JP2009074619A - Piping joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping joint capable of improving assembling workability. <P>SOLUTION: The piping joint comprises a holding member 150 having a sealing member holding portion 151 inserted in the inside 116a of an annular projecting portion 116 to be fixed, and abuts on an outside part 130c positioned on the outer side in a diametrical direction than a part on which both seal surface portions 115, 125 abut in a sealing member 130 to hold the sealing member 130 in the inside 116a of the annular projecting portion 116. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pipe joint that connects at least two pipes to communicate the inside of the pipe.

  As a conventional pipe joint, for example, one described in Patent Document 1 is known. This pipe joint has a first member and a second member in which surfaces facing each other are formed as a sealing surface. A through hole is provided on one end side of each of the pipe connecting members, and ends of the first pipe and the second pipe are joined to the through holes, respectively. A packing ring as a seal member is interposed between the sealing surfaces of the pipe connecting members at positions corresponding to the through holes, and each pipe connecting member is fastened with a bolt, so that the first pipe And the 2nd piping communicates.

Furthermore, for example, annularly projecting seal surface portions are formed on the surfaces of the pipe connecting members facing each other, and the seal surface portions and the surface of the packing ring are brought into pressure contact with each other so as to reliably obtain the sealing performance.
JP 2004-239438 A

  In the above prior art, the packing ring is held by a resin cap attached to a cylindrical protrusion provided with an opening as a flow path. However, this configuration has a problem that the cap workability is poor.

  In view of the above problems, an object of the present invention is to provide a pipe joint capable of improving assembly workability.

  Another object of the present invention is to provide a pipe joint that can be assembled stably and with excellent mounting properties without excessively increasing the diameter of a member for sealing.

  In order to achieve the above object, the present invention employs the following technical means.

  In the first aspect of the present invention, the first member (110) to which the end of the first pipe (11) is connected so as to communicate with the first opening (113) and the second opening (123). The second member (120) to which the end of the second pipe (12) is connected so as to communicate with the two members (110, 120) so as to communicate with both openings (113, 123). An annular seal member (130), and both the members (110, 120) are fastened by the fastening member (140), and both the openings (113, 123) and the seal member (130) are interposed. In the pipe joint in which both the pipes (11, 12) are communicated with each other, the first member (110) is formed to project annularly from the outer periphery of the first opening (113), and has a sealing property with the seal member (130). A first seal surface portion (115) that secures An annular convex portion (116) which is annularly disposed on the outer peripheral portion of the seal surface portion (115) and is formed to protrude from the projecting height of the first seal surface portion (115) in the outer region of the seal member (130). The second member (120) is formed to project annularly from the outer periphery of the second opening (123) and has a second seal surface portion (125) that secures the sealing performance with the seal member (130), and the second member (120). 2 on the outer peripheral portion of the seal surface portion (125), and has an annular recess (126) that is recessed so as to accommodate the annular projection (116), and the inner side (116a) of the annular projection (116). The seal member (130) is affixed to the outer portion (130c) positioned radially outward from the portion of the seal member (130) where both the seal surface portions (115, 125) abut. Inside part (116) (1 Sealing member holding unit for holding the 6a), further comprising a holding member (150) having a (151), characterized.

  According to this configuration, when the seal member (130) is held in the space (116a) formed inside the annular convex portion (116), the holding member is provided on the inner peripheral portion of the annular seal member (130). Since it is not necessary to fit, both seal surface parts (115, 125) of both pipe connecting members (110, 120) can be formed more radially inward in the seal member (130). That is, the diameters of the seal surface portions (115, 125) can be reduced, and when the pipe connecting members (110, 120) are fastened by the fastening member (140), the tightening torque can be reduced, and the assembly workability can be reduced. Can be improved.

  In the invention according to claim 2, the outer peripheral portion of the second seal surface portion (125) is disposed so as to be outside the second member (120) with respect to the projecting tip of the second seal surface portion (125). A plane (121a, 121b) is formed.

  According to this configuration, the second seal surface portion (125) is formed at a position that is farther away from the projecting plane (121a, 121b) than the first member (110). Further, the first seal surface portion (111) is disposed so as to be inside the first member (110) by projecting and forming an annular convex portion (116) on the outer peripheral portion thereof. For this reason, the external force when handling each pipe connecting member (110, 120) during production, during transportation, etc., and the pipe connecting member on one side during assembly of both pipe connecting members (110, 120) are directly Therefore, it is possible to prevent the seal surface portion (115, 125) formed on the other side pipe connecting member from being hit, so that the seal surface portion (115, 125) can be prevented from being damaged. As a result, the possibility of seal leakage at the damaged seal surface portions (115, 125) can be reduced.

  The invention according to claim 3 is characterized in that the seal member holding portion (151) has a cylindrical shape and is press-fitted into the inner side (116a) of the annular convex portion (116).

  According to this configuration, the holding member (150) can be easily held on the inner side (116a) of the annular convex portion (116) by press-fitting operation, and the assembly workability can be further improved.

  In the invention according to claim 4, the holding member (150) is provided continuously with the seal member holding portion (151), and the annular tip surface cover portion that covers the protruding tip surface of the annular protrusion (116). (152) is formed.

  According to this configuration, when the both pipe connecting members (110, 120) are assembled with the first flat surface portion (111) and the second surface portion (121) facing each other, the second member (120) particularly protrudes. It can suppress that a 2nd seal surface part (125) contacts with the annular convex part (116) of a 1st member (110), and is damaged. As a result, sealing failure can be suppressed.

  According to the fifth aspect of the present invention, the holding member (150) is provided with the seal member holding portion (151) so as to be continuous, and covers the protruding tip surface of the annular protrusion (116). (152) is formed, and the end surface cover portion (152) is formed in an outer flange shape extending outward from the end surface of the seal member holding portion (151).

  According to this configuration, the configuration of the seal holding member (150) having the seal member holding portion (151) and the tip surface cover portion (152) is easy and can be suitably implemented.

  According to the sixth aspect of the present invention, the holding member (150B) is formed with a holding portion (153) that holds the both end faces of the seal member (130) at the outer peripheral portion of the seal member (130). It is characterized by.

  According to this configuration, the holding member (150B) can hold the sealing member (130) by the holding portion (153), and the holding member (150B) holding the sealing member (130) is formed into the annular convex portion (116). ) Can be assembled by being inserted inside (116a). That is, the seal member (130) can be easily assembled without falling off during assembly.

  The invention according to claim 7 is characterized in that the seal member (130) and the holding member (150B) are integrally formed.

  According to this structure, there is no possibility that the seal member (130) falls off from the inner side (116a) of the annular convex portion (116), and the assembly process is reduced by being integrally formed with the holding member (150B). be able to.

  In the invention according to claim 8, at least one of the holding member (150C), the annular convex portion (116), and the annular concave portion (126) is provided between the annular convex portion (116) and the annular concave portion (126). A watertight seal convex portion (155a, 155b) for sealing the watertightly is formed.

  According to this configuration, it is possible to prevent water or the like from entering the seal surface portions (115, 125) from the gap between the pipe connecting members (110, 120), so that the seal surface portions (115, 125) are corroded. It is possible to prevent the sealing performance from being lowered.

  In the invention according to claim 9, a watertight annular member (170) that seals between the inner wall (126 a) of the annular recess (126) facing the outer peripheral portion on the outer peripheral portion of the annular convex portion (116). ) And the holding member (150D) covers the outer peripheral portion of the annular convex portion (116) from the projecting side of the annular convex portion (116) toward the watertight annular member (170). A portion (157) is formed.

  According to this configuration, a reliable watertight sealing performance can be ensured by the watertight annular member (170). Further, when both pipe connecting members (110, 120) are assembled with the first flat surface portion (111) and the second surface portion (121) arranged to face each other, the inner wall of the annular recess (126) in the second member (120). It can suppress that (126a) contacts with the cyclic | annular convex part (116) of a 1st member (110), and is damaged. As a result, the watertight state can be ensured, and deterioration of the sealing performance due to the corrosion of the seal surface portions (115, 125) can be prevented.

  The invention according to claim 10 is characterized in that the seal member (130) is made of a soft metal having a lower hardness than each of the pipe connecting members (110, 120), and the holding member (150) is made of resin. And

  According to this configuration, while the sealing performance can be secured by the metal seal member (130), the holding member (150) is made of resin and thus easily deforms, and the shape tolerance on the pipe connecting member (110, 120) side. Can be easily followed.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description later mentioned.

(First embodiment)
The first embodiment will be described below with reference to FIGS. FIG. 1 is an external view showing a configuration of a refrigeration cycle apparatus 1 including pipe joints 100A, 101, and 102 in the present embodiment.

The refrigeration cycle apparatus 1 is used as a supercritical refrigeration cycle in which, for example, carbon dioxide is used as a refrigerant, and a high-pressure side refrigerant is compressed exceeding a critical pressure.

  As shown in FIG. 1, the refrigeration cycle apparatus 1 includes a compressor 3 that compresses and discharges a refrigerant at a high temperature and a high pressure, and a high-temperature and high-pressure refrigerant gas fed from the compressor 3 and cooling air. A radiator 4 that cools the refrigerant gas by exchanging heat, a cooling unit 2 that is disposed upstream of the heater unit (not shown), dehumidifies and cools the air, hoses 6 and 7 that connect these components, and piping 11 and 12 and pipe joints 100A, 101 and 102.

  The compressor 3 is driven by the driving force of the vehicle travel engine via an electromagnetic clutch. Then, by receiving this driving force, the evaporator (not shown) in the cooling unit 2 draws the heat in the passenger compartment and sucks and compresses the low-temperature and low-pressure refrigerant gas, and the refrigerant gas becomes high-temperature and high-pressure. To the radiator 4.

  The refrigerant gas sent out from the compressor 3 passes through the high-pressure hose 6 connecting the compressor 3 and the radiator 4 and enters the radiator 4. The radiator 4 is a heat exchanger, and cools the refrigerant gas inside by the driving wind of the vehicle and the cooling air blown by the electric cooling fan.

  A cooling unit 2 is provided on the refrigerant outlet side of the radiator 4 via a pipe 11 and a pipe 12. The pipe 11 is a pipe connected to the radiator 4, and the pipe 12 is a pipe disposed between the pipe 11 and the cooling unit 2.

  The pipe 11 and the pipe 12 are connected by a pipe joint 100 </ b> A as a joint, and the outer surface of the pipe 12 is protected by a pipe protection member 8. The pipe 12 and the cooling unit 2 are connected by a pipe joint 101. An evaporator and an expansion valve (not shown) are accommodated in the cooling unit 2.

  The low-pressure gas-liquid two-phase refrigerant decompressed by the expansion valve is evaporated by the evaporator, thereby taking heat from the air passing through the outside of the evaporator, dehumidifying and cooling to cool air. The cooling air is blown into the vehicle as conditioned air.

  The outlet side of the cooling unit 2 and the inlet side of the compressor 3 are connected by a pipe 13 and a low pressure hose 7. The pipe 13 and the low-pressure hose 7 are connected by a pipe joint 102, and the outer surface of the pipe 13 is protected by a pipe protection member 9.

  Since the vibration system in which each component (2-4) is arrange | positioned in a vehicle engine room differs between the compressor 3 and the heat radiator 4, and between the cooling unit 2 and the compressor 3, it absorbs vibration. Therefore, the high pressure hose 6 and the low pressure hose 7 are used.

  The pipe protection members 8 and 9 are made of rubber and are attached so as to cover the circumferences of the pipes 12 and 13 that are generally aluminum tubes. The pipe protection members 8 and 9 protect the pipe against external impacts such as a collision of pebbles, improve the corrosion resistance of the pipe by preventing entry of water and mud, etc., and insulate the fluid in the pipe To do.

  The refrigeration cycle apparatus 1 can be provided with an accumulator that is provided between the compressor 3 and the evaporator and stores excess refrigerant and sends gas-phase refrigerant to the compressor. Furthermore, an internal heat exchanger for exchanging heat between the refrigerant flowing from the radiator 4 to the evaporator and the refrigerant flowing out of the evaporator can be provided.

  The pipe joints 100A, 101, and 102 provided in the refrigeration cycle apparatus 1 all have the same structure, and the configuration thereof will be described in detail below using the pipe joint 100A as a representative with reference to FIGS. . FIG. 2 is a cross-sectional view showing the pipe joint 100A, and FIG. 3 is a perspective view showing the first block 110. As shown in FIG.

  As shown in FIG. 2, the pipe joint 100A is a joint that connects the pipes 11 and 12, and includes a first block 110 as a first member and a second block 120 as a second member. Both blocks 110 and 120 are arranged to face each other, and are fastened by a bolt 140 as a fastening member, so that the insides of the pipes 11 and 12 respectively connected to the blocks 110 and 120 are communicated.

  The first block 110 is formed as a rectangular parallelepiped member made of an aluminum alloy (for example, A3004 series). In the first block 110, one end side (the right side in FIG. 2) of the first surface portion 111 located on the second block 120 side is orthogonal to the extending direction of the first surface portion 111 (the left-right direction in FIG. 2). A through hole 112 for the first pipe 11 is formed in the first surface portion 111 and has a first opening 113 on the first surface portion 111 side.

  The tip of the first pipe 11 made of an aluminum alloy (for example, A3005 series) is connected to the side opposite to the opening of the through hole 112 of the first block 110. The leading end of the first pipe 11 is inserted into the through hole 112 and fixed to the first block 110 by brazing, and the first pipe 11 is connected to communicate with the first opening 113.

  A circular concave counterbore 114 having a predetermined depth is formed on the outer periphery of the first opening 113. The predetermined depth of the spot facing portion 114 is set to a dimension that is approximately ½ of the thickness of a washer 130 described later. Also, the inner diameter dimension is set slightly larger than the outer diameter dimension of the washer 130.

  A first seal convex portion 115 as a first seal surface portion is formed on the bottom surface portion of the spot facing portion 114. The 1st seal convex part 115 is formed as a double annular convex seal face part which makes concentricity. The cross-sectional shape of the first seal protrusion 115 is formed in a triangular shape with a sharpened tip side.

  On the outer peripheral portion of the spot facing portion 114, an annular convex portion 116 protruding toward the second block 120 is formed in an annular shape.

  Here, when the joint surface L in the first surface portion 111 is used as a reference, the protruding tip (lower end in FIG. 2) of the first seal convex portion 115 is inside the first block 110 from the joint surface L (upper side in FIG. 2). The projecting tip (lower end in FIG. 2) of the annular convex portion 116 is disposed outside the first block 110 (lower side in FIG. 2) from the joint surface L.

  That is, in the first block 110, the protruding front end surface of the annular convex portion 116 is positioned closest to the second block 120, and the first seal convex portion 115 is recessed inside the annular convex portion 116. Placed in position.

  Further, a bolt insertion hole 117 for the bolt 140 is formed on the other end side (left side in FIG. 2) of the first block 110 so as to penetrate the first block 110 perpendicular to the first surface portion 111. Yes.

  Further, on one end side (the right side in FIG. 2) of the first surface portion 111, a pin hole 118 is formed on the end portion side of the first block 110 so as to be orthogonal to the first surface portion 111. An elongated rod-like positioning pin 118a is inserted and fixed in the pin hole 118 (see FIG. 3). The protruding tip (lower end in FIG. 2) of the positioning pin 118a protrudes toward the second block 120 as a convex portion.

  Similar to the first block 110, the second block 120 is formed as a rectangular parallelepiped member made of an aluminum alloy (for example, A3004 series). The second block 120 has a second surface portion 121 located on the first block 110 side and facing the first surface portion 111, and on one end side (right side in FIG. 2) of the second surface portion 121, A through hole 122 for the second pipe 12 is formed so as to be orthogonal to the extending direction of the second surface portion 121 (the left-right direction in FIG. 2), and the second opening portion 123 is formed on the second surface portion 121 side. Have.

  The tip of the second pipe 12 made of an aluminum alloy (for example, A3005 series) is connected to the side opposite to the opening of the through hole 122 of the second block 120. The distal end of the second pipe 12 is inserted into the through hole 122 and fixed to the second block 120 by brazing, and the second pipe 12 is connected to communicate with the opening 123.

  A second seal convex portion 125 is formed on the outer peripheral portion of the second opening 123 at a position facing the first seal convex portion 115 of the first block 110. Similar to the first seal projection 115, the second seal projection 125 is formed as a concentric double annular convex seal surface, and its cross-sectional shape is formed in a triangular shape with a sharpened tip side. ing.

  An annular recess 126 into which the annular projection 116 of the first block 110 can be inserted is formed on the outer peripheral portion of the outer second seal projection 125. The inner diameter of the annular recess 126 is smaller than the inner diameter of the annular protrusion 116, and the outer diameter of the annular recess 126 is set larger than the outer diameter of the annular protrusion 116.

  Further, on the other end side (the left side in FIG. 2) of the second block 120, the second block 120 passes through the second block 120 at a position corresponding to the bolt insertion hole 117 of the first block 110 and orthogonal to the plane portion 121. Thus, a female thread portion 127 for the bolt 140 is formed. The bolt 140 is inserted from the bolt insertion hole 117 of the first block 110 and is tightened by the female screw portion 127 of the second block 120, so that both the blocks 110 and 120 are fastened.

  Furthermore, on one end side of the second surface portion 121 of the second block 120, on the end portion side further than the second opening portion 123, a recess is formed so as to be orthogonal to the second surface portion 121 corresponding to the position of the positioning pin 118a. The pin hole 128 is formed in the middle of the thickness of the second block 120. The other end side of the positioning pin 118a is inserted into the pin hole 128, and the depth of the pin hole 128 is set larger (deeper) than the protruding amount on the other end side of the positioning pin 118a. Yes.

  A protrusion 129 is formed integrally with the second block 120 on the other end side (left side in FIG. 2) of the second surface portion 121 of the second block 120. The protrusion 129 has a rectangular cross section and protrudes toward the first block 110 facing the second surface 121 with a predetermined amount of protrusion, and extends along the other side of the second surface 121. Is formed.

  Here, the protruding front end (upper end in FIG. 2) of the second seal convex portion 125 is disposed so as to be inside the second block 120 (lower side in FIG. 2) from the joint surface L. In other words, on the left and right end sides of the second seal convex portion 125, the projecting planes 121a and 121b (projections of the projecting portion 129) are arranged so as to be outside the second block 120 with respect to the projecting tip of the second seal convex portion 125. (Tip surface) is formed.

  In an inner space (hereinafter referred to as “inner peripheral portion 116a”) formed by the inner peripheral surface of the annular convex portion 116, a metal washer 130 (hereinafter simply referred to as “washer”) as a seal member. Is intervened. The washer 130 is a soft material (for example, A1050 series of aluminum alloy) having a lower hardness than both the blocks 110 and 120, and is formed in a flat cylindrical shape. The two ring-shaped surfaces facing the thickness direction of the washer 130 form a seal surface 130a (a seal surface on the first block 110 side) and 130b (a seal surface on the second block 120 side).

  The thickness of the washer 130 is set to a dimension such that when the seal convex portions 115 and 125 are sandwiched between the seal convex portions 115 and 125, the end portions of the seal convex portions 115 and 125 bite into the seal surfaces 130a and 130b by a predetermined amount. The space between both blocks 110 and 120 is surely sealed.

  The washer 130 is held on the inner peripheral portion 116 a by the holding member 150. The holding member 150 is made of resin and has a cylindrical portion 151 (seal member holding portion) having a cylindrical shape and an outer flange formed in an outer flange shape continuously with one end (lower end in FIG. 2) of the cylindrical portion 151. Part 152 (tip surface cover part).

  The outer diameter of the cylindrical portion 151 is set slightly larger than the inner peripheral diameter of the annular convex portion 116, and the inner diameter of the cylindrical portion 151 is formed in the second block 120 by forming the annular concave portion 126. It is set larger than the diameter of the protruding surface (surface on which the second seal convex portion 125 is formed). At the time of assembly to the first block 110, the cylindrical portion 151 is press-fitted into the inner peripheral portion 116 a to a position where it comes into contact with the seal surface 130 b on the second block 120 side of the washer 130, and is annular with the outer peripheral surface of the cylindrical portion 151. The inner peripheral surface of the convex portion 116 is press-fitted and fitted.

  The thickness (the vertical width in FIG. 2) of the outer flange portion 152 is positioned with a predetermined clearance between the protruding front end surface (the lower surface in FIG. 2) of the annular convex portion 116 and the bottom surface of the annular concave portion 126 during press-fitting. It is formed in the size to be. Further, the extending length of the outer flange portion 152 (the width in the left-right direction in FIG. 2) is sufficiently large to cover the protruding tip surface of the annular convex portion 116 and be accommodated in the annular concave portion 126. .

(Assembly procedure)
Next, the procedure for assembling the pipe joint 100A in the above configuration will be described. First, the assembly operator brazes and fixes the first pipe 11 to the through hole 112 of the first block 110, and fixes the positioning pin 118 a to the pin hole 118. Further, the second pipe 12 is brazed and fixed to the through hole 121 of the second block 120.

  Next, the washer 130 is inserted into the inner peripheral portion 116 a of the first block 110. In this state, the washer 130 is not fixedly held. Next, the holding member 150 is inserted into the inner peripheral portion 116 a from the cylindrical portion 151 side, and press-fitted until the cylindrical portion 151 comes into contact with the seal surface 130 b of the washer 130. At this time, as described above, the holding member 150 is held by the inner peripheral portion 116 a by press-fitting the outer peripheral surface of the cylindrical portion 151 of the holding member 150 and the inner peripheral surface of the annular convex portion 116. Accordingly, in the washer 130, the outer portion 130c (the outer edge portion of the seal surface 130b in this embodiment) located on the radially outer side of the seal convex portions 115 and 125 is one end surface of the cylindrical portion 151 (the upper end surface in FIG. 2). As a result, the washer 130 is also held by the inner peripheral portion 116a.

  Next, the second surface portion 121 of the second block 120 is disposed so as to face the first surface portion 111 of the first block 110, and the positioning pin 118 a is inserted into the annular recess 126 while the positioning pin 118 a is pinned. Insert into the hole 128.

  At this time, the first block 110 and the second block 120 are positioned by engaging at two locations of the annular convex portion 116 and the positioning pin 118a, and the positions of the insertion hole 117 and the female screw portion 127 are substantially the same axis. It comes to agree with. Then, the bolts 140 are inserted from the bolt insertion holes 117 and fastened to the female threaded portion 127, whereby both the blocks 110 and 120 are fastened to form the pipe joint 100A.

  When tightening with the bolt 140, first, the other end side (the left side in FIG. 2) of the first surface portion 111 abuts against the projecting tip surface of the opposing projecting portion 129, and between the two flat surface portions 111 and 121. A gap 160 is formed on one end side (the right side in FIG. 2). When the tightening of the bolt 140 is advanced, both the blocks 110 and 120 are deformed so that the gap 160 on one end side (the right side in FIG. 2) is bent in the direction in which the protrusion 129 is a fulcrum. Therefore, a surface pressure is effectively generated also on the washer 130 separated from the bolt 140 in the surface direction of the flat portions 111 and 121 (left and right direction in FIG. 2), and the seal convex portions 115 and 125 are respectively sealed on the seal surface 130a of the washer 130. 130b, the washer 130 is deformed so as to fit the seal projections 115 and 125, and the blocks 110 and 120 are sealed, so that the first pipe 11 and the second pipe 12 are reliably communicated with each other. .

(effect)
In this embodiment, in order to hold the washer 130 on the inner peripheral portion 116a of the annular convex portion 116, it is not necessary to fit the holding member 150 to the inner peripheral portion of the washer 130. It can be formed inside the openings 113 and 123 of both the blocks 110 and 120. That is, the diameters of the seal projections 115 and 125 can be reduced, and when the blocks 110 and 120 are fastened by the bolt 140, the tightening torque can be reduced, and the assembly workability can be improved.

  In addition, the second seal convex portion 125 is formed at a position deeper apart from the projecting planes 121a and 121b with respect to the first block 110, while the first seal convex portion 115 has an annular shape on the outer peripheral portion thereof. The protrusion 116 is formed so as to protrude from the inside of the first block 110. For this reason, the external force during handling during the production of each block 110, 120, during handling, etc., or the block on one side during assembly, etc. directly hits the seal projections 115, 125 formed on the other block. This can prevent the seal protrusions 115 and 125 from being damaged. As a result, the possibility of seal leakage at the damaged seal projections 115 and 125 can be reduced.

  Furthermore, in the above embodiment, the holding member 150 can be easily held on the inner peripheral portion 116a by pressing the cylindrical portion 151 of the holding member 150 into the inner peripheral portion 116a of the annular convex portion 116, and further assembly work can be performed. Can be improved. Further, there is no need to adopt a special fixing structure by another member between the holding member 150 and the annular convex portion 116, and the configuration is easy.

  Further, when the blocks 110 and 120 are assembled, they are positioned in the extending direction of the planes 111 and 121 (the left-right direction in FIG. 2) in order to assemble them so that they are engaged at two locations of the pin 118a and the annular convex portion 116. This block can be prevented from rotating (displaced) with respect to the other block. As a result, even when the bolt 140 is fastened, any of the blocks 110 and 120 are not rotated around the bolt 140, and the assembly work can be performed smoothly.

  Further, the outer flange portion 152 of the holding member 150 covers the protruding tip surface of the annular convex portion 116. Therefore, when the annular convex portion 116 is inserted into the annular concave portion 126, the second seal convex portion 125 comes into contact with the metallic (aluminum) annular convex portion 116 of the first block 110 and is damaged. Can be prevented. That is, since the holding member 150 is made of resin, even when the second seal convex portion 125 comes into contact, the scratches can be minimized, and seal failure can be suppressed.

  Furthermore, since the holding member 150 is made of resin, it can be easily deformed and can easily follow the shape tolerance on the blocks 110 and 120 side.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a cross-sectional view showing a pipe joint 100B in the second embodiment. 5A and 5B are diagrams showing the holding member 150B in the second embodiment, where FIG. 5A is a vertical sectional view and FIG. 5B is a plan view.

  In the present embodiment, the same reference numerals as those in the first embodiment are assigned to the constituent members common to the first embodiment, and the description below will focus on differences from the first embodiment. To do. The same applies to the following embodiments. In the present embodiment, since only the configuration of the holding member 150B is different from the first embodiment, the configuration of the holding member 150B will be described in detail below.

  As shown in FIGS. 5A and 5B, the holding member 150B has a cylindrical portion 151 and an outer flange portion 152, as in the first embodiment. On one end side (upper end side) of the cylindrical portion 151 where the outer flange portion 152 is not formed, a plurality of (four in the present embodiment) clamping portions 153 that clamp the outer periphery of the washer 130 are formed at equal intervals in the circumferential direction. Has been.

  The sandwiching portion 153 has two projecting pieces 153a and 153b that are projected from the inner peripheral surface of the cylindrical portion 151 to the radially inner side with a predetermined projecting amount. The formation position of the upper protruding piece 153a coincides with the upper end surface of the cylindrical portion 151, and the lower protruding piece 153b is formed at an interval of the thickness of the washer 130 from the protruding piece 153a.

  The predetermined protruding amount of the protruding pieces 153a, 153b is the holding member when the washer 130 is inserted from above with the holding member 150B (cylindrical portion 151) being slightly elastically deformed radially outward and expanded. The amount of protrusion is such that 150B (cylindrical portion 151) is elastically restored and the washer 130 can be fitted between the upper and lower protruding pieces 153a, 153b.

  Further, at a substantially intermediate position in the extending direction (vertical direction) of the cylindrical portion 151, a pressure contact projection 151a having a semicircular cross section is formed in an annular shape so that the apex side of the semicircular shape protrudes outward. ing. At the time of assembly, the apex portion of the pressure contact projection 151 a which is a part of the cylindrical portion 151 is press-fitted to the inner peripheral surface of the annular convex portion 116.

  According to the present embodiment having the above-described configuration, the washer 130 is fitted to the holding portion 153, so that the washer 130 can be integrated with the holding member 150B. Thus, at the time of assembly, the holding member 150B is not press-fitted after the washer 130 is inserted into the inner peripheral portion 116a alone, but the holding member 150B with the washer 130 integrated is moved from the cylindrical portion 151 side to the inner peripheral portion 116a. By inserting, the washer 130 and the holding member 150B can be assembled to the first block 110 at a time.

  That is, at the time of assembly, the washer 130 does not fall off from the inner peripheral portion 116a, and the assembly operation can be performed easily. Further, the assembly process can be reduced.

  Furthermore, when the holding member 150B is press-fitted from the cylindrical portion 151 side into the inner peripheral portion 116a, the apex portion of the pressing protrusion 151a is not in contact with the inner peripheral surface of the annular convex portion 116, but the entire outer peripheral surface of the cylindrical portion 151. Since the fitting is continued, pressure input of the holding member 150B to the inner peripheral surface of the annular convex portion 116 can be suppressed. Thereby, assembly workability | operativity can be improved.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view showing a pipe joint 100C in the third embodiment. In the present embodiment, since only the configuration of the holding member 150C is different from the first embodiment, the configuration of the holding member 150C will be described in detail below.

  As shown in FIG. 6, the holding member 150 </ b> C includes a cylindrical portion 151 and an outer flange portion 152, as in the above embodiments. Water-tight seal protrusions 155a and 155b (water-tight seal convex portions) having a semicircular cross section are formed on both surfaces (upper and lower surfaces in FIG. 6) at substantially the intermediate position in the extending direction of the outer flange portion 152 (left and right direction in FIG. 6). However, it is formed in an annular shape so that its semicircular apex side protrudes.

  In addition, after fastening with the bolt 140, each of the watertight seal projections 155a and 155b is pressed between the annular convex portion 116 and the annular concave portion 126. That is, the apex portion of the watertight seal projection 155 a is in pressure contact with the protruding tip surface of the annular protrusion 116, and the apex portion of the watertight seal projection 155 b is in pressure contact with the bottom surface of the annular recess 126.

  Therefore, according to the present embodiment, water or the like from the gap 160 between the blocks 110 and 120 is interposed in the portion where the washer 130 defined by the annular protrusion 116, the annular recess 126, and the watertight seal protrusions 155a and 155b is interposed. Therefore, it is possible to prevent the sealing performance from being deteriorated due to the corrosion of the seal convex portions 115 and 125.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. FIG. 7 is a cross-sectional view showing a pipe joint 100D in the fourth embodiment. In the present embodiment, the configuration of the first block 110D and the configuration of the holding member 150D are different from those of the above embodiments, and will be described in order.

  FIG. 8 is a perspective view showing the first block 110D of the present embodiment. As shown in FIGS. 7 and 8, an O-ring groove 119 that is recessed toward the inner diameter side is formed in an annular shape on the outer peripheral surface of the annular convex portion 116 of the first block 110. An O-ring 170 (watertight annular member) is mounted in the O-ring groove 119 so as to seal between the outer peripheral surface of the annular convex portion 116 and the inner peripheral surface of the annular concave portion 126 facing the outer peripheral surface. I have to.

  As shown in FIG. 7, the holding member 150 </ b> D includes a cylindrical portion 151 and an outer flange portion 152 as in the above embodiments. An inner flange portion 156 formed in an inner flange shape is extended from an end portion (upper end portion in FIG. 7) of the cylindrical portion 151 opposite to the outer flange portion 152. The extension length (inward protruding length) is set to a length that does not contact the second block 120.

  Further, a return portion 157 (outer peripheral cover portion) that is bent toward the first block 110 side (O-ring 170 side) at an angle of 90 degrees from the outer flange portion 152 is suspended from the outer end portion of the outer flange portion 152. Has been. The return portion 157 is set to the same length as the length from the protruding front end surface of the annular convex portion 116 to the O-ring groove 119. Therefore, at the time of assembly, the annular convex portion 116 is covered with the outer flange portion 152 at the protruding tip surface, and is covered with the return portion 157 from the protruding tip surface to the O-ring 170.

  In the present embodiment, the O-ring 170 can prevent water or the like from entering the gap 160 between the both blocks 110 and 120, and can prevent deterioration in seal performance due to corrosion of the seal convex portions 115 and 125.

  Further, the annular convex portion 116 of the first block 110 does not contact the watertight seal surface 126a (a part of the outer peripheral surface of the annular concave portion 126) in the second block 120 that is in pressure contact with the O-ring 170 during assembly. . That is, the return portion 157 functions as a cover for the annular convex portion 116, and the annular convex portion 116 having a high hardness is not in contact with the seal convex portion 125 of the second block 120. Since the holding member 150D comes into contact, the watertight seal surface 126a can be effectively protected to prevent scratches.

  Further, the contact area with the washer 130 can be adjusted by the inner flange portion 156. Furthermore, if the extended length (abutting area) of the inner flange portion 156 is set large within a range not contacting the second block 120, the washer 130 can be stably held on the inner peripheral portion 116a.

(Other embodiments)
In the said 1st, 2nd embodiment, you may comprise only the cylindrical part 151, without forming the outer flange part 152 of the holding members 150 and 150B. According to this configuration, the holding members 150 and 150B can be easily formed. In addition, material costs can be reduced.

  In the holding member 150B of the second embodiment, the watertight seal protrusions 155a and 155b in the third embodiment may be formed.

  In the holding member 150B of the second embodiment, the pressure contact protrusion 151a is formed on the cylindrical portion 151. You may make it press-fit with the internal peripheral surface of the part 116. FIG.

  In the second embodiment, the washer 130 is held by the holding portion 153 of the holding member 150B. However, the washer 130 and the holding member 150B may be integrally formed by two-color molding, for example. Moreover, it is good also as integral molding similarly about other embodiment.

  In 1st, 3rd, 4th embodiment, you may employ | adopt the clamping part 153 in 2nd Embodiment. In addition, in each of the above-described embodiments, the combination according to the presence / absence of the holding portion 153, the watertight seal projections 155a and 155b, the pressure contact projection 151a, and the inner flange portion 156 can be appropriately changed in design.

  In each of the above-described embodiments, the holding members 150, 150B, 150C, and 150D are made of resin, but are not limited thereto, and may be rubber, a metal having low hardness, or the like.

  In each of the above embodiments, each of the seal projections 115 and 125 is formed in a double manner, but may be formed in a single layer or a plurality of triple or more. Moreover, although the cross-sectional shape of each seal | sticker convex part 115,125 was made into the triangular shape, it is good also as other shapes, such as a semicircle shape.

  In each of the above embodiments, the holding member 150, 150B, 150C, 150D is held by the inner peripheral portion 116a by press-fitting the cylindrical portion 151 and the annular convex portion 116. You may comprise so that it may hold | maintain by fitting. For example, a convex portion is provided on the outer peripheral surface of the cylindrical portion 151, and a concave portion is provided at a corresponding position on the inner peripheral surface of the annular convex portion 116. According to this configuration, when the cylindrical portion 151 is inserted into the inner peripheral portion 116a, the convex portion can be fitted into the concave portion and the holding member can be held. Moreover, you may make it hold | maintain by the structure of another fitting and engagement.

It is the external view which showed the structure of the refrigerating-cycle apparatus provided with the piping joint in 1st Embodiment. It is sectional drawing which shows the piping joint in 1st Embodiment. It is a perspective view which shows the 1st block in 1st Embodiment. It is sectional drawing which shows the piping joint in 2nd Embodiment. It is a figure which shows the holding member in 2nd Embodiment, Comprising: (a) is a vertical sectional view, (b) is a top view. It is sectional drawing which shows the piping joint in 3rd Embodiment. It is sectional drawing which shows the piping joint in 4th Embodiment. It is a perspective view which shows the 1st block in 4th Embodiment.

Explanation of symbols

11 1st piping 12 2nd piping 110,110D 1st block (1st member)
111 1st surface part 113 1st opening part 115 1st seal | sticker convex part (1st seal | sticker surface part)
116 annular convex part 116a inner peripheral part (inside of annular convex part)
120 Second block (second member)
121 2nd surface part 121a, 121b Projection plane 123 2nd opening part 125 2nd seal convex part (2nd seal surface part)
126 annular recess 126a watertight sealing surface (inner wall of annular recess)
130 Metal washer (seal member)
130c Outer part 140 Bolt (fastening member)
150, 150B, 150C, 150D
151 Cylindrical part (seal member holding part)
152 Outer flange (front end cover)
155a, 155b Watertight seal protrusion (watertight seal projection)
157 Return part (outer part cover part)
170 O-ring (watertight annular member)

Claims (10)

A first member (110) to which an end of the first pipe (11) is connected so as to communicate with the first opening (113);
A second member (120) to which an end of the second pipe (12) is connected so as to communicate with the second opening (123);
An annular seal member (130) interposed between the two members (110, 120) so as to allow the two openings (113, 123) to communicate with each other. 110, 120) are fastened together, and both the pipes (11, 12) are communicated with each other through the openings (113, 123) and the seal member (130).
The first member (110) is
A first seal surface portion (115) that is formed in a ring shape on the outer periphery of the first opening (113) and ensures sealing performance with the seal member (130);
An annular convex portion (116) which is annularly disposed on the outer peripheral portion of the first seal surface portion (115) and is formed to protrude from the projecting height of the first seal surface portion (115) in the outer region of the seal member (130). ) And
The second member (120)
A second seal surface portion (125) that is formed in an annular shape on the outer periphery of the second opening (123) and ensures sealing performance with the seal member (130);
An annular recess (126) provided in the outer peripheral portion of the second seal surface portion (125) and recessed to accommodate the annular projection (116);
An outer portion (inserted and fixed to the inner side (116a) of the annular convex portion (116) and located radially outside the portion of the seal member (130) where both the seal surface portions (115, 125) abut. And a holding member (150) having a seal member holding portion (151) for holding the seal member (130) on the inner side (116a) of the annular convex portion (116) in contact with 130c). Fittings.   Projection planes (121a, 121b) arranged on the outer periphery of the second seal surface portion (125) so as to be outside the second member (120) with respect to the projecting tip of the second seal surface portion (125). The pipe joint according to claim 1, wherein the pipe joint is formed.   The pipe joint according to claim 1 or 2, wherein the seal member holding portion (151) has a cylindrical shape and is press-fitted into an inner side (116a) of the annular convex portion (116).   The holding member (150) is provided with an annular tip surface cover portion (152) that is provided continuously to the seal member holding portion (151) and covers the protruding tip surface of the annular convex portion (116). The pipe joint according to any one of claims 1 to 3, wherein the pipe joint is provided. The holding member (150) is provided with an annular tip surface cover portion (152) that is provided continuously to the seal member holding portion (151) and covers the protruding tip surface of the annular convex portion (116). And
The pipe joint according to claim 3, wherein the tip surface cover portion (152) is formed in an outer flange shape extending outward from an end surface of the seal member holding portion (151).   The holding member (150B) is formed with a holding portion (153) for holding the both end faces of the seal member (130) at an outer peripheral portion of the seal member (130). The piping joint according to any one of claims 1 to 5.   The pipe joint according to any one of claims 1 to 6, wherein the seal member (130) and the holding member (150B) are integrally formed.   At least one of the holding member (150C), the annular convex portion (116), and the annular concave portion (126) is watertightly sealed between the annular convex portion (116) and the annular concave portion (126). The pipe joint according to any one of claims 1 to 7, wherein a watertight seal convex portion (155a, 155b) is formed. A watertight annular member (170) that seals between the inner wall (126a) of the annular recess (126) facing the outer periphery is mounted on the outer periphery of the annular protrusion (116),
The holding member (150D) includes an outer peripheral cover portion (157) that covers the outer peripheral portion of the annular convex portion (116) from the protruding side of the annular convex portion (116) toward the watertight annular member (170). ) Is formed, The pipe joint according to any one of claims 1 to 8.   The seal member (130) is made of a soft metal having a lower hardness than the two members (110, 120), and the holding member (150) is made of resin. The piping joint according to any one of 9.

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