A clamping device and pipeline residual stress control equipment

Abstract

A clamping device and a residual stress control device for a pipeline are used to fix a variable amplitude rod so that one end of the variable amplitude rod is attached to the pipeline and the other end of the variable amplitude rod is connected to the transmitting end of an ultrasonic transducer, comprising: a fixed bracket, the fixed bracket has a connecting groove and a first connecting hole, the shape of the connecting groove is adapted to the pipeline, and the first connecting hole is connected to the connecting groove; a first fixing member, the first fixing member is arranged on the fixed bracket, and is used to fix the fixed bracket on the pipeline; a second fixing member, the second fixing member is arranged on the fixed bracket, and is used to fix one end of the variable amplitude rod in the first connecting hole. As a result, the ultrasonic wave emitted by the ultrasonic transducer can be transmitted to the pipeline through the variable amplitude rod to reduce the residual stress of the pipeline. Since the residual stress in the pipeline is reduced by ultrasonic waves, the pipeline will not be damaged during the process of processing the pipeline.

Description

Technical Field

[0001] The invention relates to a clamping device and pipeline residual stress regulating equipment. Background Art

[0002] During the pipeline welding process, due to local uneven heating and cooling, an unevenly distributed residual stress field is inevitably generated after welding. The existence of residual stress can lead to defects such as deformation and cracking caused by stress concentration, and will seriously affect the mechanical properties and fatigue life of the pipeline during subsequent use. Ships widely use high-strength steel thin-walled pipelines. The space where the pipeline is located is small, and the pipeline has complex welding forms with various materials and diameters. Due to the particularity of such pipelines in terms of materials and structures, the commonly used traditional residual stress elimination methods, such as heat treatment, mechanical impact, rigid fixation, etc., are no longer applicable. Therefore, there is an urgent need for a clamping device and a pipeline residual stress control device that can be easily installed on the pipeline to reduce and equalize the residual stress of the pipeline, and to control the residual stress on site without damaging the pipeline. Summary of the invention

[0003] In view of the above problems of the prior art, the present application provides a clamping device and a pipeline residual stress control device, which can be easily installed on the pipeline, reduce and equalize the residual stress of the pipeline, and control the residual stress on site without damaging the pipeline.

[0004] A first aspect of the present application provides a clamping device for fixing a variable amplitude rod so that one end of the variable amplitude rod is in contact with a pipe and the other end of the variable amplitude rod is connected to the transmitting end of the ultrasonic transducer, comprising: a fixing bracket, the fixing bracket having a connecting groove and a first connecting hole, the shape of the connecting groove being adapted to the pipe, the first connecting hole being communicated with the connecting groove; a first fixing member, the first fixing member being arranged on the fixing bracket and being used to fix the fixing bracket on the pipe; and a second fixing member, the second fixing member being arranged on the fixing bracket and being used to fix one end of the variable amplitude rod in the first connecting hole.

[0005] From the above, the fixing bracket can be fixed on the pipeline by the first fixing member, so that the pipeline is located in the connecting groove. One end of the horn is fixed in the first connecting hole by the second fixing member, so that one end of the horn can enter the connecting groove through the first connecting hole and abut against the pipeline in the connecting groove. Thus, the ultrasonic wave emitted by the ultrasonic transducer can be transmitted into the pipeline through the horn to reduce the residual stress of the pipeline. Since the residual stress in the pipeline is reduced by ultrasonic wave, the pipeline will not be damaged during the process of processing the pipeline.

[0006] As a possible implementation of the first aspect, the fixing bracket is trapezoidal in shape along the extension direction of the connecting groove, the connecting groove is arranged on the side corresponding to the long bottom side of the trapezoid on the fixing bracket, the first connecting hole is arranged on the side corresponding to the short bottom side of the trapezoid on the fixing bracket, and the first fixing piece is arranged on the side corresponding to the waist side of the trapezoid on the fixing bracket.

[0007] From the above, by arranging the connection groove on the side corresponding to the long bottom of the trapezoid on the fixing bracket, the volume of the fixing bracket can be reduced, so that the fixing bracket can be used in a narrow space. By arranging the first fixing member on the side corresponding to the waist edge of the trapezoid on the fixing bracket, the fixing bracket can be fixed at both sides, thereby improving the stability of the connection between the fixing bracket and the pipeline.

[0008] As a possible implementation manner of the first aspect, a plurality of first fixing members are provided, and the first fixing members are symmetrically arranged on two side surfaces corresponding to the waist of the trapezoid on the fixing bracket.

[0009] As described above, by symmetrically arranging a plurality of first fixing members on two side surfaces corresponding to the trapezoidal waist of the fixing bracket, the stability of the connection between the fixing bracket and the pipeline can be improved.

[0010] As a possible implementation manner of the first aspect, the first fixing member is a magnetic switch.

[0011] As described above, by setting the first fixing member as a magnetic switch, the fixing bracket can be fixed to the pipe by magnetic attraction, which is convenient for users to operate and reduces the difficulty of fixing the fixing bracket in a narrow space.

[0012] As a possible implementation of the first aspect, the second fixing member is fixed on the first connecting hole, and the second fixing member includes: a main body, on which a second connecting hole and a threaded hole are provided, the second connecting hole is connected to the first connecting hole, the second connecting hole is adapted to one end of the amplitude transformer, the threaded hole is arranged along the radial direction of the second connecting hole and is connected to the second connecting hole; a first fastening bolt, the first fastening bolt is threadedly connected to the threaded hole, and extends into the second connecting hole through the threaded hole.

[0013] From the above, the specific structure of the second fixing member is provided, and the first fastening bolt is threadedly connected to the threaded hole and extends into the second connecting hole, so that the amplitude transformer in the second connecting hole can be fixed, so that when the ultrasonic wave is transmitted into the pipeline through the amplitude transformer, the propagation stability can be improved.

[0014] As a possible implementation of the first aspect, the main body is further provided with a third connection hole, a plurality of the third connection holes are provided around the second connection hole, and the third connection hole is parallel to the axis of the second connection hole; the second fixing member further includes: a second fastening bolt. The second fastening bolt passes through the third connection hole and is threadedly connected to the fixing bracket.

[0015] As described above, the main body can be fixed on the fixing bracket by passing the second fastening bolt through the third connecting hole.

[0016] As a possible implementation manner of the first aspect, the second fixing member further includes: a spring, wherein the spring is sleeved on the screw rod of the second fastening bolt and is located between the head of the second fastening bolt and the main body.

[0017] From the above, the elastic force provided by the spring can push the main body and the amplitude transformer toward the pipe in the connecting groove, so that the extrusion force between the amplitude transformer and the pipe is maintained to improve the stability of the connection between the amplitude transformer and the pipe, and improve the stability of ultrasonic waves transmitted from the amplitude transformer to the pipe.

[0018] The second aspect of the present application provides a pipeline residual stress control device, comprising: a clamping device, the clamping device is the clamping device described in any one of the first aspect of the present application; a variable amplitude rod; one end of the variable amplitude rod is fixed in the first connecting hole of the clamping device; an ultrasonic transducer, the other end of the variable amplitude rod is connected to the transmitting end of the ultrasonic transducer.

[0019] From the above, the fixing bracket can be fixed on the pipeline by the first fixing member, so that the pipeline is located in the connecting groove. One end of the horn is fixed in the first connecting hole by the second fixing member, so that one end of the horn can enter the connecting groove through the first connecting hole and abut against the pipeline in the connecting groove. Thus, the ultrasonic wave emitted by the ultrasonic transducer can be transmitted into the pipeline through the horn to reduce the residual stress of the pipeline. Since the residual stress in the pipeline is reduced by ultrasonic wave, the pipeline will not be damaged during the process of processing the pipeline.

[0020] As a possible implementation of the second aspect, the amplitude transformer includes a first part and a second part, the ends of the first part and the second part are connected, the axes of the first part and the second part are perpendicular, and a reflecting surface is provided at the connecting position of the first part and the second part, and the reflecting surface forms an angle of 45° with the axes of the first part and the second part.

[0021] From the above, a turning structure is formed by the connection position of the first part and the second part, so that the pipeline residual stress control device can be turned through the turning structure of the horn when used in a narrow environment, thereby improving the application range of the pipeline residual stress control device. By arranging a reflection surface at the connection position, when the ultrasonic wave propagates in the horn, it can be reflected on the reflection surface, thereby changing the propagation direction, so that the ultrasonic wave can propagate into the pipeline along the bent horn to reduce the residual stress in the pipeline.

[0022] As a possible implementation manner of the second aspect, a coupling agent is applied to one end of the amplitude transformer.

[0023] From the above, by applying coupling agent on one end of the horn, the fitting effect between one end of the horn and the pipeline can be improved, the loss of ultrasonic waves transmitted from the horn into the pipeline can be reduced, and the effect of reducing residual stress in the pipeline can be improved.

[0024] These and other aspects of the invention will become apparent from the following description of the embodiment(s). BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following further illustrates the various features of the present invention and the relationship between the various features with reference to the accompanying drawings. The accompanying drawings are all exemplary, some features are not shown in actual proportion, and some drawings may omit the conventional features in the field involved in the present application and are not necessary for the present application, or additionally show the features that are not necessary for the present application. The combination of the various features shown in the accompanying drawings is not intended to limit the present application. In addition, throughout this specification, the same figure numerals refer to the same content. The specific description of the drawings is as follows:

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the pipeline residual stress control device in the embodiment of the present application;

[0027] Figure 2 A flow chart of the method for using the pipeline residual stress control device of this application.

[0028] Description of Reference Numerals

[0029] 10 Pipeline residual stress regulating and controlling equipment; 100 Clamping device; 110 Fixed bracket; 111 Connecting groove; 112 First connecting hole; 120 First fixing piece; 130 Second fixing piece; 131 Main body; 132 Second connecting hole; 133 Threaded hole; 134 Third connecting hole; 200 Horn; 210 First part; 220 Second part; 230 Reflecting surface; 300 Ultrasonic transducer; 310 Transmitting end. DETAILED DESCRIPTION

[0030] The words "first, second, third, etc." or module A, module B, module C and other similar terms in the specification and claims are only used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that the specific order or sequence can be interchanged where permitted so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0031] In the following description, the numbers representing the steps, such as S110, S120, etc., do not necessarily mean that the steps must be executed in this manner. If permitted, the order of the previous and next steps can be interchanged, or they can be executed simultaneously.

[0032] The term "comprising" as used in the description and claims should not be interpreted as being limited to what is listed thereafter; it does not exclude other elements or steps. Therefore, it should be interpreted as specifying the presence of the features, integers, steps or components mentioned, but does not exclude the presence or addition of one or more other features, integers, steps or components and groups thereof. Therefore, the expression "a device comprising means A and B" should not be limited to a device consisting of components A and B only.

[0033] References to "one embodiment" or "an embodiment" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment" or "in an embodiment" appearing in various places in this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. In addition, in one or more embodiments, the particular features, structures, or characteristics can be combined in any appropriate manner, as would be apparent to one of ordinary skill in the art from this disclosure.

[0034] Below, in conjunction with the accompanying drawings, the specific structure of the pipeline residual stress control device 10 in the embodiment of the present application is described in detail.

[0035] Figure 1 Schematic diagram of the three-dimensional structure of the pipeline residual stress control device 10 in the embodiment of the present application. Figure 1 As shown, the pipeline residual stress control device 10 in the embodiment of the present application includes a clamping device 100, an horn 200 and an ultrasonic transducer 300. Among them, the clamping device 100 can be installed on the pipeline to fix the horn 200 so that one end of the horn 200 is in contact with the pipeline. The ultrasonic transducer 300 is connected to a device such as a controller through wires, and can emit ultrasonic waves in the form of transverse waves or longitudinal waves under the control of the controller. The other end of the horn 200 is fixedly connected to the transmitting end 310 of the ultrasonic transducer 300 by bolts or the like, so that the ultrasonic wave emitted by the ultrasonic transducer 300 can be transmitted into the pipeline through the horn 200 to reduce the residual stress in the pipeline.

[0036] like Figure 1 As shown, the clamping device 100 includes a fixing bracket 110, a first fixing member 120 and a second fixing member 130. The fixing bracket 110 has a connecting groove 111 and a first connecting hole 112. The shape of the connecting groove 111 is adapted to the pipeline, and the first connecting hole 112 is connected to the connecting groove 111. The first fixing member 120 is arranged on the fixing bracket 110, and is used to fix the fixing bracket 110 on the pipeline. The second fixing member 130 is arranged on the fixing bracket 110, and is used to fix one end of the horn 200 in the first connecting hole 112. Thus, the fixing bracket 110 can be fixed to the pipeline by the first fixing member 120, so that the pipeline is located in the connecting groove 111. One end of the horn 200 is fixed in the first connecting hole 112 by the second fixing member 130, so that one end of the horn 200 can enter the connecting groove 111 through the first connecting hole 112 and stick to the pipeline in the connecting groove 111. Thus, the ultrasonic wave emitted by the ultrasonic transducer 300 can be transmitted into the pipeline through the horn 200 to reduce the residual stress of the pipeline. Since the residual stress in the pipeline is reduced by ultrasonic wave, the pipeline will not be damaged during the process of processing the pipeline.

[0037] like Figure 1 As shown, the fixed bracket 110 is trapezoidal in shape when viewed along the extension direction of the connection groove 111, the connection groove 111 is arranged on the side corresponding to the long bottom side of the trapezoid on the fixed bracket 110 (i.e., the longer side of the two parallel sides of the trapezoid), the first connection hole 112 is arranged on the side corresponding to the short bottom side of the trapezoid on the fixed bracket 110 (i.e., the shorter side of the two parallel sides of the trapezoid), and the first fixing member 120 is arranged on the side corresponding to the waist side of the trapezoid on the fixed bracket 110 (i.e., the two sides of the trapezoid connecting the long and short bottom sides of the trapezoid). Thus, by arranging the connection groove 111 on the side corresponding to the long bottom of the trapezoid on the fixed bracket 110, the volume of the fixed bracket 110 can be reduced, so that the fixed bracket 110 is convenient to use in a narrow space. By arranging the first fixing member 120 on the side corresponding to the waist side of the trapezoid on the fixed bracket 110, the fixed bracket 110 can be fixed at both sides, thereby improving the stability of the connection between the fixed bracket 110 and the pipeline.

[0038] like Figure 1 As shown, a plurality of first fixing members 120 are provided, and are symmetrically arranged on two side surfaces corresponding to the waist of the trapezoid on the fixing bracket 110. Thus, by symmetrically arranging a plurality of first fixing members 120 on two side surfaces corresponding to the waist of the trapezoid of the fixing bracket 110, the stability of the connection between the fixing bracket 110 and the pipeline can be improved.

[0039] The first fixing member 120 may be an adhesive member, a binding member, or may be, for example, Figure 1As shown, the first fixing member 120 is a magnetic switch. Therefore, by setting the first fixing member 120 as a magnetic switch, the fixing bracket 110 can be fixed to the pipeline by magnetic attraction. This makes it convenient for users to operate and reduces the difficulty of fixing the fixing bracket 110 in a narrow space. In addition, by connecting the pipeline with the magnetic switch, it is also possible to avoid indentation and deformation of the pipeline and avoid secondary damage to the pipeline.

[0040] like Figure 1 As shown, the second fixing member 130 is fixed on the first connection hole 112, and the second fixing member 130 includes a main body 131 and a first fastening bolt (not shown). The main body 131 is provided with a second connection hole 132 and a threaded hole 133, the second connection hole 132 is communicated with the first connection hole 112, the second connection hole 132 is adapted to one end of the horn 200, and the threaded hole 133 is arranged along the radial direction of the second connection hole 132 and is communicated with the second connection hole 132. The first fastening bolt is threadedly connected with the threaded hole 133, and extends into the second connection hole 132 through the threaded hole 133. Thus, the first fastening bolt is threadedly connected with the threaded hole 133 and extends into the second connection hole 132, so that the horn 200 in the second connection hole 132 can be fixed, so that when the ultrasonic wave is transmitted into the pipeline through the horn 200, the stability of the transmission can be improved.

[0041] like Figure 1 As shown, the main body 131 is further provided with a third connection hole 134, and a plurality of the third connection holes 134 are provided around the second connection hole 132, and the third connection holes 134 are parallel to the axis of the second connection hole 132. The second fixing member 130 further includes a second fastening bolt (not shown), which passes through the third connection hole 134 and is threadedly connected to the fixing bracket 110. Thus, the main body 131 can be fixed to the fixing bracket 110 by passing the second fastening bolt through the third connection hole 134.

[0042] like Figure 1 As shown, the second fixing member 130 further includes a spring (not shown), which is sleeved on the screw of the second fastening bolt and is located between the head of the second fastening bolt and the main body 131. Thus, the main body 131 and the horn 200 can be pushed toward the pipe in the connecting groove 111 by the elastic force provided by the spring, so that the horn 200 and the pipe maintain a moving extrusion force, thereby improving the stability of the connection between the horn 200 and the pipe, and improving the stability of the ultrasonic wave being transmitted from the horn 200 to the pipe.

[0043] like Figure 1As shown, the horn 200 includes a first part 210 and a second part 220, the ends of the first part 210 and the second part 220 are connected, and the axes of the first part 210 and the second part 220 are perpendicular, so that the horn 200 forms an L shape. A reflecting surface 230 is provided at the connection position between the first part 210 and the second part 220, and the reflecting surface 230 is at a 45° angle to the axes of the first part 210 and the second part 220. Thus, a turning structure is formed by the connection position between the first part 210 and the second part 220, so that the pipeline residual stress control device 10 can be turned through the turning structure of the horn 200 when used in a narrow environment, thereby improving the application range of the pipeline residual stress control device 10. By providing the reflecting surface 230 at the connection position, when the ultrasonic wave propagates in the horn 200, it can be reflected at the reflecting surface 230, thereby changing the propagation direction, so that the ultrasonic wave can propagate into the pipeline along the bent horn 200, and the residual stress in the pipeline is reduced.

[0044] Furthermore, one end of the amplitude transformer 200 is configured to be an arc surface that matches the pipe, thereby increasing the fitting area between the amplitude transformer 200 and the pipe, thereby reducing the loss of ultrasonic waves transmitted from the amplitude transformer 200 into the pipe, and improving the effect of reducing residual stress in the pipe.

[0045] Furthermore, coupling agent is applied to both ends of the horn 200. By applying coupling agent to both ends of the horn 200, the fitting effect between the horn 200 and the pipeline and the transmitting end 310 of the ultrasonic transducer 300 can be improved, the loss of ultrasonic waves transmitted from the horn 200 into the pipeline can be reduced, and the effect of reducing residual stress in the pipeline can be improved.

[0046] The present application also provides a method 400 for using the pipeline residual stress control device 10. In the following, the specific steps of the method 400 for using the pipeline residual stress control device 10 in the embodiment of the present application are described in detail in conjunction with the accompanying drawings.

[0047] Figure 2 4 is a flow chart of a method 400 for using the pipeline residual stress control device 10 of the present application. Figure 2 As shown, the specific process of the method 400 for using the pipeline residual stress control device 10 of the present application includes:

[0048] Step S410: Select an adapted device.

[0049] In step S410, a matching fixing bracket 110 is selected according to the curvature of the pipeline. That is, a plurality of fixing brackets 110 may be provided, and the curvatures of the connecting grooves 111 of different fixing brackets 110 are different. According to the curvature of the pipeline, a fixing bracket 110 having a connecting groove 111 with the same curvature may be selected, so that the fixing bracket 110 is installed on the pipeline, and the pipeline is more stable when it is in the connecting groove 111.

[0050] Rotate the appropriate horn 200 according to the position of the pipeline. The horn 200 can be cylindrical or L-shaped. When the space where the pipeline is located is relatively narrow, a suitable horn 200 can be selected according to the space around the pipeline so that the pipeline residual stress control device 10 can be installed on the pipeline.

[0051] Step S420: Detect residual stress.

[0052] In step S420, the residual stress of the pipeline is detected by using a detection device to obtain a first detection result.

[0053] Step S430: determine the location.

[0054] In step S430, the position where residual stress reduction and equalization are required and the magnitude of the residual stress are determined according to the first detection result.

[0055] Step S440: reducing and equalizing residual stress.

[0056] In step S440, the pipeline residual stress control device 10 is fixed to the position on the pipeline where residual stress needs to be reduced and equalized, the ultrasonic transducer 300 is turned on, and high-energy ultrasonic waves are injected into the pipeline to reduce and equalize the residual stress in the pipeline.

[0057] Step S450: detecting residual stress.

[0058] In step S450, after the residual stress of the pipeline is reduced and averaged once, the residual stress in the pipeline is re-detected to obtain a second detection result.

[0059] Step S460: Determine whether the residual stress meets the requirement.

[0060] In step S460, it is determined whether the residual stress in the pipeline meets the requirement according to the second detection result, and if so, the process ends. If not, the process returns to step S440 to reduce and equalize the residual stress in the pipeline again.

[0061] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present application is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may also include more other equivalent embodiments without departing from the concept of the present invention, all of which belong to the protection scope of the present invention.

Claims

1. A clamping device, characterized in that: Used to fix the horn so that one end of the horn is attached to the pipeline, and the other end of the horn is connected to the transmitting end of the ultrasonic transducer, including: A fixing bracket, wherein the fixing bracket has a connecting groove and a first connecting hole, the connecting groove is adapted to the shape of the pipeline, and the first connecting hole is connected to the connecting groove; a first fixing member, the first fixing member being arranged on the fixing bracket and being used for fixing the fixing bracket on the pipe so that the pipe is located in the connecting groove; A second fixing member, the second fixing member is arranged on the fixing bracket, and is used to fix one end of the amplitude changing rod in the first connecting hole; the second fixing member includes a main body, a first fastening bolt and a second fastening bolt; a second connecting hole, a threaded hole and a third connecting hole are arranged on the main body, the second connecting hole is communicated with the first connecting hole, the second connecting hole is adapted to one end of the amplitude changing rod, the threaded hole is arranged along the radial direction of the second connecting hole, and is communicated with the second connecting hole, a plurality of the third connecting holes are arranged around the second connecting hole, and the third connecting hole is parallel to the axis of the second connecting hole; the first fastening bolt is threadedly connected to the threaded hole, and extends into the second connecting hole from the threaded hole; the second fastening bolt passes through the third connecting hole and is threadedly connected to the fixing bracket.

2. The clamping device according to claim 1, characterized in that: The fixing bracket is trapezoidal when viewed along the extension direction of the connecting groove. The connecting groove is arranged on the side corresponding to the long bottom side of the trapezoid on the fixing bracket. The first connecting hole is arranged on the side corresponding to the short bottom side of the trapezoid on the fixing bracket. The first fixing piece is arranged on the side corresponding to the waist side of the trapezoid on the fixing bracket.

3. The clamping device according to claim 2, characterized in that: The first fixing members are provided in plurality and are symmetrically arranged on two side surfaces corresponding to the waist of the trapezoid on the fixing bracket.

4. The clamping device according to claim 3, characterized in that: The first fixing member is a magnetic switch.

5. The clamping device according to claim 1, characterized in that: The second fixing member further comprises: A spring is sleeved on the screw rod of the second fastening bolt and is located between the head of the second fastening bolt and the main body.

6. A pipeline residual stress control device, characterized in that: include: A clamping device, wherein the clamping device is the clamping device according to any one of claims 1 to 5; Amplitude varying rod; one end of the amplitude varying rod is fixed in the first connecting hole of the clamping device; Ultrasonic transducer, the other end of the horn is connected to the transmitting end of the ultrasonic transducer.

7. The pipeline residual stress control device according to claim 6, characterized in that: The amplitude transformer includes a first part and a second part, the ends of the first part and the second part are connected, the axes of the first part and the second part are perpendicular, a reflecting surface is provided at the connecting position of the first part and the second part, and the reflecting surface forms an angle of 45° with the axes of the first part and the second part.

8. The pipeline residual stress control device according to claim 6 or 7, characterized in that: One end of the horn is coated with coupling agent.

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