KR100974400B1 - Apparatus for testing vacuum leak of sealed product - Google Patents

Abstract

The present invention relates to a vacuum leak test apparatus, which enables monitoring and user manipulation of a test process through a display unit, outputs a result of unsatisfactory determination of leakage of a measured object in real time, and conveniently stores test information externally. By allowing the device to be stored in the device, even a non-skilled person can perform a vacuum leak test on a closed container stably and easily, and can determine the production stability and reliability of the measured object in real time, It provides a vacuum leak test apparatus that can expand the scope of application by using the database of information about the database.

Description

Apparatus for Testing Vacuum Leak of Sealed Product}

The present invention relates to a vacuum leak test apparatus. In more detail, the display unit enables monitoring and user manipulation of the test process, outputs the result of the determination of leakage of the measured object in real time, and conveniently stores the test information in an external storage device. Even non-skilled personnel can carry out the vacuum leak test on hermetically sealed containers stably and easily, determine the production stability and reliability of the measured objects in real time, and use the information on various measured objects as a database. The present invention relates to a vacuum leak test apparatus that can further expand its application range.

In general, processed products or castings, which are widely used in various industries such as various mechanical parts or containers, have to have airtightness of the internal space depending on their functions. Such closed products have fine cracks in the manufacturing process due to their structural characteristics. As a cause, the confidentiality of the internal space may be released, and a leak may occur in the product, so the reliability test for this will be very important.

This test is generally performed by applying a vacuum pressure to the vacuum chamber through an external device and placing a measurement object in a vacuum chamber of a predetermined size, which is isolated from the outside. This is generally done via a vacuum leak test apparatus having a vacuum chamber, a vacuum pressure device and the like. That is, when the change state of the vacuum pressure inside the vacuum chamber is kept constant while the vacuum pressure of the predetermined size is maintained in the vacuum chamber for a predetermined time, it may be determined that no leakage occurs in the object to be measured. It can be determined that leakage occurs in the measured object when the change in the vacuum pressure of the gas increases with time.

In this case, if the size or shape of the object to be measured is very large or complex, it may not be possible to place it inside the vacuum chamber, in which case another vacuum leak including a separate vacuum chamber applicable to the object to be measured. Additional test equipment must be customized and tested. In this regard, the vacuum leak test apparatus according to the prior art has a problem that its application range is greatly limited by the size or shape of the vacuum chamber.

In addition, in a test method of detecting a change in vacuum pressure inside the vacuum chamber while applying a vacuum pressure to the vacuum chamber, excessive vacuum pressure may act on the inside of the vacuum chamber depending on the characteristics of the object or the test conditions. Deformation may occur such that the durability of the test apparatus may be degraded, or the sealing state of the vacuum chamber may not be maintained well, thereby causing an error in the test result. Therefore, in order to prevent this, the amount of vacuum pressure that can be applied to the vacuum chamber must also be limited within a certain range, which also acts as a limiting factor of the application range of the test apparatus.

The present invention is invented to solve the problems of the prior art, an object of the present invention is configured to selectively communicate with the connection pipe and the sensor pipe that can transmit the vacuum pressure to the internal space of the vacuum chamber or the object to be measured. In consideration of the structural characteristics of the object to be measured or the safety of the vacuum chamber, different types of vacuum limit tests can be performed as necessary, thereby enabling more accurate and stable test and In view of the possibility of testing for leaks, the present invention provides a vacuum leak test apparatus that can be expanded.

Another object of the present invention is to monitor the vacuum leak test process for a closed container in detail through the display unit, and to produce a display unit by the touch screen method, and in particular by configuring the output screen with enhanced user convenience, It is to provide a vacuum leak test apparatus that can perform a leak test stably and easily.

Another object of the present invention is to apply a vacuum pressure to the object to be measured and using the result of the measured vacuum pressure change, the control unit performs a good judgment on the occurrence of leakage of the measured object, and displays the result of the poor judgment performed by the controller By outputting to the user through the unit, it is to provide a vacuum leak test apparatus that allows the user to determine the production stability and reliability of the measured object in real time during the test process.

Still another object of the present invention is to provide a temporary storage unit for storing test results and a USB port for transferring it to an external storage device to conveniently store various measurement data for an object to be measured, and thus It is to provide a vacuum leak test apparatus that can expand the scope of application by using database of water information.

It is still another object of the present invention to provide a more accurate test result by accurately adjusting the pressure in the vacuum chamber or the pressure in the inner space of the object through the vacuum pressure control unit, while at the same time safe vacuum leak test that can prevent an accident risk. To provide a device.

The present invention provides a vacuum leak test apparatus for testing whether leakage occurs on an object by applying a vacuum pressure to the object to be measured and measuring a change in vacuum pressure, the body case having an accommodation space formed therein; A housing disposed inside the main body case and having a sealable vacuum chamber formed therein to allow the measurement object to be drawn in; A connection pipe and a sensor pipe connected to the housing so that a portion of the section is located in the vacuum chamber; A vacuum pressure adjusting unit coupled to one end of the connection pipe to generate and release a vacuum pressure; A pressure measuring sensor coupled to one end of the sensor pipe and measuring a pressure transmitted through the sensor pipe; A display unit mounted on one side of the main body case to display a measurement value by the pressure measuring sensor, and an input operation unit formed to allow a user to input input information; And a controller configured to control an operation of the vacuum pressure adjusting unit according to input information input by a user, and the other ends of the connection pipe and the sensor pipe may be selectively communicated with the internal space of the vacuum chamber or the object to be measured. It is configured to provide a vacuum leak test apparatus which can selectively apply a vacuum pressure to the inner space of the vacuum chamber or the object to be measured.

In this case, the display unit is manufactured by a touch screen method and includes a menu selection unit for allowing a user to select a function menu by a touch operation, and the input operation unit includes a new input window on the display screen of the display unit by a touch operation of the menu selection unit. It can be formed in an activated manner.

The controller may be configured to receive the measured value by the pressure measuring sensor to determine whether the leakage of the object to be measured is non-payment, and the display unit may be configured to display the result of the non-payment determination of the leakage of the object to be measured. .

The display unit may display the measured value by the pressure measuring sensor with respect to time in real time from the moment when the vacuum pressure is applied to the vacuum chamber or the inner space of the object to be measured through the vacuum pressure adjusting unit. .

The control unit may control the vacuum pressure adjusting unit to generate a set vacuum pressure and maintain the set vacuum pressure for a set time, and receive a measured value measured by the pressure measuring sensor and set the set pressure in an internal space of the vacuum chamber or the measured object. It may be configured to determine whether or not the leakage of the object to be measured on the basis of the pneumatic holding state or the set vacuum pressure arrival time.

The vacuum leak test apparatus may further include a temporary storage unit configured to store test information including a measured value measured by the pressure measuring sensor; And a USB port connected to the temporary storage unit to transmit data from the temporary storage unit to an external storage medium.

According to the present invention, it is configured to selectively connect the connection pipe and the sensor pipe that can transfer the vacuum pressure to the vacuum chamber or the internal space of the object to be measured in consideration of the structural characteristics of the object to be measured or the safety of the vacuum chamber, etc. Different types of vacuum lit tests can be carried out as needed, which allows for more accurate and stable tests and further tests for leaks on a wider range of objects. It is effective.

In addition, the vacuum leak test process of the sealed container can be monitored in detail through the display unit, and the display unit is manufactured by using a touch screen method, and the display screen is especially enhanced for user convenience. And there is an effect that can be easily performed.

In addition, by applying a vacuum pressure to the object to be measured, the controller performs a good judgment on the occurrence of leakage of the measured object by using the measured vacuum pressure change result, and outputs the good judgment result performed by the controller to the user through the display. Thus, the user can determine whether the production stability and reliability of the measured object in real time during the test process.

In addition, it has a temporary storage unit for storing test results and a USB port for transferring it to an external storage device to conveniently store various measurement data on an object to be measured, thereby providing information on various objects. It is effective to expand the scope of utilization by making it a database.

In addition, the vacuum pressure adjusting unit accurately adjusts the pressure inside the vacuum chamber or the pressure on the inside space of the object to be measured, thereby producing more accurate test results and at the same time preventing an accident risk.

1 is a perspective view illustrating a schematic external shape of a vacuum leak test apparatus according to an embodiment of the present invention;
2 is a cross-sectional view conceptually showing the overall configuration of a vacuum leak test apparatus according to an embodiment of the present invention;
3 is a cross-sectional view conceptually showing another embodiment of a vacuum leak test apparatus according to an embodiment of the present invention;
4 is a cross-sectional view conceptually showing another embodiment of a vacuum leak test apparatus according to an embodiment of the present invention;
5 is a functional block diagram of a vacuum leak test apparatus according to an embodiment of the present invention;
6 is a view showing an operation diagram for each component of the vacuum leak test apparatus according to an embodiment of the present invention;
7 is a diagram illustrating a pressure diagram and a displacement diagram measured by a vacuum leak test apparatus according to an exemplary embodiment of the present disclosure;
8 is a view schematically showing the configuration of a display unit of a vacuum leak test apparatus according to an embodiment of the present invention;
FIG. 9 is a diagram schematically illustrating a configuration of an input operation unit displayed on a display unit of a vacuum leak test apparatus according to an embodiment of the present disclosure.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

The vacuum leak test apparatus according to an embodiment of the present invention is a device for testing whether a leak occurs on an object to be measured by measuring a change state of the vacuum pressure after applying a vacuum pressure to an object to be measured as a closed product. It is a structure that can selectively apply two types of vacuum action methods by applying a vacuum pressure to the vacuum chamber or directly applying the vacuum pressure to the inner space of the object under the condition that the object to be measured is placed and fixed in the chamber. . In addition, the measured results are used to evaluate the safety and manufacturing reliability of the hermetic product, and to output the real-time test results for the vacuum pressure change and the evaluation results for the manufacturing reliability in a separate display means in real time.

The vacuum leak test apparatus includes a main body case 100, a housing 200 constituting the vacuum chamber C, and a connection pipe 440 and a sensor penetratingly coupled to the housing 200 so as to communicate with the vacuum chamber C. A vacuum pressure adjusting unit 400 in communication with the pipe 610, the connection pipe 440, and generating and releasing a vacuum pressure, a pressure measuring sensor 600 measuring the pressure transmitted through the sensor pipe 610, and The display unit 700 may display the measurement data in real time and enable a user input operation, and a controller 800 for controlling an operation of the vacuum pressure adjusting unit 400 or the like.

The main body case 100 forms a basic appearance and structure of the entire apparatus, and an accommodation space is formed therein, and various components are mounted in the main body case 100. The shape of the main body case 100 may be formed in various forms according to a user's needs, and the display unit 700 may be mounted on one side of the main body case 100 in a position where the user's operation and recognition is easy.

The housing 200 may be integrally formed with the main body case 100 or may be separately formed in a form that is coupled to the inside of the main body case 100 as shown in FIG. The vacuum chamber C which can be drawn in is formed. The vacuum chamber (C) is formed to be sealed from the external space for maintaining the pressure because a high vacuum pressure is applied during the test process. For example, the housing 200 is formed in an open shape as shown in FIGS. 1 and 2, and an open top surface is provided so that the vacuum chamber C of the housing 200 can be rotated and opened. The housing door 210 may be hinged to be rotatable about the hinge shaft 213. At this time, it is preferable that a separate sealing member 212 is inserted between the housing door 210 and the housing 200 so that the vacuum chamber C can be sealed while the housing door 210 is closed. In addition, in order to enhance mutual adhesion between the housing door 210 and the housing 200, a separate coupling bolt 211 is mounted at an edge of the housing door 210, and a coupling bolt 211 is provided at an upper portion of the housing 200. Screw holes (not shown) are formed to correspond to each other. Therefore, when the housing door 210 is closed and the coupling bolt 211 is fastened to the housing 200 in a state where the object M is introduced into the vacuum chamber C, the housing door 210 is connected to the vacuum chamber C. ) Is kept in a sealed state from the external space and fixedly mounted, thereby maintaining structural safety even if a high vacuum pressure is applied to the vacuum chamber (C).

The connection pipe 440 and the sensor pipe 610 are coupled to the housing 200 so as to communicate with the vacuum chamber (C), wherein at least a portion or more of the connection pipe 440 and the sensor pipe 610 is a vacuum chamber ( C) is penetrated through the housing 200 to be located in C). That is, the connection pipe 440 and the sensor pipe 610 are coupled so that the interruption portion penetrates one side surface of the housing 200 as shown in FIG. 2 so that some sections protrude in the vacuum chamber C. In this case, the connection pipe 440 and the sensor pipe 610 is preferably formed of a flexible material so as to be able to move freely in the vacuum chamber (C). One end of the connection pipe 440 and the sensor pipe 610 located outside the vacuum chamber C is communicatively coupled to the vacuum pressure control unit 400 and the pressure measuring sensor 600 and positioned in the vacuum chamber C. The other end is configured to be in communication with the vacuum chamber (C) or alternatively one end is in communication with the vacuum pressure control unit 400 and the pressure measuring sensor 600, and the other end located in the vacuum chamber (C) is the object to be measured (M). It may be configured to communicate with the internal space of the).

Looking in more detail, the connection pipe 440 and the sensor pipe 610 is formed of a flexible material as described above is configured to be free to move, according to the connection pipe 440 and the sensor pipe as shown in FIG. 610 may be disposed in communication with the vacuum chamber (C), it may be coupled in communication with the internal space of the measurement object (M) in the vacuum chamber (C) as shown in FIG. In addition, as shown in FIG. 4, the connection pipe 440 and the sensor pipe 610 extend to the outer space of the vacuum chamber C, and the inner space of the measurement object M outside the vacuum chamber C. It may be coupled in communication, for this purpose it will be preferable that the length of the connection pipe 440 and the sensor pipe 610 is formed relatively long.

In this way, the connection pipe 440 and the sensor pipe 610 may be coupled to communicate with the internal space of the vacuum chamber (C) or the measurement object (M), wherein the connection pipe 440 and the sensor pipe 610 is When communicating with the vacuum chamber (C), as described above, a separate sealing member (P) is mounted at a portion where the connection pipe 440 and the sensor pipe 610 are coupled to the housing 200 through the vacuum chamber. The sealed state of (C) is maintained. However, when the connecting pipe 440 and the sensor pipe 610 communicates with the internal space of the measurement object M, a through hole (not shown) is formed in the measurement object M, and the connection pipe 440 and the sensor The pipe 610 is inserted into the through-hole and communicates with each other through the coupling. In this case, the inner space of the measurement object M must be kept sealed so that the other ends of the connection pipe 440 and the sensor pipe 610 are connected to each other. It is preferable that a separate sealing member P is coupled to seal the inner space of the measurement object M. Accordingly, the connection pipe 440 and the sensor pipe 610 are measured by the sealing member P only by inserting the connection pipe 440 and the sensor pipe 610 into the through hole of the object M. It can be coupled in communication with (M) while maintaining a sealed state.

The vacuum pressure control unit 400 is configured to generate and release a vacuum pressure, and is communicatively coupled to one end of the connection pipe 440 and configured to transmit a vacuum pressure to a specific space coupled to the other end of the connection pipe 440. . That is, when the vacuum chamber C is communicatively coupled to the other end of the connection pipe 440, the vacuum pressure generated by the vacuum pressure control unit 400 is transmitted to the vacuum chamber C and the other end of the connection pipe 440. When the internal space of the object to be measured (M) is communicatively coupled, the vacuum pressure generated by the vacuum pressure adjusting unit 400 is transmitted to the internal space of the object to be measured (M).

The vacuum pressure control unit 400 generates and maintains a vacuum pressure to apply a vacuum pressure to the internal space of the vacuum chamber C or the object M during the test process, and the vacuum chamber C when the test process is completed. Or by releasing the vacuum pressure acting on the internal space of the object under test (M). Since the vacuum pressure regulating performance of the vacuum pressure regulating unit 400 plays an important role in the reliability of the test result, the vacuum pressure regulating unit 400 is preferably configured such that the magnitude of the vacuum pressure and the vacuum pressure holding time are accurately controlled. .

FIG. 2 illustrates a usage mode in which the other ends of the connection pipe 440 and the sensor pipe 610 are connected to the vacuum chamber C. In detail, the vacuum pressure adjusting unit 400 is illustrated in FIG. 2. Compression pump 410 is connected to one end of the connection pipe 440 to provide a vacuum pressure lower than atmospheric pressure to the vacuum chamber (C), as shown in the connection pipe 440 is mounted on the connection pipe 440 The first on-off valve 420 for opening and closing the) and the second end for opening and closing the branch pipe 441 is mounted on the branch pipe 441, one end is connected to the connecting pipe 440, the other end is open in communication with the outside It is configured to include an on-off valve 430. At this time, it is preferable that a separate sealing member P is inserted into and mounted to the connection pipe 440 and the branch pipe 441 and the housing 200 to seal the vacuum chamber C.

In addition, the first on-off valve 420 and the second on-off valve 430 is preferably configured in the form of a solenoid valve electrically opened and closed for a more accurate operation, the first on-off valve 420 is always open type The second on-off valve 430 is configured as a normally closed type. According to this configuration, when the vacuum pump 410 is operated while the first opening / closing valve 420 is open and the second opening / closing valve 430 is closed, the vacuum pressure is transmitted through the connection pipe 440 to form a vacuum chamber. The vacuum pressure is generated in (C), and after the test is completed, the operation of the vacuum pump 410 is stopped and the first on-off valve 420 and the second on-off valve 430 are operated in an open state. Accordingly, the vacuum chamber C communicates with the outside through the branch pipe 441 to achieve the same atmospheric pressure as the outside, and the vacuum pressure of the vacuum pump 410 and the connection pipe 440 also causes the branch pipe 441. It communicates with the outside and achieves the initial atmospheric pressure. Meanwhile, even when the connection pipe 440 and the sensor pipe 610 are communicatively coupled to the internal space of the measurement object M, as shown in FIGS. 3 and 4, the operation state of the vacuum pressure control unit 400 is The operation is performed according to the operation state described above. However, in this case, since the vacuum pressure is applied to and released from the internal space of the object M instead of the vacuum chamber C, detailed description thereof will be omitted.

The opening / closing operation of the first opening / closing valve 420 and the second opening / closing valve 430 and the operation of the vacuum pump 410 are preferably controlled by the controller 800 so as to be opened and closed according to an electrical signal. According to the input information input by the control unit 800 is configured in a manner to control the operation of the vacuum pressure control unit 400, a detailed description thereof will be described later. In addition, the controller 800 not only controls the operation of the vacuum pressure control unit 400 but also transmits and receives electrical signals such as the pressure measuring sensor 600 and the display unit 700 which will be described later, as shown in FIGS. 2 and 5. And configured to control.

The display unit 700 is mounted on one side of the main body case 100 to display the measured value by the pressure measuring sensor 600, and the display unit 700 allows a user to input input information for a test. An input operation unit 730 is formed. A detailed description of the display unit 700 will be described later with reference to FIGS. 8 and 9.

The pressure measuring sensor 600 is coupled to one end of the sensor pipe 610 and configured to measure the pressure transmitted through the sensor pipe 610. When the vacuum chamber C is communicatively coupled to the other end of the sensor pipe 610, the internal pressure of the vacuum chamber C is transmitted through the sensor pipe 610, so that the pressure measuring sensor 600 is the pressure of the vacuum chamber C. When the internal space of the measurement object (M) is in communication communication with the other end of the sensor pipe 610 is transmitted to the pressure for the internal space of the measurement object (M) through the sensor pipe 610 pressure The measurement sensor 600 measures the pressure on the internal space of the object M.

According to this structure, the vacuum leak test apparatus according to the exemplary embodiment of the present invention selectively communicates an internal space of the vacuum chamber C or the object M to the other end of the connection pipe 440 and the sensor pipe 610. Since it can be combined, the vacuum leak test procedure can be selected by one of two methods. That is, the other end of the connection pipe 440 and the sensor pipe 610 is arranged to communicate with the vacuum chamber (C), and the measurement object (M) is placed in the vacuum chamber (C), and then the vacuum chamber (C) By determining the leakage of the object to be measured (M) by operating the vacuum pressure and measuring the vacuum pressure change state of the vacuum chamber (C) or avoiding the other ends of the connection pipe 440 and the sensor pipe 610. After coupling to communicate with the internal space of the measurement object (M), by applying a vacuum pressure to the internal space of the object to be measured (M) and measuring the change in the vacuum pressure with respect to the internal space of the object (M) It may be determined whether or not a leak occurs with respect to the measurement object M. Therefore, it is possible to perform a more accurate and stable test as needed, and to extend the scope of application of the test apparatus in that it is possible to test whether a leak occurs on a wider variety of objects. In addition, since the internal pressure of the vacuum chamber C or the pressure on the internal space of the measurement object M is measured in real time and output to the display unit 700, the test process may be monitored in real time.

Next, referring to the operation state of the vacuum leak test apparatus configured as described above according to the operation flow, first, as shown in FIG. 2, when the connection pipe 440 and the sensor pipe 610 are in communication with the vacuum chamber C, Open the housing door 210 to introduce the object M into the vacuum chamber C, close the housing door 210 and fasten the coupling bolt 211 to maintain the sealing state of the vacuum chamber C. do. Thereafter, the vacuum pressure control unit 400 is operated to apply a vacuum pressure to the vacuum chamber C, and when the target vacuum pressure is reached, the target vacuum pressure state is maintained for a certain time, and after a predetermined time, the vacuum pressure control unit 400 ) To release the vacuum pressure of the vacuum chamber (C). At this time, the internal vacuum pressure of the vacuum chamber (C) is transmitted to the pressure measuring sensor 600 through the sensor pipe 610, through which the internal pressure of the vacuum chamber (C) is measured. The internal pressure of the vacuum chamber C measured as described above is applied to the control unit 800 and then transmitted to the display unit 700 to be displayed on the display unit 700 in real time. This use mode is to apply a vacuum pressure to the outside of the measurement object (M), and the kind or shape size of the measurement object (M) is suitable to be introduced into the vacuum chamber (C) and is required for testing. The magnitude of the vacuum pressure may be applied when the structural safety of the vacuum chamber C is acceptable.

If the magnitude of the vacuum pressure required for the test is an unacceptably high degree of vacuum pressure due to the structural safety of the vacuum chamber C or the characteristic of the measurement object M may be introduced into the vacuum chamber C. If not, the use mode as shown in FIG. 2 cannot be applied. In this case, as shown in FIG. 3, the connection pipe 440 and the sensor pipe 610 are preferably communicated with the internal space of the measurement object M introduced into the vacuum chamber C. Therefore, before the test is performed, through-holes are formed in the object to be measured M, the measurement object M having the through-holes is opened and introduced into the vacuum chamber C by opening the housing door 210, and then the connection pipe 440. And inserting the other end of the sensor pipe 610 into the through hole of the object to be measured M so that the connection pipe 440 and the internal space of the sensor pipe 610 and the object M are connected in sealed communication. Thereafter, the process of performing the test proceeds to the process of releasing and maintaining the vacuum pressure in the internal space of the measurement object M through the vacuum pressure control unit 400 as described in FIG. 2. The pressure on the internal space of the measured object M measured by) is output to the display unit 700 in real time through the control unit 800. At this time, whether the vacuum chamber (C) is sealed during the test process is not important, and as shown in FIG. 3, the test may be performed while the housing door 210 is opened, and, if necessary, the housing door 210. ) May be performed in a sealed state of the vacuum chamber (C). This mode of use applies a vacuum pressure directly to the interior space of the object M, and as described above, the object M cannot be introduced into the vacuum chamber C or the vacuum chamber C May be applied when the safety of the device is a problem, and also when the leak is to be tested by using an internal vacuum pressure rather than an external vacuum pressure due to the structural characteristics of the object under test (M). will be.

In addition, when the size of the measured object M is large and the measured object M cannot be drawn into the vacuum chamber C or structural safety of the vacuum chamber C is a problem, as shown in FIG. 4. The test is performed by arranging the object to be measured outside the vacuum chamber C and extending the connecting pipe 440 and the sensor pipe 610 so as to communicate with the internal space of the object M. Can be. Since the test process is the same as described in FIG. 3, a detailed description thereof will be omitted.

As such, the vacuum leak test apparatus according to the exemplary embodiment may selectively connect the connection pipe 440 and the sensor pipe 610 to the internal space of the vacuum chamber C or the object M. As a result, a vacuum leak test for a more diverse measurement object M is possible.

Meanwhile, an operating state of each of these components is shown in FIG. 6. When the test process is divided into pressure change sections with respect to the internal space of the vacuum chamber C or the object M, as shown in FIG. 6. Vacuum pressure generation section in which the initial vacuum pressure is applied and the pressure decreases, and the pressure in the vacuum chamber (C) or the internal space of the object to be measured (M) maintains for a predetermined time as it reaches the set vacuum pressure. It can be divided into a maintenance section and a vacuum release section for releasing the vacuum pressure after a predetermined time. The pressure measuring sensor 600 operates to maintain the on state in all sections of the test procedure, and the vacuum pump 410 operates to be turned on only in the vacuum generating section at the beginning of the test as described above. In addition, the first on-off valve 420 is normally open to operate in a close state only in the vacuum pressure maintaining section, and the second on / off valve 430 is normally closed to operate in an open state only in the vacuum pressure release section. Through this operation, the aforementioned test process is completed.

FIG. 7 is a graph illustrating an example of the vacuum pressure line L measured by the pressure measuring sensor 600 through such a test process. If the test proceeds normally and no leakage occurs in the measured object M, FIG. In the vacuum pressure generating section, the pressure continues to decrease (AB), and in the vacuum maintaining section, the pressure is kept constant at the set vacuum pressure (BC), and in the vacuum pressure release section, the pressure increases rapidly and returns to the initial state of atmospheric pressure. Go through the process (CD). At this time, a process such as an A-B-F-D diagram or an A-E-G-D diagram may be indicated according to the use aspect of the test apparatus. For example, if the leakage occurs in the measurement object M during the test process while the connection pipe 440 and the sensor pipe 610 are coupled to communicate with the vacuum chamber (C), the pressure in the vacuum pressure generating section The change appears to be the same, and since the pressure increases due to the leakage of the measured object M in the vacuum pressure maintaining section, the vacuum pressure cannot be kept constant and the vacuum pressure increases along the BF diagram (ABFD). ). On the other hand, if the leakage occurs in the measurement object M in a state in which the connection pipe 440 and the sensor pipe 610 is in communication with the internal space of the measurement object M, the measurement object in the vacuum pressure generation section Due to the leakage of (M), the time to reach the set vacuum pressure becomes longer, so that the pressure change appears along the AE diagram, and the vacuum pressure increases to a certain degree due to the leakage occurring continuously in the vacuum pressure maintaining section. Pressure changes may appear (AEGD). This illustrates an exemplary situation, and various types of vacuum diagrams may appear depending on the degree of leakage or the time of leakage.

Therefore, unless the normal vacuum curve (ABCD) is shown, the measured object (M) may not leak the vacuum pressure during the vacuum test process, or may be leaked due to a minute crack or the like at the time of manufacture. Therefore, according to the measurement result, it is possible to determine whether or not the leakage of the object to be measured (M) to determine the manufacturing reliability of the leakage of the object to be measured (M).

The manufacturing reliability determination of the measurement object M is configured in such a manner that the control unit 800 calculates and performs measurement data according to an embodiment of the present invention. That is, the control unit 800 is configured to receive the measurement data by the pressure measuring sensor 600 and calculate it to determine whether the leakage of the leakage of the measured object (M). The determination operation is performed in a manner of determining whether the vacuum pressure change is normally performed in the entire test section as described above, and the result of the non-payment determination performed as described above is configured to be displayed on the display 700 after the test is completed.

For example, the controller 800 controls the vacuum pressure control unit 400 to generate a set vacuum pressure to be maintained for a set time, and receives a measurement value measured by the pressure measuring sensor 600 to receive a vacuum chamber C. Alternatively, it is possible to determine whether the leakage of the measured object is poor or not based on the set vacuum pressure maintaining state or the set vacuum pressure attainment time in the internal space of the object under test (M). That is, when the vacuum pressure control unit 400 is operated by the controller 800 as described above, the pressure to the internal space of the vacuum chamber (C) or the object to be measured (M) is input by the user after a predetermined time. The set vacuum state is reached and then maintained at the set vacuum state for the set time input by the user. In this case, when leakage occurs in the measurement target object M as described in FIG. 7, the set vacuum pressure arrival time becomes long in the vacuum pressure generation section or the internal pressure increases in the vacuum pressure maintenance section, thereby maintaining a constant vacuum pressure. Does not achieve. Accordingly, when the vacuum pressure change state different from the normal state is measured, it is determined by the controller 800 that leakage occurs in the object to be measured M, and the determination of the non-payment of the object to be measured M is displayed. It is transmitted to the unit 700 is configured to be output through the result display unit 740 to be described later.

In the above, the test method and configuration of the vacuum leak test apparatus according to an exemplary embodiment of the present invention have been mainly described. Hereinafter, the configuration and operation method of the display unit 700 and the control unit 800 will be described in more detail.

As shown in FIG. 8, the display unit 700 includes an output display unit 710, a menu selection unit 720, a result display unit 740, and a target value display unit on a display screen as shown in FIG. 8. 750, and the input operation unit 730 is displayed on the screen of the display unit 700 through a separate input window as shown in FIG. 9.

In this case, the menu selection unit 720 and the input operation unit 730, which are formed to be operated by the user, are configured separately from the display unit 700 by a separate screen or button, and the display unit 700 performs only an output display function. Alternatively, the display unit 700 may be manufactured in a touch screen manner so that the user may operate the menu selection unit 720 and the input operation unit 730 by a touch operation. It is preferable.

As shown in FIG. 8, the output display unit 710 is a pressure measuring sensor 600 from the moment the vacuum pressure is applied to the internal space of the vacuum chamber C or the object M through the vacuum pressure adjusting unit 400. And a graph display unit 711 for graphing the measured values by time and displaying them in real time, and a current vacuum pressure display unit 714 for textifying these measured values in real time. At this time, the graph display unit 711 is formed with a coordinate display unit 712 that displays a rectangular coordinate line in the area where the graph is displayed, the unit display unit for displaying each unit coordinate value of the rectangular coordinate line on the edge of the graph display unit 711 713 is formed. For example, if the unit display unit 713 displays time 0.5 sec, each unit coordinate value of the Cartesian coordinate line means 0.5 second time per line on the horizontal axis. In this case, each unit coordinate value is configured to be input or changed through a separate input operation unit 730, which will be described later.

As shown in FIG. 8, the result display unit 740 is preferably displayed in a separate area from the output display unit 710. Here, the result display unit 740 displays the result of the non-payment determination of the measured object M by the controller 800. . The display method may be configured in various ways such as using a color such as blue / red, or displaying a result of a judgment on the non-payment by using a symbol such as O / X, and as shown in FIG. It may also display the result of the determination of the good or bad.

The target value display unit 750 is also preferably displayed in a separate area from the output display unit 710, the set vacuum pressure display unit 751 for displaying the target vacuum pressure input through the input operation unit 730, and the input operation unit ( It may be configured to include a set time display unit 752 for displaying the vacuum pressure holding time input through the 730.

The menu selection unit 720 is configured to be touch-operated by the user, the start button unit 722 for enabling the start of the test process, the stop button unit 723 for enabling the stop of the test process, and an input. It may be configured to include a setting button unit 721 for activating the operation unit 730. Therefore, when the touch button operation 722 is touched, the test process is started in such a manner that the vacuum pressure is provided to the internal space of the vacuum chamber C or the object M through the vacuum pressure adjusting unit 400. When the touch button 723 is touched, the test process is stopped in such a manner that the vacuum pressure is released from the internal space of the vacuum chamber C or the object M through the vacuum pressure adjusting unit 400. When the touch button 721 is touched, a separate input window is activated on the display screen of the display 700, and an input manipulation unit 730 is formed.

As shown in FIG. 9, the activated input operation unit 730 includes a vacuum pressure setting unit 731 for setting a target vacuum pressure with respect to the pressure in the vacuum chamber C or the space under measurement M; A time setting unit 732 for setting a holding time of the target vacuum pressure, and a time scale setting unit 733 for setting a horizontal axis unit coordinate value with respect to the Cartesian coordinate line, and a cursor adjusting unit for moving the input cursor ( 735 and an enter button unit 736 which performs an input completion function and simultaneously inactivates an input window of the input operation unit 730 to be erased on the display screen. According to this configuration, the user moves the input cursor to the vacuum pressure setting unit 731 and the time setting unit 732, and then sets the target vacuum pressure and the time for maintaining the same by a numeric input method through the manipulation of the cursor adjusting unit 735. Can be. In addition, by variously setting the unit coordinate value for the time unit through the time scale setting unit 733, the overall scale for the vacuum graph can be adjusted as needed.

At this time, the time scale setting unit 733 is configured to input the time for the full scale. Accordingly, the unit coordinate value displayed on the unit display unit 713 is a time value input to the time scale setting unit 733 on the horizontal axis. The value divided by the total number of Cartesian coordinate lines is displayed. That is, if 20 minutes is input to the time scale setting unit 733 and the total number of the horizontal axis Cartesian coordinate lines is 30, the time unit coordinate value is (20 minutes (1200 seconds) / 30), so 40 seconds becomes the unit display unit ( 713 is displayed for 40 seconds with respect to the horizontal time unit coordinate value.

On the other hand, the vacuum leak test apparatus according to an embodiment of the present invention, the measurement value by the pressure measuring sensor 600 and the user's input information by the input operation unit 730 and the result of the non-payment judgment for the object to be measured (M) The temporary storage unit 900 may be configured to further store test information of the temporary storage unit 900. The temporary storage unit 900 may be configured to communicate with the control unit 800 and to transmit and receive information. In addition, a separate USB port 910 connected to the temporary storage unit 900 may be installed to transmit data stored in the temporary storage unit 900 to an external storage medium. According to this configuration, the various test information collected in the test process is temporarily stored in the temporary storage unit 900 through the control unit 800, and conveniently stored in the external storage medium via the USB port 910 according to the user's needs Can be. This function extends the scope of application of the test device in that the test results for various objects can be conveniently databased and utilized.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, 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 construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

100: main body case 200: housing
210: housing door 400: vacuum pressure control unit
410: vacuum pump 420: first opening and closing valve
430: second on-off valve 440: connection piping
600: pressure measuring sensor 610: sensor piping
700: display unit 710: output display unit
720: menu selection unit 730: input operation unit
740: result display unit 750: target value display unit
800: control unit 900: temporary storage unit
910: USB port

Claims (6)

In the vacuum leak test apparatus for applying a vacuum pressure to the object to be measured and measuring the state of the vacuum pressure change to test whether leakage to the object to be measured,
A main body case having an accommodation space formed therein;
A housing disposed inside the main body case and having a sealable vacuum chamber formed therein to allow the measurement object to be drawn in;
A connection pipe and a sensor pipe connected to the housing so that a portion of the section is located in the vacuum chamber;
A vacuum pressure adjusting unit coupled to one end of the connection pipe to generate and release a vacuum pressure;
A pressure measuring sensor coupled to one end of the sensor pipe and measuring a pressure transmitted through the sensor pipe;
A display unit mounted on one side of the main body case to display a measurement value by the pressure measuring sensor, and an input operation unit formed to allow a user to input input information; And
Control unit for controlling the operation of the vacuum pressure control unit according to the input information input by the user
And the other ends of the connection pipe and the sensor pipe are configured to be selectively communicatively coupled with the internal space of the vacuum chamber or the object under test to selectively apply a vacuum pressure to the internal space of the vacuum chamber or the object under test. There is,
The control unit receives the measured value by the pressure measuring sensor to determine whether the leakage of the object to be measured or not, and the display unit displays a result of determining whether the leakage of the object to be leaked,
The display unit displays the measured value by the pressure measurement sensor with respect to time in real time from the moment the vacuum pressure is applied to the vacuum chamber or the internal space of the object to be measured through the vacuum pressure adjusting unit, and displays in real time. Vacuum leak test device.
The method of claim 1,
The display unit may be manufactured in a touch screen manner so that a user may select a function menu by a touch operation, and the input operation unit may activate a new input window on a display screen of the display unit by a touch operation of the menu selection unit. Vacuum leak test apparatus, characterized in that formed in the manner.
delete delete The method of claim 1,
The control unit controls the vacuum pressure adjusting unit to generate a set vacuum pressure to maintain the set vacuum pressure, and to receive the measured value measured by the pressure measuring sensor and maintain the set vacuum pressure in the inner space of the vacuum chamber or the object to be measured. A vacuum leak test apparatus, characterized in that it is determined whether or not the leakage of the measured object on the basis of the state or the set vacuum pressure arrival time.
The method of claim 1,
A temporary storage unit capable of storing test information including a measured value by the pressure measuring sensor; And
USB port connected to the temporary storage unit for transmitting data from the temporary storage unit to an external storage medium
Vacuum leak test apparatus further comprising a.

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