A rear axle steering coiled tubing operation drum semi-trailer

Abstract

The application provides a rear axle steering continuous pipe operation roller semi-trailer. The semi-trailer comprises a frame, a roller arranged on the frame, a rear axle assembly and a rear axle steering mechanism. The rear axle steering mechanism comprises an upper support seat, a rotary disc bearing, a lower support seat and a steering driving assembly. The steering driving assembly and the upper support seat are arranged on the frame, the rotary disc bearing is connected with the upper support seat and the lower support seat respectively, and the lower support seat is fixedly connected with the rear axle assembly. The steering driving assembly is connected with the lower support seat to drive the lower support seat to rotate relative to the upper support seat and drive the rear axle assembly to rotate. The rear axle assembly is steered by adopting the steering driving mechanism to drive the lower support seat. The relative rotation angle between the frame and the wheel is large, the turning radius of the semi-trailer is reduced, the reliability of the steering driving is improved, the safety of the whole vehicle is improved, and the driving strength of the vehicle is reduced.

Description

Technical Field

[0001] This invention relates to a rear-axle steering continuous tube working roller semi-trailer. Background Technology

[0002] With the increasing maturity of coiled tubing operation technology in China, the demand for coiled tubing technology and equipment is also constantly increasing. Coiled tubing operations offer advantages such as fewer personnel required, high speed, high efficiency, and environmental friendliness, making them an indispensable operational technology in the development of numerous oil and gas fields. The number of coiled tubing operation equipment in use and the amount of maintenance required in various oil and gas fields are also steadily increasing. With the continuous development of oil and gas resources, the application areas of coiled tubing operations are constantly expanding, and the requirements for pipe diameter and length are becoming increasingly stringent. The maximum capacity of the drums that can be transported by vehicle-mounted coiled tubing operation equipment is 2”-6600m; therefore, the transportation challenges for coiled tubing exceeding 2”-6600m will become increasingly urgent.

[0003] Currently, rear-axle steering semi-trailers are mainly used in logistics applications such as heavy-duty transport. Therefore, using rear-axle steering semi-trailers for roller transport has become a development direction for continuous pipe operation equipment. The steering structure of existing rear-axle steering semi-trailers is typically a steering linkage mechanism. This mechanism enables rear-axle steering, allowing for differentiated control of the steering angles of each axle tire, resulting in less tire wear during cornering. Therefore, it is widely used. Summary of the Invention

[0004] The inventors have discovered that existing semi-trailers using a steering linkage mechanism to achieve rear-axle steering have complex steering linkage structures, requiring a load-bearing steering axle to achieve steering. This results in high production costs for the semi-trailers, complex steering linkage transmission, high requirements for connection and transmission, and poor reliability. Furthermore, due to the limitations of the suspension and leaf springs, the wheel steering space is small, and the relative turning angle between the frame and wheels is small, thus increasing the overall width and turning radius of the vehicle. In view of the above problems, this invention proposes a rear-axle steering continuous tube roller semi-trailer to solve or partially solve these problems. The technical solution proposed by this invention is as follows:

[0005] This invention provides a rear-axle steering continuous pipe working roller semi-trailer, including: a frame, and rollers, a rear axle assembly and a rear axle steering mechanism disposed on the frame;

[0006] The rear axle steering mechanism includes an upper support seat, a turntable bearing, a lower support seat, and a steering drive assembly;

[0007] The steering drive assembly and the upper support seat are mounted on the vehicle frame, the turntable bearing is connected to the upper support seat and the lower support seat respectively, and the lower support seat is fixedly connected to the rear axle assembly;

[0008] The steering drive assembly is connected to the lower support seat to drive the lower support seat to rotate relative to the upper support seat, thereby causing the rear axle assembly to rotate.

[0009] In one or more alternative embodiments, the turntable bearing includes an outer ring and an inner ring.

[0010] The inner ring of the bearing is fixedly connected to the upper support seat, and the outer ring of the bearing is fixedly connected to the lower support seat.

[0011] In one or more alternative embodiments, the steering drive assembly includes a first steering hydraulic cylinder and a second steering hydraulic cylinder;

[0012] Two first steering hydraulic cylinder fixing parts are symmetrically arranged on both sides of the vehicle frame, and the cylinder bodies of the first steering hydraulic cylinder and the second steering hydraulic cylinder are respectively connected to the first steering hydraulic cylinder fixing parts.

[0013] Two second steering hydraulic cylinder fixing parts are symmetrically arranged on the lower support base, and the piston rods of the first steering hydraulic cylinder and the second steering hydraulic cylinder are respectively connected to the first steering hydraulic cylinder fixing part.

[0014] In one or more optional embodiments, the rear-axle steering continuous pipe working roller semi-trailer further includes: a power mechanism connected to the first steering hydraulic cylinder and the second steering hydraulic cylinder to drive the first steering hydraulic cylinder and the second steering hydraulic cylinder to extend and retract.

[0015] In one or more alternative embodiments, the power mechanism includes a first hydraulic pump;

[0016] The first hydraulic pump is connected to the hydraulic circuits of the first steering hydraulic cylinder and the second steering hydraulic cylinder.

[0017] In one or more alternative embodiments, the frame is provided with a roller support, and the roller is hinged to the roller support.

[0018] In one or more alternative embodiments, the roller includes a base with a rotating shaft, and the roller support includes an upper mounting base and a lower mounting base;

[0019] The lower mounting base is fixed to the vehicle frame, the upper mounting base is detachably connected to the lower mounting base, and the rotating shaft is rotatably disposed within the receiving cavity of the upper mounting base and the lower mounting base.

[0020] In one or more alternative embodiments, the rear-axle steering continuous pipe working roller semi-trailer further includes a roller lifting mechanism;

[0021] The roller lifting mechanism is located at the end of the frame away from the roller support seat to drive the roller to move up and down along the roller support seat.

[0022] In one or more optional embodiments, the roller lifting mechanism includes a first lifting hydraulic cylinder and a second lifting hydraulic cylinder;

[0023] Two first lifting hydraulic cylinder fixing parts are symmetrically arranged on both sides of the frame, and the cylinder bodies of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder are respectively connected to the first lifting hydraulic cylinder fixing parts.

[0024] Two second lifting hydraulic cylinder fixing parts are symmetrically arranged on the base, and the piston rods of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder are respectively connected to the second lifting hydraulic cylinder fixing parts.

[0025] In one or more alternative embodiments, the power mechanism includes a second hydraulic pump, a four-way directional valve, and four one-way throttle valves;

[0026] The second hydraulic pump is connected to the hydraulic circuits of the first and second lifting hydraulic cylinders via the four-way directional valve.

[0027] The outlet of the four-way reversing valve is connected to the inlet of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder, and the inlet of the four-way reversing valve is connected to the outlet of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder.

[0028] The four one-way throttle valves are respectively connected to the inlet and outlet ends of the first and second lifting hydraulic cylinders.

[0029] In one or more optional embodiments, the power mechanism further includes a pressure regulating valve connected between the second hydraulic pump and the four-way directional valve to detect the pump fluid pressure of the hydraulic pump.

[0030] In one or more optional embodiments, it further includes: a roller rotation support mechanism;

[0031] The roller rotation support mechanism includes a rotation support frame and a rotation support frame drive mechanism;

[0032] The rotating support frame drive mechanism is configured to drive the rotating support frame to be positioned below the base to support the base.

[0033] In one or more alternative embodiments, the rotary support drive mechanism includes a rotary support hydraulic cylinder;

[0034] The frame is provided with a first rotary support hydraulic cylinder fixing part, and the cylinder body of the rotary support hydraulic cylinder is connected to the first rotary support hydraulic cylinder fixing part;

[0035] The rotating support frame is provided with a second rotating support hydraulic cylinder fixing part, and the piston rod of the rotating support hydraulic cylinder is connected to the second rotating support hydraulic cylinder fixing part.

[0036] In one or more alternative embodiments, the power mechanism includes a third hydraulic pump;

[0037] The third hydraulic pump is connected to the hydraulic circuit of the rotary support hydraulic cylinder.

[0038] In one or more optional embodiments, the rotating support frame includes a rotating support base, a support plate, and a support beam. The rotating support base is hinged to the vehicle frame, and the support beam connects the rotating support base and the support plate respectively. The second rotating support hydraulic cylinder fixing part is disposed on the support beam.

[0039] The support plate is configured to abut against the base when the rotating support frame supports the base.

[0040] In one or more optional embodiments, the roller further includes a roller body and an oil collection tray, the roller body being fixed to the base and the oil collection tray being disposed below the base.

[0041] In one or more alternative embodiments, the roller further includes a pipe manifold, a power transmission system, and a manifold; the pipe manifold and the manifold are respectively disposed on both sides of the roller body, and the power transmission system is connected to the pipe manifold.

[0042] In one or more alternative embodiments, the frame is a monocoque frame; the frame further includes hydraulic outriggers fixed to the front of the frame.

[0043] In one or more alternative embodiments, the frame includes a front frame, a rear frame, and frame connecting beams;

[0044] The front frame and the rear frame are fixedly connected by the frame connecting beam;

[0045] The upper support seat is fixed to the bottom of the rear frame;

[0046] The roller is fixed to the front frame.

[0047] In one or more alternative embodiments, the power mechanism further includes an electric motor to drive at least one of the first hydraulic pump, the second hydraulic cylinder, and the third hydraulic cylinder.

[0048] Based on the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows:

[0049] The rear-axle steering continuous pipe working roller semi-trailer provided in this invention realizes the rear axle steering function through the rear axle drive mechanism, which can meet the transportation requirements of continuous pipes of 2”-6600m or more. By sequentially connecting the frame, upper support seat, turntable bearing, lower support seat and rear axle assembly, the steering mechanism drives the lower support seat to realize the steering of the rear axle assembly. During the steering process, there is no interference or restriction from the wheels and suspension. The relative turning angle between the frame and the wheels is large, which reduces the turning radius of the semi-trailer and saves steering space. This allows for a reduction in the overall vehicle width and size, thus lowering production and manufacturing costs. Furthermore, the rear axle drive mechanism has a simple structure. Compared with the prior art, it does not require a complex transmission mechanism, which improves the reliability of the steering drive, enhances the overall vehicle safety, and reduces the driving intensity.

[0050] The rear-axle steering continuous pipe operation roller semi-trailer provided in this embodiment of the invention uses a rear axle drive mechanism to achieve rear axle steering. Compared with vehicles that use steering linkage mechanisms in the prior art, the chassis does not need to use a load-bearing steering axle chassis. The chassis only needs to meet the load-bearing requirements of the rear axle drive mechanism, which reduces the difficulty of chassis manufacturing and further reduces manufacturing costs.

[0051] The rear-axle steering continuous pipe operation roller semi-trailer provided in this embodiment of the invention achieves the hinge connection between the roller and the frame through the roller support seat. The roller lifting mechanism drives the roller to lift and lower with the roller support seat as the fulcrum. Lifting the roller by the roller lifting mechanism can increase the gap between the roller and the ground, enhance the semi-trailer's ability to pass through obstacle roads. Furthermore, after the roller is lifted, the center of gravity of the roller moves forward, increasing the adhesion of the tractor's drive axle, improving the climbing ability, and reducing transportation costs. It can meet the needs of both roller transportation and on-site operation, and can meet the transportation needs of continuous pipes of 2”-6600m and above in shale gas areas with complex terrain.

[0052] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0053] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0054] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0055] Figure 1 A schematic diagram of the structure of the rear-axle steering continuous tube working roller semi-trailer provided in an embodiment of the present invention. Figure 1 ;

[0056] Figure 2 for Figure 1 The diagram shows a partial structural diagram of part I of the rear axle steering continuous tube working roller semi-trailer.

[0057] Figure 3 A schematic diagram of the structure of the rear-axle steering continuous tube working roller semi-trailer provided in an embodiment of the present invention. Figure 2 ;

[0058] Figure 4 A schematic diagram of the structure of the rear-axle steering continuous tube working roller semi-trailer provided in an embodiment of the present invention. Figure 3 ;

[0059] Figure 5 for Figure 4 The diagram shows a cross-section of the rear axle steering mechanism of the rear axle steering continuous tube working roller semi-trailer shown in the AA direction.

[0060] Figure 6 for Figure 1 The diagram shows a partial structural schematic of a rear-axle steering continuous tube working roller semi-trailer.

[0061] Figure 7 for Figure 1 The diagram shows the structural structure of the chassis of the rear axle steering continuous tube working roller semi-trailer.

[0062] Figure 8 for Figure 1 The diagram shows the structural schematic of the power mechanism of the rear axle steering continuous tube working roller semi-trailer.

[0063] Figure 9A and Figure 9B for Figure 1 The diagram shows the structure of the drum of the rear axle steering continuous tube working drum semi-trailer.

[0064] Figure 10 for Figure 1 The diagram shows the hydraulic circuit structure of the drive drum lifting mechanism of the rear axle steering continuous tube working drum semi-trailer.

[0065] in:

[0066] 1. Frame, 101 Roller Support, 1011 Upper Mounting Mount, 1012 Lower Mounting Mount, 102 Frame Connecting Beam, 103 First Lifting Hydraulic Cylinder 701 Fixing Part, 104 Rotary Support Frame Fixing Part, 105 First Rotary Support Hydraulic Cylinder Fixing Part, 106 First Steering Hydraulic Cylinder Fixing Part, 107 Rear Frame, 108 Hydraulic Outrigger, 109 Front Frame; 2. Power Mechanism, 201 Electric Motor, 202 Hydraulic Oil Tank, 203 Filter, 204 Hydraulic Pump; 3. Roller, 301 Power Transmission System, 302 Pipe Arrangement, 303 Roller Body, 304 Manifold, 305 Base, 3051 Rotary Shaft, 306 Oil Collection Pan; 4. Rear Axle Assembly; 5. Rear Axle Steering Mechanism, 501 Upper Support, 502 Turntable Bearing, 503 Lower Support, 504 Steering Drive Assembly, 5 041 First steering hydraulic cylinder, 5042 Second steering hydraulic cylinder; 6 Roller rotation support mechanism, 601 Rotary support frame, 6011 Rotary support seat, 6012 Support plate, 6013 Support beam, 6014 Second rotating support hydraulic cylinder fixing part, 602 Rotary support frame drive mechanism, 6021 Rotary support hydraulic cylinder; 7 Roller lifting mechanism; 8 Guardrail; 9 Fire extinguisher box; 10 Loading ladder; 11 Spare tire; 12 Tool box; 13 Spare tire crane. Detailed Implementation

[0067] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0068] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0069] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0071] This invention provides a rear-axle steering continuous tube working roller semi-trailer, referring to... Figures 1-5 As shown, the rear axle steering continuous pipe working roller semi-trailer includes: a frame 1, and rollers 3, a rear axle assembly 4, and a rear axle steering mechanism 5 disposed on the frame 1;

[0072] The rear axle steering mechanism 5 includes an upper support 501, a turntable bearing 502, a lower support 503, and a steering drive assembly 504;

[0073] The steering drive assembly 504 and the upper support seat 501 are disposed on the vehicle frame 1, the turntable bearing 502 is connected to the upper support seat 501 and the lower support seat 503 respectively, and the lower support seat 503 is fixedly connected to the rear axle assembly 4;

[0074] The steering drive assembly 504 is connected to the lower support 503 to drive the lower support 503 to rotate relative to the upper support 501, thereby causing the rear axle assembly 4 to rotate.

[0075] The rear axle assembly 4 described in this embodiment of the invention may include structures such as axles, tires, wheel rims, and suspension. The suspension may be a leaf spring balance suspension. The specific implementation method can be referred to the detailed description in the prior art. The specific structural form of the rear axle assembly 4 is not specifically limited in this embodiment of the invention.

[0076] In this embodiment of the invention, the frame 1 is a frame-type frame, which can adopt the load-bearing axle in the prior art. The frame 1 is connected to the rear axle assembly 4 through the rear axle steering mechanism 5. The steering drive component 504 acts on the turntable bearing 502 to realize the relative rotation between the frame 1 and the rear axle assembly 4, thereby realizing the rear axle steering of the semi-trailer.

[0077] Reference Figure 7 As shown, the frame 1 includes a front frame 109, a rear frame 107, and a frame connecting beam 102; the front frame 109 and the rear frame 107 are fixedly connected by the frame connecting beam 102; the upper support seat 501 is fixed to the bottom of the rear frame 107; and the roller 3 is fixed to the front frame 109.

[0078] In this embodiment of the invention, the turntable bearing 502 may include an outer bearing ring and an inner bearing ring; the inner bearing ring is fixedly connected to the upper support seat 501, and the outer bearing ring is fixedly connected to the lower support seat 503.

[0079] In one specific embodiment, in the rear axle steering mechanism 5, the upper support 501 and the inner ring of the turntable bearing 502 are bolted together, and the lower support 503 and the outer ring of the turntable bearing 502 are bolted together. Of course, in this embodiment of the invention, the fixed connection method between the inner ring of the bearing and the upper support 501, and between the outer ring of the bearing and the lower support 503, can refer to the detailed description in the prior art, and is not specifically limited here.

[0080] In one embodiment, refer to Figure 5 and Figure 7 As shown, the steering drive assembly 504 may include: a first steering hydraulic cylinder 5041 and a second steering hydraulic cylinder 5042.

[0081] Two first steering hydraulic cylinder fixing parts 106 are symmetrically arranged on both sides of the frame 1. The cylinder bodies of the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042 are respectively connected to the first steering hydraulic cylinder fixing parts 106.

[0082] Two second steering hydraulic cylinder fixing parts (not shown in the figure) are symmetrically arranged on the lower support 503. The piston rods of the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042 are respectively connected to the second steering hydraulic cylinder fixing parts.

[0083] Reference Figure 7As shown, the first steering hydraulic cylinder fixing part 106 mentioned above can be a first steering hydraulic cylinder lug (not shown in the figure) provided on the frame 1. The first steering hydraulic cylinder lug is fixed to the rear side beam web of the frame 1. Correspondingly, the cylinder bodies of the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042 are provided with steering hydraulic cylinder body lugs (not shown in the figure). The steering hydraulic cylinder body lugs are connected to the first steering hydraulic cylinder lugs by a pin.

[0084] Correspondingly, the aforementioned second steering hydraulic cylinder fixing part can be a second steering hydraulic cylinder lug (not shown in the figure) provided on the lower support frame. Correspondingly, the piston rod ends of the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042 are provided with steering hydraulic cylinder piston rod lugs (not shown in the figure), and the steering hydraulic cylinder piston rod lugs and the second steering hydraulic cylinder lugs are connected by a pin.

[0085] In this embodiment of the invention, the extension and retraction of the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042 drive the lower support frame to rotate, thereby causing the relative rotation between the vehicle frame 1 and the rear axle assembly 4. For example, when it is necessary to push the lower support frame to rotate in the forward direction, the piston rod of the first steering hydraulic cylinder 5041 can be extended and the piston rod of the second steering hydraulic cylinder 5042 can be retracted. The forward rotation of the lower support frame is achieved by pushing and pulling the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042. When it is necessary to push the lower support frame to rotate in the reverse direction, the piston rod of the first steering hydraulic cylinder 5041 can be retracted and the piston rod of the second steering hydraulic cylinder 5042 can be extended. Of course, in other embodiments, the piston rod of the first steering hydraulic cylinder 5041 can be extended while the piston rod of the second steering hydraulic cylinder 5042 can be retracted to achieve reverse rotation of the lower support frame, while the piston rod of the first steering hydraulic cylinder 5041 can be retracted and the piston rod of the second steering hydraulic cylinder 5042 can be extended to achieve forward rotation of the lower support frame. Specifically, those skilled in the art can make settings according to actual needs, and in this embodiment of the invention, no specific limitation is made.

[0086] In this embodiment of the invention, reference is made to Figures 1-4 As shown, the rear axle steering continuous pipe working roller semi-trailer may also include: a power mechanism 2, which is connected to the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042 to drive the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042 to extend and retract.

[0087] In one specific embodiment, the power mechanism 2 may include a first hydraulic pump; the first hydraulic pump is connected to the hydraulic circuit of the first steering hydraulic cylinder 5041 and the second steering hydraulic cylinder 5042. The power mechanism 2 may also include an electric motor 201, which drives the first hydraulic pump to start working.

[0088] The rear-axle steering continuous pipe working roller semi-trailer provided in this embodiment of the invention achieves rear axle steering function through a rear axle drive mechanism, which can meet the transportation requirements of continuous pipes ranging from 2” to over 6600m. By sequentially connecting the frame 1, upper support seat 501, turntable bearing 502, lower support seat 503, and rear axle assembly 4, the steering mechanism drives the lower support seat 503 to achieve steering of the rear axle assembly 4. During the steering process, there is no interference or restriction from the wheels or suspension. The large relative turning angle between the frame 1 and the wheels reduces the turning radius of the semi-trailer, saves steering space, and thus reduces the overall width and size of the vehicle, thereby reducing production and manufacturing costs. Furthermore, the rear axle drive mechanism has a simple structure. Compared with the prior art, it does not require a complex transmission mechanism, which improves the reliability of steering drive, enhances the overall vehicle safety, and reduces the driving intensity of the vehicle.

[0089] The rear-axle steering continuous pipe operation roller semi-trailer provided in this embodiment of the invention uses a rear axle drive mechanism to achieve rear axle steering. Compared with vehicles that use steering linkage mechanisms in the prior art, the frame 1 does not need to use a load-bearing steering axle frame 1. The frame 1 only needs to meet the load-bearing requirements of the rear axle drive mechanism, which reduces the manufacturing difficulty of the frame 1 and further reduces the manufacturing cost.

[0090] As a specific implementation of an embodiment of the present invention, refer to Figure 7 As shown, a roller support seat 101 is provided on the frame 1, and the roller 3 is hinged to the roller support seat 101. In this embodiment of the invention, the roller 3 is fixed to the frame 1 by the roller support seat 101. The front frame 109 of the frame 1 has a receiving cavity for accommodating the roller 3, and the roller 3 is installed in the receiving cavity of the frame 1 by a recessed installation method.

[0091] In one specific embodiment, it can be referred to Figure 2 , Figure 9A and Figure 9B As shown, the roller 3 includes a base 305, the base 305 is provided with a rotating shaft 3051, and the roller support 101 includes an upper mounting base 1011 and a lower mounting base 1012.

[0092] The lower mounting base 1012 is fixed to the vehicle frame 1, the upper mounting base 1011 is detachably connected to the lower mounting base 1012, and the rotating shaft 3051 is rotatably disposed in the receiving cavity of the upper mounting base 1011 and the lower mounting base 1012.

[0093] In one embodiment, refer to Figure 1 and Figure 9B As shown, the rear axle steering continuous pipe working roller semi-trailer also includes a roller lifting mechanism 7;

[0094] The roller lifting mechanism 7 is located at one end of the frame 1 away from the roller support 101 to drive the roller to move up and down along the roller support 101.

[0095] The rear-axle steering continuous pipe operation roller semi-trailer provided in this embodiment of the invention achieves the hinge connection between the roller and the frame 1 through the roller support seat 101. The roller lifting mechanism 7 drives the roller to lift and lower with the roller support seat 101 as the fulcrum. Lifting the roller by the roller lifting mechanism 7 can increase the gap between the roller and the ground, enhance the semi-trailer's ability to pass through obstacle roads. Furthermore, after the roller is lifted, the center of gravity of the roller moves forward, increasing the adhesion of the tractor's drive axle, improving the climbing ability, reducing transportation costs, and achieving a balance between roller transportation and on-site operation needs. It can meet the transportation needs of continuous pipes of 2”-6600m and above in shale gas areas with complex terrain.

[0096] In one embodiment, refer to Figure 9A , Figure 9B and Figure 10 As shown, the above-mentioned roller lifting mechanism 7 includes a first lifting hydraulic cylinder 701 and a second lifting hydraulic cylinder 702;

[0097] Two first lifting hydraulic cylinder fixing parts 103 are symmetrically arranged on both sides of the frame 1, and the cylinder bodies of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 are respectively connected to the first lifting hydraulic cylinder fixing parts 103.

[0098] Two second lifting hydraulic cylinder fixing parts (not shown in the figure) are symmetrically arranged on the base 305. The piston rods of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 are respectively connected to the second lifting hydraulic cylinder fixing parts.

[0099] The aforementioned first lifting hydraulic cylinder fixing part 103 can be a first lifting hydraulic cylinder lug provided on the frame 1. Correspondingly, the cylinder body of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 is provided with a lifting hydraulic cylinder body lug (not shown in the figure), and the lifting hydraulic cylinder body lug is connected to the first lifting hydraulic cylinder lug by a pin.

[0100] Accordingly, the aforementioned second lifting hydraulic cylinder fixing part can be a second lifting hydraulic cylinder 702 ear seat provided on the base 305. Correspondingly, the piston rod ends of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 are provided with lifting hydraulic cylinder piston rod ear seats, and the lifting hydraulic cylinder piston rod ear seats and the second lifting hydraulic cylinder 702 ear seats are connected by a pin.

[0101] In this embodiment of the invention, the extension and retraction of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 drive the roller 3 to rotate around the roller support seat 101 as a fulcrum, thereby achieving the lifting and lowering of the roller 3. When the piston rods of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 extend, the roller 3 rises, which can increase the ground clearance of the entire vehicle. When the roller 3 rises, the center of gravity will shift forward, and the tractor drive axle will obtain greater traction, which helps to improve the climbing ability of the entire vehicle.

[0102] In one specific embodiment, the extension and retraction of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 are controlled by a drive mechanism, wherein, referring to Figure 10 As shown, the power mechanism 2 may include a second hydraulic pump, a four-way directional valve 205 and four one-way throttle valves 206;

[0103] The second hydraulic pump is connected to the hydraulic circuit of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 through the four-way reversing valve 205.

[0104] The outlet end of the four-way reversing valve 205 is connected to the inlet end of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702, and the inlet end of the four-way reversing valve 205 is connected to the outlet end of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702.

[0105] The four one-way throttle valves 206 are respectively connected to the inlet and outlet of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702.

[0106] In this embodiment of the invention, a one-way throttle valve 206 is installed between the second hydraulic pump and the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 to achieve pressure balance between the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702, ensuring the consistency of the actions of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702, and realizing smooth lifting of the roller. When the power mechanism 2 outputs hydraulic force to the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702, the piston rods of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 will move upward synchronously, causing the roller 3 to rotate along the hinge point. The roller 3 tilts forward and its center of gravity is raised, increasing the ground clearance of the roller 3. Due to the forward tilt of the roller 3, the center of gravity of the roller 3 will move forward, and the rear axle of the tractor vehicle will obtain greater traction, which helps to improve the climbing ability of the whole vehicle. In this embodiment of the invention, the specific structure of the four-way reversing valve and the one-way throttle valve can be referred to the detailed description in the prior art. Those skilled in the art can select according to actual needs. In this embodiment of the invention, no specific limitation is made.

[0107] In one specific embodiment, refer to Figure 10 As shown, the power mechanism 2 also includes a pressure regulating valve 207 connected between the second hydraulic pump and the four-way reversing valve to detect the pump fluid pressure of the hydraulic pump.

[0108] In one specific embodiment, the second hydraulic pump can also be driven by the electric motor 201 to start the second hydraulic pump.

[0109] In one specific embodiment, refer to Figure 9A and Figure 9B As shown, the roller 3 also includes a roller body 303 and an oil collection tray 306. The roller body 303 is fixed to the base 305, and the oil collection tray 306 is disposed below the base 305.

[0110] In this embodiment of the invention, by connecting the oil collection tray 306 and the base 305 of the roller 3 into one unit, the oil collection tray 306 can rise and fall synchronously with the base 305. When encountering road sections with high ground clearance for the entire vehicle, such as road sections in shale gas areas with complex terrain, the height of the roller 3 and the oil collection tray 306 is increased by the roller lifting mechanism 7 to ensure the safe passage of the vehicle on road sections with complex terrain and to improve the adaptability of the rear axle steering continuous pipe operation roller semi-trailer to different road environments.

[0111] In one specific embodiment, refer to Figure 9A and Figure 9BAs shown, the roller 3 also includes a pipe manifold 302, a power transmission system 301, and a manifold 304; the pipe manifold 302 and the manifold 304 are respectively disposed on both sides of the roller body 303, and the power transmission system 301 is connected to the pipe manifold 302.

[0112] In this embodiment of the invention, by integrating the pipe manifold 302, the power transmission system 301, and the manifold 304 with the base 305 of the roller 3, the pipe manifold 302, the power transmission system 301, and the manifold 304 can rise and fall synchronously with the base 305, and the overall volume of the roller 3 is reduced, solving the space problem of the frame 1. This is conducive to further realizing the miniaturization design of the rear axle steering continuous pipe operation roller semi-trailer and improving the applicability of the vehicle on different terrains.

[0113] In one embodiment, refer to Figure 1 and Figure 6 As shown, the rear axle steering continuous pipe working roller semi-trailer also includes: a roller rotation support mechanism 6;

[0114] The roller rotation support mechanism 6 includes a rotation support frame 601 and a rotation support frame drive mechanism 602;

[0115] The rotating support frame drive mechanism 602 is configured to drive the rotating support frame 601 to be positioned below the base 305 to support the base 305.

[0116] In this embodiment of the invention, the roller 3 is supported by the roller rotation support mechanism 6. When the roller 3 needs to be in a lifted state for a long time, the rotating support frame 601 is driven to move by the rotating support frame drive mechanism 602, so that the rotating support frame 601 is placed below the base 305 of the roller 3, thereby supporting the roller 3, ensuring the stability of the roller 3 in the lifted state, and improving the reliability of the roller 3.

[0117] In one specific embodiment, refer to Figure 1 , Figure 6 , Figure 9A and Figure 9B As shown, the above-mentioned rotary support drive mechanism includes a rotary support hydraulic cylinder 6021;

[0118] The frame 1 is provided with a first rotary support hydraulic cylinder fixing part 105, and the cylinder body of the rotary support hydraulic cylinder 6021 is connected to the first rotary support hydraulic cylinder fixing part 105.

[0119] The rotating support frame 601 is provided with a second rotating support hydraulic cylinder fixing part 6014, and the piston rod of the rotating support hydraulic cylinder 6021 is connected to the second rotating support hydraulic cylinder fixing part 6014.

[0120] In one specific embodiment, the power mechanism 2 further includes a third hydraulic pump; the third hydraulic pump is connected to the hydraulic circuit of the rotary support hydraulic cylinder 6021.

[0121] In one specific embodiment, refer to Figure 1 and Figure 6 As shown, the rotating support frame 601 includes a rotating support base 6011, a support plate 6012, and a support beam 6013. The rotating support base 6011 is hinged to the vehicle frame 1, and the support beam 6013 connects the rotating support base 6011 and the support plate 6012 respectively. The second rotating support hydraulic cylinder fixing part 6014 is disposed on the support beam 6013.

[0122] The support plate 6012 is configured to abut against the base 305 when the rotating support frame 601 supports the base 305.

[0123] Reference Figure 7 As shown, the first rotary support hydraulic cylinder fixing part 105 can be a first rotary support hydraulic cylinder lug provided on the frame 1. Correspondingly, the cylinder body of the rotary support hydraulic cylinder 6021 is provided with a rotary support hydraulic cylinder body lug (not shown in the figure), and the rotary support hydraulic cylinder body lug is connected to the first rotary support hydraulic cylinder lug by a pin.

[0124] Accordingly, the second rotary support hydraulic cylinder fixing part 6014 mentioned above can be a second rotary support hydraulic cylinder lug provided on the support beam 6013. Correspondingly, the piston rod end of the rotary support hydraulic cylinder 6021 is provided with a rotary support hydraulic cylinder piston rod lug (not shown in the figure), and the rotary support hydraulic cylinder piston rod lug and the second rotary support hydraulic cylinder lug are connected by a pin.

[0125] In this embodiment of the invention, reference is made to Figure 7 As shown, the frame 1 is also provided with a rotating support frame fixing part 104. Specifically, the rotating support frame fixing part 104 can be a rotating support seat ear seat. The rotating support seat 6011 and the rotating support seat ear seat are respectively provided with pin holes. The rotating support seat 6011 and the rotating support seat ear seat are connected by pins.

[0126] In this embodiment of the invention, when the roller 3 is in the lifted state, the extension of the rotary support hydraulic cylinder 6021 pushes the rotary support frame 601 to rotate around the rotary support seat lug as the fulcrum, thereby placing the support plate 6012 below the base 305 of the roller. When the support plate 6012 on the support beam 6013 is located at a preset position below the base 305 of the roller 3, the extension of the piston rods of the first lifting hydraulic cylinder 701 and the second lifting hydraulic cylinder 702 can be appropriately reduced, so that the base 305 of the roller 3 presses the support plate 6012, thereby transmitting the supporting force of the roller 3 from the support beam 6013 and the rotary support seat 6011 to the frame 1, ensuring the stable support of the roller 3 by the rotary support mechanism, and maintaining the roller 3 in the lifted state.

[0127] In one embodiment, refer to Figure 7 As shown, the frame 1 also includes a hydraulic outrigger 108, which is fixed to the front of the frame 1. The power mechanism 2 of the rear axle steering continuous tube roller semi-trailer may also include a fourth hydraulic pump, which is connected to the hydraulic outrigger 108 via a hydraulic circuit to drive the piston rod of the hydraulic outrigger 108 to extend or retract.

[0128] In one specific embodiment, the power mechanism 2 further includes an electric motor 201 to drive the first hydraulic pump, the second hydraulic cylinder, the third hydraulic cylinder, and the fourth hydraulic pump. (Refer to...) Figure 8 As shown, the first hydraulic pump, second hydraulic cylinder, third hydraulic cylinder, and fourth hydraulic pump can be the same hydraulic pump 204. The electric motor 201 of the power mechanism 2 can drive the hydraulic pump to provide power to the first steering hydraulic cylinder 5041, the first lifting hydraulic cylinder 701, the second lifting hydraulic cylinder 702, the rotating support frame hydraulic cylinder, and the hydraulic outrigger 108. In this embodiment of the invention, the electric motor 201 of the power mechanism 2 can be powered by the tractor engine. By configuring the power mechanism 2 on the frame 1, the independence of the entire vehicle of the rear axle steering continuous pipe working roller semi-trailer can be effectively improved, and efficient power control of the entire vehicle can be achieved. (Refer to...) Figure 8 As shown, the power unit 2 may also include a hydraulic oil tank 202 and a filter 203, which work together to provide qualified drive fluid to the aforementioned hydraulic pump. (Refer to...) Figure 1 or Figure 3 As shown, the power mechanism 2 can be located at the front end of the frame 1 near the tractor engine, and a guardrail 8 can also be installed at the end of the frame 1 to protect the power mechanism 2.

[0129] In this embodiment of the invention, in order to clearly demonstrate the specific implementation of the rear axle steering continuous pipe operation roller semi-trailer, the frame 1 may also be equipped with a fire extinguisher box 9, a loading ladder 10, a spare tire 11, a toolbox 12, and a spare tire crane 13. The specific implementation of the fire extinguisher box 9, the loading ladder 10, the spare tire 11, the toolbox 12, and the spare tire crane 13 can be described in detail in the prior art by those skilled in the art. Therefore, in this embodiment of the invention, no specific limitation is required.

[0130] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. The terms "upper," "lower," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for simplifying 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 therefore should not be construed as limiting the invention.

[0131] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. This invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and / or substitution of these aspects and / or embodiments. Each aspect and / or embodiment of this invention can be used alone, or in combination with one or more other aspects and / or other embodiments.

[0132] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rear-axle steering continuous tube working roller semi-trailer, characterized in that, include: The vehicle frame, and the rollers, roller lifting mechanism, roller rotation support mechanism, rear axle assembly and rear axle steering mechanism disposed on the vehicle frame; The rear axle steering mechanism includes an upper support seat, a turntable bearing, a lower support seat, and a steering drive assembly; The steering drive assembly and the upper support seat are mounted on the vehicle frame, the turntable bearing is connected to the upper support seat and the lower support seat respectively, and the lower support seat is fixedly connected to the rear axle assembly; The steering drive assembly is connected to the lower support seat to drive the lower support seat to rotate relative to the upper support seat, thereby causing the rear axle assembly to rotate. The frame is provided with a roller support seat, and the roller is hinged to the roller support seat; the roller lifting mechanism is provided at the end of the frame away from the roller support seat, so as to drive the roller to move up and down along the roller support seat; The drum rotation support mechanism includes a rotation support frame and a rotation support frame drive mechanism; The roller includes a base, and the rotating support frame drive mechanism is configured such that when the roller lifting mechanism drives the roller to rise along the roller support seat and the roller is in a lifted state, the rotating support frame is driven to be placed below the base to support the base. The rotary support drive mechanism includes a rotary support hydraulic cylinder; The frame is provided with a first rotary support hydraulic cylinder fixing part, and the cylinder body of the rotary support hydraulic cylinder is connected to the first rotary support hydraulic cylinder fixing part; The rotating support frame is provided with a second rotating support hydraulic cylinder fixing part, and the piston rod of the rotating support hydraulic cylinder is connected to the second rotating support hydraulic cylinder fixing part; The rotating support frame includes a rotating support base, a support plate, and a support beam. The rotating support base is hinged to the vehicle frame, and the support beam connects the rotating support base and the support plate respectively. The fixing part of the second rotating support hydraulic cylinder is disposed on the support beam. The support plate is configured such that when the rotating support frame supports the base, after the support plate is located at a preset position below the base of the roller, the extension of the roller lifting mechanism is appropriately reduced, so that the base of the roller presses against the support plate and abuts against the base, so as to transfer the supporting force of the roller from the support beam and the rotating support seat to the frame.

2. The rear-axle steering continuous tube working roller semi-trailer as described in claim 1, characterized in that, The turntable bearing includes an outer ring and an inner ring. The inner ring of the bearing is fixedly connected to the upper support seat, and the outer ring of the bearing is fixedly connected to the lower support seat.

3. The rear-axle steering continuous tube working roller semi-trailer as described in claim 2, characterized in that, The steering drive assembly includes a first steering hydraulic cylinder and a second steering hydraulic cylinder; Two first steering hydraulic cylinder fixing parts are symmetrically arranged on both sides of the vehicle frame, and the cylinder bodies of the first steering hydraulic cylinder and the second steering hydraulic cylinder are respectively connected to the first steering hydraulic cylinder fixing parts. Two second steering hydraulic cylinder fixing parts are symmetrically arranged on the lower support base, and the piston rods of the first steering hydraulic cylinder and the second steering hydraulic cylinder are respectively connected to the second steering hydraulic cylinder fixing parts.

4. The rear-axle steering continuous pipe working roller semi-trailer as described in claim 3, characterized in that, Also includes: A power mechanism is connected to the first steering hydraulic cylinder and the second steering hydraulic cylinder to drive the first steering hydraulic cylinder and the second steering hydraulic cylinder to extend and retract.

5. The rear-axle steering continuous pipe working roller semi-trailer as described in claim 4, characterized in that, The power mechanism includes a first hydraulic pump; The first hydraulic pump is connected to the hydraulic circuits of the first steering hydraulic cylinder and the second steering hydraulic cylinder.

6. The rear-axle steering continuous pipe working roller semi-trailer as described in claim 1, characterized in that, The base is provided with a rotating shaft, and the roller support includes an upper mounting base and a lower mounting base; The lower mounting base is fixed to the vehicle frame, the upper mounting base is detachably connected to the lower mounting base, and the rotating shaft is rotatably disposed within the receiving cavity of the upper mounting base and the lower mounting base.

7. The rear-axle steering continuous pipe working roller semi-trailer as described in claim 4, characterized in that, The roller lifting mechanism includes a first lifting hydraulic cylinder and a second lifting hydraulic cylinder; Two first lifting hydraulic cylinder fixing parts are symmetrically arranged on both sides of the frame, and the cylinder bodies of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder are respectively connected to the first lifting hydraulic cylinder fixing parts. Two second lifting hydraulic cylinder fixing parts are symmetrically arranged on the base, and the piston rods of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder are respectively connected to the second lifting hydraulic cylinder fixing parts.

8. The rear-axle steering continuous tube working roller semi-trailer as described in claim 7, characterized in that, The power mechanism includes a second hydraulic pump, a four-way reversing valve, and four one-way throttle valves; The second hydraulic pump is connected to the hydraulic circuits of the first and second lifting hydraulic cylinders via the four-way directional valve. The outlet of the four-way reversing valve is connected to the inlet of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder, and the inlet of the four-way reversing valve is connected to the outlet of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder. The four one-way throttle valves are respectively connected to the inlet and outlet ends of the first and second lifting hydraulic cylinders.

9. The rear-axle steering continuous tube working roller semi-trailer as described in claim 8, characterized in that, The power mechanism also includes a pressure regulating valve connected between the second hydraulic pump and the four-way directional valve to detect the pump fluid pressure of the hydraulic pump.

10. The rear-axle steering continuous tube working roller semi-trailer as described in claim 4, characterized in that, The power mechanism includes a third hydraulic pump; The third hydraulic pump is connected to the hydraulic circuit of the rotary support hydraulic cylinder.

11. The rear-axle steering continuous tube working roller semi-trailer as described in claim 1, characterized in that, The roller also includes a roller body and an oil collection tray. The roller body is fixed to the base, and the oil collection tray is disposed below the base.

12. The rear-axle steering continuous tube working roller semi-trailer as described in claim 11, characterized in that, The roller also includes a pipe manifold, a power transmission system, and a manifold; the pipe manifold and the manifold are respectively disposed on both sides of the roller body, and the power transmission system is connected to the pipe manifold.

13. The rear-axle steering continuous tube working roller semi-trailer as described in claim 11, characterized in that, The frame is a load-bearing frame; the frame also includes hydraulic outriggers, which are fixed to the front of the frame.

14. The rear-axle steering continuous tube working roller semi-trailer as described in claim 13, characterized in that, The vehicle frame includes a front frame, a rear frame, and frame connecting beams; The front frame and the rear frame are fixedly connected by the frame connecting beam; The upper support seat is fixed to the bottom of the rear frame; The roller is fixed to the front frame.

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