CN216730617U - Pipe clamping device - Google Patents

Abstract

The application discloses tubular product clamping device, including anchor clamps and anchor clamps inside lining, the anchor clamps inside lining is flexible material and covers the internal surface of anchor clamps. According to the pipe clamping device, the contact surface between the pipe clamping device and a pipe is increased by coating the inner surface of the clamp with the flexible clamp lining, so that the friction force between the pipe clamping device and the pipe is increased, the stable and uniform clamping of the pipe clamping device can be realized by using smaller clamping force, and the pipe deformation damage caused by stress concentration in the clamping process is avoided.

Description

Pipe clamping device

Technical Field

The application relates to the technical field of pipe production equipment, in particular to a pipe clamping device.

Background

The production process of the pipe comprises forming, clamping, drawing and cutting. At present, two traction methods of crawler clamping or hydraulic reciprocating alternate clamping are usually adopted for clamping and traction, and the crawler clamping has the advantages of simple framework and large clamping surface area, is commonly used on solid small-specification pipes, but cannot be used for hollow pipes, particularly large-specification/thin products; for hollow pipes, a hydraulic reciprocating alternative clamping traction method is often adopted, clamps with corresponding specifications are required to be matched for clamping, and the traction requirement of stable clamping is met, but the existing clamps are often made of integral nylon or iron rubber clamps, cannot bear large clamping force in the use process, and stress concentration is easily generated in the clamping process to cause deformation and damage of the pipes.

SUMMERY OF THE UTILITY MODEL

In view of the defects of the prior art, the utility model aims to provide a pipe clamping device, which increases the contact surface between the pipe clamping device and a pipe by coating a flexible clamp lining on the inner surface of a clamp, so as to increase the friction force between the pipe clamping device and the pipe, realize stable and uniform clamping of the pipe clamping device by using smaller clamping force, and avoid deformation and damage of the pipe caused by stress concentration in the clamping process.

In order to achieve the purpose, the technical means adopted by the utility model are as follows: a pipe clamping device is used for drawing a pipe and comprises a clamp and a clamp lining, wherein the clamp lining is made of a flexible material and covers the inner surface of the clamp. According to the pipe clamping device, the contact surface between the pipe clamping device and a pipe is increased by coating the flexible clamp lining on the inner surface of the clamp, so that the friction force between the pipe clamping device and the pipe is increased, stable and uniform clamping of the pipe clamping device can be realized by using smaller clamping force, and deformation and damage of the pipe caused by stress concentration in the clamping process are avoided.

Preferably, the pipe clamping device further comprises a base frame, the base frame comprises an upper base frame and a lower base frame which are arranged oppositely, the clamp comprises an upper clamp and a lower clamp which are arranged oppositely, the clamp lining comprises an upper clamp lining and a lower clamp lining which are arranged oppositely, the upper base frame is fixedly connected with the outer surface of the upper clamp, the upper clamp lining is fixedly connected with the inner surface of the upper clamp, the lower base frame is fixedly connected with the outer surface of the lower clamp, and the lower clamp lining is fixedly connected with the inner surface of the lower clamp. The base frame is arranged on the outer side of the clamp, so that the clamp can be conveniently connected with the portal frame, and the overall strength of the pipe clamping device can be improved.

Preferably, the upper clamp, the lower clamp, the upper clamp liner and the lower clamp liner are semicircular in cross section. The shapes of the upper clamp, the lower clamp, the upper clamp lining and the lower clamp lining are matched with the pipe, so that the contact area between the clamp lining and the pipe is maximized, and the friction force between the pipe clamping device and the pipe is increased.

Preferably, the base frame includes a base plate and a connecting plate perpendicular to the base plate and connecting the base plate and an outer surface of the jig. The bottom plate is used for connecting the portal frame, has avoided portal frame and anchor clamps directly to link to each other, causes the destruction of anchor clamps, and the connecting plate has improved the holistic bearing strength of tubular product clamping device, reduces the tubular product risk of breaking.

Preferably, a connecting groove is formed in the connecting plate, and the connecting groove is clamped with the clamp. The arrangement of the grooves enables the clamp to be completely matched with the connecting plate, and the bearing strength of the connecting plate is improved.

Preferably, the clamp lining and the clamp are detachably and fixedly connected. The clamp lining is detachably and fixedly connected with the clamp, so that the clamp lining is convenient to replace.

Preferably, the contact surface of the clamp lining and the pipe is provided with a pattern. The arrangement of the patterns enables the inner lining of the clamp to be fully deformed when the pipe clamping device is subjected to clamping force, and the contact surface between the inner lining of the clamp and the pipe is increased.

Preferably, the flexible material is polyurethane. The polyurethane has higher material strength and volume density, larger flexible deformation, strong capability of resisting external deformation, difficult occurrence of cracks under the action of external force and effectively ensured stability of the pipe clamping device.

Preferably, the end faces of the two sides of the clamp along the axial direction of the pipe are provided with a plurality of first grooves, the end faces of the clamp lining along the two sides of the pipe along the axial direction of the pipe are provided with a plurality of second grooves, the positions of the plurality of second grooves correspond to the positions of the plurality of first grooves, and limiting plates are arranged in the first grooves and the second grooves. The limiting plate, the first groove and the second groove are arranged to laterally fix the clamp lining on the inner surface of the clamp, so that the clamp lining is more reliably connected with the clamp.

Preferably, two clamping plates are respectively arranged at two ends of the clamp, the two clamping plates clamp and fix the clamp lining, and the clamping plates at two ends of the clamp limit the clamp lining to move along the axial direction of the pipe.

Drawings

Fig. 1 is a schematic structural diagram of a tube clamping device 100 according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of the lower pedestal 122, the lower clamp 112 and the lower clamp liner 132 according to the first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a lower clamp liner 232 according to a second embodiment of the present invention.

Detailed Description

As required, detailed embodiments of the present invention are disclosed herein. However, it is to be understood that the disclosed embodiments are merely exemplary of the utility model, which may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed manner, including employing various features disclosed herein in combination with features that may not be explicitly disclosed herein.

The first embodiment is as follows:

as shown in fig. 1, the present embodiment provides a pipe clamping device 100 for clamping a pipe 10, comprising a clamp 110 and a clamp liner (not shown in fig. 1), wherein the clamp liner is made of polyurethane and covers the inner surface of the clamp 110. Polyurethane's material strength and bulk density are higher, the flexible deformation volume is great, it can the reinforce to resist external deformability, under the exogenic action, difficult emergence crack, pipe clamping device 100's stability has been guaranteed effectively, so when pipe clamping device 100 adopted the anchor clamps inside lining centre gripping tubular product 10 that polyurethane material made, polyurethane receives to produce flexible deformation behind the clamping-force, thereby increased the contact surface between pipe clamping device 100 and the tubular product 10, and then increase the frictional force between pipe clamping device 100 and the tubular product 10, make can realize the stable even centre gripping of pipe clamping device 100 with less clamping-force, avoided appearing stress concentration in the clamping-process and lead to tubular product 10 deformation damage.

In other embodiments, the clamp liner may be made of other flexible materials, which is a broad concept, and in terms of rigid materials, i.e., materials with certain softness and flexibility, such as rubber, etc., as long as it is ensured that the clamp liner can generate certain elastic deformation so that the clamp liner can be in full contact with the pipe and stably and uniformly clamp the pipe.

Referring to fig. 2, in the present embodiment, the pipe clamping device 100 further includes a base frame 120, the base frame 120 includes an upper base frame 121 and a lower base frame 122 which are oppositely disposed, the clamp 110 includes an upper clamp 111 and a lower clamp 112 which are oppositely disposed, the clamp liner includes an upper clamp liner (not shown in fig. 2) and a lower clamp liner 132 which are oppositely disposed, the upper clamp 111 and the lower clamp 112 have the same structure, the upper base frame 121 and the lower base frame 122 have the same structure, and the upper clamp liner and the lower clamp liner 132 have the same structure. The upper clamp 111 and the lower clamp 112 are correspondingly engaged such that the upper clamp liner and the lower clamp liner 132 are correspondingly engaged, the upper clamp liner and the lower clamp liner 132 forming a cavity therebetween for clamping the pipe 10. Go up the pedestal 121 and be connected with the outer fixed surface of last anchor clamps 111, lower pedestal 122 is connected with the outer fixed surface of lower anchor clamps 112, goes up pedestal 121 and lower pedestal 122 and all links to each other with the portal frame, and the portal frame includes transmission system, thereby transmission system links to each other with last pedestal 121 and controls upper pedestal 121 and reciprocate to be convenient for open and shut upper clamp 111 and lower anchor clamps 112, convenient operation. The base frame 120 comprises the upper base frame 121 and the lower base frame 122, so that the connection between the base frame 120 and the gantry can be facilitated, and the overall strength of the pipe clamping device 100 can be improved. The pipe clamping device 100 is connected with the portal frame, so that the mechanization of up-and-down movement of the pipe clamping device 100 can be realized, the moving track of the upper clamp 111 is set in advance, the upper clamp 111 and the lower clamp 112 keep corresponding in position, the position matching is accurate during opening and closing, and the pipe 10 can be stably and uniformly clamped.

In other embodiments, the structure of the upper clamp and the lower clamp, the structure of the upper pedestal and the lower pedestal, and the structure of the upper clamp liner and the lower clamp liner may not be identical as long as the pipe can be clamped.

In other embodiments, the clamp may be divided into a left part and a right part, and the left part and the right part are clamped along the horizontal direction, or the two parts of the clamp are arranged along other directions, as long as the pipe can be clamped.

In other embodiments, the connection between the gantry and the fixture can be realized by other devices, or the fixture can be directly connected with the gantry, as long as the fixture is effectively connected with the gantry.

In this embodiment, the upper clamp 111 and the lower clamp 112 have the same structure, the upper pedestal 121 and the lower pedestal 122 have the same structure, and the upper clamp liner and the lower clamp liner 132 have the same structure, so the following clamps 112, the lower pedestal 122, and the lower clamp liner 132 are taken as examples to perform specific structural and connection descriptions, and the structures of the upper clamp 111, the upper pedestal 121, and the upper clamp liner correspond to the structures of the lower clamp 112, the lower pedestal 122, and the lower clamp liner 132, and are not described again.

In this embodiment, the pipe 10 is a hollow cylindrical pipe 10, the cross sections of the lower clamp 112 and the lower clamp lining 132 are semicircular, the inner diameter of the lower clamp 112 is the same as the outer diameter of the lower clamp lining 132, the inner diameter of the lower clamp lining 132 is slightly smaller than the outer diameter of the pipe 10, the lower clamp lining 132 is flexibly deformed after receiving clamping force, the inner diameter of the lower clamp lining 132 after being flexibly deformed is the same as the outer diameter of the pipe 10, the contact area between the lower clamp 112 and the lower clamp lining 132 is maximized, the contact area between the lower clamp lining 132 and the pipe 10 is maximized, friction between the pipe clamping device 100 and the pipe 10 is increased, stable and uniform clamping of the pipe clamping device 100 can be realized by using a small clamping force, and deformation damage of the pipe 10 caused by stress concentration in the clamping process is avoided. The two axial end surfaces of the lower clamp 112 along the pipe 10 are flush with the two axial end surfaces of the lower clamp lining 132 along the pipe 10, so that the end surfaces of the lower clamp 112 and the lower clamp lining 132 after being fixedly connected are flat. When clamping tubular product 10, there is the clearance between upper clamp 111 and lower clamp 112, and the setting in clearance makes clamping-force can act on the anchor clamps inside lining for the anchor clamps inside lining takes place deformation, increases the contact surface of anchor clamps inside lining and tubular product 10, thereby increases the frictional force between anchor clamps inside lining and the tubular product 10, makes the centre gripping effective, and can not make clamping-force interact on upper clamp 111 and lower clamp 112. In this embodiment, the distance between the upper clamp 111 and the lower clamp 112 is determined by the clamping force and the thickness of the clamp liner, so that when the pipe clamping device 100 receives the maximum clamping force, the gap between the upper clamp 111 and the lower clamp 112 still exists.

In other embodiments, when the tubular product is cuboid or prismatic, the shape of anchor clamps and anchor clamps inside lining changes thereupon, guarantees anchor clamps and anchor clamps inside lining, anchor clamps inside lining and tubular product shape match and closely laminate.

In this embodiment, a countersunk hole 133 is formed in the lower clamp liner 132, a threaded hole (not shown in fig. 2) corresponding to the position of the countersunk hole 133 is formed in the lower clamp 112, and a fastener passes through the countersunk hole 133 and fixedly connects the lower clamp liner 132 and the lower clamp 112. Counter bore 133 prevents protrusion of the fastener, ensures flatness of the surface of lower clamp liner 132 in contact with tubular 10, and prevents the protruding fastener from scratching the outer surface of tubular 10. Lower clamp inside lining 132 adopts the fastener to link to each other with lower clamp 112, compares and glues the technology, and both connect more effectively and the holding time is more of a specified duration, and lower clamp inside lining 132 can conveniently realize dismantling the change, is convenient for install and maintain. Set up a plurality of first recesses on the axial both sides terminal surface of edge tubular product 10 on the anchor clamps 112 down, set up a plurality of second recesses on the axial both sides terminal surface of edge tubular product 10 on the anchor clamps inside lining 132 down, a plurality of second recesses correspond with a plurality of first recess positions, first recess is the rectangular groove with the second recess and the sunken degree of depth and the sunken length of first recess and second recess are all unanimous, make first recess and second recess can correspond to match and become a big rectangular groove, and the width of first recess is unanimous with the thickness of anchor clamps 112 down, the width of second recess is less than the thickness of anchor clamps inside lining 132 down, furtherly, the width of second recess is less than the thickness after anchor clamps inside lining 132 centre gripping tubular product 10 takes place elastic deformation down. The lower limiting plate 140 is arranged in the large rectangular groove, the lower limiting plate 140 is a rectangular plate matched with the large rectangular groove in shape, the lower limiting plate 140 is connected with the lower clamp 112 through bolts, the radial movement of the lower clamp lining 132 is limited from the side, and therefore the connection between the lower clamp lining 132 and the lower clamp 112 is more reliable. The first grooves are uniformly distributed on the axial end face of the lower clamp 112, and correspondingly, the second grooves are uniformly distributed on the axial end face of the lower clamp liner 132, so that the uniform stress can be ensured after the lower limiting plate 140 is connected. In other embodiments, the first grooves and the second grooves may not be uniformly distributed.

Two lower clamping plates 150 are respectively arranged at two ends of the lower clamp 112, each lower clamping plate 150 is a semicircular ring, the ring width of each lower clamping plate 150 is larger than that of the lower clamp 112, the outer diameter of each lower clamping plate 150 is the same as that of the lower clamp 112, the inner diameter of each lower clamping plate 150 is smaller than that of the lower clamp 112, the inner diameter of each lower clamping plate 150 is larger than that of the lower clamp lining 132, the outer surface of each lower clamping plate 150 is aligned with the outer surface of the lower clamp 112, the axial end face of each lower clamping plate 150 and the axial end face of the lower clamp 112 are located on the same horizontal plane, the two lower clamping plates 150 at two ends of the lower clamp 112 clamp lining 132 clamp and fix the lower clamp lining 132, and accordingly the lower clamping plates 150 limit the axial movement of the lower clamp lining 132 along the pipe 10. Set up a plurality of screw holes on the radial terminal surface of anchor clamps 112 down, a plurality of mounting holes are set up with a plurality of screw hole position correspondences on the radial terminal surface of anchor clamps 112 down on the grip block 150, the bolt passes grip block 150 and lower anchor clamps 112 under mounting hole and the screw hole connection in proper order, the connection structure of dismantlement is convenient for the installation of lower anchor clamps inside lining 132, make lower anchor clamps inside lining 132 can remove the installation along the axial of tubular product 10, restrict the axial displacement of lower anchor clamps inside lining 132 again, but must remove the installation along the radial of tubular product 10, and there is certain fault-tolerant rate when primary erection.

In other embodiments, the lower clamp liner and the lower clamp may be joined by an adhesive process, so long as an effective connection between the two is ensured. In addition, a bolt may be screwed in from the lower clamp end so that the bolt can connect the lower clamp and the lower clamp liner, and the bottom of the bolt may not penetrate the lower clamp liner.

In other embodiments, the tip of lower anchor clamps can set up along the radial inside arch of tubular product by integrated into one piece, and bellied shape can be the semicircle ring, also can be other shapes, and the arch need be guaranteed not to contact with tubular product, and can restrict down the anchor clamps inside lining along the axial displacement of tubular product can, then need not to set up in addition grip block this moment, need not the installation operation, and is more simple and convenient.

In other embodiments, the end portion of one side of the lower clamp can be integrally formed to be provided with a protrusion which is inward along the radial direction of the pipe, the protrusion can be in a semicircular shape or in other shapes, the protrusion is required to be prevented from contacting the pipe and can limit the inner lining of the lower clamp to move along the axial direction of the pipe, the end portion of the other side of the lower clamp is provided with the lower clamping plate, the inner lining of the lower clamp can be placed into the end portion of the lower clamping plate, and the lower clamp is easy and convenient to install.

In other embodiments, the axial end surface of the lower clamp plate may be lower than the axial end surface of the lower clamp, as long as the axial movement of the lower clamp liner along the pipe is limited and the clamping of the upper clamp and the lower clamp is not affected.

In this embodiment, the lower base frame 122 includes a lower base plate 123 and six lower connecting plates 124, the six lower connecting plates 124 are parallel to each other and vertically arranged on the same side of the lower base plate 123, and the intervals between the lower connecting plates 124 are consistent and are comb-shaped. One end of the lower connecting plate 124 is connected with the lower base plate 123, the other end is connected with the lower clamp 112, a connecting groove is arranged at the end of the lower connecting plate 124 connected with the lower clamp 112, and the connecting groove is matched with the outer surface of the lower clamp 112, so that the connecting groove can be clamped with the lower clamp 112. One side of the lower bottom plate 123 is fixedly connected with the lower connecting plate 124, and the other side is fixedly connected with the portal frame. The lower connecting plate 124 is connected with the lower bottom plate 123 and the lower clamp 112 through welding, so that the connection stability is ensured. Set up bed frame 122 down between portal frame and lower anchor clamps 112, be convenient for lower anchor clamps 112 and portal frame link to each other, set up the lower connecting plate 124 of six equipartitions and can make clamping-force homodisperse, effectively guarantee that the atress is even stable.

In other embodiments, the number of the lower connecting plates is not limited, the intervals between the lower connecting plates are not required to be the same, and the lower connecting plates can be connected with the lower bottom plate and the lower clamp through bolts and other modes as long as the connecting strength can be ensured.

The pipe clamping device 100 of the embodiment increases the contact surface between the pipe clamping device 100 and the pipe 10 by coating polyurethane on the inner surface of the clamp 110, so that the friction force between the pipe clamping device 100 and the pipe 10 is increased, stable and uniform clamping of the pipe clamping device 100 can be realized by using smaller clamping force, and deformation and damage of the pipe 10 caused by stress concentration in the clamping process are avoided.

Example two:

the present embodiment provides another tube clamping device, which is different from the first embodiment in that, for example, the lower clamp liner 232 is shown in fig. 3, the inner surface of the lower clamp liner 232 of the present embodiment is provided with patterns 234, and the inner surface of the upper clamp liner is provided with the same patterns, which are not described herein again. Pattern 234 contacts the tubing. The pattern 234 allows the liner of the clamp to deform sufficiently when the tube clamping device is subjected to a clamping force, and the contact surface between the liner of the clamp and the tube is increased.

In this embodiment, the pattern 234 is a diamond pattern 234, the diamond pattern 234 can increase the anti-slip and wear-resistant performance of the surface of the clamp lining, and the pattern 234 can be integrally formed during the production of the clamp lining, and does not need to be additionally engraved, thereby saving time.

In other embodiments, the shape of the pattern is not limited and reference may be made to various patterns of a vehicle tire.

In other embodiments, the patterns on the upper clamp liner and the lower clamp liner may not be completely the same, and may be set individually according to the difference of the stresses or the difference of the requirements of the upper clamp liner and the lower clamp liner.

The pipe clamping device of this embodiment sets up decorative pattern 234 on the internal surface through anchor clamps inside lining for anchor clamps inside lining and tubular product fully contact, increased the frictional force of anchor clamps inside lining and tubular product, make can realize pipe clamping device's stable even centre gripping with less clamping-force, avoided appearing stress concentration in the clamping process and lead to tubular product deformation damage.

While the specification and features of the present application have been described above, it will be understood that various changes and modifications in the above-described structures and materials, including combinations of features disclosed herein either individually or as claimed herein, may be suggested to one skilled in the art and are to be included within the spirit and purview of this application. Such variations and/or combinations are within the skill of the art to which the utility model pertains and are within the scope of the following claims.

Claims (9)

1. A tubular product clamping device for centre gripping tubular product, its characterized in that: the pipe clamping device comprises a base frame, a clamp and a clamp lining, wherein the base frame is fixedly connected with the outer surface of the clamp, and the clamp lining is made of flexible materials and covers the inner surface of the clamp;

the base frame comprises an upper base frame and a lower base frame which are oppositely arranged, the clamp comprises an upper clamp and a lower clamp which are oppositely arranged, and the clamp lining comprises an upper clamp lining and a lower clamp lining which are oppositely arranged;

the upper base frame is fixedly connected with the outer surface of the upper clamp, the upper clamp lining is fixedly connected with the inner surface of the upper clamp, the lower base frame is fixedly connected with the outer surface of the lower clamp, and the lower clamp lining is fixedly connected with the inner surface of the lower clamp.

2. The tube gripping device of claim 1, wherein: the cross sections of the upper clamp, the lower clamp, the upper clamp lining and the lower clamp lining are semicircular rings.

3. The tube gripping device of claim 1, wherein: the base frame includes a bottom plate and a connecting plate perpendicular to the bottom plate and connecting the bottom plate and an outer surface of the jig.

4. A tube gripping device according to claim 3, wherein: and a connecting groove is arranged on the connecting plate and clamped with the clamp.

5. The tube gripping device of claim 1, wherein: the clamp lining and the clamp are detachably and fixedly connected.

6. The tube gripping device of claim 1, wherein: the contact surface of the clamp lining and the pipe is provided with decorative patterns.

7. The tube gripping device of claim 1, wherein: the flexible material is polyurethane.

8. The tube gripping device of claim 1, wherein: the anchor clamps are followed set up a plurality of first recesses on the axial both sides terminal surface of tubular product, the anchor clamps inside lining is followed set up a plurality of second recesses on the axial both sides terminal surface of tubular product, it is a plurality of the second recess corresponds with a plurality of first recess position, first recess with set up the limiting plate in the second recess.

9. The tube gripping device of claim 1, wherein: two ends of the clamp are respectively provided with two clamping plates, and the two clamping plates clamp and fix the clamp lining.

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