Centering tube clamp and clamping method

Abstract

The present application relates to the technical field of petroleum pipe equipment, and particularly relates to a centering pipe clamp and a clamping method. The centering pipe clamp adopts multiple groups of clamping claws which are staggered in vertical height, so that the opening and closing surfaces are staggered, and interference is fundamentally avoided, and therefore the pipe clamp with a large range of pipe diameters can be stably clamped. Each group of clamping claws comprises two clamping arms which are centered on a vertical surface in a middle position, and the motion trajectories of the two clamping arms are symmetrical about the vertical surface, and this feature ensures that the two clamping points of the two clamping arms in each group of clamping claws are symmetrical. Since the vertical surfaces of the multiple groups of clamping claws are distributed on at least two different vertical planes and intersect at the same intersection line, the multiple groups of clamping claws can form at least four clamping points which are symmetrically distributed on the circumference of the pipe clamp and opposite to each other. The centering pipe clamp of the present application can realize high-precision and stable clamping of the pipe clamp with a large range of pipe diameters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petroleum tubing equipment, and particularly relates to a centering tubing clamp and a clamping method. BACKGROUND

[0002] In the operation process of petroleum tubing, clamping of the tubing is a crucial link. However, the existing tubing clamping tools have significant limitations and cannot adapt to the clamping of tubing with a wide range of diameters in the petroleum industry.

[0003] Traditional clamp tools are often only suitable for tubing with a specific diameter range. When facing tubing of different sizes, it is often difficult to achieve precise clamping while ensuring stability. In addition, traditional clamps also have difficulty in ensuring the stability and centering accuracy of the tubing during clamping. Insufficient centering accuracy may cause deviations in the installation process of the tubing, thereby affecting the efficiency and quality of the entire operation process, and even causing safety accidents. At the same time, the existing clamping methods cannot achieve all-around stable clamping, and many clamps can only apply force from partial positions during clamping, which may cause uneven stress on the tubing, potentially leading to damage or clamping failure of the tubing.

[0004] Therefore, there is an urgent need for an efficient clamp tool that can adapt to a wide range of tubing diameters and achieve stable and centered clamping to meet the growing needs of industrial production. SUMMARY

[0005] (I) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a centering tubing clamp, which solves the technical problem that the existing tubing clamps cannot stably clamp tubing with a wide range of diameters.

[0007] (II) Technical solutions

[0008] In order to achieve the above-mentioned purposes, the main technical solutions adopted by the present application include:

[0009] The present application provides a centering tubing clamp, which includes a mounting seat, a driving mechanism and a plurality of sets of clamping jaws arranged in the mounting seat; the plurality of sets of clamping jaws are arranged in vertical height staggered; each set of clamping jaws includes two clamping arms, the two clamping arms in each set of clamping jaws are centered on a vertical plane at the middle position, and the motion trajectories of the two clamping arms are symmetrical about the vertical plane; the vertical planes of the plurality of sets of clamping jaws are distributed on at least two different vertical planes, and the vertical planes of the plurality of sets of clamping jaws intersect at the same intersection line; the driving mechanism simultaneously drives the plurality of sets of clamping jaws to close, and the plurality of sets of clamping jaws form at least four-point contact on the projection plane perpendicular to the axis of the tubing to make the axis of the tubing coincide with the intersection line to form a centered clamping.

[0010] Preferably, the two sets of clamping jaw groups are a first clamping jaw group and a second clamping jaw group, the first clamping jaw group and the second clamping jaw group are staggered in vertical height; the first clamping jaw group comprises a first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are centered on a first vertical plane, and the movement trajectories of the two are symmetrical about the first vertical plane; the second clamping jaw group comprises a third clamping arm and a fourth clamping arm, the third clamping arm and the fourth clamping arm are centered on a second vertical plane, and the movement trajectories of the two are symmetrical about the second vertical plane, the first vertical plane and the second vertical plane intersect; the driving mechanism simultaneously drives the first clamping jaw group and the second clamping jaw group to close, and the first clamping jaw group and the second clamping jaw group form four-point contact with the pipe tool to center and clamp the pipe tool.

[0011] Preferably, the first clamping arm, the second clamping arm, the third clamping arm and the fourth clamping arm are staggered in vertical height.

[0012] Preferably, the first vertical plane and the second vertical plane are symmetrically arranged about a third vertical plane; the first clamping arm and the third clamping arm are centered on the third vertical plane, and the movement trajectories of the two are symmetrical about the third vertical plane; the second clamping arm and the fourth clamping arm are centered on the third vertical plane, and the movement trajectories of the two are symmetrical about the third vertical plane.

[0013] Preferably, the driving mechanism comprises a driving member and two sets of link assemblies; the driving member is connected to the first clamping jaw group and the second clamping jaw group through the two sets of link assemblies; the driving member simultaneously drives the two sets of link assemblies to move, so as to drive the first clamping jaw group and the second clamping jaw group to open and close respectively.

[0014] Preferably, the link assembly comprises a first rod, a second rod, a third rod and a fourth rod; the first end of the first rod is rotationally connected to the output end of the driving member, the second end of the first rod is rotationally connected to the first end of the second rod, the second end of the second rod is rotationally connected to the first end of the third rod and the first end of the fourth rod respectively; the second end of the third rod and the second end of the fourth rod in one link assembly are rotationally connected to the driving end of the first clamping arm and the driving end of the second clamping arm respectively; the second end of the third rod and the second end of the fourth rod in the other link assembly are rotationally connected to the driving end of the third clamping arm and the driving end of the fourth clamping arm respectively; the hinged ends of the first clamping arm, the second clamping arm, the third clamping arm and the fourth clamping arm are all hinged to the mounting seat; when the driving member drives the second rod to be located at a first position through the first rod, the third rod and the fourth rod drive the driving ends of the first clamping arm, the second clamping arm, the third clamping arm and the fourth clamping arm to rotate around the hinged ends to open; when the driving member drives the second rod to be located at a second position through the first rod, the third rod and the fourth rod drive the driving ends of the first clamping arm, the second clamping arm, the third clamping arm and the fourth clamping arm to rotate around the hinged ends to clamp.

[0015] Preferably, the connecting rod assembly further comprises a first limiting piece; the second rod piece moves linearly between the first position and the second position through the first limiting piece.

[0016] Preferably, the first limiting piece comprises a first sliding block and a first fixed block matched with each other, the first fixed block is provided with a first sliding groove, and the first sliding block is in sliding connection with the first sliding groove; the first sliding block is arranged on the second rod piece, and the first fixed block is arranged on the mounting base; or the first sliding block is arranged on the mounting base, and the first fixed block is arranged on the second rod piece.

[0017] Preferably, the clamping surfaces of the first clamping arm, the second clamping arm, the third clamping arm and the fourth clamping arm are arc surfaces; the clamping surfaces of the first clamping arm and the second clamping arm are oppositely arranged; the clamping surfaces of the third clamping arm and the fourth clamping arm are oppositely arranged; the clamping surfaces of the first clamping arm and the third clamping arm are oppositely arranged; and the clamping surfaces of the second clamping arm and the fourth clamping arm are oppositely arranged.

[0018] The application further provides a clamping method of the centering pipe clamp, which adopts the centering pipe clamp and clamps the pipe by the following steps.

[0019] S1, the driving mechanism drives the clamping arms in the plurality of groups of clamping jaws to be opened at the same time;

[0020] S2, the centering pipe clamp and the pipe are moved towards each other;

[0021] S3, the driving mechanism drives the clamping arms in the group of clamping jaws to be closed at the same time, and the plurality of groups of clamping jaws and the pipe form at least four-point contact in the projection plane perpendicular to the axis, so that the axis of the pipe and the intersection line are coincident to form the centering clamping.

[0022] (Three) beneficial effects

[0023] The beneficial effects of the application are as follows:

[0024] The centering pipe clamp of the present application adopts multiple sets of clamping jaw groups staggered in vertical height, so that the opening and closing surfaces are staggered with each other, fundamentally avoiding the interference problem, and thus being able to stably clamp pipe tools with a large range of pipe diameters. Each set of clamping jaw groups comprises two clamping arms, which are centered on a vertical plane in the middle position, and the movement trajectories of the two clamping arms are symmetrical about the vertical plane, which ensures the symmetry of the two clamping points of the two clamping arms in each set of clamping jaw groups. Since the vertical planes of the multiple sets of clamping jaw groups are distributed on at least two different vertical planes and intersect at the same intersection line, the multiple sets of clamping jaw groups can form at least four clamping points that are symmetrically distributed on the circumference of the pipe tool and opposite to each other. Each clamping point can limit the translational freedom of the pipe tool in a specific direction, and the four clamping points can collectively limit four translational freedoms. At the same time, based on the symmetry of the four-point distribution, the rotational freedom of the pipe tool around the axis is also effectively constrained. Through the above structural design, the centering pipe clamp of the present application realizes high-precision stable clamping of pipe tools with a large range of pipe diameters.

[0025] The present application provides a clamping method for a centering pipe clamp, which can clamp pipe tools with a large range of pipe diameters and form at least four-point contact to make the axis of the pipe tool coincide with the intersection line to form centering clamping, ensuring that the pipe tool maintains an accurate position. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure diagram of the centering pipe clamp of the present application is shown in the figure;

[0027] Figure 2 The structure diagram of the top end of the mounting seat not shown in Figure 1

[0028] Figure 3 The structure diagram of the linkage assembly and the first clamping jaw group is shown in the figure;

[0029] Figure 4 The front view of the centering pipe clamp is shown in the figure;

[0030] Figure 5 The diagram of the centering principle is shown in the figure;

[0031] Figure 6 The structure diagram of the centering pipe clamp clamping a large-diameter pipe tool is shown in the figure;

[0032] Figure 7 The structure diagram of the centering pipe clamp clamping a small-diameter pipe tool is shown in the figure.

[0033]

Explanation of reference numerals

[0034] ​1: driving mechanism; 11: driving member; 111: driving body; 112: connecting block; 12: connecting rod assembly; 121: first rod member; 122: second rod member; 123: third rod member; 124: fourth rod member; 125: first limiting member; 1251: first sliding block; 1252: first fixed block; 126: second limiting member; 1261: second sliding block; 1262: second fixed block;

[0035] 2: first jaw set; 21: first clamping arm; 22: second clamping arm;

[0036] 3: second jaw set; 31: third clamping arm; 32: fourth clamping arm;

[0037] 4: mounting seat;

[0038] 5: pipe;

[0039] A: first vertical plane; B: second vertical plane; C: third vertical plane. DETAILED DESCRIPTION

[0040] In order to better explain the present application, so as to be understood, the present application is described in detail below by specific embodiments in combination with the drawings.

[0041] Embodiment one

[0042] The embodiment provides a centering pipe clamp, which comprises a mounting seat 4, a driving mechanism 1 and a plurality of jaw sets, the driving mechanism 1 and the plurality of jaw sets are arranged in the mounting seat 4, and the driving mechanism 1 is used for driving the plurality of jaw sets to open and close.

[0043] The plurality of jaw sets are arranged in vertical height staggeredly, the plurality of jaw sets are arranged in vertical height staggeredly, so that the opening and closing surfaces are staggered, and the interference problem is fundamentally avoided, so that the pipe 5 with a large range of pipe diameters can be clamped stably.

[0044] Each jaw set comprises two clamping arms, the two clamping arms in each jaw set are centered on the vertical plane of the middle position of each clamping arm, and the movement tracks of the two clamping arms in each jaw set are symmetrical about the vertical plane of each clamping arm, so that the two clamping points of the two clamping arms in each jaw set have symmetry.

[0045] The vertical planes in the plurality of jaw sets are distributed on at least two different vertical planes, and the vertical planes of the plurality of jaw sets intersect at the same intersection line, so that the plurality of jaw sets can at least form four clamping points which are symmetrically distributed on the circumference of the pipe 5 and opposite to each other. Each clamping point can limit the translational freedom degree of the pipe 5 in a specific direction, and the four clamping points can limit four translational freedom degrees in total. Based on the symmetry of the four-point distribution, the rotational freedom degree of the pipe 5 around the shaft is also effectively constrained.

[0046] The driving mechanism 1 simultaneously drives multiple sets of clamping jaw groups to form at least four points of contact on the projection plane perpendicular to the axis of the pipe 5 to make the axis of the pipe 5 coincide with the intersection line to form a centering clamping.

[0047] The design of the multiple sets of clamping jaw groups has a unique geometric layout, as shown in Figure 5 Each set of clamping jaw groups corresponds to a vertical plane, and the vertical planes of all the clamping jaw groups intersect at the same intersection line, for example, the first vertical plane A intersects with the second vertical plane B at the intersection line. At the same time, the two clamping arms in each set of clamping jaw groups are symmetrically distributed about the center plane of the clamping jaw group when working. This symmetry makes the axis of the pipe 5 fall exactly on the vertical plane corresponding to each clamping jaw group when clamped. Because all the vertical planes intersect at the same intersection line, when multiple sets of clamping jaw groups jointly implement clamping action on the pipe 5, the axis of the pipe 5 must completely coincide with the intersection line. This ingenious design ensures the accurate positioning and stable clamping of the pipe during clamping from the geometric principle.

[0048] Through the above structural design, the centering pipe clamp of the present application realizes high-precision stable clamping of pipes 5 with a wide range of pipe diameters. As shown in Figure 6 is a structural diagram for clamping a large-diameter pipe 5, and as shown in Figure 7 is a structural diagram for clamping a small-diameter pipe 5. It should be noted that the centering pipe clamp can achieve clamping of pipes 5 with a diameter size ranging from 70mm to 600mm.

[0049] In actual application, the multiple sets of clamping jaw groups can include two, three or four sets, etc. When three sets of clamping jaw groups are provided, the first, second and third clamping jaw groups are arranged staggered in vertical height, wherein the vertical planes of the first and second clamping jaw groups intersect at the intersection line, and the vertical plane of the third clamping jaw group can coincide with one of the vertical planes of the first and second clamping jaw groups or intersect with it, as long as the vertical planes of the three sets of clamping jaw groups can intersect at the same intersection line. Of course, to ensure that the driving mechanism 1 simultaneously drives the three sets of clamping jaw groups, 3 sets of driving members 11 can be provided, each set of driving member 11 driving a set of clamping jaw groups.

[0050] As shown in Figure 1As shown, in order to make the structure simpler and occupy less space, the embodiment includes two sets of clamping jaw groups, the first clamping jaw group 2 and the second clamping jaw group 3, which are staggered in vertical height. In order to achieve stable clamping from the sidewall of the pipe 5 and maximize the opening angle of the clamping jaw group, the vertical angle between the two sets of clamping jaw groups is less than or equal to 90 degrees. In this way, when viewed from the top, the opening angle of the two outermost clamping arms can reach the maximum, thereby greatly enhancing the adaptability of the clamping jaw group to different pipe diameters of the pipe 5, whether the pipe 5 is small in diameter or the pipe 5 has a large range of pipe diameters, stable clamping can be achieved.

[0051] As shown in Figure 2 , the first clamping jaw group 2 includes a first clamping arm 21 and a second clamping arm 22, which are centered on a first vertical plane A and their movement trajectories are symmetrical about the first vertical plane A. The second clamping jaw group 3 includes a third clamping arm 31 and a fourth clamping arm 32, which are centered on a second vertical plane B and their movement trajectories are symmetrical about the second vertical plane B, and the first vertical plane A and the second vertical plane B intersect. The driving mechanism 1 simultaneously drives the first clamping jaw group 2 and the second clamping jaw group 3 to close, and the first clamping jaw group 2 and the second clamping jaw group 3 form four-point contact with the pipe 5 to center and clamp the pipe 5.

[0052] As shown in Figure 2 and 4 , in order to ensure the stability of the clamping arms clamping the pipe 5, the first clamping arm 21, the second clamping arm 22, the third clamping arm 31 and the fourth clamping arm 32 are staggered in vertical height to avoid the problem of the pipe 5 toppling due to the pipe 5 being too long. In this embodiment, in order to minimize the vertical height spacing of the clamping arms in the same clamping jaw group and thereby minimize the size of the driving mechanism 1, while ensuring the stability of the driving mechanism 1 during driving, the clamping arms in the two sets of clamping jaw groups are arranged alternately.

[0053] As shown in Figure 5 , in order to facilitate the arrangement of the driving mechanism 1 and make the structure of the driving mechanism 1 simple, the first vertical plane A and the second vertical plane B are symmetrically arranged about a third vertical plane C, the first clamping arm 21 and the third clamping arm 31 are centered on the third vertical plane C and their movement trajectories are symmetrical about the third vertical plane, and the second clamping arm 22 and the fourth clamping arm 32 are centered on the third vertical plane and their movement trajectories are symmetrical about the third vertical plane.

[0054] As shown in Figure 2As shown, the driving mechanism 1 comprises a driving member 11 and two sets of link assemblies 12, the driving member 11 is connected with the first jaw set 2 and the second jaw set 3 through the two sets of link assemblies 12 respectively, and the driving member 11 drives the two sets of link assemblies 12 to move simultaneously to drive the first jaw set 2 and the second jaw set 3 to open and close respectively. Wherein, the first jaw set 2 and the second jaw set 3 are symmetrically arranged along the third vertical plane.

[0055] As shown in Figure 3 , Figure 6 and Figure 7 , the link assembly 12 comprises a first link 121, a second link 122, a third link 123 and a fourth link 124, the first end of the first link 121 is rotatably connected with the output end of the driving member 11, the second end of the first link 121 is rotatably connected with the first end of the second link 122, and the second end of the second link 122 is rotatably connected with the first end of the third link 123 and the first end of the fourth link 124 respectively. Wherein, the second end of the third link 123 and the second end of the fourth link 124 in one link assembly 12 are rotatably connected with the driving end of the first clamping arm 21 and the driving end of the second clamping arm 22 respectively, and the second end of the third link 123 and the second end of the fourth link 124 in the other link assembly 12 are rotatably connected with the driving end of the third clamping arm 31 and the driving end of the fourth clamping arm 32 respectively.

[0056] In actual application, the hinge ends of the first clamping arm 21, the second clamping arm 22, the third clamping arm 31 and the fourth clamping arm 32 are directly hinged with the mounting seat 4 through a pin shaft or hinged with a hinge seat arranged on the mounting seat 4 through a pin shaft. In this embodiment, the first clamping arm 21 and the third clamping arm 31 are hinged with the mounting seat 4 through a pin shaft, in order to avoid interference between multiple vertically arranged pin shafts and other components, the second clamping arm 22 and the third clamping arm 31 are hinged with the hinge seat arranged on the mounting seat 4.

[0057] When the driving member 11 drives the second rod member 122 to the first position through the first rod member 121, the third rod member 123 and the fourth rod member 124 in one linkage assembly 12 drive the driving ends of the first clamping arm 21 and the second clamping arm 22 to rotate in opposite directions around the respective hinged ends to be opened, while the third rod member 123 and the fourth rod member 124 in the other linkage assembly 12 drive the driving ends of the third clamping arm 31 and the fourth clamping arm 32 to rotate in opposite directions around the respective hinged ends to be opened. When the driving member 11 drives the second rod member 122 to the second position through the first rod member 121, the third rod member 123 and the fourth rod member 124 in one linkage assembly 12 drive the driving ends of the first clamping arm 21 and the second clamping arm 22 to rotate in the same direction around the respective hinged ends to be clamped, while the third rod member 123 and the fourth rod member 124 in the other linkage assembly 12 drive the driving ends of the third clamping arm 31 and the fourth clamping arm 32 to rotate in the same direction around the respective hinged ends to be clamped.

[0058] As shown in Figure 3 and Figure 7 To ensure the directional movement of the second rod member 122 in the first position and the second position, the linkage assembly 12 further comprises a first limiting member 125, which comprises a matched first sliding block 1251 and a first fixed block 1252, and the first fixed block 1252 is provided with a first sliding groove, and the first sliding block 1251 is in sliding connection with the first sliding groove. In this embodiment, the first sliding block 1251 is arranged on the second rod member 122, and the first fixed block 1252 is arranged on the mounting seat 4; or the first sliding block 1251 is arranged on the mounting seat 4, and the first fixed block 1252 is arranged on the second rod member 122. In this embodiment, each set of linkage assembly 12 comprises two first limiting members 125, and the two first limiting members 125 are respectively located on the upper and lower sides of the second rod member 122, wherein the first sliding block 1251 is located on the second rod member 122, and the first fixed block 1252 is located on the inner side of the mounting seat 4.

[0059] As shown in Figure 2 and Figure 7As shown, the driving member 11 comprises a driving body 111 and a connecting block 112, the fixed end of the driving body 111 is arranged on the mounting seat 4, the connecting block 112 is connected with the driving end of the driving body 111, and the connecting block 112 is connected with the first end of the first connecting rod in the two groups of connecting rod assemblies 12 respectively. Wherein, the driving body 111 drives the connecting block 112 to move linearly along the third vertical plane, in order to ensure the stability of the movement of the connecting block 112, the connecting rod assembly 12 further comprises a second limiting member 126, the second limiting member 126 comprises a matched second sliding block 1261 and a second fixed block 1262, and the second fixed block 1262 is provided with a second sliding groove, and the second sliding block 1261 is in sliding connection with the second sliding groove. Wherein, the second sliding block 1261 is arranged on the connecting block 112, and the second fixed block 1262 is arranged on the mounting seat 4, or the second sliding block 1261 is arranged on the mounting seat 4, and the second fixed block 1262 is arranged on the connecting block 112. In this embodiment, each group of connecting rod assemblies 12 comprises two second limiting members 126, and the two second limiting members 126 are located on the upper and lower sides of the connecting block 112 respectively, wherein the second sliding block 1261 is located on the connecting block 112, and the second fixed block 1262 is located on the inner side of the mounting seat 4.

[0060] In order to ensure the stability of the clamping of the clamping arms, the clamping surfaces of the first clamping arm 21, the second clamping arm 22, the third clamping arm 31 and the fourth clamping arm 32 are arc surfaces, the clamping surfaces of the first clamping arm 21 and the second clamping arm 22 are arranged opposite to each other, the clamping surfaces of the third clamping arm 31 and the fourth clamping arm 32 are arranged opposite to each other, the clamping surfaces of the first clamping arm 21 and the third clamping arm 31 are arranged opposite to each other, and the clamping surfaces of the second clamping arm 22 and the fourth clamping arm 32 are arranged opposite to each other.

[0061] Embodiment two

[0062] The embodiment provides a clamping method of the centering pipe clamp, adopts the centering pipe clamp in the embodiment one, and clamps the pipe 5 through the following steps:

[0063] S1, the driving mechanism 1 drives the clamping arms in the plurality of groups of clamping jaw assemblies to be opened at the same time;

[0064] S2, the centering pipe clamp and the pipe 5 move towards each other;

[0065] S3, the driving mechanism 1 drives the clamping arms in the plurality of groups of clamping jaw assemblies to be closed at the same time, and the plurality of groups of clamping jaw assemblies and the pipe 5 form at least four point contacts in the projection plane perpendicular to the axis line, so that the axis line of the pipe 5 coincides with the intersection line to form the centering clamping.

[0066] The centering pipe clamp holding method provided by the embodiment can realize holding of a pipe 5 with a large range of pipe diameter changes and can form at least four points of contact to make the axis of the pipe 5 coincide with the intersection line to form centering holding, thereby ensuring that the pipe 5 is kept in an accurate position. In the description of the present application, it needs to be understood that the terms "first", "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0067] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be directly above or obliquely above the first feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "under" and "under" the second feature, which can be directly below or obliquely below the first feature, or only means that the horizontal height of the first feature is lower than that of the second feature.

[0069] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that modifications, substitutions, replacements and variations of the above-described embodiments can be made by those skilled in the art within the scope of the present application.

Claims

1. A centering tube clamp, characterized in that, Includes a mounting base (4) and two sets of gripper assemblies disposed within the mounting base (4); The two sets of gripper groups are a first gripper group (2) and a second gripper group (3), and the first gripper group (2) and the second gripper group (3) are staggered in vertical height; The first gripper assembly (2) includes a first gripping arm (21) and a second gripping arm (22). The first gripping arm (21) and the second gripping arm (22) are centered on the first vertical plane (A), and their movement trajectories are symmetrical about the first vertical plane (A). The second gripper assembly (3) includes a third gripping arm (31) and a fourth gripping arm (32). The third gripping arm (31) and the fourth gripping arm (32) are centered on the second vertical plane (B), and their movement trajectories are symmetrical about the second vertical plane (B). The first vertical plane (A) and the second vertical plane (B) intersect. The first vertical plane (A) and the second vertical plane (B) are symmetrically arranged about the third vertical plane (C); The first clamping arm (21) and the third clamping arm (31) are centered on the third vertical plane (C), and their movement trajectories are symmetrical about the third vertical plane (C); The second clamping arm (22) and the fourth clamping arm (32) are centered on the third vertical plane (C), and their movement trajectories are symmetrical about the third vertical plane (C).

2. The centering tube clamp as described in claim 1, characterized in that: It also includes a drive mechanism (1) disposed within the mounting base (4); The driving mechanism (1) simultaneously drives the first gripper group (2) and the second gripper group (3) to close, and the first gripper group (2) and the second gripper group (3) form a four-point contact with the tube (5) to center and clamp the tube (5).

3. The centering tube clamp as described in claim 1, characterized in that: The first clamping arm (21), the second clamping arm (22), the third clamping arm (31) and the fourth clamping arm (32) are arranged alternately in the vertical height.

4. The centering tube clamp as described in claim 2, characterized in that: The drive mechanism (1) includes a drive component (11) and two sets of linkage assemblies (12). The drive unit (11) is connected to the first gripper group (2) and the second gripper group (3) respectively through two sets of the link assemblies (12); The drive unit (11) simultaneously drives the two sets of the linkage assemblies (12) to move, so as to drive the first gripper group (2) and the second gripper group (3) to open and close respectively.

5. The centering tube clamp as described in claim 4, characterized in that: The linkage assembly (12) includes a first link (121), a second link (122), a third link (123) and a fourth link (124). The first end of the first rod (121) is rotatably connected to the output end of the drive member (11), the second end of the first rod (121) is rotatably connected to the first end of the second rod (122), and the second end of the second rod (122) is rotatably connected to the first end of the third rod (123) and the first end of the fourth rod (124), respectively. The second end of the third rod (123) and the second end of the fourth rod (124) in the linkage assembly (12) are respectively rotatably connected to the driving end of the first clamping arm (21) and the driving end of the second clamping arm (22); In another linkage assembly (12), the second end of the third rod (123) and the second end of the fourth rod (124) are respectively rotatably connected to the driving end of the third clamping arm (31) and the driving end of the fourth clamping arm (32); The hinge ends of the first clamping arm (21), the second clamping arm (22), the third clamping arm (31), and the fourth clamping arm (32) are all hinged to the mounting base (4); When the driving member (11) drives the second rod (122) to the first position via the first rod (121), the third rod (123) and the fourth rod (124) drive the driving ends of the first clamping arm (21), the second clamping arm (22), the third clamping arm (31) and the fourth clamping arm (32) to rotate around the hinge end to open; When the driving member (11) drives the second member (122) to the second position via the first member (121), the third member (123) and the fourth member (124) drive the driving ends of the first clamping arm (21), the second clamping arm (22), the third clamping arm (31) and the fourth clamping arm (32) to rotate around the hinge end for clamping.

6. The centering pipe clamp as described in claim 5, characterized in that: The linkage assembly (12) also includes a first limiting member (125); The second rod (122) moves linearly between the first position and the second position via the first limiting member (125).

7. The centering tube clamp as described in claim 6, characterized in that: The first limiting member (125) includes a first sliding block (1251) and a first fixing block (1252) that cooperate with each other. The first fixing block (1252) has a first sliding groove, and the first sliding block (1251) is slidably connected to the first sliding groove. The first sliding block (1251) is disposed on the second rod (122), and the first fixing block (1252) is disposed on the mounting base (4); Alternatively, the first sliding block (1251) may be disposed on the mounting base (4), and the first fixing block (1252) may be disposed on the second rod (122).

8. The centering tube clamp as described in claim 2, characterized in that: The clamping surfaces of the first clamping arm (21), the second clamping arm (22), the third clamping arm (31), and the fourth clamping arm (32) are arc-shaped surfaces; The clamping surfaces of the first clamping arm (21) and the second clamping arm (22) are arranged facing each other; The clamping surfaces of the third clamping arm (31) and the fourth clamping arm (32) are arranged facing each other; The clamping surfaces of the first clamping arm (21) and the third clamping arm (31) are arranged facing each other; The clamping surfaces of the second clamping arm (22) and the fourth clamping arm (32) are arranged facing each other.

9. A clamping method for a centering tube clamp, characterized in that: Using the centering pipe clamp as described in any one of claims 1-8, the pipe (5) is clamped through the following steps: S1. Drive the clamping arms in the two sets of gripper groups to open simultaneously through the drive mechanism (1); S2, the centering pipe clamp and the pipe (5) move toward each other; S3. The driving mechanism (1) drives the clamping arms in the gripper group to close simultaneously. The vertical surfaces of the two gripper groups intersect at the same intersection line. The two gripper groups and the tube (5) form four-point contact on the projection plane perpendicular to the axis so that the axis of the tube (5) coincides with the intersection line to form a centering clamp.

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