Inspection device and detection method for purging cleanliness degree of pipeline system
The inspection device using mirrored aluminum plates and anti-fog components solves the problem of difficulty in verifying the cleanliness of pipeline systems after purging, enabling rapid and reliable cleanliness assessment, improving safety and economy, and adapting to various pipe diameters.
Patent Information
- Application Number
- CN202610030420.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-12
- Publication Date
- 2026-03-03
AI Technical Summary
Existing technologies lack intuitive and quantitative methods to verify the degree of internal cleanliness of pipeline systems after purging, leading to incomplete cleaning or over-purging, which poses safety hazards and poor economic efficiency.
An inspection device comprising a mirrored aluminum plate, a support beam, and an anti-fog component was designed. The device allows for observation of impurity impact marks through the mirrored aluminum plate and real-time temperature adjustment by the anti-fog component, providing an objective judgment of cleanliness.
It enables rapid and reliable pipeline cleanliness assessment, improves operational safety and economy, reduces material costs and waste, adapts to various pipe diameters, and simplifies the operation process.
Smart Images
Figure CN121595572A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pressure vessel and cryogenic equipment technology, specifically to a testing device and method for inspecting the cleanliness of a pipeline system. Background Technology
[0002] During the production, assembly, or maintenance of cryogenic containers and their piping systems, impurities such as metal shavings, welding slag, and dust inevitably remain inside the system. If these impurities, especially metal particles, are not removed, they may flow with the medium during subsequent operation, causing severe wear, jamming, or even damage to critical equipment such as valves and pumps. This can easily lead to safety accidents such as leaks and shutdowns, resulting in significant economic losses.
[0003] Currently, the industry typically uses compressed air or nitrogen to purge pipelines after system installation to remove impurities. However, existing techniques have significant shortcomings: after purging, there is a lack of direct and effective verification methods to objectively assess the cleanliness of the pipeline interior. The industry generally relies on experience or preset purging times to subjectively judge whether cleaning standards have been met. This method lacks intuitive and quantifiable data support, is not only inefficient and wasteful of manpower and time, but more importantly, it presents significant quality blind spots and safety hazards. Incomplete cleaning may lead to premature equipment failure, while over-purging wastes energy and time, making it difficult to guarantee both the company's economic viability and production reliability.
[0004] Therefore, there is an urgent need to develop a specialized device that can quickly, intuitively, and reliably inspect the internal cleanliness of a pipeline system after purging, in order to solve the problems of existing technologies relying on experience, being unverifiable, posing safety hazards, and being uneconomical. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a test device for the cleanliness of pipeline system purging that is intuitive, adaptable, easy to operate and reusable.
[0006] The technical problem to be solved by the present invention is achieved through the following technical solution: a device for testing the cleanliness of a pipeline system, comprising; The shell, which forms a flat, plate-like structure; A mirror-finished aluminum plate has a mounting groove in the middle of the housing. The mirror-finished aluminum plate is inserted into the mounting groove of the housing. An air inlet communicating with the mounting groove is provided at the bottom of the housing. Several support beams are fixed at their top ends to the bottom wall of the shell, and upper tile seats are fixed at their bottom ends. Lower tile seats are detachably installed on the bottom surface of the upper tile seats by bolt fasteners. Columnar grooves for accommodating the outer circumference of the pipe to be tested are opened on the bottom surface of the upper tile seats and the top surface of the lower tile seats.
[0007] The technical problem to be solved by the present invention can also be achieved through the following technical solution: the above-mentioned testing device for the cleanliness of pipeline system purging, wherein several of the aforementioned support beams are parallel to each other.
[0008] The technical problem to be solved by the present invention can also be achieved through the following technical solution: the above-mentioned testing device for the cleanliness of a pipeline system, wherein the support beam is vertically fixed on the bottom surface of the shell.
[0009] The technical problem to be solved by the present invention can also be achieved through the following technical solution: the above-mentioned testing device for the cleanliness of pipeline system purging, wherein the mirror aluminum plate is arranged parallel to the shell.
[0010] The technical problem to be solved by the present invention can also be achieved through the following technical solution: the above-mentioned device for testing the cleanliness of a pipeline system, wherein the length of the mirror aluminum plate is greater than the length of the mounting groove.
[0011] The technical problem to be solved by the present invention can also be achieved by the following technical solution: the above-mentioned device for testing the cleanliness of a pipeline system, wherein the axis of the columnar groove is parallel to the bottom surface of the shell.
[0012] The technical problem to be solved by the present invention can also be achieved by the following technical solution: a detection method using an inspection device for the cleanliness of a pipeline system as described in any of the above claims, wherein the inspection device further includes an anti-fog component, the anti-fog component comprising; An electric heating film is adhered to the side of the mirrored aluminum plate away from the air inlet. An aluminum plate temperature sensor is fixed to the edge of a mirrored aluminum plate and is used to detect the temperature of the mirrored aluminum plate. A temperature and humidity sensor is installed on the side wall of the air inlet of the housing, and it is used to detect the temperature and humidity of the environment at the air inlet in real time. The controller is fixed to the top of the housing; The electric heating film and the temperature and humidity sensor are electrically connected to the controller via wires. The detection method is as follows: the aluminum plate temperature sensor and the temperature and humidity sensor continuously collect data and send it to the controller. The controller calculates the approximate dew point temperature Td of the current environment in real time based on the currently detected ambient temperature T, relative humidity RH and the temperature Ts of the mirror aluminum plate: Td = (b*α(T,RH) / (a-α(T,RH)); where α(T,RH)=(a*T) / (b+T)+ln(RH / 100), and ln is the natural logarithm; a and b use Magnus's formula coefficients, i.e., a=17.27 and b=237.7. The controller compares the calculated dew point temperature Td with the surface temperature Ts of the mirror aluminum plate in real time. When the surface temperature Ts of the mirror aluminum plate is determined to be lower than or equal to the dew point temperature Td, the controller determines that there is a risk of condensation and immediately outputs a control signal to the electric heating film to start heating. The target temperature for heating is set to be higher than the current dew point temperature Td by a preset safety margin value ΔT. The safety margin value ΔT ranges from 1℃ to 5℃. The controller continuously compares the real-time surface temperature Ts of the mirror aluminum plate with the target temperature (Td+ΔT) and adjusts the power output to the electric heating film in real time according to the difference between the two to maintain the surface temperature Ts of the mirror aluminum plate at the target temperature ±2℃.
[0013] Compared with the prior art, the beneficial technical effects of the present invention are: (1) By installing a pluggable mirror aluminum plate on the housing of the device, and installing the housing on the pipeline, when the exhaust path of the pipeline is directly facing the mirror aluminum plate, the impurity particles carried by the airflow blown out by the pipeline can directly impact and adhere to the smooth surface of the aluminum plate, forming pits or spots visible to the naked eye. By observing the cleanliness of the surface of the mirror aluminum plate, the operator can directly and objectively judge whether there are still impurities inside the pipeline. This completely changes the subjective and vague judgment method that previously relied on experience and time estimation, and provides a clear and reliable acceptance standard for the purging process.
[0014] (2) By setting up a clamping and fixing structure consisting of a support beam, an upper tile seat and a detachable lower tile seat, and opening columnar grooves on the upper and lower tile seats to accommodate the pipe, the device can be firmly clamped on the outer wall of pipes of different diameters. This modular and adjustable installation method allows a single device to adapt to various specifications of pipeline systems without the need to customize special tools for each pipe diameter, which significantly improves the applicability and economic efficiency of the device.
[0015] (3) The device adopts a split design, and the mirror aluminum plate can be easily plugged in and replaced. The support and fixing mechanism can be quickly installed and disassembled by bolt fasteners, realizing "convenient operation by one person". The locking mechanism ensures the stability of the device under the purging high-pressure airflow, prevents accidental falling off, and improves the safety of operation. At the same time, the simple structural design makes the device have low airflow resistance and does not affect the normal exhaust efficiency of the system.
[0016] (4) The mirror aluminum plate is a core consumable component with low cost, and its surface can be polished to restore its smoothness, enabling multiple reuses. Compared with other possible disposable detection materials or complex sensors, this device greatly saves on the material cost for long-term use and reduces waste, and has good economic and environmental benefits, and is highly practical. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the main view structure when the present invention is in use; Figure 2 This is a schematic diagram of the exploded structure of the present invention; Figure 3 This is a bottom view of the housing structure of the present invention; Figure 4 This is a schematic diagram of the left side structure of the housing of the present invention.
[0018] Reference numerals in the attached drawings: 1. Shell; 2. Mirror aluminum plate; 3. Mounting groove; 4. Air inlet; 5. Pipe; 6. Support beam; 7. Upper tile seat; 8. Lower tile seat. Detailed Implementation
[0019] The specific technical solutions of the present invention will be further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand the present invention, without constituting a limitation on its rights.
[0020] Example 1, referring to Figure 1-4 An apparatus for testing the cleanliness of a pipeline system after purging, comprising: Shell 1, which forms a flat plate structure with a square cross-section; The mirror aluminum plate 2 has an installation groove 3 in the middle of the housing 1. The installation groove 3 is a square groove. The mirror aluminum plate 2 is inserted into the installation groove 3 of the housing 1. The length of the mirror aluminum plate 2 is greater than the length of the installation groove 3. The specific length value can be customized according to the length of the housing 1 or the length of the pipe 5 to be tested. The reason for designing the length of the mirror aluminum plate 2 to be greater than the length of the installation groove 3 is to make it easier to remove the mirror aluminum plate 2 from the installation groove 3 and to make it easier to drag by hand. The mirror aluminum plate 2 is set parallel to the housing 1. An air inlet 4 is opened at the bottom of the housing 1 and communicates with the installation groove 3. The air inlet 4 is used to receive the airflow blown out from the external pipe 5 below. Several support beams 6 are formed into roughly square beams. The number of support beams can be set according to the length of the shell 1. The top ends of the support beams 6 are vertically fixed to the bottom wall of the shell 1 at intervals. The support beams 6 are parallel to each other. The bottom end of the support beams 6 is fixed with an upper tile seat 7. The upper tile seat 7 is formed into a roughly hollow semi-cylindrical structure, so as to facilitate fitting onto the top outer circumference of the pipe 5 to be tested. A lower tile seat 8 is detachably installed on the bottom surface of the upper tile seat 7 by bolt fasteners. The lower tile seat 8 is formed into a roughly hollow semi-cylindrical structure, so as to facilitate fitting onto the bottom outer circumference of the pipe 5 to be tested. Columnar grooves for accommodating the outer circumference of the pipe 5 to be tested are opened on the bottom surface of the upper tile seat 7 and the top surface of the lower tile seat 8. The columnar grooves are actually semi-cylindrical groove structures. The axis of the columnar grooves is parallel to the bottom surface of the shell 1.
[0021] It should be noted that the detection device in Example 1 is applicable to pipe 5 with the air outlet facing vertically upward and the air inlet pipe set horizontally.
[0022] The testing device for the cleanliness of a pipeline system in Example 1 is used in the following steps: First, the upper bearing seat 7 and lower bearing seat 8 of the device are securely clamped and fixed to the outer circumference of the pipeline 5 to be tested using bolts. During installation, the position of the device needs to be adjusted so that the outlet end of the pipeline 5 is directly facing and vertically towards the air inlet 4 at the bottom of the housing 1. Then, the valve of the pipeline 5 is opened, allowing a high-speed airflow (such as compressed air or nitrogen) to enter the pipeline 5 and spray out from the outlet, directly impacting the area of the air inlet 4. This stage is coarse purging, which aims to remove most of the loose particulate impurities in the pipeline 5. After the coarse purging continues for a predetermined time, the valve of the pipeline 5 is closed, and the airflow is stopped. Next, the mirror aluminum plate 2 is smoothly inserted into the mounting groove 3 of the housing 1, ensuring it is fully in place. Then, the valve of the pipeline 5 is opened again for fine purging. At this time, the remaining fine impurities are blown out with the airflow and impact the surface of the mirror aluminum plate 2. After the fine purging continues for a period of time, the valve is closed. Finally, remove the mirror aluminum plate 2 from the mounting slot 3 and carefully inspect its smooth surface under light. If white or black dents, spots, or other impact marks appear on the surface, it indicates that impurities still remain inside the pipe 5. The above purging and observation process can be repeated, and a new mirror aluminum plate 2 should be replaced before each fine purging. When the surface is intact and free of any dents or spots after the last replacement of the aluminum plate and purging, it can be determined that there are no impurities inside the pipe 5 system, and the purging and cleaning work has met the requirements.
[0023] The testing device also includes an anti-fog component, which includes: An electric heating film is adhered to the side of the mirrored aluminum plate away from the air inlet. An aluminum plate temperature sensor is fixed to the edge of a mirrored aluminum plate and is used to detect the temperature of the mirrored aluminum plate. A temperature and humidity sensor is installed on the side wall of the air inlet of the housing, and it is used to detect the temperature and humidity of the environment at the air inlet in real time. The controller is fixed to the top of the housing; The electric heating film and the temperature and humidity sensor are electrically connected to the controller via wires. The detection method is as follows: the aluminum plate temperature sensor and the temperature and humidity sensor continuously collect data and send it to the controller. The controller calculates the approximate dew point temperature Td of the current environment in real time based on the currently detected ambient temperature T, relative humidity RH and the temperature Ts of the mirror aluminum plate: Td = (b*α(T,RH) / (a-α(T,RH)); where α(T,RH)=(a*T) / (b+T)+ln(RH / 100), and ln is the natural logarithm; a and b use Magnus's formula coefficients, i.e., a=17.27 and b=237.7. The controller compares the calculated dew point temperature Td with the surface temperature Ts of the mirror aluminum plate in real time. When the surface temperature Ts of the mirror aluminum plate is determined to be lower than or equal to the dew point temperature Td, the controller determines that there is a risk of condensation and immediately outputs a control signal to the electric heating film to start heating. The target temperature for heating is set to be higher than the current dew point temperature Td by a preset safety margin value ΔT. The safety margin value ΔT ranges from 1℃ to 5℃. The controller continuously compares the real-time surface temperature Ts of the mirror aluminum plate with the target temperature (Td+ΔT) and adjusts the power output to the electric heating film in real time according to the difference between the two to maintain the surface temperature Ts of the mirror aluminum plate at the target temperature ±2℃.
Claims
1. A device for testing the cleanliness of a pipeline system after purging, characterized in that: include; The shell, which forms a flat, plate-like structure; A mirror-finished aluminum plate has a mounting groove in the middle of the housing. The mirror-finished aluminum plate is inserted into the mounting groove of the housing. An air inlet communicating with the mounting groove is provided at the bottom of the housing. Several support beams are fixed at their top ends to the bottom wall of the shell, and upper tile seats are fixed at their bottom ends. Lower tile seats are detachably installed on the bottom surface of the upper tile seats by bolt fasteners. Columnar grooves for accommodating the outer circumference of the pipe to be tested are opened on the bottom surface of the upper tile seats and the top surface of the lower tile seats.
2. The device for testing the cleanliness of a pipeline system according to claim 1, characterized in that: Several of the aforementioned support beams are parallel to each other.
3. The device for testing the cleanliness of a pipeline system according to claim 1, characterized in that: The support beam is vertically fixed to the bottom surface of the shell.
4. The device for testing the cleanliness of a pipeline system according to claim 1, characterized in that: The mirrored aluminum plate is arranged parallel to the housing.
5. The device for testing the cleanliness of a pipeline system according to claim 1, characterized in that: The length of the mirrored aluminum plate is greater than the length of the mounting groove.
6. The device for testing the cleanliness of a pipeline system according to claim 1, characterized in that: The axis of the columnar groove is parallel to the bottom surface of the shell.
7. A testing method using the testing device for the cleanliness of a pipeline system as described in any one of claims 1-6, characterized in that: The testing device also includes an anti-fog component, which includes: An electric heating film is adhered to the side of the mirrored aluminum plate away from the air inlet. An aluminum plate temperature sensor is fixed to the edge of a mirrored aluminum plate and is used to detect the temperature of the mirrored aluminum plate. A temperature and humidity sensor is installed on the side wall of the air inlet of the housing, and it is used to detect the temperature and humidity of the environment at the air inlet in real time. The controller is fixed to the top of the housing; The electric heating film and the temperature and humidity sensor are electrically connected to the controller via wires. The detection method is as follows: the aluminum plate temperature sensor and the temperature and humidity sensor continuously collect data and send it to the controller. The controller calculates the approximate dew point temperature Td of the current environment in real time based on the currently detected ambient temperature T, relative humidity RH and the temperature Ts of the mirror aluminum plate: Td = (b*α(T,RH) / (a-α(T,RH)); where α(T,RH)=(a*T) / (b+T)+ln(RH / 100), and ln is the natural logarithm; a and b use Magnus's formula coefficients, i.e., a=17.27 and b=237.
7. The controller compares the calculated dew point temperature Td with the surface temperature Ts of the mirror aluminum plate in real time. When the surface temperature Ts of the mirror aluminum plate is determined to be lower than or equal to the dew point temperature Td, the controller determines that there is a risk of condensation and immediately outputs a control signal to the electric heating film to start heating. The target temperature for heating is set to be higher than the current dew point temperature Td by a preset safety margin value ΔT. The safety margin value ΔT ranges from 1℃ to 5℃. The controller continuously compares the real-time surface temperature Ts of the mirror aluminum plate with the target temperature (Td+ΔT) and adjusts the power output to the electric heating film in real time according to the difference between the two to maintain the surface temperature Ts of the mirror aluminum plate at the target temperature ±2℃.