CN100588865C - Joints - Google Patents

Abstract

The invention relates to a joint piece having an union ring with internal thread that extends to an annular groove positioned inside the union ring with a ring key inserted into the region of anotheropening side of the union ring.

Description

Adapter piece

Technical field

The present invention relates to a kind of adapter piece, be used for carrying out hydraulic pressure and connect, and nominal width surpasses the connection of 32mm when being used in particular in working pressure up to 350bar and flow velocity at 1000-1700l/min at underground mining.

Background technique

In underground mining, itself formed known by checking according to the standardized U-shaped snap close link (staple-lock coupling) of Deutsche industry norm (DIN) DIN 20043.But, the problem that the known U-shaped snap close link that is used for hydraulic pipe line exists is, they no longer can adapt to required working pressure along with the increase of nominal width, this be because, described joint realizes by staple, and this staple only is fastened on two tangential part places along circumference with two parts of U-shaped snap close link.

Summary of the invention

The purpose of this invention is to provide a kind of hydraulic pressure jointing, it along with the increase of nominal width also can be used, and need not existing standardization U-shaped snap close link is transformed under up to the working pressure of 350bar.

This purpose is achieved by the characteristic of claim 1, particularly be achieved by a kind of adapter piece, this adapter piece has tapped pipe ring (union ring), described internal thread is from the circular groove of opening side extension until being arranged on described pipe ring inside of described pipe ring, be inserted with ring key in the inside of described pipe ring, it is in the zone of another opening side of described pipe ring.Such adapter piece can be placed on the U-shaped snap close link according to Deutsche industry norm (DIN) DIN 20043, makes thus in the groove of described ring key wedging U-shaped snap close link, makes described adapter piece can not be connected to U-shaped snap close link with getting loose.In this connection, owing to use ring key, described adapter piece is wedged in U-shaped snap close link securely along whole circumference, thus the fastening connection when this guarantees that big and working pressure is higher at nominal width.Simultaneously, other coupling piece part can be screwed in the internal thread of connection pipe ring, and thereby by connection pipe ring firm grip.

In specification, accompanying drawing and dependent claims, the preferred embodiments of the present invention have been described.

According to first preferred embodiment, described ring key can have some radial slots, thereby forms some independently spring elements, in case adapter piece is pushed on the U-shaped snap close link, these spring elements can be inserted in the groove of U-shaped snap close link thereupon.In this connection, described ring key preferably has cylindrical portions may and taper part, and this is because when adapter piece was pushed on the U-shaped snap close link fully, independently spring element just bounce back in the circular groove of nail element especially reliably.

In addition, described ring key preferably has at the contact step of described pipe ring partly locates the contact step that contacts with being used at coupling piece, this be because, in this case, described ring key be wedged in especially reliably described pipe ring and coupling piece partly between.

According to further preferred embodiment, can be provided with and be with externally threaded middleware, this outside thread is screwed in the internal thread of described pipe ring, and allows to be threaded onto other connection pipe ring.Adopt this mode, two U-shaped snap close links that for example can connect each other according to DIN 20043 need not it is transformed.

Preferably can neck ring be set at the outside thread place of described middleware, so that two described outside threads are separated each other, thereby realize preventing rotating fastening.In this connection, other lock device also can be set in the zone of neck ring, like this, when being screwed onto on the middleware fully from both sides, the connection pipe ring just prevents that middleware from rotating.For this purpose, preferably in the connection pipe ring, recess is set, described lock device can be engaged enter wherein.Can also and join the pipe ring place at the neck ring place dentation structure and so on is set.

Described middleware preferably all has a ring-shaped step at the place, both sides, respective front according to the U-shaped snap close link of DIN 20043 can be inserted wherein, this is because the O shape ring that is arranged on two U-shaped snap close link places can seal in the zone of these two ring-shaped steps.

Description of drawings

Hereinafter the present invention will be only be described by the reference preferred embodiment and with reference to the example of accompanying drawing, wherein:

Fig. 1 is the cross section that hydraulic pressure connects, and the adapter piece right-hand among the figure assembles as yet;

Fig. 2 is that the hydraulic pressure among Fig. 1 connects, and right-hand adapter piece has been pushed on the U-shaped snap close link among the figure;

Fig. 3 is the U-shaped snap close link among Fig. 2, and right-hand adapter piece is wedged in U-shaped snap close link and is screwed to middleware among the figure; With

Fig. 4 is the plan view of the U-shaped snap close link among Fig. 2.

Embodiment

Fig. 1 shown and has been used for carrying out the U-shaped snap close link that hydraulic pressure connects at underground mining, and it comprises according to two U-shaped snap close links 10 of DIN 20043 and 12, according to two adapter pieces 14 of the present invention and 16 and middleware 18.

U-shaped snap close link 10 and 12 shown in the figure is normally known, and has sleeve portion 22, and sleeve portion 22 is provided with circular groove 20, and places groove hermetically at the front end place of this sleeve portion 22 O shape ring 24.

Adapter piece 16 comprises: connection pipe ring 30, it is formed into nut alternatively and has internal thread 32, internal thread 32 from the setting of connection pipe ring 30 in the drawings the opening side of left extend until the circular groove that is arranged on connection pipe ring 30 inboards.Ring key 36 inserts the inside that joins pipe ring 30 from another right-hand in the drawings opening side of the setting of connection pipe ring 30.

As shown in Figure 1, ring key 36 has the radial slot 38 that mutual space separates, and then forms independently ligule spring element 40 between otch 38.Ring key 36 also has cylindrical portions may 42 (it is right-hand to be arranged in figure) and is adjacent and is arranged in the tapered annular part 44 of figure left.

Ring key 36 has: at the contact step 46 (referring to Fig. 2) of connection pipe ring 30; With contact step 48 (referring to Fig. 1), be used for contacting in the dependent part office in its tapered annular part 44 zones of coupling piece 12, that is, independently contact at spring element 40 places at each.Connection pipe ring 30 also has ring-shaped step 50 (referring to Fig. 2), and it in abutting connection with circular groove 34, and is used to contact ring key 36 (referring to Fig. 3) towards the opening side of connection pipe ring.

Middleware 18 shown in the figure is made for tubular element, and has the corresponding outside thread 60 and 62 that symmetry is in both sides, and these two outside threads are separated each other by annular collar (collar) 64.Middleware 18 portion both sides places within it has corresponding annular step 66 and 68, and ring- shaped step 66 and 68 interior circumference adapt to the outer perimeter of the sleeve portion 22 of U-shaped snap close link 10 and 12.

In addition, be provided with the lock element that form is a screw 70 at neck ring 64 places of middleware 18, it is screwed into neck ring 64 and has two parallel flats 72 and 74 (referring to Fig. 4).In case U-shaped snap close link is twisted fully and lumped together, two adapter pieces 14 contact this two flats 72 and 74 with 16 end face, make middleware 18 can not carry out any moving axially.

For two coupling pieces with U-shaped snap close link 10 and 12 partly are engaged with each other, join pipe ring 30 accordingly and at first shifted onto on two U-shaped snap close links 10 and 12 (referring to Fig. 1 and Fig. 2).When connection pipe ring 30 was pushed on U-shaped snap close link 12 or 10, the spring element 40 of taper part 44 was along axial anterior slip of U-shaped snap close link 10 and 12, and radially outward is opened at this moment, thereby defines circular groove 20.This situation as shown in Figure 2.Can be cognitive be that circular groove 34 is used to accept independently spring element 40 in this case.

If then joining pipe ring 30 is pushed on the U-shaped snap close link 12 fully, then independently spring element 40 radially moves inward owing to its bias force, and in the circular groove 20 of wedging U-shaped snap close link 12, the contact step 48 contact U-shaped snap close links 12 of ring key 36, and the contact step 46 (referring to Fig. 3) of the ring-shaped step 50 contact ring keies 36 of connection pipe ring 30.

Two connection pipe rings 30 are after having finished corresponding preassembly, can be screwed onto on the middleware 18, two U-shaped snap close links 10 and concordant ring- shaped step 66 and 68 of contacting of 12 forefront make to be arranged on and press the O shape ring 24 at lock coupling piece place to seal near middleware.

When two connection pipe rings 30 all are screwed onto on the middleware fully, the flat 72 and 74 of the end face contact screw 70 of these two connection pipe rings, thus prevent the accidental release that is threaded.

Claims (10)

1, a kind of adapter piece, being used for carrying out hydraulic pressure at underground mining connects, comprise the have internal thread connection pipe ring (30) of (32), described internal thread (32) is from the circular groove of opening side extension until the inside that is arranged on described pipe ring (30) of described pipe ring (30), wherein, in the inside of described pipe ring, be inserted with ring key (36), it is in the zone of another opening side of described pipe ring (30), it is characterized in that, described adapter piece is pushed to the coupling piece part (10 according to the U-shaped snap close link of DIN 20043,12) on, the annular space (50) of described pipe ring (30) be arranged on wedging between the circular groove (20) that coupling piece part (10,12) locates the independently spring element (40) of described ring key (36) arranged.

2, adapter piece according to claim 1 is characterized in that, described ring key (36) has radial slot (38), thereby forms described independently spring element (40).

3, adapter piece according to claim 1 and 2 is characterized in that, described ring key (36) has cylindrical portions may (42) and taper part (44).

4, adapter piece according to claim 1, it is characterized in that, described ring key (36) has: at the contact step (46) of described pipe ring (30) be used for the contact step (48) locating to contact in the coupling piece part (10,12) of hydraulic pressure U-shaped snap close link.

5, adapter piece according to claim 1 is characterized in that, described pipe ring (30) has in abutting connection with the ring-shaped step (50) of described circular groove (37), is used to contact described ring key.

6, adapter piece according to claim 1 (10) is characterized in that, a middleware (18) with outside thread (60,62) is screwed into described internal thread, and described outside thread allows to be threaded onto other connection pipe ring (14).

7, adapter piece according to claim 6 is characterized in that, described middleware (18) is provided with neck ring (64) at the outer perimeter place, and it separates each other two described outside threads (60,62).

According to claim 6 or 7 described adapter pieces, it is characterized in that 8, described middleware (18) has and prevents the fastening piece (64,70) that rotates.

According to claim 6 or 7 described adapter pieces, it is characterized in that 9, described middleware (18) has corresponding annular step (66,68) at the place, both sides.

10, adapter piece according to claim 8 is characterized in that, described middleware (18) has corresponding annular step (66,68) at the place, both sides.

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