Low-abrasion guide and guard device for conveying and feeding metal pipes

Abstract

According to the low-abrasion guide and guard device for conveying and feeding of the metal pipe, abrasion can be effectively relieved for relative movement generated in all directions of the contact face between the pipe and the supporting and abutting device, surface loss and damage of the pipe are reduced, and meanwhile the continuous feeding and positioning accuracy of the pipe is improved. The device comprises a supporting base and positioning guide plates, a pair of movable clamping plates are arranged between the positioning guide plates, and a plurality of spherical movable supporting and abutting seats are further arranged on the inner sides of the movable clamping plates. The spherical movable supporting and abutting seat comprises a base part fixed to the movable clamping plate and a rolling ball head movably arranged at the front end of the base part and capable of rotating around the center of the rolling ball head. The spherical movable supporting and abutting seat can move horizontally, open and close along with the movable clamping plate, and the metal pipe is clamped or loosened on a plane in the vertical direction through the rolling ball heads on the two sides of the spherical movable supporting and abutting seat.

Description

Technical Field

[0001] The invention relates to the field of equipment for metal pipe workpiece processing and production, in particular to a low-wear guide device for metal pipe conveying and feeding. Background Art

[0002] Before processing the metal pipe, a guide device for guiding the pipe is required to ensure that the pipe can accurately and stably enter and pass through the roll pass, thereby improving the stability of the rolling process and product quality. The main functions of the guide device include not only guiding the pipe to enter the roll pass in a predetermined direction and state, but also avoiding collision or friction with the roll, reducing irregular deformation and vibration; ensuring that the pipe deforms stably in the pass to obtain the required geometric shape and size; smoothly leading the pipe out of the pass to prevent roll entanglement accidents. In addition, the guide device can effectively reduce rolling accidents, protect equipment and personal safety, and improve the working conditions of the roll, pipe and guide itself. The design and use of the guide device is crucial to the smooth progress of the rolling process, and its performance directly affects the quality and production efficiency of the product. At present, in the actual production and processing of metal pipes, various guide devices are designed accordingly for various working conditions.

[0003] For example, a fully enclosed guide device for a three-roller piercing machine for tube oblique rolling disclosed in the Chinese invention patent document with application number CN201810586850.2 includes a frame, on which a closed guide device is installed, and the closed guide device includes a hollow cylinder, on the side wall of which three grooves are provided to match the side walls of the three rollers of the three-roller oblique rolling piercing machine, and the cylinder is used to place the tube blank. The fully enclosed guide device for a three-roller piercing machine for tube oblique rolling provided in the invention scheme can prevent the formation of a tail triangle during tube blank processing, while ensuring uniform tube wall thickness and simple equipment structure. Another example is a new pipe straightening machine entrance guide device disclosed in the Chinese utility model patent document with application number CN200920095675.3, which includes a bottom plate, a bracket fixedly mounted on the bottom plate, a bracket panel mounted on the upper end of the bracket, two rotating shafts symmetrically arranged on both sides of the bracket panel, a side plate symmetrically arranged on the inner side of the rotating shaft, a fixed block arranged at the lower end of the side plate, a limit block mounted on the bracket panel at the position corresponding to the fixed block, the lower end of the limit block mounted on the horizontally placed adjustment screw, the adjustment screw mounted on the lower end of the bracket panel, a hand wheel mounted on the end of the adjustment screw, a bracket fixedly mounted on the lower end of the middle part of the bracket panel, a hydraulic cylinder mounted on the bracket, connecting rods mounted on both sides of the hydraulic cylinder, and the connecting rods connected to the lower end of the rotating shaft. Therefore, the above structure can simultaneously control the side plates on both sides to open and close at the same time, thereby improving the centering effect of the entrance guide device on the straightened steel pipe, so that the straightened steel pipe can bite into the straightening machine normally. In addition, the utility model also has the advantages of simple structure, convenient installation and use, and improved work efficiency.

[0004] However, the applicant has found that when metal pipes pass through the through-holes of these guide devices, they usually experience a large degree of wear and tear on the supporting component structure in the equipment. On the one hand, this wear acts on the metal pipes and causes uncontrollable scratch damage to the surface of the metal pipes. On the other hand, this situation will also cause the guide sleeve components on the guide equipment to experience greater wear during continuous production and processing, which will lead to the problem of increased positioning error of the pipes, which can only be corrected and repaired by replacing the guide sleeve components. In the above situation, as the size and quality of the pipes increase, the degree of wear will also increase rapidly. In addition, in the actual production and processing process, although the conventional roller-type guide mechanism can reduce the wear caused by the translational motion during the feeding process of the pipes, since the pipes will also undergo spiral rotation or reciprocating twisting within a certain angle range during processing, it is difficult for the roller components to reduce the wear of this part of the movement, resulting in increased wear of the roller components themselves.

[0005] In response to the above problems, the present invention provides a low-wear guide device for conveying and feeding metal pipes, which can effectively reduce the wear of the metal pipes that are subjected to translational conveying and feeding and rotational motion around the axis during the production and processing process. The relative motion generated in all directions on the contact surface between the pipes and the support device can reduce the surface loss and damage of the metal pipes, and can also improve the positioning accuracy of the pipes during the continuous feeding process. Summary of the invention

[0006] The present invention provides a low-wear guide device for conveying and feeding metal pipes. The guide device can effectively reduce wear on the metal pipes that perform translational conveying and feeding and also perform rotational motion around an axial direction during the production and processing process. The guide device can thereby reduce surface loss and damage of the metal pipes and improve the positioning accuracy of the pipes during continuous feeding.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: A low-wear guide device for conveying and feeding metal pipes comprises a supporting base at the bottom and two positioning guide plates extending in the vertical direction respectively arranged at the front and rear ends of the supporting base, a pair of movable clamping plates capable of horizontal translational movement is arranged between the two positioning guide plates, a plurality of spherical movable support seats are also arranged on the inner side of the movable clamping plates, the spherical movable support seats comprise a base portion fixed to the movable clamping plate and a rolling ball head movably arranged at the front end of the base portion and capable of rotating around its own center; the spherical movable support seat can follow the movable clamping plate to perform translational opening and closing movement, and utilize the rolling ball heads on both sides to achieve clamping or loosening of the metal pipe in a vertical plane.

[0008] As a preferred embodiment of the present invention, a translation guide structure is formed between the positioning guide plate and the movable clamping plate, and the translation guide structure includes a guide groove formed on the positioning guide plate, and guide parts formed on both sides of the movable clamping plate, and the guide parts are embedded in the guide groove and can perform translational movement along the guide groove; a through hole for the metal pipe to pass through is also provided on the positioning guide plate.

[0009] As a preferred embodiment of the present invention, a pair of the spherical movable support seats are respectively provided on the movable clamping plates on both sides, the connecting line between the spherical movable support seats on the movable clamping plate on the same side is in a slant line shape, and the connecting lines formed by the spherical movable support seats on different movable clamping plates on both sides are in a cross state.

[0010] As a preferred embodiment of the present invention, three of the spherical movable support seats are respectively arranged on the movable clamping plates on both sides, the spherical movable support seats on the movable clamping plate on one side are arranged in a herringbone shape, and the spherical movable support seats on the movable clamping plate on the other side are arranged in an inverted herringbone shape.

[0011] As a preferred embodiment of the present invention, a threaded screwing structure for adjusting the horizontal position of the rolling ball head is formed between the base portion and the movable clamping plate.

[0012] As a preferred embodiment of the present invention, a synchronous control mechanism for controlling the synchronous opening and closing movement of the movable clamping plates on both sides and a driving device arranged on the supporting base and transmission-connected to the synchronous control mechanism are also provided between the two movable clamping plates and the supporting base.

[0013] As a preferred embodiment of the present invention, the synchronous control mechanism includes a driving connecting rod movably arranged on the supporting base, and the driving connecting rod can rotate around the central axis along the vertical direction under the drive of the driving device. The driving connecting rod is provided with synchronous guide hole grooves on both sides of the central axis. The bottom of the two movable clamping plates are also respectively formed with downwardly protruding synchronous opening and closing guide parts, and the synchronous opening and closing guide parts are embedded in the synchronous guide hole grooves. The synchronous opening and closing guide parts can reciprocate along the extension direction of the synchronous guide hole groove and rotate relative to the synchronous guide hole groove, so that the movable clamping plates on both sides are synchronously retracted or moved outward.

[0014] As a preferred embodiment of the present invention, a through strip guide groove is further provided on the side of the positioning guide plate, the driving device contains a piston rod capable of telescopic and translational movement, and a swing connecting section is provided at the front end of the piston rod; a connecting extension section is formed at one end of the driving connecting rod, and the connecting extension section passes through the strip guide groove outward and is hinged to the swing connecting section.

[0015] In summary, the present invention can achieve the following multiple beneficial effects: The low-wear guide device for conveying and feeding metal pipes provided by the scheme of the present invention can effectively reduce the wear of the metal pipes that are subjected to translational conveying and feeding and also undergo rotational motion around the axis during the production and processing process. The relative motion generated in all directions on the contact surface between the pipes and the supporting device can reduce the surface loss and damage of the metal pipes, and can also improve the positioning accuracy of the pipes during the continuous feeding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structural diagram of the low-wear guide device for conveying and feeding metal pipes; Figure 2 A schematic diagram of the structure of a low-wear guide device for conveying and feeding metal pipes from a side view; Figure 3 It is a partial enlarged schematic diagram of the translation guide structure; Figure 4 It is a partial enlarged schematic diagram of the spherical movable support seat; Figure 5 It is a schematic diagram of the structure of the internal synchronous control mechanism of the guide device.

[0017] In the figure: A——Metal pipe; 1——Supporting base; 2——positioning guide plate, 201——through hole, 202——strip guide groove; 3——Active clamping plate; 4——spherical movable support seat, 401——base part, 402——rolling ball head; 5——translation guide structure, 501——guide slot, 502——guide portion; 6——Threaded engagement structure; 7——synchronous control mechanism, 701——driving connecting rod, 7011——connecting extension section, 702——synchronous guide hole groove, 703——synchronous opening and closing guide part; 8——driving device, 801——piston rod, 802——swinging connecting section. DETAILED DESCRIPTION

[0018] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

[0019] This solution is achieved through the following technical means: Embodiment 1: In this embodiment, a low-wear guide device for conveying and feeding metal pipes is provided. The guide device can effectively reduce the wear on the metal pipe A which is subjected to translational conveying and feeding and rotational motion around the axis during the production and processing process. The relative motion in all directions between the pipe and the support device on the contact surface can thereby reduce the surface loss and damage of the metal pipe A. At the same time, it can also improve the positioning accuracy of the pipe during the continuous feeding process.

[0020] For details, please refer to the attached manual. Figure 1 In the structure shown, the guide device first comprises a support base 1 arranged at the bottom, and two positioning guide plates 2 extending in the vertical direction are respectively fixedly installed at the front and rear ends of the support base 1 by bolt locking, and a pair of movable clamping plates 3 capable of horizontal translational movement are installed in the middle space between the two positioning guide plates 2. A group of through holes 201 are provided on the two positioning guide plates 2 to allow the metal pipe A to be processed to pass through the two positioning guide plates 2 from front to back, and at the same time, a strip guide groove 202 extending in the horizontal direction and penetrating one side of the positioning guide plate 2 is also provided at the lower part of at least one positioning guide plate 2.

[0021] The connection structure between the movable clamping plate 3 and the aforementioned positioning guide plate 2 can be referred to in the attached manual. Figure 3The partial enlarged view shown shows a translation guide structure 5. The translation guide structure 5 here includes a guide slot 501 formed on the positioning guide plate 2, and a guide portion 502 formed on both sides of the movable clamping plate 3, the guide portion 502 is embedded in the guide slot 501 and can perform translational movement along the guide slot 501. It should be noted here that the bottom of the movable clamping plate 3 here is L-shaped, forming a forward extending section, and the bottom of the movable clamping plates 3 on both sides are arranged in a centrally symmetrical state, so that the aforementioned extended sections are in a mutually staggered state. A synchronous control mechanism 7 is provided between the movable clamping plate 3 and the supporting base 1 for controlling the two movable clamping plates 3 to move outward or inward synchronously, so as to realize the use of the spherical movable support seat 4 to complete the conversion between the clamping support limit or the relaxation state of the metal pipe A.

[0022] Before explaining the synchronous control mechanism 7 here, it is necessary to explain that the key technical point of the invention of this application is that a plurality of spherical movable support seats 4 are installed on the inner side surfaces of the two movable clamping plates 3 mentioned above. Specifically, the structure of the single spherical movable support seat 4 here includes a base portion 401 fixed to the movable clamping plate 3 and a rolling ball head 402 movably arranged at the front end of the base portion 401 and capable of rotating around its own center. A cavity portion with two ends extending outward is formed in the base portion 401 here, wherein the radial dimension of the inner end is larger than the diameter of the rolling ball head 402, and the radial dimension of the outer end is smaller than the diameter of the rolling ball head 402, so the rolling ball head 402 can be placed in the cavity portion from the larger end and move to the other end, and because the opening of the other end is smaller, the rolling ball head 402 will not fall out from there. At this time, it is only necessary to install a supporting component inside the cavity, such as a push rod or a supporting spring, so that a portion of the rolling ball head 402 can protrude outward from the base 401 without falling out, and when the contact surface is subjected to external friction force, it can use its own rotation around the center to convert the sliding friction between the components into rolling friction, thereby greatly reducing the wear between the guide device and the metal pipe A that is continuously pushed forward to feed the material.

[0023] It should also be noted that, after passing through the positioning and guiding treatment of the guide device, the metal pipe A will enter the next processing equipment, and the actual processing procedures of the pipe by the latter equipment may actually include rolling, grinding or drilling and other forms. Therefore, during the continuous feeding process, the metal pipe A will actually produce continuous rotation of its own central axis or reciprocating deflection and swing within a certain angle range while moving horizontally. Therefore, compared with other conventional roller-type support structures that may be used, the structure of the spherical movable support seat 4 adopted in this scheme can only rotate around a fixed central axis due to the structural characteristics of the rolling ball head 402 used to contact the metal pipe. Therefore, the rolling ball head 402 can rotate in any direction around its own center point under the force of the contact point, thereby ensuring that the friction effect on the contact surface of the component with the metal pipe in all directions can be mainly rolling friction, thereby further greatly reducing the wear on the surface of the metal pipe and the contact support component in the guide device.

[0024] Of course, on the basis of the above structure, a synchronous control mechanism 7 is also required to ensure that the movable clamping plates 3 on both sides and the spherical movable member installed on the inner side move inward or outward together, and the movement amount relative to the metal pipe A located at the center is uniform and the same, so as to avoid generating unnecessary supporting force on one side of the pipe, thereby causing the metal pipe A to deviate or bend and deform, affecting the feeding of the pipe and subsequent further processing steps.

[0025] Specifically, the synchronous control mechanism 7 here includes a driving connecting rod 701 movably arranged on the supporting base 1. The structure and function of the driving connecting rod 701 here can be referred to in the attached manual. Figure 5 As shown in the figure, it is a long strip in shape and is arranged horizontally between the two movable clamping plates 3 and the supporting base 1, and the driving connecting rod 701 can rotate around a central axis in the vertical direction. Figure 5Taking the given structure as an example, a cylindrical inner concave hole can be opened on the aforementioned support base 1, and at the same time, a downwardly protruding cylindrical portion is formed at the middle position of the driving connecting rod 701, and the cylindrical portion is inserted into the inner concave hole, so as to realize the relative positioning and rotation state between the two parts. In order to use the synchronous control mechanism 7 to realize the control of the aforementioned two-sided active clamping movement, the aforementioned synchronous control mechanism 7 can be further designed to open a synchronous guide hole groove 702 on the driving connecting rod 701, which is arranged on both sides of the aforementioned central axis along the vertical direction, and at the same time, a downwardly protruding synchronous opening and closing guide portion 703 is also provided at the bottom of the two movable clamping plates 3, respectively, and the synchronous opening and closing guide portion 703 is embedded in the synchronous guide hole groove 702, and the synchronous opening and closing guide portion 703 can reciprocate along the extension direction of the synchronous guide hole groove 702 while rotating relative to the synchronous guide hole groove 702.

[0026] Also attached to the instruction manual Figure 5Taking the given structure as an example, the synchronous guide hole groove 702 here is in a long strip state symmetrically arranged on both sides of the driving connecting rod 701, and the hole groove passes through the driving connecting rod 701 in the vertical direction; and the aforementioned synchronous opening and closing guide part 703 is actually also in a cylindrical shape protruding downward, and the synchronous opening and closing guide parts 703 located on two different movable clamping plates 3 are located on the forward extension part of the bottom of the L-shaped plate. At this time, the two synchronous opening and closing guide parts 703 are located above the driving connecting rod 701, so that the synchronous opening and closing guide parts 703 on both sides can face the synchronous guide hole groove 702 below. At the same time, the diameter of the cylindrical part section as the synchronous opening and closing guide part 703 corresponds to the width of the long strip synchronous guide hole groove 702, so that the two parts abut each other after the cylindrical part is inserted into the hole groove, without affecting the rotation and translation of the cylindrical part inside the hole groove. It should be further explained here that the aforementioned synchronous opening and closing guide part 703 cannot be completely fixedly installed at the bottom of the movable clamping plate 3, but is connected by a slidable clamping structure, so that the synchronous opening and closing guide part 703 can reciprocate relative to the movable clamping plate 3 along the axial direction parallel to the feeding direction of the metal pipe A. The design purpose of this structure is that when the aforementioned driving connecting rod 701 rotates around the central axis of the vertical direction, the synchronous opening and closing guide part 702 will move along the synchronous guide hole, that is, the synchronous opening and closing guide part 702 actually moves obliquely relative to the positioning guide plate 2 in space. Since the two sides of the movable clamping plate 3 are restrained by the positioning guide plate 2, the oblique movement is decomposed into two parts: the translation of the movable clamping plate 3 along the strip guide groove 202 and the translation movement of the synchronous opening and closing guide part 703 itself relative to the movable clamping plate 3, thereby realizing the opening and closing translation movement control of each spherical movable support seat 4 on the movable clamping plate 3 on both sides.

[0027] Under this structure, it is only necessary to apply a force in the vertical screen direction to one end of the driving connecting rod 701 to drive it to rotate around the hinge center between the supporting base 1. Then, under the push-pull action of the inner wall of the synchronous guide hole groove 702, the two synchronous opening and closing guide parts 703 will be driven to move closer to or away from each other, and then the movable clamping plates 3 on both sides will be driven to move closer to or away from each other. At this time, the spherical movable support seats 4 located on the interactive clamping plates on both sides can be used to complete the support and positioning of the metal pipe or to relax it.

[0028] In order to realize the above-mentioned driving action, a driving device 8 for controlling and driving the aforementioned driving connecting rod 701 to rotate should also be provided. Specifically, it is necessary to utilize the aforementioned strip guide groove 202 provided on the side of the positioning guide plate 2, and at the same time, one end of the driving connecting rod 701 continues to extend outward to form a connecting extension section 7011. The type of driving device 8 can be selected from a hydraulic cylinder, a starting cylinder or an electric mechanical telescopic arm mechanism, which includes a piston rod 801 capable of performing telescopic translational movement, and at the same time, a swing connecting section 802 is provided at the front end of the piston rod 801, and the two ends of the swing connecting section 802 are respectively hinged with the aforementioned connecting extension section 7011 passing through the strip guide groove 202 and the front end of the piston rod 801. At this time, the telescopic movement of the piston rod 801 can be utilized to complete the control of the rotation of the driving connecting rod 701 and the adjustment of the opening and closing action of the movable clamping plates 3 on both sides.

[0029] In the technical solution provided in this embodiment, a structural state is selected in which two pairs of spherical movable support seats 4 are respectively provided on the movable clamping plates 3 on both sides. Figure 4 The structural schematic diagram from a top view is given, with a total of four support and support seat structures respectively located on the movable clamping plates 3 on both sides as a unit; in this unit, along the front to rear direction, the spherical movable support and support seat 4 on the movable clamping plate 3 on one side is a layout with high front and low back, while the spherical movable support and support seat 4 on the movable clamping plate 3 on the other side is a layout with low front and high back, thereby forming a connection line between the spherical movable support and support seats 4 on the movable clamping plate 3 on the same side in the shape of an oblique line, and the connection lines formed by the spherical movable support and support seats 4 on different movable clamping plates 3 on both sides are in a cross-state. At this time, when the metal pipe passes through the front and rear through holes 201 opened on the positioning guide plate 2 from front to back in the horizontal direction, the driving device 8 drives the synchronous control mechanism 7 to control the movable clamping plates 3 on both sides to approach each other until the rolling ball heads 402 in the four spherical movable support seats 4 abut against the outer wall surface of the pipe at the same time, thereby supporting the lower part of the metal pipe and using the abutment of the upper rolling ball head 402 to lock and fix the metal pipe in the vertical plane without affecting the translational conveying and feeding of the pipe in the front and rear directions and the rotational movement around its own axis.

[0030] After a period of actual use, the actual degree of wear of each rolling ball head 402 component in the guide device is different. This is because, in the process of the metal pipe A being fed forward, the lower rolling ball head 402 not only applies the clamping and supporting force, but also needs to support the weight of the section of the pipe, which often leads to its aggravated wear; on the other hand, the actual surface roughness of the pipe is not uniform, so it will still cause uneven wear on each rolling ball head 402 as a supporting component. After taking into account the above-mentioned actual working conditions, in the embodiment of the present application, the connection structure between the aforementioned base part 401 and the movable clamping plate 3 is set as a threaded screwing structure 6. Then under this structure, the horizontal positioning position of multiple rolling ball heads 402 at different positions can be adjusted by rotating the base part 401, thereby ensuring that each rolling ball head 402 can maintain stable and reliable support and abutment with the metal pipe.

[0031] Embodiment 2: In this example, a low-wear guide device for metal pipe feeding is provided, which is further improved on the basis of the embodiment 1, that is, on the basis of the original two pairs of spherical movable support seats 4, a pair of support seat groups is further added at the rear, and the two spherical movable support seats 4 in the support seat group are also respectively located on the movable clamping plates 3 on both sides. Then, at this time, three spherical movable support seats 4 are respectively arranged on the movable clamping plates 3 on both sides, and the spherical movable support seats 4 on the movable clamping plate 3 on one side are arranged in a herringbone shape, and the spherical movable support seats 4 on the movable clamping plate 3 on the other side are arranged in an inverted herringbone shape. The reason for this structural design is that the inventor has found that if only two pairs of support seats arranged on both sides are used, then the front pair of spherical movable support seats 4 will generate an oblique first combined force on the metal pipe, driving the part of the pipe located in the guide device to twist in one direction, and the other pair of spherical movable support seats 4 on the rear side will also generate an oblique second combined force on the metal pipe, driving the part of the pipe located in the guide device to twist in this direction. At this time, when the metal pipe A passes through the guide device, a twisting effect will be generated on the pipe, causing the front and rear sections of the metal pipe A to twist. Compared with the scheme given in Example 1, since the spherical movable support seat 4 given in this embodiment adopts a three-stage structure, the two spherical movable support seats 4 in the middle group will become the fulcrum, and the two groups of spherical interactive support seats located at the front and rear ends respectively will generate opposite torsional moments after clamping. At this time, these two parts of moment will largely offset each other, thereby greatly reducing the torsional moment acting on the metal pipe part located outside the guide device, thereby ensuring the stability of the pipe during continuous feeding and processing, and can also effectively prevent the pipe from deformation and damage.

[0032] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A low-wear guide device for conveying and feeding metal pipes, characterized in that: The invention comprises a supporting base (1) at the bottom and two positioning guide plates (2) extending in the vertical direction respectively arranged at the front and rear ends of the supporting base (1); a pair of movable clamping plates (3) capable of horizontal translational movement are arranged between the two positioning guide plates (2); a plurality of spherical movable support seats (4) are also arranged on the inner side of the movable clamping plates (3); the spherical movable support seats (4) comprise a base portion (401) fixed to the movable clamping plate (3) and a rolling ball head (402) movably arranged at the front end of the base portion (401) and capable of rotating around its own center; the spherical movable support seat (4) can follow the movable clamping plate (3) to perform translational opening and closing movement, and utilize the rolling ball heads (402) on both sides to achieve clamping or loosening of the metal pipe (A) in a vertical plane.

2. The low-wear guide device for conveying and feeding metal pipes according to claim 1 is characterized in that: A translation guide structure (5) is formed between the positioning guide plate (2) and the movable clamping plate (3), wherein the translation guide structure (5) includes a guide slot (501) formed on the positioning guide plate (2), and guide portions (502) formed on both sides of the movable clamping plate (3), wherein the guide portions (502) are engaged in the guide slot (501) and are capable of translational movement along the guide slot (501); a through hole (201) is also provided on the positioning guide plate (2) for the metal pipe (A) to pass through.

3. The low-wear guide device for conveying and feeding metal pipes according to claim 2 is characterized in that: A pair of spherical movable support seats (4) are respectively provided on the movable clamping plates (3) on both sides, the connection line between the spherical movable support seats (4) on the movable clamping plates (3) on the same side is in the shape of an oblique line, and the connection lines formed by the spherical movable support seats (4) on different movable clamping plates (3) on both sides are in a mutually intersecting state.

4. The low-wear guide device for conveying and feeding metal pipes according to claim 2 is characterized in that: Three spherical movable support seats (4) are respectively arranged on the movable clamping plates (3) on both sides. The spherical movable support seats (4) on the movable clamping plate (3) on one side are arranged in a herringbone shape, and the spherical movable support seats (4) on the movable clamping plate (3) on the other side are arranged in an inverted herringbone shape.

5. The low-wear guide device for conveying and feeding metal pipes according to claim 3 or 4, characterized in that: A threaded screwing structure (6) for adjusting the horizontal position of the rolling ball head (402) is formed between the base portion (401) and the movable clamping plate (3).

6. The low-wear guide device for conveying and feeding metal pipes according to claim 5, characterized in that: A synchronous control mechanism (7) for controlling the synchronous opening and closing movement of the movable clamping plates (3) on both sides and a driving device (8) arranged on the supporting base (1) and driveably connected to the synchronous control mechanism (7) are also provided between the two movable clamping plates (3) and the supporting base (1).

7. The low-wear guide device for conveying and feeding metal pipes according to claim 6 is characterized in that: The synchronous control mechanism (7) includes a driving connecting rod (701) movably arranged on the supporting base (1), and the driving connecting rod (701) can rotate around a central axis along the vertical direction under the drive of the driving device (8). The driving connecting rod (701) is provided with synchronous guide hole grooves (702) arranged on both sides of the central axis. The bottoms of the two movable clamping plates (3) are also respectively formed with downwardly protruding synchronous opening and closing guide parts (703), and the synchronous opening and closing guide parts (703) are embedded in the synchronous guide hole grooves (702). The synchronous opening and closing guide parts (703) can reciprocate along the extension direction of the synchronous guide hole grooves (702) and rotate relative to the synchronous guide hole grooves (702), so that the movable clamping plates (3) on both sides are synchronously retracted or moved outward.

8. The low-wear guide device for conveying and feeding metal pipes according to claim 7 is characterized in that: A through strip guide groove (202) is also provided on the side of the positioning guide plate (2); the driving device (8) comprises a piston rod (801) capable of performing telescopic translational movement, and a swing connection section (802) is provided at the front end of the piston rod (801); a connecting extension section (7011) is formed at one end of the driving connecting rod (701), and the connecting extension section (7011) passes outward through the strip guide groove (101) and is hingedly connected to the swing connection section (802).

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