JPS6084488A - Pipe joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a pipe joint for joining the ends of pipes.

The invention has particular application to pipe fittings of the type described, for example, in British Patent Nos. 1373 Tagj, 2033jf/za and 2//333j. The pipe joint in this specification has a bottle member having a truncated conical outer circumferential surface and a tubular box member having a truncated conical inner circumferential surface,
The inner circumferential surface of the box member corresponds to the outer circumferential surface of the bottle member, and when the two members are fully connected, the inner circumferential surface of the box member covers the outer circumferential surface of the bottle member.

In use, the two types of members are telescopingly mated and axially fixed. This fixation is performed by the coupling annular protrusion on the inner circumferential surface and the recess on the outer circumferential surface.

When the two types of members are combined in a telescopic manner, they are first pushed in until the truncated conical portions come into surface contact with each other, and this surface contact creates a seal between the members. The box member then expands and/or contacts the bin member once the pressurized fluid is properly placed between the members. Simultaneously, an axial force is applied to the members, causing them to come together. As a result, the bottle member having the protrusion and the box member having the recess are combined.

When this member is removed, pressurized fluid is again introduced between the members. -f: If rubbed, this member expands and/or contacts the bottle member. There, it comes into contact with the above member. Then, the protrusion of the member gradually disengages from the recess, and as a result, the two members are separated in the axial direction. However, in order for the pressurized fluid to work effectively, it is necessary to seal the two halves of the truncated conical portions. As has already been shown, if either of the two members becomes biased during the expansion and/or contact, the seal will be broken as this member will distort into an oval shape. This reduces the pressure of the fluid, making it impossible to remove the member.

Furthermore, especially when the pipe is used for transporting pressurized fluid, it is necessary to seal between the members of the joint to prevent leakage of the fluid. In addition, especially when the outside is a pressurized fluid, for example underwater, it is necessary to seal between the joints to prevent infiltration of the outside fluid.

A pipe fitting provided in accordance with the present invention includes a tubular bin member, the bin member having a generally frustoconical outer peripheral surface, and a main pipe fitting including a tubular box member, the box member having a generally frustoconical outer circumferential surface. The inner circumferential surface of this box member corresponds to the outer circumferential surface of the bottle member, and the inner circumferential surface of the box member corresponds to the outer circumferential surface of the bottle member when the two members are fully connected. The frustoconical shapes of both members have an annular protrusion and a groove, and these two types of parts overlap when the two members are fully engaged and fixed in the axial direction. However, in the main joint,
One of the two members has an annular protrusion, the protrusion extends around the inner peripheral surface of the one member, and extends under its own force to the free end of the one member, the protrusion has an annular shape. the first end surface being generally radial; the protrusion having an annular second end surface portion;
The end face is generally radially oriented, the second end faces the circumferential surface thereof, and the second, second end portion is disposed between the first end face and the circumferential surface of the second end. The other of the two members has a current first end face, which is generally in the radial direction, and a seventh end face when the two members are fully engaged. contacting a first end surface of the projection, and the other member having an annular, generally radially oriented second end surface, the first end surface of the projection when the members are fully engaged; It faces the end face and contacts it from the side.

The one member may be the bin member or the box member.

The second end surface of the one member has a generally truncated conical shape, and the λ-th end surface slopes in a direction opposite to the direction of the peripheral surface of the truncated cone. For example, the second end portion may be frustoconical, or the second end portion may include λ frustoconical portions, the λ frustoconical portions being truncated conical or rounded conical portions. 1 part and M, which is generally cylindrical, and 2 parts.

A second end surface portion of the other member may be provided with a rounded portion, and the rounded portion may contact the second end surface portion of the one member when the two members are engaged with each other. The rounded portion may form a portion that comes into contact with the one second end surface portion when the two members are engaged with each other. To do this,
The second end view of the other member has a generally truncated conical shape, and the truncated conical portion corresponds to the generally truncated conical portion of the second end face portion of the one member, and when the two members are fully engaged, The two corresponding parts can be brought into contact with each other.

In one embodiment, the second end portion of the one member has a frustoconical or rounded first portion and a cylindrical second portion between the seventh end portions; The second end surface portion of the other member has a rounded portion, and this rounded portion initially forms the first (1) of the λ-th end surface portion of the one member.
7 portion, and this rounded portion contacts the seventh end surface portion of the other member by means of a cylindrical portion, and the cylindrical portion of the other member contacts the seventh end portion of the other member when the two members are fully engaged. At times, the cylindrical portion of the one member is laterally contacted.

When the main pipe joint is used to connect pipe parts, if it is a place that receives an axial force, for example, a place where a pile is driven, the force that is received can be transmitted by press-fitting the seventh end surface, The joint between the first end faces is maintained by appropriately dimensioning the interengaging projections and grooves of the two members.

Advantageously, the first end surfaces of the two members are in a press-fitted state when the two members are fully engaged, thereby creating a seal between the two members, and this seal is formed using the two members. It works effectively both when removing and removing.

A seventh end surface portion and a second end surface portion are provided at the free end portion of the one member and the inner peripheral surface end portion of the other member, and the second end surface portion is formed when the bottle member and the box member are fully engaged. Although there is no lateral gap, the seventh end faces are spaced apart in the axial direction.

The seventh end surface portion and the λ-th end surface portion are not provided in a portion between the first end surface portion and the second end surface portion of the peripheral surface of the member,
The grooves are radially spaced apart, and the portions may be frustoconical or cylindrical, with the same or irregular conical shape relative to the rest of the surface of the member, or one cylindrical and the other frustoconical. Ir-A-'L-PLJlmif-ALA sealing device may be provided to seal between the above two members, and this sealing device has an annular elastic compressible member; is provided between the protrusion of the one member and the main body of the one member, and this disposed sealing device is engaged by the free end of the other member. A similar resilient annular compressible sealing member may be provided at the inner end of the other member and is engaged by the free end of the one member. As an alternative embodiment, a protrusion protruding in the radial direction is disposed adjacent to one end or both ends of the circumferential surface of the one member, and the protrusion is press-fitted to the circumferential surface of the other member. be able to.

In one embodiment, a radial protrusion is provided on the peripheral surface of the other member, the protrusion being adjacent to the free end of the other member; The first end portion and the second end portion thereof are engaged for sealing, and the protruding portion is adapted to deflect the second end portion of the other drawing material. , this deviation! The second end surface of the other member is arranged so as to be in contact with the second end surface of the one member. A radial projection similar to that described above may be provided on the peripheral surface of the one member adjacent to the free end of the one member.

Hereinafter, embodiments of the present invention will be grouped using figures.

As shown in FIGS. 1 to 3, according to the present invention, the pipe joint has a tubular pin member and a tubular box member 3,
This is for joining the ends of a pipe (not shown). The pin member and the box member engage in a telescopic manner. It has a trapezoidal outer circumferential surface and an inner circumferential surface j, A, and both surfaces S, t overlap each other when the pin member is fully engaged with the box member.

In order to fix the pin member to the front Rorobo/box member in the axial direction when the member is fully inserted and engaged as described above, an annular ring extending in the axial direction is provided on the periphery of the truncated conical surface of the box member. A plurality of grooves (or protrusions) are arranged at intervals. The grooves (or protrusions) each extend in a radial plane. The pin member has a circular protrusion (or groove) extending in the axial direction in correspondence with the sinker, and the protrusion corresponds to the groove (or protrusion). The groove portion and the protrusion portion are shown in the front ml and the broken line portion 7 of 4. Diagrammatically shown at f.

However, the details have been omitted. The above protrusion and groove are
For example, British Patent No. 1S737G, No. 203! ! 71 and No. 2/333j (although the protrusions and grooves described in detail in the above specifications may also be referred to).

As shown in the figure, the protrusions and grooves 7. ．． 1' does not extend over the entire length of the surrounding surfaces j, 7 (and the protrusions and grooves include the annular end surfaces /θ and I/, /2). As shown in FIG. extends between the surface of the top of the protrusion and the surface of the JE,Ci portion of the upper ml groove.If this is to be improved, the surface area, /2, is defined as the surface between the top of the protrusion and the groove 641. You can also extend it to the same cylinder size as the cylindrical shape.
If θ, ii are the same as the area between the protrusions and the bottom surface of the groove and other parts, then jL[7 may also be used.
stomach. Another change of mountain fw i 薯fp 'y (gmu If
f I/-1μ-+' i6i Q Tb top I)?
・Ta 6'j spear ■ri If 1.
,! Make the diameter of the protrusion and groove the same as IC7m W, and align the above 1 m to /2 with the top surface and +ju of the bottom as described above, or alternatively, align the above 1 m with the top surface and bottom +ju. It is also possible to make it fall between the two. 7. Instead of doing as above, do 1 self face 10. ///
may be made into a circular 14 shape, and the above-mentioned faces 1/2 may be made into a truncated cone shape. Here, in the case where either of the above 5 or /2 is a truncated cone, instead of making the cone angle of this enclosure the same as the part of 9 to /2 above other than this surface. Furthermore, even if the cone angle of the truncated conical surface is made thicker than the other surfaces, it will not support the point. Historically, since the above-mentioned surfaces 7.2 to 7.2 have the above-mentioned dimensions, when the above-mentioned members are fully inserted and engaged, the above-mentioned surfaces are slightly li + L fl or d in the radial direction. However, there is no contact due to press fitting. If the above surface extends 7'L in the radial direction,
As will be described later, the pair of surfaces is provided with an arrow C section in the radial direction, and the dimensions of this pair of surfaces are determined by Radial force 1iJ Ic Nord-4-
Yo'l tr Taisai ni -4-ru.

As described in the above-mentioned Disclosure Specification-π (511n), when attaching and detaching the above-mentioned section, pressurized fluid is applied to the heavy contact portion of the above-mentioned member, 2. The radial passage 2 of the box member
The pressurized fluid is applied to the upper part 4a and the protruding part of J-, A and the loading part Ir: in the axial direction. The passage 2 is in communication with the axial groove in the axial direction of the 2nd column 1', 1' and 2', or with the enclosure j of the pin IS phase and the surface 2 of the box A++ material.

``When removing the drawer described in Section 2, first use the pressurized fluid described above to remove the box part or (and) pin i, item 11,
The ascending protrusion must be widened sufficiently to disengage from the groove (not crooked) and thus be able to move in the Ro11 direction.In the first stage of this removal, the protrusion and groove must be When the upper 1c4 pressure rod is contracted and/or expanded but not yet completely dislodged, the upper 1c4 pressure rod is likely to leak.

The leakage area of this pressurized fluid 21j is reduced to such an extent that the pressure of the pressurized body cannot be removed. Further, even if any one of the upper members 61 is easily deformed, the above-mentioned portion 42 will not be displaced apart from expansion and/or contraction (im).

In order to prevent this problem, as shown in the figure, the end of the inner circumferential surface j of the upper pin member, that is, the root part, is made adjacent to the annular protrusion /3. This hook-like protrusion /3 projects axially in the direction of the free end of the bottle member and extends around the circumference of the bottle member.
The end of / overhangs the entire circumference of θ.

The upper 6th self protruding g1+ /J is the 7th end face part/ke which extends in the radial direction VC generally flatly, and the 7th end face part /ke which extends generally flatly in the radial direction, and the 7th end face part /J which extends generally on the same side in the radial direction.
As shown in FIGS. 3 to 3, the second end surface 15 has a substantially truncated conical shape, but is inclined on the opposite side of the conical surface of the inner peripheral surface. The free end of the upper axis member includes a first generally radially outwardly extending flat end.
An end face s/b and a second end face part /7 extending radially inwardly and generally radially outwardly are provided. Located at the annular protrusion/g.

When all the members of the above section are assembled in a 7-fold manner as shown in Fig. 3, the seventh end section /Job and the second end surface section 1s, /''1 come into contact.The above-mentioned pipe joint transmits the force in the axial direction. If it is necessary to do so, the first end part /J/6 is brought together by compressive stress, and this first end part /J/6 is connected to the protruding part of the surfaces j and t and the fourth part. Maintain contact by adjusting the dimensions appropriately.

Even worse, the second end face part/3. /7 is press-fitted and pulled out to form a face-to-face type knob, and when this pipe joint is used, the above-mentioned part S1+! It worked effectively in the early stages of 1 o'clock. The effect will be explained below.

1 to 7 show other shapes of the pin +XB iJ and the second end face portions /js and /7 of the box member. The shape of this part shown in Figure V is similar to that shown in Figures 1 to 3.
Corresponding to the end face part, this end face part /S has a truncated conical shape, and the apex angle of the conical part is about 300, but this is 7 examples, and this apex angle can be changed on request. It's a good idea to do that. The second end face portion 17 has a rounded bevel /7 (a), and this portion /?a comes into contact with the f second end portion 15 when the above-mentioned members are completely assembled. The curved portion /7a is axially separated from the cylindrical surface portion /7b and the radial end surface l?

In the embodiment shown in FIG. S, the second end face portion /! It/i has the same shape as the second end surface 6a ts in FIG.
The fd surface is connected to the truncated conical part/7cVc, and has a smaller conical angle than the truncated conical part/7c end surface part 15, for example, 0. In the embodiment shown in Fig. 1, the rounded part 17 has the same shape as the example h (a) in Fig. 1, but the second end face /j;
There are three truncated conical parts /, 5a, /jb. When the pipe joint is assembled, this one truncated cone part /ja contacts the tip of the round part /7aK, and the cone angle of this truncated cone part /3a is larger than the cone angle of the other truncated cone part g15b. big. For example, it is 300 for the truncated conical part 73g and the beam 4Z for the other truncated conical part/Sb. This shape of the end face portion 15 engages the members and performs three functions. The reason for this is that the protrusion /g receives less radial restraint at the free end 1c of the box member having the rounded portion /7, and therefore the bent end face 15 of the protrusion u'b/g. /
7 is a truncated cone with substantially the same cone angle, for example 300, and the end face /7 is connected to the radially oriented face /f via a rounded part.

The free end of the pin member and the inner end of the box 0 are also provided with protrusions/3 as shown in FIGS. 1 to 7.
', /za' and the first end surface portion and the λ-th end surface portion lq' to l
each protrusion and each end/3' to i
g' is a protrusion between the free end of the box member and the inner end of the pin hole/3. /Za and end face/Hiroto/7
corresponds to However, the free end of the pin member is provided with an end face part /4'' so as not to come into contact with the end face part /6' when the pipe fitting is fully engaged.End face part 15', / In exactly the same manner, 7' cooperates with the corresponding end face parts /js and /7 at the free end of the box member and the inner end of the pin member.

Since the end face parts /4' to 17 and /IA/ to /7' are arranged as described above, the end face parts /S, /") and the VtM surface portion B', /"l" come into contact with each other. The radial and axial forces on the upper 1C4a surface 1til will depend on the relative dimensions of the members and whether the end surfaces need to be in contact for sealing. When the pipe fittings are not fully connected, the end face portion/socket/6 will be connected, and this joint state can be visually confirmed from the outside of the joint. This can be used as an indicator of whether or not the contact member has been sufficiently engaged with the base member. Depending on the design of this member, pressurized fluid enters between surfaces j, A, which causes expansion of the box member and/or contraction of the pin member between lll1l, A. The above side! .

The expansion of the box member in the part where the end of B is located is the protrusion/
3. /3' is ill! and by this restriction of expansion, the end face portion /3. /'') and 7.5', /7' contact and form a seal effect which increases. The protrusion of the above-mentioned surface j, 4 does not extend to the end of j, 7, so the protrusion /3 ., /3' is the end of plane J-, A and 5 as mentioned above.
Even if IC expansion is limited, is it possible to prevent the expansion of the box part and/or contraction of the pin member to the extent that the upper protrusion and groove part completely come off? This is a preferable example. That's a good thing. Since the protruding part is radially supported, the protruding part cannot be removed from the groove, but the pin member and the box member can now move in the axial direction. At the time when the movement starts in the axial direction, the seal between the end face parts B, /"l and the end face parts 15', /7' is not broken due to the effect of the length and shape of the surfaces j, A, and this The more the protrusion reaches the position where the bottle part and box part are shielded from each other, the more the pin member and box part are separated in the yoke! direction.

When the pin 0 shrine and the box member begin to move relative to each other in the radial direction and the ... direction, the pin 0 shrine and the box member move toward the end face portion /3. /1 and end face portion 15'.

It is also advantageous that by combining with 77', it is possible to maintain a sufficiently circular and concentric state.

2 and 2 show improved examples of the embodiment shown in FIG. In this embodiment, the end face parts /7a, /7b have the same shape as the end face parts /7a, /7b in FIG. 2, and the rounded part /7a continues to the circular part /7bvC. The end surface portion 75 of this embodiment is similar to the first portion 15d of the actual example shown in FIG.
has. Since the diameter of the end face part/7b of the protruding part 7g of the box member is a little thicker than the diameter of the end face part/jd of the pin member, when the pin member and the box member are combined, the end face part/7b 7a first comes into contact with the end face part /ja, and when this end face part /7a accumulates and slides, it becomes the protruding part /ja.
The edge is bent at the point where the end face part /7b and the end face part /ja contact each other. This is advantageous in this embodiment, and by suppressing the radial movement of the protrusion 7g and deviating the protrusion/g in the radial direction, the protrusion/g is extremely can be closely controlled. This suppression 2 and deflection of the protruding portion is achieved by making the dimensions of the end surface portion /7b and end surface portion /jd relative, specifically, the dimensions of this end surface portion /'')b and Bd. When the pin member and the box member are fully engaged, the end face part /7b and the end face part /3
In order to sufficiently engage the pin member and the box member while maintaining a seal between the pin member and the box member, the distance between the pin member and the box member can be reduced at a point 1 to minimize the widthwise movement required for movement in the housing.

Jin-→! , which box member to inflate and/or
During the initial expansion and/or contraction of the pin member, pressurized fluid is introduced around the pin member to cause the pin member to contract.
By pressing 7b firmly against the end face /jd, the sol effect becomes greater. This end face/
Of course, the end face portion 7b is kept sufficiently circular by the surrounding portion 15d. The contact between the end face member /7b and the end face member /, 5d is maintained even when this member initially begins to increase VcL slightly in the axial direction, and this contact causes the top surface of the protrusion to fit into the groove. 1. Due to the axial movement between the two end face parts, the end face part /7a comes into contact with the end face part /5a, thereby sealing between the two end faces /3°/7. even maintains it.

As in the embodiments already described, Figures r and 7
In the illustrated embodiment, the protrusions /, 3', /g' are connected to the pins (JU'). , /4'
, /7' correspond, and the planes /S' and /7' become the planes 1s, /
``Cooperate in exactly the same way as the mind in l, the plane /h/ and the plane 76
′ can be made so that they do not touch.

In the embodiments described above, the protrusion of the pin member is integrally formed with the body of the pin member. In the improvement shown in Fig. 701, the protruding part /3 of the upper j pibin part is made into an annular member JO that extends from the part 11i, and this @autumn part part 0 is replaced with a suitable part of the inner end of the upper n pibin part. This annular member may be fitted into a recessed portion of a similar shape (20).Similarly, the protruding portion 73' of the above-mentioned baffle member may also be fitted with a separation blade. 70, the annular member 20 is engaged with the inner end of the peripheral surface A of this member. As shown in FIG. This corresponds to Hts, t7 in the example, but the above 10IA
It is a good idea to apply the improvements shown in Figure 15 to all the practical hb examples described above.

Ii/ when uncoupling the above pin member and box part
, the seal between S and 111I17? In order to improve
That is, in order to make it easier to seal the unsealed surfaces when the pin member and the box part are sufficiently sweaty, an annular clamp 2/ shown in FIG. 3 is removed from the pin member. It is also possible to engage the area of the protrusion part /3 so as to surround it, thereby preventing the upper part of the protrusion part /3 from deflecting inward in the radial direction. This clamp 2/ is above i
It is preferable to use it in any embodiment.

To seal the target between the pin member and the bottom part of the joint used under sales conditions where internal pressure and external pressure are applied, and to perform the first step 1-4 of uncoupling the two parts. A sealing device surface may be provided for the purpose of sealing the ZM &Ii around the shrine. However, this sticker is ψ:M +bJ part/! ;, /7 and end face /j', ! This seal is weakened when the seal is formed by contact with the ``)'', i.e. when there is a requirement to add another seal. For example, as shown in Figures r and d, this seal is weakened.
(A compressible annular member ψO having L strength is provided at the bottom of the recess 4'/, this recess tAl is provided at the tut between the pin-15 paulownia protrusion 13 and the main body, and this recess 66μ) is provided with a sub-7
Engage the free ends of the boxes as shown in the figure. The free end of the pin member and the box 0 chestnut are connected using a compressible material having similar adhesive and adhesive properties. The sealing members ty-o and 0' can be provided at any fL of the embodiments shown in FIGS. As shown in (, the protrusion/which end face 19 (also t/i/9') is rounded, this makes f = d seal HiroO (or HiroO
’) Improves sealing performance through contact with

Instead of doing this, as shown in Figure 1 and Figure 1, a radially inner protrusion 'A3 is provided on the surface of the box part shrine/protrusion part/g of the pin member. When the box member and the box member are sufficiently connected, V-δ'/, as shown in FIG. 2, this protrusion≠3 is brought into contact with IkJ/θ of the pin member.

The surface IOI''i is cylindrical, and the minimum diameter of the top of the protrusion ≠ 3 is made smaller than the diameter of the surface 10 in order to make the above i tangent sufficient. s.

Effect on engagement with /7 /'! However, this "concubine" is this end face part/3. /7 is brought into contact. It is preferable that the diameter of the surface /7b is smaller than the diameter of the surface /jd since the surface /3° is cylindrical due to the sealing part 3 shown in Figures 1 and 1-. However, the radial thickness of this member /7b and the top of the protrusion≠3 is greater than the radial distance between surface No. 0 and surface /Jd, so that the bottle member and the box The parts are fully connected and 2tl is fully connected.
/7b and the surface 15 are pressed together once they come into contact. A spherical protrusion 3' is provided in the radial direction on the surface of the free end of the pin member material in the same manner as described above, and the protrusion 1. :J/ is preferably press-fitted into the inner end of the box member.

The embodiment of FIG. 73 corresponds to the embodiment of FIG. 1/ and FIG. 72, but with a different internal structure d, in this embodiment a truncated conical surface /3a of FIG. 1/ and FIG. 72.

75′a is a rounded curved surface/,! re, /,! i
It was changed to e'. The advantage of rounding is the surface of the protrusion /3 or /3' /3e or 15e'
The axial range of the protrusion is /ja or 1i of 758'
It can be made smaller than one circumference in the ib direction, and as a result, the range of the protrusion 73 or /3' in the I concave direction and the annular protrusion /I! 1' or /6'', that is, the end face portion 15d, /7b, or /ja'
, axial dryness of the contact area between /7b',! This is the point where it becomes possible to reduce fJ. End face part /3e or Q/Se' is end face part 15d or /Jd and end face part /l or 1
7t', the end face part /7b or /7 of the box member on the radius of curvature lL of the curved surface of this end face part Se or /3 e'
The radius of curvature of the curved surface between b' and the end face part /6 or round' is larger than the radius of curvature of the curved surface. It is possible to reliably prevent interference between
In the final stage of coupling the hinge member and the box member, the tops of the protrusions are forcibly pressed against the surface between the adjacent grooves, and the grooves allow the protrusions to be coupled. At this point, the bottle member and the box member are forcibly deformed and inserted into the protrusion and the grooves t and g.The annular protrusion /g of the box member is not affected by the above method.Therefore, this box The radial deformation of the box member causes the annular protrusion /g to taper outwardly from the box member into a slightly truncated conical shape.The radial deformation of the box member acts as described above. This serves to connect the annular member /! to the recess between the protrusion /3 and the body of the bottle member.Therefore, the need to widen the drawing surface /!in, /3e is reduced.As shown in the figure, A radial seal 7 is formed and the radial dimensions of the annular projection l of the box member and the surface 10./3d of the bottle member are similar to those described in FIGS. However, it is convenient that the above end/
,te or/! ; The shape of e' is -1: Fig.
Applicable to Figures g and 7, in which case surface pattern a or 15a' is rounded surface /3ie or /! ; Change to e'.

face, // and face10. If there is no seal on /:l or where the surfaces are slightly separated when the bottle member and box member are fully connected, the radial direction of the portion adjacent to the protrusion/gap of the box member may be The thickness is reduced, for example, as indicated by the reference numeral in FIG. 7, thereby making the protrusion 7g more flexible when the bottle member and box member are attached and detached. Advantageously, this feature can be directly applied to the other embodiments described herein, and in both embodiments, the protrusion /g' of the free end of the bottle member It can be applied.

The above-mentioned bottle member and box member/3 can be provided so as to be integrated with the end of the pipe, or can be provided in a form that can be separated from the end of the pipe, or can be provided directly on the end of the pipe. It can also be fixed directly or indirectly.

In the case of direct fixation, the member may be welded to the tube end, for example. In the case of indirect fixation, for example, a pipe joint of the same type or a different type is used, and the above-mentioned bottle member and/or box member are connected to the tubular part of the pipe jointC.
Both are possible. For example, as shown in FIG.
is coupled to the Bo Nox member 3. This box member 3
is the UK patent No. 1 Tough 3 cited above≠! It is formed integrally with a pipe fitting as described in the specification of No. The pipe fitting described in this British patent specification does not allow for removal. The box member J is permanently connected to the bottle member Δ, and the box member J is integrally formed at the end of the tube unit 6. Alternatively, the pipe joint having the box member 2g and the bottle member J may be made non-removable; for example, the pin member and the box member/
It can also be made the same type as the joint with 3.

In all of the above embodiments, the inner circumferential end of the pin member and the end faces /U, /l of the free end of the box member are joined together when the two members are sufficiently joined, and the end face /IA' , /A' are axially spaced apart. If it is required to apply a compressive force in the axial direction when the above-mentioned two members are fully connected, all the above-mentioned embodiments may be
The inner circumferential surface end of the box member and the end surface portion, A', /4' of the free end of the pin member are in contact with each other, and the end lμ
, /A are preferably improved to be spaced apart in the axial direction.

The components of the above-mentioned pipe fittings can be made of high tensile strength steel, for example.

[Brief explanation of the drawing]

1 and 2 are partial axial cross-sectional views of a pin member and a box member according to an embodiment of the present invention, and FIG. 3 is an axial partial sectional view of a corresponding portion of the member shown in FIGS. Figures μ to 13 are partial cross-sectional views in the axial direction of the improved pin member and box member; It is a sectional line diagram of the direction. C...pin member, 3...box member! ... Outer circumferential surface of pin member, 6... Inner circumferential surface of box member, 7...
-Protrusion, r...Groove, 10...End face of protrusion, //. /n... end face of recess, 13. /3'...protrusion, /L
, /μ', /A. /A'...7th end surface portion, /3. /j! ;', /7
．． /7'...second end surface part, /ja...first part,
/! ;b,/! ;d...first part, /7a...rounded part, /7b...cylindrical part, /7c...truncated conical part, 7g...annular protrusion, /ri...・Radial end face part, aO, guO/,, sealing member, Gen, Hiro,
? '...Annular protrusion applicant's agent Kiyoshi Inomata 54 Figure 66 Figure 67 Figure 6 Figure 6 Figure 6 Figure 6 Figure IO Figure 72 Figure procedure 1 ■ Correct... (Method) October 1980 lr date Vr ff Director General Shiga Gakudon 1, Indication of matter f1 Patent Application No. 68363 of 1983 2, Name of the invention Pipe-coupling 3, Relationship with the amendment case Patent applicant Hunting, Oil Field, Sahishis, ( UK), Limited 4, Agent: September 5, 1982 (Delivery date: September 25, 1982) 6. Drawings subject to amendment. 7. Contents of amendment: Engraving of drawings (no change in content)

Claims (1)

[Scope of Claims] l) The pipe joint has a tubular pin member, the pin member has a generally frustoconical outer peripheral surface, and the pipe joint has a tubular box member, and the pipe joint has a tubular box member. The member has a generally frustoconical inner circumferential surface that corresponds to the frustoconical outer circumferential surface of the pin member, and the inner circumferential surface corresponds to the frustoconical outer circumferential surface of the pin member when the members are fully engaged. An annular protrusion and a groove are provided on the truncated conical surface overlapping the outer peripheral surface, and the protrusion and groove engage with each other when the member is fully engaged, thereby causing the member to move in the axial direction. In the pipe joint fixed to the pipe joint, the one member (l, 3) has an annular protrusion
13), which protrusion (13) extends around the inner end of the peripheral surface (i) of the protrusion and in the direction of the free end of said one member, and extends in the direction of the free end of said one member; ) has the current seventh end face part (/4'), and this first end face part (/4')
4) is generally in the radial direction, and this protrusion (/3)
has an annular second end surface portion (/S), and this second end surface portion (/S) has an annular second end surface portion (/S).
15) is generally in the radial direction, and this second end face part (/!;
) faces the peripheral surface and is between the peripheral surface and the first end surface, and the free end of the other member (3) has an annular first end surface (it, ). However, this seventh end face part (/6) is located approximately in the radial direction, and this first end face part (/A) comes into contact with the first end face part (/Hiro) of the above-mentioned protruding part when the above-mentioned members are fully engaged. and the other member (3)
) has an annular second end face part (/7), this second end face part 1 (17) faces in the radial direction, and this second end face part (17)
When the members (l, 3) are fully engaged, the protruding portion (
13) A pipe joint characterized in that it comes into contact with the second end face portion (15) of the pipe joint. , 2) The pipe joint according to claim 1, wherein the one member is the pin member (1). 3) The pipe joint according to claim 7, wherein the one member is the box member (3). g) The first end surface (/S) of the one member (1) is approximately in the shape of a truncated cone, and the first second end surface (/S) extends in the opposite direction to the truncated cone-shaped surface. A pipe joint according to any one of claims 1ff4 to 3. j] Second end surface portion (15) of one of the members (l or 3)
has a truncated conical seventh part (/ja) and a truncated conical second part (/3b), and this first part (/jb) is larger than the first part (/!; a) in the surrounding surface. reeds near,
The pipe joint according to claim 1, wherein the cone angle of the second portion is smaller than the cone angle of the truncated cone. t) Second end face portion (15) of one of the above members (l or 3)
is a truncated conical seventh portion (15a) and a generally cylindrical second portion (15a).
Claims 7 to 7, characterized in that the second part (lSd) is closer to the surrounding surface than the frustoconical first part. Pipe fittings described in any of the sections. 7) Second end surface portion (is) of one of the above members (/or 3)
has a radially outer rounded seventh portion (15e), which first portion (/!se) is connected to a generally cylindrical second portion (/, 5d); 6. A pipe fitting according to any one of claims 1 to 5, characterized in that lSd) is located closer to the surrounding surface than to the rounded portion. ) Second end face part (/7) of the other member (3 or l) above
is the rounded part (/7a), and this part (/7
A) is characterized in that when the bottle cap and the box member are engaged, the Hx end face portion (/S) comes into contact with any one of claims 1 to 7. Pipe fittings listed. 9) Second end face portion (/7) of the other member (3 or /)
has a rounded part (/711), and this part (/
7a) is characterized in that it comes into contact with the second end surface portion (15) of the one member (1) when the pin member and the box member are fully engaged. 'Br2 mounted pipe fitting. The second end part (/7) of the other member (3 or /) of l
has a rounded part (/7a), and this part (/7
A) is characterized in that when the bottle member and the box retainer are fully engaged, the second part (/jb) of the 6Tj end 17ili part (/j) of one of the draws is contacted. Pipe fittings according to scope 5. //) The second end face part of the other mating member (3 or 3) (/7)
has a cylindrical portion (17b), and this cylindrical portion (
/7h) is bonded to the rounded part (/7a),
Any one of claims 7 to 10, characterized in that the rounded surface of this rounded part (/7a) faces the first end part (iA). Pipe fittings described in the above section. No. 2) The first end surface portion (/) of the other member (3 or l) above
7) sounds the truncated conical part (/7c), and this part (/
7c) is connected to the rounded part (/7m), and this rounded part (/7a) is connected to the first end face part (iA
), Claim f is characterized in that:
The second end face portion (/7) of the above other member (3 or
) has a generally truncated cone shape, and the cone angle of this second end face part (/7) is the same as the first second end face part (/7) of the one member (l or 3).
The pipe joint according to claim 2, characterized in that the cone angle of S) is the same as the cone angle of S).ノ≠) The second end face portion (/7) of the other member (3 or l)
) has a cylindrical part (/7b), and this part (/7b
) is coupled to the rounded portion (/7a) following the first end surface portion (iA), and the cylindrical portion (/7b) of the λ-th end surface portion of the other member (3 or)) The force of claim r is characterized in that the side contacts the cylindrical portion (15d) of the first end face of the one member () or 3) when the members are fully engaged. Pipe fittings listed. /j) The seventh end face part (11i, iA) of the above part (), 3)
) is press-fitted when the members are fully engaged, the pipe joint according to any one of claims 7 to 1. /6) The λ-th end face portion (/, 5./7) of the above member (/, 3)
) is press-fitted when the members are fully engaged, the pipe joint according to any one of claims 7 to 15. /7) The second end face portion (/7) of the other member (3 or /)
) is provided on the plate-shaped portion of the free end of the other member,
A pipe joint according to any one of claims 1 to 1A, characterized in that the second end face portion (17) can be bent in the radial direction when the member is attached or detached. zff) The annular portion (1g) of the other member (3 or l)
18. The pipe joint according to claim 17, wherein the thickness of the other member is reduced within the range of .), thereby bending the annular portion. /? ) Said second end face part and second end face part (/IJ, 15
．． lA. /7), the surrounding surface of the above division system (j, 6
) has no protrusions or grooves, and the surrounding surface (-1-
, A) are radially spaced apart when the members are fully engaged, the pipe joint according to any one of claims 1 to 1e. J) The pipe joint according to any one of claims 7 to 79, characterized in that a sealing device for sealing between the members is provided. rl) The sealing device has an elastic and compressible annular member (G0), and this annular member (G0) is connected to the protrusion (/3) of the one member (/or 3) and the one of the members (/3). This annular member (lIO
) can be engaged by the free end of the other member when the members are fully engaged. n) The sealing device has an annular radially projecting protrusion (tI-, t), which protrusion (tI-, t) is connected to the seventh end face and the second end face of the peripheral surface of the one member. 21. The pipe joint according to claim 20, wherein the protrusion (lA, ?) is press-fitted into a peripheral surface of the other member. 3) The current protrusion (≠, 3) that protrudes in the radial direction is the second part of the surface (6) surrounding the other member (3 or)).
The current protrusion (phantom) is provided within the range of the end face 't$ (/7), and this current protrusion (phantom) connects the second end face part (/7) of the other member (3 or l) to the one member (l or 3). 10. The pipe joint according to claim 9, wherein the pipe joint is pressed until it contacts the second end surface portion (,'S) of the pipe joint. - one of the members is the bin 158 (/), and the outer edge in the radial direction of the first end portion (/, lA) of the member (l or 3) is visible from outside the main pipe joint; A pipe joint according to any one of claims 1 to 2, characterized in that: J) A protrusion (/J) corresponding to the protrusion (/3) of the one member (/or 3) is provided at the inner end of the other member (3 or l), and this protrusion (13 ') has a λ-th end face part (i!;') facing in the radial direction, and this second end face part (15') has a second end face part (i!;') facing in the radial direction. (lge), and this λ-th end face portion (
/7') corresponds to the second aperture part ()7) of the free end of the other member (3 or l), and
) and the free end of the one member have a thread/end face part (, tA/, , , , + ), and this first end face part (lμ′, lA′) It corresponds to the second end surface portion (/lA) provided at the protrusion of the one member and the free end of the other member, but the seventh end surface portion (lit', iA)
A') is a pipe joint according to any one of claims 1 to 3, characterized in that the pin member and box member (l, 3) do not come into contact when fully engaged. -zg) The pipe joint according to claim 5, characterized in that a sealing device (DAO', HIRO3') for sealing between the upper IB member (/, J) is provided. , 27) The sealing device has a resilient and compressible annular member (qo'), which annular member (qo') is connected to the protrusion (/3) of the other drawing material (3 or/). ') and fine quality?砒''# term (square is large concave angle L l/ %;
15. A pipe fitting according to claim 14, characterized in that the pipe fittings are engaged by the free ends of the pipes. d) The sealing device has a radial annular projection (Q') which extends around the free end of the one member and the adjacent surface of the other member. The pipe joint according to claim 1, wherein the current protrusion (φ3') is press-fitted into a peripheral surface of the other member.