotating shaft 20 away from the second water inlet hole 1711 extends out of the second lower casing 18 . When the second connection portion 1721 is connected to the water inlet end of the high-pressure water pipe, the high-pressure water flows from the third water inlet hole 1712 to the second water inlet hole 1711 that is perpendicular to the third water inlet hole 1712. The water hole 1711 and the through hole 21 of the rotating shaft 20 are located on the same axis, and the high-pressure water directly flows into the through hole 21 through the second water inlet hole 1711, and then flows to the water cutting head connected to the rotating shaft 20 to realize the cutting of the workpiece. In the water cutting operation, that is, when the high-pressure water pipe and the water cutting head are in a right-angle orientation, an adapter seat 172 needs to be added to be placed on the main body 171 of the upper casing and connected to the main body 171 of the upper casing.

Optionally, the upper casing main body 171 and the second lower casing 18 are connected by threads, and the connection method not only makes the connection between the upper casing main body 171 and the second lower casing 18 firm, but also facilitates disassembly and assembly. When the parts in the body 11 need to be replaced, it is convenient to replace.

Optionally, the outer wall of the upper shell body 171 is provided on at least one flat part 1713. When the upper shell body 171 is connected with the second lower shell 18, the flat part 1713 can be used to clamp the wrench to lock the second part. Lower case 18 . Optionally, the number of the flat parts 1713 is two, and they are arranged symmetrically.

Optionally, the second connection portion 1721 is threadedly connected to the water inlet end of the high pressure water pipe, and the connection method not only makes the second connection portion 1721 firmly connected to the water inlet end of the high pressure water pipe, but also facilitates disassembly and assembly.

Optionally, one end of the third water inlet hole 1712 close to the second connecting portion 1721 is configured as a bell mouth, which is used for conical sealing when connecting a high-pressure hard pipe.

Optionally, the outer wall of the rotating shaft 20 extending out of the first lower casing 16 or the second lower casing 18 is provided with a reverse thread 23, which is connected to the water jet cutting head through external bolts.

Optionally, the end of the rotating shaft 20 extending out of the first lower housing 16 or the second lower housing 18 is provided with a taper 24 for tapered sealing when connecting the water cutting head.

To sum up, the beneficial effects of the rotary joint 100 provided in this embodiment for connecting a water cutting device to a high-pressure water pipe are at least as follows:

(1) When the water cutting head rotates, the rotating shaft 20 connected with the water cutting head can also be driven to rotate at the same time, so that the rotating shaft 20 rotates in the hollow cavity 11, thereby realizing the conversion of the metal hard pipe into a relatively rotatable The pipeline can rotate and move with the water cutting head while conveying high-pressure water; the rotary joint 100 included in the water cutting equipment provided in this embodiment is simple in structure and small in size, and can be easily installed in the pipeline of the five-axis water cutting head.

(2) The sealing assembly 30 is provided to seal the hollow cavity 11, which can prevent high-pressure water from entering the hollow cavity 11. The first seal 31 has an automatic compensation encircling seal to prolong its service life, and the second seal Both the member 32 and the O-ring 19 can be used to prevent foreign debris from entering the hollow cavity.

(3) The observation hole 13 and the overflow hole 414 are provided for judging whether the first sealing member 31 included in the sealing assembly 30 fails. When water leakage is observed from the observation hole 13, it can be judged that the first sealing member 31 has If it fails, the first seal 31 needs to be replaced with a new one.

(4) A positioning assembly 40 is arranged in the hollow cavity 11 and sleeved on the outside of the rotating shaft 20. The rotating shaft 20 and the positioning assembly 40 are in clearance fit to realize the positioning and guidance of the rotating shaft 20 and prevent rotation. The shaft 20 is deflected, thereby ensuring that the rotating shaft 20 can run smoothly under the driving of the water jet cutting head.

(5) The thrust bearing 50 is supported and fixed by the support platform 14 on the inner wall of the housing assembly 10 , and the thrust bearing 50 is arranged below the step 22 and abuts against the lower surface of the step 22 , and the thrust bearing 50 bears the axial direction of the high-pressure water. thrust.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (10)

1. A rotary joint (100) for water cutting equipment to connect high-pressure water pipes, characterized in that it comprises a housing assembly (10) having a hollow cavity (11), a rotating shaft (20) having a through hole (21) ) and a sealing assembly (30); One end of the housing assembly (10) is used to connect with the water inlet end of the high-pressure water pipe; The rotating shaft (20) is penetrated in the hollow cavity (11), one end of the rotating shaft (20) extends out of the other end of the casing assembly (10), and one end of the rotating shaft (20) extends out of the casing assembly (10) for connecting with the casing assembly (10). Water cutting head connection; The rotating shaft (20) is clamped on the inner wall of the housing assembly (10) through a step (22) provided therein, and is rotatable relative to the housing assembly (10); The outer wall of the rotating shaft (20) is in sealing contact with the inner wall of the hollow cavity (11) through a sealing assembly (30) sleeved on the outer wall of the rotating shaft (20). 2. The rotary joint for connecting water cutting equipment to high-pressure water pipes according to claim 1, wherein the rotary joint (100) further comprises a positioning assembly (40) arranged in the hollow cavity (11) ), the positioning assembly (40) is connected with the inner wall of the housing assembly (10), the rotating shaft (20) passes through the positioning assembly (40), and the rotating shaft (20) is connected to the The positioning assembly (40) is clearance fit. 3. The rotary joint for connecting water cutting equipment to high-pressure water pipes according to claim 2, wherein the positioning assembly (40) comprises two sides of the step (22) respectively provided on the rotary shaft (20). The first positioning member (41) and the second positioning member (42), the inner wall of the first positioning member (41) and the outer wall of the rotating shaft (20) have a first gap (43), the second The inner wall of the positioning member (42) and the outer wall of the rotating shaft (20) have a second gap (44); The sealing assembly (30) includes a first sealing member (31) for sealing high-pressure water, and the first sealing member (31) is provided on the first positioning member (41) away from the step (22) one side and abutting with the first positioning member (41); The sealing assembly (30) further includes a second sealing member (32) for sealing external debris, the second sealing member (32) being provided on the second positioning member (42) away from the step (22) ) side and in contact with the second positioning member (42). 4. The rotary joint used for water cutting equipment to connect high-pressure water pipes according to claim 3, characterized in that: one end of the first sealing member (31) close to the first positioning member (41) is provided with an outer a convex outer conical portion (311), and an end of the first positioning member (41) close to the first sealing member (31) is provided with a concave inner conical portion (311) adapted to the outer conical portion (311). A tapered portion (411), the outer tapered portion (311) is arranged in the inner tapered portion (411). 5. The rotary joint for connecting water cutting equipment to high-pressure water pipes according to claim 3, wherein the first sealing member (31) comprises a sealing member main body (312), and the sealing member main body (312) A groove (3121) is arranged on the outer wall of the groove (3121), and a sealing ring (313) protruding from the groove (3121) is arranged in the groove (3121), and the seal body (312) is connected to the A positioning piece (41) abuts. 6. The rotary joint for connecting water cutting equipment to high-pressure water pipes according to claim 3, characterized in that: at least one overflow hole (414) is opened on the first positioning member (41), and the housing assembly (10) is provided with observation holes (13), and each of the observation holes (13) communicates with the at least one overflow hole (414). 7. The rotary joint for connecting water cutting equipment to high-pressure water pipes according to claim 6, characterized in that: an O-ring (19) is further provided on the periphery of the housing assembly (10), and seals the The observation hole (13) is used to prevent external debris from entering the hollow cavity (11). 8. The rotary joint for water cutting equipment to connect high-pressure water pipes according to claim 1, characterized in that: the rotary joint (100) further comprises an outer wall sleeved on the rotary shaft (20) and used for supporting the edge A thrust bearing (50) for the axial thrust of the rotating shaft (20), and the thrust bearing (50) is provided on the support table (14) on the inner wall of the housing assembly (10) and the rotating shaft (20) ) between the steps (22). 9. The rotary joint for connecting water cutting equipment to high-pressure water pipes according to claim 1, wherein the housing assembly (10) comprises a first upper housing (15) and a first lower housing that are detachably connected housing (16); The top end of the first upper casing (15) is provided with a first water inlet hole (151) and a first connection part (152) for connecting with the water inlet end of the high-pressure water pipe, the first water inlet hole (151) is located on the same axis as the rotating shaft (20), and communicates with the through hole (21) of the rotating shaft (20); One end of the rotating shaft (20) away from the first water inlet hole (151) extends out of the first lower casing (16). 10. The rotary joint for water cutting equipment to connect high-pressure water pipes according to claim 1, characterized in that: the casing assembly (10) comprises a second upper casing (17) and a second lower casing (17) that are detachably connected housing (18); The second upper shell (17) includes an upper shell body (171) and an adapter seat (172), the adapter seat (172) is sleeved on the upper shell body (171), and the adapter The seat (172) is provided with a second connection portion (1721) for connecting with the water inlet end of the high-pressure water pipe, and the upper shell body (171) is provided with a second water inlet hole (1711) and is connected to the second water inlet port (1711). The water hole (1711) is a third water inlet hole (1712) in vertical communication, the second water inlet hole (1711) is located on the same axis as the rotating shaft (20), and is on the same axis as the through hole (21) connected; One end of the rotating shaft (20) away from the second water inlet hole (1711) extends out of the second lower casing (18).

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