A metal pipe weld detection device

Abstract

The utility model relates to a kind of metal pipeline weld detection devices, rubber ring middle arches outwards into expansion ring, several air holes are arranged on the array of expansion ring, expansion ring outer sealing cover is equipped with gas ring, gas ring and expansion ring are separately provided with air passage, double-layer sealing ring is separately provided with in the air hole both sides of expansion ring, several grids for separating adjacent air holes are arranged between double-layer sealing ring, metal contact is arranged in each grid, several indicator lights are arranged corresponding to each metal contact outside rubber ring;Single metal contact, single indicator light and metal pipeline form loop, and are electrically connected with external power supply by wire;Air passage is communicated with external air extractor by air pipe. Technical personnel can judge whether weld is sealed by observing the bright-out condition of multiple indicator lights, without passing high-pressure gas into metal pipeline, without smearing soap water on metal pipeline, simple operation, without affecting subsequent weld's anticorrosion and rustproof treatment.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, and in particular to a metal pipeline weld inspection device. Background Technology

[0002] Metal pipelines are widely used in numerous industrial and civil sectors, including petroleum, chemical, natural gas, and heating. The sealing performance of their welds directly affects the safety and reliability of the entire pipeline system. Leaks in the welds not only waste resources but can also lead to safety accidents, posing a serious threat to the environment and the safety of people and property. Therefore, accurate and efficient sealing testing of metal pipeline welds is crucial.

[0003] Currently, most commercially available metal pipe weld inspection devices employ traditional methods: high-pressure gas is introduced into the metal pipe while soapy water is applied to the weld seam, and the presence of bubbles is observed to determine if a leak exists. While this method can detect weld sealing issues to some extent, it has several significant drawbacks.

[0004] From an operational convenience perspective, introducing high-pressure gas into a pipeline is quite cumbersome. It requires specialized high-pressure gas source equipment, and ensuring a tight, leak-free connection between the pipeline and the gas source equipment is crucial. This necessitates skilled and experienced operators. Furthermore, during testing, parameters such as gas pressure and introduction time must be strictly controlled; otherwise, the accuracy of the test results may be affected. The entire process is not only time-consuming and labor-intensive but also demands specific environmental conditions, increasing the difficulty and cost of the testing work.

[0005] From the perspective of its impact on metal pipe welds, applying soapy water can negatively affect subsequent painting for corrosion and rust prevention. This is because soapy water is corrosive, and during inspection, it can remain on the weld surface and surrounding area. If not thoroughly removed after inspection, this residual soapy water can chemically react with the subsequently applied anti-corrosion and rust-preventive paint, affecting the paint film's adhesion and anti-corrosion performance, thus reducing the lifespan of the metal pipe. Furthermore, removing residual soapy water is quite troublesome, requiring extensive rinsing with plenty of water and ensuring complete drying; otherwise, the weld area is prone to rusting. Utility Model Content

[0006] The purpose of this invention is to provide a metal pipe weld inspection device to solve the above-mentioned problems existing in the prior art.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0008] A metal pipe weld inspection device includes a rubber ring, an air ring, and indicator lights. The rubber ring arches outward in the middle to form an expansion ring, and several air holes are arrayed on the expansion ring. An air ring is provided on the outer sealing cover of the expansion ring. An air channel is provided between the air ring and the expansion ring. Double-layer sealing rings are arranged on both sides of the air holes inside the expansion ring, and several grids are arranged between the double-layer sealing rings to separate adjacent air holes. A metal contact is provided in each grid. Several indicator lights are provided on the outside of the rubber ring corresponding to each metal contact. A single metal contact, a single indicator light, and a metal pipe form a circuit and are electrically connected to an external power source through a wire. The air channel is connected to an external air pump through an air pipe.

[0009] The beneficial effects of this invention are as follows: if the weld seam inside the grid leaks air, the air inside the metal pipe will enter the grid through the gap in the weld seam, balancing the air pressure inside the grid. This grid will not shrink towards the metal pipe, the metal contacts will not contact the outer wall of the metal pipe, and the corresponding indicator light outside the grid will not light up. Technicians can determine whether the weld seam is sealed by observing the on / off status of multiple indicator lights. There is no need to introduce high-pressure gas into the metal pipe or apply soapy water to the outside of the metal pipe. The operation is simple and will not affect the subsequent anti-corrosion and anti-rust treatment of the weld seam.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, a first connector and a second connector are respectively provided at both ends of the rubber ring, and the first connector and the second connector are stacked alternately.

[0012] Furthermore, the opposite sides of the first connector and the second connector are respectively provided with male and female sides of Velcro.

[0013] The further beneficial effects of adopting the above are: by adjusting the stacking length of the first and second joints, the inner diameter of the rubber ring can be finely adjusted to adapt to welds of different thicknesses, and the rubber ring can be tightly fitted onto the outside of the metal pipe; the first and second joints can be bonded together with Velcro, allowing for multiple bonding and disassembly, making the operation convenient.

[0014] Furthermore, the indicator light is a yellow LED.

[0015] The further beneficial effect of adopting the above is that the yellow light source is eye-catching and easy for technicians to observe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a metal pipe weld inspection device according to the present invention;

[0017] Figure 2 This is a half-sectional schematic diagram of a metal pipe weld inspection device according to the present invention;

[0018] Figure 3This is a cross-sectional view of the joint of a metal pipe weld inspection device according to the present invention;

[0019] Figure 4 This is a partial structural cross-sectional view of a metal pipe weld inspection device according to the present invention;

[0020] Figure 5 This is a schematic diagram illustrating the use of a metal pipe weld inspection device according to this utility model.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. Rubber ring; 11. Expansion ring; 12. Double sealing ring; 13. Grid; 131. Air hole; 14. Metal contact; 15. First connector; 16. Second connector; 2. Air ring; 21. Air passage; 3. Indicator light; 4. Velcro; 5. Air tube; 6. Wire; 7. Metal pipe; 71. Weld. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0024] Example 1

[0025] like Figures 1 to 5 As shown, a metal pipe weld inspection device includes a rubber ring 1, an air ring 2, and indicator lights 3. The rubber ring 1 arches outward in the middle to form an expansion ring 11. Several air holes 131 are arrayed on the expansion ring 11. An air ring 2 is provided as an outer sealing cover for the expansion ring 11. An air passage 21 is provided between the air ring 2 and the expansion ring 11. Double-layer sealing rings 12 are provided on both sides of the air holes 131 inside the expansion ring 11. Several grids 13 are provided between the double-layer sealing rings 12 to separate adjacent air holes 131. A metal contact 14 is provided in each grid 13. Several indicator lights 3 are provided outside the rubber ring 1 corresponding to each metal contact 14. A single metal contact 14 and a single indicator light 3 form a circuit with the metal pipe and are electrically connected to an external power source through a wire 6. The air passage 21 is connected to an external air pump through an air pipe 5.

[0026] The rubber ring 1 is fitted onto the weld 71 of the metal pipe 7. The external air extractor is then activated. Air in each grid 13 is discharged through the vent 131 and converges into the air passage 21, then exits through the air pipe 5. As the air extractor continues to operate, the air pressure inside the grid 13 decreases. Under the pressure of the external atmospheric pressure, the grid 13 contracts towards the metal pipe 7, causing the metal contact 14 to contact the outer wall of the metal pipe 7. The corresponding indicator light 3 outside the grid 13 illuminates, indicating that the weld 71 is leak-free. If the weld 71 inside the grid 13 leaks, the metal pipe 7... Air from the inner wall enters the grid 13 through the gap in weld 71, balancing the air pressure inside the grid 13. This grid 13 will not contract towards the metal pipe 7, and the metal contact 14 will not contact the outer wall of the metal pipe 7. Correspondingly, the indicator light 3 outside the grid 13 will not light up. By observing the on / off status of multiple indicator lights 3, technicians can determine whether weld 71 is sealed. There is no need to introduce high-pressure gas into the metal pipe 7 or apply soapy water to the outside of the metal pipe 7. The operation is simple and will not affect the subsequent anti-corrosion and anti-rust treatment of weld 71.

[0027] Example 2

[0028] like Figure 1 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0029] The grid 13 is made of rubber, and each grid 13 is connected to the metal pipe 7 and the weld seal 71. Each grid 13, the metal pipe 7, and the weld 71 form a sealed cavity.

[0030] The rubber ring 1 has a first connector 15 and a second connector 16 at both ends, which are staggered. By adjusting the stacking length of the first connector 15 and the second connector 16, the inner diameter of the rubber ring 1 can be finely adjusted to fit welds 71 ​​of different thicknesses, and the rubber ring 1 can be tightly fitted onto the outside of the metal pipe 7.

[0031] The opposite sides of the first connector 15 and the second connector 16 are respectively provided with male and female sides of the Velcro 4. The first connector 15 and the second connector are glued together by the Velcro 4, which can be glued and disassembled multiple times, making the operation convenient.

[0032] Example 3

[0033] like Figure 2 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0034] Indicator light 3 is a yellow LED. The yellow light source is eye-catching and easy for technicians to observe.

[0035] Both the rubber ring 1 and the air ring 2 are made of rubber. Rubber has high elasticity and a long service life.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metal pipe weld inspection device, characterized in that, The system includes a rubber ring (1), an air ring (2), and an indicator light (3). The rubber ring (1) is arched outward in the middle to form an expansion ring (11). Several air holes (131) are arranged in an array on the expansion ring (11). The air ring (2) is provided as an outer sealing cover for the expansion ring (11). An air passage (21) is provided between the air ring (2) and the expansion ring (11). Double-layer sealing rings (12) are provided on both sides of the air holes (131) inside the expansion ring (11). A number of grids (13) are provided between the sealing rings (12) to separate adjacent air holes (131). Each grid (13) is provided with a metal contact (14). A number of indicator lights (3) are provided outside the rubber ring (1) corresponding to each metal contact (14). A single metal contact (14) and a single indicator light (3) form a circuit with the metal pipe and are electrically connected to an external power source through a wire (6). The air passage (21) is connected to an external air pump through an air pipe (5).

2. The metal pipe weld inspection device according to claim 1, characterized in that, The grid (13) is made of rubber, and each grid (13) is connected to the metal pipe (7) and the weld seal (71).

3. The metal pipe weld inspection device according to claim 1, characterized in that, The rubber ring (1) is provided with a first connector (15) and a second connector (16) at both ends, and the first connector (15) and the second connector (16) are stacked alternately.

4. The metal pipe weld inspection device according to claim 3, characterized in that, The opposite sides of the first connector (15) and the second connector (16) are respectively provided with male and female sides of Velcro (4).

5. The metal pipe weld inspection device according to claim 1, characterized in that, The indicator light (3) is a yellow LED light.

6. The metal pipe weld inspection device according to any one of claims 1 to 5, characterized in that, Both the rubber ring (1) and the air ring (2) are made of rubber.

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