JP2016065738A - Airtight inspection jig and airtight inspection method of connection part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an airtight inspection jig and an airtight inspection method of a connection part, the jig that facilitates mounting and removal of an inspection object, and furthermore, can perform inspection safely.SOLUTION: An airtight inspection jig Z includes a base 1, a slid member mounted to this base 1, a slide member hermetically sliding to this slid member 2, a locked part 4 where an inspection object k provided in the base 1 is locked, and a passage conducted to the inside of the slide member 3. The passage is brought into communication with a chamber surrounded by the slid member 2 and the slide member 3. The inspection object k has a fluid induction port K1 on the tip, a connection part K2 by brazing and welding in the middle, and a rear end opening part K3 in the rear end. The airtight inspection jig Z and the inspection object k are present in a state where the inspection object k is locked to the locked part 4. The opening part of the passage of the slide member 3 and the fluid induction port K1 of the inspection object k are brought into an opposed positional relationship.SELECTED DRAWING: Figure 2

Description

    The present invention relates to an airtightness inspection jig and an airtightness inspection method for a connection part, and in particular, an airtight inspection jig and a connection part that can be easily attached and detached and can be safely inspected. This relates to the airtightness inspection method.

    Conventionally, when inspecting the airtightness of a connection part by brazing, welding, etc., an air coupler is screwed to one end of a passage of an inspection object, and one end of the passage is closed, and then the other end of the passage of the inspection object A fluid is supplied from the pipe to check the airtightness of the connection site.

    Therefore, it is necessary to attach the air coupler to the inspection object by screwing, and after the inspection, it is also necessary to remove the air coupler from the inspection object by rotating it in the direction opposite to the screwing. Furthermore, if the state of screwing between the inspection object and the air coupler is insufficient, the air coupler jumps out of the inspection object due to the fluid pressure in the inspection object passage, which is dangerous for workers. A point occurred.

    The present invention has been made in consideration of the above-described problems, and provides an airtight inspection jig and a connection portion airtight inspection method that allow easy attachment and removal of an inspection object and can be safely performed. The purpose is to provide.

    An airtightness inspection jig according to claim 1 is provided on a base, a sliding member attached to the base, a sliding member that slides airtightly on the sliding member, and the base. A locked portion to which the object to be inspected is locked, and a passage that conducts to the inside of the sliding member, and this passage is in a chamber surrounded by the sliding member and the sliding member. The inspection object has a fluid introduction port at the tip, a connection part by brazing, welding, etc. in the middle, a rear end opening at the rear end, and the middle from the rear end opening. In the middle of the inspection passage connected to the fluid introduction port, the inspection object is in a state of being locked to the locked portion, and the opening of the passage of the sliding member and the inspection object The fluid introduction ports are in a positional relationship facing each other.

    According to a second aspect of the present invention, there is provided a method for airtightness inspection of a connection site, a base, a sliding member attached to the base, a sliding member that slides airtight with respect to the sliding member, A locked portion provided on a base for locking an object to be inspected, and a passage that conducts to the inside of the sliding member. The passage is surrounded by the sliding member and the sliding member. The inspection object has a fluid inlet at the tip, a connection part by brazing, welding, etc. in the middle, a rear end opening at the rear end, and the middle has the rear end. In the middle of the inspection passage connected from the opening to the fluid introduction port, the inspection object is locked to the locked portion, and the opening of the passage of the sliding member and the inspection The fluid introduction port of the object is in a positional relationship facing, and the rear end opening of the inspection object is Supplying fluid, supplying the fluid from the passage of the sliding member to the inside of the sliding member through the fluid inlet of the inspection object and the opening of the passage of the sliding member, The sliding member moves toward the inspection object, and the leading edge of the passage of the sliding member is in intimate contact with the edge of the fluid inlet of the inspection object. It is something to do.

    According to a third aspect of the present invention, there is provided an airtightness inspection method for a connection part according to the second aspect, wherein the airtightness inspection is performed by immersing the connection state of the connection part in water or the connection part. Inspection is performed in a state where water is applied, or in a state where soapy water is applied to the connection site.

According to the airtightness inspection jig of the first aspect, the inspection object is locked to the locked portion of the base, and the opening of the passage of the sliding member and the fluid inlet of the inspection object are provided. If the inspection object is locked to the locked portion of the base and the inspection passage of the inspection object is filled with fluid, the fluid is introduced through the fluid inlet of the inspection object and the passage of the sliding member. Then, the fluid flows into the chamber formed between the sliding member and the sliding member, the sliding member moves toward the inspection object, and the leading edge of the passage of the sliding member is the inspection object. In close contact with the edge of the fluid inlet of the fluid, the contact part of the inspection object is submerged in the water, or water is applied to the connection part, or soap water is applied to the connection part. If the airtight inspection is carried out by applying a coating, the airtightness of the connection part of the inspection object can be easily inspected. If stopping the supply of fluid to the object, the contact state between the edge of the fluid inlet tip edges and test object of the passage of the sliding member can be easily released,
In other words, the inspection object can be easily attached and removed without screwing the inspection object into the airtight inspection jig as in the prior art, and even if the contact state between the sliding member and the inspection object is insufficient, the inspection path It is possible to perform the inspection safely without the sliding member being detached and popping out of the airtight inspection jig by the fluid pressure inside.

Further, according to the method for hermetic inspection of the connection part according to claim 2, the inspection object is locked to the locked part of the base, and the opening of the passage of the sliding member and the fluid of the inspection object Since the introduction port is in a facing relationship, if the inspection object is locked to the locked portion of the base and the inspection passage of the inspection object is filled with fluid, the fluid introduction port of the inspection object and the sliding member The fluid flows into the chamber formed between the sliding member and the sliding member through the passage, the sliding member moves toward the object to be inspected, and the leading edge of the passage of the sliding member is In close contact with the edge of the fluid inlet of the inspection object, in this state, the connection part of the inspection object is submerged in water, water is applied to the connection part, or soap water is applied to the connection part If the air tightness inspection is performed by applying a coating, the airtightness of the connection part of the inspection object can be easily inspected. If stopping the supply of fluid to the object, the contact state between the opening edge portion of the inspection object and the leading edge of the passage of the sliding member can be easily released,
In other words, the inspection object can be easily attached and removed without screwing the inspection object into the airtight inspection jig as in the prior art, and even if the contact state between the sliding member and the inspection object is insufficient, the inspection path It is possible to perform the inspection safely without the sliding member being detached and popping out of the airtight inspection jig by the fluid pressure inside.

FIG. 1 is a schematic perspective view of a state in which an inspection object according to an embodiment of the present invention is locked to an airtight inspection jig and fluid is supplied to the inspection object. FIG. 2 is a schematic partially exploded perspective view showing a part of the airtightness inspection jig shown in FIG. 1 in an exploded manner. FIG. 3A is a schematic front view of FIG. 1, and FIG. 3B is a schematic right side view of FIG. FIG. 4A is a schematic diagram showing the positional relationship between the opening of the passage of the sliding member in FIG. 1 and the opening of the inspection passage of the inspection object, and FIG. It is the schematic which showed the state which supplied the fluid to the test | inspection channel | path of the test target of 4 (a). FIG. 5 is a schematic diagram showing a state in which an airtight inspection is performed by immersing the inspection object of FIG. It is. FIG. 6 shows an airtightness inspection jig of another embodiment different from the airtightness inspection jig of FIG. 1, in which the inspection object is locked to the airtightness inspection jig and fluid is supplied to the inspection object. FIG.

    An airtightness inspection jig and a connection part airtightness inspection method according to an embodiment of the present invention will be described with reference to the drawings (FIGS. 1 to 5).

    Z shown in FIG. 1 is an airtightness inspection jig used in a method for airtightness inspection of a connection part. The airtightness inspection jig Z includes a base 1, a sliding member 2 attached to the base 1, The sliding member 3 that slides in an airtight manner with respect to the sliding member 2, the locked portion 4 to which the inspection object K provided on the base 1 is locked, and the inside of the sliding member 3 are electrically connected. (Refer to FIG. 2 to FIG. 4). The airtightness of the sliding member 2 and the sliding member 3 is maintained by a seal member S provided between the inner periphery of the cylinder-shaped sliding member 3 and the outer periphery of the piston-shaped sliding member 2. ing.

The base 1 has, for example, a flat surface. For example, the sliding member 2 is attached to a first standing member 11 attached to the base 1 by a screw 12. Further, if the sliding member 2 is described in detail, for example, a seal member S is provided on the outer periphery. Further, the horizontal member parallel to the base 1 has a circular cross-sectional shape that crosses the longitudinal direction of the horizontal member.
The sliding member 3 has, for example, a cylindrical shape and slides airtightly on the outer periphery of the sliding member 2.
Also, 31 shown in FIG. 4 is a passage that conducts to the inside of the sliding member 3, and this passage 31 communicates with a chamber 32 surrounded by the sliding member 2 and the sliding member 3. .
Further, as shown in FIG. 2, the locked portion 4 is attached to the base 1, and is cut out, for example, in a substantially U shape in a second standing member 12 ′ that faces the first standing member 11. Is.

The inspection object K constitutes, for example, a part of the refrigeration cycle. As shown in FIGS. 2 and 4, the fluid introduction port K1 at the front end, the connection part K2 by brazing, welding or the like, the rear end, as shown in FIGS. The rear end opening K3 is in the middle of the inspection passage KP connected from the fluid inlet K1 to the rear end opening K3.
Then, in a state where the inspection target K is locked to the locked portion 4, the positional relationship in which the opening of the passage 31 of the sliding member 3 and the fluid introduction port K1 of the inspection passage KP of the inspection target K face each other. [See FIG. 4 (a)]. The opening of the passage 31 of the sliding member 3 is formed of a silicon member 31A that is a softer material than the main body (for example, metal) of the sliding member 3, and the tip edge of the passage 31 of the sliding member 3 is the object to be inspected. It is possible to more closely contact the edge of the opening of the object K.

Therefore, according to the above-described airtightness inspection jig (method for airtightness inspection of the connection portion) Z, the inspection object K is in the state of being locked to the locked portion 4 of the base 1, and the passage of the sliding member 3. Since the opening 31 and the fluid introduction port K1 of the inspection passage KP of the inspection object K face each other [see FIG. 4 (a)], the inspection object K is engaged with the locked portion 4 of the base 1. For example, if air is supplied from the air nozzle N (see FIG. 5) via the fluid introduction port K1 and the inspection passage KP of the inspection object K is filled with fluid, the fluid introduction port K1 of the inspection object K will be described. The fluid flows into the chamber 32 formed between the sliding member 2 and the sliding member 3 through the passage 31 of the sliding member 3, and the sliding member 3 moves toward the inspection object K. The tip edge of the passage 31 of the sliding member 3 is in close contact with the edge of the fluid inlet K1 of the inspection object K, and in this state The connection part K2 of the inspection object K is submerged in the water shown in FIG. 5 (or water (not shown) is applied to the connection part or soap water (not shown) is applied to the connection part), etc. For example, the airtightness of the connection portion K2 of the inspection object K can be easily inspected, and if the supply of the fluid to the inspection object K is stopped, the tip edge portion of the passage 31 of the sliding member 3 and the inspection are inspected. The contact state of the object K with the fluid inlet K1 can be easily released,
That is, the fluid is supplied from the rear end opening K3, the fluid is supplied from the passage 31 of the sliding member 3 to the inside of the sliding member 3 through the fluid inlet K1, and the sliding member 3 is inspected K. Since the tip edge portion of the passage 31 of the sliding member 3 can be in close contact with the fluid inlet K1 of the inspection object K, the airtight inspection can be performed.
The inspection object K can be easily attached to and detached from the airtight inspection jig Z without being screwed in the conventional manner, and even if the contact state between the sliding member 3 and the inspection object K is insufficient, The fluid pressure in the inspection passage KP allows the inspection to be performed safely without the sliding member 3 being detached and popping out from the airtight inspection jig Z.

In the embodiment of the above-described airtightness inspection jig (connection site airtightness inspection method) Z, the sliding member 3 has a cylindrical shape. However, the present invention is not limited to this, and is described in FIG. As described above, the sliding member 3 may have a piston shape.
In the embodiment described above, the sliding member 2 is attached to the base 1 with the screw 12. However, in the present invention, the sliding member 2 is not limited to this, as shown in FIG. You may attach to the base 1 integrally.
In the embodiment shown in FIG. 6, the sliding member 3 slides in an airtight manner with respect to the sliding member 2, but the airtightness of the sliding member 2 and the sliding member 3 is a cylinder shape. Is held by a seal member S provided between the inner periphery of the sliding member 2 and the outer periphery of the piston-shaped sliding member 3.
Further, in the embodiment shown in FIG. 6, the same parts as those in the embodiment shown in FIGS.

Z airtightness inspection jig K inspection object KP inspection passage 1 base 2 sliding member 3 sliding member 4 locked portion 31 passage 32 chamber K1 fluid introduction port

Claims (3)

Base and
A sliding member attached to the base;
A sliding member that slides airtight with respect to the sliding member;
A locked portion to which an inspection object provided on the base is locked;
A passage that leads to the inside of the sliding member,
This passage communicates with the chamber surrounded by the sliding member and the sliding member,
The inspection object has a fluid introduction port at the front end, a connection part by brazing, welding or the like in the middle, a rear end opening at the rear end, and the middle is connected to the fluid introduction port from the rear end opening. In the middle of the inspection passage
The inspection object is in a state of being locked to the locked part, and the opening of the passage of the sliding member and the fluid inlet of the inspection object are in a positional relationship facing each other. Jig for airtight inspection. Base and
A sliding member attached to the base;
A sliding member that slides airtight with respect to the sliding member;
A locked portion to which an inspection object provided on the base is locked;
A passage that leads to the inside of the sliding member,
This passage communicates with the chamber surrounded by the sliding member and the sliding member,
The inspection object has a fluid introduction port at the front end, a connection part by brazing, welding or the like in the middle, a rear end opening at the rear end, and the middle is connected to the fluid introduction port from the rear end opening. In the middle of the inspection passage
In the state where the inspection object is locked to the locked portion, the opening portion of the passage of the sliding member and the fluid introduction port of the inspection object are in a positional relationship facing each other.
Fluid is supplied from the rear end opening of the inspection object, and the sliding member is passed from the passage of the sliding member through the fluid inlet of the inspection object and the opening of the passage of the sliding member. The fluid is supplied to the interior of the sliding member, the sliding member moves toward the inspection object, and the leading edge of the passage of the sliding member is tightly connected to the edge of the fluid inlet of the inspection object. An airtight inspection method for a connection site, characterized in that an airtight inspection is performed in contact with the contact portion. Airtight inspection
The connection according to claim 2, wherein the connection state of the connection part is inspected in a state where the connection part is immersed in water, in a state where water is applied to the connection part, or in a state where soap water is applied to the connection part. How to check the airtightness of parts.

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