JP4349996B2 - Portable airtight performance measuring device - Google Patents

Description

  The present invention is capable of nondestructively measuring the airtight performance of a completed existing measurement target room, and can freely measure various parts in the room, and is also portable. The present invention relates to a device for measuring airtight performance.

When examining the breathability of various materials, for example, as disclosed in Patent Document 1 and Patent Document 2, a sample of a material that is easy to handle is used. In this state, the permeation state of the gas leaking from one of the samples to the other is measured. Patents that have a configuration similar to Patent Documents 1 and 2 and that perform similar measurement tests on building material specimens used in clean rooms, and that use the measurement results of airflow for performance design of clean rooms Document 3 is also known.
Japanese Patent Laid-Open No. 49-60992 Japanese Patent Laid-Open No. 54-60994 JP-A-62-80536

  By the way, for the above-mentioned clean rooms and rooms that require strict air-conditioning control, not only the specimens cut out from the building components that make up these rooms, It is preferable to measure the pressure decay state of the chamber. For this purpose, it is necessary to measure the leakage state that occurs inside and outside the room through a wall or ceiling that partitions the room and partitions the room.

  In any of the above-mentioned patent documents, a sample or a specimen is a measurement object, and the measurement device is configured on the premise of a measurement operation in a laboratory, and the measurement operation is performed on a completed existing room. It was unsuitable for doing. That is, all patent documents have a configuration in which the measurement object is sandwiched between the front and back sides by the measurement equipment, whereas the existing room has no opening on the wall or ceiling, or the opening However, due to circumstances such as where the point to be measured is far from the opening, it is not possible to sandwich the part that needs to be measured from the front and back sides with measurement equipment. Even in the disclosed measuring apparatus, there is a problem that the entire chamber cannot be freely measured, and therefore the airtight performance of the chamber cannot be appropriately measured.

  For the convenience of installing a measuring device, forming a through-hole or the like near the wall surface without the opening or the location to be measured damages the completed chamber. The formation of the holes is not preferable because the airtight performance of the chamber may be deteriorated.

  Further, in order to freely measure various parts of a considerably large room space as needed, it is necessary that the measuring apparatus is portable or portable.

  The present invention was devised in view of the above-described conventional problems, and can measure the hermetic performance of a completed measurement target room in a non-destructive manner and freely adjust various parts in the room. It is an object of the present invention to provide a portable airtight performance measuring apparatus that can be measured easily and has high portability.

A portable airtight performance measuring device according to the present invention is a device for nondestructively measuring the pressure decay state of an existing measurement target chamber, and for hermetically sealing the measurement target portion of the measurement target chamber . A portable chamber which is detachably attached via a sealing member and forms a measurement space facing the measurement target portion; and a leg portion which supports the chamber while being pressed against the measurement target portion; A portable air pump connected to a pipe airtightly attached to the chamber and reducing the pressure in the measurement space to a predetermined pressure set in advance, and a pressure introduction pipe in the measurement space airtightly attached to the chamber A portable differential pressure gauge that detects and outputs a differential pressure value between the pressure in the measurement space introduced and the pressure in the measurement target chamber, and a differential pressure that is connected to the differential pressure gauge and input from the differential pressure gauge Use value Characterized by comprising a computer portable displaying calculates the airtightness of the measurement target region in real time.

  In the portable airtight performance measuring apparatus according to the present invention, it is possible to measure the airtight performance of a completed existing measurement target room in a nondestructive manner and to freely measure various parts in the room. In addition, it is rich in portability, and good operability can be ensured.

  Hereinafter, a preferred embodiment of a portable airtight performance measuring device according to the present invention will be described in detail with reference to the accompanying drawings. The portable airtight performance measuring apparatus according to the present embodiment is basically an apparatus for nondestructively measuring the pressure decay state of an existing measurement target chamber 1 as shown in FIGS. A portable chamber 4 that forms a measurement space V facing the measurement target portion 2 and is attached to the measurement target portion 2 of the measurement target chamber 1 through a sealing member 3 in a detachable manner. Connected to the pipe 5 and connected to a portable air pump 6 that changes the pressure P1 in the measurement space and a pressure introduction pipe 7 in the measurement space that is airtightly attached to the chamber 4 A portable differential pressure gauge 8 that detects and outputs a differential pressure value between the internal pressure P1 and the measurement target indoor pressure P2, and is connected to the differential pressure gauge 8 and outputs the differential pressure value of the measurement target region 2 using the differential pressure value that is output. Calculate and display hermetic performance in real time Constructed and a computer 9 for bets is portable.

  As shown in FIG. 2, the existing measurement target chamber 1 is generally partitioned mainly from a wall 1a, a ceiling 1b, and a floor 1c that partition the inside and outside of the chamber. In other words, the airtight performance of the measurement target chamber 1 depends on the air permeability of the walls 1a, the ceiling 1b, the floor 1c, the door 1d and the like in contact with the outside. The portable airtight performance measuring apparatus of the present embodiment has a configuration to be described later, so that any room in terms of structure, form, and material can be used as a measurement target, wall 1a, ceiling 1b, floor. The airtight performance can be measured using an arbitrary part that partitions the chamber, such as 1c, as a measurement target part.

  The portable chamber 4 has a container-like shape having a wide-opening 4a facing the measurement target portion 2 of the measurement target chamber 1, and of course has a portable outer diameter and weight. In the illustrated example, it is formed in a hollow box shape. The chamber 4 may be formed opaque with a metal material, but is preferably formed with a transparent material so that the inside can be seen. Therefore, the chamber 4 is also formed with, for example, a synthetic resin material or glass.

  In particular, in the portable airtight performance measuring apparatus according to the present embodiment, a single chamber 4 is arranged on one side of the wall 1a, the ceiling 1b, etc. of the measurement target room 1 partitioning the inside and outside of the room, not on both sides. It is supposed to do. The chamber 4 has an opening 4 a formed with an outward flange portion 4 b along the circumferential direction, and the flange portion 4 b comes into contact with the measurement target portion 2 facing the inside of the measurement target chamber 1 so as to be able to contact and separate. As a result, a measurement space V that surrounds the chamber 4 and faces the measurement target region 2 is formed. Further, a vacuum grease is interposed between the flange portion 4b and the measurement target portion 2 as a sealing member 3 for hermetically sealing these press contact portions. If the vacuum grease is previously applied to the flange portion 4 b, it can be provided between the measurement target part 2 and the chamber 4 by pressing the chamber 4 against the measurement target part 2. With this vacuum grease, the measurement space V of the measurement target portion 2 formed in the chamber 4 can be hermetically cut off from the indoor space of the measurement target chamber 1.

  Further, the chamber 4 is provided with a leg portion 10 for supporting the chamber 4 in a state where it is pressed against the measurement target portion 2. In FIG. 1, there is shown a leg portion 10 that supports the chamber 4 when the measurement target portion 2 is an upright surface, and the leg portion 10 is provided at each of the support rod 11 and both ends of the support rod 11. A pair of grounding plates 13 having adhesiveness provided via a rotary joint 12, with one grounding plate 13 attached to the chamber 4, the other grounding plate 13 is attached to the fixed system 14, Thereby, the attachment state of the chamber 4 is maintained. The support state of the chamber 4 by the leg portion 10 with respect to the horizontal plane is a mode in which the figure is rotated 90 ° to the right.

A pipe 5 such as a flexible tube is attached to the chamber 4 in an airtight and integrated manner, and a portable air pump 6 that changes the pressure P1 in the measurement space is connected to the tip of the pipe 5. The portable air pump 6 is well known. The air pump 6 includes an intake hole 6a and an exhaust hole 6b, and has a function of discharging the sucked air. When the pipe 5 is connected to the intake hole 6a, the pressure P1 in the measurement space is reduced. In order to stably maintain the airtightness of the chamber 4 attached to the measurement target site 2 via the sealing member 3 such as vacuum grease, the pressure P1 in the measurement space is changed by the pressure reducing action by the air pump 6 .

  In addition, a pressure introducing pipe 7 for measurement such as a flexible tube is airtightly and integrally attached to the chamber 4, and a portable differential pressure gauge 8 is connected to the tip of the pressure introducing pipe 7. The portable differential pressure gauge 8 is well known. The differential pressure gauge 8 includes a pair of communication pipes 8a for taking in pressure to be measured. The pressure introduction pipe 7 is connected to one communication pipe 8a, and the other communication pipe 8a is opened to the atmosphere. The differential pressure gauge 8 successively and continuously detects a differential pressure value between the measurement space pressure P1 introduced from the pressure introduction pipe 7 and the measurement target room pressure P2 introduced from the communication pipe 8a opened to the atmosphere. The differential pressure value is displayed on the meter 8c, and the detected value is sequentially output as an electric signal.

  A portable computer 9 such as a notebook computer is connected to the differential pressure gauge 8. The computer 9 is equipped with analysis software for calculating and displaying the airtight performance from the differential pressure value, and using the differential pressure values sequentially input from the differential pressure gauge 8, the airtight performance of the measurement target region 2 is measured in real time. And is displayed on a monitor, and when a printer is connected, it is printed out. The computer 9 can incorporate a control program for controlling the air pump 6 and the differential pressure gauge 8, and the operation of the air pump 6 and the differential pressure gauge 8 may be controlled by the control program. .

  Next, the operation of the portable airtight performance measuring apparatus according to the present embodiment will be described. When performing measurement, only the measurement target portion 2 in the measurement target chamber 1, for example, the indoor surface of the wall 1a, A single chamber 4 is attached via a sealing member 3 such as a vacuum grease, and the chamber 4 is supported by the legs 10, thereby forming an airtight measurement space V facing the measurement target portion 2. Next, the air pump 6 is connected to the pipe 5, the measurement space pressure introduction pipe 7 is connected to the differential pressure gauge 8, and the computer 9 is connected to the differential pressure gauge 8.

  When the installation work is completed, the measurement work is performed according to the flowchart shown in FIG. 3, for example. First, the air pump 6 is operated, the air in the measurement space V is sucked, and the pressure P1 in the measurement space is reduced (S1). This reduced pressure state can be confirmed by looking at the monitor display of the meter 8c of the differential pressure gauge 8 or the computer 9 into which the in-measuring pressure P1 is introduced via the pressure introduction pipe 7. Next, it is determined whether or not the pressure has been reduced to a predetermined pressure set in advance (S2). If the pressure does not reach the predetermined pressure, the suction is continued. If the pressure is reached, the suction by the air pump 6 is stopped (S3). After the suction is stopped, the pressure P1 of the reduced measurement space V gradually increases according to the air permeability of the measurement target portion 2, and this state can be confirmed by looking at the differential pressure gauge 8 or the like. Thereafter, it is determined whether or not the pressure P1 in the measurement space has been restored to the predetermined pressure set in advance (S4), and if the pressure is restored, the measurement operation is terminated.

  The differential pressure value detected from the start of measurement by the start of the air pump 6 to the end of measurement is continuously detected by the differential pressure gauge 8, and the detected value is output to the computer 9 together with the detection time. Then, the computer 9 to which the detection value is inputted calculates and displays the airtight performance of the measurement target portion 2 by the analysis software. Various determination operations in such a measurement procedure, continuation / cancellation of suction by the air pump 6, and termination of the measurement operation may be performed manually. As described above, a control program is stored in the computer 9 as described above. By installing, automatic control can be performed.

  As described above, the portable airtight performance measuring apparatus according to the present embodiment measures the portable chamber 4 attached to one surface of the measurement target portion 2, so that it is a completed existing chamber. Even if it exists, it can measure freely as a measuring object, and unlike measuring a test body etc., the airtight performance of the said measuring object chamber 1 itself can be measured appropriately. At that time, it is not necessary to form a through-hole or the like in the measurement target chamber 1 for convenience of measurement, and the measurement can be performed nondestructively. Moreover, since it comprised with the portable chamber 4, the air pump 6, the differential pressure gauge 8, and the computer 9, it is rich in portability, and it is good as needed even if the measuring object room 1 has a considerably large room space. With various operability, various measurement target parts 2 can be freely measured.

In the above embodiment, the hollow box-shaped chamber 4 has been described as an example. However, the chamber 4 may be cylindrical or hemispherical. Moreover, although the case where it measured from the room inner side of the measurement object chamber 1 was demonstrated and demonstrated, the chamber 4 can be attached to the wall 1a etc. of an outdoor side, and a measurement operation | work can also be performed from the measurement object room 1 outside .

It is a block diagram which shows suitable one Embodiment of the portable airtight performance measuring apparatus concerning this invention. It is a side view which shows an example of the existing measurement object chamber measured by the portable airtight performance measuring apparatus of FIG. It is a flowchart figure which shows an example of the measurement procedure by the portable airtight performance measuring apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing measuring object chamber 2 Measuring object part 3 Sealing member 4 Portable chamber 5 Piping 6 Portable air pump 7 Pressure introduction pipe in measurement space 8 Portable differential pressure gauge 9 Portable computer P1 In measurement space Pressure P2 Measurement target room pressure V Measurement space

Claims (1)

A device for nondestructively measuring the pressure decay state of an existing measurement object chamber,
A portable chamber that is detachably attached to the measurement target portion of the measurement target chamber via a sealing member for hermetically sealing, and forms a measurement space facing the measurement target portion;
Legs that support the chamber in a state of being pressed against the measurement target site;
A portable air pump connected to a pipe airtightly attached to the chamber and reducing the pressure in the measurement space to a predetermined pressure ;
A portable differential pressure gauge that is connected to a pressure introduction pipe in a measurement space that is airtightly attached to the chamber and detects and outputs a differential pressure value between the pressure in the measurement space introduced and the pressure in the measurement target room;
A portable airtight performance comprising: a portable computer connected to the differential pressure gauge and calculating and displaying the airtight performance of the measurement target part in real time using a differential pressure value input from the differential pressure gauge measuring device.

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