KR20170031465A - A pipe clamp - Google Patents

Abstract

Disclosed is a pipe clamp for fixing a hydraulic pipe provided in a construction machine. The pipe clamp includes: first and second clamps including a coupling portion and a support portion extending respectively in an arc shape from both ends of the coupling portion; a bracket to which the first and second clamps are fixed; and a coupling member for fixing the first and second clamps to the bracket, wherein each of the support portions has a support groove in contact with the pipe, and the first clamp and the second clamp are disposed to make the support grooves face each other.

Description

Pipe clamp {A PIPE CLAMP}

The present invention relates to a pipe clamp for fixing a hydraulic pipe provided in a construction machine.

Generally, a construction machine such as an excavator is provided with a plurality of pipes through which hydraulic oil flows. If the pipe included in the construction machine is not fixed, it may interfere with the operation part during operation of the construction machine or may come into contact with another member, thereby damaging the pipe. When the pipe moves due to the inertia force generated during operation of the construction machine, To generate noise or to damage pipes or other members. To prevent this problem, the pipe is fixed by a pipe clamp so that it does not move to a specific part of the construction machine.

However, the conventional pipe clamp has a problem that the fixing force for fixing the pipe is weak. Accordingly, there is a problem that the pipe is not kept fixed to the pipe clamp but moves along the extending direction of the pipe.

In addition, the conventional pipe clamp has a problem that it is permanently deformed by the stress generated when the pipe is clamped. There is a case where the clamped pipe clamp is separated from the pipe and clamped again when the maintenance and maintenance of the construction machine is performed. At this time, when the amount of permanent deformation of the pipe clamp is large, there is a problem that the pipe clamp can not provide sufficient fixing force.

KR 20-1998-0011572 U

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pipe clamp capable of providing a sufficient clamping force for firmly fixing a pipe.

It is another object of the present invention to provide a pipe clamp having a smaller permanent deformation amount than a conventional pipe clamp.

According to an aspect of the present invention, there is provided a clamping device comprising: first and second clamps including a coupling portion and a pair of supporting portions extending in an arc shape from both ends of the coupling portion; A bracket to which the first and second clamps are fixed; And a coupling member for fixing the first and second clamps to the bracket, wherein each of the pair of support portions is formed with a support groove for contacting the pipe, the first clamp and the second clamp being fixed to the support groove It is possible to provide a pipe clamp disposed so as to face the pipe clamp.

At this time, the engaging member may be coupled to the bracket through the first and second clamps.

Also, the radius of curvature of the support groove may be less than or equal to the outer radius of the pipe, and may be greater than 0.9 times the outer radius of the pipe.

The boundary between the lower surface of the coupling portion and the support groove may be a curved surface having a curvature radius larger than 0.2 times the outer radius of the pipe and smaller than 0.4 times the outer radius of the pipe.

Further, the thickness of the engaging portion may be thinner than or equal to the outer radius of the pipe.

The thickness of the support portion may be thinner than or equal to 1.6 times the radius of curvature of the boundary portion between the lower surface of the coupling portion and the support groove.

According to the embodiment of the present invention, the fixing force of the pipe clamp is improved by optimizing the thicknesses of the first and second clamps, in particular, the thickness of the support portion, the thickness of the coupling portion, the radius of curvature of the support groove, and the radius of curvature radius of the lower boundary portion The permanent deformation amount is reduced.

1 is an exploded perspective view of a pipe clamp according to an embodiment of the present invention.
FIG. 2 is a view showing a state where a pipe is fixed using a pipe clamp according to an embodiment of the present invention. FIG.
3 is a front view of a first clamp of a pipe clamp according to an embodiment of the present invention.
4 is a front view of a pipe clamp according to a comparative example.
FIG. 5 is a slip test result of a pipe clamp according to an embodiment of the present invention and a pipe clamp according to a comparative example.
6 is a stress diagram generated in a pipe clamp according to a comparative example in primary clamping and secondary clamping.
7 is a stress diagram generated in a pipe clamp according to an embodiment of the present invention in primary clamping and secondary clamping.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is an exploded perspective view of a pipe clamp according to an embodiment of the present invention, FIG. 2 is a view showing a state where a pipe is fixed using a pipe clamp according to an embodiment of the present invention, FIG. Fig. 4 is a front view of a first clamp of a pipe clamp according to one embodiment of the present invention.

The pipe clamp 100 according to an embodiment of the present invention is for fixing a pair of pipes 200 to a specific part of a construction machine. Referring to FIG. 2, a pipe clamp 100 according to an embodiment of the present invention can fix two pipes 200. At this time, the pipes 200 may be disposed in parallel with each other at intervals.

1 to 3, a pipe clamp 100 according to an embodiment of the present invention may include a first clamp 110, a second clamp 120, a bracket 130, and a coupling member 140 have. The first clamp 110 and the second clamp 120 are in direct contact with the pipe 200 to fix the pipe 200 and the coupling member 140 is configured to connect the first and second clamps 110 and 120 to the bracket 130 ).

The bracket 130 serves as an intermediary for fixing the first and second clamps 110 and 120 to a specific part of the construction machine. The bracket 130 may be a member separately provided at a specific portion of the construction machine. Or the bracket 130 may be a member that is formed integrally with a specific part of the construction machine or a specific part of the construction machine itself. The bracket 130 may be formed with a coupling hole 132 to which the coupling member 140 is coupled.

The first and second clamps 110 and 120 may include coupling portions 111 and 211 and supporting portions 114 and 214, respectively. The first and second clamps 110 and 120 may be disposed opposite to each other with a pair of pipes 200 interposed therebetween. The engaging portions 111 and 211 may be in the form of a flat plate having a constant thickness d2. At least one coupling hole 113 and 213 may be formed at the center of the coupling portions 111 and 211 to allow the coupling member 140 to pass therethrough. The length of the coupling portions 111 and 211 may be determined in consideration of the diameter of the pipe 200. The coupling holes 113 and 213 may be provided in an appropriate number depending on the length of the coupling portions 111 and 211 .

The supporting portions 114 and 214 may extend in an arc shape from both ends in the width direction of the engaging portions 111 and 211. The support portions 114 and 214 may be integrally formed with the coupling portions 111 and 211. The thickness d1 of the supporting portions 114 and 214 may be thinner than the thickness d2 of the engaging portions 111 and 211. [ The support portions 114 and 214 may have support grooves 115 and 215 for supporting the pipe 200. The vertical cross section of the support grooves 115 and 215 may be an arc shape. When the first and second clamps 110 and 120 are coupled by the coupling member 140, the support groove 115 of the first clamp 110 and the support groove 215 of the second clamp 120 are opened Thereby forming a cylindrical body. The pair of support grooves 115 and 215 provided at the opposite ends of the coupling portions 111 and 211 can respectively support a part of the periphery of the pair of pipes 200 to support the pipe 200 in a non- . The support part 114 of the first clamp 110 and the support part 114 of the first clamp 110 and the second clamp 120 are fixed so that the pipe 200 fixed by the first and second clamps 110 and 120 is not separated from the first and second clamps 110 and 120, Is preferably smaller than the diameter of the pipe (200).

The engaging member 140 may engage the first and second clamps 110 and 120 with the bracket 130. According to the present embodiment, the coupling member 140 may be a bolt. The coupling member 140 may be coupled to the coupling hole 132 of the bracket 130 through the coupling holes 113 and 213 formed in the first and second clamps 110 and 120, respectively. Accordingly, the first and second clamps 110 and 120 can be fixed to the bracket 130. When the first and second clamps 110 and 120 are fixed to the bracket 130 by the coupling member 140, the first and second clamps 110 and 120 are separated from the bracket 130 by the coupling force of the coupling member 140. [ So that the pipe 200 can be held fixed to the supports 114 and 214 of the first and second clamps 110 and 120.

Hereinafter, a method of fixing the pipe using the pipe clamp according to the present embodiment will be described with reference to the above-described components.

In order to fix the pipe 200 by using the pipe clamp 100 according to an embodiment of the present invention, the second clamp 120 is mounted on the upper surface of the bracket 130 so that the support groove 215 faces upward. . Thereafter, the pipe 200 is seated in each of the pair of support grooves 215 of the second clamp 120. Next, the first clamp 110 is placed on the second clamp 120 so that the support groove 115 faces the support groove 215 of the second clamp 120, and the engagement member 140 is used Thereby fixing the first and second clamps 110 and 120 to the bracket 130. The lower surface 112 of the first clamp 110 and the lower surface 212 of the second clamp 120 are connected to each other by the shapes of the first and second clamps 110 and 120 and the degree of engagement of the coupling member 140, It may or may not touch. When the first and second clamps 110 and 120 are fixed by the coupling member 140, the support portions 114 and 214 of the first and second clamps 110 and 120 are closely contacted with the pipe 200, Can be firmly fixed. When the pipe 200 is fixed to the pipe clamp 100 according to the embodiment of the present invention, the support portions 114 and 214 press the outer circumferential surface of the pipe 200, so that even if an external force acts on the pipe 200, 200 can be kept stationary without moving. The use of the pipe clamp 100 according to an embodiment of the present invention is not limited to the above-described fixed order, and it is obvious that the fixing order may be changed according to necessity.

In order to improve the clamping force of the pipe clamp 100 according to an embodiment of the present invention, the support portions 114 and 214 of the first and second clamps 110 and 120 may contact the pipe normal force Contact Normal Force. In addition, since the clamping force can be reduced when permanent deformation occurs in the first and second clamps 110 and 120, it is necessary to minimize the permanent deformation of the first and second clamps 110 and 120. The pipe clamp 100 according to an embodiment of the present invention can provide optimized dimensional information for each part of the first and second clamps 110 and 120 to satisfy this need.

The pipe clamp 100 according to an embodiment of the present invention has a symmetrical structure with the first clamp 110 and the second clamp 120 sandwiched between the pipes 200 so that the first clamp 110 ).

The factors affecting the contact vertical drag and the permanent deformation amount in the first clamp 110 are the thickness d1 of the support portion 114, the thickness d2 of the engagement portion 111, the radius of curvature of the support groove 115 And a curvature radius R2 of a boundary portion 118 (hereinafter referred to as a lower boundary portion) between the lower surface 112 of the coupling portion 111 and the support groove 115, and the like.

Since the supporting part 114 directly contacts the pipe 200 and applies a fixing force to the pipe 200 and an external force acting on the pipe 200 is directly transmitted through the pipe 200, The thickness d1 of the support portion 114 is directly related to the amount of permanent deformation of the support portion 114. [ If the thickness d1 of the support portion 114 is thinner than an appropriate thickness, the support portion 114 preferably has a proper thickness since the permanent deformation of the support portion 114 may be large.

Since the engaging portion 111 is a portion where the force applied from the pipe 200 is transmitted through the supporting portion 114 while the engaging portion 111 is fixed by the engaging member 140, the thickness d2 of the engaging portion 111 is Which is directly related to the contact normal force and the amount of permanent deformation of the support 114. If the thickness d2 of the engaging portion 111 is thick and the lower surface 112 of the engaging portion 111 is located 2 mm or more below the center of the pipe 200, a contact vertical drag may not be generated. It is preferable that the lower surface 112 of the engaging portion 111 is positioned higher than 2 mm below the center of the pipe 200 because the pipe 200 may not be firmly fixed to the pipe clamp.

Since the support groove 115 is in contact with the pipe 200 and presses the outer circumferential surface of the pipe 200, when the radius of curvature R1 of the support groove 115 is larger than a proper size, And may not be closely adhered to the outer circumferential surface of the base member 200. In this case, it is preferable that the radius of curvature R1 of the support groove 115 is smaller than the outer radius of the pipe 200, because the pipe 200 may not be firmly fixed to the pipe clamp. However, even if the radius of curvature R1 of the support groove 115 is excessively smaller than the outer radius of the pipe 200, the outer circumferential surface of the pipe 200 and the support groove 115 may not be uniformly contacted. For example, the radius of curvature R1 of the support groove 115 is preferably about 0.5 mm smaller than the outer radius of the pipe 200.

The lower boundary 118 may be curved. Since the radius of curvature R2 of the lower boundary 118 is smaller than the radius of curvature R2 of the coupling portion 111 because the coupling portion 111 contacts the pipe 200, Is determined so as not to be in contact with the pipe 200.

The thickness d1 of the support portion 114, the thickness d2 of the coupling portion 111, the radius of curvature R1 of the support groove 115 and the radius of curvature R2 of the lower boundary portion 118 And the values of the contact normal drag and the permanent deformation amount when the test for fixing the pipe having the outer radius of 17 mm is performed using the first and second clamps 110 and 120 having various values. The test was performed by pushing the first and second clamps 110 and 120 with an infinite force until the first and second clamps 110 and 120 contact each other and stop moving.

factor
Exam conditions d1 (mm) d2 (mm) R1 (mm) R2 (mm) Contact vertical drag (N) Permanent deformation (mm) #One 9 17 16.5 5 2474.1 1.9 #2 8 16 15.5 4 3535.3 11.1 # 3 8 17 16.5 5 2518.6 1.8 #4 9 16 16.5 6 2695.6 1.9 # 5 9 18 15.5 5 4022.6 8.4 # 6 10 17 15.5 6 3623.9 8.5 # 7 10 18 16.5 4 2478.3 1.8 #8 9 18 16.5 5 2491 1.76 # 9 9 16.5 17 5 2637 3.55 # 10 9 17 17 5 2489 2.27 # 11 9 16 17.5 4 1323 - # 12 9 17 17.5 5 1428 -

In order to provide a sufficient clamping force for firmly fixing the pipe, it is preferable that the contact vertical force is 2000N or more and the permanent deformation amount of the both ends 116 of the first and second clamps 110 and 120 is 2 mm or less. Test examples satisfying this are # 1, # 3, # 4, # 7 and # 8. However, in the test examples other than # 11 and # 12, the permanent deformation amount is larger than the reference value of 2 mm, but the contact vertical force is more than 2000 N, so that a good fixing force can be provided. In particular, the test examples of # 9 and # 10 can provide a fixation force close to the most preferred embodiment because the excess amount of the permanent deformation amount is not large. On the other hand, when the radius of curvature R1 of the support groove 115 is larger than the outer radius of the pipe 200, it can be confirmed that the contact vertical drag is remarkably low and the sufficient fixing force can not be provided.

It can be seen from the above table that the radius of curvature R1 of the support groove 115 is less than or equal to the outer radius of the pipe 200 and preferably greater than 0.9 times the outer radius of the pipe 200. [ It can also be seen that the radius of curvature R2 of the lower boundary 118 is preferably greater than 0.2 times the outer radius of the pipe 200 and less than 0.4 times. It is also understood that the thickness d2 of the coupling portion 111 is preferably thinner than or equal to the outer radius of the pipe 200. [ It is also appreciated that the thickness d1 of the support 114 is preferably less than or equal to 1.6 times the radius of curvature R2 of the lower boundary 118. [ It is preferable that the thickness d1 of the supporting portion 114 is thinner than or equal to the thickness d2 of the engaging portion 111. [

Meanwhile, the pipe clamp 100 according to an embodiment of the present invention and the pipe 100 according to an embodiment of the present invention, The excellence of the pipe clamp 100 according to an embodiment of the present invention can also be confirmed through a test for clamping.

4 is a front view of a pipe clamp according to a comparative example. As a test method different from the test for obtaining the results of Table 1, the pipe clamp 100 according to the embodiment of the present invention and the pipe clamp 300 according to the comparative example ) To the bracket 130, respectively. The pipe clamp 100 according to an embodiment of the present invention has a structure in which the thickness d1 of the supporting portions 114 and 214 of the first and second clamps 110 and 120 is 9 mm and the thickness d1 of the coupling portions 111 and 211 the radius of curvature R1 of the support grooves 115 and 215 is 16.5 mm and the radius of curvature R2 of the lower boundary 118 is 5 mm and the pipe clamp 300 according to the comparative example has a radius of curvature d2 of 18 mm, The overall thickness was constant at 9 mm. The following test results were obtained for the respective pipe clamps (100, 300).

When the pipe is clamped using the pipe clamp 300 according to the comparative example, the contact vertical force generated in the portion 304 corresponding to the supports 114 and 214 of the pipe clamp 100 according to the embodiment of the present invention And the amount of permanent deformation of both end portions 306 in the width direction was 0.81 mm.

In comparison with this, in the pipe clamp 100 according to the embodiment of the present invention, the contact vertical force generated by the support portion 114 of the first clamp 110 is 2492N, which is increased by 305% as compared with the comparative example, The amount of permanent deformation of both end portions 116 in the width direction of the substrate 110 was 0.25 mm, which was lowered to 31% as compared with the comparative example.

Further, when the pipes are fixed by using the pipe clamp 300 according to the comparative example and the pipe clamp 100 according to an embodiment of the present invention, when the pipe is forcibly pushed, the load of the clamped pipe is checked , Whereas in the case of the pipe clamp 300 according to the comparative example, the pipe is pushed by an average load of 1.60 kN, whereas in the case of the pipe clamp 100 according to an embodiment of the present invention, It was confirmed that the fixing force was improved by 293% as compared with the comparative example.

A boundary portion 117 (hereinafter referred to as an upper boundary portion) between the upper surface of the coupling portion 111 and the upper surface of the support portion 114 when the pipe 200 is clamped using the pipe clamp 100 according to an embodiment of the present invention Stress concentration occurs. Therefore, it is possible to determine whether the first and second clamps 110 and 120 are permanently deformed by measuring the stress generated at this portion during clamping.

Fig. 6 is a stress diagram generated in a pipe clamp according to a comparative example in primary clamping and secondary clamping, and Fig. 7 is a stress diagram generated in a pipe clamp according to an embodiment of the present invention during primary clamping and secondary clamping. to be. The stress diagrams shown in Figs. 6 and 7 are values measured from a strain gauge attached to the upper boundary 117.

As shown in FIG. 6, in the pipe clamp 300 according to the comparative example, when the clamping is released by unlocking the coupling member 140 after the primary clamping and then the secondary clamping is performed, the secondary clamping It can be confirmed that the stress value of the upper boundary portion 117 becomes smaller. Accordingly, it can be seen that the clamping force of the pipe clamp 300 according to the comparative example is lowered when the clamped pipe is clamped and then clamped for maintenance and repair. 7, the pipe clamp 100 according to an exemplary embodiment of the present invention is configured such that when the secondary clamping is performed after the primary clamping, the stress value at the corresponding portion during the primary clamping and the secondary clamping It can be confirmed that there is almost no difference between the two. Accordingly, it can be seen that the clamping force of the pipe clamp 100 according to the embodiment of the present invention does not deteriorate even if the clamping and the unclamping are repeated.

As described above, it can be seen that the pipe clamp 100 according to an embodiment of the present invention has an excellent clamping performance as compared with the pipe clamp 300 according to the comparative example.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. . Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: pipe clamp 110: first clamp
111: engaging portion 114:
115: support groove 120: second clamp
211: engaging portion 214:
215: support groove 130: bracket
140:

Claims (6)

First and second clamps including a coupling portion and a pair of supporting portions extending in an arc shape from both ends of the coupling portion;
A bracket to which the first and second clamps are fixed; And
And a coupling member for fixing the first and second clamps to the bracket,
Wherein the first clamp and the second clamp are disposed so that the support grooves are opposed to each other, and the thickness of the support portion is thinner or thinner than the thickness of the engaging portion, clamp. The method according to claim 1,
And the engaging member is coupled to the bracket through the first and second clamps. The method according to claim 1,
Wherein the radius of curvature of the support groove is less than or equal to the outer radius of the pipe and greater than 0.9 times the outer radius of the pipe. The method of claim 3,
Wherein a boundary portion between the lower surface of the coupling portion and the support groove is formed of a curved surface having a radius of curvature larger than 0.2 times the outer radius of the pipe and smaller than 0.4 times the outer radius of the pipe. 5. The method of claim 4,
And the thickness of the engaging portion is thinner than or equal to the outer radius of the pipe. 6. The method of claim 5,
Wherein the thickness of the support portion is thinner than or equal to 1.6 times the radius of curvature of the boundary portion between the lower surface of the coupling portion and the support groove.

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