Ice plug pipeline shock vibration test device

Abstract

The application relates to an ice plug pipeline impact vibration test device and belongs to the field of nuclear power ice plug pipeline impact vibration tests, which comprises clamps, vertical columns, cross clamps, magnetic attraction devices, metal balls, vibration sensors, ice plug pipelines, infrared sensors and posture sensors; the ice plug pipelines are symmetrically provided with detachable clamps on two sides; vertical columns and posture sensors with scale marks are vertically installed on the two clamps respectively, and the vertical columns are confirmed to be vertically installed on the corresponding clamps through the posture sensors; cross clamps are detachably installed on the two vertical columns; the two cross clamps are transversely connected; the magnetic attraction devices are hung between the transversely connected two cross clamps, and the metal balls are adsorbed on the magnetic attraction devices; infrared sensors are installed on the two cross clamps respectively, and the horizontal moving distance and falling height of the metal balls are confirmed through the infrared sensors; and the vibration sensors are detachably installed on the ice plug pipelines. The application realizes analysis of ice plugs in a pipeline isolated by ice plugs in a nuclear power system under different external impact loads.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power ice plug pipeline impact vibration test, in particular to an ice plug pipeline impact vibration test device. BACKGROUND

[0002] Nuclear power plants are important clean energy production bases, and their safe operation is crucial. Nuclear power pipelines, as an important part of nuclear power plants, bear the task of transporting high-temperature and high-pressure steam and water and other media. During the overhaul of nuclear power plants, many devices need to be removed and repaired. During the device removal and repair process, the upstream and downstream need to be isolated or the liquid in the entire pipe system needs to be drained, or even the entire plant needs to be shut down, which brings great difficulty to the repair. With the development of low-temperature engineering technology, ice plug freezing plugging technology emerges as an effective system isolation technology, but during the ice plug process, there is a risk of ice plug failure or pipe rupture causing safety accidents. Therefore, it is particularly important to evaluate the safety of the ice plug. If the ice plug technology can be safely, effectively and reliably used for on-site detection and repair work, it will be a powerful support for the commissioning and repair work of the power plant.

[0003] At present, there have been basic application researches on ice plugs, but whether the ice plug can be stably formed when subjected to external impact and whether it will be broken after being formed, and the influence of the impact load on the performance of the pipe under low-temperature conditions still need to be researched. SUMMARY

[0004] The purpose of the present application is to provide an ice plug pipeline impact vibration test device, to realize the analysis of the ice plug in the nuclear power system under different external impact loads, to improve the maintenance efficiency of the nuclear power plant, and to ensure the safety, equipment safety and reliability of the nuclear power personnel.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] An ice plug pipeline impact vibration test device, comprising a clamp, a stand, a cross clamp, a magnetic attraction device, a metal ball, a vibration sensor, an ice plug pipeline, an infrared sensor and an attitude sensor; the ice plug pipeline is symmetrically detachably installed with the clamps on both sides; a stand with a scale mark and an attitude sensor are vertically installed on the two clamps respectively, and the vertical installation of the stand on the corresponding clamp is confirmed by the attitude sensor; a cross clamp is detachably installed on the two stands respectively; the two cross clamps are transversely connected; the magnetic attraction device is suspended between the two transversely connected cross clamps, and the metal ball is adsorbed on the magnetic attraction device; an infrared sensor is installed on each of the two cross clamps, and the horizontal moving distance and the falling height of the metal ball are confirmed by the infrared sensor; a vibration sensor is detachably installed on the ice plug pipeline.

[0007] Working principle: when the ice plug pipeline impact vibration test device is used for ice plug pipeline impact vibration test, the metal ball is allowed to freely fall from the magnetic attraction device and hit the ice plug pipeline, the ice plug pipeline generates vibration, and the vibration data of the ice plug pipeline is obtained through the vibration sensor on the ice plug pipeline. If it is desired to change the impact load on the ice plug pipeline, the height of the stand, the height of the metal ball from the ice plug pipeline and the distance between the stand and the vibration sensor can be changed by sliding the cross clamp to change the impact on the ice plug pipeline at different heights, and the sensor detects the vibration data under different falling height and different propagation distance combinations.

[0008] As one of the realizable modes, the clamp is divided into an upper clamp and a lower clamp, and the upper clamp and the lower clamp are fixedly connected through lifting ring bolts and butterfly nuts on both sides to form a clamping space, and the ice plug pipeline is clamped in the clamping space.

[0009] As one of the realizable modes, the upper clamp and the lower clamp are provided with a posture sensor installed through a screw.

[0010] As one of the realizable modes, the upper clamp is vertically provided with a stand; and the cross clamp is installed at an arbitrary position of the stand.

[0011] As one of the realizable modes, the stand is a hollow pipeline, and both ends are internally and externally threaded, so that the stand can be extended by screwing.

[0012] As one of the realizable modes, the magnetic attraction device is hung between the two cross clamps connected transversely through bolts and nuts.

[0013] As one of the realizable modes, the cross clamp is provided with an infrared sensor fixed through a screw.

[0014] As one of the realizable modes, the cross clamp is provided with a hole, and the infrared sensor is installed through a pre-pressed lining copper ring.

[0015] As one of the realizable modes, the ice plug pipeline impact vibration test device further comprises a computer terminal; the vibration sensor is in communication connection with the computer terminal; the vibration sensor is used for acquiring the vibration data of the ice plug pipeline in real time and sending the computer terminal; and the computer terminal is used for processing the vibration data of the ice plug pipeline.

[0016] As one of the realizable modes, the vibration data of the ice plug pipeline comprises a vibration amplitude and a vibration frequency of the ice plug pipeline.

[0017] The beneficial technical effects of the present application are as follows:

[0018] The ice plug pipeline impact vibration test device of the present application can explore the influence of different sizes of impact load on the ice plug of the pipeline, obtain the law of ice plug formation under the action of different sizes of impact load, help prevent serious problems such as pipeline blockage and rupture caused by ice plug, and thus ensure the safe operation of the pipeline; secondly, by detecting the impact vibration of the ice plug pipeline, the problem can be found and quickly located in time, the pipeline operation condition can be understood, potential safety hazards can be solved, pipeline downtime can be reduced, the safety of pipeline operation can be improved, personnel safety can be ensured, and environmental pollution can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of an embodiment of the ice plug pipeline impact vibration test device of the present application;

[0020] Figure 2 It is a schematic view of ice plug jacket section;

[0021] Figure 3 It is a schematic view of ice plug jacket structure;

[0022] Figure 4 It is a schematic view of ice plug frost line.

[0023] In the figure, 1, clamp; 2, lifting ring bolt; 3, wing nut; 4, stand; 5, cross clamp; 6, magnetic attraction device; 7, metal ball; 8, vibration sensor; 9, ice plug pipeline; 10, ice plug; 11, ice plug jacket; 12, frost line. DETAILED DESCRIPTION

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing the specific embodiments only and is not intended to be limiting of the application.

[0025] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0026] In the description of the present application, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium. The specific meanings of the above terms can be understood according to the specific circumstances by those skilled in the art.

[0027] The terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is usually placed, and are only for the convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0028] The terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to including the listed elements, other elements not explicitly listed can also be included. The technical solutions of the application are described below in conjunction with the drawings and specific embodiments.

[0030] Referring to Figure 1 , the embodiment provides an ice plug pipeline impact vibration test device, which comprises clamps 1, vertical columns 4, cross clamps 5, magnetic attraction devices 6, metal balls 7, vibration sensors 8, ice plug pipelines 9, infrared sensors and attitude sensors; the ice plug pipelines 9 are symmetrically and detachably installed with the clamps 1 on both sides; the vertical columns 4 and the attitude sensors with scale marks are vertically installed on the two clamps 1 respectively, and the vertical installation of the vertical columns 4 on the corresponding clamps 1 is confirmed through the attitude sensors; the cross clamps 5 are detachably installed on the two vertical columns 4 respectively; the two cross clamps 5 are transversely connected; the magnetic attraction devices 6 are hung between the transversely connected two cross clamps 5, and the metal balls 7 are adsorbed on the magnetic attraction devices 6; the infrared sensors are installed on the two cross clamps 5 respectively, and the horizontal moving distance and the falling height of the metal balls 7 are confirmed through the infrared sensors; and the vibration sensors 8 are detachably installed on the ice plug pipelines 9.

[0031] When the ice plug pipeline impact vibration test device is used to perform the ice plug pipeline impact vibration test, the metal ball 7 is allowed to freely fall from the magnetic attraction device 6 and hit the ice plug pipeline 9, the ice plug pipeline 9 generates vibration, and the vibration data of the ice plug pipeline 9 is obtained through the vibration sensor on the ice plug pipeline 9. If it is desired to change the influence of the impact load on the ice plug pipeline 9, the height of the vertical column 4, the height of the metal ball 7 from the ice plug pipeline 9 and the distance between the vertical column 4 and the vibration sensor 8 can be changed through the sliding cross clamp 5 to change the impact on the ice plug pipeline 9 at different heights, and the vibration sensor 8 can detect the vibration data under the combination of different falling heights and different propagation distances.

[0032] The ice plug pipeline impact vibration test device of the application is used to perform the ice plug pipeline impact vibration test after the ice plug is formed. In each ice plug pipeline impact vibration test, the liquid freezing effect in the pipeline is consistent, and the pipeline temperature is consistent.

[0033] In order to ensure that the liquid freezing effect in the pipeline is consistent during each ice plug pipeline impact vibration test, a standard ice plug jacket and control equipment are used to ensure that the size of the ice plug is the same each time. Specifically, the ice plug is formed controllably through a pipe wall surface frost line, a temperature sensor, and a regulating valve; the ice plug formation length is confirmed through the pipe wall surface frost line; the pipeline temperature field is detected through the temperature sensor; and the flow of liquid nitrogen in the ice plug jacket installed on the pipeline is controlled through the regulating valve, so that a controllable size ice plug is finally formed.

[0034] In order to ensure that the pipeline temperature is consistent during each ice plug pipeline impact vibration test, the formation size of the ice plug is first ensured to be the same, and then the liquid nitrogen flow is controlled to ensure that the overall temperature field of the pipeline remains stable, thereby eliminating the influence of temperature.

[0035] Referring to Figures 2-3 , the ice plug jacket is a cylindrical cavity, which is divided into two halves and clamped on the pipeline, and liquid nitrogen is introduced into the cavity to exchange heat with the liquid in the pipeline to freeze the liquid.

[0036] Referring to Figure 4 , as the heat exchange between the ice plug jacket, the pipeline, the liquid, and the environment proceeds, when the temperature of the pipeline surface decreases to 0℃, a frost line will gradually form on the pipeline surface, and the length of the frost line corresponds to the length of the ice plug in the pipeline, that is, the length of the ice plug is approximately equal to the sum of twice the length of the frost line and the length of the ice plug jacket.

[0037] Since the pipeline is an axisymmetric structure, a patch type temperature sensor is pasted on the outer wall of the pipeline at a predetermined position in the axial direction, and by obtaining the temperature of each point and fitting, the pipeline temperature field data is obtained.

[0038] According to the temperature and frost line feedback, the valve opening is adjusted to balance the heat exchange between the ice plug jacket, the pipeline, the liquid, and the environment, and to maintain the stability of the ice plug.

[0039] In this embodiment, as one of the realizable modes, the clamp 1 is divided into an upper clamp and a lower clamp, and the upper clamp and the lower clamp are fixedly connected by a lifting ring bolt 2 and a butterfly nut 3 on both sides to form a clamping space, and the ice plug pipeline 9 is clamped in the clamping space.

[0040] In this embodiment, as one of the realizable modes, the upper clamp and the lower clamp are provided with a screw-mounted posture sensor.

[0041] In this embodiment, as one of the realizable modes, a vertical column 4 is vertically mounted on the top of the upper clamp; and a cross clamp 5 is mounted at an arbitrary position on the vertical column 4.

[0042] In this embodiment, as one of the realizable modes, the vertical column 4 is a hollow pipeline, and both ends are internally and externally threaded, so that the vertical column 4 can be spliced and lengthened through threads.

[0043] In this embodiment, as one of the ways that can be achieved, the two cross clamps 5 connected transversely are suspended by bolts and nuts.

[0044] In this embodiment, as one of the ways that can be achieved, the cross clamp 5 is fixed with the infrared sensor by screws.

[0045] In this embodiment, as one of the ways that can be achieved, the cross clamp 5 is fixed with the infrared sensor by screws.

[0046] In this embodiment, as one of the ways that can be achieved, the ice plug pipeline impact vibration test device further comprises a computer terminal; the vibration sensor 8 is in communication connection with the computer terminal; the vibration sensor 8 is used for acquiring the vibration data of the ice plug pipeline 9 in real time and sending the computer terminal; the computer terminal is used for processing the vibration data of the ice plug pipeline 9.

[0047] In this embodiment, as one of the ways that can be achieved, the vibration data of the ice plug pipeline 9 comprises the vibration amplitude and the vibration frequency of the ice plug pipeline 9.

[0048] The above-mentioned embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A test apparatus for impact vibration of an ice-blocked pipe, characterized in that, The device includes clamps (1), columns (4), cross clamps (5), magnetic suction devices (6), metal balls (7), vibration sensors (8), ice plug pipes (9), infrared sensors, and attitude sensors. Clamps (1) are symmetrically and detachably installed on both sides of the ice plug pipes (9). Columns (4) with scale markings and attitude sensors are vertically installed on the two clamps (1), and the attitude sensors confirm that the columns (4) are vertically installed on the corresponding clamps (1). Cross clamps (5) are detachably installed on the two columns (4). The two cross clamps (5) are horizontally connected. Magnetic suction devices (6) are suspended between the two horizontally connected cross clamps (5), and the metal balls (7) are attracted to the magnetic suction devices (6). Infrared sensors are installed on the two cross clamps (5), and the horizontal movement distance and falling height of the metal balls (7) are confirmed by the infrared sensors. Vibration sensors (8) are detachably installed on the ice plug pipes (9).

2. The ice plug pipeline impact vibration testing device according to claim 1, characterized in that, The clamp (1) is divided into an upper clamp and a lower clamp. The upper clamp and the lower clamp are fixedly connected on both sides by eye bolts (2) and wing nuts (3) to form a clamping space. The ice plug pipe (9) is clamped in the clamping space.

3. The ice plug pipeline impact vibration testing device according to claim 2, characterized in that, The attitude sensor is mounted on the upper and lower clamps using screws.

4. The ice plug pipeline impact vibration testing device according to claim 2, characterized in that, A column (4) is vertically installed on the top of the upper clamp; a cross clamp (5) is installed at any position on the column (4).

5. The ice plug pipeline impact vibration testing device according to claim 1, characterized in that, The column (4) is a hollow pipe with internal and external threads at both ends.

6. The ice plug pipeline impact vibration testing device according to claim 1, characterized in that, A magnetic suction device (6) is suspended between two horizontally connected cross clamps (5) by bolts and nuts.

7. The ice plug pipeline impact vibration testing device according to claim 1, characterized in that, The cross clamp (5) secures the infrared sensor with screws.

8. The ice plug pipeline impact vibration testing device according to claim 1, characterized in that, The cross clamp (5) is installed by pre-pressed inner copper ring.

9. The ice plug pipeline impact vibration testing device according to claim 1, characterized in that, It also includes a computer terminal; a vibration sensor (8) is connected to the computer terminal for communication; the vibration sensor (8) is used to acquire the vibration data of the ice plug pipe (9) in real time and send it to the computer terminal; the computer terminal is used to process the vibration data of the ice plug pipe (9).

10. The ice plug pipeline impact vibration testing device according to claim 9, characterized in that, The vibration data of the ice plug pipe (9) includes the vibration amplitude and vibration frequency of the ice plug pipe (9).

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