WO2021006452A1 - Multi-inspection and multi-step gas leak defect inspection system - Google Patents

Abstract

The present relates to a gas leak defect inspection system. The present invention provides a gas leak defect inspection system that is formed in a structure that only supplies compressed air to an object to be inspected and does not recover the air again, such that since a plurality of objects to be inspected can be connected in parallel through a multi-manifold, it is possible to simultaneously inspect a plurality of objects to be inspected for gas leak defects during a single inspection operation, and when inspecting the objects to be inspected for gas leaks, it is possible to perform the inspection under a plurality of target pressure states in consideration of the use environment of the objects to be inspected rather than performing the inspection under a single target pressure state, thereby enabling a more accurate inspection. The order of target pressures can be specified, such that compressed air under a plurality of target pressure states can be smoothly provided. It is possible to more accurately simulate the actual use environment of the objects to be inspected, such that the accuracy of a gas leak inspection result can be improved, and a single inspection cycle, in which an inspection is performed under a plurality of target pressure states, is repeated automatically, such that inspection accuracy can be further improved.

Description

Multi-inspection and multi-step gas leak defect inspection system

The present invention relates to a gas leak defect inspection system. More specifically, by forming a structure in which compressed air is supplied to the object to be inspected but does not recover it again, a plurality of inspection objects can be connected in parallel through a multi-manifold, so that gas leakage defects for multiple inspection objects during one inspection operation It is possible to simultaneously check whether the test object is leaked, and to perform the inspection under multiple target pressure states in consideration of the use environment of the test target rather than performing the test under a single target pressure state when gas leakage is tested. Inspection is possible and the order of target pressure can be specified, so that the supply of compressed air under multiple target pressures can be smoothly performed, and the actual use environment for the object to be inspected can be more accurately simulated. The present invention relates to a gas leak defect inspection system that can improve accuracy and further improve inspection accuracy by repeatedly automatically performing one inspection cycle for inspection under a plurality of target pressure states.

In general, various manufacturing plants are equipped with various facilities for supplying gas, and it is very important for these gas facilities to stably maintain a sealed state in order to prevent gas leakage.

In addition to gas facilities used in manufacturing plants, refrigerant gas is circulated and supplied to cooling devices such as air conditioners and refrigerators widely used in vehicles, homes, and offices, so it is very important to maintain a sealed state to prevent leakage of refrigerant gas. Do.

Since the sealing performance for preventing gas leakage is very important in various facilities using gas as described above, it is necessary to continuously check whether gas is leaked from the facility periodically or when an operation abnormality occurs.

In general, the equipment to check for gas leakage is configured to connect the test object on a gas flow line that supplies and recovers the test gas so that the test gas passes through the test object and is recovered again. In this case, the pressure difference between the supply port of the test gas and the recovery port of the test gas is detected, or in this state, the object to be inspected is put into water to observe whether bubbles are generated.

In this way, since the state of the gas leak defect of the inspection object is inspected by supplying and recovering the test gas to the inspection object, only one inspection object has to be inspected by one gas leakage defect inspection equipment. There is a problem such as taking a long time to inspect the object to be inspected. In addition, since the inspection operation is performed in a manner of visually observing the occurrence of bubbles, there is a problem that the inspection accuracy is significantly deteriorated.

In addition, depending on the type of the object to be inspected, it is necessary to increase the supply pressure of the test gas or to perform the inspection at different pressures.In order to supply the high-pressure test gas, the test gas supply facility must be enlarged. Therefore, the overall size of the gas leak defect inspection equipment is enlarged, increasing the manufacturing cost, making it difficult to transport, making field inspection impossible, and it is difficult to control the supply pressure of the test gas, making it impossible to apply it to various equipment. .

In addition, gas facilities that are subject to be inspected are not used only in a specific pressure state in the actual use environment, but are used in various pressure states. Therefore, if the test is performed only in a certain pressure state in the process of testing for gas leak defects, There is a problem in that it is not possible to accurately determine whether gas leaks in an actual environment of use.

The present invention was invented to solve the problems of the prior art, and an object of the present invention is to form a structure in which compressed air is supplied to the object to be inspected but not recovered again, thereby connecting a plurality of objects to be inspected in parallel through a multi-manifold. It is possible to provide a gas leak defect inspection system capable of simultaneously inspecting a plurality of inspection objects for gas leakage defects during one inspection operation.

Another object of the present invention is to install a temperature and humidity sensor capable of detecting the temperature and humidity of compressed air supplied to the object to be inspected, so whether the change in pressure by the pressure measurement sensor is affected by temperature and humidity in consideration of the measured value of the temperature and humidity sensor. To provide a gas leak defect inspection system capable of verifying whether or not it is caused by a gas leak defect, and correcting or verifying the result of determining whether a gas leak defect for an inspection object is correct.

Another object of the present invention is to provide a pressure-increasing module capable of increasing the pressure of compressed air supplied to an object to be inspected, and to selectively supply the increased compressed air to the object to be inspected. It is to provide a gas leak defect inspection system that can supply compressed air of pressure to the inspection object, and thus can be applied to all inspection objects having various specifications.

Another object of the present invention is to perform the inspection in a plurality of target pressure states in consideration of the use environment of the inspection object, rather than performing the inspection operation under a single target pressure state when a gas leak test is performed on an inspection object. It is possible and the order of target pressure can be specified, so that the supply of compressed air under multiple target pressures can be smoothly performed, and the accuracy of the gas leak inspection result as it can more accurately simulate the actual use environment of the inspection object. It is to provide a gas leak defect inspection system that can improve.

Another object of the present invention is to provide a gas leak defect inspection system capable of further improving inspection accuracy by repeatedly automatically performing one inspection cycle for inspection under a plurality of target pressure conditions.

Another object of the present invention is that a plurality of inspection objects can be simultaneously inspected, and even when a gas leak defect is determined for any one inspection object, it is possible to continuously inspect the remaining inspection objects, thereby inspecting a plurality of inspection objects. It is to provide a gas leak defect inspection system that can perform the work more quickly.

The present invention provides a gas leak defect inspection system for connecting an inspection object having a gas flow path formed thereon to check whether a gas leak defect has occurred in the inspection object, comprising: an air supply module supplying compressed air; A first regulator disposed downstream of the air supply module to allow the compressed air supplied by the air supply module to pass therethrough to constantly adjust the pressure of the compressed air to a first reference pressure state; A multi-manifold in which one inlet port is formed so that the compressed air passing through the first regulator is introduced into the interior, and a plurality of discharge ports are formed so that the compressed air introduced into the interior is discharged; A plurality of supply lines having one end connected to a plurality of discharge ports of the multi-manifold and the other end connected to the inspection object; An on-off valve mounted on each of the plurality of supply lines; A pressure measuring sensor connected to a point downstream of the position of the on/off valve on the plurality of supply lines to measure internal pressures of the plurality of supply lines, respectively; And a control unit for controlling the operation of the air supply module and the on/off valve, wherein the control unit receives measured values of the plurality of pressure measurement sensors, and a plurality of supply lines based on a change amount of the applied measured values over time It provides a gas leak defect inspection system, characterized in that determining whether each of the gas leak defects for a plurality of inspection objects each connected to.

At this time, the control unit opens and operates the on/off valve until the measured value of the pressure measurement sensor becomes the first reference pressure state, and when the measured value of the pressure measurement sensor becomes the first reference pressure state, the opening/closing When the valve is closed and the open/close valve is closed and the measured value change amount of the pressure measurement sensor is calculated for a reference time, and the calculated measured value change amount is greater than or equal to a preset reference change amount, gas leakage to the inspection object It can be judged to be defective.

In addition, the present invention is a gas leak defect inspection system for inspecting whether a gas leak defect of the inspection object by connecting the inspection object having a gas flow path, the compressed air supply unit for generating and supplying compressed air; A multi-manifold in which one inlet port is formed so that the compressed air supplied by the compressed air supply unit is introduced, and a plurality of discharge ports are formed so that the compressed air introduced into the inside is discharged; A plurality of supply lines having one end connected to a plurality of discharge ports of the multi-manifold and the other end connected to the inspection object; An on-off valve mounted on each of the plurality of supply lines; A pressure measuring sensor connected to a point downstream of the position of the on/off valve on the plurality of supply lines to measure internal pressures of the plurality of supply lines, respectively; A pressure setting unit configured to input at least one main target pressure for the compressed air and at least one auxiliary target pressure different from the main target pressure; And a control unit for controlling the operation of the compressed air supply unit and the opening/closing valve so that compressed air in the state of the main target pressure and the auxiliary target pressure is supplied to the object, respectively, according to an input signal of the pressure setting unit, the control unit In a state in which compressed air is supplied to the test object in the state of the main target pressure and the auxiliary target pressure, the measured values of the plurality of pressure measuring sensors are applied for each supply state, and the change amount of the applied measured values over time It provides a gas leak defect inspection system, characterized in that it is determined whether or not each of the gas leak defects for a plurality of inspection objects each connected to the plurality of supply lines.

At this time, the control unit opens and operates the on/off valve on the supply line until the measured value of the pressure measurement sensor becomes the main target pressure or the auxiliary target pressure, and the measured value of the pressure measurement sensor is the main target pressure. Alternatively, when the auxiliary target pressure state is reached, the on/off valve on the supply line is closed and the on/off valve on the supply line is closed and the measured value change amount of the pressure measurement sensor is calculated for a reference time, and the calculated measurement value If the amount of change is greater than or equal to a preset reference amount of change, it may be determined that there is a gas leak defect in the inspection object.

In addition, the control unit may control the operation of the compressed air supply unit so that compressed air is supplied in a corresponding pressure order according to a designation order of the main target pressure and the auxiliary target pressure input by the pressure setting unit.

In addition, the gas leak defect inspection system supplies compressed air in a specified order of the main target pressure and the auxiliary target pressure, and inputs the number of cycle repetitions for one inspection cycle to check for gas leak defects in each supply state. The repetition number setting unit may further include, and the control unit may control the operation of the compressed air supply unit and the opening/closing valve so that the inspection cycle is repeatedly performed by the number of cycle repetitions input by the repetition number setting unit.

In addition, the control unit controls the operation of the compressed air supply unit and the on/off valve according to the inspection cycle, and when it is determined that any one of a plurality of inspection objects has a gas leak defect in the process of the inspection cycle, the inspection object is It is possible to control the operation so that the on-off valve of the connected supply line is closed and the inspection cycle is continuously performed on the remaining inspection object while the on-off valve is closed.

In addition, the compressed air supply unit may include an air supply module generating and supplying the compressed air in an intermediate pressure state lower than the main target pressure or the auxiliary target pressure; A first regulator disposed downstream of the air supply module to allow the compressed air supplied by the air supply module to pass therethrough, to constantly adjust the pressure of the compressed air to the intermediate pressure state; And a pressure boosting module that receives compressed air that has passed through the first regulator, increases the pressure to the main target pressure or the auxiliary target pressure, and supplies the compressed air to the multi-manifold.

In addition, the pressure increasing module may include: an air booster receiving the compressed air of the intermediate pressure state that has passed through the first regulator and increasing the pressure of the supplied compressed air to the main target pressure or the auxiliary target pressure; A second air tank for receiving and storing compressed air increased by the air booster; And a second regulator disposed downstream of the second air tank so that compressed air stored in the second air tank is supplied and passed therethrough, and constantly adjusts the pressure of the compressed air to the state of the main target pressure or the auxiliary target pressure. I can.

According to the present invention, by forming a structure in which compressed air is supplied to the object to be inspected but does not recover it again, a plurality of inspection objects can be connected in parallel through a multi-manifold, so that gas leaks to a plurality of inspection objects during one inspection operation. It has the effect of being able to simultaneously inspect for defects.

In addition, by installing a temperature-humidity sensor that can detect the temperature and humidity of the compressed air supplied to the inspection object, considering the measured value of the temperature-humidity sensor, whether the pressure change by the pressure measurement sensor is affected by temperature and humidity or gas leak defects. As a result, it is possible to verify whether it is caused by a defect, and through this, there is an effect of correcting or verifying the result of determining whether a gas leak is defective for the inspection object.

In addition, by providing a pressure-increasing module capable of increasing the pressure of compressed air supplied to the object to be inspected, and selectively supplying the increased compressed air to the object to be inspected, compressed air of different supply pressures is supplied through one equipment. It can be supplied to the inspection object, and accordingly, there is an effect that it can be applied to all inspection objects having various specifications.

In addition, when testing gas leaks on an object to be inspected, it is possible to perform the inspection in multiple target pressure states in consideration of the use environment of the object to be inspected rather than performing the inspection operation under a single target pressure state, enabling more accurate inspection. By specifying the order of pressure, it is possible to smoothly supply compressed air under multiple target pressures, and it is possible to more accurately simulate the actual use environment of the inspection object, thereby improving the accuracy of the gas leak test result. It works.

In addition, there is an effect of further improving inspection accuracy by repeatedly automatically performing one inspection cycle for inspection under a plurality of target pressure states.

In addition, multiple inspection objects can be inspected at the same time, and even if a gas leak defect is determined for any one inspection object, the remaining inspection objects can be continuously inspected, making inspection work for multiple inspection objects faster. There is an effect that can be performed.

1 is a view schematically showing the overall configuration of a gas leak defect inspection system according to an embodiment of the present invention;

2 is a functional block diagram functionally showing a control-related configuration of the gas leak defect inspection system according to an embodiment of the present invention;

3 is a diagram illustrating a pressure setting state through a pressure setting unit of a gas leak defect inspection system according to an embodiment of the present invention;

4 is a view schematically showing the overall configuration including a compressed air supply unit of the gas leak defect inspection system according to an embodiment of the present invention;

5 is a view schematically showing the overall configuration including a compressed air supply unit of the gas leak defect inspection system according to another embodiment of the present invention;

6 and 7 are diagrams illustrating a state of compressed air flow in the gas leak defect inspection system shown in FIG. 5 step by step.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to elements of each drawing, it should be noted that the same elements have the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a view schematically showing the overall configuration of a gas leak defect inspection system according to an embodiment of the present invention, Figure 2 is a functional configuration related to the control of the gas leak defect inspection system according to an embodiment of the present invention FIG. 3 is a functional block diagram illustrating a pressure setting state through a pressure setting unit of a gas leak defect inspection system according to an exemplary embodiment of the present invention.

A gas leak defect inspection system according to an embodiment of the present invention connects an inspection object 10 having a gas flow path for supplying gas such as a gas facility or a cooling facility to inspect whether a gas leak defect for the inspection object 10 As a system, it is possible to perform the inspection work of the inspection object 10 by supplying high-pressure compressed air, and the inspection operation can be performed under the same pressure as the actual working pressure of the inspection object. Such a gas leak defect inspection system is mounted on a compressed air supply unit (SP), a multi-manifold 300, a plurality of supply lines 400 connected to the multi-manifold 300, and a supply line 400. It is configured to include an on-off valve 500, a pressure measurement sensor 600, a pressure setting unit 710 for setting and inputting a target pressure, and a control unit 700.

The compressed air supply unit SP is a device for generating and supplying compressed air, and is operated and controlled by the control unit 700 to supply compressed air in a target pressure state set and input by the pressure setting unit 710. The compressed air supply unit SP stably maintains compressed air in a target pressure state and supplies it to the multi-manifold 300.

The multi-manifold 300 is formed such that compressed air of a target pressure state supplied through the compressed air supply unit SP is introduced and the introduced compressed air is discharged through a plurality of discharge ports 320. In this multi-manifold 300, one inlet port 310 is formed so that compressed air that has passed through the first regulator 200 is introduced, and a plurality of discharge ports 320 through which compressed air is discharged are formed.

The supply line 400 is formed such that one end is coupled to the discharge port 320 of the multi-manifold 300 and the other end is connected to the inspection object 10. A plurality of supply lines 400 are provided and are connected to the plurality of discharge ports 320 of the multi-manifold 300, respectively, and the inspection object 10 is connected to each supply line 400.

The supply line 400 is equipped with an on-off valve 500 capable of opening and closing the flow path of the supply line 400, and a pressure measurement sensor 600 capable of measuring the internal pressure of the supply line 400. . The pressure measurement sensors 600 are respectively connected to a point downstream from the position of the on/off valve 500 on the supply line 400. In addition, the supply line 400 may be equipped with a temperature/humidity sensor 610 capable of measuring the temperature and humidity of compressed air flowing through the internal flow path of the supply line 400.

The pressure setting unit 710 is operable by a user to input a target pressure for compressed air, and includes at least one main target pressure for compressed air and an auxiliary target pressure different from the main target pressure. It is formed to be able to input. The main target pressure means the rated pressure applied to the inspection object 10, and the auxiliary target pressure means various working pressures used in the actual environment of the inspection object 10, and such main target pressure and auxiliary target pressure are user It can be set in various ways according to the needs of.

For example, as shown in FIG. 3, when the rated gas pressure supplied to the inspection object 10 is 10 bar, the main target pressure may be set to 10 bar, and the actual working pressure of the inspection object 10 is If it changes to 5bar, 6bar, 8bar, 12bar, etc., the auxiliary target pressure can be set and input as 5bar, 6bar, 8bar, 12bar, etc.

The control unit 700 includes a compressed air supply unit (SP) and an opening/closing valve 500 so that compressed air in the state of the main target pressure and the auxiliary target pressure is supplied to the object 10, respectively, according to an input signal from the pressure setting unit 710. Control the operation of In a state in which compressed air is supplied to the inspection object 10 in the state of the main target pressure and the auxiliary target pressure, the control unit 700 receives and applies the measured values of the plurality of pressure measurement sensors 600 for each supply state. It is determined whether or not there is a gas leak defect in the inspection object 10 connected to each supply line 400 based on the amount of change over time of the received measured value.

Looking more closely at the process of determining whether a gas leak is defective by the control unit 700, the control unit 700 opens and closes until the measured value of the pressure measurement sensor 600 reaches a set target pressure (main target pressure or auxiliary target pressure). When the valve 500 is opened and the measured value of the pressure measurement sensor 600 reaches a target pressure state, the on/off valve 500 is closed. Thereafter, in a state in which the on/off valve 500 is closed, the measured value change amount of the pressure measurement sensor 600 is calculated for a reference time, and if the calculated measured value change amount is more than a preset reference change amount, the object 10 It is determined that there is a gas leak defect.

That is, the compressed air supplied by the compressed air supply unit SP is constantly maintained at a target pressure state and introduced into the multi-manifold 300. The compressed air introduced into the multi-manifold 300 is supplied to the plurality of inspection objects 10 through the plurality of discharge ports 320 and the supply line 400, respectively. In the process of supplying compressed air to the inspection object 10 through the supply line 400, the opening/closing valve 500 is opened, and when the compressed air is supplied and charged to the internal gas flow path of the inspection object 10, the supply line ( The internal flow path of 400) is also filled with compressed air to achieve a target pressure state. When this target pressure state is measured by the pressure measurement sensor 600, the on-off valve 500 is closed and maintained in this state for a reference time. As described above, when the object 10 is filled with compressed air at the target pressure, if there is no gas leak defect in the object 10, the target pressure is maintained as it is, but there is a gas leak defect in the object 10 If gas leakage occurs, the target pressure cannot be maintained as it is and a pressure drop occurs. Since the pressure change state is all measured by the pressure measurement sensor 600, if the pressure change amount measured by the pressure measurement sensor 600 is greater than or equal to the reference change amount, it is determined that there is a gas leak defect in the inspection object 10.

At this time, since the pressure of the compressed air may naturally change according to the temperature and humidity of the compressed air, a temperature and humidity sensor 610 capable of measuring the temperature and humidity of the compressed air is installed in the supply line 400, and the controller 700 ) Is applied to the measured value of the temperature and humidity sensor 610, in consideration of the measured value of the applied temperature and humidity sensor 610, whether the pressure change by the pressure measurement sensor 600 is affected by temperature and humidity or due to a gas leak defect Whether or not it may be determined, and through this, the result of determining whether a gas leak defect for the object 10 is corrected or verified.

In addition, in the gas leak defect inspection system according to an embodiment of the present invention, a plurality of discharge ports 320 are formed in the multi-manifold 300, and the supply lines 400 are connected to each of the discharge ports 320. In addition, since the inspection object 10 is connected to each of the supply lines 400, it is possible to simultaneously determine whether a gas leak defect for the plurality of inspection objects 10 is performed in one inspection operation. In particular, by forming a structure in which compressed air is supplied to the inspection object 10 but does not recover it again, a plurality of inspection objects 10 can be connected in parallel through the multi-manifold 300. The inspection object 10 can be simultaneously inspected.

Meanwhile, in the process of setting the target pressure by the pressure setting unit 710, as shown in FIG. 3, when the rated gas pressure supplied to the inspection object 10 is 10 bar, the main target pressure may be set to 10 bar and input. , The auxiliary target pressure may be set and input as 5bar, 6bar, 8bar, 12bar, etc. In this case, an order of the main target pressure and the auxiliary target pressure may be designated, and the inspection is performed in each target pressure state according to the designated order.

For example, when the rated gas pressure is 10 bar, the setting and sequence of the main target pressure and the auxiliary target pressure may be designated to perform the inspection in a state of 5 bar, 6 bar, 8 bar, 10 bar, 12 bar, and finally 10 bar again. The controller 700 may operate and control the compressed air supply unit SP so that compressed air is supplied in a corresponding pressure state according to the order of designating the main target pressure and the auxiliary target pressure input by the pressure setting unit 710.

In addition, assuming that the process of supplying compressed air in the specified order of the main target pressure and the auxiliary target pressure and inspecting for gas leak defects in each supply state is referred to as one inspection cycle, the number of cycles repeated for these inspection cycles An input repetition number setting unit 720 may be provided, and the control unit 700 includes a compressed air supply unit (SP) and opening/closing so that the inspection cycle is repeatedly performed by the number of cycle repetitions input by the repetition number setting unit 720 The valve 500 can be operated and controlled.

For example, as shown in FIG. 3, the inspection cycle of 6 steps (5bar, 6bar, 8bar, 10bar, 12bar, 10bar) may be repeated three times to perform the inspection operation.

At this time, it is preferable that the input target pressure is set to have a pressure value that increases sequentially. Unlike this, the target pressure value may be set to alternately increase and decrease, and when the target pressure value decreases, compressed air Compressed air of a corresponding pressure may be supplied by discharging compressed air through the supply unit SP. In this case, it may be controlled to perform a process of discharging compressed air through the regulators 200 and 830 of the compressed air supply unit SP, which will be described later.

In addition, the control unit 700 controls the operation of the compressed air supply unit (SP) and the on/off valve 500 according to the inspection cycle, and there is a gas leak defect in any one of the plurality of inspection objects 10 in the process of the inspection cycle. When it is determined that the inspection object 10 is connected to the supply line 400, the on-off valve 500 is closed and the inspection cycle for the remaining inspection object 10 with the corresponding on-off valve 500 closed. You can control the operation so that it continues to be performed.

According to this configuration, the gas leak defect inspection system according to an embodiment of the present invention does not perform an inspection operation under a single target pressure state when a gas leak inspection of the inspection object 10 is performed, but the use of the inspection object 10 In consideration of the environment, it is possible to perform the inspection under a plurality of target pressure conditions, thereby enabling more accurate inspection. In addition, the order of target pressures can be specified, so that the compressed air supply for a plurality of target pressure states can be smoothly performed, and the actual use environment for the inspection object 10 can be more accurately simulated. Accuracy can be improved.

In addition, it is possible to simultaneously inspect a plurality of inspection targets 10, and even if any one of the inspection targets 10 is determined to be defective, it is possible to continuously inspect the remaining objects to be inspected 10, thereby further improving the inspection work. It can be done quickly.

Next, a more detailed look at the compressed air supply structure through the compressed air supply unit (SP).

4 is a view schematically showing the overall configuration including the compressed air supply unit of the gas leak defect inspection system according to an embodiment of the present invention.

The compressed air supply unit SP according to an embodiment of the present invention may include an air supply module 100 and a first regulator 200 as shown in FIG. 4.

The air supply module 100 is a device for generating and supplying compressed air in a target pressure state, and an air compressor 110 that compresses and supplies air and receives and stores compressed air from the air compressor 110 and stores the stored compressed air. A first air tank 120 to which a connection line L is coupled to one side to be supplied to the first regulator 200, an air filter 130 mounted on the connection line L to filter compressed air, and a connection line It may be configured to include an air dryer 140 mounted on (L) to remove moisture from compressed air. The air filter 130 may be disposed at the upstream and downstream points of the air dryer 140, respectively, and may be formed to filter foreign substances and moisture contained in compressed air.

Compressed air generated by the air compressor 110 is stored in the first air tank 120 to maintain a stable pressure and flow, and in a state in which pressure and flow are stabilized in the first air tank 120, the connection line ( It is supplied to the first regulator 200 through L). An air filter 130 and an air dryer 140 are mounted on the connection line L to be supplied to the first regulator 200 in a state in which moisture and foreign substances are removed from the compressed air.

The first regulator 200 is disposed downstream of the air supply module 100 so that the compressed air supplied by the air supply module 100 passes, and adjusts the pressure of the compressed air to a target pressure state. The first regulator 200 may be applied with a general pressure regulator, and the general pressure regulator performs a function of adjusting the pressure so that the fluid flowing in a state in which the pressure value is slightly changed is stably maintained at a set pressure state. As such, detailed descriptions thereof will be omitted.

Compressed air that has passed through the first regulator 200 and stably maintained in a target pressure state is introduced into the multi-manifold 300 and is supplied to the plurality of inspection objects 10.

5 is a view schematically showing the overall configuration including the compressed air supply unit of the gas leak defect inspection system according to another embodiment of the present invention, FIGS. 6 and 7 are the gas leak defect inspection shown in FIG. It is a diagram showing the state of the compressed air flow of the system step by step.

Compressed air supply unit (SP) according to another embodiment of the present invention, as shown in Figure 5, including the air supply module 100, the first regulator 200, and a pressure increase module 800 Can be configured.

The air supply module 100 and the first regulator 200 may be applied in the same manner as the configuration described in FIG. 4, but in the air supply module 100, an intermediate pressure lower than the target pressure input to the pressure setting unit 710 Compressed air is generated and supplied in a state, and the first regulator 200 supplies the compressed air to the pressure boosting module 800 by stably maintaining the compressed air at an intermediate pressure state.

The pressure boosting module 800 is configured to receive compressed air in an intermediate pressure state that has passed through the first regulator 200 and boosts the pressure to a target pressure state, and supplies compressed air in an intermediate pressure state that has passed through the first regulator 200. An air booster 810 that is supplied with and increases the pressure of the supplied compressed air higher than a target pressure, a second air tank 820 that receives and stores the compressed air increased by the air booster 810, and 2 A configuration including a second regulator 830 disposed downstream of the second air tank 820 so that the compressed air stored in the air tank 820 is supplied and passed therethrough, and constantly adjusts the pressure of the compressed air to the target pressure state. Can be.

According to this configuration, the compressed air having an intermediate pressure that has passed through the first regulator 200 passes through the air booster 810, the second air tank 820, and the second regulator 830 in sequence, and increases the pressure to the target pressure state. Can be. The compressed air increased by the air booster 810 is temporarily stored in the second air tank 820 and passed through the second regulator 830 in a stabilized state and is adjusted to the target pressure state, so that the pressure state of the compressed air is adjusted to the target pressure. It can be kept more stable in the state.

In this way, the compressed air that has been increased to the target pressure through the pressure increase module 800 is introduced into the multi-manifold 300 and is supplied to the plurality of inspection objects 10.

At this time, a separate intermediate manifold 350 having two inlet ports 351 and one discharge port 352 formed on the upstream side of the multi-manifold 300 may be provided, passing through the first regulator 200 Compressed air in an intermediate pressure state and compressed air in a target pressure state that has passed through the intensification module 800 are respectively introduced into the intermediate manifold 350 through two inlet ports 351, and one discharge port 352 It may be configured to be discharged through and introduced into the multi-manifold 300. Since the intermediate manifold 350 is provided as described above, only one inlet port 310 may be formed in the multi-manifold 300.

The control unit 700 is a connection line so that the compressed air in the intermediate pressure state that has passed through the first regulator 200 and the compressed air in the target pressure state that has passed through the intensifying module 800 are sequentially supplied to the multi-manifold 300 ( L) to control the operation of the on-off valve 500 on the upper part, and also receive the measurement value of the pressure measurement sensor 600, the inspection object connected to the supply line 400 based on the amount of change over time of the applied measurement value ( 10) Determine whether there is a gas leak defect.

Looking more closely, the connection line L connected to the outlet end of the first regulator 200 is branched into two in the middle section, one extending toward the multi-manifold 300 and the other extending toward the booster module 800. , On/off valves 500 are mounted on the two branch lines, respectively. The two branch lines are respectively connected to the inlet ports 351 of the intermediate manifold 350 so that compressed air passes through the intermediate manifold 350 and flows into the multi-manifold 300. In addition, a three-port fitting member 910 having three separate ports formed on an upstream side of a branch branched by two branch lines is mounted on the connection line L connected to the outlet end of the first regulator 200, Two ports of the 3-port fitting member 910 are coupled with a connection line (L), respectively, and a separate pressure measurement sensor 600 is mounted to one port to prevent compressed air passing through the first regulator 200. Whether the pressure is in the medium pressure state can be detected.

The control unit 700 sequentially opens and operates the on-off valves 500 mounted on each of the two branch lines, so that the compressed air in the intermediate pressure state and the compressed air in the target pressure state are sequentially supplied to the multi-manifold 300. can do.

That is, first, the on-off valve 500 mounted on the branch line connected to the first regulator 200 is opened and operated, and the on-off valve 500 mounted on the branch line connected to the pressure booster module 800 is closed. When operated, as shown in FIG. 6, compressed air in an intermediate pressure state that has passed through the first regulator 200 flows into the multi-manifold 300 through the intermediate manifold 350 and follows the supply line 400. It is supplied to the inspection object 10. At this time, the on-off valve 500 mounted on the supply line 400 is continuously maintained in an open state. Thereafter, when the on-off valve 500 mounted on the branch line connected to the first regulator 200 is closed and the on-off valve 500 mounted on the branch line connected to the pressure boosting module 800 is opened and operated , As shown in FIG. 7, compressed air in a target pressure state that has passed through the intensifying module 800 is introduced into the multi-manifold 300 through the intermediate manifold 350, and the inspection object ( 10).

According to this operation process, compressed air having a relatively low pressure intermediate pressure state is first supplied to the object 10 to be inspected, and then compressed air having a target pressure state having a relatively high pressure (final supply pressure) is sequentially supplied. .

That is, the compressed air supplied by the air supply module 100 is stabilized in an intermediate pressure state through the first regulator 200 and is primarily supplied to the inspection object 10, and thereafter, the first regulator 200 and The pressure is increased to a target pressure state through the pressure increasing module 800 and is secondaryly supplied to the inspection object 10.

At this time, the control unit 700 opens and operates the on-off valve 500 on the supply line 400 until the measured value of the pressure measurement sensor 600 mounted on the supply line 400 reaches a target pressure state, and When the measured value of the measurement sensor 600 reaches the target pressure state, the on-off valve 500 is closed. Thereafter, in a state in which the on/off valve 500 is closed, the measured value change amount of the pressure measurement sensor 600 is calculated for a reference time, and if the calculated measured value change amount is more than a preset reference change amount, the object 10 It is determined that there is a gas leak defect.

According to this configuration, the gas leak defect inspection system according to an embodiment of the present invention sequentially supplies compressed air in a low-pressure state and compressed air in a high-pressure state through two stages of compressed air. In the process of supplying compressed air of high pressure to ), it is possible to prevent damage due to pressure shock to the inspection object 10.

That is, when the pressure of the compressed air required for inspection of the inspection object 10 is a relatively high high pressure (target pressure), the target pressure state to the inspection object 10 in the process of supplying compressed air to the inspection object 10 When the compressed air in the (high pressure state) is supplied from the beginning, damage to the inspection object 10 may occur due to the impact of the high pressure compressed air. In an embodiment of the present invention, as described above, for an initial predetermined time Compressed air having a low pressure intermediate pressure state is supplied to the object 10 to be inspected, and then, compressed air having a target pressure state having a relatively high pressure is sequentially supplied to the object 10 to be inspected. ) Can prevent pressure shock damage.

At this time, the air compressor 110 of the air supply module 100 may be applied with a capacity capable of compressing and supplying air at an intermediate pressure lower than the target pressure. As such, the air compressor 110 is in a relatively low pressure state. Even if applied as a pressure capacity, compressed air can be increased and supplied to a target pressure state, which is a relatively high pressure state, through the pressure boosting module 800, and in particular, the air compressor 110 is supplied with an intermediate pressure capacity that is a relatively low pressure state. By applying, the size of the air compressor 110 can be downsized, and thus the overall system can be downsized and transported easily, so that the inspection object 10 can be inspected on-site in the actual field.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (9)

1. In the gas leak defect inspection system for inspecting whether a gas leak defect in the inspection object by connecting an inspection object having a gas flow path,

   An air supply module for supplying compressed air;

   A first regulator disposed downstream of the air supply module to allow the compressed air supplied by the air supply module to pass therethrough to constantly adjust the pressure of the compressed air to a first reference pressure state;

   A multi-manifold in which one inlet port is formed so that the compressed air passing through the first regulator is introduced into the interior, and a plurality of discharge ports are formed so that the compressed air introduced into the interior is discharged;

   A plurality of supply lines having one end connected to a plurality of discharge ports of the multi-manifold and the other end connected to the inspection object;

   An on-off valve mounted on each of the plurality of supply lines;

   A pressure measuring sensor connected to a point downstream of the position of the on/off valve on the plurality of supply lines to measure internal pressures of the plurality of supply lines, respectively; And

   A control unit that controls the operation of the air supply module and the on/off valve

   Including, wherein the control unit receives the measured values of the plurality of pressure measurement sensors, based on the amount of change over time of the applied measured values, each gas leakage defect for a plurality of inspection objects connected to a plurality of supply lines, respectively. Gas leak defect inspection system, characterized in that to determine whether or not.
2. The method of claim 1,

   The control unit

   The on-off valve is opened and operated until the measured value of the pressure measuring sensor reaches the first reference pressure state, and when the measured value of the pressure measuring sensor reaches the first reference pressure state, the on-off valve is closed and operated. ,

   In a state in which the on/off valve is closed, the measured value change amount of the pressure measurement sensor is calculated for a reference time, and if the calculated measured value change amount is more than a preset reference change amount, it is determined that there is a gas leakage defect for the inspection object. Gas leak defect inspection system, characterized in that.
3. In the gas leak defect inspection system for inspecting whether a gas leak defect in the inspection object by connecting an inspection object having a gas flow path,

   A compressed air supply unit generating and supplying compressed air;

   A multi-manifold in which one inlet port is formed so that the compressed air supplied by the compressed air supply unit is introduced, and a plurality of discharge ports are formed so that the compressed air introduced into the inside is discharged;

   A plurality of supply lines having one end connected to a plurality of discharge ports of the multi-manifold and the other end connected to the inspection object;

   An on-off valve mounted on each of the plurality of supply lines;

   A pressure measuring sensor connected to a point downstream of the position of the on/off valve on the plurality of supply lines to measure internal pressures of the plurality of supply lines, respectively;

   A pressure setting unit configured to input at least one main target pressure for the compressed air and at least one auxiliary target pressure different from the main target pressure; And

   A control unit for controlling the operation of the compressed air supply unit and the opening/closing valve so that compressed air in the state of the main target pressure and the auxiliary target pressure is supplied to the inspection object according to an input signal of the pressure setting unit

   Including, wherein the control unit is in a state in which compressed air is supplied to the test object in the state of the main target pressure and the auxiliary target pressure, and receives the measured values of the plurality of pressure measurement sensors for each supply state, and the applied measurement A gas leak defect inspection system, characterized in that it is determined whether or not each of the plurality of inspection objects connected to the plurality of supply lines has a gas leak defect based on a change amount of the value over time.
4. The method of claim 3,

   The control unit

   Opening and operating the on-off valve on the supply line until the measured value of the pressure measurement sensor becomes the main target pressure or the auxiliary target pressure state, and the measured value of the pressure measuring sensor is the main target pressure or the auxiliary target pressure state. If it is, the on-off valve on the supply line is closed and operated,

   In a state in which the on/off valve on the supply line is closed, the measured value change amount of the pressure measurement sensor is calculated for a reference time, and if the calculated measured value change amount is more than a preset reference change amount, there is a gas leakage defect for the inspection object. Gas leak defect inspection system, characterized in that determined to be.
5. The method of claim 4,

   The control unit controls the operation of the compressed air supply unit to supply compressed air in a corresponding pressure order according to a designation sequence of the main target pressure and the auxiliary target pressure input by the pressure setting unit. .
6. The method of claim 5,

   Further comprising a repetition number setting unit for supplying compressed air in a specified order of the main target pressure and the auxiliary target pressure, and inputting the number of repetitions of the cycle for one inspection cycle for inspecting for gas leak defects in each supply state,

   The control unit controls the operation of the compressed air supply unit and the on/off valve so that the inspection cycle is repeatedly performed by the number of cycle repetitions input by the repetition number setting unit.
7. The method of claim 6,

   The control unit

   The compressed air supply unit and the on/off valve are operated according to the inspection cycle, and if it is determined that any one of a plurality of inspection objects has a gas leak defect in the process of the inspection cycle, the supply line to which the inspection object is connected The gas leak defect inspection system, characterized in that the operation is controlled so that the on-off valve is closed and the inspection cycle is continuously performed on the remaining inspection object while the corresponding on-off valve is closed.
8. The method according to any one of claims 3 to 7,

   The compressed air supply unit

   An air supply module generating and supplying the compressed air at an intermediate pressure lower than the main target pressure or the auxiliary target pressure;

   A first regulator disposed downstream of the air supply module to allow the compressed air supplied by the air supply module to pass therethrough, to constantly adjust the pressure of the compressed air to the intermediate pressure state; And

   A pressure boosting module that receives compressed air that has passed through the first regulator, increases the pressure to the main target pressure or auxiliary target pressure, and supplies it to the multi-manifold

   Gas leak defect inspection system comprising a.
9. The method of claim 8,

   The booster module is

   An air booster receiving the compressed air of the intermediate pressure state that has passed through the first regulator and increasing the pressure of the supplied compressed air to the main target pressure or the auxiliary target pressure;

   A second air tank for receiving and storing compressed air increased by the air booster; And

   A second regulator disposed downstream of the second air tank so that the compressed air stored in the second air tank is supplied and passed therethrough, so as to constantly adjust the pressure of the compressed air to the state of the main target pressure or the auxiliary target pressure.

   Gas leak defect inspection system comprising a.

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