JP3124758U - Piping connector - Google Patents

Abstract

An object of the present invention is to easily and reliably connect a main pipe and a connection pipe without flaring the tip of the connection pipe.
A threaded pipe 6 projecting from a rear end portion of a nut 3 to which a main pipe is attached, a joint nut 10 inserted through the connecting pipe 7, and a rubber packing 8 attached to the front end of the connecting pipe 7. , A stopper 9 inserted into the connecting pipe 7 between the rubber packing 8 and the joint nut 10. A storage portion 16 for inserting the rubber packing 8 is provided inside the screw pipe 6. A screw groove 15 into which the screw tube 6 is screwed on its peripheral surface, and a storage portion 16 into which the rear portion 13 of the stopper 9 is fitted are provided behind the screw groove 15, and the rear end of the rubber packing 8 and the stopper 9 are provided. A pipe connector having contact surfaces 12 and 12 formed at the front end of each, and a rear portion 13 of the fastener 9 having a reduced shape and a split groove 14 formed in the axial direction thereof.

Description

  The present invention relates to a pipe connector that eliminates the need for, for example, flaring a refrigerant pipe connection portion, facilitates connection work, and ensures a connected state.

  4 and 5 generally show connections between refrigerant pipes (liquid pipes and gas pipes) that interconnect indoor units and outdoor units of conventional air conditioners and connection ports on the indoor unit and outdoor unit sides. Such a flare pipe joint structure is adopted.

This flare pipe joint is a butt portion of a predetermined flare angle formed in a cylindrical connection port body (or connection valve body on the closing valve side) 2 on the union pipe joint 1 side fixed to the indoor unit or the outdoor unit. The connection end of the refrigerant pipe a composed of, for example, a copper pipe having a flare processed into a flare shape corresponding to the flare angle is abutted against the end, and the outer periphery of the connection is a flare nut. It is supposed to be connected and fixed to each other by tightening at 17.
JP2003-74769

  However, in the connection work described above, the flare portion b of the refrigerant pipe a is subjected to (1) a predetermined divergence angle and (2) ) The width of the expanded flare is uniform in the entire circumferential direction, and (3) it is carefully processed so that it is flush with the inner peripheral surface. give.

  Therefore, in general, careful processing work is performed so that at least the above three conditions (1) to (3) are ensured. However, it is still a busy work at the installation site, and the skill of each worker is There is a problem that processing accuracy cannot always be expected due to variations due to degree and individual differences.

  In view of the above circumstances, the present invention provides a threaded pipe projecting from a rear end portion of a nut to which a main pipe is attached, a joint nut inserted into the connection pipe, and a rubber packing attached to the front end of the connection pipe. And a fitting that is inserted into a connecting pipe between the rubber packing and the joint nut, and a storage portion for inserting the rubber packing is provided inside the screw pipe, and the joint nut is provided on a peripheral surface thereof. A pipe connector is proposed in which a screw groove into which the screw tube is screwed and a storage portion into which the rear portion of the fastener is inserted is provided behind the screw groove.

  That is, when the joint nut inserted into the connection pipe is screwed into the threaded pipe projecting from the rear end of the nut to which the main pipe is mounted in the above configuration, the rear part of the stopper metal is caused by the screwing force at that time. Further, the front end portion of the stopper metal comes into contact with the rear end portion of the rubber packing to push out the rubber packing, and the rubber packing is inserted into the storage portion formed inside the screw tube.

  Therefore, in this device, the main pipe and the connection pipe can be easily and reliably connected without flaring the end of the connection pipe.

  In this device, if the abutting surfaces are formed at the rear end portion of the rubber packing and the front end portion of the fastener, the screwing force when the fitting nut is screwed onto the screw pipe is effectively transmitted to the rubber packing. Can do.

  Furthermore, if the rear part of the fastener is reduced in shape and a split groove is formed in the axial direction, the rear part of the fastener is inserted into the joint nut housing by the screwing force when the joint nut is screwed onto the screw pipe. Can be made.

  A threaded pipe projecting from the rear end of the nut to which the main pipe is attached, a joint nut inserted into the connection pipe, a rubber packing attached to the front end of the connection pipe, and between the rubber packing and the joint nut A screw that is inserted into the connecting pipe, and that has a housing for fitting the rubber packing inside the threaded pipe, and a screw in which the threaded pipe is screwed onto the periphery of the joint nut. A storage part is provided behind the groove and the screw groove to fit the rear part of the stopper, and contact surfaces are formed at the rear end of the rubber packing and the front end of the stopper, respectively, and the rear part of the stopper is shrunk. Piping connector that is shaped and has a slit in its axial direction

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. Reference numeral 3 denotes a nut for screwing a main pipe such as the cylindrical connection port body 2 of the above-described union pipe joint 1. A seal ring 5 is fitted to the end of the screwed portion 4, and a screw tube 6 having a screw groove formed on the outer periphery thereof is provided at the rear end of the nut 3.

  On the other hand, 7 is a connection pipe connected to the main pipe, and the front end of the connection pipe 7 has a weather resistance, heat resistance, insulation, chemical resistance, oil resistance, etc. CNR Super 5 (trade name) A rubber packing 8 having a reduced front shape is attached, and a fastener 9 and a joint nut 10 are inserted.

  A storage portion 11 into which the rubber packing 8 is inserted is formed inside the screw tube 6, and contact surfaces 12, 12 are formed at the rear end portion of the rubber packing 8 and the front end portion of the stopper 9, respectively. The

  Further, the rear portion 13 of the stopper 9 is formed in a contracted shape to form a split groove 14 in the axial direction thereof, and further, a screw groove 15 to be screwed into the screw pipe 6 is formed on the inner periphery of the joint nut 10. A storage portion 16 into which the rear portion 13 of the stopper 9 is inserted is formed behind the groove 15.

  In the above configuration, when the joint nut 10 inserted into the connection pipe 7 is screwed to the screw pipe 6 protruding from the rear end portion of the nut 3 to which the main pipe is screwed, the fastener 9 is screwed by the screwing force at that time. The rear portion 13 is forcibly stored in the storage portion 16 of the joint nut 10.

  On the other hand, the abutting surfaces 12 and 12 formed at the front end portion of the stopper metal 9 and the rear end portion of the rubber packing 8 abut against each other due to the screwing force to push out the rubber packing 8, and the storage portion 9 formed inside the screw tube 4. The rubber packing 8 is inserted into.

  Therefore, in this device, the cylindrical connection port body 2 of the union pipe joint 1 and the connection pipe 7 can be easily and reliably connected without flaring the end of the connection pipe.

  In addition, although the connection tool of piping concerning this invention is optimal for the connection of refrigerant | coolant piping etc., it is not limited to this but can be applied to various piping connections.

  In short, in the present invention, the main pipe and the connection pipe 5 can be easily and reliably connected without flaring the end of the connection pipe.

An exploded partial side view of a pipe connector showing an embodiment of the present invention The figure seen from the AA arrow direction same as above Side view in the assembled state Disassembled partially vertical side view of conventional refrigerant piping Side view in the assembled state

Explanation of symbols

1 is a union pipe joint 2 is a cylindrical connection body
2a is the threaded part of the connection port body
2b is the end of the flare angle of the connection port body 3 is a nut for screwing the main pipe 4 is a screw part of the main pipe 5 is a seal ring 6 is a screw pipe 7 is a connection pipe 8 is a rubber packing 9 is a stopper
10 is the fitting nut
11 is the storage part of the rubber packing
12 and 12 are contact surfaces
13 is the rear part of the fastener
14 is the slot
15 is thread groove
16 is the storage part at the rear of the fastener
17 is flare nut

Claims (3)

A threaded pipe projecting from the rear end of the nut to which the main pipe is attached, a joint nut inserted into the connection pipe, a rubber packing attached to the front end of the connection pipe, and between the rubber packing and the joint nut A screw that is inserted into the connecting pipe, and that has a housing for fitting the rubber packing inside the threaded pipe, and a screw in which the threaded pipe is screwed onto the periphery of the joint nut. A pipe connector comprising a groove and a storage portion into which the rear portion of the stopper fitting is inserted behind the screw groove. 3. A pipe connector according to claim 2, wherein an abutting surface is formed at each of a rear end portion of the rubber packing and a front end portion of the stopper metal. The pipe connector according to claim 1, wherein a rear portion of the stopper metal is formed in a contracted shape and a split groove is formed in the axial direction thereof.

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