CN212715965U - Pipeline structure, cantilever crane conveyor and material conveying equipment - Google Patents

Abstract

The utility model provides a pipeline structure, an cantilever crane conveyor and material conveying equipment. The piping structure includes: a first conduit; the second pipeline is butted with the first pipeline and communicated with the first pipeline; the rotary connecting piece comprises an inner ring and an outer ring which are movably connected, the rotary connecting piece is sleeved on the first pipeline, the inner ring is connected with the first pipeline, and the outer ring is connected with the second pipeline; and the pipe clamp is connected with the first pipeline and the second pipeline and used for limiting the relative movement of the first pipeline and the second pipeline along the butt joint direction. The utility model provides a pipeline structure rotates the connecting piece through setting up, makes first pipeline and second pipeline rotate relatively and wrench movement to improve the exogenic action that pipeline structure received. Especially in the case of forcedly positioning the pipeline structure, the length can be automatically adjusted, so that the stress from the positioning device can be reduced, and the risk of the pipeline structure being twisted and broken can be reduced.

Description

Pipeline structure, cantilever crane conveyor and material conveying equipment

Technical Field

The utility model relates to the technical field of machinery, particularly, relate to a pipeline structure, an cantilever crane conveyor and material conveying equipment.

Background

At present, a conveying pipe of an existing concrete pump truck is attached to each arm support of the concrete pump truck, and the arm supports convey concrete to a specified position through relative rotation. Two adjacent arm support conveying pipes are connected in a switching mode through elbows, and the two elbows can rotate relatively. However, the rotation axes of the two arm supports and the rotation axes of the two elbows may not be on the same axis, so that the concrete pump truck conveying pipe is subjected to additional torsion or shearing force, and the problems of support deformation, fracture failure and the like are easy to occur.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above problems, an object of the present invention is to provide a pipe structure.

Another object of the utility model is to provide an cantilever crane conveyor including above-mentioned pipeline structure.

Still another object of the utility model is to provide a material conveying equipment including above-mentioned cantilever crane conveyor or above-mentioned pipeline structure.

In order to achieve the above object, according to an embodiment of the first aspect of the present invention, there is provided a pipe structure, in which a first pipe and a second pipe are butted against the first pipe, and the second pipe is communicated with the first pipe; the rotary connecting piece comprises an inner ring and an outer ring, the inner ring is fixedly sleeved on the first pipeline, and the outer ring is movably connected with the inner ring; and the pipe clamp is connected with the outer ring and the second pipeline and used for limiting the relative movement of the first pipeline and the second pipeline along the butt joint direction.

The pipeline structure that this scheme provided includes first pipeline, second pipeline, rotation connecting piece and pipe clamp. One pot head of first pipeline is equipped with rotates the connecting piece, rotates the connecting piece and includes inner circle and outer lane, and inner circle and outer lane can rotate relatively. The inner ring is connected with the outer wall of the first pipeline, and the outer ring is connected with the second pipeline. Through setting up the rotation connecting piece for first pipeline, second pipeline can rotate around the central axis relative rotation of rotation connecting piece. Therefore, the relative rotation angle can be automatically adjusted according to the stress conditions of the first pipeline and the second pipeline, and the external force effect on the pipeline structure is improved. Especially in the case of forcedly positioning the pipeline structure, the stress from the positioning device can be reduced by automatically adjusting the relative rotation angle, so that the risk of distortion and fracture of the pipeline structure is reduced. In addition, by providing the pipe clamp, it is possible to limit mutual displacement of the first pipe and the second pipe in the direction of the central axis, reduce the risk of separation of the first pipe and the second pipe caused by the first pipe and the second pipe moving away from each other, break the pipe structure, and help to limit relative movement of the first pipe and the second pipe in the radial direction.

Like this, through setting up rotation connecting piece and pipe clamp and mutually supporting, can make first pipeline and second pipeline release the stress of applying on the pipeline structure through the central axis mode of rotating relatively around rotation connecting piece, reduce stress excessively, pipeline structure "hold out strength", and lead to the possibility of pipeline structure damage to improve pipeline structure's stability in use and life.

In addition, the utility model provides a pipeline structure in above-mentioned embodiment can also have following additional technical characterstic:

in the above embodiment, the surface of the inner ring is a spherical structure, and the spherical structure protrudes to the outer ring; the outer ring is provided with a concave surface structure matched with the spherical surface structure, and the spherical surface structure is matched with the concave surface structure.

In any of the above embodiments, the end surface of the inner ring on the side facing the second pipe is flush with the end surface of the first pipe on the side facing the second pipe.

In any of the above embodiments, the end of the first pipe connected to the second pipe is coaxial with the second pipe, and an elastic sealing ring is disposed between the first pipe and the second pipe and located on one side of the rotary connector.

In any of the above embodiments, the second conduit comprises a pipe body and a flange provided at an end of the pipe body; the flange is connected with the outer ring of the rotary connecting piece through a pipe clamp.

In any of the above embodiments, the pipe clamp comprises a first pipe clamp and a second pipe clamp, and the first pipe clamp and the second pipe clamp are connected through a bolt.

In any of the above embodiments, the outer diameter of the first conduit is less than the inner diameter of the second conduit, or the inner diameter of the first conduit is coincident with the inner diameter of the second conduit.

In any of the above embodiments, the first conduit comprises a straight conduit section and a bent conduit section connected together, the straight conduit section being connected to the second conduit; the length of the straight pipe section along the extending direction is larger than or equal to the width of the inner ring.

An embodiment of the technical scheme of the second aspect of the utility model provides an cantilever crane conveyor, include: a plurality of arm supports, such as the pipeline structure in any embodiment of the technical solution of the first aspect; the pipeline structure is arranged between two relatively rotatably connected arm supports in the plurality of arm supports, or the pipeline structure is arranged at the tail ends of the plurality of arm supports.

The utility model discloses the cantilever crane conveyor that an embodiment of the technical scheme of second aspect provided, because of the pipeline structure in any embodiment in the technical scheme of first aspect, therefore have all beneficial effects that any embodiment of the aforesaid had, no longer describe herein.

An embodiment of the technical scheme of the third aspect of the utility model provides a material conveying equipment, include: the boom conveying device as in any embodiment of the technical solution of the second aspect; or a pipe structure as in any of the embodiments of the first aspect.

The utility model discloses material conveying equipment that an embodiment of the technical scheme of third aspect provided, because of including the cantilever crane conveyor in any embodiment in the technical scheme of second aspect, or including the pipeline structure in any embodiment in the technical scheme of first aspect, therefore have all beneficial effects that any embodiment of the aforesaid has, no longer describe herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a cross-sectional view of a duct structure in an embodiment of the invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

fig. 4 is a cross-sectional view of a conduit structure in an embodiment of the invention;

FIG. 5 is an enlarged view of portion C of FIG. 4;

fig. 6 is a schematic structural diagram of an arm support conveying device in an embodiment of the present invention;

fig. 7 is a schematic structural view of a material conveying apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a material conveying apparatus according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:

100 a pipe structure; 10 a first conduit; 11 a straight tube section; 12 bending the pipe section; 20 a second conduit; 21, a pipe body; 22 a flange; 30 rotating the connecting piece; 31 an inner ring; 310, a spherical structure; 32 outer rings; 320 a concave structure; 40 pipe clamps; 41 a first pipe clamp; 42 a second pipe clamp; 43 bolts; 50 elastic sealing rings; 200 arm support conveying devices; 210 arm support; 300 material handling equipment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The pipeline structure 100, the boom conveyor 200 and the material conveying equipment 300 according to some embodiments of the present invention are described below with reference to fig. 1 to 8.

Some embodiments of the present application provide a piping structure 100.

Example 1

As shown in fig. 1, the piping structure 100 includes: a first pipe 10, a second pipe 20, a swivel connection 30 and a pipe clamp 40. Wherein the second pipeline 20 is butted with the first pipeline 10, and the second pipeline 20 is communicated with the first pipeline 10; the rotary connecting piece 30 comprises an inner ring 31 and an outer ring 32, the inner ring 31 is sleeved on the first pipeline 10, the inner ring 31 is movably connected with the outer ring 32, and the outer ring 32 is connected with the second pipeline 20; the pipe clamp 40 is connected to the outer ring 32 and the second pipe 20, and fixes the outer ring 32 and the second pipe 20 to restrict relative movement of the first pipe 10 and the second pipe 20 in the mating direction.

The first pipe 10 and the second pipe 20 provided in this embodiment are connected by the rotary joint 30, and since the inner ring 31 and the outer ring 32 of the rotary joint 30 can relatively rotate around the central axis of the rotary joint 30, the first pipe 10 connected to the inner ring 31 and the second pipe 20 connected to the outer ring 32 can also relatively rotate around the central axis of the rotary joint 30. Therefore, the relative rotation angle can be automatically adjusted according to the stress conditions on the first pipeline 10 and the second pipeline 20, so as to improve the external force effect on the pipeline structure 100. Especially in the case of forcedly positioning the pipeline structure 100, the stress from the positioning device can be reduced by automatically adjusting the relative rotation angle, thereby reducing the risk of the pipeline structure 100 being twisted and broken.

Meanwhile, by arranging the pipe clamp 40, the outer ring 32 and the second pipeline 20 are fixedly connected through the rotating connecting piece 30, the first pipeline 10 and the second pipeline 20 can be limited in the axial direction, wherein the axial direction is the front-back direction in fig. 1, the first pipeline 10 and the second pipeline 20 can also be supported to a certain extent in the radial direction, and the possibility of twisting off the first pipeline 10 and the second pipeline 20 is reduced.

It will be appreciated that in some embodiments, the first conduit 10 and the second conduit 20 are both round tubes, and the central axis of the first conduit 10 is disposed coaxially with the central axis of the second conduit 20. Wherein the dotted line in fig. 1 represents the central axis, the dotted line located in the first pipe 10 represents the central axis of the first pipe 10, and the dotted line located in the second pipe 20 represents the central axis of the second pipe 20.

Example 2

On the basis of embodiment 1, as shown in fig. 1 and fig. 2, the surface of the inner ring 31 is a spherical structure 310, and the spherical structure 310 faces the outer ring 32; the outer ring 32 is provided with a concave structure 320 matched with the spherical structure 310, and the spherical structure 310 is matched with the concave structure 320.

The pipeline structure 100 provided by the embodiment is provided with the spherical structure 310 on the inner ring 31, the concave structure 320 matched with the spherical structure 310 is arranged on the outer ring 32, and the spherical structure 310 is suitable for rotating in the concave structure 320, so that the inner ring 31 and the outer ring 32 can be twisted relatively on the basis of relatively rotating around the central axis of the rotating connecting piece 30, the automatic adjustment capability of the pipeline structure 100 is correspondingly increased, and the pipeline structure 100 has wider application scenes. Especially in the case of forcedly positioning the pipeline structure 100, the stress from the positioning device can be released by the relative twisting of the first pipeline 10 and the second pipeline 20, so as to reduce the risk of twisting and breaking of the pipeline structure 100, and further improve the service stability and the service life of the pipeline structure 100.

Here, it can be understood that, in the case of providing the spherical structure 310, the amplitude of the relative twisting of the first pipe 10 and the second pipe 20 is small, so that the change of the angle between the first pipe 10 and the second pipe 20 is small during the twisting, and as shown in fig. 2, the portion of the first pipe 10 extending into the second pipe 20 toward the end of the second pipe 20 is small, so that the change amount of the pipe diameter during the twisting can be ignored. In this way, by setting the first pipeline and the second pipeline to be the same or close to each other, the speed change of the fluid in the pipeline structure 100 from the first pipeline to the second pipeline can be reduced, especially for the case that the fluid is a concrete mixture, the concrete mixture is formed by mixing cement, sand, stone and water, and contains both a solid phase and a liquid phase, and because of its large yield value, during pumping, a solid plug is formed on the section of the pipeline structure 100 in the extending direction of the pipeline structure 100, and the whole body slides forwards along the pipeline structure 100 at the same speed, so as to satisfy the plug flow condition of concrete mixture delivery, and a thin cement paste layer is formed on the inner surface of the pipeline structure 100 to play a lubricating role, so that the external force required by concrete mixture delivery is smaller than the pressure of the concrete mixture flowing, and the delivery is convenient. That is, the arrangement of the spherical structures 310 and the concave structures 320 does not damage the "plug flow" condition of concrete delivery, and the concrete can be delivered smoothly.

Example 3

In addition to embodiment 1 or embodiment 2, as shown in fig. 4, one end of the first pipe 10 connected to the second pipe 20 is coaxial with the second pipe 20, and an elastic sealing ring 50 is disposed between the first pipe 10 and the second pipe 20, and the elastic sealing ring 50 is located at one side of the rotary connector 30.

In the pipe structure 100 provided in this embodiment, the elastic sealing ring 50 is disposed between the first pipe 10 and the second pipe 20, the elastic sealing ring 50 is annular, an annular end surface of one side of the elastic sealing ring 50 contacts with the second pipe 20, and an annular end surface of one side of the elastic sealing ring 50 contacts with the first pipe 10 and the rotary connector 30. By providing the elastic sealing ring 50, a sealing function can be achieved, and the possibility of fluid flowing out from the connection between the first pipeline and the second pipeline 20 and the connection between the rotary connector 30 and the second pipeline 20 is reduced. In addition, in the case where the spherical structure 310 and the concave structure 320 are provided, the elastic sealing ring 50 is compressed by the spherical structure 310, so that the relative twisting of the first pipe 10 and the second pipe 20 has a more sufficient moving space.

It should be noted that in some embodiments, the tube clamp 40 is clamped to the outer ring 32 and the second tube 20 and is not connected to the first tube 10, so that there is sufficient space for the first tube 10 and the second tube 20 to twist relative to each other on the side of the inner ring 31 away from the second tube 20. In the case that the pipe clamp 40 is connected to the first pipe 10, the elastic sealing ring 50 may be disposed between the rotary connector 30 and the second pipe 20, or an escape space may be disposed at a position of the pipe clamp 40 corresponding to the inner ring 31, so that the inner ring 31 has a sufficient moving space to be able to twist 32 relative to the outer ring.

Example 4

In any of the above embodiments, as shown in fig. 2, the end surface of the inner ring 31 on the side facing the second pipe 20 is flush with the end surface of the first pipe 10 on the side facing the second pipe 20.

By arranging the end surface of the inner ring 31 facing the second pipe 20 to be flush with the end surface of the first pipe 10 facing the second pipe 20, the entire end surface of the inner ring 31 facing the first pipe 10 is completely connected to the first pipe 10, so that a firmer fixing effect can be achieved. Meanwhile, the portion of the first pipe 10 extending into the second pipe 20 is limited, so that the possibility of interference between the first pipe 10 and the second pipe 20 during relative twisting of the first pipe 10 and the second pipe 20 can be reduced.

Example 5

In any of the above embodiments, as shown in fig. 2 and 5, the second pipe 20 includes a pipe body 21 and a flange 22 provided at an end of the pipe body 21; the flange 22 contacts the outer race 32 and the flange 22 is connected to the outer race 32 of the rotational connector 30 by a tube clamp 40.

The flange 22 and the pipe clamp 40 are arranged to cooperate, so that a more effective limiting effect can be achieved. Meanwhile, the pipe clamps are clamped on the end face, far away from the flange 22, of the outer ring 32 of the rotary connecting piece 30 and the end face, far away from the rotary connecting piece 30, of the flange 22, so that a good axial limiting effect can be achieved. The axial direction is the front-rear direction in fig. 2 and 5.

Example 6

In any of the above embodiments, as shown in fig. 3, the pipe clamp 40 includes a first pipe clamp 41 and a second pipe clamp 42, and the first pipe clamp 41 and the second pipe clamp 42 are connected by a bolt 43.

The pipe clamp 40 provided in this embodiment includes a first pipe clamp 41 and a second pipe clamp 42, and the first pipe clamp 41 and the second pipe clamp 42 are connected by a bolt 43. In some embodiments, one end of the first pipe clamp 41 and one end of the second pipe clamp 42 are rotatably connected, and the other end of the first pipe clamp 41 and the other end of the second pipe clamp 42 are connected by a bolt 43. In some embodiments, the first pipe clamp 41 and the second pipe clamp 42 are a split structure, one end of the first pipe clamp 41 and one end of the second pipe clamp 42 are connected by a bolt 43, and the other end of the first pipe clamp 41 and the other end of the second pipe clamp 42 are connected by a bolt 43. The pipe clamp 40 has a simple connection mode, is convenient to operate, and facilitates the assembly and disassembly of the first pipeline 10 and the second pipeline 20.

Example 7

In any of the above embodiments, as shown in fig. 1, the outer diameter of the first conduit 10 is smaller than the inner diameter of the second conduit 20.

By setting the outer diameter of the first pipe 10 to be smaller than the inner diameter of the second pipe 20, one end of the first pipe 10 can be extended into the second pipe 20 during the twisting process, so that the first pipe 10 and the second pipe 20 are twisted relatively.

In any of the above embodiments, as shown in fig. 4, the inner diameter of the first conduit 10 coincides with the inner diameter of the second conduit 20.

By setting the inner diameter of the first pipe 10 to be uniform with the inner diameter of the second pipe 20, it is possible to maintain the stability of the fluid flow in the pipe structure 100 and to improve the sealability of the connection of the first pipe 10 with the second pipe 20.

Example 8

In any of the above embodiments, as shown in fig. 2 and 5, the first pipeline 10 comprises a straight pipe section 11 and a bent pipe section 12 connected, and the straight pipe section 11 is connected with the second pipeline 20; the length L of the straight tube section 11 in the extending direction thereof is equal to or greater than the width W of the inner race 31.

The straight pipe section 11 is arranged to facilitate the installation of the rotating connecting piece 30, and meanwhile, the arrangement position of the rotating connecting piece 30 and the relative position of the rotating connecting piece 30 and the second pipeline 20 are more reasonable, so that the rotating connecting piece 30 is matched with the second pipeline 20 in a connecting mode. It will be appreciated that the central axis of the straight tube section 11 is disposed coaxially with the central axis of the second conduit 20.

Meanwhile, the relationship between the width W of the inner ring 31 and the length L of the straight pipe section 11 is reasonably set, so that the contact area between the inner ring 31 and the straight pipe section 11 is improved, and the connection stability is improved.

Some embodiments of the present application provide a boom conveying device 200.

Example 9

In some embodiments, as shown in fig. 6, the boom transport apparatus 200 includes: two arms 210 and a duct structure 100 as in any of the embodiments described above. Wherein, the two arm supports 210 are rotatably connected; each arm support 210 comprises a conveying pipe, and the conveying pipe of each arm support 210 and the correspondingly connected arm support 210 rotate coaxially; the ducts of the two arm supports 210 are connected by a pipe structure 100.

Further, the boom conveying device 200 includes a plurality of booms 210, and the pipeline structure 100 is disposed between two booms 210 that are relatively rotatably connected among the plurality of booms 210.

In some embodiments, as shown in fig. 6, the boom transport apparatus 200 includes a plurality of booms 210. The pipe structure 100 is disposed at the ends of the plurality of arm supports 210, and is configured to be connected to an external pipe rotatably connected to the arm supports 210.

The boom transportation device 200 provided in the above embodiment includes the pipeline structure 100 in any of the above embodiments, so that all the beneficial effects of any of the above embodiments are achieved, and no further description is given here.

Some embodiments of the present application provide a material conveying apparatus 300.

As shown in fig. 7, the material conveying equipment 300 includes the boom conveying device 200 in any of the embodiments.

The material conveying equipment 300 is a vehicle such as a fire truck and a concrete pump truck provided with the boom conveying device 200, and may also be engineering equipment such as a vehicle-mounted pump, a trailer pump and a mortar pump.

As shown in fig. 8, the material conveying apparatus 300 includes the pipeline structure 100 in any of the embodiments described above.

Wherein, material conveying equipment 300 includes stock solution equipment such as liquid reserve tank, liquid storage pot, and pipeline structure 100 links to each other with stock solution equipment.

The pipeline structure 100, the boom transportation device 200 and the material transportation equipment 300 provided by the present application are specifically described below by taking a concrete pump truck as an example.

At present, in the assembly process of the arm support 210, the elbow of the conveying pipe and the hinge of the arm support 210 are required to be coaxial, and due to the fact that factors such as welding errors of the arm support 210 or boring errors of the arm support 210 exist in actual production, the elbow and the straight pipe are not coaxial on the premise that the coaxiality of the elbow of the conveying pipe and the hinge of the arm support 210 is guaranteed, and after the two pipes are locked by using a pipe clamp, the phenomenon of 'strength building' at a joint is caused, and local stress is generated. The vibration of the arm support 210 is intensified, the abrasion of the conveying pipe is accelerated, and the service life is influenced.

To this end, one embodiment of the present application provides a piping structure 100.

The pipe structure 100 provided in this embodiment adopts a joint rotation connector (i.e., the rotation connector 30) to connect an elbow (one of the first pipe 10 and the second pipe 20) and a straight pipe (the other of the first pipe 10 and the second pipe 20), the inner ring 31 of the rotation connector 30 is connected with the elbow, the outer ring 32 is connected with the straight pipe, and concrete can pass through the inner ring 31 of the rotation connector 30; the bent pipe, the rotary connecting piece 30 and the straight pipe are fixed by adopting pipe clamps 40 such as pipe clamps; the bent pipe and the straight pipe can rotate relatively in any direction by rotating the connecting piece 30 at a small angle, so that the phenomenon of non-coaxial self-adaption is realized, and the local stress is eliminated.

Compared with the conveying pipe in the related art, the pipe structure 100 provided by the embodiment can omit the complex structures of pipe clamps in the related art, is suitable for the pipe clamps with simple structures, avoids excessive parts, simplifies the processing and assembling process, omits a connecting plate for connecting a body of the pipe clamp and a fixing clamp of the pipe clamp in the related art, and is beneficial to enlarging the assembling space of the pipe clamp. In addition, the phenomenon of different axes of the conveying pipes in any plane can be adjusted, and the problem of coaxiality of the connection of the straight pipe and the bent pipe can be improved by closing the valve.

Specifically, as shown in fig. 2, a curved pipe (the first pipe 10) is connected to the inner ring 31 of the articulation joint, and a straight pipe (the second pipe 20) is connected to the outer ring 32 of the articulation joint, and the whole structure is fixed by a pipe clamp.

Wherein, the elbow is specially made, a small section of straight part (namely, the straight pipe section 11) is reserved at the two ends of the elbow, and the length of the straight part is equal to the width of the inner ring 31 of the rotating connecting piece 30, so that the elbow can be just sleeved into the inner ring 31 of the rotating connecting piece 30. When the conveying pipe is assembled, the straight pipe, the joint rotating connecting piece and the pipe clamp are assembled in place, and then the bent pipe is sleeved into the inner ring 31 of the joint rotating connecting piece. The relative rotation of the small angle can be realized through rotating the connecting piece 30 between the bent pipe and the straight pipe, and when the straight pipe and the bent pipe are locked by the pipe clamp, even if the phenomenon that two conveying pipes are not coaxial due to machining errors and assembly errors occurs, the two conveying pipes can be automatically adapted without generating local stress due to the phenomenon of 'holding back'. Because the relative rotation angle range of the two pipes is required to be smaller, the protruding amount of the inner ring 31 of the rotary connecting piece 30 can be ensured to be smaller, and the 'plug flow' condition of concrete conveying cannot be damaged.

In some embodiments, the positions and thicknesses of the bent pipe and the straight pipe can be reversed.

In some embodiments, different forms of pipe clamps may be used.

In summary, the pipeline structure 100, the boom conveying device 200 and the material conveying equipment 300 provided in the embodiment at least have the following beneficial effects:

1) the coaxiality of the two conveying pipes is not forcibly ensured, but the two conveying pipes are adaptive to the relative angle;

2) the local stress generated by the phenomenon of 'holding back' at the joint of the conveying pipe is inhibited;

3) the inner race 31 of the rotating connector 30 has a small extension and does not disrupt the "plug flow" condition of concrete delivery.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A piping structure, comprising:

a first duct (10);

a second duct (20) interfacing with the first duct (10), the second duct (20) communicating with the first duct (10);

the rotary connecting piece (30) comprises an inner ring (31) and an outer ring (32), the inner ring (31) is fixedly sleeved on the first pipeline (10), and the outer ring (32) is movably connected with the inner ring (31);

a tube clamp (40) connected to the outer ring (32) and the second tube (20) for limiting relative movement of the first tube (10) and the second tube (20) in a mating direction.

2. The piping structure according to claim 1,

the surface of the inner ring (31) is a spherical structure (310), and the spherical structure (310) protrudes towards the outer ring (32);

the outer ring (32) is provided with a concave structure (320) matched with the spherical structure (310), and the spherical structure (310) is matched with the concave structure (320).

3. The piping structure according to claim 1,

the end surface of the inner ring (31) facing the second pipeline (20) is flush with the end surface of the first pipeline (10) facing the second pipeline (20).

4. The piping structure according to claim 1,

the first pipeline (10) with the one end that second pipeline (20) are connected with second pipeline (20) are coaxial, first pipeline (10) with be provided with elastic sealing ring (50) between second pipeline (20), elastic sealing ring (50) are located one side of rotating connecting piece (30).

5. The piping structure according to any one of claims 1 to 4,

the second pipeline (20) comprises a pipe body (21) and a flange (22) arranged at the end part of the pipe body (21);

the flange (22) is connected with the outer ring (32) of the rotating connecting piece (30) through the pipe clamp (40).

6. The piping structure according to any one of claims 1 to 4,

the pipe clamp (40) comprises a first pipe clamp (41) and a second pipe clamp (42), and the first pipe clamp (41) and the second pipe clamp (42) are connected through a bolt (43).

7. The piping structure according to any one of claims 1 to 4,

the outer diameter of the first pipe (10) is smaller than the inner diameter of the second pipe (20), or the inner diameter of the first pipe (10) is consistent with the inner diameter of the second pipe (20).

8. The piping structure according to any one of claims 1 to 4,

the first pipeline (10) comprises a straight pipe section (11) and a bent pipe section (12) which are connected, and the straight pipe section (11) is connected with the second pipeline (20);

the length of the straight pipe section (11) along the extending direction is larger than or equal to the width of the inner ring (31).

9. A boom conveying device is characterized by comprising:

a plurality of arm supports (210);

the piping structure (100) of any of claims 1 to 8;

the pipeline structure (100) is arranged between two relatively rotatably connected arm supports (210) in the plurality of arm supports (210), or the pipeline structure (100) is arranged at the tail ends of the plurality of arm supports (210).

10. A material conveying apparatus, comprising: the boom transport apparatus (200) of claim 9; or a pipe structure (100) according to any one of claims 1 to 8.

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