A weld detection device for atmospheric pressure storage tanks

Abstract

The utility model relates to the technical field of ultrasonic detection, and specifically discloses a weld detection device for a normal pressure storage tank, comprising a storage tank, wherein a detection mechanism for detecting welds is arranged in the storage tank, and a support mechanism for fixing the detection mechanism is arranged on the inner wall of the storage tank; a telescopic rod is arranged on the detection mechanism, and the other end of the telescopic rod is fixedly connected to a fixed block and a second fixed column, and a hydraulic rotating cylinder is arranged on the second fixed column, and the other end of the hydraulic rotating cylinder is fixedly connected to the support mechanism; the technical problem that the tank body of the storage tank is in an arc shape, air is easily present between an ultrasonic probe and the weld, and the accuracy of the weld detection result is reduced is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic detection, and specifically discloses a welding seam detection device for a normal pressure storage tank. Background Art

[0002] The tank trough is used to store liquids, and larger storage tanks are usually welded from multiple groups of iron sheets. After the tank is welded, the staff needs to inspect the welds of the tank. If there are defects in the welds, re-welding is required to ensure that there are no cracks or defects in the welds, and that the tank will not leak during subsequent use. Ultrasonic testing is one of the non-destructive testing methods. Ultrasonic testing requires the application of coupling agent between the ultrasonic probe and the weld to ensure the accuracy of the test results, and to accurately detect the actual condition of the weld.

[0003] For example, the utility model patent with patent number 2020201731823 discloses an ultrasonic detection device for steel structure weld detection, including an ultrasonic weld detector and an ultrasonic detection probe. The front surface of the ultrasonic weld detector is provided with a display screen and control buttons, and the display screen is located above the control buttons. The top center position of the ultrasonic weld detector is spirally connected with a data connection line through a spiral connection; when the existing weld detection device detects the storage tank, due to the arc-shaped tank body of the storage tank, the coupling agent will flow out between the ultrasonic probe and the weld, and it cannot be ensured that the ultrasonic wave can be effectively transmitted into the weld, thereby the accuracy of the weld detection result cannot be guaranteed. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a weld detection device for atmospheric pressure storage tanks to solve the technical problem that the tank body of the storage tank is curved, and air is easily present between the ultrasonic probe and the weld, resulting in reduced accuracy of the weld detection results.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] A weld detection device for a normal pressure storage tank includes a storage tank, a detection mechanism for detecting welds is arranged inside the storage tank, a support mechanism for fixing the detection mechanism is arranged on the inner wall of the storage tank; a telescopic rod is arranged on the detection mechanism, the other end of the telescopic rod is fixedly connected to a fixed block and a second fixed column, a hydraulic rotary cylinder is arranged on the second fixed column, and the other end of the hydraulic rotary cylinder is fixedly connected to the support mechanism. The detection mechanism is fixed at the center of the storage tank by the support mechanism, which is convenient for the detection mechanism to check the welds, and the detection mechanism can add coupling agent to discharge the air between the ultrasonic probe and the weld to ensure the accuracy of the detection result.

[0007] Furthermore, the detection mechanism includes a connecting block, the connecting block is fixedly connected to the telescopic rod, the connecting block is provided with a matching column, the matching column is mounted with an elastic block, and the connecting block is in contact with the elastic block; fixed rods are provided on both sides of the elastic block, and balls are slidably mounted on the two groups of the fixed rods, and the balls are in contact with the inner wall of the storage tank, and a fixing plate is fixedly connected between the two groups of the fixed rods, and both sides of the fixing plate are in contact with the elastic block; an ultrasonic probe is mounted on the fixed block, and the ultrasonic probe is connected to the ultrasonic processing device. Through the coordination between the elastic block and the fixed rod, the shape of the elastic block can be changed through the telescopic rod to adapt to storage tanks of different sizes. While ensuring that the ultrasonic probe can always be moved to a suitable position, the ultrasonic probe will not be damaged. While ensuring the accuracy of the detection results, the applicability of the detection device is improved.

[0008] Furthermore, the elastic block is composed of two groups of rectangular blocks and one group of arc blocks, and the two groups of rectangular blocks are respectively located at both ends of the arc block; the fixed block contacts the two groups of rectangular blocks, and the connecting block contacts the connection between the elastic block and the rectangular block. The connecting block can change the shape of the arc block by moving the two groups of rectangular blocks, so as to achieve the purpose of fitting the inner wall of storage tanks of different sizes, thereby improving the applicability of the detection mechanism.

[0009] Furthermore, both ends of the elastic block are provided with a first rubber block, and both ends of the elastic block are provided with a second rubber block. Two groups of the second rubber blocks are respectively tightly fitted with both sides of the fixing plate, and the two groups of the first rubber blocks, the two groups of the second rubber blocks and the fixing plate form a sealed cavity; the two groups of the first rubber blocks and the two groups of the second rubber blocks are tightly fitted with the inner wall of the storage tank. The elastic block, the first rubber block and the second rubber block are all plastic, so that the sealed cavity can form a sealed space with the inner wall of any storage tank, thereby providing a space for the coupling agent, ensuring that when the ultrasonic probe detects the weld, no weld will appear between the ultrasonic probe and the weld, thereby ensuring the accuracy of the detection result.

[0010] Furthermore, a liquid inlet pipe is provided in the sealed cavity, the liquid inlet pipe is connected to the sealed cavity, a vent hole is provided at the top of the sealed cavity, a suction device is provided on the liquid inlet pipe, and the suction device is located in the coupling agent. The coupling agent is moved into the sealed cavity by the suction device to ensure the accuracy of the detection result.

[0011] Furthermore, the support mechanism includes a central block, on which three groups of hydraulic cylinders are arranged, the other ends of the three groups of hydraulic cylinders are fixedly connected to the support block, and rubber columns are arranged at both ends of the support block; several groups of rubber columns are in contact with the inner wall of the storage tank.

[0012] Furthermore, the central block includes a triangular prism and a first fixed column; the hydraulic rotary cylinder is fixedly connected to the first fixed column; and three groups of hydraulic cylinders are respectively fixedly connected to three sides of the triangular prism. The detection mechanism is fixed at the center of the storage tank through the three groups of hydraulic cylinders, so that the detection device can detect the weld in the storage tank.

[0013] The working principle and beneficial effects of this solution are:

[0014] The staff first moves the detection device to the specified position in the storage tank, and then fixes the detection mechanism in the storage tank through the supporting mechanism. At this time, the center block is located at the center of the storage tank. Then the staff starts the telescopic rod and moves the detection mechanism to the weld to detect the weld. After the inspection is completed, the staff first retracts the telescopic rod, and then starts the hydraulic rotary cylinder to move the detection mechanism to the next inspection point and then stops. Then, the telescopic rod is started to inspect the weld. This reciprocating process is used to inspect the welds in the storage tank. Since the detection mechanism can fit the inner wall of storage tanks of different sizes, and at the same time ensures that the ultrasonic probe and the weld are always filled with coupling agent and no air is present, the accuracy of the detection results is guaranteed while the scope of application of the detection device is improved.

[0015] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment;

[0017] Figure 2 An exploded view of an embodiment;

[0018] Figure 3 It is a structural schematic diagram of the detection mechanism in the embodiment;

[0019] Figure 4 It is a side view of the detection mechanism in the embodiment.

[0020] The markings in the accompanying drawings are as follows: storage tank 1, center block 2, triangular prism 3, first fixed column 4, hydraulic cylinder 5, support block 6, rubber column 7, prism body 8, hydraulic rotating cylinder 9, second fixed column 10, fixed block 11, telescopic rod 12, connecting block 13, matching column 14, elastic block 15, first rubber block 16, fixed rod 17, ball 18, fixed plate 19, ultrasonic probe 20, second rubber block 21, sealing chamber 22, and liquid inlet pipe 23. DETAILED DESCRIPTION

[0021] The following is further described in detail through specific implementation methods:

[0022] Example

[0023] like Figures 1 to 4 As shown, a weld detection device for a normal pressure storage tank 1 is disclosed, including a storage tank 1, wherein a detection mechanism for detecting welds is arranged in the storage tank 1, wherein the detection mechanism comprises a connecting block 13, wherein the connecting block 13 is U-shaped and has strong rigidity, wherein a matching column 14 is arranged on the connecting block 13, wherein an elastic block 15 is mounted on the matching column 14, wherein the matching column 14 is a polygonal column, wherein the elastic block 15 cannot rotate around the matching column 14, and wherein the elastic block 15 comprises a group of arc blocks and two groups of rectangular blocks, wherein the two groups of rectangular blocks are respectively located at At both ends of the arc block, the arc block is elastic, the opening direction of the arc block is toward the center of the storage tank 1, the two ends of the connecting block 13 are aligned with the two groups of rectangular blocks respectively, the connecting block 13 is in contact with the elastic block 15, the matching column 14 is located at the center of the elastic block 15, the first rubber block 16 is arranged at both ends of the elastic block 15, the two groups of first rubber blocks 16 are in contact with the inner wall of the storage tank 1, and the two sides of the elastic block 15 are provided with a fixing rod 17, one end of the fixing rod 17 is fixedly connected to the arc block, and the fixing rod 17 is located at the arc block At the center, the fixing rod 17 is horizontally aligned with the matching column 14, and the other ends of the two sets of fixing rods 17 are slidably mounted with balls 18, and the balls 18 are in contact with the inner wall of the storage tank 1. A fixing plate 19 is arranged between the two sets of fixing rods 17, and the two sides of the fixing plate 19 are tightly fitted with the two sets of rectangular blocks respectively. An ultrasonic probe 20 is mounted inside the fixing plate 19, and an ultrasonic processing device is connected to the ultrasonic probe 20, and the ultrasonic probe 20 is in contact with the inner wall of the storage tank 1. A second rubber block is arranged on both sides of the elastic block 15. 21, the two ends of the second rubber block 21 are fixedly connected to the two groups of rectangular blocks respectively, one end of the second rubber block 21 is arc-shaped, one side of the second rubber block 21 is in contact with the inner wall of the storage tank 1, the two groups of second rubber blocks 21, the elastic block 15 and the fixing plate 19 form a sealed cavity 22, and a liquid inlet pipe 23 is provided on the sealed cavity 22, one end of the liquid inlet pipe 23 is connected to the sealed cavity 22, and a suction device is provided at the other end of the liquid inlet pipe 23, and the suction device is located in the coupling agent, and a vent hole is opened at the top of the sealed cavity, such as Figure 3 and Figure 4 shown.

[0024] A support mechanism is provided in the storage tank 1, and the support mechanism includes a central block 2, and the central block 2 is located at the center of the storage tank 1. The central block 2 includes a triangular prism 3 and a first fixed column 4, and the first fixed column 4 is fixedly connected to the triangular prism 3. Hydraulic cylinders 5 are provided on the three sides of the triangular prism 3, and the fixed end of the hydraulic cylinder 5 is fixedly connected to the triangular prism 3 by bolts. A support block 6 is provided at the telescopic end of the hydraulic cylinder 5, and both sides of the support block 6 are arc-shaped, and the cross-section of the support block 6 is an axisymmetric figure. Prisms 8 are provided at both ends of the support block 6, and rubber columns 7 are sleeved in the prism 8, and the rubber columns 7 are in contact with the inner wall of the storage tank 1; Figure 2 As shown;

[0025] A hydraulic rotary cylinder 9 is provided on the first fixed column 4, and the hydraulic rotary cylinder 9 is fixedly connected to the first fixed column 4 by bolts. The other end of the hydraulic rotary cylinder 9 is fixedly connected to a second fixed column 10, and a fixed block 11 is provided on the second fixed column 10. The fixed block 11 is provided with a telescopic rod 12, and the fixed end of the telescopic rod 12 is fixedly connected to the fixed block 11 by bolts, and the telescopic end of the telescopic rod 12 is fixedly connected to the connecting block 13. Figure 2 shown.

[0026] The ultrasonic processing device can receive the signal sent by the ultrasonic probe 20 and perform calculations, and present the actual situation at the weld in the form of a waveform diagram in front of the staff, so that the staff can intuitively judge whether there are defects in the weld. Among them, the hydraulic rotating cylinder 9, ultrasonic probe 20, ultrasonic processing device and suction device are all technical means commonly used by technical personnel in this field, and their structures, connection methods and usage methods are all well known to technical personnel in this field.

[0027] When implementing

[0028] When in use, the staff first moves the detection device to the designated position of the storage tank 1, and then places one group of hydraulic cylinders 5 vertically on the ground, so that the two groups of rubber columns 7 are in contact with the inner wall of the storage tank 1, so that the staff can support the detection mechanism through the supporting mechanism, and then start the three groups of hydraulic cylinders 5 at the same time, and the telescopic ends of the three groups of hydraulic cylinders 5 are extended, and the telescopic ends of two groups of hydraulic cylinders 5 drive the support blocks to move, and the rubber columns 7 on the fixed ends of the other group of hydraulic cylinders 5 are in contact with the inner wall of the storage tank 1, so the telescopic ends of the hydraulic cylinders 5 drive the detection mechanism and the remaining two groups of hydraulic cylinders 5 to move upward, until the telescopic ends of the remaining two groups of hydraulic cylinders 5 drive the corresponding two groups of rubber columns 7 to contact the inner wall of the storage tank 1, and at this time the center block 2 is located at the center of the storage tank 1, and then the staff starts the telescopic rod 12 to move the detection mechanism to the weld to detect the weld. Then the staff hydraulically rotates the cylinder to drive the second fixed column 10, the fixed block 11 and the telescopic rod 12 to rotate until the detection mechanism moves to the next detection point and stops, and then the weld is detected again. The detection mechanism moves along the inner wall in the storage tank 1, and the detection mechanism detects the weld in the storage tank 1. Due to the unique shape of the support block and the support mechanism, the detection device can be fixed in storage tanks 1 of different sizes, and the telescopic cylinder can cooperate with it to detect storage tanks 1 of different sizes, thereby improving the application range of the detection device.

[0029] When the staff uses the detection mechanism to detect the storage tank 1, the staff first drives the connecting block 13 to move through the telescopic rod 12, and the connecting block 13 drives the elastic block to move through the matching column 14, and the elastic block drives the two groups of first rubber blocks 16, the fixing rod 17, the ball 18, the fixing plate 19 and the ultrasonic probe 20 to move until the ball 18 first contacts the inner wall of the storage tank 1. At this time, the ultrasonic detector moves to a position where the weld can be detected, and then the telescopic rod 12 continues to extend, and drives the rectangular block to move through the connecting block 13, drives the arc block to deform, and the arc surface of the arc block becomes closer and closer to the plane. The rectangular block drives the first rubber block 16 to move until the first rubber block 16 contacts the inner wall of the storage tank 1, and at the same time drives the two groups of second rubber blocks 21 to move. When the second rubber block 21 contacts the inner wall of the storage tank 1, the rectangular block Continue to move, so that the second rubber block 21 is slightly deformed until the rectangular block stops moving. When the rectangular block moves, the fixed plate 19 slides on the rectangular block. At this time, one side of the rubber block is completely in contact with the inner wall of the storage tank 1. At this time, the sealed cavity 22 and the inner wall of the storage tank 1 form a sealed space. The staff sucks the coupling agent into the sealed cavity 22 through the suction device. The air in the sealed cavity 22 can be discharged from the sealed cavity 22 through the vent hole, and then the ultrasonic probe 20 is started. The ultrasonic probe 20 inspects the weld and feeds the signal back to the ultrasonic processing device. The ultrasonic processing device performs calculations and displays the condition of the weld in the form of a line graph. The staff can intuitively see whether there are defects in the weld; at the same time, it can ensure that there is no air between the ultrasonic probe 20 and the weld, thereby ensuring the accuracy of the detection result.

[0030] When one point of the weld is inspected, the telescopic rod 12 is controlled to retract so that the sealed cavity 22 is connected to the outside. There is air in the sealed cavity 22, and the coupling agent will flow into the storage cavity. Then, the inspection mechanism is moved by rotating the hydraulic cylinder 5, and the telescopic rod 12 is started again to move the inspection device to the specified position to inspect the weld.

[0031] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the utility model.

Claims

1. A weld detection device for atmospheric pressure storage tanks, characterized in that: It comprises a storage tank, wherein a detection mechanism for detecting welds is arranged in the storage tank, and a support mechanism for fixing the detection mechanism is arranged on the inner wall of the storage tank; The detection mechanism is provided with a telescopic rod, the other end of which is fixedly connected to a fixed block and a second fixed column. The second fixed column is provided with a hydraulic rotating cylinder, the other end of which is fixedly connected to a supporting mechanism.

2. The weld detection device for atmospheric pressure storage tank according to claim 1, characterized in that: The detection mechanism comprises a connecting block, the connecting block is fixedly connected to the telescopic rod, a matching column is arranged on the connecting block, an elastic block is sleeved on the matching column, and the connecting block contacts the elastic block; Fixed rods are provided on both sides of the elastic block, and balls are slidably mounted on the two groups of fixed rods, and the balls are in contact with the inner wall of the storage tank. A fixed plate is fixedly connected between the two groups of fixed rods, and both sides of the fixed plate are in contact with the elastic block; An ultrasonic probe is mounted on the fixed block, and the ultrasonic probe is connected to the ultrasonic processing device.

3. The weld detection device for atmospheric pressure storage tank according to claim 2 is characterized in that: The elastic block is composed of two groups of rectangular blocks and one group of arc blocks, and the two groups of rectangular blocks are respectively located at two ends of the arc block; The fixing block contacts the two groups of rectangular blocks, and the connecting block contacts the connection between the elastic block and the rectangular block.

4. The weld detection device for atmospheric pressure storage tank according to claim 3 is characterized in that: Both ends of the elastic block are provided with a first rubber block, and both ends of the elastic block are provided with a second rubber block, and two groups of the second rubber blocks are tightly fitted to both sides of the fixing plate respectively, and the two groups of the first rubber blocks, the two groups of the second rubber blocks and the fixing plate form a sealed cavity; The two groups of the first rubber blocks and the two groups of the second rubber blocks are both tightly fitted to the inner wall of the storage tank.

5. The weld detection device for atmospheric pressure storage tank according to claim 4 is characterized in that: A liquid inlet pipe is arranged in the sealed cavity, the liquid inlet pipe is communicated with the sealed cavity, and a vent hole is opened at the top of the sealed cavity; The liquid inlet pipe is provided with a suction device, and the suction device is located in the coupling agent.

6. The weld detection device for atmospheric pressure storage tank according to claim 5, characterized in that: The support mechanism comprises a central block, on which three groups of hydraulic cylinders are arranged, the other ends of the three groups of hydraulic cylinders are fixedly connected to the support block, and both ends of the support block are arranged with rubber columns; Several groups of the rubber columns are in contact with the inner wall of the storage tank.

7. The weld detection device for atmospheric pressure storage tank according to claim 6 is characterized in that: The central block includes a triangular prism and a first fixed column; The hydraulic rotary cylinder is fixedly connected to the first fixed column; The three groups of hydraulic cylinders are respectively fixedly connected to the three side surfaces of the triangular prism.

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