CN217951573U - Hydraulic oil pipe structure with rotary joint - Google Patents

Abstract

The utility model discloses a hydraulic pressure oil pipe structure with rotary joint relates to hydraulic pressure oil pipe technical field. The method comprises the following steps: a first hard tube, a second hard tube and a hose arrangement; the first end of the first hard pipe is communicated with the hydraulic cylinder through a rotary joint; the first end of the second hard pipe is communicated with the hydraulic station through a rotary joint; the first hard pipe and the second hard pipe are communicated through a hose structure; the hose structure comprises a connecting hose; and the two ends of the connecting hose are connected with connecting pipes through a closed fixing structure. The utility model discloses a directly reform transform on the basis of original product, add hose construction in the centre of connecting the hard tube, can eliminate because of the rotatory push-and-pull power that brings with rotatory axle sleeve wearing and tearing of pneumatic cylinder, increased the life of rotatory axle sleeve, greatly reduced the time of shutting down the change, greatly reduced equipment purchasing cost prolongs equipment life greatly, reduces the equipment maintenance number of times.

Description

Hydraulic oil pipe structure with rotary joint

Technical Field

The utility model relates to a hydraulic pressure oil pipe technical field specifically is a hydraulic oil pipe structure with rotary joint.

Background

Normal hot rolling coiling machine is after putting into use, the oil leak often takes place for the rotary joint of wrapper roll, it is the flange fracture that compresses tightly on the rotary joint to unpack the back discovery, several rotary joints have not been changed and can not solve the problem, through many kinds of inspection measurement, discover to need to use to connect the hard tube to be linked together for communicating hydraulic pressure station and pneumatic cylinder, and rotary joint sets up the both ends at connecting the hard tube, the position of connecting hard tube and rotary joint can not change when initial, but in long-term use, rotary joint and connection hard tube can take place relative displacement after the pneumatic cylinder has rotated certain angle, therefore rotary joint can bear certain tensile stress, and the rotatory axle sleeve of pneumatic cylinder is worn and can make rotary joint bear the pulling force or the thrust that comes from connecting the hard tube when the spin, cause the flange to split, in case rotary joint department leaks oil, the coiling machine will shut down and change whole connection hard tube and revolution mechanic, long time when changing, and new rotary joint uses the fracture again after the short time, cause a vicious circle, because it is complicated to use rotary joint on the hot rolling machine, the price, comparatively expensive purchase price, and the oil leak through the higher cost of this kind of the novel rotary joint of the circumstances, the oil is carried out to the high-cost of the utility model.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydraulic oil pipe structure with rotary joint to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a hydraulic pressure oil pipe structure with rotary joint includes: a first hard tube, a second hard tube and a hose arrangement; the first end of the first hard pipe is communicated with the hydraulic cylinder through a rotary joint; the first end of the second hard pipe is communicated with the hydraulic station through a rotary joint; the first hard pipe and the second hard pipe are communicated through a hose structure; the hose structure comprises a connecting hose; the two ends of the connecting hose are connected with connecting pipes through a closed fixed structure, and the connecting pipes at the two ends of the connecting hose are respectively fixed with the second ends of the first hard pipe and the second hard pipe in a sealing manner through flange structures; the closed fixing structure is used for ensuring the sealing property of the connecting hose and the connecting pipe; the flange structure is used for ensuring the sealing performance between the first hard pipe and the connecting pipe and between the second hard pipe and the connecting pipe.

In this technical solution, preferably, the connecting pipe includes a first connecting pipe and a second connecting pipe;

the flange structure comprises a half-half type flange and a full-half type flange; wherein: the second ends of the first hard pipe and the second hard pipe are fixedly connected with full-half type flanges; the first connecting pipe is provided with a half-and-half flange, and the second connecting pipe is movably sleeved with a full-half flange.

Preferably among this technical scheme, the connecting pipe is the pipe column structure, follows the radial of connecting pipe, its first end is provided with the connection arch of its edge of outstanding, connecting grooves has all been seted up in half-and-half formula flange and the full-half formula flange, connecting arch and connecting groove looks adaptation.

Preferably in this technical scheme, a seal groove has been seted up to the terminal surface of first end of first connecting pipe, the seal groove is used for placing seal ring.

Preferably in this technical solution, the airtight fixing structure includes: the clamping device comprises a fastener, a clamping protrusion and a clamping groove; the clamping protrusions are arranged on the inner walls of the two ends of the connecting hose; the clamping groove is formed in the outer wall of the second end of the connecting pipe; the clamping protrusion is matched with the clamping groove; the fastener can make joint recess and joint protruding inconsistent.

Preferably, in the technical scheme, the fastener is of a circular tubular structure, the first end of the fastener is fixedly connected with a limiting bulge which extends along the radial direction of the fastener and towards the axial lead of the fastener, and the limiting bulge is of an annular structure.

Preferably, in the technical scheme, the inner diameter of the fastener is gradually increased from the first end to the second end of the fastener along the axial lead direction of the fastener; a sealing ring is movably sleeved outside the connecting hose; the inner wall of the second end of the fastener is in threaded connection with a pressurizing piece; the pressurizing piece is used for extruding the sealing ring to enable the inner wall of the connecting hose to be abutted against the outer wall of the connecting pipe.

In this embodiment, preferably, the pressure member includes a threaded pipe and a rotating ring; the threaded pipe is of a tubular structure; the threaded pipe and the rotating ring are fixed, and the rotating ring is superposed with the axial lead of the threaded pipe; the rotating ring is uniformly provided with rotating grooves at equal intervals, and the opening direction of the rotating grooves is parallel to the axial lead direction of the rotating ring.

Preferably, in the technical scheme, the pipe diameter of the second end of the connecting pipe is suddenly reduced, and a limiting interval is formed; the outer diameter of the connecting hose is larger than the inner diameter of the limiting bulge; the outer diameter of the limiting interval is larger than the inner diameter of the limiting bulge, and the outer diameter of the second end of the connecting pipe is smaller than the inner diameter of the limiting bulge.

In the technical scheme, the fastener is preferably any one or a combination of a hose clamp, a hoop, a pipe clamp and a pipe clamp.

Compared with the prior art, the beneficial effects of the utility model are that:

according to the hydraulic oil pipe structure with the rotary joint and the manufacturing method thereof, the hose structure is added in the middle of the connecting hard pipe through direct transformation on the basis of original products, so that the push-pull force caused by rotation of a hydraulic cylinder and abrasion of a rotary shaft sleeve can be eliminated, the service life of the rotary shaft sleeve is prolonged, the time for shutdown and replacement is greatly shortened, the equipment purchase cost is greatly reduced, the service life of the equipment is greatly prolonged, and the equipment maintenance frequency is reduced.

Meanwhile, through the design of the closed fixing structure, the changed structure has better sealing performance, and although the improved structure has more pipe joints, the improved structure still has better sealing performance due to the effect of the closed fixing structure.

Drawings

FIG. 1 is a perspective view of the prior art of the present invention;

fig. 2 is a perspective view of the present invention;

fig. 3 is a perspective view of the hose structure according to the present invention;

fig. 4 is a sectional view of the hose structure according to the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4 according to the present invention;

FIG. 6 is an enlarged view of portion B of FIG. 4 according to the present invention;

fig. 7 is a perspective view of a first connection pipe according to the present invention;

fig. 8 is a cross-sectional view of a second embodiment of the fastener proposed by the present invention;

fig. 9 is a front view of the pressing member according to the present invention;

fig. 10 is an enlarged view of a portion C in fig. 8 according to the present invention.

In the figure: 1. connecting a hard pipe; 11. a first rigid tube; 12. a second rigid tube; 2. a rotary joint; 3. a hose construction; 31. a connecting hose; 311. clamping the protrusions; 32. a fastener; 321. a limiting bulge; 33. a first connecting pipe; 331. a connecting projection; 332. a sealing groove; 333. clamping the groove; 334. spacing intervals; 34. a second connecting pipe; 35. a half flange; 351. a connecting groove; 36. a full-half flange; 37. a seal ring; 38. a pressing member; 381. a rotating ring; 382. a threaded pipe; 383. the groove is rotated.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one of the figures, it will not need to be further discussed or illustrated in detail in the description of the figures that follows.

Understanding the technical scheme of the utility model before, need know prior art earlier, as shown in fig. 1, it is prior art's stereogram, wherein the both ends of connecting hard tube 1 all are provided with rotary joint 2, it is linked together pneumatic cylinder and hydraulic pressure station through rotary joint 2 respectively to connect hard tube 1, at the during operation because the pneumatic cylinder needs rotate, and it is hard connection again to connect hard tube 1 and rotary joint 2, consequently in long-term rotatory working process, when the pneumatic cylinder produces the displacement, can lead to connecting and produce the pulling force between hard tube 1 and the rotary joint 2, the rotatory axle sleeve wearing and tearing back of pneumatic cylinder simultaneously, when the pneumatic cylinder is rotatory, can lead to rotary joint 2 to bear the pulling force or the thrust that come from connecting hard tube 1, and then make the flange that compresses tightly on the rotary joint 2 fracture.

Based on this, as shown in fig. 3 and 4, the utility model provides a hydraulic oil pipe structure with rotary joint, this structure includes: the flexible pipe comprises a first hard pipe 11, a second hard pipe 12 and a hose structure 3, wherein a first end of the first hard pipe 11 is communicated with a hydraulic cylinder through a rotary joint 2; the first end of the second hard pipe 12 is communicated with the hydraulic station through the rotary joint 2; first hard tube 11 and second hard tube 12 are linked together through hose construction 3, it needs to know, hose construction 3 has certain flexibility, 1 mode that increases hose construction 3 at original connection hard tube, make and have certain deformation allowance between first hard tube 11 and the second hard tube 12, consequently, when the pneumatic cylinder is at long-term rotatory work or rotatory axle sleeve wearing and tearing, rotary joint 2 can drive second hard tube 12 and first hard tube 11 together and carry out the displacement, it produces at hose construction 3 and warp, and then reduced pressure or pulling force that rotary joint 2 department received, and then can effectual protection rotary joint 2, prevent that it from producing the oil leak.

It should be known, however, owing to changed hose construction 3 into at the middle part of connecting hard tube 1, and hydraulic pressure station and pneumatic cylinder need produce great work power through hydraulic oil at the during operation, therefore the sealed especially important between first hard tube 11 and second hard tube 12 and the hose construction 3, in order to prevent it from producing the oil leak, the utility model provides a specific hose construction 3, it includes connecting hose 31, and connecting hose 31's both ends are connected with the connecting pipe through airtight fixed knot structure, and the connecting pipe at connecting hose 31 both ends is respectively through flange structure and first hard tube 11 and second hard tube 12 second end sealed fixation, the utility model provides an airtight fixed knot structure mainly produces the oil leak in order to prevent that connecting hose 31 and the junction of connecting pipe from, and the utility model provides a flange structure mainly produces the oil leak in order to prevent that the connecting pipe from producing with the junction of first hard tube 11 and second hard tube 12 respectively.

As shown in fig. 4 and 6, the specific sealing and fixing structure includes: fastener 32, protruding 311 and the joint recess 333 of joint, the protruding 311 inner walls that set up in coupling hose 31 both ends of joint, the outer wall at the connecting pipe second end is seted up to joint recess 333, it needs to know, protruding 311 and the joint recess 333 of joint all are provided with a plurality ofly, and the one-to-one, protruding 311 and the adaptation of joint recess 333 of one-to-one joint, therefore when the second end of connecting pipe inserts coupling hose 31 in the middle of, the protruding 311 of joint that is located coupling hose 31 inner wall just in time can fall into the joint recess 333 that is located the connecting pipe outer wall so that increase sealed area of contact, and then increase sealing performance, protruding 311 and the joint recess 333 of joint still have limit function simultaneously, it can effectually prevent because hydraulic pressure is too big, and the phenomenon that coupling hose 31 and the connecting pipe that leads to break away from mutually.

It should be noted that although the sealing performance of the connection pipe and the connection hose 31 can be improved by the clamping protrusion 311 and the clamping groove 333, the connection hose 31 has a certain flexibility, and therefore, under a stronger pressure of hydraulic oil, the connection between the connection pipe and the connection hose 31 needs to be sealed and fixed by the fastener 32, so that it can be known that the fastener 32 in the sealed and fixed structure mainly functions to make the clamping groove 333 and the clamping protrusion 311 touch each other, and further, the connection pipe and the connection hose 31 can be effectively prevented from being separated from each other, and meanwhile, in order to ensure that the fastener 32 has a better fastening effect, the axial length of the fastener 32 along the axial direction of the connection hose 31 needs to be covered by the axial length of the clamping groove 333 at the second end of the connection pipe, so that we can know that the fastener 32 can be a throat hoop, a pipe clamp, or a pipe clamp, and the like, and the present invention provides two embodiments of the fastener 32.

The first embodiment of the fastening member 32 is shown in fig. 4 and 6, the fastening member 32 has a circular tubular structure with uniform pipe diameters, as shown in fig. 6, when the gap formed between the circular tube and the connecting pipe is smaller than the wall thickness of the connecting hose 31, the clamping groove 333 and the clamping protrusion 311 can be made to abut against each other, and when the connecting hose 31 is specifically spliced, the connecting hose 31 is first inserted into the fastening member 32 through the second end of the fastening member 32, and the connecting pipe is further inserted into the connecting hose 31 through the first end of the fastening member 32.

In contrast to the first embodiment, the second embodiment of the fastening member 32 is also a circular tube-shaped structure, but the fastening member 32 is directed from the first end of the fastening member 32 to the second end along the axial line of the fastening member 32, and the inner diameter of the fastening member 32 gradually increases, so that the fastening member 32 is a trumpet-shaped structure, which is convenient for a user to insert the connecting tube into the connecting hose 31, but because the fastening member 32 is a trumpet-shaped structure, it is also necessary to apply pressure to the outer wall of the connecting hose 31 to make the snap groove 333 contact with the snap protrusion 311, and further, it is necessary to movably sleeve the sealing ring 37 on the outside of the connecting hose 31, and the inner wall of the second end of the fastening member 32 is threadedly connected with the pressing member 38, and the pressing member 38 is used to press the sealing ring 37 to make the inner wall of the connecting hose 31 contact with the outer wall of the connecting tube, so that the snap groove 333 contact with the snap protrusion 311 is achieved.

It should be noted that, in order to facilitate the operation of the pressing member 38, the present embodiment provides a specific pressing member 38, which includes a threaded pipe 382, an inclination angle of an outer wall of the threaded pipe 382 is consistent with an inclination angle of an inner wall of the fastening member 32, an outer thread is disposed on an outer wall of the threaded pipe 382, an inner thread is disposed on an inner wall of the fastening member 32, the outer thread is matched with the inner thread, since the threaded pipe 382 is in a tubular structure, in order to facilitate the rotation operation of the threaded pipe 382, a rotating ring 381 is fixedly connected to an end of a larger opening of the threaded pipe 382, an axial line of the rotating ring 381 coincides with an axial line of the threaded pipe 382, rotating grooves 383 are disposed at equal intervals on an edge of the rotating ring 381, a direction of the rotating groove 383 is disposed to be parallel to an axial line of the rotating ring 381, and a user can rotate the rotating ring 381 through the rotating groove 383 by means of a tool such as a pipe wrench, etc., and certainly, the rotating ring 381 can be designed into a hexagonal prism structure.

Also for the convenience of the user, based on the fastening device 32 in the first and second embodiments, as shown in fig. 10, a limiting protrusion 321 extending to the axial line of the fastening device 32 along the radial direction of the fastening device 32 is fixedly connected to the first end of the fastening device 32, and the limiting protrusion 321 has a circular ring structure, in which: the second end of the connecting pipe has a sudden reduction in pipe diameter and forms a limiting space 334; the outer diameter of the connecting hose 31 is larger than the inner diameter of the limiting protrusion 321, the outer diameter of the limiting interval 334 is larger than the inner diameter of the limiting protrusion 321, and the outer diameter of the second end of the connecting pipe is smaller than the inner diameter of the limiting protrusion 321, so that in the using process, the limiting protrusion 321 can limit the connecting hose 31 in the fastener 32 to prevent the connecting hose from penetrating through the first end of the fastener 32, and the limiting interval 334 can enable the second end of the connecting pipe, which contains the clamping groove 333, to go deep into the fastener 32, and other parts of the connecting pipe are exposed outside the fastener 32, so that accurate clamping of the clamping groove 333 and the clamping protrusion 311 can be realized, and the connecting pipe is convenient for a user to operate, and is simple in structure and low in manufacturing cost.

As shown in fig. 2 to 4, the connection pipe includes a first connection pipe 33 and a second connection pipe 34, and the flange structure includes a half-and-half flange 35 and a full-and-half flange 36, wherein: the second ends of the first hard pipe 11 and the second hard pipe 12 are fixedly connected with a full-half flange 36, a half-and-half flange 35 is arranged on the first connecting pipe 33, the full-half flange 36 is movably sleeved on the second connecting pipe 34, the connecting pipe is in a circular tubular structure, a connecting bulge 331 protruding out of the edge of the connecting pipe is arranged at the first end of the connecting pipe in the radial direction, a connecting groove 351 is formed in each of the half-and-half flange 35 and the full-half flange 36, the connecting bulge 331 is matched with the connecting groove 351, the first hard pipe 11 and the first connecting pipe 33 can be fixed by means of the half-and-half flange 35 and the full-half flange 36, the second hard pipe 12 and the second connecting pipe 34 are fixed, it is required to know that in order to enhance the sealing performance, a sealing groove 332 can be formed in the end faces of the first ends of the first connecting pipe 33 and the second connecting pipe 34, the sealing groove 332 is used for placing a sealing washer, and the sealing performance is enhanced by a mode of placing a sealing washer.

Based on foretell hydraulic pressure oil pipe structure that has rotary joint, the utility model provides a manufacturing method of this structure, its manufacturing step is as follows:

s1: firstly, cutting off the connecting hard pipe 1 from the middle by using a cutting tool to form a first hard pipe 11 and a second hard pipe 12, and grinding and polishing the cuts of the first hard pipe 11 and the second hard pipe 12 by using a grinding tool;

s2: welding an upper half flange 36 to the second ends of the first hard pipe 11 and the second hard pipe 12 respectively;

s3: a full-half flange 36 is movably sleeved on the second connecting pipe 34, and the first connecting pipe 33 and the second connecting pipe 34 are fixedly connected to two ends of the connecting hose 31 through fasteners 32 respectively;

when the fastener 32 is as shown in fig. 4, the connecting hose 31 is first inserted from the second end of the fastener 32, and the end of the connecting hose 31 is contacted with the inner wall of the limiting protrusion 321, and the second connecting pipe 34 sleeved with the full-half flange 36 is further inserted from the first end of the fastener 32, and the clamping groove 333 on the second connecting pipe 34 is clamped with the clamping protrusion 311 on the inner wall of the connecting hose 31;

when the fastener 32 is as shown in fig. 8, the pressing member 38 and the sealing ring 37 are movably sleeved on the connecting hose 31 in sequence, then the connecting hose 31 is inserted from the second end of the fastener 32, and the end of the connecting hose 31 is contacted with the inner wall of the limiting protrusion 321, further the second connecting pipe 34 sleeved with the full-half flange 36 is inserted from the first end of the fastener 32, and the clamping groove 333 on the second connecting pipe 34 is clamped with the clamping protrusion 311 on the inner wall of the connecting hose 31, further the sealing ring 37 is pushed into the gap formed by the fastener 32 and the connecting hose 31, and the pressing member 38 and the fastener 32 are fixed by screwing, preferably, the rotating ring 381 on the pressing member 38 is rotated by a tool such as a pipe wrench or a spanner, so that the pressing member 38 can apply pressure on the sealing ring 37 until the clamping groove 333 is abutted against the clamping protrusion 311;

s4: connecting the connecting hose 31 with the second hard pipe 12 through the full-half flange 36 on the second connecting pipe 34 and the full-half flange 36 on the second hard pipe 12, and if necessary, arranging an upper sealing gasket between the full-half flanges 36;

s5: the connecting tube 31 is connected to the first hard tube 11 via the half-flange 35 and the full-half flange 36 on the first hard tube 11, and if necessary, a sealing gasket is provided between the half-flange 35 and the full-half flange 36.

It needs to know, before carrying out the utility model discloses an improve the front, rotary joint 2 is the vulnerable part at long-term operation, and the time of changing rotary joint 2 is about 3-4 hours, after adopting this utility model discloses the structure, hose construction 3 then is the vulnerable part of long-term operation, and the time of changing coupling hose 31 only needs 0.75-1 hour, great shortening the maintenance duration of equipment, simultaneously the utility model discloses structure before improving uses 2 months back rotary joint 2 can produce the damage promptly, need change, and adopt the utility model discloses structure about 2 years just need change coupling hose 31, and the utility model provides a coupling hose 31 compares with rotary joint 2, and its cost is extremely low.

Through cutting off certain length connecting hard tube 1, the hose construction 3 that the preparation is the same with the steel pipe length that cuts off, can hold rotary joint 2 after installing like this, make rotary joint 2 be unlikely to follow the pneumatic cylinder and rotate and hinge bad oil pipe or rotary joint 2, change hose construction 3's joint into with the connecting pipe that connects hard tube 1 and rotary joint 2 and match, realize standard convertibility like this, through the structure that changes, stable in use, stress has also not been had when rotatory, the structure after changing is not taking place the oil leak, cross and directly reform transform on the basis of original product, add hose construction in the centre of connecting the hard tube, can eliminate the push-pull force because of the pneumatic cylinder is rotatory and the wearing and tearing of rotatory axle sleeve bring, the life of rotatory axle sleeve has been increased, the time of shutting down the change has been reduced greatly.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a hydraulic oil tubular construction with rotary joint which characterized in that includes: a first rigid tube (11), a second rigid tube (12) and a hose construction (3);

the first end of the first hard pipe (11) is communicated with the hydraulic cylinder through a rotary joint (2);

the first end of the second hard pipe (12) is communicated with the hydraulic station through a rotary joint (2);

the first hard pipe (11) and the second hard pipe (12) are communicated through a hose structure (3);

the hose structure (3) comprises a connection hose (31);

the two ends of the connecting hose (31) are connected with connecting pipes through a closed fixing structure, and the connecting pipes at the two ends of the connecting hose (31) are respectively fixed with the second ends of the first hard pipe (11) and the second hard pipe (12) in a sealing manner through flange structures;

the closed fixing structure is used for ensuring the sealing performance of the connecting hose (31) and the connecting pipe;

the flange structure is used for ensuring the sealing performance between the first hard pipe (11) and the second hard pipe (12) and the connecting pipe respectively.

2. Hydraulic oil pipe arrangement with swivel joint according to claim 1, characterized in that the connection pipe comprises a first connection pipe (33) and a second connection pipe (34);

the flange structure comprises a half-half flange (35) and a full-half flange (36);

wherein: the second ends of the first hard pipe (11) and the second hard pipe (12) are fixedly connected with full-half type flanges (36);

the first connecting pipe (33) is provided with a half-and-half flange (35), and the second connecting pipe (34) is movably sleeved with a full-half flange (36).

3. The hydraulic oil pipe structure with a rotary joint as claimed in claim 2, wherein the connecting pipe is a circular pipe structure, a first end of the connecting pipe is provided with a connecting protrusion (331) protruding out of an edge of the connecting pipe along a radial direction of the connecting pipe, the half-and-half type flange (35) and the full-half type flange (36) are respectively provided with a connecting groove (351), and the connecting protrusion (331) and the connecting groove (351) are matched.

4. The hydraulic oil pipe structure with the rotary joint as recited in claim 2 or 3, characterized in that the end face of the first end of the first connecting pipe (33) is provided with a sealing groove (332), and the sealing groove (332) is used for placing a sealing gasket.

5. The hydraulic oil pipe structure with a rotary joint as claimed in any one of claims 1 to 3, wherein the airtight fixed structure comprises: the clamping device comprises a fastener (32), a clamping protrusion (311) and a clamping groove (333);

the clamping protrusions (311) are arranged on the inner walls of the two ends of the connecting hose (31);

the clamping groove (333) is formed in the outer wall of the second end of the connecting pipe;

the clamping protrusion (311) is matched with the clamping groove (333);

the fastener (32) can enable the clamping groove (333) to be in contact with the clamping protrusion (311).

6. The hydraulic oil pipe structure with the rotary joint as claimed in claim 5, wherein the fastening member (32) is a circular pipe-shaped structure, and a first end of the fastening member (32) is fixedly connected with a limiting protrusion (321) extending along a radial direction of the fastening member (32) to an axial line of the fastening member (32), and the limiting protrusion (321) is a circular ring-shaped structure.

7. Hydraulic oil pipe arrangement with swivel joint according to claim 6, characterized in that the inner diameter of the fastening member (32) increases gradually from the first end to the second end of the fastening member (32) along the axial center line of the fastening member (32);

a sealing ring (37) is movably sleeved outside the connecting hose (31);

a pressurizing piece (38) is connected to the inner wall of the second end of the fastening piece (32) in a threaded mode;

the pressurizing member (38) is used for pressing the sealing ring (37) to enable the inner wall of the connecting hose (31) to be in contact with the outer wall of the connecting pipe.

8. Hydraulic oil pipe arrangement with swivel joint according to claim 7, characterized in that the pressure piece (38) comprises a threaded pipe (382) and a rotating ring (381);

the threaded pipe (382) is of a tubular structure;

the threaded pipe (382) and the rotating ring (381) are fixed, and the axial lead of the rotating ring (381) is overlapped with that of the threaded pipe (382);

the rotating ring (381) is equidistantly and uniformly provided with rotating grooves (383), and the opening direction of the rotating grooves (383) is parallel to the axial lead direction of the rotating ring (381).

9. Hydraulic oil pipe arrangement with swivel joint according to claim 6, characterized in that the second end of the connecting pipe has a pipe diameter that decreases abruptly and is formed with a spacing interval (334);

the outer diameter of the connecting hose (31) is larger than the inner diameter of the limiting bulge (321);

the outer diameter of the limiting interval (334) is larger than the inner diameter of the limiting protrusion (321), and the outer diameter of the second end of the connecting pipe is smaller than the inner diameter of the limiting protrusion (321).

10. Hydraulic oil pipe structure with swivel joint according to claim 5, characterized in that the fastener (32) is any one or combination of hose clamp, hoop, pipe clamp and pipe clamp.

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