JP4061513B2 - Packing type fittings - Google Patents

Packing type fittings Download PDF

Info

Publication number
JP4061513B2
JP4061513B2 JP01469298A JP1469298A JP4061513B2 JP 4061513 B2 JP4061513 B2 JP 4061513B2 JP 01469298 A JP01469298 A JP 01469298A JP 1469298 A JP1469298 A JP 1469298A JP 4061513 B2 JP4061513 B2 JP 4061513B2
Authority
JP
Japan
Prior art keywords
packing
pipe
diameter
retainer
compression
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP01469298A
Other languages
Japanese (ja)
Other versions
JPH11210951A (en
Inventor
一三 加藤
正教 水谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Metals Ltd
Original Assignee
Hitachi Metals Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP01469298A priority Critical patent/JP4061513B2/en
Publication of JPH11210951A publication Critical patent/JPH11210951A/en
Application granted granted Critical
Publication of JP4061513B2 publication Critical patent/JP4061513B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/04—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Sleeves (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は管同士を気密に保持して接続するパッキンを用いたパッキン型管継手に関するものである。
【０００２】
【従来の技術】
従来、継手本体内にパッキンと共に管の表面に係止する硬質の抜止リングを装着し、継手本体に螺合するナットで抜止リングと共にパッキンを圧縮し、シールと管の抜止めを同時に行う管継手が知られている。
【０００４】
【発明が解決しようとする課題】
しかしながら上記の管継手では、接続後において管に引抜き力が作用した場合、管の移動に伴い抜止めリングが継手内で移動し、管表面により強く係止して管が引抜かれるのを防止するが、抜止リングの継手内での移動によってパッキンの初期の圧縮力が低下し、そのためにパッキンの気密保持性能が低下し漏れたりする問題があった。
また抜止リングは通常複雑な形状をしているため製造上の問題があり、更にこの複雑な抜止リングを継手内に装着するために継手本体が大きくまた重くなり、更に部品点数が多くなって接続時の施工が複雑になる等の問題があった。
本発明は上記の問題点を解消するためになされたものであって、管に引抜き力が作用してもパッキンのシール性を損なわず、部品点数を少なくしてコンパクトで施工性の良いパッキン型管継手を提供するものである。
【０００５】
【課題を解決するための手段】
本発明の要旨は、接続する管の端部に外嵌して管同士を気密に接続する継手本体とパッキンとナット部材とからなる管継手において、
前記継手本体は、中央部内面から順に接続管が挿通する貫通孔と、パッキンが装着される小径環状部と段部と大径環状部とを有し、さらにナット部材が螺合する雌ねじとを有し、
前記パッキンは、前記継手本体の小径環状部に装着できる環状のシール部と、前記大径環状部に装着してナット部材に押圧される環状の圧縮部と、該シール部と圧縮部の間に保持されて前記段部に係止するリテーナとを有するとともに、前記リテーナの外径は前記圧縮部の外径と近似し、前記リテーナの内径は前記シール部及び前記圧縮部の内径よりも大きく形成され、
前記パッキンの端部にカラーを装着して前記ナット部材を締付けることにより接続することを特徴とするパッキン型管継手である。
【０００６】
【作用】
本発明は上記の構成であるから、継手本体内に管を装着しナット部材を締付けることにより、前記パッキンの端部がカラーを介して押圧され、パッキンに保持されているリテーナが継手本体の段部に係止する。このためパッキンの圧縮部がリテーナとナット部材間で圧縮されて管の表面を強固に圧縮し管を抜止め保持する。またパッキンのシール部は前記リテーナが段部に係止されるため、適度な所定のシール圧力を受けて保持される。特にリテーナが段部に係止することによって、それ以上移動されないからパッキン奥側のシール部は適度な圧縮力を保持して管との間をシールする。また管に引抜け力が作用して継手内で移動が生じても、パッキン圧縮部の大きな圧縮作用によってパッキンシール部の圧縮力が低下せず、管の移動に伴うシール部の圧縮力低下が生じない。またパッキン内にリテーナが保持されているので接続時の作業性が良い。
【０００７】
【発明の実施形態】
以下本発明の実施例について図面を参照して説明する。
図１は本発明の一実施例を示す管を接続した状態を示し、継手本体１の端部内面にナット２が螺合する雌ねじ１１を有す。その奥にはパッキン３が装着される大径環状部１２と段部１３を有して小径環状部１４を有す。この大径環状部１２と小径環状部１４は平行内面で、この中間部に傾斜する段部１３で連続したパッキン装着部を形成している。小径環状部１４の奥側は接続する管６が挿通する内径の貫通孔１５になっている。尚、段部１３は直角の壁であってもよい。
【０００８】
パッキン３は前記継手本体１の小径環状部１４に装着するシール部３１と大径環状部１４に装着する圧縮部３２とこのシール部３１と圧縮部３２間に挟着して保持した環状金属製のリテーナ３３とからなる。リテーナ３３の外径は略圧縮部３２の外径と近似しており、前記継手本体の段部１３に係止される。内径はパッキン３の内径よりも大きく、従ってシール部３１と圧縮部３２は連続した一体の弾性を有すゴムで形成されている。
【０００９】
パッキン３の端部にはカラー５を装着してあり、ナット２は継手本体の雌ねじ１１に螺合するおねじ２１を有し、端部に継手本体１の外径とほぼ同じ寸法の六角部２２を設けてある。
ナット２を継手本体１に締付けることにより、ナット２の端部２３がカラー５を介してパッキン３を継手の内奥部へ押圧する。パッキン３はそのシール部３１を適度に圧縮した状態でリテーナ３３が段部１３に係止されるので、圧縮部３２が大きな圧縮力を受けて管６の表面を強固に圧縮し、管を抜止め保持する。
【００１０】
管６を接続した後、管に引抜け力が作用して継手内で移動しても、パッキン圧縮部３２の圧縮力が低下せずに管を保持し、また圧縮部３２の大きな圧縮力でシール部３１のシールに必要な適正な圧縮力が低下しない。このため長期にわたって適正な管の保持力と良好な気密性能を保持する。
また継手本体１の内面は接続管６を挿通できる貫通孔１５に設けてあるため、例えば接続する管６が両側共配管され固定した状態の最終的に接続する部分であっても、管６に継手本体を挿通して移動させることによって、容易に接続管６を突合せ接続することができる。
また従来のパッキン型管継手に比べて部品点数が少なく、継手全体をコンパクトに形成でき重量も軽減できるため、配管の施工性が良い。
【００１１】
【発明の効果】
以上説明の通り本発明は、管に引抜き力が作用して移動が生じても常に良好なシール性を保持し、また管を保持する。更に部品点数が少なくて済み、コンパクトに形成できて施工性に優れたパッキン型管継手である。
【図面の簡単な説明】
【図１】 本発明の一実施例の接続状態を示す半断面図である。
１ 継手本体 ２ ナット
３ パッキン ５ カラー
６ 管 １１ 雌ねじ
１２ 大径環状部 １３ 段部
１４ 小径環状部 １５ 貫通孔
２１ おねじ ２２ 六角部
２３ 端部 ３１ シール部
３２ 圧縮部 ３３ リテーナ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packing type pipe joint using a packing for holding and connecting pipes in an airtight manner.
[0002]
[Prior art]
Conventionally, a fitting that has been fitted with a hard retaining ring that locks onto the surface of the pipe together with the packing inside the joint body, and the packing is compressed together with the retaining ring with a nut that is screwed into the joint body, so that the seal and the pipe are prevented from being removed simultaneously It has been known.
[0004]
[Problems to be solved by the invention]
However, in the above-described pipe joint, when a pulling force acts on the pipe after connection, the retaining ring moves within the joint as the pipe moves, and the pipe surface is strongly locked to prevent the pipe from being pulled out. However, the movement of the retaining ring within the joint reduces the initial compressive force of the packing, which causes a problem that the hermetic holding performance of the packing deteriorates and leaks.
In addition, since the retaining ring is usually in a complicated shape, there are manufacturing problems. In addition, the fitting body becomes larger and heavier in order to mount this complicated retaining ring in the joint, and the number of parts is increased. There were problems such as complicated construction at the time.
The present invention has been made to solve the above-mentioned problems, and does not impair the sealing performance of the packing even when a pulling force is applied to the tube, and reduces the number of parts and is compact and has good workability. A pipe joint is provided.
[0005]
[Means for Solving the Problems]
The gist of the present invention is a pipe joint comprising a joint body, a packing, and a nut member that are externally fitted to the ends of the pipes to be connected to connect the pipes in an airtight manner.
The joint body has a through hole connecting pipe from the central portion inner surface is sequentially inserted, packing and a small-diameter annular portion and a stepped portion and the large diameter annular portion to be mounted, and a female screw further nut member is screwed Have
The packing includes an annular seal portion that can be attached to the small-diameter annular portion of the joint body, an annular compression portion that is attached to the large-diameter annular portion and is pressed against the nut member, and the seal portion between the seal portion and the compression portion. as well as have a retainer to lock the stepped portions are retained, the outer diameter of the retainer is close to the outer diameter of the compression portion, the inner diameter of the retainer is larger than an inner diameter of the seal portion and the compression unit Formed,
A packing type pipe joint, wherein a collar is attached to an end portion of the packing and the nut member is tightened to make a connection.
[0006]
[Action]
Since the present invention has the above-described configuration, the end of the packing is pressed through the collar when the pipe is mounted in the joint body and the nut member is tightened, and the retainer held by the packing is the step of the joint body. Lock to the part. For this reason, the compression part of packing is compressed between a retainer and a nut member, compresses the surface of a pipe | tube firmly, and hold | maintains a pipe | tube from retaining. Further, since the retainer is locked to the stepped portion, the seal portion of the packing is held by receiving an appropriate predetermined sealing pressure. In particular, since the retainer is locked to the stepped portion, the seal portion on the back side of the packing maintains an appropriate compressive force and seals between the pipes because the retainer is not moved further. Also, even if the pull-out force acts on the pipe and movement occurs in the joint, the compression force of the packing seal part does not decrease due to the large compression action of the packing compression part, and the compression force of the seal part decreases as the pipe moves. Does not occur. Further, since the retainer is held in the packing, workability at the time of connection is good.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a state in which a pipe showing an embodiment of the present invention is connected, and has an internal thread 11 into which a nut 2 is screwed onto an inner surface of an end of a joint body 1. In the back, there is a large-diameter annular portion 12 to which the packing 3 is mounted and a step portion 13, and a small-diameter annular portion 14. The large-diameter annular portion 12 and the small-diameter annular portion 14 are parallel inner surfaces, and a continuous packing mounting portion is formed by a stepped portion 13 that is inclined at the intermediate portion. The inner side of the small-diameter annular portion 14 is a through-hole 15 having an inner diameter through which the connecting pipe 6 is inserted. The step portion 13 may be a right-angle wall.
[0008]
The packing 3 is made of an annular metal that is held between the seal portion 31 attached to the small-diameter annular portion 14 of the joint body 1, the compression portion 32 attached to the large-diameter annular portion 14, and the seal portion 31 and the compression portion 32. And the retainer 33. The outer diameter of the retainer 33 is approximately similar to the outer diameter of the compression portion 32 and is locked to the step portion 13 of the joint body. The inner diameter is larger than the inner diameter of the packing 3, and therefore the seal portion 31 and the compression portion 32 are formed of rubber having continuous and integral elasticity.
[0009]
A collar 5 is attached to the end of the packing 3, the nut 2 has a male screw 21 that engages with the female thread 11 of the joint body, and a hexagonal part having the same dimensions as the outer diameter of the joint body 1 at the end. 22 is provided.
By tightening the nut 2 to the joint main body 1, the end 23 of the nut 2 presses the packing 3 to the inner back of the joint via the collar 5. In the packing 3, the retainer 33 is locked to the step portion 13 in a state where the seal portion 31 is appropriately compressed. Therefore, the compression portion 32 receives a large compressive force and compresses the surface of the tube 6 firmly, and the tube is pulled out. Stop and hold.
[0010]
Even after the pipe 6 is connected, even if a pulling force acts on the pipe and moves in the joint, the compressing force of the packing compressing portion 32 is not lowered and the pipe is held, and the compressing portion 32 has a large compressive force. The appropriate compressive force required for sealing the seal portion 31 does not decrease. For this reason, an appropriate tube holding force and good airtightness are maintained over a long period of time.
Further, since the inner surface of the joint body 1 is provided in the through-hole 15 through which the connection pipe 6 can be inserted, even if the pipe 6 to be connected is a pipe to be connected to both sides and fixed, The connecting pipe 6 can be easily butt-connected by inserting and moving the joint body.
Moreover, since the number of parts is smaller than that of the conventional packing-type pipe joint, and the entire joint can be formed compactly and the weight can be reduced, the workability of piping is good.
[0011]
【The invention's effect】
As described above, the present invention always maintains a good sealing property and holds the pipe even if the pulling force acts on the pipe to cause movement. Furthermore, it is a packing type pipe joint that requires only a small number of parts, can be compactly formed, and has excellent workability.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing a connection state of an embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Joint body 2 Nut 3 Packing 5 Collar 6 Pipe 11 Female thread 12 Large diameter annular part 13 Step part 14 Small diameter annular part 15 Through hole 21 Male thread 22 Hexagon part 23 End part 31 Seal part 32 Compression part 33 Retainer

Claims (1)

接続する管の端部に外嵌して管同士を気密に接続する継手本体とパッキンとナット部材とからなる管継手において、
前記継手本体は、中央部内面から順に接続管が挿通する貫通孔と、パッキンが装着される小径環状部と段部と大径環状部とを有し、さらにナット部材が螺合する雌ねじとを有し、
前記パッキンは、前記継手本体の小径環状部に装着できる環状のシール部と、前記大径環状部に装着してナット部材に押圧される環状の圧縮部と、該シール部と圧縮部の間に保持されて前記段部に係止するリテーナとを有するとともに、前記リテーナの外径は前記圧縮部の外径と近似し、前記リテーナの内径は前記シール部及び前記圧縮部の内径よりも大きく形成され、
前記パッキンの端部にカラーを装着して前記ナット部材を締付けることにより接続することを特徴とするパッキン型管継手。In a pipe joint consisting of a joint body, a packing, and a nut member that are externally fitted to the end of the pipe to be connected and connect the pipes in an airtight manner,
The joint body has a through hole connecting pipe from the central portion inner surface is sequentially inserted, packing and a small-diameter annular portion and a stepped portion and the large diameter annular portion to be mounted, and a female screw further nut member is screwed Have
The packing includes an annular seal portion that can be attached to the small-diameter annular portion of the joint body, an annular compression portion that is attached to the large-diameter annular portion and is pressed against the nut member, and the seal portion between the seal portion and the compression portion. as well as have a retainer to lock the stepped portions are retained, the outer diameter of the retainer is close to the outer diameter of the compression portion, the inner diameter of the retainer is larger than the inside diameter of the sealing portion and the compression unit Formed,
A packing type pipe joint, wherein a collar is attached to an end of the packing and the nut member is tightened to connect.
JP01469298A 1998-01-27 1998-01-27 Packing type fittings Expired - Fee Related JP4061513B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP01469298A JP4061513B2 (en) 1998-01-27 1998-01-27 Packing type fittings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP01469298A JP4061513B2 (en) 1998-01-27 1998-01-27 Packing type fittings

Publications (2)

Publication Number Publication Date
JPH11210951A JPH11210951A (en) 1999-08-06
JP4061513B2 true JP4061513B2 (en) 2008-03-19

Family

ID=11868254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP01469298A Expired - Fee Related JP4061513B2 (en) 1998-01-27 1998-01-27 Packing type fittings

Country Status (1)

Country Link
JP (1) JP4061513B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003074771A (en) * 2001-09-04 2003-03-12 Nippon Kokan Pipe Fittings Mfg Co Ltd Heat-resistant pipe joint
US20150069753A1 (en) * 2013-09-10 2015-03-12 Maroko Limited Advancements in mechanical sealing apparatus
KR102157369B1 (en) * 2019-05-14 2020-09-17 최무성 Apparatus for connecting pipe
CN112303077B (en) * 2020-09-27 2022-03-04 江苏科信光电科技有限公司 PVC (polyvinyl chloride) pipe for connecting parts

Also Published As

Publication number Publication date
JPH11210951A (en) 1999-08-06

Similar Documents

Publication Publication Date Title
US3591208A (en) Pressure fitting for plastic tubing
US3501171A (en) Connector assembly for fluid conduits
US3615109A (en) Coupler fitting for use with both vacuum and pressure systems
AU4245697A (en) Flow line coupling
JP4061513B2 (en) Packing type fittings
WO2011011591A4 (en) Connection assembly comprising barbed tubing connector and shell
US5104151A (en) Coupler apparatus for connecting a conduit to an equipment opening having damaged threads
JP2565777Y2 (en) Mechanical coupling
CN109326994A (en) Pipe line parts for location of moisture
CN209743820U (en) Quick joint for floor heating pipe
JPH07103379A (en) Flexible pipe joint
DE60114560D1 (en) IMPROVED SEALING ELEMENT FOR PIPE CONNECTION
CN217153419U (en) Hose seal installation structure
JP2002048275A (en) Tube fitting
CN2644837Y (en) Spigot-and-socket pipe-line connecting member with binding ring locking arrangement
JPH08145251A (en) Pipe connecting device
CN216768637U (en) Expansion type connecting structure of pipe fitting and loose joint
KR200252276Y1 (en) Packing for pipe connecter
JP2002181261A (en) Bell-and-spigot pipe joint and riser piping structure
CN2503294Y (en) Extrusion pipe joint apparatus
CN212900233U (en) Pipeline connecting device for preventing pressure release for ship refrigeration equipment
JP3665847B2 (en) Structure that seals the connection end of the synthetic resin tube in an airtight or liquid tight manner
CN219453193U (en) High negative pressure gas pipeline connection structure
JP4421554B2 (en) Pipe sealing jig
JP4798332B2 (en) Resin pipe connection structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040928

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20070725

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070803

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070925

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20071129

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20071212

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110111

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110111

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120111

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130111

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130111

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees