Floating pipeline and engineering vehicle

Abstract

The utility model relates to the technical field of pipeline connection, and provides a floating pipeline and an engineering vehicle. The floating pipeline comprises a fixed seat, a sleeve and an adjusting pipe. Wherein the sleeve is rotationally connected with the fixed seat. And the adjusting pipe is telescopically connected with the sleeve. The extending end, away from the adjusting pipe, of the sleeve is connected to the first hydraulic pipeline, and the extending end of the adjusting pipe is connected with the second hydraulic pipeline. According to the floating pipeline, axial and radial adjustment of the hydraulic pipeline can be achieved through cooperation between the adjusting pipe and the sleeve and cooperation between the sleeve and the fixing base, so that the risks of sealing failure, pipeline breakage and the like of the hydraulic pipeline can be reduced, and the reliability and stability of pipeline connection are improved.

Description

Technical Field

[0001] This application relates to the field of pipeline connection technology, and in particular to a floating pipeline and engineering vehicle. Background Technology

[0002] With the rapid development of electrification, construction machinery and equipment are gradually shifting towards electrification, and the application of electric drive axle technology in construction vehicles is becoming increasingly widespread. For electric pump trucks driven by electric drive axles, the hydraulic pumps used to drive the hydraulic actuators (pumping system and boom system) in the superstructure system are often located on the electric drive axle of the substructure system, and the hydraulic pumps are connected to the hydraulic actuators through hydraulic pipelines.

[0003] However, since the drive axle of engineering vehicles inevitably bounces during operation, these bounces may cause changes in the relative position of the hydraulic pump and hydraulic actuator connected to both ends of the hydraulic line, thereby causing risks such as sealing failure and line breakage of the hydraulic line. Utility Model Content

[0004] This application provides a floating pipeline and an engineering vehicle to solve the problem of hydraulic pipeline seal failure or pipeline breakage caused by positional fluctuations at both ends of the hydraulic pipeline.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] The first aspect of this application provides a floating pipeline, comprising: a fixed base; a sleeve rotatably connected to the fixed base; and an adjusting tube telescopically connected to the sleeve; wherein the end of the sleeve extending away from the adjusting tube is connected to a first hydraulic pipeline; and the end of the adjusting tube extending outward is connected to a second hydraulic pipeline.

[0007] As an alternative implementation, the sleeve is fitted over the regulating tube, and the regulating tube can move along the axial direction of the sleeve.

[0008] As an optional implementation, the sleeve and the fixed seat are rotatably connected by a bearing.

[0009] As an optional implementation, at least one seal is provided between the sleeve and the regulating tube.

[0010] As an optional implementation, the sleeve includes: a main body; a sealing part connected to the end of the main body, and an adjusting tube sliding along the inner wall of the sealing part; wherein the sealing element is disposed on the inner wall of the sealing part.

[0011] As an optional implementation, the inner wall of the sealing part is provided with at least one sealing groove, and the sealing elements are correspondingly disposed in the sealing groove.

[0012] As an alternative implementation, the sealing portion protrudes from the inner wall surface of the main body.

[0013] As an optional implementation, the end of the regulating tube located inside the sleeve is provided with a limiting part, which protrudes from the outer wall of the regulating tube and can abut against the sealing part.

[0014] As an optional implementation, the inner diameter of the sleeve is the same as the inner diameter of the first hydraulic line, and / or the inner diameter of the adjusting pipe is the same as the inner diameter of the second hydraulic line.

[0015] A second aspect of this application provides an engineering vehicle, comprising: a hydraulic actuator, a hydraulic pump, and a floating pipeline as described above; the hydraulic pump drives the hydraulic actuator; wherein a first hydraulic pipeline is connected to the hydraulic pump, and a second hydraulic pipeline is connected to the hydraulic actuator; or, the first hydraulic pipeline is connected to the hydraulic actuator, and the second hydraulic pipeline is connected to the hydraulic pump.

[0016] The floating pipeline and engineering vehicle provided in this application include a fixed base, a sleeve, and an adjusting pipe. The sleeve is rotatably connected to the fixed base, allowing the sleeve to rotate freely relative to the fixed base. The adjusting pipe is telescopically connected to the sleeve. The end of the sleeve extending away from the adjusting pipe is connected to a first hydraulic line, and the end of the adjusting pipe extending outwards is connected to a second hydraulic line.

[0017] This configuration allows for adjustment of axial changes in the hydraulic pipeline by regulating the expansion and contraction of the adjusting pipe relative to the sleeve. Simultaneously, the rotation of the sleeve relative to the fixed seat accommodates radial positional changes in the hydraulic pipeline, thus providing a certain adjustment range between the first and second hydraulic pipelines. When floating pipelines are applied to engineering vehicles, if the relative positions of the distant connecting ends of the first and second hydraulic pipelines change due to drive axle movement during vehicle operation, this can be compensated for by adjusting the expansion and contraction between the adjusting pipe and sleeve, as well as the rotation of the sleeve relative to the fixed seat. This reduces the risk of hydraulic pipeline seal failure and pipeline breakage, improving the reliability and stability of the engineering vehicle's operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A cross-sectional view of a floating pipeline provided in an embodiment of this application;

[0020] Figure 2This is a schematic diagram of the structure of the floating pipeline provided in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the structural frame of the engineering vehicle provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100-Drive axle;

[0024] 200-Hydraulic pump;

[0025] 300-Floating Piping;

[0026] 310 - Sleeve; 311 - Main body; 312 - Sealing part;

[0027] 320 - Regulating tube;

[0028] 330 - Mounting base; 340 - Bearing; 350 - Seal; 360 - First connecting flange; 370 - Second connecting flange;

[0029] 400 - Hydraulic actuator;

[0030] 500-wheel. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] With the rapid development of electrification, construction machinery and equipment are gradually shifting towards electrification, and the application of electric drive axle technology in construction vehicles is becoming increasingly widespread. For electric pump trucks driven by electric drive axles, the hydraulic pumps used to drive the hydraulic actuators (pumping system and boom system) in the superstructure system are often located on the electric drive axle of the substructure system and connected to the hydraulic actuators through hydraulic pipelines.

[0033] It should be noted that the underbody refers to the concrete pump truck's chassis and the mechanical structure related to its movement, primarily responsible for the overall movement and foundation support. The superstructure, on the other hand, refers to all functional equipment integrated into the top of the pump truck chassis, such as the power system, pumping mechanism, hydraulic system, boom system, and control unit modules. To shorten the power transmission path between the pump truck and the overall vehicle power system and reduce energy loss, the hydraulic pump is typically mounted on the chassis.

[0034] Because electric drive axles inevitably experience vibrations during operation, these vibrations can cause relative changes in the connection positions at both ends of the hydraulic lines, leading to risks such as seal failure and line breakage. Therefore, the hydraulic lines connecting the hydraulic pump and the hydraulic actuator must have a certain adjustment range.

[0035] In existing technologies, flexible pipe connections are typically used, and the pipe length is extended to compensate for positional changes at both ends of the pipe connection during travel. However, this approach not only results in an unsightly pipework but may also lead to static interference and dynamic wear issues.

[0036] In view of this, this application provides a floating pipeline, including a fixed base, a sleeve, and an adjusting pipe. The sleeve is rotatably connected to the fixed base, allowing the sleeve to rotate freely relative to the fixed base. The adjusting pipe is telescopically connected to the sleeve. The end of the sleeve extending away from the adjusting pipe is connected to a first hydraulic line, and the end of the adjusting pipe extending outwards is connected to a second hydraulic line.

[0037] This configuration allows for adjustment of axial changes in the hydraulic pipeline by regulating the expansion and contraction of the adjusting pipe relative to the sleeve. Simultaneously, the rotation of the sleeve relative to the fixed seat accommodates radial positional changes in the hydraulic pipeline, thus providing a certain adjustment range between the first and second hydraulic pipelines. When floating pipelines are applied to engineering vehicles, if the relative positions of the distant connecting ends of the first and second hydraulic pipelines change due to drive axle movement during vehicle operation, this can be compensated for by adjusting the expansion and contraction between the adjusting pipe and sleeve, as well as the rotation of the sleeve relative to the fixed seat. This reduces the risk of hydraulic pipeline seal failure and pipeline breakage, improving the reliability and stability of the engineering vehicle's operation.

[0038] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0039] Figure 1 This is a cross-sectional view of a floating pipeline provided in an embodiment of this application. Figure 2 This is a schematic diagram of the floating pipeline provided in an embodiment of this application. (Refer to...) Figure 1 and Figure 2 As shown, the floating pipeline 300 may include a sleeve 310, an adjusting pipe 320, and a fixing seat 330. The fixing seat 330 can be used to support the floating pipeline 300 and can be set at any position near the hydraulic pipeline formed by the first hydraulic pipeline and the second hydraulic pipeline, as long as it can provide stable support.

[0040] The sleeve 310 is rotatably connected to the fixed base 330, allowing the sleeve 310 to rotate freely relative to the fixed base 330. The adjusting tube 320 is telescopically connected to the sleeve 310. The end of the sleeve 310 extending away from the adjusting tube 320 is connected to the first hydraulic line, and the end of the adjusting tube 320 extending outwards is connected to the second hydraulic line.

[0041] It is understandable that the first hydraulic line and the second hydraulic line can be two segments of the same hydraulic line separated by the connecting floating line 300. Alternatively, the first hydraulic line and the second hydraulic line can be two different segments. Furthermore, the first hydraulic line and the second hydraulic line can be connected to different mechanisms to achieve fluid flow and transfer between them. For example, the first hydraulic line and the second hydraulic line can be connected to a hydraulic drive mechanism and a hydraulic actuator, respectively, to achieve fluid flow between the hydraulic drive mechanism and the hydraulic actuator.

[0042] It should be noted that the telescopic connection between the adjusting tube 320 and the sleeve 310 can be achieved in various ways, such as the cooperation between the slide rod and the sleeve, or by adopting a flexible connection design. No specific limitations are made here.

[0043] By setting the above floating pipe 300 in the hydraulic pipeline, the axial change in the hydraulic pipeline can be adjusted by adjusting the expansion and contraction of the pipe 320 relative to the sleeve 310. At the same time, the radial change in the hydraulic pipeline can also be adjusted by rotating the sleeve 310 relative to the fixed seat 330, so that there is a certain adjustment space between the first hydraulic pipeline and the second hydraulic pipeline.

[0044] When the floating pipeline 300 is applied to engineering vehicles, if the relative positions of the distant connecting ends of the first hydraulic pipeline and the second hydraulic pipeline change due to the movement of the drive axle during the operation of the engineering vehicle, the relative position between the adjusting pipe 320 and the sleeve 310 and the rotation of the sleeve 310 relative to the fixed seat 330 can be used to adapt to the change, thereby reducing the risk of hydraulic pipeline sealing failure, pipeline breakage and other situations, and improving the reliability and stability of the engineering vehicle operation.

[0045] The following provides a detailed description of the specific structure of floating pipelines and various possible implementation methods.

[0046] like Figure 1 As shown, the sleeve 310 is fitted over the adjusting tube 320, and the adjusting tube 320 can move axially along the sleeve 310. In this way, the axial distance between the first hydraulic line and the second hydraulic line can be adjusted by extending and retracting the adjusting tube 320 along the sleeve 310.

[0047] The connection method between the sleeve 310 and the first hydraulic pipeline, and the connection method between the regulating pipe 320 and the second hydraulic pipeline, can be a flange connection, a threaded connection, a clamp connection, or a grooved connection. No specific connection method is specified here.

[0048] When the pipe connection method is flange connection, such as Figure 1 As shown, the sleeve 310 can be connected to the first hydraulic line via the first connecting flange 360. The adjusting pipe 320 can be connected to the second hydraulic line via the second connecting flange 370, thereby achieving a stable connection between the floating pipe 300 and the first and second hydraulic lines.

[0049] In some embodiments, the inner diameter of the sleeve 310 can be the same as the inner diameter of the first hydraulic line, and the inner diameter of the adjusting pipe 320 can be the same as the inner diameter of the second hydraulic line. This ensures smooth flow of liquid within the floating line 300 and reduces flow resistance. Maintaining consistent inner diameters also helps maintain pressure stability in the hydraulic system.

[0050] Continue to refer to Figure 1 As shown, at least one sealing element 350 may be provided between the sleeve 310 and the regulating pipe 320. The sealing element 350 may be a sealing ring, an oil seal, or a mechanical seal. Furthermore, the number of sealing elements 350 can be selected according to specific application requirements.

[0051] For example, in low-pressure applications, a single seal 350 can be used to save costs. However, in high-pressure applications, a combination of multiple seals 350 can be used to ensure a good seal under high pressure, enhance sealing performance, and improve reliability. No restrictions are placed on the type or number of seals 350.

[0052] By providing a seal 350 between the relatively movable sleeve 310 and the regulating pipe 320, the system efficiency can be reduced and energy consumption increased due to leakage of low-pressure fluid or high-pressure fluid (such as hydraulic oil).

[0053] In one embodiment, the sleeve 310 may include a main body 311 and a sealing part 312. The sealing part 312 is connected to the end of the main body 311, and the adjusting tube 320 can slide along the inner wall of the sealing part 312. This arrangement allows the adjusting tube 320 to contact only the inner wall surface of the sealing part 312, while maintaining a gap with the inner wall surface of the main body 311. This reduces the contact area between the adjusting tube 320 and the sleeve 310, thus reducing wear on the inner wall of the sleeve 310.

[0054] Specifically, the inner wall of the sealing part 312 may be provided with at least one sealing groove, which can be used to accommodate the sealing element 350, with each sealing element 350 correspondingly disposed within the sealing groove. Furthermore, the sealing part 312 protrudes from the inner wall surface of the main pipe 311, thereby enabling preferential contact between the outer wall of the regulating pipe 320 and the inner wall of the sealing part 312. It is understood that the sealing part 312 and the regulating pipe 320 may be made of wear-resistant materials to improve the reliability of the floating pipeline 300.

[0055] Furthermore, a seal 350 is disposed on the inner wall of the sealing portion 312. This arrangement allows the seal 350 to fill the gap between the regulating pipe 320 and the sealing portion 312 through elastic deformation, effectively preventing leakage of low-pressure or high-pressure fluids (such as hydraulic oil). Additionally, the seal 350 preferentially absorbs frictional losses, protecting the surfaces of the regulating pipe 320 and the sleeve 310 from direct wear.

[0056] It is understood that the sealing part 312 can be integrally formed with the main body 311, or it can be fixedly connected to the end of the main body 311 (such as by welding, threaded connection, or snap-fit). Furthermore, the sealing part 312 and the main body 311 can be made of different materials to adapt to the needs of different working environments. No specific limitations are made here.

[0057] For example, one end of the regulating pipe 320 located inside the sleeve 310 may be provided with a limiting portion (not shown). The limiting portion protrudes from the outer wall of the regulating pipe 320 and abuts against the sealing portion 312. During the movement of the regulating pipe 320 relative to the sleeve 310, the outer wall surface of the limiting portion of the regulating pipe 320 does not contact the inner wall of the main pipe body 311 and can move axially along the sleeve 310 until the end face of the limiting portion on the regulating pipe 320 abuts against the end face of the sealing portion 312, thereby preventing the regulating pipe 320 from falling out of the sleeve 310 and causing hydraulic oil leakage. Furthermore, since the limiting portion of the regulating pipe 320 does not contact the main pipe body 311, it does not affect the movement of the regulating pipe 320 relative to the sleeve 310.

[0058] Reference Figure 2 As shown, the sleeve 310 is rotatably connected to the fixed base 330, so that the sleeve 310 can drive the entire floating pipeline 300 to swing relative to the fixed base 330, thereby adjusting the possible radial offset between the first hydraulic pipeline and the second hydraulic pipeline.

[0059] It is understandable that the sleeve 310 can be rotatably connected to the fixed seat 330 in a variety of ways, such as bearing connection, rotating pair connection, spherical hinge connection or crank-connecting rod mechanism connection, and no limitation is made on its connection method here.

[0060] In some embodiments, such as Figure 2As shown, the sleeve 310 and the fixed base 330 are rotatably connected via a bearing 340. The bearing 340 has an inner ring and an outer ring. The outer ring is mounted on the fixed base 330, and the inner ring can rotate relative to the outer ring. The sleeve 310 is connected to the inner ring and can rotate with it. The bearing 340 can be of various types, such as a spherical plain bearing or a rolling bearing, and no limitation is made here.

[0061] In other embodiments, the sleeve 310 can be hinged to the fixed base 330. For example, a pin can be rotatably connected to the fixed base 330, and a hole or bearing seat that mates with the pin can be provided on the sleeve 310. The sleeve 310 is fitted onto the pin through the hole or bearing seat, forming a hinge. When it is necessary to limit the rotation angle to avoid interference with other structures, a limiting device can also be provided on the fixed base 330 or the sleeve 310.

[0062] Figure 3 A schematic diagram of the structural frame of the engineering vehicle provided in an embodiment of this application. (Refer to...) Figure 3 As shown in the figure, this application embodiment also provides an engineering vehicle, which includes a hydraulic actuator 400, a hydraulic pump 200, and a floating pipeline 300.

[0063] The hydraulic pump 200 can drive the hydraulic actuator 400 to work, and the floating pipeline 300 can be connected between the hydraulic pump 200 and the hydraulic actuator 400.

[0064] For example, the first hydraulic line can be connected to the hydraulic pump 200, and the second hydraulic line can be connected to the hydraulic actuator 400. Alternatively, the first hydraulic line can be connected to the hydraulic actuator 400, and the second hydraulic line can be connected to the hydraulic pump 200. The appropriate choice can be made based on the actual situation.

[0065] Furthermore, the engineering vehicle may also include a drive axle 100 and wheels 500. Wheels 500 are connected to both sides of the drive axle 100, and the drive axle 100 can drive the wheels 500 to rotate. It should be noted that the drive axle 100 may include a fuel-powered drive axle and an electric drive axle; no specific limitations are made here.

[0066] It is understandable that when the engineering vehicle is a pump truck, the hydraulic actuator 400 may include a boom system and a pumping system. The hydraulic actuator 400 of other engineering vehicles is its corresponding hydraulic actuator element, which will not be described in detail here.

[0067] For example, taking an electric pump truck driven by an electric drive axle as an example, the hydraulic pump 200 can obtain power through the power take-off (PTO) port of the electric drive axle in the lower structure, and provide pressurized oil to the hydraulic actuators 400 such as the boom system and pumping system in the upper structure, so as to drive the pumping and boom movements.

[0068] Specifically, one of the hydraulic pump 200 and the hydraulic actuator 400 can be connected to the sleeve 310, and the other can be connected to the regulating pipe 320. For example, the hydraulic pump 200 can be connected to the sleeve 310, and the hydraulic actuator 400 can be connected to the regulating pipe 320. Alternatively, the hydraulic pump 200 can be connected to the regulating pipe 320, and the hydraulic actuator 400 can be connected to the sleeve 310.

[0069] This configuration allows for adjustment and adaptation to changes in the axial position of the first and second hydraulic lines via the floating pipeline 300. The floating pipeline 300 connects the hydraulic pump 200 and the hydraulic actuator 400. Furthermore, the adjusting pipe 320 within the floating pipeline 300 can move axially relative to the sleeve 310. When the floating pipeline 300 is applied to the hydraulic system of an engineering vehicle, if the drive axle 100 bounces during vehicle operation, the extension and retraction of the adjusting pipe 320 relative to the sleeve 310 can accommodate changes in the axial position of the two ends of the hydraulic pipeline connection.

[0070] Furthermore, a mounting base 330 can be installed on the frame of the engineering vehicle. The mounting base 330 can be installed at any position on the frame, as long as it is between the hydraulic pump 200 and the hydraulic actuator 400. Additionally, the sleeve 310 can rotate relative to the mounting base 330.

[0071] In this way, when the drive axle 100 bounces, causing a change in the radial relative position of the hydraulic pump 200 pipeline and the hydraulic actuator 400 pipeline, the radial bounce caused by the drive axle 100 can be compensated by the rotation of the sleeve 310 relative to the frame. At the same time, combined with the axial movement of the adjusting pipe 320 in the sleeve 310 relative to the sleeve 310, the axial bounce caused by the drive axle 100 can also be compensated, thus meeting the degree of freedom requirements, avoiding rigid damage to the pipeline, and reducing the risk of hydraulic pipeline sealing failure, pipeline breakage, etc., thereby improving the reliability and stability of the engineering vehicle operation.

[0072] In some embodiments, the sleeve 310 may be connected to the hydraulic pipeline of the hydraulic pump 200, and the adjusting pipe 320 may be connected to the hydraulic pipeline of the hydraulic actuator 400. It is understood that the hydraulic pipeline of the hydraulic pump 200 may be a first hydraulic pipeline or a pipeline connected to the first hydraulic pipeline, and the hydraulic pipeline of the hydraulic actuator 400 may be a second hydraulic pipeline or a pipeline connected to the second hydraulic pipeline.

[0073] Specifically, the hydraulic pipes of the hydraulic pump 200 and the hydraulic actuator 400 can be rubber hoses, which gives the connecting pipes good flexibility, adapts to different installation positions and spatial layouts, and can be bent and twisted without easily breaking.

[0074] Because the inner diameter of the sleeve 310 is slightly larger than that of the regulating pipe 320, this design allows for a relatively larger outlet connection pipe diameter for the hydraulic pump 200, thereby reducing local flow resistance and lowering the initial pressure drop. Conversely, the relatively smaller pipe diameter at the end connected to the hydraulic actuator 400 allows subsequent pipe sections to maintain the high-pressure flow velocity, balancing frictional resistance and system efficiency, and reducing overall energy consumption. Furthermore, the larger pipe diameter at the pump end reduces the initial flow velocity and the rate of inner wall wear. The smaller pipe diameter at the end, combined with wear-resistant material, accommodates the long-term operation requirements of the high-pressure section.

[0075] The working process of this application embodiment is as follows:

[0076] When the engineering vehicle is in motion, the relative position of the pipelines of the hydraulic pump 200 and the hydraulic actuator 400 may change due to the movement of the drive axle 100. In this case, the floating pipeline 300 connected between the two can be used to adjust and adapt to the relative position change.

[0077] Specifically, radial runout of the drive axle 100 can be compensated by the rotation or oscillation of the sleeve 310 in the floating pipeline 300 relative to the vehicle frame. Axial runout of the drive axle 100 can be compensated by the expansion and contraction of the adjusting pipe 320 in the floating pipeline 300 relative to the sleeve 310, thus minimizing the impact of drive axle 100 runout and ensuring the reliability and stability of the vehicle's operation. Furthermore, the pipeline in this embodiment requires no pre-reserved length, is compactly arranged, and avoids static interference. Simultaneously, the floating pipeline 300 can be used for all oil circuit connections with relative positional changes, offering strong versatility.

[0078] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0079] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0080] It should be readily understood that the terms “on,” “above,” and “on top of” in this application should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0081] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A floating pipe, characterized in that include: Fixed base; A sleeve, which is rotatably connected to the fixed base; An adjusting tube, wherein the adjusting tube is retractably connected to the sleeve; Wherein, the end of the sleeve extending away from the adjusting tube is connected to the first hydraulic line; and the end of the adjusting tube extending out is connected to the second hydraulic line.

2. The floating line of claim 1, wherein, The sleeve is fitted over the adjusting tube, and the adjusting tube can move along the axial direction of the sleeve.

3. The floating line of claim 1, wherein, The sleeve and the fixed base are rotatably connected by a bearing.

4. The floating pipe line according to any one of claims 1-3, characterized in that, At least one seal is provided between the sleeve and the regulating tube.

5. The floating line of claim 4, wherein, The sleeve includes: Supervisory body; A sealing part is connected to the end of the main body, and the adjusting tube slides along the inner wall of the sealing part; The sealing element is disposed on the inner wall of the sealing part.

6. The floating line of claim 5, wherein, The inner wall of the sealing part is provided with at least one sealing groove, and the sealing element is provided in the sealing groove one by one.

7. The floating line of claim 5, wherein, The sealing part protrudes from the inner wall surface of the main body.

8. The floating line of claim 7, wherein, The regulating tube is provided with a limiting part at one end inside the sleeve. The limiting part protrudes from the outer wall of the regulating tube and can abut against the sealing part.

9. The floating pipe line according to any one of claims 1-3, characterized in that The inner diameter of the sleeve is the same as the inner diameter of the first hydraulic line, and / or the inner diameter of the adjusting pipe is the same as the inner diameter of the second hydraulic line.

10. An engineering vehicle characterized by, include: A hydraulic actuator, a hydraulic pump, and a floating pipeline as described in any one of claims 1-9; the hydraulic pump drives the hydraulic actuator; Wherein, the first hydraulic line is connected to the hydraulic pump, and the second hydraulic line is connected to the hydraulic actuator; or... The first hydraulic line is connected to the hydraulic actuator, and the second hydraulic line is connected to the hydraulic pump.

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