CN216265574U - Pipe clamp - Google Patents

Abstract

The application relates to a pipe clamp, including two anchor clamps subassemblies that the symmetry set up, every anchor clamps subassembly includes the clamp splice seat and sets up two clamp splices on the clamp splice seat side by side, still includes: the plug is fixed between the two clamping blocks on the clamping block seat and is provided with a conical surface which is gradually reduced from a first end close to the clamping block seat to a second end far away from the clamping block seat; the expansion pipe is sleeved on the conical surface of the plug and provided with an outer conical surface and an inner conical surface, the inner conical surface and the conical surface of the plug are arranged in a reverse mode, and the outer conical surface and the inner conical surface are arranged in a reverse mode; and when the pipe to be clamped is sleeved on the outer conical surface of the expansion pipe, the plug is inserted into the expansion pipe to enable the expansion pipe to expand outwards to abut against the inner wall of the pipe, and the outer wall of the pipe is clamped through the two clamping blocks. The utility model provides a tubular product anchor clamps make inside and outside wall of tubular product atress simultaneously reach better centre gripping effect, convenient dismantlement moreover, and the suitability is high.

Description

Pipe clamp

Technical Field

The present application relates to work holders, and more particularly, to a pipe clamp.

Background

The metal pipe plays a role in connection and sealing in an industrial system, and most failure modes of the material in the long-term service process are fatigue failure, so that the fatigue behavior of the pipe is researched, the fatigue strength data is accumulated, and the method has important significance for safety design. The current main method for testing the fatigue performance of the pipe comprises the following steps: and cutting an axial arc-shaped sample from the pipe to perform fatigue performance testing, or flattening the pipe and then cutting a plate-shaped sample to perform fatigue testing. The method cannot reflect the influence of the actual shape and size factors of the pipe on the fatigue performance. Therefore, the method for carrying out the fatigue test on the whole section of the pipe is designed, and the key is how to clamp the pipe to ensure the coaxiality of the test sample and meet the test requirement. In the prior art, most of the pipe plugs or the inner walls are threaded, so that time and labor are wasted, the inner diameters of pipes can be damaged, the pipe plugs and the inner walls of samples can generate cyclic reciprocating friction easily in the test process, the friction parts can become parts which are easy to lose efficacy, and the actual fatigue performance of the pipes can not be accurately obtained.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application will solve lies in, to prior art's above-mentioned tubular product fatigue test centre gripping mode not enough, provides a centre gripping effectual, satisfy the test requirement and conveniently dismantle's tubular product anchor clamps again.

The technical scheme adopted by the application for solving the technical problem is as follows: the utility model provides a pipe clamp, including two anchor clamps subassemblies that the symmetry set up, every anchor clamps subassembly includes the clamp splice seat and sets up two clamp splices on the clamp splice seat side by side, still includes: the plug is fixed between the two clamping blocks on the clamping block seat and is provided with a conical surface which is gradually reduced from a first end close to the clamping block seat to a second end far away from the clamping block seat; the expansion pipe is sleeved on the conical surface of the plug and provided with an outer conical surface and an inner conical surface, the inner conical surface and the conical surface of the plug are arranged in a reverse mode, and the outer conical surface and the inner conical surface are arranged in a reverse mode; and when the pipe to be clamped is sleeved on the outer conical surface of the expansion pipe, the plug is inserted into the expansion pipe to enable the expansion pipe to expand outwards to abut against the inner wall of the pipe, and the outer wall of the pipe is clamped through the two clamping blocks.

In one embodiment of the pipe clamp according to the present application, the expansion tube has a first end and a second end, the first end having an outer diameter greater than the outer diameter of the second end to form an outer tapered surface on the outer circumference of the expansion tube that becomes progressively smaller from the first end to the second end, and the first end having an inner diameter less than the inner diameter of the second end to form an inner tapered surface on the interior of the expansion tube that becomes progressively larger from the first end to the second end; the first end of the expansion pipe is sleeved on the conical surface of the plug, and the pipe is sleeved on the outer conical surface of the second end of the expansion pipe.

In an embodiment of the pipe clamp according to the present application, the sidewall of the expansion pipe is circumferentially provided with a plurality of first open grooves extending from the first end to the second end at intervals, and is provided with a plurality of second open grooves extending from the second end to the first end at intervals relative to the plurality of first open grooves.

In one embodiment of the pipe clamp according to the present application, the plug has a connecting post and a tapered post, the connecting post is fixedly connected to the clamp block seat, the tapered post has a first end close to the clamp block seat and a second end far away from the clamp block seat, and the diameter of the first end of the tapered post is greater than that of the second end, thereby forming the tapered surface.

In one embodiment of the pipe clamp according to the present application, the plug is threadedly coupled to the clamp block seat.

In an embodiment of the pipe clamp according to the present application, the two clamping blocks are two trapezoidal clamping blocks symmetrically arranged on the clamping block seat.

The pipe clamp has the following beneficial effects: according to the pipe clamp disclosed by the embodiment of the application, the inner wall of the pipe is clamped through the matching of three conical surfaces between the expansion pipe and the plug and between the expansion pipe and the pipe, and the outer wall of the pipe is clamped through the two clamping blocks, so that the inner wall and the outer wall of the pipe are simultaneously stressed to achieve a better clamping effect; moreover, the three conical surfaces are reversely arranged, so that the pipe clamping is convenient to disassemble, the expansion pipe is matched with the inner wall of the pipe through the outer conical surface, and the adaptability of the pipe clamp is improved.

Drawings

The present application will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of a pipe clamp according to one embodiment of the present application;

FIG. 2 is a schematic view of the bulkhead of the pipe clamp of FIG. 1;

FIG. 3 is a schematic view of the structure of an expansion pipe in the pipe clamp of FIG. 1;

FIG. 4 is a cross-sectional view of the tubular clamp of FIG. 1 with the plug engaged with the expansion tube to clamp the tubular.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. Also, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

FIG. 1 shows a schematic diagram of a pipe clamp 100 according to one embodiment of the present application. The pipe clamp 100 can be used to perform axial fatigue testing of metal pipes on existing testing equipment available from MTS corporation. As shown in fig. 1, a pipe clamp 100 includes two clamp assemblies 10 and 20 arranged symmetrically for clamping opposite ends of a pipe 30. The clamp assemblies 10 and 20 are identical in structure and further comprise a clamp block seat 11, two clamp blocks 12 and 13, a plug 14 and an expansion pipe 15. The block holder 11 is preferably square so that it can be placed directly into a hydraulic fixture of an MTS apparatus. Two clamping blocks 12 and 13 are arranged side by side on two sides of the clamping block seat 11 and used for relatively moving and clamping the outer wall of the pipe 30. The clamping blocks 12 and 13 are preferably trapezoidal clamping blocks, and are symmetrically arranged on the clamping block seat 11. One end of the plug 14 is fixed on the block holder 11 between the two blocks 12 and 13, for example, screwed to the block holder 11. The other end of the choke plug 14 is sleeved with an expansion pipe 15, and the pipe 30 is sleeved on the outer wall of the expansion pipe 15. The inner wall of the pipe 30 is clamped by the plug 14 and the expansion pipe 15 through the matching of three conical surfaces, and the outer wall of the pipe 30 is clamped by the two clamping blocks 12 and 13, so that the inner wall and the outer wall of the pipe 30 are simultaneously stressed to achieve a better clamping effect.

Referring specifically to fig. 2, the plug 14 has a connecting column 141 and a tapered column 142, the connecting column 141 is used for fixedly connecting with the clamping block seat 11, and the tapered column 142 is used for matching with the expansion tube 15. Wherein the tapered column 142 has a first end 1421 near the chuck block seat 11 and a second end 1422 far from the chuck block seat 11, and the diameter of the first end 1421 of the tapered column 142 is larger than that of the second end 1422, thereby forming a tapered surface 1423 that gradually decreases from the first end 1421 to the second end 1422.

Referring specifically to fig. 3, the expansion tube 15 is hollow and tubular, and has a first end 151 and a second end 152, and the first end 151 has an outer diameter larger than that of the second end 152, so that an outer tapered surface 153 gradually decreasing from the first end 151 to the second end 152 is formed on the outer circumference of the expansion tube 15, and the first end 151 of the expansion tube 15 has an inner diameter smaller than that of the second end 152, so that an inner tapered surface 154 gradually increasing from the first end 151 to the second end 152 is formed inside the expansion tube 15, that is, the outer tapered surface 153 and the inner tapered surface 154 of the expansion tube 15 are not the same tapered surfaces, but opposite tapered surfaces. As further shown in fig. 3, the sidewall of the expansion tube 15 is provided with a plurality of first open grooves 155 extending from the first end 151 to the second end 152 at intervals along the circumferential direction, and a plurality of second open grooves 156 extending from the second end 152 to the first end 151 are provided at intervals relative to the plurality of first open grooves 155, so as to increase the deformation space of the expansion tube 15 in the radial direction.

Referring again to fig. 4, during installation, the first end 151 of the expansion tube 15 is placed over the tapered post 142 of the plug 14 such that the inner tapered surface 154 of the expansion tube 15 abuts the tapered surface 1423 of the tapered post 142, and one end of the tubular member 30 is placed over the second end 152 of the expansion tube 15 such that the outer tapered surface 153 of the expansion tube 15 abuts the inner wall 31 of the tubular member 30. Then, when the tapered column 142 of the plug 14 is inserted into the expansion tube 15 by the clamping block seat 11, the portion of the tapered surface 1423 of the tapered column 142 contacting the inner tapered surface 154 of the expansion tube 15 gradually increases, and an acting force is applied to push the expansion tube 15, so that the expansion tube 15 expands outward, the friction between the outer tapered surface 153 of the expansion tube 15 and the inner wall 31 of the tube 30 increases, and the two clamping blocks 12 and 13 clamp the outer wall of the tube 30, so that the tube 30 is tightly clamped.

According to the pipe clamp 100 of the above embodiment of the present application, the inner conical surface 154 of the expansion pipe 15 and the conical surface 1423 of the plug 14 are designed to be disposed in opposite directions, so that not only the technical effect of outward expansion of the expansion pipe 15 can be achieved, but also when the pipe clamp is taken down after the pipe clamp is completed, the clearance between the inner conical surface 154 and the conical surface 1423 is increased, so that the pipe clamp can be taken down easily only by loosening. And the two conical surfaces arranged in the same direction are very laborious to take down after being tightly abutted, and even can not be taken down. According to the pipe clamp 100 of the above embodiment of the present application, the outer surface of the expansion pipe 15 is specially designed to be the outer conical surface 153 which is arranged opposite to the inner conical surface 154 to sleeve the pipe 30, and the pipe is easier to be taken down after the pipe is clamped compared with the cylindrical surface, and the expansion pipe 15 designed in this way can be suitable for the pipe 30 of a certain inner diameter size range, and a dedicated expansion pipe does not need to be replaced for the pipe of each size, so that the adaptability of the pipe clamp 100 of the present application is improved. In various embodiments of the present application, the angles of inclination of the tapered surface 1423 of the plug 14 and the outer and inner tapered surfaces 153 and 154 of the expansion tube 15 and the thickness of the sidewall of the expansion tube 15 are adjustable, and can be designed according to the requirements of different pipes to be used. For example, if the tube is thin-walled, the thickness of the expansion tube 15 can be designed to be smaller, and the inclination of the outer conical surface 153 of the expansion tube 15 can be designed to be smaller, or vice versa.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (6)

1. The utility model provides a pipe clamp, includes two anchor clamps subassemblies that the symmetry set up, every anchor clamps subassembly includes the clamp splice seat and sets up two clamp splices on the clamp splice seat side by side, its characterized in that still includes:

the plug is fixed between the two clamping blocks on the clamping block seat and is provided with a conical surface which is gradually reduced from a first end close to the clamping block seat to a second end far away from the clamping block seat;

the expansion pipe is sleeved on the conical surface of the plug and provided with an outer conical surface and an inner conical surface, the inner conical surface and the conical surface of the plug are arranged in a reverse mode, and the outer conical surface and the inner conical surface are arranged in a reverse mode;

and when the pipe to be clamped is sleeved on the outer conical surface of the expansion pipe, the plug is inserted into the expansion pipe to enable the expansion pipe to expand outwards to abut against the inner wall of the pipe, and the outer wall of the pipe is clamped through the two clamping blocks.

2. The pipe clamp of claim 1 wherein the expansion tube has a first end and a second end, the first end having an outer diameter greater than the outer diameter of the second end to form an outer tapered surface on the outer circumference of the expansion tube that tapers from the first end to the second end, and the first end having an inner diameter less than the inner diameter of the second end to form an inner tapered surface on the interior of the expansion tube that tapers from the first end to the second end; the first end of the expansion pipe is sleeved on the conical surface of the plug, and the pipe is sleeved on the outer conical surface of the second end of the expansion pipe.

3. The pipe clamp of claim 2, wherein the sidewall of the expansion pipe is circumferentially spaced apart to define a plurality of first open slots extending from the first end to the second end, and is circumferentially spaced apart to define a plurality of second open slots extending from the second end to the first end relative to the plurality of first open slots.

4. The tube clamp of claim 1, wherein the plug has a connecting post fixedly connected to the block holder and a tapered post having a first end proximate to the block holder and a second end distal from the block holder, the first end of the tapered post having a diameter greater than a diameter of the second end to form the tapered surface.

5. The pipe clamp of claim 1, wherein the plug is threadably connected to the clamp block seat.

6. The pipe clamp of claim 1, wherein the two clamp blocks are two trapezoidal clamp blocks symmetrically disposed on the clamp block seat.

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