CN215849202U - Pipe tractor - Google Patents

Abstract

The application discloses tubular product tractor, including clamping device and draw gear, clamping device centre gripping tubular product, draw gear draws clamping device makes clamping device and tubular product synchronous motion, and clamping device includes anchor clamps and anchor clamps inside lining, and the anchor clamps inside lining is flexible material and covers the internal surface of anchor clamps. According to the pipe tractor, the contact surface between the clamping device and a pipe is increased by coating the inner surface of the clamping device with the flexible clamp lining, so that the friction force between the clamping device and the pipe is increased, stable and uniform clamping of the 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 tractor

Technical Field

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

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 tractor, which increases the contact surface between a clamping device and a pipe by coating a flexible clamp lining on the inner surface of the clamping device, so as to increase the friction force between the clamping device and the pipe, realize stable and uniform clamping of the 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 tractor is used for dragging a pipe and comprises a clamping device and a traction device, wherein the clamping device clamps the pipe, and the traction device pulls the clamping device to enable the clamping device and the pipe to move synchronously; the clamping device comprises a clamp and a clamp lining, wherein the clamp lining is made of flexible materials and covers the inner surface of the clamp. According to the pipe tractor, the contact surface between the clamping device and a pipe is increased by coating the inner surface of the clamping device with the flexible clamp lining, so that the friction force between the clamping device and the pipe is increased, stable and uniform clamping of the 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.

Preferably, the 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 clamping device can be improved.

Preferably, the clamping device is fixedly connected with a portal frame, the portal frame comprises a transmission system, and the transmission system is fixedly connected with the upper base frame to control the upper base frame to move up and down. The clamping device is connected with the portal frame, so that the mechanization of up-and-down movement of the clamping device can be realized, and the moving track of the upper clamp is set in advance, so that the upper clamp corresponds to the lower clamp in a holding position.

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 clamping device and the pipe is increased.

Preferably, the flexible material is polyurethane. The polyurethane has higher material strength and volume density, larger flexible deformation and strong capability of resisting external deformation, is not easy to crack under the action of external force, and effectively ensures the stability of the clamping device.

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 clamp lining is provided with a counter bore, the clamp is provided with a threaded hole corresponding to the counter bore, and the fastener penetrates through the counter bore and the threaded hole to be fixedly connected with the clamp lining and the clamp. The setting of counter sink makes the fastener can not the fish tail tubular product surface, can not cause the production waste.

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 arranged at two ends of the clamp respectively, 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.

Preferably, the contact surface of the clamp lining and the pipe is provided with a pattern. The setting up of decorative pattern makes when clamping device receives clamping-force anchor clamps inside lining can the abundant deformation, increases the contact surface of anchor clamps inside lining and tubular product.

Drawings

Fig. 1 is a schematic structural diagram of a pipe tractor 1000 according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a lower pedestal 1222, a lower clamp 1212, and a lower clamp liner 1232 according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a lower jig lining 2232 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 embodiment provides a pipe drawing machine 1000 for drawing a pipe 1100, which includes a clamping device 1200 and a drawing device 1300, wherein the clamping device 1200 clamps the pipe 1100, and the drawing device 1300 draws the clamping device 1200 to make the clamping device 1200 move synchronously with the pipe 1100; the clamp device 1200 includes a clamp 1210 and a clamp liner (not shown in fig. 1) that is polyurethane and covers the inner surface of the clamp 1210. 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, clamping device 1200's stability has been guaranteed effectively, so when the anchor clamps inside lining centre gripping tubular product 1100 that tubular product tractor 1000 adopted the polyurethane material to make, polyurethane receives to produce flexible deformation behind the clamping-force, thereby the contact surface between clamping device 1200 and the tubular product 1100 has been increased, and then increase the frictional force between clamping device 1200 and the tubular product 1100, make can realize clamping device 1200's stable even centre gripping with less clamping-force, avoided appearing stress concentration in the clamping process and lead to tubular product 1100 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 this embodiment, the clamping device 1200 further includes a base frame 1220, the base frame 1220 includes an upper base frame 1221 and a lower base frame 1222 disposed opposite to each other, the clamp 1210 includes an upper clamp 1211 and a lower clamp 1212 disposed opposite to each other, the clamp liner includes an upper clamp liner (not shown in fig. 2) and a lower clamp liner 1232 disposed opposite to each other, the upper clamp 1211 and the lower clamp 1212 have the same structure, the upper base frame 1221 and the lower base frame 1222 have the same structure, and the upper clamp liner and the lower clamp liner 1232 have the same structure. The corresponding engagement of the upper clamp 1211 and the lower clamp 1212 causes the corresponding engagement of the upper clamp liner 1232 and the lower clamp liner 1232, forming a cavity therebetween for gripping the tubing 1100. The upper base frame 1221 is fixedly connected with the outer surface of the upper clamp 1211, the lower base frame 1222 is fixedly connected with the outer surface of the lower clamp 1212, the upper base frame 1221 and the lower base frame 1222 are both connected with the portal frame 1400, the portal frame 1400 comprises a transmission system, and the transmission system is connected with the upper base frame 1221 so as to control the upper base frame 1221 to move up and down, so that the upper clamp 1211 and the lower clamp 1212 can be opened and closed conveniently, and the operation is convenient. The base frame 1220 including the upper base frame 1221 and the lower base frame 1222 may facilitate the connection of the base frame 1220 with the gantry 1400, and may improve the overall strength of the clamping device 1200. The clamping device 1200 is connected with the portal frame 1400, so that the mechanization of up-and-down movement of the clamping device 1200 can be realized, and the moving track of the upper clamp 1211 is set in advance, so that the upper clamp 1211 and the lower clamp 1212 keep corresponding in position, the position matching is accurate during opening and closing, and the pipe 1100 can be stably and uniformly clamped. The drawing means 1300 includes a guide bar 1310, and the guide bar 1310 is connected to the gantry 1400 by a slide rail so that the clamping means 1200 provided on the gantry 1400 under the drawing of the drawing means 1300 can move along a path provided by the guide bar 1310.

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 1211 and the lower clamp 1212 have the same structure, the upper base frame 1221 and the lower base frame 1222 have the same structure, and the upper clamp liner and the lower clamp liner 1232 have the same structure, so the following clamps 1212, the lower base frame 1222, and the lower clamp liner 1232 are taken as examples to describe specific structures and connections, and the structures of the upper clamp 1211, the upper base frame 1221, and the upper clamp liner correspond to the structures of the lower clamp 1212, the lower base frame 1222, and the lower clamp liner 1232, and are not described again.

In this embodiment, the tube 1100 is a hollow cylindrical tube 1100, the cross sections of the lower clamp 1212 and the lower clamp liner 1232 are semicircular, the inner diameter of the lower clamp 1212 is the same as the outer diameter of the lower clamp liner 1232, the inner diameter of the lower clamp liner 1232 is slightly smaller than the outer diameter of the tube 1100, the lower clamp liner 1232 is flexibly deformed after receiving a clamping force, the inner diameter of the lower clamp liner 1232 after being flexibly deformed is the same as the outer diameter of the tube 1100, so that the contact area between the lower clamp 1212 and the lower clamp liner 1232 is maximized, the contact area between the lower clamp liner 1232 and the tube 1100 is maximized, thereby increasing the friction force between the clamping device 1200 and the tube 1100, so that the stable and uniform clamping of the clamping device 1200 can be realized by using a smaller clamping force, and the deformation damage of the tube 1100 caused by stress concentration in the clamping process is avoided. The two axial side end surfaces of the lower clamp 1212 and the two axial side end surfaces of the lower clamp liner 1232 along the pipe 1100 are flush, so that the fixed connection rear end surfaces of the lower clamp 1212 and the lower clamp liner 1232 are flat. When clamping the pipe 1100, there is a gap between the upper clamp 1211 and the lower clamp 1212, and the gap is set such that a clamping force can act on the clamp liner, so that the clamp liner deforms, increasing the contact surface of the clamp liner with the pipe 1100, thereby increasing the friction force between the clamp liner and the pipe 1100, so that clamping is effective without interaction of the clamping force on the upper clamp 1211 and the lower clamp 1212. In this embodiment, the distance between the upper clamp 1211 and the lower clamp 1212 is determined by the clamping force and the thickness of the clamp liner, so that when the clamping device 1200 is subjected to the maximum clamping force, the gap between the upper clamp 1211 and the lower clamp 1212 is still maintained.

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, the lower clamp liner 1232 is provided with a countersunk hole 1233, the lower clamp 1212 is provided with a threaded hole (not shown in fig. 2) corresponding to the position of the countersunk hole 1233, and the fastener passes through the countersunk hole 1233 and the threaded hole to fixedly connect the lower clamp liner 1232 and the lower clamp 1212. The counter sink 1233 can prevent the protrusion of the fastener, ensure the flatness of the surface of the lower clamp liner 1232 contacting the pipe 1100, and prevent the protruding fastener from scratching the outer surface of the pipe 1100. Lower clamp inside lining 1232 adopts the fastener to link to each other with lower clamp 1212, compares in the viscose technology, and both connect more effectively and the hold time is more of a specified duration, and lower clamp inside lining 1232 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 1100 on the anchor clamps 1212, set up a plurality of second recesses on the axial both sides terminal surface of edge tubular product 1100 on the anchor clamps inside lining 1232 down, a plurality of second recesses correspond with a plurality of first recess positions, first recess and second recess are the rectangular groove 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 1212 down, the width of second recess is less than the thickness of anchor clamps inside lining 1232 down, furtherly, the width of second recess is less than the thickness after anchor clamps inside lining 1232 centre gripping tubular product 1100 takes place elastic deformation down. Lower limiting plate 1240 is arranged in the large rectangular groove, the lower limiting plate 1240 is a rectangular plate with the shape matched with that of the large rectangular groove, the lower limiting plate 1240 is connected with the lower clamp 1212 through bolts, and the lower clamp liner 1232 is limited from the side to move along the radial direction of the lower clamp liner 1232, so that the connection between the lower clamp liner 1232 and the lower clamp 1212 is more reliable. A plurality of first recess equipartitions set up on the axial terminal surface of anchor clamps 1212 down, correspondingly, a plurality of second recess equipartitions set up on the axial terminal surface of anchor clamps inside lining 1232 down, can guarantee to connect down the uniform stress behind limiting plate 1240. In other embodiments, the first grooves and the second grooves may not be uniformly distributed.

Two lower clamping plates 1250 are respectively arranged at two ends of the lower clamp 1212, each lower clamping plate 1250 is a semicircular ring, the ring width of each lower clamping plate 1250 is larger than that of the lower clamp 1212, the outer diameter of each lower clamping plate 1250 is the same as that of the lower clamp 1212, the inner diameter of each lower clamping plate 1250 is smaller than that of the lower clamp 1212 and the inner diameter of each lower clamping plate 1250 is larger than that of the lower clamp liner 1232, the outer surface of each lower clamping plate 1250 is aligned with the outer surface of the lower clamp 1212, the axial end face of each lower clamping plate 1250 and the axial end face of the lower clamp 1212 are located on the same horizontal plane, the two lower clamping plates 1250 at two ends of the lower clamp 1212 clamp liner 1232 clamp fixedly, and accordingly the lower clamping plates 1250 can limit the axial movement of the lower clamp liner 1232 along the pipe 1100. Set up a plurality of screw holes on the radial terminal surface of anchor clamps 1212 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 1212 down on the grip block 1250, the bolt passes mounting hole and screw hole connection grip block 1250 and anchor clamps 1212 down in proper order, the connection structure of dismantlement is convenient for down the installation of anchor clamps inside lining 1232, make down anchor clamps inside lining 1232 can remove the installation along the axial of tubular product 1100, again restrict the axial displacement of anchor clamps inside lining 1232 down, but must remove the installation along tubular product 1100's radial, and there is certain fault-tolerant rate when preliminary installation.

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 1222 includes a lower base plate 1223 and six lower connecting plates 1224, the six lower connecting plates 1224 are parallel to each other and vertically arranged on the same side of the lower base plate 1223, and the intervals between the lower connecting plates 1224 are uniform and comb-shaped. One end of the lower connecting plate 1224 is connected to the lower plate 1223, the other end is connected to the lower clamp 1212, and a connecting groove is formed at the end of the lower connecting plate 1224 connected to the lower clamp 1212, and matches with the outer surface of the lower clamp 1212, so that the connecting groove can be clamped to the lower clamp 1212. One side of the lower plate 1223 is fixedly connected with the lower connecting plate 1224, and the other side is fixedly connected with the portal frame 1400. The lower connecting plate 1224 is connected with the lower base plate 1223 and the lower clamp 1212 through welding, so that the connection stability is ensured. The lower base frame 1222 is arranged between the portal frame 1400 and the lower clamp 1212, so that the lower clamp 1212 can be conveniently connected with the portal frame 1400, and the six uniformly distributed lower connecting plates 1224 are arranged, so that clamping force can be uniformly dispersed, and uniform and stable stress can be effectively guaranteed.

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 tractor 1000 of this embodiment increases the contact surface between the clamping device 1200 and the pipe 1100 by coating polyurethane on the inner surface of the clamping device 1200, thereby increasing the friction between the clamping device 1200 and the pipe 1100, enabling stable and uniform clamping of the clamping device 1200 to be achieved with a small clamping force, and avoiding deformation and damage of the pipe 1100 due to stress concentration during the clamping process.

Example two:

the present embodiment provides another pipe tractor, which is different from the first embodiment in that, for example, the lower clamp liner 2232 is, as shown in fig. 3, the inner surface of the lower clamp liner 2232 of the present embodiment is provided with a pattern 2234, and the inner surface of the upper clamp liner is provided with the same pattern, which is not described again here. The pattern 2234 is in contact with the tubing. The pattern 2234 allows the liner to deform sufficiently when the clamping device is subjected to a clamping force, increasing the contact surface between the liner and the pipe.

In this embodiment, the pattern 2234 is a diamond pattern 2234, the diamond pattern 2234 can increase the anti-slip and wear-resistant properties of the surface of the lining of the fixture, and the pattern 2234 can be integrally formed during the production of the lining of the fixture without additional engraving, which saves 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 independently according to the difference of the stress or the difference of the requirement of the upper clamp liner and the lower clamp liner.

The tubular product tractor of this embodiment is through setting up decorative pattern 2234 on the internal surface at the 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 clamping device's stable even centre gripping with less clamping-force, avoided appearing stress concentration at 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 constructions and materials, including combinations of features disclosed herein either individually or in any combination, will be apparent to those skilled in the art upon studying the disclosure. 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 (10)

1. The utility model provides a tubular product tractor for pull tubular product, its characterized in that: the pipe drawing device comprises a clamping device and a drawing device, wherein the clamping device clamps the pipe, and the drawing device draws the clamping device to enable the clamping device and the pipe to move synchronously;

the clamping device comprises a clamp and a clamp lining, wherein the clamp lining is made of flexible materials and covers the inner surface of the clamp.

2. The pipe tractor of claim 1, wherein: the clamping device further comprises a base frame, 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.

3. The pipe tractor of claim 2, wherein: the clamping device is fixedly connected with a portal frame, the portal frame comprises a transmission system, and the transmission system is fixedly connected with the upper base frame to control the upper base frame to move up and down.

4. The pipe tractor of claim 2, wherein: the cross sections of the upper clamp, the lower clamp, the upper clamp lining and the lower clamp lining are semicircular rings.

5. The pipe tractor of claim 1, wherein: the flexible material is polyurethane.

6. The pipe tractor of claim 1, wherein: the clamp lining and the clamp are detachably and fixedly connected.

7. The pipe tractor of claim 1, wherein: the fixture comprises a fixture lining and a fastener, wherein a counter bore is formed in the fixture lining, a threaded hole corresponding to the counter bore is formed in the fixture, and the fastener penetrates through the counter bore and is fixedly connected with the fixture lining and the fixture.

8. The pipe tractor 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 pipe tractor 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.

10. The pipe tractor of claim 1, wherein: the contact surface of the clamp lining and the pipe is provided with decorative patterns.

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