Electric automatic annular scanning frame

Abstract

The utility model relates to the technical field of nondestructive testing, in particular to an electric automatic annular scanning frame. Comprising a chain type scanning frame and a hanging bracket detachably installed on the chain type scanning frame, a guide rail which deflects and slides around the axis of the chain type scanning frame is arranged on the hanging bracket, the guide rail is in a semi-ring shape, and an installation frame used for installing a detector is detachably installed on the guide rail. The detection position is in a whole-cycle state, the detection position is not changed, the scanning range does not deviate, the accuracy of data acquisition can be improved, welding seams can be accurately aligned without being held by hands, and scanning is more convenient. And the chain type scanning frame is prevented from rotating and being axially staggered along the PE pipe, so that the influence on the detection accuracy caused by deviation of a detection position is avoided.

Description

Technical Field

[0001] This utility model relates to the field of non-destructive testing technology, and in particular to an electric automatic circular scanning frame. Background Technology

[0002] Hot-melt welding is a common connection method for natural gas PE pipes. Its principle is to use heat energy to melt and fuse the materials at both ends of the pipe together, forming a strong connection. Hot-melt welding technology for natural gas PE pipes is an important means to ensure the quality and safety of natural gas pipeline connections; the quality of the weld directly affects the stability of the pipeline connection and the operation of the natural gas transmission system.

[0003] Therefore, after the PE pipe is hot-melt welded, the weld seam needs to be inspected. Traditional weld seam scanning racks are either handheld, with unstable pushing speed, resulting in low accuracy and high labor intensity; or matrix type, which has a high equipment cost.

[0004] Therefore, this utility model provides an electric automatic circular scanning frame that reduces equipment costs while ensuring detection accuracy. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art by proposing an electric automatic circular scanning frame.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electric automatic circular scanning frame includes a chain scanning frame and a hanger detachably mounted on the chain scanning frame. The hanger is provided with a guide rail that slides around the axis of the chain scanning frame. The guide rail is semi-circular, and a mounting bracket for mounting a detector is detachably mounted on the guide rail.

[0008] Preferably, the chain scanning frame includes multiple sets of sequentially hinged movable chain links, each movable chain link is provided with a set of mounting wheels, and the ends of the movable chain links at both ends are hinged with end chain links, and a locking structure is provided between the end chain links.

[0009] Preferably, the movable link is T-shaped and placed on its side, with a groove on the vertical part of the movable link, and the horizontal ends of adjacent movable links are hinged in the groove.

[0010] Preferably, the vertical part of the movable link is provided with a through mounting hole, into which a rotating shaft is inserted, and the horizontal part of the movable connection is provided with a through hole for the rotating shaft to pass through.

[0011] Preferably, each set of mounting wheels includes two sets of wheel bodies, which are rotatably mounted at both ends of the rotating shaft.

[0012] Preferably, the locking structure includes a connecting hole on one end link and a screw hole on the other end link corresponding to the connecting hole.

[0013] Preferably, the locking structure further includes an opening groove spaced apart from the connecting hole and a second screw hole spaced apart from the first screw hole. The opening groove and the second screw hole are located on the end link on the side opposite to the connecting hole and the first screw hole, respectively, away from the axis of the chain scanning frame.

[0014] Preferably, four guide wheels are installed in a distributed manner at the four corners of the hanger, and the inner and outer walls of the guide rail are provided with concave grooves. The four sets of guide wheels are symmetrically arranged in pairs along the guide rail, and the four sets of guide wheels are embedded in the grooves.

[0015] A worm gear reducer is fixedly installed on the hanger. A gear is fixed on the output shaft of the worm gear reducer, and the gear meshes with a half-tooth ring fixed on the guide rail.

[0016] Compared with the prior art, this utility model provides an electric automatic circular scanning frame, which has the following beneficial effects:

[0017] 1. In use, the chain-type scanning frame is attached to the outer wall of the PE pipe. After the detector is started, the guide rail and hanger deflect and rotate around the PE pipe, thus performing a stable scan of the weld seam to obtain stable data. Then, by adjusting the installation angle of the chain-type scanning frame, a full circumference scan can be performed on the PE pipe to obtain complete circumference data. With the detection position remaining constant and the scanning range unchanged, the accuracy of data acquisition is improved. Furthermore, the weld seam can be precisely aligned without manual operation, making scanning more convenient.

[0018] 2. In this utility model, the detector rotates on its own, while the chain scanning frame remains stationary during the detector's scanning. This also avoids the chain scanning frame from shifting and becoming misaligned along the PE pipe axis, which could lead to deviations in the detection position and affect the accuracy of the detection.

[0019] 3. This utility model adopts a single detector turnover form design, which is more cost-effective than matrix arrangement.

[0020] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention installed on a PE pipe.

[0022] Figure 2 For the present utility model Figure 1A three-dimensional schematic diagram of the left side of the scanning frame.

[0023] Figure 3 This is a three-dimensional axial view of the scanning frame of this utility model on the right side.

[0024] Figure 4 This is a bottom-view perspective view of the scanning frame of this utility model.

[0025] Figure 5 This is a three-dimensional assembly diagram of the hanger, guide rail, and movable chain link of this utility model.

[0026] Figure 6 This is a cross-sectional schematic diagram of the connection between the guide rail and the hanger of this utility model.

[0027] Figure 7 This is a three-dimensional view of the hanger of this utility model from below.

[0028] Figure 8 This is a three-dimensional schematic diagram of a single movable link of the present invention.

[0029] Figure 9 This is a schematic diagram of the end link of this utility model.

[0030] In the diagram: 1. Chain-type scanning frame; 2. Hanger; 3. Guide rail; 4. Guide wheel; 5. Mounting bracket; 6. Gear; 7. Gear ring; 8. Worm gear reducer; 101. Moving chain link; 102. End chain link; 103. Connecting hole; 104. Screw hole one; 105. Opening slot; 106. Screw hole two; 107. Mounting wheel. Detailed Implementation

[0031] The following will refer to the appendix in the embodiments of this utility model. Figure 1-9 The technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0032] Example 1: In order to reduce equipment costs while ensuring detection accuracy, this example provides an electric automatic ring scanning frame, including a chain scanning frame 1, which is ring-shaped and fitted onto the side of the hot melt weld of the PE pipe to be inspected.

[0033] The chain scanning frame 1 is equipped with a hanger 2. The hanger 2 and the chain scanning frame 1 can be disassembled and assembled, which facilitates processing, separate assembly, and individual disassembly and maintenance, so as to avoid the whole frame being scrapped due to damage to a certain part.

[0034] The hanger 2 is equipped with a guide rail 3, which is semi-circular. The opening spacing of the semi-circular structure allows the PE pipe to pass through, so that the chain-type scanning rack 1 can be placed through the PE pipe during installation.

[0035] The guide rail 3 is deflected on the hanger 2, and the deflection axis coincides with the axis of the chain scanning frame 1 when it is fastened to the PE pipe in the expanded state.

[0036] The guide rail 3 is equipped with a mounting bracket 5 for mounting the testing instrument. When installing the testing instrument, a bracket is used to hold the microwave probe of the testing instrument in place, ensuring that the probe is stably aligned with the weld and preventing displacement during testing. The mounting bracket 5 is detachable from the guide rail 3, facilitating processing, reassembly, and individual disassembly and maintenance, preventing the entire instrument from being scrapped due to damage to a single component.

[0037] The above method involves the following steps: During use, the chain-type scanning frame 1 is fastened to the outer wall of the PE pipe. After the detector is started, the guide rail 3 and hanger 2 deflect and rotate around the PE pipe, thus performing a stable scan of the weld seam to obtain stable data. Then, by adjusting the installation angle of the chain-type scanning frame 1, a full circumference scan can be performed around the PE pipe to obtain complete circumference data.

[0038] The detection position is in an integer state. The detection position remains unchanged and the scanning range will not deviate, which will improve the accuracy of data acquisition. Moreover, it can accurately align the weld without hand-holding, making scanning more convenient.

[0039] Furthermore, the detector rotates on its own, while the chain scanning frame 1 remains stationary during the detector's scanning process. This also prevents the chain scanning frame 1 from shifting along the PE pipe axis during rotation, which could lead to deviations in the detection position and affect the accuracy of the detection.

[0040] In a further embodiment of this solution, as described in Example 2, the chain-type scanning frame 1 includes multiple sets of movable chain links 101. The beginning and end ends of adjacent movable chain links 101 are hinged together by pre-supported bolts. Each end of the movable chain link 101 is hinged with an end link 102, and a locking structure is provided between the end links 102. The locking structure connects the two sets of end links 102, which, in conjunction with the multiple sets of movable chain links 101, form a chain-link ring-shaped support.

[0041] Each movable link 101 is equipped with a set of mounting wheels 107. When installed on a PE pipe, the mounting wheels 107 abut against the outer wall of the PE pipe, supporting the movable link 101 and the end link 102, thereby suspending the entire chain scanning frame 1. The mounting wheels 107 provide a locking support, reducing the contact area between the chain scanning frame 1 and the PE pipe, making the relocation of the chain scanning frame 1 easier.

[0042] Since the end link 102 and the movable link 101 are supported, and multiple sets of movable links 101 are provided, both the movable link 101 and the end link 102 can be arc-shaped and connected sequentially to form a ring. Alternatively, they can be straight plates to form a polygon, with the size and number of sets conforming to the requirement of supporting the movable link 101 and the end link.

[0043] Each of the movable chain links 101 has multiple insertion holes spaced apart at its horizontal position. The hanger 2 has screw holes corresponding to the insertion holes. The hanger 2 is detachably connected by bolts passing through the insertion holes and screwed into the screw holes. This allows the hanger 2, carrying the detector, to be moved relative to the chain scanning frame 1, and may be disassembled.

[0044] On the inner side of hanger 2, that is, the side facing the PE pipe, there is an auxiliary wheel. The auxiliary wheel also abuts against the outer wall of the PE pipe to achieve self-positioning and auxiliary support.

[0045] In a further embodiment of this solution, as described in Example 3, the movable link 101 is T-shaped and placed on its side. A groove is provided in the vertical portion of the movable link 101, and the horizontal ends of adjacent movable links 101 are hinged within the groove. This forms a hinged clearance structure, providing a base for the movement of adjacent movable links 101.

[0046] The vertical portion of the movable link 101 has a through mounting hole, into which a rotating shaft is inserted. The horizontal end of the movable connection has a through hole for the rotating shaft to pass through. This enables the hinge connection between adjacent movable links 101.

[0047] Each set of mounting wheels 107 includes two sets of wheel bodies, which are rotatably mounted at both ends of the rotating shaft. The mounting wheels 107 and the movable chain link 101 share a rotating shaft, simplifying the assembly structure. Furthermore, the mounting wheels 107 include two wheel bodies, forming a double-row support, thereby preventing the detector from tilting to the side.

[0048] The hinge structure between movable link 101 and end link 102 is the same as the hinge structure between movable links 101.

[0049] Example 4: The locking structure includes a connecting hole 103 on one end link 102 and a screw hole 104 on the other end link 102 corresponding to the connecting hole 103.

[0050] Both sets of end links 102 have parallel ends and mounting surfaces, ensuring that the connecting hole 103 and the threaded hole are axially aligned. During installation, the bolts are passed through the connecting hole 103 and screwed into the threaded hole 104. Tightening locks both sets of end links 102, allowing the chain scanning frame 1 to grip the PE pipe. Under the constraint of the tightening force, the chain scanning frame 1 remains stable even when the detector deflects.

[0051] The locking structure also includes an opening slot 105 spaced apart from the connecting hole 103 and a second screw hole 106 spaced apart from the first screw hole 104. The opening slot 105 and the second screw hole 106 are located on the end link 102, corresponding to the connecting hole 103 and the first screw hole 104, on the side away from the axis of the chain-type scanning frame 1. To achieve the clearance of the connection position, a double connection position can be set. During on-site assembly, the choice can be made according to the conditions, such as the length of the bolt and the type of wrench (adjustable wrench, swivel wrench, etc.).

[0052] In Example 5, a further embodiment of this solution, four guide wheels 4 are distributed at the four corners of the hanger 2. The inner and outer walls of the guide rail 3 have recessed grooves. The four sets of guide wheels 4 are symmetrically arranged in pairs along the guide rail 3, and are embedded in the grooves. This allows for the deflection installation of the guide rail 3 on the hanger 2, and the grooves are open at both ends, allowing the guide wheels 4 to be inserted from the ends, making assembly and disassembly more convenient.

[0053] A worm gear reducer 8 is bolted to the hanger 2. A gear 6 is fixed to the output shaft of the worm gear reducer 8. The gear 6 meshes with a semi-tooth ring 7 fixed to the guide rail 3. The semi-tooth ring 7 is fastened to the guide rail 3 with countersunk screws. The worm gear reducer 8 drives the gear 6 to rotate, and the gear 6 drives the tooth ring 7, which in turn moves the guide rail 3, achieving an automated drive effect for the guide rail 3 and making the testing process more labor-saving.

[0054] The worm gear reducer 8 has a self-locking property; it can lock itself after being closed to prevent the gear ring 7 from derailing from the gear 6 and causing the guide rail 3 to slip off.

[0055] Alternatively, a screw hole four can be provided on the hanger 2 directly above the mounting position of the guide rail 3, and a corresponding limiting hole is provided on the upper end of the guide rail 3. When not in use, a bolt is screwed into the screw hole four, and the bolt is inserted into the limiting hole to lock the guide rail 3.

[0056] It is also equipped with a position sensor to realize the opening and closing control and forward and reverse operation of the worm gear reducer 8.

[0057] Both gear 6 and gear ring 7 have helical teeth to reduce the probability of tooth collision during assembly.

[0058] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric automatic circular scanning rack, characterized in that, It includes a chain scanning frame (1) and a hanger (2) that can be detachably installed on the chain scanning frame (1). The hanger (2) is provided with a guide rail (3) that slides around the axis of the chain scanning frame (1). The guide rail (3) is semi-circular and a mounting bracket (5) for installing the detector can be detachably installed on the guide rail (3).

2. The electric automatic circular scanning rack according to claim 1, characterized in that, The chain scanning frame (1) includes multiple sets of movable chain links (101) that are hinged in sequence. Each movable chain link (101) is provided with a set of mounting wheels (107). The ends of the movable chain links (101) at both ends are hinged with end chain links (102), and there is a locking structure between the end chain links (102).

3. The electric automatic circular scanning rack according to claim 2, characterized in that, The movable link (101) is T-shaped and placed on its side. The vertical part of the movable link (101) is provided with a groove, and the horizontal ends of adjacent movable links (101) are hinged in the groove.

4. The electric automatic circular scanning rack according to claim 3, characterized in that, The vertical part of the movable link (101) is provided with a through mounting hole, into which a rotating shaft is inserted. The horizontal part of the movable connection is provided with a through hole for the rotating shaft to pass through.

5. The electric automatic circular scanning rack according to claim 4, characterized in that, Each set of mounting wheels (107) includes two sets of wheel bodies, which are rotatably mounted at both ends of the shaft.

6. The electric automatic circular scanning rack according to claim 2, characterized in that, The locking structure includes a connecting hole (103) on one end link (102) and a screw hole (104) on the other end link (102) corresponding to the connecting hole (103).

7. The electric automatic circular scanning rack according to claim 6, characterized in that, The locking structure also includes an opening groove (105) spaced apart from the connecting hole (103) and a screw hole (106) spaced apart from the screw hole (104). The opening groove (105) and the screw hole (106) are located on the end link (102) on the side opposite to the axis of the chain scanning frame (1) corresponding to the connecting hole (103) and the screw hole (104).

8. The electric automatic circular scanning rack according to claim 1, characterized in that, The hanger (2) has four guide wheels (4) installed in a four-corner distribution. The inner and outer walls of the guide rail (3) are provided with recessed grooves. The four sets of guide wheels (4) are symmetrically arranged in pairs along the guide rail (3) and the four sets of guide wheels (4) are embedded in the grooves. A worm gear reducer (8) is fixedly installed on the hanger (2). A gear (6) is fixed on the output shaft of the worm gear reducer (8). The gear (6) meshes with a half-tooth ring (7) fixed on the guide rail (3).

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