Mouth aligning device

Abstract

The utility model provides an aligning device, and relates to the field of pipeline construction equipment. The aligning device comprises an aligning mechanism, a driving mechanism and a power mechanism, and the aligning mechanism and the driving mechanism are connected through a tensioning cylinder with the two ends hinged to each other. The aligning mechanism comprises a front rack, a middle rack, a tensioning structure, at least two front walking wheel assemblies and a positioning arm assembly. The tensioning structure comprises a first tensioning device and a second tensioning device; the at least two front walking wheel assemblies are symmetrically arranged at the lower part of the aligning mechanism; the positioning arm assembly is arranged on the front rack; when the positioning arm assembly is supported, the plane where the end face of the fixing block of the positioning arm assembly is located is parallel to the plane where the first tensioning device is located and the plane where the second tensioning device is located.

Description

Technical Field

[0001] The utility model relates to the field of pipeline construction equipment, in particular to a coupling device. Background Art

[0002] At present, in pipeline construction, ordinary internal joints can only solve the joint construction needs of straight pipe sections in plain areas. Due to the characteristics of more curved pipes in mountain pipeline construction, the existing internal joints are rigid structures as a whole and are too long to pass through curved pipes with larger curvatures (for example, curved pipes with a minimum bending radius of 6D). On the other hand, in order to ensure the quality of the joint, it is necessary to repeat the joint and adjust the equipment many times, and the joint time is too long.

[0003] CN113020761A provides a jointer with a positioning arm. After the positioning arm is propped up, the positioning arm is reversed into the pipe so that the positioning arm is against the end face of the pipe to achieve joint positioning. However, since the jointer is an integral structure and a certain straight pipe section is required as the reverse distance during positioning and reverse, the jointer provided in this solution cannot be used in the jointing of curved pipes with large curvatures.

[0004] In order to meet the climbing requirements of mountain construction, the existing internal alignment device simply changes the left and right sets of driving wheels of the ordinary pneumatic internal alignment device from being driven by two pneumatic motors to being driven by hydraulic motors. This can improve the power to a certain extent, but the effect is not obvious when the slope is large, the equipment is insufficiently powered, and cannot meet the climbing requirements.

[0005] When the docking device is moving in the pipeline, due to improper adjustment of the equipment's travel wheels or equipment manufacturing errors, the equipment will slowly deflect along the axis while moving forward when passing through some curved pipes. It is necessary to correct the equipment's deflection in real time before the equipment reaches the pipe mouth to avoid affecting the efficiency of the docking construction.

[0006] CN205074720U provides an automatic deviation correction mechanism, which hinges one end of the running wheel with the alignment device, and drives the running wheel to deflect by pushing and pulling the other end of the running wheel through the driving element to achieve deviation correction. Since one end of the running wheel is fixed in this scheme, the deflection angle of the running wheel is limited, and when turning, the running wheel on one side is pushed out and the running wheel on the other side is pulled back, resulting in inconsistent deflection angles of the running wheels on both sides, which affects the steering deviation correction effect.

[0007] The existing equipment uses a split structure of a distribution plate and a double-row expansion claw. Since the split distribution plate with double-row expansion claws has insufficient rigidity when working together, cracks and deformations are likely to occur during the docking process, which seriously reduces the work efficiency of pipeline construction. Utility Model Content

[0008] According to the first aspect of the present invention, a mouthpiece is provided to solve at least one of the above technical problems. The technical solution of the mouthpiece provided by the present invention is as follows:

[0009] (1) A docking device, comprising a docking mechanism, a driving mechanism and a power mechanism, wherein the docking mechanism is connected to the driving mechanism via a tensioning cylinder hinged at both ends; the docking mechanism comprises a front frame, a middle frame, a tensioning structure, at least two front running wheel assemblies and a positioning arm assembly; the tensioning structure comprises a first tensioning device and a second tensioning device; the at least two front running wheel assemblies are symmetrically arranged at the lower part of the docking mechanism; the positioning arm assembly is arranged on the front frame; when the positioning arm assembly is propped up, the plane where the end face of the fixed block of the positioning arm assembly is located is parallel to the plane where the first tensioning device is located and the plane where the second tensioning device is located.

[0010] (2) According to the docking device described in (1), the hinged connections at both ends of the tensioning cylinder include ball joint connections, and the docking mechanism and the driving mechanism are connected through three tensioning cylinders with ball joint connections at both ends, wherein two of the tensioning cylinders are symmetrically arranged at the upper part of the connection section, and one of the tensioning cylinders is arranged at the bottom of the connection section.

[0011] (3) According to the coupling device described in (1) or (2), the tensioning cylinder includes a tensioning oil cylinder and a tensioning air cylinder; and the driving mechanism and the power mechanism are connected via a universal coupling.

[0012] (4) According to the alignment device described in any one of items (1) to (3), the driving mechanism includes a first rear frame, a top wheel driving assembly and at least two driving wheel assemblies, and the top wheel driving assembly includes a top driving wheel, a top wheel driving frame, a driving support cylinder and a slide rail; the top wheel driving assembly is connected to the first rear frame through the slide rail, and is radially extended or retracted from the top of the driving mechanism as the driving support cylinder is supported and retracted; the at least two driving wheel assemblies are symmetrically arranged at the lower part of the driving mechanism.

[0013] (5) According to the docking device described in any one of items (1) to (4), the hinged connection at both ends of the tensioning cylinder includes a ball joint connection, and the tensioning cylinder connection between the docking mechanism and the driving mechanism via the ball joint connection at both ends includes: the ball joints at both ends of the tensioning cylinder are fixedly connected to the middle frame and the first rear frame respectively, wherein the method of fixing the ball joint to the middle frame and the first rear frame includes at least one of the following: bolt connection, welding and riveting.

[0014] (6) According to any one of items (1) to (5), the docking device comprises two front walking wheel assemblies and four positioning arm assemblies, and the four positioning arm assemblies are evenly distributed on the front frame; the driving mechanism comprises two top wheel driving assemblies and four driving wheel assemblies, and the top wheel driving assemblies and the driving wheel assemblies are divided into two groups and arranged at the front and rear ends of the driving mechanism, and each group comprises one top wheel driving assembly and two driving wheel assemblies.

[0015] (7) According to any one of (1) to (6), the top wheel drive assembly and the drive wheels of the at least two drive wheel assemblies are driven by a hydraulic motor.

[0016] (8) According to any one of items (1) to (7), the top wheel drive assembly is connected to the first rear frame via a slide rail, including: the guide rail of the slide rail is connected to the first rear frame, and the slider of the slide rail is connected to the top wheel drive frame; or the slider of the slide rail is connected to the first rear frame, and the guide rail of the slide rail is connected to the top wheel drive frame, wherein the guide rail of the slide rail is connected to the first rear frame or the top wheel drive frame by bolt connection, riveting, welding, gluing or integral casting; the slider of the slide rail is connected to the first rear frame or the top wheel drive frame by bolt connection, riveting, welding, gluing or integral casting.

[0017] (9) According to any one of items (1) to (8), the alignment device further comprises an angle sensor, which is configured to measure the deflection angle of the alignment device in real time; the front running wheel assembly and / or the driving wheel assembly is also provided with a steering cylinder assembly, the steering cylinder assembly comprises a steering cylinder and a steering cylinder rocker arm, the steering cylinder rocker arm is connected to the rotating shaft of the front running wheel assembly and / or the driving wheel assembly, so that the front running wheel and / or the driving wheel are steered with the swing of the steering cylinder rocker arm.

[0018] (10) According to the coupling device described in any one of (1) to (9), the first tensioning device includes a first row of expansion claws, the second tensioning device includes a second row of expansion claws, and the tensioning structure also includes a distribution plate, the first row of expansion claws and the second row of expansion claws are extended and retracted by the distribution plate, and the distribution plate of the first row of expansion claws and the distribution plate of the second row of expansion claws are cast as one piece.

[0019] (11) According to any one of (1) to (10), the mouthpiece further includes an internal welding structure.

[0020] The mouthpiece provided by the utility model has the following beneficial technical effects:

[0021] (1) The equipment is divided into three sections, and the length of each section is designed according to the minimum bending radius (for example, 6D). It is connected by high-degree-of-freedom components such as ball joints and universal couplings, and can pass through curved pipes with larger curvatures;

[0022] (2) Through the coordination of the tensioning cylinder and the positioning arm, the equipment can be used for better and faster positioning and concentricity of the bent pipe, reducing the equipment adjustment time and improving efficiency;

[0023] (3) The whole machine adopts a hydraulic system to control multiple groups of top wheel drive assemblies and driving wheel assemblies. After each top wheel drive assembly arranged on the first rear frame is pressed against the inner wall of the pipeline by a hydraulic cylinder, the driving wheel assembly is fully in contact with the inner wall of the pipeline under the pressure of the top wheel drive assembly. When the pressure perpendicular to the contact surface increases, the friction force and driving force of each driving wheel are increased compared with the existing alignment device, and the climbing ability of the alignment device is significantly improved;

[0024] (4) Steering cylinders are added to the travel wheels and drive wheels on the first two sections of the mouthpiece. The angle sensor on the equipment measures the deflection angle of the equipment in real time, and the rotation axis of the travel wheels and drive wheels is controlled to steer based on the deflection angle of the equipment, thereby improving the real-time correction effect of the equipment when it is moving in the pipe;

[0025] (5) The two distribution plates are designed as an integrated distribution plate, which improves the rigidity of the equipment and makes the connection more reliable.

[0026] Explanation of relevant terms involved in this utility model:

[0027] (1) Internal alignment device: The name of the equipment. During pipeline construction, two rows of expansion claws are used to fix two pipes so that the two pipes are coaxial. At the same time, it has a certain rounding function for some pipes with deformed pipe ends.

[0028] (2) Minimum bending radius: refers to the centerline bending radius of the pipe (for example, 6D means 6 times the outer diameter D of the pipe).

[0029] (3) Tension cylinder: A hydraulic cylinder or pneumatic cylinder that connects the front two sections of the equipment through a ball joint.

[0030] (4) Positioning arm: Position the device at the pipe mouth, ensuring that the pipe mouth is located between the two tensioning devices.

[0031] (5) Distribution plate: A key component of the equipment, providing support and guidance for the claws. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Figure 1 It is a schematic diagram of the overall structure of the mouthpiece according to some embodiments of the utility model;

[0034] Figure 2 for Figure 1 The overall structure of the middle mouthpiece is shown in cross-section along line AA;

[0035] Figure 3 It is a schematic diagram of the cooperation between the positioning arm assembly of the alignment device and the tensioning cylinder according to some embodiments of the utility model;

[0036] Figure 4 It is a structural schematic diagram of a tensioning cylinder with ball joints at both ends according to some embodiments of the utility model;

[0037] Figure 5 for Figure 1 The overall structure of the middle mouthpiece is shown in cross-section along line BB;

[0038] Figure 6 It is a cross-sectional view of the top wheel drive assembly in working state according to some embodiments of the utility model;

[0039] Figure 7 It is a structural schematic diagram of a top wheel drive assembly according to some embodiments of the utility model;

[0040] Figure 8 It is a schematic diagram of the structure of a steering cylinder assembly according to some embodiments of the utility model;

[0041] Fig. 9 It is a schematic diagram of assembling the front running wheel assembly and the steering cylinder assembly according to some embodiments of the utility model;

[0042] Fig.10 It is a schematic diagram of an integrated distribution tray according to some embodiments of the present invention.

[0043] In the figure, 107 is a universal coupling, 110 is a matching mechanism, 111 is a front frame, 112 is a middle frame, 113 is a tensioning structure, 1131 is a first tensioning device, 1132 is a second tensioning device, 115 is a front walking wheel assembly, 117 is a positioning arm assembly, 1171 is a fixing block, 130 is a driving mechanism, 131 is a first rear frame, 133 is a top wheel driving assembly, 1331 is a top driving wheel, 1332 is a top wheel driving frame, 1333 is a supporting seat, 1334 is a slide rail, 1335 is a driving support cylinder, 135 is a driving wheel assembly, 150 is a plurality of driving wheels, 131 ... is the power mechanism, 151 is the second rear frame, 155 is the rear walking wheel assembly, 201 is the ball joint, 203 is the tensioning cylinder, 301 is the first pipeline, 302 is the head of the docking device, 801 is the steering cylinder cover, 802 is the steering cylinder barrel, 803 is the steering cylinder piston rod, 804 is the pin, 805 is the steering cylinder bottom, 806 is the steering cylinder limit block, 807 is the key, 808 is the steering cylinder rocker arm, 901 is the steering cylinder support, 903 is the nut, 905 is the front wheel spacer, 906 is the bearing cover, 907 is the bearing mounting seat, 1159 is the rotating shaft, and 1135 is the distribution plate. DETAILED DESCRIPTION

[0044] Figure 1 Schematic diagram of the overall structure of the mouthpiece according to some embodiments of the present utility model. Figure 1 As shown, the docking device provided by the utility model is a three-section structure, including a docking mechanism 110, a driving mechanism 130 and a power mechanism 150. The docking mechanism 110 and the driving mechanism 130 are connected through a tensioning cylinder 203 connected at both ends by ball joints 201; the driving mechanism 130 and the power mechanism 150 are connected through a universal coupling 107. Among them, the tensioning cylinder 203 connected between the docking mechanism 110 and the driving mechanism 130 includes a hydraulic tensioning cylinder and a pneumatic tensioning cylinder.

[0045] In some embodiments, the number of the tensioning cylinders 203 connected between the docking mechanism 110 and the driving mechanism 130 may be at least one, preferably three.

[0046] The docking mechanism 110 may include a front frame 111 , a middle frame 112 , a tensioning structure 113 , at least two front running wheel assemblies 115 and a positioning arm assembly 117 .

[0047] like Figure 2 As shown, Figure 1 The overall structure of the middle aligner is a cross-sectional view along line AA. At least two front running wheel assemblies are symmetrically arranged at the lower part of the aligning mechanism. Preferably, Figure 2The number of the middle front running wheel assemblies is 2, and the 2 front running wheel assemblies are symmetrically arranged at a position 45 degrees from the vertical normal line at the lower part of the matching mechanism. Optionally, the number of the front running wheel assemblies can also be 4, and each group of two is symmetrically arranged backward along the matching machine head, and the utility model does not limit this.

[0048] The tensioning structure 113 may include a first tensioning device 1131 and a second tensioning device 1132 . The first tensioning device 1131 may include a first row of tensioning claws or a first push rod group, and the second tensioning device 1132 may include a second row of tensioning claws or a second push rod group.

[0049] When there are multiple positioning arm assemblies, multiple positioning arm assemblies 117 are evenly distributed on the front frame 111. Preferably, Figure 2 The number of the middle positioning arm assemblies 117 is 4, and the 4 positioning arm assemblies 117 are evenly distributed and arranged on the front frame 111. Optionally, the number of the positioning arm assemblies 117 can also be 3.

[0050] When the positioning arm assembly 117 is propped up, the plane where the end face of the fixed block of the positioning arm assembly 117 is located is parallel to the plane where the first tensioning device 1131 and the plane where the second tensioning device 1132 are located, and is located in the middle position between the plane where the first tensioning device 1131 and the plane where the second tensioning device 1132 are located. When the fixed block is against the end face of the pipeline, the position of the pipeline connection can be limited to the middle of the two tensioning devices, wherein the connecting pipeline can include a steel pipe, a cast iron pipe, etc.

[0051] Figure 3 This is a schematic diagram of the cooperation between the positioning arm assembly and the tensioning cylinder of the alignment device according to some embodiments of the utility model. In the figure, the first tensioning device 1131 is the first row of expansion claws, the second tensioning device 1132 is the second row of expansion claws; the number of tensioning cylinder assemblies 203 is 3; the number of positioning arm assemblies is 4. For example, 301 is the first pipe that needs to be aligned, and 302 is the head of the alignment device.

[0052] Before the matchmaking device fixes the first pipe 301, the three tensioning cylinders 203 (also called tensioning cylinder assemblies) are propped up, the equipment moves to the position of the first pipe orifice, and the positioning arm assembly 117 is propped up. The plane formed by the fixed blocks 1171 of the four positioning arms after being propped up is parallel to the plane where the first row of expansion claws 1131 and the plane where the second row of expansion claws 1132 are located, and is located in the middle position between the plane where the first row of expansion claws 1131 and the plane where the second row of expansion claws 1132 are located. After the end face of the fixed block 1171 is located in the middle position of the two rows of expansion claws, the three tensioning cylinder assemblies are retracted, so that the matching mechanism moves backward as a whole, and the positioning arm assembly 117 is against the end face of the first pipe 301, so that the axis of the machine head 302 can be parallel to the axis of the first pipe 301, and the end face of the pipe orifice is located in the middle position of the machine head 302, the second row of expansion claws are propped up to fix the first pipe, so that the center line of the machine head coincides with the center line of the first pipe, and the positioning arm assembly 117 is retracted. The second pipe (not shown in the figure) is aligned with the first pipe and fixed with the first row of expansion claws. After the second pipe is fixed by the first row of expansion claws and coincides with the axis of the machine head, the concentricity of the two pipes can be guaranteed, thereby improving the alignment quality and efficiency.

[0053] Figure 4 The diagram is a structural diagram of a tensioning cylinder with ball joints at both ends according to some embodiments of the utility model. In some embodiments, the docking device provided by the utility model can be divided into three sections, and the first section structure (i.e., docking mechanism) and the second section structure (i.e., driving mechanism) are connected by three tensioning cylinder assemblies 203, and the two ends of the tensioning cylinder assembly 203 are respectively connected to the middle frame 112 of the docking mechanism and the first rear frame 131 of the driving mechanism by ball joints 201. A universal coupling can be used to connect the driving mechanism and the power mechanism. Figure 4 The ball joint structures 201 at both ends of the middle tensioning cylinder 203 are fixedly connected to the middle frame 112 and the first rear frame 131 respectively by bolts, and optionally, they can also be fixedly connected by welding or riveting, etc., which is not limited in the present invention.

[0054] Compared with the integral structure and the two-stage structure of the coupling device, the three-stage structure in the embodiment of the utility model greatly shortens the length of each section of the coupling device, and a ball joint connection or a universal coupling is used to connect the three-stage structures. Compared with the situation in which the bending is restricted due to the influence of the spring compression in the connection method using a spring and a universal coupling, the angle formed between each section of the structure in the utility model is larger, so that the device as a whole is a flexible structure, and the device can pass through a curved pipe with a small bending radius (for example, a bending radius of 6D).

[0055] Figure 5 for Figure 1 The cross-section of the overall structure of the middle mouthpiece along line BB, Figure 5The arrangement of the three tensioning cylinders 203 is shown in the figure. As shown in the figure, in order to meet the requirements of freedom, two of the three tensioning cylinders 203 are symmetrically arranged at a position of 45 degrees on the upper part of the cross section, and the remaining tensioning cylinder is arranged at the bottom.

[0056] like Figure 1 As shown, the driving mechanism 130 may include a first rear frame 131, a top wheel drive assembly 133 and at least two drive wheel assemblies 135. Preferably, the driving mechanism includes two top wheel drive assemblies and four drive wheel assemblies. The two top wheel drive assemblies 133 and the four drive wheel assemblies 135 are divided into two groups and arranged at the front and rear ends of the driving mechanism 130, and each group includes one top wheel drive assembly 133 and two drive wheel assemblies 135. The top wheel drive assembly is arranged at the top of the driving mechanism 130 and is connected to the first rear frame 131 through a slide rail; at least two drive wheel assemblies 135 are symmetrically arranged at the bottom of the driving mechanism 130. The driving wheels of the top wheel drive assembly 133 and at least two drive wheel assemblies 135 are driven by a hydraulic motor to drive the mouthpiece to move.

[0057] Taking the case where the driving mechanism 130 includes two top wheel drive assemblies 133 and four drive wheel assemblies 135 as an example, the two top wheel drive assemblies 133 and the four drive wheel assemblies 135 are installed at the front and rear ends of the first rear frame 131 in two groups, and each group includes one top wheel drive assembly and two drive wheel assemblies. Figure 6 The cross-sectional view of the working state of the top wheel drive assembly according to some embodiments of the utility model, when working, the top wheel drive assembly is propped up to support the inner wall of the pipe 301, and at the same time, the driving wheel of the driving wheel assembly 135 located below the first rear frame 131 can press the inner wall of the pipe 301, so that the driving wheel of the driving wheel assembly 135 is in full contact with the inner wall of the pipe, while increasing the pressure between the driving wheel and the inner wall of the pipe 301, which can provide greater friction. The hydraulic system controls and drives 6 hydraulic motors at the same time, so that the driving wheels in the top wheel drive assembly 133 and the driving wheel assembly 135 rotate, driving the equipment to move. Two groups of 6 driving wheels can provide sufficient power and friction, so that the equipment can meet the requirements for climbing ability during mountain construction. For example, it can achieve walking up and down a slope with a maximum angle of 30 degrees.

[0058] Figure 71 is a schematic diagram of the structure of the top wheel drive assembly according to some embodiments of the utility model. The top wheel drive assembly 133 may include: a top drive wheel 1331, a top wheel drive frame 1332, a support seat 1333, a slide rail 1334 and a drive propping cylinder 1335. The drive propping cylinder 1335 is directly fixed to the first rear frame 131 by bolts or welding, the guide rail of the slide rail 1334 is fixed to the first rear frame 131 by bolts or welding, and the slider of the slide rail 1334 is connected to the top wheel drive frame 1332 by welding or integral casting, so that the top wheel drive assembly 133 can extend or retract from the top of the drive mechanism 130 along the slide rail 1334 as the drive propping cylinder 1335 is propped up and retracted, so as to achieve the tightening and release of the inner wall of the pipeline. The propping cylinder 1335 includes a hydraulic propping cylinder, a pneumatic propping cylinder or other mechanically driven propping cylinders. The slide rail 1334 may include a dovetail slide rail, a cylindrical slide rail, a rectangular slide rail, etc. Figure 7 As shown in the top view in the direction of A, the slide rail 1334 is preferably a dovetail groove slide rail.

[0059] In some embodiments, the top wheel drive assembly 133 is connected to the first rear frame 131 via the slide rail 1334 and may also include: the slider of the slide rail 1334 is fixedly connected to the first rear frame 131 by bolts or welding, and the guide rail of the slide rail 1334 is connected to the top wheel drive frame 1332 by welding or integral casting.

[0060] The matchmaker provided by the utility model may also include an angle sensor, and the angle sensor is configured to measure the deflection angle of the matchmaker in real time when the matchmaker is moving. Correspondingly, a steering cylinder assembly may also be provided at the front running wheel assembly 115 of the matching mechanism and / or the driving wheel assembly 135 of the driving mechanism. The steering cylinder assembly is configured to control the steering cylinder to drive the rotating shaft of the front running wheel assembly 115 and / or the driving wheel assembly 135 to steer based on the deflection angle measured by the angle sensor. Among them, the steering cylinder includes a hydraulic cylinder, preferably a steering oil cylinder. The steering cylinder assembly may be provided at all the front running wheel assemblies or all the driving wheel assemblies, or may be provided at part of the front running wheel assemblies or part of the driving wheel assemblies. It can be adjusted according to the actual application situation, and the utility model does not limit this.

[0061] Figure 8 The schematic diagram of the steering cylinder assembly structure according to some embodiments of the utility model. As shown in the figure, the steering cylinder cover 801, the steering cylinder barrel 802 and the steering cylinder bottom 805 are connected by bolts, and the steering cylinder piston rod 803 can slide inside the steering cylinder barrel 802 to form a piston cylinder. The steering cylinder limit block 806 is fixed on the steering cylinder barrel 802 to limit the left and right extreme positions of the steering cylinder piston rod 803.

[0062] The steering cylinder rocker arm 808 is connected to the steering cylinder piston rod 803 through the pin 804, and swings around the pin 804 as the steering cylinder piston rod 803 slides. The key 807 is on the steering cylinder rocker arm 808, and plays a role of fixed connection with the rotating shaft of the front running wheel assembly 115 or the rotating shaft of the driving wheel assembly 135.

[0063] In some embodiments, the steering cylinder cover 801, the steering cylinder barrel 802 and the steering cylinder bottom 805 may also be assembled by riveting or welding.

[0064] Fig. 9 The figure is a schematic diagram of assembling the front travel wheel assembly and the steering cylinder assembly according to some embodiments of the utility model. The steering cylinder support 901 is fixed to the front frame 111 by bolts or rivets, and the steering cylinder assembly is connected to the front frame 111 by the steering cylinder support 901 and the pin. The bearing mounting seat 907 is fixed to the front frame 111 by bolts or rivets.

[0065] The rotating shaft 1159 of the front running wheel assembly 115 passes through the bearing mounting seat 907, the inner hole of the bearing (the bearing located in the bearing mounting seat 907 is not shown in the figure), the bearing cover 906, the front wheel spacer 905 and the steering cylinder rocker arm 808 in sequence, and is connected to the steering cylinder rocker arm 808 of the steering cylinder assembly through the nut 903 and the stop washer. The sliding of the steering cylinder piston rod 803 can drive the steering cylinder rocker arm 808 to swing, and the steering cylinder rocker arm 808 acts on the steering shaft 1159 of the front running wheel assembly 115 to drive the front running wheel assembly to rotate, thereby realizing the steering control of the front running wheel.

[0066] The above is an exemplary description based on the assembly of the front running wheel assembly and the steering cylinder assembly. In the utility model, the steering cylinder assembly can also be assembled at the driving wheel assembly of the driving mechanism to achieve steering control of the driving wheel assembly. The specific assembly method can refer to the above description of assembling the steering cylinder assembly at the front running wheel assembly, which will not be repeated here.

[0067] According to some embodiments of the utility model, when the first tensioning device of the counterpart mechanism is a first row of expansion claws and the second tensioning device is a second row of expansion claws, the tensioning structure may further include a distribution plate, and the first row of expansion claws and the second row of expansion claws are extended and retracted by guiding the distribution plate.

[0068] Fig.10The schematic diagram of the integral distribution plate according to some embodiments of the utility model. During the pipeline construction, two pipes are fixed by two rows of front and rear expansion claws, so that the two pipes are coaxial, and the distribution plate 1135 plays a guiding role, and each expansion claw slides up and down in the evenly distributed holes of the distribution plate 1135. After the two rows of expansion claws fix the two pipes, the weight of the two pipes will act on the distribution plate through the expansion claws, and the distribution plate with a split structure is prone to cracks, resulting in cracks at the joints of the two pipes.

[0069] The distribution plate of the first row of expansion claws 1131 and the distribution plate of the second row of expansion claws 1132 in the docking device provided by the utility model are cast as one piece. Since the distribution plate 1135 is integral, it has greater rigidity, avoids the problem of opening seams in the split distribution plate, and improves the stability and efficiency of the docking operation.

[0070] The power mechanism 150 may include a second rear frame 151 and a rear running wheel assembly 155 . The rear frame 151 may be provided with power-related devices, including but not limited to a hydraulic oil tank, a motor, and the like.

[0071] According to some other embodiments of the utility model, the butt jointer may further include an internal welding structure for internally welding the pipes after the butt joints of the pipes are completed.

[0072] The above embodiments are not exhaustive of specific implementation methods, and there may be other embodiments. The above embodiments are intended to illustrate the utility model rather than to limit the protection scope of the utility model. All applications derived from simple changes of the utility model fall within the protection scope of the utility model.

[0073] This patent specification uses examples to demonstrate the utility model, including the best mode, and enables those skilled in the art to make and use the utility model. The scope of the utility model includes the contents of the claims and the specific implementation methods and other embodiments in the specification. These other examples should also fall within the scope of the patent right of the utility model, as long as they contain the technical features described in the same written language as the claims, or they contain technical features described in similar literal language that are not substantially different from the claims.

[0074] The entire contents of all cited patents, patent applications and other references in this utility model should be incorporated into this application document by reference. However, if a term in this application conflicts with a term in the reference, the term in this application takes precedence.

[0075] It should be noted that the words "first", "second" or similar do not indicate any order, quality or importance, but are used to distinguish different technical features. The modifier "about" used in conjunction with a quantity includes the meaning specified by the stated value and the context of the content. (For example: it includes the error in measuring a specific quantity).

Claims

1. A mouthpiece, It is characterized in that It comprises a matching mechanism (110), a driving mechanism (130) and a power mechanism (150), wherein the matching mechanism (110) and the driving mechanism (130) are connected via a tensioning cylinder (203) with hinged ends; The matching mechanism (110) comprises a front frame (111), a middle frame (112), a tensioning structure (113), at least two front running wheel assemblies (115) and a positioning arm assembly (117); The tensioning structure (113) comprises a first tensioning device (1131) and a second tensioning device (1132); The at least two front running wheel assemblies (115) are symmetrically arranged at the lower part of the matching mechanism (110); The positioning arm assembly (117) is arranged on the front frame (111); when the positioning arm assembly (117) is propped up, the plane where the end surface of the fixing block (1171) of the positioning arm assembly (117) is located is parallel to the plane where the first tensioning device (1131) is located and the plane where the second tensioning device (1132) is located.

2. The mouthpiece according to claim 1, It is characterized in that The hinged connection at both ends of the tensioning cylinder (203) includes a ball joint (201) connection, and the counterpart mechanism (110) and the driving mechanism (130) are connected through three tensioning cylinders (203) connected at both ends by ball joints (201), wherein two of the tensioning cylinders (203) are symmetrically arranged at the upper part of the connection section, and one of the tensioning cylinders (203) is arranged at the bottom of the connection section.

3. The mouthpiece according to claim 1, It is characterized in that The tensioning cylinder (203) comprises a tensioning oil cylinder and a tensioning air cylinder; the driving mechanism (130) and the power mechanism (150) are connected via a universal coupling (107).

4. The mouthpiece according to claim 1, It is characterized in that The driving mechanism (130) comprises a first rear frame (131), a top wheel driving assembly (133) and at least two driving wheel assemblies (135); the top wheel driving assembly (133) comprises a top driving wheel (1331), a top wheel driving frame (1332), a driving propping cylinder (1335) and a slide rail (1334); The top wheel driving assembly (133) is connected to the first rear frame (131) via the slide rail (1334), and is extended or retracted radially from the top of the driving mechanism (130) as the driving supporting cylinder (1335) is raised or retracted; The at least two driving wheel assemblies (135) are symmetrically arranged at the lower part of the driving mechanism (130).

5. The mouthpiece according to claim 4, It is characterized in that The hinged connection at both ends of the tensioning cylinder (203) includes a ball joint (201) connection, and the connection between the counterpart mechanism (110) and the driving mechanism (130) through the tensioning cylinder (203) connected at both ends by ball joints (201) includes: The ball joints (201) at both ends of the tensioning cylinder (203) are fixedly connected to the middle frame (112) and the first rear frame (131) respectively, wherein the manner in which the ball joint (201) is fixedly connected to the middle frame (112) and the first rear frame (131) includes at least one of the following: bolt connection, welding and riveting.

6. The mouthpiece according to claim 4, It is characterized in that The matching mechanism (110) comprises two front walking wheel assemblies (115) and four positioning arm assemblies (117), and the four positioning arm assemblies (117) are evenly distributed on the front frame (111); the driving mechanism (130) comprises two top wheel driving assemblies (133) and four driving wheel assemblies (135), and the top wheel driving assemblies (133) and the driving wheel assemblies (135) are divided into two groups and arranged at the front and rear ends of the driving mechanism (130), and each group comprises one top wheel driving assembly (133) and two driving wheel assemblies (135).

7. The mouthpiece according to claim 4, It is characterized in that The top wheel drive assembly (133) and the drive wheels of at least two drive wheel assemblies (135) are driven by a hydraulic motor.

8. The mouthpiece according to claim 4, It is characterized in that The top wheel drive assembly (133) is connected to the first rear frame (131) via a slide rail (1334) and includes: The guide rail of the slide rail (1334) is connected to the first rear frame (131), and the slider of the slide rail (1334) is connected to the top wheel driving frame (1332); or The slider of the slide rail (1334) is connected to the first rear frame (131), and the guide rail of the slide rail (1334) is connected to the top wheel driving frame (1332). Wherein, the connection method between the guide rail of the slide rail (1334) and the first rear frame (131) or the top wheel driving frame (1332) includes bolt connection, riveting, welding, gluing or integral casting; the connection method between the slider of the slide rail (1334) and the first rear frame (131) or the top wheel driving frame (1332) includes bolt connection, riveting, welding, gluing or integral casting.

9. The mouthpiece according to claim 4, It is characterized in that The mouthpiece further comprises an angle sensor, and the angle sensor is configured to measure the deflection angle of the mouthpiece in real time; The front running wheel assembly (115) and / or the driving wheel assembly (135) is also provided with a steering cylinder assembly, the steering cylinder assembly comprising a steering cylinder and a steering cylinder rocker arm (808), the steering cylinder rocker arm (808) being connected to a rotating shaft (1159) of the front running wheel assembly (115) and / or the driving wheel assembly (135), so that the front running wheel and / or the driving wheel are steered as the steering cylinder rocker arm (808) swings.

10. The mouthpiece according to claim 1, It is characterized in that The first tensioning device (1131) includes a first row of expansion claws, the second tensioning device (1132) includes a second row of expansion claws, and the tensioning structure (113) also includes a distribution plate (1135). The first row of expansion claws and the second row of expansion claws are guided to extend and retract using the distribution plate (1135). The distribution plate (1135) of the first row of expansion claws and the distribution plate (1135) of the second row of expansion claws are cast as one piece.

11. The mouthpiece according to any one of claims 1 to 10, It is characterized in that The coupling device also includes an inner welding structure.

Images