Suspension cable type ray detection device

Abstract

The invention discloses a suspension cable type ray detection device which comprises two sets of supporting mechanisms capable of being fixed to a workpiece, a bearing cable connected between the two sets of supporting mechanisms and a moving mechanism installed on the bearing cable, and the two ends of the bearing cable are installed on the corresponding supporting mechanisms in a lifting mode respectively. The moving mechanism comprises a bottom plate and a driving motor mounted on the bottom plate, the output end of the driving motor is connected with a roller, the roller is in contact with the bearing cable, and an X-ray machine can be fixed below the bottom plate. According to the invention, the problems of low efficiency and high safety risk coefficient during radiographic inspection of high-altitude rows of welded junctions in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the field of ray detection in industrial non-destructive testing, and in particular to a cable-suspended ray detection device. Background Art

[0002] X-ray testing is a non-destructive testing method that uses the ability of radiation to penetrate objects to detect internal defects. When radiation penetrates an object, if there are defects inside the object, the intensity of the radiation will change. Therefore, by recording this change on film, the defects inside the object can be identified.

[0003] Radiographic inspection is widely used in the industrial field, especially in the detection of weld defects. In order to ensure the detection effect of defects, the radiographic inspection specification requires that the X-ray machine should be at a certain distance from the workpiece. When detecting small-diameter pipe welds, it is also required to be offset horizontally to the center of the weld. In industrial equipment, welds are often arranged in rows in a vertical plane, such as the water-cooled wall system of a thermal power plant. In the prior art, it is usually necessary to set up a scaffolding so that the operator can move the X-ray machine to the position of each weld for inspection. Since the distribution position of the welds has a height difference, the operator needs to keep going back and forth on the scaffolding to adjust the position of the X-ray machine.

[0004] During the implementation process, the inventors found that the above-mentioned prior art has at least the following defects: since the weld is located at a vertical free-air surface, operators need to set up and dismantle scaffolding, constantly walk or climb at high altitudes, and frequently take off and put on safety belts. Therefore, not only is the procedure cumbersome and inefficient, but the safety risk factor is also high. Summary of the invention

[0005] The embodiment of the present application solves the problem of low efficiency and high safety risk factor in the prior art when performing ray inspection on rows of welds at high altitude by providing a suspended cable ray inspection device.

[0006] In order to solve the above technical problems, the present invention adopts the following technical scheme: a suspended cable-type X-ray detection device, comprising two groups of supporting mechanisms that can be fixed on a workpiece, a load-bearing cable connected between the two groups of supporting mechanisms, and a moving mechanism installed on the load-bearing cable. The two ends of the load-bearing cable can be respectively installed on the corresponding supporting mechanisms in a liftable manner. The moving mechanism comprises a base plate and a driving motor installed on the base plate. The output end of the driving motor is connected to a roller, which is in contact with the load-bearing cable. An X-ray machine can be fixed under the base plate.

[0007] Since the support mechanism can be fixed to the workpiece, the mobile mechanism can walk on the load-bearing rope between the two sets of support mechanisms, and the X-ray machine is fixed to the mobile mechanism, the mobile mechanism can drive the X-ray machine to move along the load-bearing rope in the vertical plane close to the weld; at the same time, the two ends of the load-bearing rope can be installed on the corresponding support mechanism, so the height of the load-bearing rope can also be adjusted to meet the inspection requirements of different positions. This process does not require the erection of scaffolding, nor does it require operators to walk in the air, thus improving operational efficiency and reducing safety risks.

[0008] Furthermore, the supporting mechanism includes an upper supporting body and a lower supporting body, and a ball screw is vertically installed between the upper supporting body and the lower supporting body, and the ball screw is driven by a motor. Correspondingly, nuts are respectively installed at both ends of the load-bearing cable, and the nut cooperates with the ball screw; the load-bearing cable will produce sag under the action of its own weight and the weight of the X-ray machine, causing the X-ray machine to have a height deviation during the movement, so the adjustment of the ball screw can offset the downward displacement caused by the sag, thereby ensuring the accuracy of X-ray detection.

[0009] Furthermore, two load-bearing cables are connected between the two groups of support mechanisms, and correspondingly, two ball screws are arranged side by side between the upper support body and the lower support body; the two load-bearing cables can provide more stable support for the moving mechanism, making the moving mechanism move more smoothly.

[0010] Furthermore, the upper support body and the lower support body respectively include three mutually perpendicular support rods, wherein one end of the three support rods are fixedly connected to each other, and the other ends of the three support rods are connected by diagonal rods; thus, when the support mechanism is fixed to the detected room, the support mechanism has strong stability.

[0011] Furthermore, the upper and lower ends of the ball screw are respectively connected to the upper support body and the lower support body through connecting blocks, and the connecting blocks are nested in the outer circumference of the support rod; thereby, the distance between the ball screw and the workpiece can be adjusted to ensure that the distance between the X-ray machine and the workpiece meets the specification requirements.

[0012] Furthermore, a connecting rod is installed on one side of the base plate of the movable mechanism, and an electromagnet is installed on the end of the connecting rod away from the chassis; when the X-ray machine moves to the position to be detected, the movable mechanism and the X-ray machine can be further fixed by adsorbing the electromagnet on the surface of the workpiece.

[0013] Furthermore, the driving motor on the bottom plate of the moving mechanism is a double-headed motor, and two output ends of the double-headed motor are respectively connected to rollers through a gear box.

[0014] Furthermore, the outer circumferential surface of the roller is concave toward the center of the roller; thereby increasing the contact area between the roller and the load-bearing cable, thereby increasing the friction force and effectively preventing the moving wheel from slipping on the load-bearing cable.

[0015] Furthermore, an encoder is installed on the gear box.

[0016] It can be seen from the above technical solutions that the present invention has at least the following technical effects or advantages: 1. Since the support mechanism can be fixed to the workpiece, the mobile mechanism can walk on the load-bearing rope between the two sets of support mechanisms, and the X-ray machine is fixed to the mobile mechanism, the mobile mechanism can drive the X-ray machine to move along the load-bearing rope in the vertical plane close to the weld; at the same time, the two ends of the load-bearing rope can be installed on the corresponding support mechanism, so the height of the load-bearing rope can also be adjusted to meet the inspection requirements of different positions. This process does not require the erection of scaffolding, nor does it require operators to walk in the air, thus improving operational efficiency and reducing safety risks.

[0017] 2. The load-bearing cable can slide sideways to adjust the distance between the X-ray machine and the workpiece, which not only improves the detection efficiency, but also improves the accuracy of X-ray detection.

[0018] 3. The electric energy required by the moving mechanism is provided by the cable of the X-ray machine. The cable is suspended in the air and moves with the movement of the moving sports car, thus avoiding wear and tear of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A side view of the present invention as a whole; Figure 3 It is a structural schematic diagram of the moving mechanism in the present invention; Figure 4 It is a structural schematic diagram of the bottom plate in the moving mechanism.

[0020] Explanation of the reference numerals in the accompanying drawings: 1. Support mechanism, 101. Support rod, 102. Diagonal rod, 2. Load-bearing cable, 3. Moving mechanism, 4. Upper support body, 5. Lower support body, 6. Ball screw, 7. Base plate, 8. Double-headed motor, 9. Gear box, 10. Encoder, 11. Roller, 12. Connecting rod, 13. Electromagnet. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0022] The present invention discloses a cable-suspended radiographic detection device, which comprises two sets of supporting mechanisms 1, a load-bearing cable 2 connected between the two sets of supporting mechanisms 1, and a moving mechanism 3 installed on the load-bearing cable 2. The moving mechanism 3 can move along the load-bearing cable 2. In one example, the two sets of supporting mechanisms 1 can be fixed on a workpiece to be detected (such as a boiler water-cooled wall), an X-ray machine can be fixed to the moving mechanism 3 and connected with a cable, and then the position of the moving mechanism 3 can be adjusted to perform radiographic detection on the weld.

[0023] The support mechanism 1 includes an upper support body 4 and a lower support body 5. Figure 1 , Figure 2 As shown, the upper support body 4 is located above the lower support body 5, and the upper support body 4 and the lower support body 5 each include three mutually perpendicular support rods 101, one end of the three support rods 101 are fixedly connected to each other, and the other ends of the three support rods 101 are connected by inclined rods 102, thereby forming an approximately pyramid-shaped structure. Among them, two support rods 101 and one inclined rod 102 in the upper support body 4 are fixed to the workpiece, and two support rods 101 and one inclined rod 102 in the lower support body 5 are fixed to the workpiece. When the upper support body 4 and the lower support body 5 are fixed to the workpiece, another support rod 101 of the upper support body 4 and another support rod 101 of the lower support body 5 are in a parallel posture, and a ball screw 6 is also installed between the two parallel support rods 101, and the ball screw 6 is vertically arranged for installing one end of the load-bearing cable 2. Correspondingly, a nut is installed at one end of the load-bearing cable 2, and the nut cooperates with the ball screw 6. When the ball screw 6 rotates, the nut can move up and down relative to the ball screw 6, thereby adjusting the height of the load-bearing cable 2.

[0024] In this embodiment, two load-bearing cables 2 are connected between the two groups of support mechanisms 1, and correspondingly, two ball screws 6 are also provided between the upper support body 4 and the lower support body 5 of each support mechanism 1. Thus, the two load-bearing cables 2 can cooperate with the moving mechanism 3, so that the moving mechanism 3 can move more smoothly on the load-bearing cables 2. The moving mechanism 3 includes a base plate 7 and a driving motor installed on the base plate 7, and the output end of the driving motor is connected to a roller 11, and the roller 11 is in contact with the load-bearing cable 2. An X-ray machine is fixed below the base plate 7, and thus the driving motor drives the roller 11 to rotate, so that the X-ray machine can move relative to the load-bearing cable 2.

[0025] Specifically in this embodiment, Figure 3 As shown, the driving motor on the bottom plate 7 is a double-headed motor 8, and the two output ends of the double-headed motor 8 extend to the front and rear ends of the bottom plate 7 in the length direction. Gear boxes 9 are also installed above the front and rear ends of the bottom plate 7. Rollers 11 are installed on the left and right sides of the gear box 9 through a rotating shaft. The rollers 11 are located on the load-bearing cable 2. The two output ends of the double-headed motor 8 are respectively connected to the gear boxes 9 at the front and rear ends, so that when the double-headed motor 8 rotates, the mobile mechanism 3 can move relative to the load-bearing cable 2. In addition, an encoder 10 is also installed on the gear box 9, and the encoder 10 can record the number of rotations of the roller 11, and then calculate the distance traveled by the mobile mechanism 3 on the load-bearing cable 2. The outer circumferential surface of the roller 11 is concave toward the center of the roller 11, thereby increasing the contact area between the outer circumferential surface of the roller 11 and the load-bearing cable 2, effectively preventing the roller 11 and the load-bearing cable 2 from slipping.

[0026] On the other hand, the upper and lower ends of the ball screw 6 are connected to the upper support body 4 and the lower support body 5 respectively through connecting blocks, wherein the connecting blocks are respectively embedded in the outer periphery of the support rod 101 of the upper support body 4 or the lower support body 5. Thus, the ball screw 6 can slide laterally relative to the support mechanism 1 to adjust the distance between the ball screw 6 and the workpiece, thereby ensuring that the distance between the X-ray machine and the workpiece meets the specification requirements.

[0027] In this embodiment, if Figure 4 As shown, the bottom plate 7 is provided with binding holes near its four corners, through which the X-ray machine can be fixed to the bottom of the bottom plate 7. In addition, a support hole is also provided on one side of the bottom plate 7. When the moving mechanism 3 is located above the weighing cable, the support hole is located on the side of the bottom plate 7 close to the workpiece. The support hole is connected to an electromagnet 13 through a connecting rod 12, wherein one end of the connecting rod 12 is connected to the bottom plate 7 through a bolt. When the bolt is loosened, the connecting rod 12 can rotate relative to the bottom plate 7; the other end of the connecting rod 12 is hinged to the electromagnet 13. The electromagnet 13 is magnetic when energized, so that when the moving mechanism 3 moves to the specified position, the moving mechanism 3 and the X-ray machine can be further fixed.

[0028] When the present invention is used, the working process is as follows: Connect the two ends of the load-bearing cable 2 to the ball screw 6, and make the nut be at the highest position of the ball screw 6. Then fix the two sets of support mechanisms 1 to the workpiece to be inspected through U-bolts with baffles, and ensure that the two ends of the load-bearing cable 2 are at the same horizontal elevation. Then adjust the distance from the ball screw 6 to the workpiece according to the requirements of the radiographic inspection, rotate the connecting rod 12 to the appropriate position, and tighten the bolts at the connection between the connecting rod 12 and the bottom plate 7 to make the electromagnet 13 close to the surface of the workpiece.

[0029] Through the binding hole, the X-ray machine is fixed under the moving mechanism 3. In the free state, the moving mechanism 3 moves to the middle position of the load-bearing cable 2 to observe whether the X-ray machine and the workpiece under inspection meet the specification requirements. If the error is large, adjust the fixed position of the supporting mechanism 1. Since the moving mechanism 3 can move from the middle position to the two end positions of the load-bearing cable 2, the moving path of the moving mechanism 3 is an elliptical arc. Therefore, the vertical height to be compensated can be calculated through the horizontal distance of the moving mechanism 3 and the actual walking distance (elliptical arc length). The compensation height is realized by the ball screw 6.

[0030] According to the requirements of the radiation detection, the number of times the X-ray machine needs to move is determined. After the moving mechanism 3 reaches the specified position, the electromagnet 13 is energized and adsorbed on the surface of the workpiece, thereby further fixing the moving mechanism 3 and the X-ray machine. The moving mechanism 3 and the ball screw 6 are both driven by a motor, so the distance the X-ray machine moves each time can be achieved through centralized coordination of the industrial control system.

[0031] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore should not be construed as limiting the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in their embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novelties disclosed herein.

Claims

1. A cable-suspended ray detection device, characterized in that: The invention comprises two groups of support mechanisms (1) that can be fixed on a workpiece, a load-bearing cable (2) connected between the two groups of support mechanisms (1), and a moving mechanism (3) installed on the load-bearing cable (2), wherein both ends of the load-bearing cable (2) are respectively installed on the corresponding support mechanisms (1) in a manner that they can be lifted or lowered, and the moving mechanism (3) comprises a base plate (7) and a driving motor installed on the base plate (7), wherein the output end of the driving motor is connected to a roller (11), and the roller (11) is in contact with the load-bearing cable (2), and an X-ray machine can be fixed below the base plate (7).

2. A cable-suspended radiation detection device according to claim 1, characterized in that: The support mechanism (1) comprises an upper support body (4) and a lower support body (5), a ball screw (6) is vertically installed between the upper support body (4) and the lower support body (5), the ball screw (6) is driven by a motor, and correspondingly, nuts are respectively installed at both ends of the load-bearing cable (2), and the nuts cooperate with the ball screw (6).

3. A cable-suspended radiation detection device according to claim 2, characterized in that: Two load-bearing cables (2) are connected between the two groups of support mechanisms (1), and correspondingly, two ball screws (6) are arranged side by side between the upper support body (4) and the lower support body (5).

4. A cable-suspended radiation detection device according to claim 2, characterized in that: The upper support body (4) and the lower support body (5) respectively comprise three mutually perpendicular support rods (101), wherein one ends of the three support rods (101) are fixedly connected to each other, and the other ends of the three support rods (101) are connected via an inclined rod (102).

5. A cable-suspended radiation detection device according to claim 4, characterized in that: The upper and lower ends of the ball screw (6) are connected to the upper support body (4) and the lower support body (5) respectively through connecting blocks, and the connecting blocks are embedded in the outer circumference of the support rod (101).

6. The cable-suspended radiation detection device according to claim 1, characterized in that: A connecting rod (12) is also installed on one side of the bottom plate (7) of the moving mechanism (3), and an electromagnet (13) is installed on the end of the connecting rod (12) away from the chassis.

7. The cable-suspended radiation detection device according to claim 1, characterized in that: The driving motor on the bottom plate (7) of the moving mechanism (3) is a double-headed motor (8), and the two output ends of the double-headed motor (8) are respectively connected to rollers (11) via a gear box (9).

8. The cable-suspended radiation detection device according to claim 7, characterized in that: The outer circumferential surface of the roller (11) is concave toward the center of the roller (11).

9. The cable-suspended radiation detection device according to claim 7, characterized in that: An encoder (10) is mounted on the gear box (9).

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