Natural gas pipeline leakage detection device

Abstract

The utility model relates to the related technical field of pipeline detection, and particularly discloses a natural gas pipeline leakage detection device which comprises a power section, a detection section and a positioning section are sequentially arranged behind the power section, the power section is connected with the detection section through a universal connector, and the detection section is connected with the positioning section through a universal connector. A universal connector is arranged on the positioning joint, a fixing table is arranged at the other end of the universal connector, and a plurality of sets of walking mechanisms used for keeping stable are arranged on the fixing table. The detection section comprises a fixed column, universal connectors are fixedly connected to the two ends of the fixed column, and the fixed column is provided with a magnetization mechanism used for magnetizing the natural gas pipeline and a plurality of sets of sensor mechanisms used for detecting whether the natural gas pipeline has a magnetic leakage phenomenon or not; the technical problem that an existing detection device cannot detect natural gas pipelines with different diameters, so that the applicability of the detection device is not high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field related to pipeline detection, and specifically discloses a natural gas pipeline leakage detection device. Background Art

[0002] With the development of the times, natural gas has gradually been integrated into our lives. Since natural gas has certain dangers, natural gas pipelines need to be inspected regularly to avoid accidents such as natural gas leaks. Most natural gas pipelines are buried underground, and a small part is exposed. Natural gas pipeline detection usually uses a magnetic leakage detection device. The pipeline is saturated with permanent magnets. When there are defects in the pipe wall, the magnetic lines of force will deform and produce leakage. By sensing whether there is leakage in the natural gas pipeline, it can be judged whether there are defects in the natural gas pipeline; the magnetic leakage detection device blocks the natural gas pipeline with a rubber bowl, and then drives the magnetic leakage detection device to move through the pressure difference.

[0003] For example, the utility model with patent number CN2016200848458 discloses a natural gas pipeline magnetic leakage corrosion detection device, including a carrier, wherein the carrier includes two sections, the shell of the first section is an iron core, and the outer periphery of the shell is fixed with a first supporting leather wrist, a first steel brush, a probe ring structure, a second steel brush, and a second supporting leather wrist in sequence; the shell of the second section is a pressure-resistant cabin, and the outer periphery of the pressure-resistant cabin is fixed with a front driving leather wrist, a first supporting wheel, and a second supporting wheel in sequence; the first section and the second section are connected by a universal joint. When the existing detection device detects the natural gas pipeline, it can only detect the natural gas pipeline with a fixed diameter, and cannot detect the natural gas pipeline with different diameters, thereby reducing the applicability of the detection device. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a natural gas pipeline leakage detection device to solve the technical problem that the existing detection device cannot detect natural gas pipelines of different diameters, thereby resulting in low applicability of the detection device.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a natural gas pipeline leakage detection device, including a power section, a detection section and a positioning section are sequentially arranged behind the power section, the power section is connected to the detection section through a universal connector, the detection section is connected to the positioning section through the universal connector, the positioning section is provided with the universal connector, the other end of the universal connector is provided with a fixed platform, and the fixed platform is provided with several groups of walking mechanisms for maintaining stability; the detection section includes a fixed column, both ends of the fixed column are fixedly connected with a universal connector, and the fixed column is provided with a magnetizing mechanism for magnetizing the natural gas pipeline and several groups of sensor mechanisms for detecting whether there is magnetic leakage in the natural gas pipeline. When in use, the power section drives the detection mechanism to move in the natural gas pipeline, the detection section detects the natural gas pipeline, the positioning section can monitor and record the position of the magnetic detection device in the detection process in real time, and the walking mechanism can ensure the stability of the detection device when detecting the natural gas pipeline.

[0006] Furthermore, the magnetization mechanism includes two groups of connection blocks, the fixed column is provided with a fixed groove, the two groups of connection blocks are slidably mounted in the fixed groove, and a plurality of groups of permanent magnet blocks distributed in an annular shape are arranged between the two groups of connection blocks, and the plurality of groups of permanent magnet blocks are connected end to end to form a closed annular shape; one group of connection blocks is fixedly connected to the fixed column by bolts, and two groups of clamping blocks are clamped on the fixed groove, and the two sides of the clamping blocks are respectively in contact with the other group of connection blocks and the side wall of the fixed groove. The magnetization mechanism saturates the natural gas pipeline through the permanent magnet block, and cooperates with the sensor mechanism to detect the natural gas pipeline. At the same time, the magnetization mechanism can change the diameter of the connection block according to the diameter of the natural gas pipeline, thereby improving the applicability of the detection device.

[0007] Furthermore, a rotatable movable block is arranged on the fixed platform, and the sensor structure includes a movable rod, and the two sides of the movable rod are in contact with the movable column and the fixed column respectively, and the movable block and the fixed column are provided with a second cylinder, and one end of the movable rod is sleeved on the second cylinder located on the movable block, and a matching groove is provided on the movable rod, and the second cylinder located on the fixed column is slidably clamped in the matching groove; a detection probe is arranged at the other end of the movable rod, and the detection probe is connected to the data processing device. The sensor structure is used to detect the natural gas pipeline and sense whether there is magnetic leakage in the natural gas pipeline. At the same time, the position of the sensor structure is adjustable, and it can cooperate with the magnetization structure to detect natural gas pipelines of different diameters, so that the applicability of the detection device is improved.

[0008] Furthermore, a detachable rubber bowl is provided on the power section, and the rubber bowl is in contact with the inner wall of the natural gas pipeline on all sides. The rubber bowl can separate the gas in the natural gas pipeline, so that the natural gas on both sides of the rubber bowl produces a pressure difference, thereby driving the detection device to move; the rubber bowl can be replaced and used to cooperate with the detection section, so that natural gas pipelines of different diameters can be detected, thereby improving the applicability of the detection device.

[0009] Furthermore, a prism is provided on the fixed platform, and the walking mechanism includes a support shaft, one end of which is hinged on the fixed platform, and the other end of which is fixedly connected to a roller, and the roller contacts the inner wall of the natural gas pipeline. The roller contacts the inner wall of the natural gas pipeline to play a supporting role, so that the detection device can move smoothly in the natural gas pipeline.

[0010] Furthermore, a matching block is provided on the support shaft, one side of which is arc-shaped, and the arc-shaped surface contacts the support shaft. Two groups of connecting rods are provided on the matching block, and the two groups of connecting rods are respectively located on both sides of the support shaft, and the two groups of connecting rods are slidably mounted on the fixed platform; the matching block and the prism are both provided with a first cylinder, and a spring is provided between the matching block and the prism, and the two ends of the spring are respectively installed on the two groups of the first cylinders. Through the matching of the matching block and the spring, the roller can be in close contact with the inner wall of the natural gas, and can adapt to natural gas pipelines of different sizes, thereby improving the applicability of the detection device.

[0011] The working principle and beneficial effects of this solution are:

[0012] When in use, first replace the appropriate rubber bowl according to the diameter of the natural gas pipeline to be detected, then replace the magnetizing mechanism with a suitable size, and adjust the sensor mechanism so that it can cooperate with the magnetizing mechanism; then put the power section, the detection section, the positioning section and the walking mechanism into the natural gas pipeline in turn. When the walking mechanism is placed into the natural gas pipeline, the walking mechanism can adapt to the diameter of the natural gas pipeline, and at the same time the rubber bowl is in full contact with the inner wall of the natural gas pipeline. The rubber bowl separates the gas in the natural gas pipeline and drives the detection device to move through the pressure difference of the natural gas in the pipeline; the detection device can change the detection diameter according to the diameter of the natural gas pipeline, so that the detection device can detect natural gas pipelines of different diameters, thereby improving the adaptability of the detection device.

[0013] When inspecting a natural gas pipeline, the permanent magnet block first magnetizes the natural gas pipeline to saturate the magnetization of the natural gas pipeline, and then detects the magnetic lines of force of the natural gas pipeline through the sensor structure. When there are defects in the natural gas pipeline, the magnetic lines of force will leak. After the detection probe detects the leakage magnetic signal, it will be transmitted to the data processing device. The signal is analyzed and processed by the data processing device and presented to the staff in the form of a waveform diagram. The staff can intuitively determine whether there are defects in the natural gas pipeline. The positioning node can accurately locate the position of the magnetic leakage in the natural gas pipeline, thereby facilitating the staff to repair the natural gas pipeline. When the walking mechanism moves in the natural gas pipeline, it can improve the stability of the detection device; the detection device can move in the natural gas pipeline and perform non-destructive testing on it. At the same time, it has high accuracy and can accurately detect defects in the natural gas pipeline, making the efficiency and accuracy of natural gas pipeline detection high.

[0014] 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

[0015] Figure 1 It is a structural schematic diagram of an embodiment;

[0016] Figure 2 is a side view of an embodiment;

[0017] Figure 3 It is a structural schematic diagram of the magnetization mechanism in the embodiment;

[0018] Figure 4 It is a structural schematic diagram of the sensor structure in the embodiment;

[0019] Figure 5 Schematic diagram of the structure of the walking mechanism in the embodiment.

[0020] The markings in the accompanying drawings are as follows: power section 1, detection section 2, positioning section 3, universal connector 5, fixed platform 6, prism 7, matching block 8, connecting rod 9, sliding groove 10, support shaft 11, roller 12, spring 13, first cylinder 14, fixed column 15, fixed groove 16, connecting block 17, card slot 18, permanent magnet block 19, card block 20, movable rod 21, second cylinder 22, matching groove 23, detection probe 24, movable block 25. DETAILED DESCRIPTION

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

[0022] Example

[0023] like Figures 1 to 5 As shown, a natural gas pipeline leakage detection device is disclosed, including a power section 1, to which a detection section 2 and a positioning section 3 are sequentially connected, the power section 1 is connected to the detection section 2 through a universal connector 5, the detection section 2 is connected to the positioning section 3 through the universal connector 5, the detection section 2 includes a fixed column 15, both ends of the fixed column 15 are fixedly connected to the universal connector 5, a magnetization mechanism and a plurality of sensor mechanisms are arranged on the fixed column 15 in a ring array, as shown in FIG. Figure 1 and Figure 2 shown.

[0024] The magnetization mechanism includes two groups of connection blocks 17, and a fixing groove 16 is provided on the fixing column 15. One of the two groups of connection blocks 17 is installed on the fixing column 15 and slidably clamped in the fixing groove 16. A plurality of groups of permanent magnet blocks 19 are arranged between the two groups of connection blocks 17. A clamping groove 18 is provided on the two groups of connection blocks 17. Both ends of the permanent magnet blocks 19 are clamped in the two groups of clamping grooves 18 respectively. A plurality of groups of permanent magnet blocks 19 are in contact with each other to form a closed ring. A plurality of groups of permanent magnet blocks 19 are close to the inner wall of the natural gas pipeline; one group of connection blocks 17 is fixedly connected to the fixing column 15 by bolts, and two groups of clamping blocks 20 are clamped in the gap between the other group of connection blocks 17 and the side wall of the fixing groove 16. The clamping blocks 20 are fan-shaped, and the two groups of clamping blocks 20 can form a closed ring. The clamping blocks 20 fix the two groups of connection blocks 17 to the fixing column 15, such as Figure 3 shown.

[0025] A rotatable movable block 25 is provided on the fixed column 15, and a plurality of groups of grooves are provided on the movable block 25, and the plurality of groups of grooves are distributed in a circular array on the movable block 25. The sensor mechanism includes a movable rod 21, and a detection probe 24 is provided at one end of the movable rod 21, and the detection probe 24 is close to the inner wall of the natural gas pipeline, and the detection probe 24 is connected to the data processing device. Both sides of the movable rod 21 are in contact with the movable block 25 and the fixed column 15, respectively. A plurality of groups of second cylinders 22 are provided on the movable block 25 and the fixed column 15, and the plurality of groups of second cylinders 22 are distributed in a circular array. The other end of the movable rod 21 is sleeved on one group of the second cylinders 22 of the movable block 25, and a matching groove 23 is provided on the movable rod 21, and the corresponding second cylinder 22 on the fixed column 15 is slidably mounted in the matching groove 23, as shown in FIG. Figure 4 shown.

[0026] The rear of the positioning section 3 is connected to a fixed platform 6 through a universal connector 5. The fixed platform 6 is provided with a plurality of walking mechanisms, which are arranged in a ring array. The walking mechanisms include a support shaft 11, which is hinged on the fixed platform 6. The other end of the support shaft 11 is fixedly connected to a roller 12, and the roller 12 contacts the inner wall of the pipe; two sets of sliding grooves 10 are provided on the fixed platform 6, and connecting rods 9 are slidably mounted in the two sets of sliding grooves 10. The two sets of connecting rods 9 are respectively located on both sides of the support shaft 11 , two groups of connecting rods 9 are fixedly connected to the matching block 8, one side of the matching block 8 is arc-shaped and the other side is horizontal, the arc-shaped surface of the matching block 8 is in contact with the support shaft 11, a prism 7 is arranged on the fixed platform 6, the number of edges of the prism 7 is equal to the number of groups of the walking mechanism, the side surface of the prism 7 and the horizontal surface of the matching block 8 are both provided with a first cylinder 14, a spring 13 is arranged between the prism 7 and the matching block 8, and the two ends of the spring 13 are respectively installed in the two groups of first cylinders 14, and are respectively in contact with the prism 7 and the matching block 8, as shown in FIG. Figure 5 shown.

[0027] A detachable rubber bowl is provided on the power section 1, and the power section 1 is used to drive the detection device to move in the natural gas pipeline; the permanent magnet block 19 is used to magnetize the natural gas pipeline, and the detection probe 24 collects the signal emitted by the magnetized natural gas pipeline, and inputs the signal into the data processing device, and converts the detected signal into a waveform diagram that the staff can understand; the positioning section 3 is used to monitor and record the position of the magnetic detection device in the detection process in real time, and can accurately locate the position where the magnetic leakage of the natural gas pipeline occurs; the walking mechanism is used to support the detection device to ensure the stability of the detection device structure when the detection device detects the natural gas pipeline, and can also assist the detection device to move in the natural gas pipeline. The power section 1, the positioning section 3 detection probe 24, the data processing device, the universal connector 5 and the permanent magnet block 19 are all technical means commonly used by technicians in the field, and their structures, connection methods and usage methods are all technologies well known to those skilled in the art.

[0028] When implementing

[0029] First, according to the diameter of the natural gas pipeline to be detected, replace the rubber cup of the corresponding diameter to ensure that the rubber cup can contact the inner wall of the natural gas pipeline on all sides; install the magnetization mechanism. When installing the magnetization, first fix one group of connecting blocks 17 to the fixed column 15 by bolts, and then clamp one end of several groups of permanent magnet blocks 19 in the clamping groove 18, and then clamp another group of connecting blocks 17 on the fixed groove 16, move the connecting block 17, so that the other end of the permanent magnet block 19 is clamped on the corresponding connecting block 17, at this time there is a gap between the connecting block 17 and the side wall of the fixed groove 16, and then clamp the two groups of clamping blocks 20 in the gap between the connecting block 17 and the side wall of the fixed groove 16, fix several groups of permanent magnet blocks 19, and then rotate the movable block 25, the movable block 25 is on the fixed column 15 Rotate, the movable block 25 drives one end of the movable rod 21 to rotate through the corresponding second cylinder 22, so that the matching groove 23 slides in the corresponding second cylinder 22, thereby driving the detection probe 24 to move, and the movement trajectory of the detection probe 24 is spiral, until several groups of detection probes 24 move to the appropriate position, at this time the detection probe 24 can detect the signal emitted by the natural gas pipeline, and will not contact the inner wall of the natural gas pipeline; the diameter of the rubber bowl in the power section 1 can be changed according to the diameter of the natural gas pipeline, and the diameter of the detection section 2 can be changed at the same time, the walking mechanism can adapt to the diameter of the natural gas pipeline, when detecting natural gas pipelines of different diameters, only minor changes need to be made to it to change the detected diameter, thereby improving the applicability of the detection device.

[0030] When the detection device is in use, the power section 1, the detection section 2, the positioning section 3 and the walking mechanism are placed into the natural gas pipeline in sequence. When the walking mechanism is placed in the natural gas pipeline, in the natural state of the walking mechanism, the distance between the several groups of rollers 12 is greater than the diameter of the inner wall of the natural gas pipeline. The staff needs to rotate the support shaft 11 around the hinge seat first. At this time, the support shaft 11 drives the matching block 8 to move, and the matching block 8 drives the connecting rod 9 to slide in the sliding groove 10. At the same time, the matching block 8 compresses the spring 13. At this time, the walking mechanism can enter the natural gas pipeline. At this time, the detection device completely enters the natural gas pipeline. At this time, the rubber bowl is completely in contact with the inner wall of the natural gas pipeline, and then the rubber bowl passes through the pressure difference of the natural gas in the pipeline. , driving the detection device to move in the natural gas pipeline. When moving, the permanent magnet block 19 magnetizes the natural gas pipeline to make the natural gas pipeline reach a state of magnetic saturation. When the natural gas pipeline is intact, the magnetic lines of force will be parallel to the inner wall of the natural gas pipeline. When there are defects in the natural gas pipeline, the magnetic lines of force will leak. At this time, the detection probe 24 can detect these leakage magnetic signals and transmit the magnetic leakage signals to the data processing device. The data processing device analyzes and processes the signals and presents them in the form of a waveform diagram. The staff can intuitively judge whether there are defects in the natural gas pipeline. At the same time, the roller 12 rolls on the inner wall of the natural gas pipeline, and cooperates with the power node 1 to make the detection device have a certain stability when moving.

[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 natural gas pipeline leakage detection device, characterized in that: It comprises a power section, a detection section and a positioning section are sequentially arranged behind the power section, the power section is connected to the detection section through a universal connector, the detection section is connected to the positioning section through the universal connector, the positioning section is provided with the universal connector, the other end of the universal connector is provided with a fixed platform, and the fixed platform is provided with a plurality of groups of walking mechanisms for maintaining stability; The detection section includes a fixed column, both ends of which are fixedly connected with universal connectors, and the fixed column is provided with a magnetizing mechanism for magnetizing the natural gas pipeline and several groups of sensor mechanisms for detecting whether the natural gas pipeline has magnetic leakage.

2. A natural gas pipeline leakage detection device according to claim 1, characterized in that: The magnetization mechanism includes two groups of connection blocks, the fixing column is provided with a fixing groove, the two groups of connection blocks are slidably clamped in the fixing groove, and a plurality of groups of permanent magnet blocks distributed in an annular shape are arranged between the two groups of connection blocks, and the plurality of groups of permanent magnet blocks are connected end to end to form a closed ring; One group of the connection blocks is fixedly connected to the fixing column by bolts, and two groups of clamping blocks are clamped on the fixing groove, and two sides of the clamping blocks are respectively in contact with the other group of connection blocks and the side wall of the fixing groove.

3. A natural gas pipeline leakage detection device according to claim 2, characterized in that: A rotatable movable block is arranged on the fixed platform, the sensor mechanism includes a movable rod and a data processing device, the two sides of the movable rod are in contact with the movable block and the fixed column respectively, the movable block and the fixed column are both provided with a second cylinder, one end of the movable rod is sleeved on the second cylinder located on the movable block, a matching groove is provided on the movable rod, and the second cylinder located on the fixed column is slidably clamped in the matching groove; A detection probe is arranged at the other end of the movable rod, and the detection probe is connected to the data processing device.

4. A natural gas pipeline leakage detection device according to claim 3, characterized in that: The power joint is provided with a detachable rubber bowl, and the rubber bowl is in contact with the inner wall of the natural gas pipeline on all sides.

5. A natural gas pipeline leakage detection device according to claim 4, characterized in that: The fixed platform is provided with a prism, and the walking mechanism includes a support shaft, one end of the support shaft is hinged on the fixed platform, and the other end of the support shaft is fixedly connected with a roller, and the roller contacts the inner wall of the natural gas pipeline.

6. A natural gas pipeline leakage detection device according to claim 5, characterized in that: The supporting shaft is provided with a matching block, one side of which is arc-shaped, and the arc-shaped surface is in contact with the supporting shaft. The matching block is provided with two groups of connecting rods, which are respectively located on both sides of the supporting shaft, and the two groups of connecting rods are slidably mounted on the fixing platform; The matching block and the prism are both provided with a first cylinder, a spring is provided between the matching block and the prism, and two ends of the spring are respectively installed on two groups of the first cylinders.

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