A device for detecting leakage of a heat supply steam pipeline inner tube

Abstract

The utility model discloses a kind of heat supply steam pipeline inner tube leakage leak detection device, comprising: outer fixed component, cable, camera and auxiliary assembly, cable one end passes through outer fixed component and is connected with camera, and cable and outer fixed component gap fit, auxiliary assembly detachably connected with the one end of cable with camera, camera is equipped with the display screen connected with its signal;The utility model combines the mode that area table installation bill and direct observation method are combined, by outer fixed component reaches the plugging pipeline while, towards the camera of pipeline exploration, directly observe inner tube wall by camera, while in order to reduce the difficulty of direct observation, cotton thread is set in the front end of camera by auxiliary assembly, the position of leakage point is quickly and simply positioned by the characteristics that cotton thread is in leakage point airflow fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of steam pipeline maintenance technology, and in particular to a leak detection device for the inner pipe of a heating steam pipeline. Background Technology

[0002] In urban construction, a large number of steam heating pipelines need to be laid underground. The steel-jacketed insulated pipe of the steam heating network is composed of an outer protective steel pipe, a steel pipe anti-corrosion layer, a polyurethane foam insulation layer, and an inner working steel pipe. Due to the double-layer pipe design, leaks can occur anywhere in the inner and outer pipes. Existing detection methods usually require digging out the steam pipe, installing pressure gauges at both ends of the pipe, and filling the pipe with air. The leak is located by observing the location of the leak on the outer protective steel pipe. However, the specific locations of leaks inside and outside the heating pipeline are often inconsistent. In addition, most steam pipelines are buried under green belts. The traditional method of locating leaks in the inner pipe is not only time-consuming but also damages a large area of ​​greenery, increasing construction costs. With the advancement of technology, some maintenance personnel also use endoscopes to find leaks in the inner pipe. However, simply using an endoscope to find leaks still has the problem of finding leaks that are difficult to observe.

[0003] In view of this, there is an urgent need for a leak detection device for the inner pipe of a heating steam pipeline to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a leak detection device for the inner pipe of a heating steam pipeline that solves the above-mentioned problems.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a leak detection device for the inner pipe of a heating steam pipeline, comprising:

[0006] The device includes an external fixing component, a cable, a camera, and an auxiliary component. One end of the cable passes through the external fixing component and connects to the camera. The cable and the external fixing component are fitted with a clearance. The auxiliary component is detachably connected to the end of the cable where the camera is located. The camera has a display screen that is connected to its signal.

[0007] Preferably, the external fixing assembly includes a threaded cylinder, a hollow tube, a first annular plate, a flange, and a second annular plate. The hollow tube is bearing-connected to the side wall of the outer sleeve. The first annular plate is fixedly connected to the threaded cylinder. The second annular plate is threadedly connected to the threaded cylinder. The flange is located between the first annular plate and the second annular plate.

[0008] Preferably, the cable passes through the hollow tube and is fitted with a gap therebetween.

[0009] Preferably, the curved sidewall of the threaded cylinder is provided with an annular rubber bladder and an inflation tube fixedly connected to the end of the hollow tube. One end of the inflation tube is fixedly connected to the annular rubber bladder, and the other end passes through the planar sidewall of the threaded cylinder and is fixedly connected to it.

[0010] Preferably, the auxiliary components include a fixing ring, two connecting plates, and a cotton thread. The fixing ring is detachably connected to the end of the cable near the camera. One end of each of the two connecting plates is fixedly connected to the side wall of the fixing ring, and the cotton thread is fixedly connected to the end of the connecting plates away from the fixing ring.

[0011] Preferably, the side wall of the fixed ring is provided with a concave screw hole, and the concave screw hole is provided with a matching concave bolt.

[0012] Preferably, the length of the cotton thread is greater than the diameter of the fixed ring.

[0013] Preferably, the connecting plate has a circular seat fixedly connected to the end away from the fixed ring, the circular seat has an axially arranged shaft, and the shaft has a lightweight impeller rotatably connected to it.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model combines the regional metering method and the direct observation method. While sealing the pipe through the external fixing component, a camera is inserted into the pipe to directly observe the inner pipe wall. At the same time, in order to reduce the difficulty of direct observation, a cotton thread is set at the front end of the camera through the auxiliary component. By observing the airflow fluctuation characteristics at the leak point through the cotton thread, the location of the leak point can be quickly and easily located. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a leak detection device for the inner pipe of a heating steam pipeline;

[0017] Figure 2 This is a schematic diagram of the dispersed structure of the external fixing component in an embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the auxiliary component in an embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the auxiliary component in Embodiment 2 of the utility model.

[0020] In the diagram: 1. External fixing component; 10. Threaded cylinder; 11. Hollow tube; 12. First annular plate; 13. Flange; 14. Second annular plate; 15. Annular rubber bladder; 16. Inflation tube; 2. Cable; 3. Camera; 4. Auxiliary component; 40. Fixing ring; 400. Concave screw hole; 401. Concave bolt; 41. Connecting plate; 42. Cotton thread; 43. Circular seat; 430. Shaft; 431. Lightweight impeller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see the appendix Figure 1-3 A leak detection device for the inner pipe of a heating steam pipeline, comprising:

[0023] The device includes an external fixing component 1, a cable 2, a camera 3, and an auxiliary component 4. One end of the cable 2 passes through the external fixing component 1 and is connected to the camera 3. The cable 2 and the external fixing component 1 are in clearance fit. The auxiliary component 4 is detachably connected to the end of the cable 2 where the camera 3 is located. The camera 3 is equipped with a display screen that is connected to its signal.

[0024] In actual use, the external fixing component 1 can seal one end of the pipe while ensuring that the cable 2 can pass through the external fixing component 1 and the camera 3 can be inserted into the pipe through the cable 2. At the same time, in order to facilitate the inspection personnel to check for leaks, an auxiliary component 4 is also set up to achieve the purpose of assistance.

[0025] Specifically, the external fixing assembly 1 includes a threaded cylinder 10, a hollow tube 11, a first annular plate 12, a flange 13, and a second annular plate 14. The hollow tube 11 is bearing-connected to the planar side wall of the outer sleeve 10. The first annular plate 12 is fixedly connected to the threaded cylinder 10. The second annular plate 14 is threadedly connected to the threaded cylinder 10. The flange 13 is located between the first annular plate 12 and the second annular plate 14.

[0026] Specifically, the cable 2 passes through the hollow tube 11 and is fitted with it with a gap;

[0027] Considering the numerous specifications of heating pipes, an external fixing component 1 that can adapt to various specifications is needed. In this utility model, a first annular plate 12 and a second annular plate 14 are provided on the outside of the threaded cylinder 10 to clamp the flange 13. The external fixing component 1 is fixed by the cooperation between the flange 13 and the flange on the pipe. At the same time, considering that the cable 2 needs to pass through the external fixing component 1 and enter the pipe, a hollow tube 11 is provided to position the cable 2.

[0028] Specifically, the curved sidewall of the threaded cylinder 10 is provided with an annular rubber bladder 15 and an inflation tube 16 fixedly connected to the hollow tube 11 at one end. One end of the inflation tube 16 is fixedly connected to the annular rubber bladder 15, and the other end passes through the planar sidewall of the threaded cylinder 10 and is fixedly connected to it.

[0029] Considering that gas flow is needed to assist in leak detection, the sealing of both ends of the pipeline is particularly important. Therefore, an annular rubber bladder 15 for sealing is set on the curved side wall of the threaded cylinder 10, and it is inflated through the inflation pipe 16. It should be noted that the inflation pipe 16 should be equipped with a matching one-way valve or plug.

[0030] Specifically, the auxiliary component 4 includes a fixing ring 40, two connecting plates 41, and a cotton thread 42. The fixing ring 40 is detachably connected to the end of the cable 2 near the camera 3. One end of each of the two connecting plates 41 is fixedly connected to the side wall of the fixing ring 40. The cotton thread 42 is fixedly connected to the end of the connecting plate 41 away from the fixing ring 40.

[0031] Considering that checking for leaks by visually inspecting the display screen may require inspectors to observe the screen several times, which is time-consuming and laborious, an auxiliary component 4 was introduced. The cotton thread 42 is fixed to the front end of the camera 3 by the auxiliary component 4, and the leak can be confirmed by observing the cotton thread 42 during the leak inspection process.

[0032] Specifically, the fixed ring 40 has a recessed screw hole 400 on its side wall, and the recessed screw hole 400 is provided with a matching recessed bolt 401;

[0033] To secure the auxiliary component 4, recessed screw holes 400 and recessed bolts 401 are provided on the fixing ring 40, thereby achieving the purpose of fixation.

[0034] Specifically, the length of the cotton thread 42 is greater than the diameter of the fixed ring 40; considering that in the method of checking for leaks by using the cotton thread 42, if the cotton thread is in a taut state, it will be difficult for the gas flow at the leak point to blow the cotton thread 42, the cotton thread 42 must be in a slack state.

[0035] Example 2

[0036] Please see Figure 4

[0037] Specifically, the connecting plate 41 has a circular seat 43 fixedly connected to the end away from the fixed ring 40. The circular seat 43 has an axially arranged shaft 430, and the shaft 430 has a lightweight impeller 431 rotatably connected to it.

[0038] Considering that the movement of the cotton thread 42 itself may be overlooked by the inspectors when using the method of leak detection, the cotton thread 42 is replaced with a lightweight impeller 431 based on the first embodiment. The rotation of the lightweight impeller 431 is driven by the flow of gas, thereby achieving the purpose of leak detection. It should be noted that the lightweight impeller 431 itself has a high weight requirement and needs to be made of plastic or paper.

[0039] The implementation principle of a waste heat utilization buffer temperature regulation reverse osmosis water purification device according to this application is as follows:

[0040] During the use of the equipment, the cable 2 is passed through the hollow tube 11 and connected to the camera 3. Then, the concave bolt 401 on the concave screw hole 400 is loosened, the fixing ring 40 is put on the end of the cable 2 where the camera 3 is located, and the concave bolt 401 is tightened to fix it. Then, the second annular plate 14 is removed, and a suitable flange 13 is selected according to the size of the flange on the heating pipe. After the flange 13 is put on the threaded cylinder 10, the second annular plate 14 is installed. The flange 13 is fixed by the second annular plate 14 and the first annular plate 12. Then, the flange 13 is fixed to the flange of the heating pipe by the screw and nut. Finally, the annular rubber bladder 15 is completely sealed to one end of the heating pipe by the air inflator 16. Then, the other end of the heating pipe is pressurized by the pressure testing equipment. After the pressure reaches a certain value, the preparation work is completed.

[0041] Then, the camera 3 is slowly inserted into the heating pipe via cable 2. When the auxiliary component 4 moves to the leak point, the airflow will move towards the leak point due to the pressure difference between the inside and outside of the leak point. The flowing airflow blows the cotton thread 42 or the lightweight impeller 431. The swaying of the cotton thread 42 or the rotation of the lightweight impeller 431 can be observed on the display screen. Then, the inspectors can focus on observing this area to find the leak point. This leak detection method not only facilitates the leak detection of the inspectors and reduces their workload, but also greatly reduces the frequency of missed leaks.

[0042] 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.

Claims

1. A leak detection device for the inner pipe of a heating steam pipeline, characterized in that, include: The external fixing component (1), cable (2), camera (3) and auxiliary component (4) are provided. One end of the cable (2) passes through the external fixing component (1) and is connected to the camera (3). The cable (2) and the external fixing component (1) are fitted with a clearance. The auxiliary component (4) is detachably connected to the end of the cable (2) where the camera (3) is located. The camera (3) is equipped with a display screen connected to its signal.

2. The leak detection device for the inner pipe of a heating steam pipeline according to claim 1, characterized in that: The external fixing assembly (1) includes a threaded cylinder (10), a hollow tube (11), a first annular plate (12), a flange (13), and a second annular plate (14). The hollow tube (11) is bearing-connected to the planar side wall of the threaded cylinder (10). The first annular plate (12) is fixedly connected to the threaded cylinder (10). The second annular plate (14) is threadedly connected to the threaded cylinder (10). The flange (13) is located between the first annular plate (12) and the second annular plate (14).

3. A leak detection device for the inner pipe of a heating steam pipeline according to claim 2, characterized in that: The cable (2) passes through the hollow tube (11) and is fitted with it with a gap.

4. A leak detection device for the inner pipe of a heating steam pipeline according to claim 2, characterized in that: The threaded cylinder (10) has an annular rubber bladder (15) and an inflation tube (16) fixedly connected to the curved side wall away from the hollow tube (11). One end of the inflation tube (16) is fixedly connected to the annular rubber bladder (15), and the other end passes through the planar side wall of the threaded cylinder (10) and is fixedly connected to it.

5. A leak detection device for the inner pipe of a heating steam pipeline according to claim 1, characterized in that: The auxiliary component (4) includes a fixed ring (40), two connecting plates (41) and a cotton thread (42). The fixed ring (40) is detachably connected to the end of the cable (2) near the camera (3). One end of each of the two connecting plates (41) is fixedly connected to the side wall of the fixed ring (40). The cotton thread (42) is fixedly connected to the end of the connecting plate (41) away from the fixed ring (40).

6. A leak detection device for the inner pipe of a heating steam pipeline according to claim 5, characterized in that: The fixed ring (40) has a recessed screw hole (400) on its side wall, and the recessed screw hole (400) is provided with a matching recessed bolt (401).

7. A leak detection device for the inner pipe of a heating steam pipeline according to claim 5, characterized in that: The length of the cotton thread (42) is greater than the diameter of the fixed ring (40).

8. A leak detection device for the inner pipe of a heating steam pipeline according to claim 5, characterized in that: The connecting plate (41) has a circular seat (43) fixedly connected to the end away from the fixed ring (40). The circular seat (43) has an axially arranged shaft (430), and the shaft (430) has a lightweight impeller (431) rotatably connected to it.

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