Device and method for adjusting feeding angle of driven steel belt in double-wall spiral welded pipe
By using a feeding angle adjustment device to adjust the preset angle of the driven steel strip during the production of double-wall spiral welded pipes, the welding quality problem caused by inconsistent feeding angles of the steel strip was solved, and automated production and efficient welding were achieved.
Patent Information
- Application Number
- CN202510936459.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-08
- Publication Date
- 2025-11-07
AI Technical Summary
In the production process of double-wall spiral welded pipes, inconsistent feeding angles and dimensional mismatches of the steel strips lead to unstable spiral butt joint widths, affecting welding quality and production efficiency.
The feed angle adjustment device uses a clamping mechanism and an adjustment mechanism to adjust the driven steel strip at a preset angle. Combined with heating and sensing elements, it ensures that the gap of the spiral butt joint is within the allowable range, thus achieving automated production.
Ensure the alignment and welding quality of the spiral joints, avoid alternation, overlap, and joint widening, and enable production line adjustments without stopping the machine, thereby improving welding efficiency and quality.
Smart Images
Figure CN120901112A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of steel pipe processing, in particular to a driven steel strip feeding angle adjusting device and method in double-wall spiral welded pipe. BACKGROUND
[0002] The steel pipe filled with concrete is a special steel pipe structure, that is, the concrete is poured into the steel pipe and tamped to increase the strength and stiffness of the steel pipe structure, which has unique mechanical properties and application advantages, and is a typical structure in the steel and concrete composite structure. The compressive strength of concrete is high, but the bending resistance is very weak, while the bending resistance of steel, especially shaped steel, is strong, and has good elastic-plasticity, but is easy to lose stability and axial compressive capacity under compression. The steel pipe filled with concrete can combine the advantages of both in structure, so that the compressive strength of concrete can be doubled, and at the same time, the presence of concrete limits the buckling of the steel pipe structure in one direction, improving the stiffness of the steel pipe, and both are mutually enhanced, thereby greatly improving various mechanical properties. The steel and concrete composite structure has been applied in practical engineering projects and has shown good performance.
[0003] The applicant previously invented a combined structure spiral welded steel pipe for water supply, which is composed of two layers of spiral welded steel pipe walls and spiral webs (spiral reinforcing rings) in the interlayer of the two layers of pipe walls. The two layers of pipe walls are respectively formed by spiral coiling of the main steel strip and the driven steel strip, wherein the outer wall can be a flat wall or a corrugated wall, and when the outer wall is a corrugated wall, the corrugated steel strip is the main steel strip. The spiral web is vertically welded with the inner layer and the outer layer of the two layers of steel pipes to form a spiral web. It is found through tests that the following problems occur during the coiling of the web: after the main steel strip with the web is coiled, a pipe blank is formed, and during the formation of the pipe blank, due to the influence of various factors, the diameter of the pipe blank sometimes changes slightly. After the gradual accumulation of this change, the size matching of the driven steel strip and the pipe blank will have problems, mainly concentrated in the width of the spiral butt weld of the driven steel strip after spiral coiling, which will increase beyond the range, or disappear, or produce bite and edge overlap. At the same time, during the manufacturing process of the above product, the angle between the steel strip constituting the outer pipe and the axis of the pipe body (i.e. the second feeding angle) and the angle between the steel strip constituting the inner pipe and the axis of the pipe body (i.e. the first feeding angle) are different, and the linear velocities of the two steel strips are also different. During the process of coiling the steel strip into a spiral steel pipe, the width of the spiral butt joint is affected by various factors, and may change, overlap, gradually widen, and even be unable to be welded. SUMMARY
[0004] Therefore, it is necessary to provide a driven steel strip feeding angle adjusting device and method in double-wall spiral welded pipe to solve the above problems and ensure production quality and efficiency.
[0005] The application discloses a feeding angle adjusting device for a driven steel belt in a double-wall spiral welded pipe, the double-wall spiral welded pipe comprising a main steel belt and a driven steel belt, the main steel belt being spirally formed into a pipe blank, the driven steel belt being spirally formed and connected and welded with the pipe blank in the process of the spiral forming, the feeding angle adjusting device being arranged upstream of a forming mechanism, the feeding angle adjusting device comprising:
[0006] a clamping mechanism, at least two sets of the clamping mechanism being arranged for clamping or releasing the driven steel belt, the two sets of the clamping mechanism being arranged in front of and behind each other in the length direction of the driven steel belt, each set of the clamping mechanism comprising a first end and a second end, the first end and the second end being respectively arranged at two side edges of the driven steel belt in the length direction, and
[0007] an adjusting mechanism, the adjusting mechanism comprising a first adjusting member and a second adjusting member, the first adjusting member being connected between the first ends of the two adjacent sets of the clamping mechanism, the second adjusting member being connected between the second ends of the two adjacent sets of the clamping mechanism, the first adjusting member being used for adjusting the relative distance between the first ends of the two adjacent sets of the clamping mechanism, and the second adjusting member being used for adjusting the relative distance between the second ends of the two adjacent sets of the clamping mechanism, so that at least one side edge of the driven steel belt is elongated, and a preset angle bending, i.e., a sickle bend, is generated in the length direction of the driven steel belt.
[0008] In one of the embodiments, the first adjusting member and the second adjusting member are both telescopic structures.
[0009] In one of the embodiments, the clamping mechanism comprises an upper clamping rod and a lower clamping rod, the upper clamping rod and the lower clamping rod being respectively arranged at two opposite sides in the thickness direction of the driven steel belt, and the upper clamping rod and the lower clamping rod being capable of approaching each other to clamp the driven steel belt.
[0010] In one of the embodiments, the adjusting mechanism comprises a third adjusting member and a fourth adjusting member, the third adjusting member being connected to one end of the upper clamping rod and the lower clamping rod, and the fourth adjusting member being connected to the other end of the upper clamping rod and the lower clamping rod.
[0011] In one of the embodiments, the feeding angle adjusting device further comprises a heating member, the heating member being arranged between the two adjacent sets of the clamping mechanism and surrounding the driven steel belt, and the heating member being used for heating the driven steel belt to 800-1500 DEG C.
[0012] In one of the embodiments, the feeding angle adjusting device further comprises a protective cover, the protective cover being arranged outside the heating member and the driven steel belt, and the protective cover being provided with an inert gas when the heating member is working.
[0013] In one embodiment, a cooling device is arranged downstream of the feed angle adjusting device.
[0014] In one embodiment, the feed angle adjusting device is movably arranged on a guide rail, and follows the driven steel strip and returns to the original position after the work is completed.
[0015] In one embodiment, the feed angle adjusting device further comprises a sensing element and a controller. The sensing element is used to detect the seam pitch of the spiral butt joint after the driven steel strip is coiled, and the value of the seam pitch is fed back to the controller when the seam pitch exceeds the preset value. The controller controls the clamping mechanism to clamp the driven steel strip and controls the adjusting mechanism to work.
[0016] In one embodiment, the driven steel strip is unwound by an unwinding mechanism, and an arc-shaped track is arranged below the unwinding mechanism to enable the unwinding mechanism to move on the arc-shaped track. During the adjustment of the driven steel strip entering the feed angle adjusting device, the unwinding mechanism moves left and right in coordination with the change of the feed angle adjusting device.
[0017] A method for adjusting the feed angle of a driven steel strip in a double-walled spiral welded pipe, comprising the steps of:
[0018] determining a preset adjustment region on the driven steel strip to be coiled;
[0019] clamping the two sides of the driven steel strip in the thickness direction around the preset adjustment region;
[0020] After clamping, heating the preset adjustment region, stretching one side of the driven steel strip in the preset adjustment region to the required length, so that the driven steel strip produces a preset angle bend, i.e. a sickle bend, when coiled in the length direction. When the steel strip with angle bend is spirally coiled, the seam pitch of the spiral butt joint is adjusted to the allowable range, thereby realizing normal welding.
[0021] In one embodiment, the step of determining the preset adjustment region further comprises the steps of:
[0022] detecting the seam pitch of the spiral butt joint after the driven steel strip is coiled;
[0023] when the seam pitch exceeds the preset value, determining the downstream region exceeding the preset value as the preset adjustment region;
[0024] The step of clamping the driven steel strip further comprises controlling the clamping mechanism to perform clamping action.
[0025] The feeding angle adjusting device and method can adjust the driven steel belt constituting the inner tube or the outer tube before the driven steel belt is coiled, and can realize the alignment of the spiral butt joint after the driven steel belt is coiled, avoid the alternation, the lap variation, and the gradually widened joint, ensure the smooth welding of the spiral butt joint, ensure the welding quality, and facilitate the automatic welding pipe processing and the instant adjustment of the feeding angle of the driven steel belt in the non-stop state of the production line. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is a top view structural schematic diagram of the feeding angle adjusting device of an embodiment of the present application.
[0027] Figure 2 It is a vertical sectional view structural schematic diagram of the feeding angle adjusting device of an embodiment of the present application.
[0028] Figure 3 It is a horizontal sectional view structural schematic diagram of the feeding angle adjusting device of an embodiment of the present application. DETAILED DESCRIPTION
[0029] In order to make the above objectives, characteristics and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application are described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0030] In the description of the present application, it should be understood that if these terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0031] In addition, if these terms “first”, “second” appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In the description of the present application, if the term “multiple” appears, the meaning of “multiple” is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0032] In the present application, unless specifically stated and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", "fixing" and the like are used broadly and encompass both direct and indirect connections, mechanical and electrical connections, connections through intermediate media, and the like.
[0033] In the present application, unless specifically stated and limited otherwise, the terms "on", "under", "above", and "below" as used in the present application are used in their context-adapted and philosophically relative sense, and are not used in a strict, geometric or planar sense. As such, the terms "on", "under", "above", and "below" can encompass both direct and indirect contacts of the first and second features, and can encompass a first feature being directly on or under a second feature, or a first feature being indirectly on or under a second feature through an intermediate medium. Moreover, a first feature being "above" or "on top of" a second feature can mean the first feature being directly above or obliquely above the second feature, or can simply mean the first feature being horizontally higher than the second feature. A first feature being "below" or "under" a second feature can mean the first feature being directly below or obliquely below the second feature, or can simply mean the first feature being horizontally lower than the second feature.
[0034] It is to be understood that where an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, where an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0035] The applicant previously invented a combined structure spiral welded steel pipe for water supply, which is composed of two layers of spiral welded steel pipe walls and two layers of spiral webs (spiral reinforcing rings) in the pipe wall interlayers. The spiral web is vertically welded with the inner layer and outer layer of the two layers of steel pipes to form. Through experiments, it is found that the following problems occur when the web is rolled: ① After the web is rolled, due to the stretching of the outer edge of the web and the compression of the inner edge, the height of the web decreases significantly. Even if it is the same batch of steel, the same original height, the amplitude of the decrease is different, which will seriously affect the connection and matching size of the subsequent outer pipe steel strip and composite steel strip. ② The equipment power for rolling is very large, and the inner edge of the web has a large shrinkage force, which causes the inner pipe steel strip connected by welding to deform at the connection. At the same time, the angle between the steel strip constituting the outer pipe and the axis of the pipe body (i.e. the second feeding angle) is different from the angle between the steel strip constituting the inner pipe and the axis of the pipe body (i.e. the first feeding angle) during the manufacturing process of the above product. The linear velocity of the two steel strips is also different. During the process of rolling the steel strip into a spiral steel pipe, the width of the spiral butt joint is affected by various factors, and the following situations may occur: alternation, deviation, gradually widening of the joint, and inability to weld. The factors affecting the width of the spiral butt joint include but are not limited to: the first factor is the quality problem of the steel strip constituting the inner pipe or the outer pipe during rolling, such as irregular diameter after rolling; the second factor is the error of the feeding angle of the steel strip constituting the inner pipe or the outer pipe; the third factor is the straightness of the steel strip constituting the inner pipe or the outer pipe itself; the fourth factor is the uneven thickness of the steel strip constituting the inner pipe or the outer pipe, i.e. the thickness error is too large.
[0036] Referring to Figure 1 , Figure 1The structure diagram of the feeding angle adjusting device in the embodiment of the application is shown. The feeding angle adjusting device 100 for steel strips in a double-walled spiral welded pipe is provided in the embodiment of the application. The double-walled spiral welded pipe includes an inner pipe and an outer pipe, and at least one of the inner pipe and the outer pipe is made of flat steel strips spirally formed by a roll forming mechanism. The double-walled spiral welded pipe includes a main steel strip and a driven steel strip. The main steel strip is spirally formed into a pipe blank, which is a preliminary structure of the inner pipe. The driven steel strip is spirally formed and connected and welded with the pipe blank in the process of the spiral forming. The driven steel strip is finally made into the outer pipe. The feeding angle adjusting device 100 is arranged upstream of the roll forming mechanism. Specifically, the feeding angle adjusting device 100 adjusts the feeding angle of the driven steel strip 10 when entering the roll forming mechanism. At least one of the inner pipe and the outer pipe in the double-walled spiral welded pipe is made of flat steel strips. The steel strip constituting the outer pipe can be a flat steel strip or a corrugated steel strip. When the steel strip constituting the outer pipe is a flat steel strip, the feeding angle adjusting device 100 needs to be arranged before the roll forming. The steel strip constituting the inner pipe is generally a flat steel strip. The feeding angle adjusting device 100 generally needs to be arranged before the roll forming. When the steel strips (main steel strip and driven steel strip 10) constituting the inner pipe and the outer pipe are simultaneously formed, the feeding angle adjusting device 100 needs to be arranged for synchronous adjustment in some cases.
[0037] The feeding angle adjusting device 100 includes a clamping mechanism 110 and an adjusting mechanism 120. The clamping mechanism 110 is arranged at least in two groups. The clamping mechanism 110 is used to clamp or release the driven steel strip 10. The two groups of clamping mechanisms 110 are arranged at intervals in the length direction of the driven steel strip 10. Each group of clamping mechanisms 110 includes a first end and a second end. The first end and the second end are respectively located at two side edges in the length direction of the driven steel strip 10. The adjusting mechanism 120 includes a first adjusting part 121 and a second adjusting part 122. The first adjusting part 121 is connected between adjacent first ends. The second adjusting part 122 is connected between adjacent second ends. The first adjusting part 121 is used to adjust the relative distance of the first ends of adjacent clamping mechanisms 110. The second adjusting part 122 is used to adjust the relative distance of the second ends of adjacent clamping mechanisms 110. At least one side edge of the driven steel strip 10 is elongated. When the driven steel strip 10 is spirally formed in the length direction, a preset angle bend, i.e., a sickle bend, is generated. When the driven steel strip 10 after the angle bend is spirally formed, the pitch of the spiral butt weld is adjusted to a permissible range, so that normal welding is realized.
[0038] The feeding angle adjusting device 100 and the method can adjust the driven steel belt 10 before coiling, change the feeding angle, align the spiral butt joints after coiling, avoid alternating, overlapping and gradually widening joints, ensure smooth welding of the spiral butt joints, ensure the welding quality, facilitate automatic welding pipe processing, and realize instant adjustment of the feeding angle of the driven steel belt 10 in a non-stop state of the production line.
[0039] Specifically, the clamping mechanism 110 is provided with at least two clamping mechanisms 110, and the two adjacent clamping mechanisms 110 clamp the driven steel belt 10, and the two adjacent clamping mechanisms 110 define a preset adjustment area that needs to be adjusted.
[0040] Along the longitudinal direction of the driven steel belt 10, the driven steel belt 10 includes a first side and a second side (the upper and lower sides shown in the figure), and the first adjusting member 121 and the second adjusting member 122 correspond to the first side and the second side, respectively, and the first end and the second end correspond to the first side and the second side, respectively. Figure 1
[0041] In one embodiment, the first adjusting member 121 and the second adjusting member 122 are telescopic structures. Specifically, the telescopic structure is a mechanical telescopic rod or a hydraulic telescopic cylinder, which can be automatically telescoped by control. When the first adjusting member 121 and the second adjusting member 122 are adjusted, the driven steel belt 10 is clamped by the clamping mechanism 110, and with the telescopic structure being actively operated, the first adjusting member 121 and the second adjusting member 122 are elongated, the clamping mechanism 110 is moved, and the corresponding side is stretched.
[0042] In one embodiment, the clamping mechanism 110 includes an upper clamping rod 111 and a lower clamping rod 112, and the upper clamping rod 111 and the lower clamping rod 112 are arranged on opposite sides in the thickness direction of the driven steel belt 10. The upper clamping rod 111 and the lower clamping rod 112 can move towards each other to clamp the driven steel belt 10. The upper clamping rod 111 and the lower clamping rod 112 can be actively moved, and when moving towards each other, the driven steel belt 10 is clamped, and when moving away from each other, the driven steel belt 10 and the clamping mechanism 110 are separated. Specifically, the upper clamping rod 111 and the lower clamping rod 112 are arranged in parallel, and the upper clamping rod 111 and the lower clamping rod 112 are both columnar structures.
[0043] In one of the embodiments, the adjusting mechanism 120 comprises a third adjusting member 123 and a fourth adjusting member 124, the third adjusting member 123 is connected to one end of the upper clamping rod 111 and the lower clamping rod 112, the fourth adjusting member 124 is connected to the other end of the upper clamping rod 111 and the lower clamping rod 112. The third adjusting member 123 and the fourth adjusting member 124 are used to control the two ends of the upper clamping rod 111 and the lower clamping rod 112 to move towards or away from each other. The third adjusting member 123 and the fourth adjusting member 124 are both telescopic structures. Specifically, the telescopic structure is a mechanical telescopic rod or a hydraulic telescopic cylinder.
[0044] In one of the embodiments, the feeding angle adjusting device 100 further comprises a heating member 130, the heating member 130 is arranged between the adjacent clamping mechanisms 110 and surrounds the driven steel belt 10, the heating member 130 heats the driven steel belt 10 to 800-1500℃. Specifically, the heating member 130 is an inductive coil heating member 130, the coil is spacedly wound outside the flat steel plate. By heating, the yield strength of the steel belt is rapidly reduced, and it is easier to elongate the side edges of the driven steel belt 10. Preferably, the heating member 130 heats the driven steel belt 10 to 900℃, 1000℃, 1200℃.
[0045] In one of the embodiments, the feeding angle adjusting device 100 further comprises a protective cover (not shown in the figure), the protective cover is arranged outside the heating member 130 and the driven steel belt 10, and the protective cover is filled with inert gas when the heating member 130 is working. Specifically, the protective cover is made of flexible material and forms an accommodation space, which can at least wrap the preset adjustment area and the heating member 130, and can also wrap the clamping mechanism 110 and the adjusting mechanism 120. Preferably, the inert gas can be carbon dioxide gas.
[0046] In one of the embodiments, a cooling device is arranged downstream of the feeding angle adjusting device 100. Specifically, the cooling device is a air-cooled cooling device or a water-cooled cooling device.
[0047] In one of the embodiments, the feeding angle adjusting device 100 is movably arranged on a guide rail, and the feeding angle adjusting device 100 moves along with the driven steel belt 10. As the driven steel belt 10 is delivered to the coiling mechanism, the feeding angle adjusting device 100 slides on the rail to follow the adjustment step synchronously with the coiling step.
[0048] In one of the embodiments, the driven steel strip 10 is unwound by an unwinding mechanism, and an arc-shaped track is arranged below the unwinding mechanism, so that the unwinding mechanism moves on the arc-shaped track, and during the adjustment of the driven steel strip 10 entering the feeding angle adjustment device 100, the unwinding mechanism moves left and right along with the change of the feeding angle adjustment device 100, wherein, “left and right” is defined as the extension direction of the arc-shaped track.
[0049] In one of the embodiments, the feeding angle adjustment device 100 further comprises a sensing element and a controller (not shown in the figure), the sensing element is used to detect the seam distance of the spiral butt joint after the driven steel strip 10 is coiled, and the value of the seam distance is fed back to the controller, and the controller controls the clamping mechanism 110 to clamp the driven steel strip 10 and controls the adjusting mechanism 120 to work.
[0050] Specifically, the sensing element can be a laser (or grating) sensor, and the seam distance is calculated through the triangular relationship between the laser beam, the reflection light path and the receiver. The sensing element can also be a CCD / CMOS camera element. When the sensing element detects that the seam distance of the driven steel strip 10 after coiling exceeds a preset value, the value of the seam distance is fed back to the controller, the controller controls the clamping mechanism 110 to clamp the preset adjustment area of the driven steel strip 10, and controls the adjusting mechanism 120, the heating element 130 and other structures to work.
[0051] It can be understood that the seam distance value includes positive and negative values, the positive value is that the two side edges of the spiral butt joint have a gap with each other, and the negative value is that the two side edges of the spiral butt joint overlap each other.
[0052] The application also provides a feeding adjustment method for a steel strip in a double-walled spiral welded pipe, comprising the following steps:
[0053] S100, determining a preset adjustment area on the driven steel strip 10 to be coiled;
[0054] S200, clamping the two sides of the driven steel strip 10 in the thickness direction around the preset adjustment area;
[0055] S300, after clamping, heating the preset adjustment area, stretching one side edge of the driven steel strip 10 in the preset adjustment area to the required length, so that the driven steel strip produces a preset angle bend, i.e. a sickle bend, when the steel strip after the angle bend is spirally coiled, the seam distance of the spiral butt joint is adjusted to the allowable range, so that normal welding is realized.
[0056] In one of the embodiments, the step of determining the preset adjustment area in the step S100 further comprises the following steps:
[0057] S110, detecting the seam distance of the spiral butt joint after the driven steel belt 10 is coiled. Specifically, the detection element synchronously feeds back the value of the seam distance to the controller.
[0058] S120, when the seam distance exceeds the preset value, determining the downstream area where the preset value is exceeded as the preset adjustment area. The controller or the detection element compares the seam distance with the preset value. When the seam distance exceeds the preset value, it is considered that the area that needs to be coiled immediately needs to be adjusted, and the downstream area where the preset value is exceeded is limited as the preset adjustment area.
[0059] Specifically, step S200 further comprises: controlling the clamping mechanism to perform clamping action. The controller controls the third adjusting member 123 and the fourth adjusting member 124 to extend and retract, so as to drive the upper clamping rod 111 and the lower clamping rod 112 to move towards each other, clamp the two sides of the driven steel belt 10 in the thickness direction, and make the preset adjustment area located between the two adjacent clamping mechanisms 110.
[0060] Specifically, step S300 further comprises: the controller controls the first adjusting member 121 and / or the second adjusting member 122 to extend and retract, so as to stretch the first side edge and / or the second side edge of the driven steel belt 10 by a corresponding length, and at the same time, the controller controls the heating member 130 to start, and heats the preset adjustment area.
[0061] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.
[0062] The above-mentioned embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the patent application scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A device for adjusting the angle of entry of a driven strip in the manufacture of double- wall spiral welded pipe, characterised in that, The double-wall spiral welded pipe comprises a main steel strip and a driven steel strip, the main steel strip is spirally formed into a pipe blank, the driven steel strip is spirally formed through a forming mechanism and is sleeved and welded with the pipe blank during the spiral forming process, the feeding angle adjusting device is arranged upstream of the forming mechanism, the feeding angle adjusting device comprises: a clamping mechanism, at least two groups of the clamping mechanism are arranged, the clamping mechanism is used for clamping or releasing the driven steel strip, two groups of the clamping mechanism are arranged at intervals in the length direction of the driven steel strip; each group of the clamping mechanism comprises a first end and a second end, the first end and the second end are respectively located at two side edges in the length direction of the driven steel strip; and an adjusting mechanism, the adjusting mechanism comprises a first adjusting member and a second adjusting member, the first adjusting member is connected between the first ends of two adjacent groups of the clamping mechanism, the second adjusting member is connected between the second ends of two adjacent groups of the clamping mechanism, the first adjusting member is used for adjusting the relative distance of the first ends of two adjacent groups of the clamping mechanism, and the second adjusting member is used for adjusting the relative distance of the second ends of two adjacent groups of the clamping mechanism, so that at least one side edge of the driven steel strip is elongated, and the driven steel strip is bent at a preset angle in the length direction.
2. The device for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 1, characterized in that, The first adjusting member and the second adjusting member are both telescopic structures.
3. The device for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 1, characterized in that, The clamping mechanism comprises an upper clamping rod and a lower clamping rod, the upper clamping rod and the lower clamping rod are respectively arranged at two opposite sides in the thickness direction of the driven steel strip; the upper clamping rod and the lower clamping rod can be close to each other to clamp the driven steel strip.
4. The device for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 3, characterized in that, The adjusting mechanism comprises a third adjusting member and a fourth adjusting member, the third adjusting member is connected to one end of the upper clamping rod and the lower clamping rod, and the fourth adjusting member is connected to the other end of the upper clamping rod and the lower clamping rod.
5. The apparatus for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 1, characterized in that, The feeding angle adjusting device further comprises a heating member, the heating member is arranged between two adjacent groups of the clamping mechanism and surrounds the driven steel strip, and the heating member heats the driven steel strip to 800-1500 DEG C.
6. The device for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 5, characterized in that, The feeding angle adjusting device further comprises a protective cover, the protective cover surrounds the heating member and the driven steel strip, and the protective cover is filled with inert gas when the heating member works.
7. The apparatus for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 1, characterized in that, A cooling device is arranged downstream of the feeding angle adjusting device.
8. The apparatus for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 1, characterized in that, The feeding angle adjusting device is movably arranged on a guide rail, the feeding angle adjusting device moves on the guide rail along with the driven steel strip and resets after work is completed.
9. The apparatus for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 1, characterized in that, The feeding angle adjusting device further comprises a sensing element and a controller, the sensing element is used for detecting the seam distance of the non-welded spiral butt joint after the driven steel strip is formed, when the seam distance exceeds a preset value, the value of the seam distance is fed back to the controller, the controller controls the clamping mechanism to clamp the driven steel strip, and controls the adjusting mechanism to work.
10. The apparatus for adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 1, characterized in that, The driven steel strip is unwound through an unwinding mechanism, an arc-shaped track is arranged below the unwinding mechanism, so that the unwinding mechanism moves on the arc-shaped track, and the unwinding mechanism moves left and right in coordination with the change of the feeding angle adjusting device during the process that the driven steel strip enters the feeding angle adjusting device for adjustment.
11. A method of adjusting the angle of entry of a driven strip in a double- wall spiral welded pipe, characterized in that, The method comprises the following steps: determining a preset adjusting area on the driven steel strip to be coiled; clamping the two opposite sides of the driven steel strip in the thickness direction around the preset adjusting area; after clamping, heating the preset adjusting area, and stretching one side of the driven steel strip in the preset adjusting area to the required length, so that the driven steel strip produces a preset angle bend when coiled in the length direction.
12. The method of adjusting the angle of entry of the driven strip in the double- wall spiral welded pipe according to claim 11, characterized in that, The step of determining the preset adjusting area further comprises the steps of: detecting the pitch of the spiral butt joint of the driven steel strip after coiling; when the pitch exceeds the preset value, determining the downstream area where the preset value is exceeded as the preset adjusting area; The step of clamping the driven steel strip further comprises controlling the clamping mechanism to clamp.