KR100298152B1 - Ring joint - Google Patents

Abstract

PURPOSE: A ring joint is provided to improve product reliability and to reinforce dust tightness, impact resistance, and binding force between pipes by improving the structure of a pressing ring. CONSTITUTION: A ring joint(40) to connect a first pipe(42) to a second pipe(44) is composed of a bolt(46), having projection for fixing, sliding on the peripheral surface of the first pipe, a nut(48) sliding on the peripheral surface of the second pipe being opposite to the first pipe, a washer(50) installed between the peripheral surface of the second pipe and the inside of the nut member, a pressing ring(52), installed to the seam of the first and second pipe, with separated in the bolt, a member for press fixing, composed of plural members installed among the bolt, the nut, and the washer to be fixed to the peripheral of the first and second pipe, pressing the pressing ring and sealed by contacting on wide part and having multiple sealing structure.

Description

Ring Joint

The present invention relates to a ring joint for connecting two pipes, and more particularly, piping for high-pressure fluids and harmful gases (air) as well as piping of objects with high vibration, such as piping in industrial facilities or piping in railway vehicles. Easy to use by one-touch type, and relates to a ring joint with an improved structure to ensure the stability of the airtight effect is maximized.

Generally, in industrial facilities, there are various types of pipes such as welded, screwed, pressed, expanded, and ring jointed. These methods depend on how the shape of the joints of the two pipes are constructed. At present, ring joints (fittings) have been developed due to problems such as inhalation of harmful substances into the human body by welding, safety accidents, and a large amount of space for transportation and construction. The method is widely used.

1 is a cross-sectional view schematically showing an example of a conventional union ring joint.

As shown, the union ring joint 20 is for connecting the main pipe 24 and the connecting pipe 32, the body 22 formed with a hexagonal bolt on the outer peripheral surface, the hollow formed in the body 22 And a pair of tightening screws (bushings) 26 and 34, a pair of tightening rings 28 and 36, and a pair of silicon packings 30 and 38, which are symmetrically coupled to both ends thereof.

As shown in FIG. 2, the ring joint having the above configuration turns the first tightening screw 26, the first tightening ring 28, and the first silicon packing 30 to one end of the main pipe 24. After inserting, one end of the main pipe 24 is inserted into one side of the body 22. In the connecting pipe 32, the second tightening screw 34, the second tightening ring 36, and the second silicon packing 38 are inserted in this order, and then the other end of the connecting pipe 32 is placed on the other side of the body 22. Insert it. In this state, when the first and second tightening screws 26 and 34 are tightened around the hexagonal bolt 22a of the body 22, the tightening rings 26 and 34 corresponding to the tightening screws 26 and 34 are respectively. ) Is pressed, and tightening the tightening screws (26, 34) in the desired state is completed the coupling of the ring joint (20).

However, in the conventional ring joint, the pipes 24 and 32 to which the first and second tightening rings 28 and 36 correspond, when the first and second tightening screws 26 and 34 are tightened to some extent about the body 22. The pipes 24 and 32 are rotated together with the tightening screws 26 and 34 because of the compression. Therefore, in the elbow, T, it is a hassle to compensate for the rotation of such a pipe.

Meanwhile, the fastening rings 28 and 36 are formed with cutouts 28a and 36a to prevent separation of the pipe, and the silicone packings 30 and 38 serve to maintain airtightness. Therefore, when a small vibration or shock is applied to the ring joint and a torsion phenomenon occurs in the pipe, it is fatal. This phenomenon has undesirable consequences for fluid or gas piping containing chemical components.

In addition, although not shown, the conventional ring joints include a ring or a ring by the coupling force of both the body and the tightening screw in a state in which the coupling is completed, but a separate fixing means is not provided so that any looseness is caused by vibration or impact. However, there is a risk that the coupling of the two pipes will be collapsed by the fluid flowing inside the pipe.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and by improving the structure of a crimping ring, a ring joint capable of sealing a wider area between two pipes to be connected in a wider range can be improved product reliability. have.

Another object of the present invention is to provide a ring joint that can be provided with a crimp fixing means to enable multiple sealing of the compression ring to significantly improve impact resistance, shock resistance, and binding force between pipes.

Another object of the present invention is to implement a one-touch coupling structure between members to shorten the time required for fastening, and to provide a ring joint to prevent the phenomenon that the pipes are rotated during the fastening is provided with a rotation preventing means. have.

1 is a partial cutaway perspective view schematically showing an example of a conventional ring joint.

Sectional drawing for demonstrating the assembly process of the ring joint of FIG.

Figure 3 is an exploded perspective view schematically showing a ring joint according to an embodiment of the present invention.

4 is a cross-sectional view of FIG. 4.

5 is a view showing a state in which the pipe is completed by fastening the bolt member and the nut member in the ring joint of FIG.

<Description of the symbols for the main parts of the drawings>

40 ... Ring joint 42,44 ... Pipe 46 ... Bolt member

48.Nut member 50 ... Washer member 52 ... Compression ring member

54,56 ... Sleeve member 58,60 ... Wedge member 62,64 ... Packing member

66,68 ... Adhesive

According to an aspect of the present invention, there is provided a ring joint for connecting a first pipe and a second pipe, comprising: a bolt member coupled to an outer circumferential surface of the first pipe and having a locking jaw; A nut member installed to slide on an outer circumferential surface of the second pipe disposed to face the first pipe and screwed to the bolt member; A washer member interposed between an outer circumferential surface of the second pipe and an inner circumferential surface of the nut member, the washer member being slid with respect to the second pipe when the nut member is rotated and having a close contact with an inner side thereof; It is installed on the outer circumferential surface of the joint portion of the first and second pipes so that the bolt member and the nut member are spaced apart inside the bolt member so as to be in close contact while indenting the circumference of both ends of the proximal side of the first and second pipes. Compression ring member is installed as; When the bolt member and the nut member are coupled to each other, the pressing ring member is pressed against the first and second pipes while being pressed close to the center of the pressing ring member by the locking jaw and the close fitting jaw, and by wide surface contact. A plurality of members formed between the bolt member, the nut member, and the washer member to be sealed and to recess the periphery of the first and second pipes to form a multi-sealed structure and to be fixed to the outer circumferential surface of the first and second pipes A fixing means;

According to another feature of the invention, the pressing fixing means includes: a stopper protruding radially outward of the pressing ring member; A pair of sleeve members installed on the inner circumferential surface of the bolt member and provided with a deformable portion capable of being deformed while being in close contact with both ends of the pressing ring member, and having a catching portion caught by the stopper; When the bolt member and the nut member are screwed together, the wedge portion, which slides into the first and second pipes by the locking jaw and the close contact jaw and can recess its outer circumferential surface, is itself the center of the pipe by the pressing force. Cut portions are formed to be bent in a direction, respectively, a pair of wedge members interposed between the sleeve member and the first and second pipes; And a pair of packing members installed to contact the inner circumferential surface of the sleeve member, the outer circumferential surfaces of the first and second pipes, and one end of the wedge member, respectively, and closely contact both ends of the pressing ring member.

According to a preferred advanced feature of the present invention, the adhesive member to adhere to the inner circumferential surface of the packing member in contact with the first and second pipes while being ruptured by the close coupling of the bolt member and the nut member; It is further provided.

Here, the adhesive member is preferably formed of an epoxy resin adhesive and a curing agent integrally in the form of a ring.

Hereinafter, a ring joint according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is an exploded perspective view schematically showing a ring joint according to an embodiment of the present invention, Figure 4 is a cross-sectional view of the combination of FIG.

3 and 4, the union ring joint 40 for connecting two pipes, that is, the first pipe 42 and the second pipe 44, has a bolt member 46 having a locking jaw 46a formed therein. And a nut member 48 screwed to the bolt member 46, a washer member 50 interposed between the outer circumferential surface of the second pipe 44 and the inner circumferential surface of the nut member 48, and the two pipes 42. And a pressing ring member 52 for pressing the joint portion of the joint 44, and a pressing fixing means for pressing / fixing the pressing ring member 52.

The bolt member 46 has a hollow portion through which the first pipe 42 can be inserted, and the outer peripheral surface of the first pipe 42 is coupled to the nut member 48 when the pipe 42 is inserted. Thus sliding. In addition, the bolt member 46 is fastened with a tool such as a monkey, spanner, and pipe wrench during piping, and a bolt tightening portion 46b having a hexagonal cross section is formed on the outer circumferential surface thereof, and extended to the bolt tightening portion 46b. As a result, the male screw portion 46c is formed.

The nut member 48 is formed with a female screw portion 48a which is screwed to the male screw portion 46c of the bolt member 46, and a nut tightening portion 48b having a hexagonal cross section at its outer circumference for fastening as described above. Is formed. On the other hand, one side of the inner peripheral surface of the nut member 48, the female screw portion 48a is terminated is provided with a seating portion 48c on which the washer member 50 can be seated.

The washer member 50 is installed on the seating portion 48c and slides with respect to the second pipe 44 by the nut member 48. That is, when the nut member 48 is rotated to closely couple the nut member 48 to the bolt member 46, the washer member 50 is not rotated and is advanced while sliding along the outer circumferential surface of the second pipe 44. . The washer member 50 has a function of preventing the phenomenon occurring in the conventional ring joint, that is, the pipe is to rotate with the nut. The washer member 50 has a half-rotation function with respect to the nut member 48 as described above. And, in order to give a close contact force to the bolt member 46 side, a close contact 50a is formed in the inner peripheral surface.

The pressing ring member 52 has a triangular cross section and a stopper 52a having a predetermined shape is formed on the outer circumferential surface of the central portion to form one component of the pressing fixing means. In addition, the pressing ring member 52 is positioned inside the bolt member 42 so that both ends of the first and second pipes 42 and 44 may be inserted to contact the joint portions thereof. The pressing ring member 52 has a function of tightly sealing the seam by being pressed by a close fixing means when the bolt member 46 and the nut member 48 are in close contact. On the other hand, the pressing ring member 52 is preferably used the same material as the material of the pipe to be inserted. Because the pressing ring member 52 is in close contact with the two pipes (42, 44) directly to prevent the change in physical properties that come from the change of material. Therefore, the bolt member 46 and the nut member 48 are made of inexpensive steel, and it is convenient to use only the pressing ring member with different materials depending on the type of pipe to be used.

When the bolt fixing member 46 and the nut member 48 are tightly coupled to each other, the pressing fixing means may be pressed toward the pressing ring member 52 by the catching jaw 46a and the contacting jaw 50a, respectively. The pressing ring member 52 is pressed against the 42 and 44 and at the same time, some components are fixed to the first and second pipes 42 and 44. To this end, the pressing fixing means is installed over the inner circumferential surface of each of the bolt member 46, the nut member 48, and the washer member 50. The pressing fixing means includes the above-described stopper 52a, a pair of sleeve members 54 and 56, a pair of wedge members 58 and 60, a pair of packing members 62 and 64, and an adhesive member 66, 88).

The two sleeve members 54 and 56 are installed to be in contact with the inner circumferential surface of the bolt member 46, respectively, and are in close contact with both ends of the pressing ring member 52 and the two pipes 42 and 44 in contact with each other. The protrusions 55 and 57 are formed to protrude so that they can be deformed by themselves. Here, the tip of each deformable portion (55, 57) is pressed at both ends of the pressing ring member 52 in the final stage of the close contact so that the pressing ring member 52 the surface of the two pipes (46, 48) in FIG. As shown, it is preferably designed to be slightly recessed. In addition, each sleeve member 54, 56 has a locking portion (54a, 56a) that can be caught by the stopper (52a) by the adhesion.

The two wedge members 58 and 60 are interposed between the sleeve members 54 and 56 and the corresponding pipes 42 and 44 so that the two wedge members 58 and 60 are connected by the locking jaw 46a and the close contact 50a. It is installed to slide about each. In addition, the wedge members 58 and 60 may have wedge portions that may recess the surfaces of the first and second pipes 42 and 44 at the time when the coupling between the bolt member 46 and the nut member 48 is completed. 59,61). The wedges 59 and 61 have a function of preventing the two pipes 42 and 44 from exiting the ring joint 40 by the recessed portion in the ring joint 40 where the coupling is completed. One portion of the wedge members (58, 60) is formed with a predetermined cut portion (58a, 60a) to be retracted in the longitudinal direction from the initial shape when the close contact with the pressing ring member 52 by the adhesion force. A plurality of pressing gaps 58b and 60b are formed in the longitudinal direction from the cutouts 58a and 60a so that the wedge members 58 and 60 are pressed by the sleeve members 54 and 56 to the pressing ring members 52. When the contact between the compression gap (58b, 60b) is reduced to the center of the pipe (42, 44) is reduced.

The packing members 62 and 64 are brought into close contact with the pressing ring member 52 by the corresponding wedge members 58 and 60 so as to closely contact both ends of the pressing ring member 52, and the sleeve members 54 and 56. It is installed to contact the inner circumferential surface of the first and second pipes (42, 44) and one end of the wedge member (58, 60), respectively. Preferably, the material of the packing members 62 and 64 is made of rubber, and a predetermined portion of the sleeve members 54 and 56 deformed by being pushed between the deformable portions 55 and 57 of the sleeve members 54 and 56 and Sealing both ends of the pressing ring member 52 has a function of sealing the ring joint 40 secondary.

The adhesive members 66 and 68 are intended to adhere to each other while being ruptured by the adhesive force when the bolt member and the nut member are closely coupled, and the epoxy resin adhesive and the hardener are integrally formed in a ring shape. That is, the adhesive members 66 and 68 are excellent in chemical resistance and water resistance compared to other synthetic resin adhesives, and are non-solvent type and do not include volatile by-products. Use a sex adhesive. In addition, the adhesive members 66 and 68 serve as the third sealing means in the ring joint after the pressing ring members 52 and the packing members 62 and 64.

The operation of the ring joint according to an embodiment of the present invention having the above configuration will be described with reference to FIGS. 4 and 5.

In the assembled ring joint 40 shown in FIG. 4, the first pipe 42 is inserted into the bolt member 46 and the second pipe 44 is inserted into the nut member 48, respectively. Both ends of the 44 are positioned at the center of the pressing ring member 52. Subsequently, when the nut tightening portion 48b of the bolt member 46 is tightened and fixed with a tool and the nut tightening portion 48b is rotated in the direction of arrow "A" using another tool, the nut member 48 and the bolt The members 46 are symmetrically advanced in the directions of arrows "B" and "C", respectively, about the pressing ring member 52. Then, the engaging jaw 46a of the bolt member 46 and the contacting jaw 50b of the washer member 50 correspond to the corresponding wedge members 58 and 60, the sleeve members 54 and 56 and the packing members 62 and 64. ) May be brought into contact simultaneously and / or sequentially. In this process, the deformed portions 55 and 57 of the sleeve members 54 and 56 and the packing members 62 and 64 compress both ends of the pressing ring member 52, and the tip of the pressing ring member 52 has two ends. The pipes 42 and 44 are tightly sealed while slightly recessed. Here, the engaging portions 54a and 56a of the sleeve members 54 and 56 are completely caught by the stopper 52a of the pressing ring member 52, and the deformation of the deformable portions 55 and 56 is completed. On the other hand, the wedge portion (59, 61) of the wedge member (58, 60) is the gap between the crimping gap (58a, 60a) formed in the longitudinal direction at the time when the coupling of the bolt member 46 and the nut member 48 is completed This shrinkage is compressed and curved to the center side of the pipes 42 and 44 while recessing the surfaces of the two pipes 42 and 44, thereby forming the grooves 42a and 44a. This groove serves to secure the two pipes 42 and 44 with respect to the ring joint 40. Also, in this process, the adhesive members 66 and 66 interposed between the packing members 62 and 64 and the first and second pipes 42 and 44 are ruptured by their adhesion and are spread around. When the bonding is completed, it is fixed firmly.

The above embodiments according to the present invention have described a union type ring joint. However, the present invention is not limited thereto. For example, the pressing ring member may be integrated with the bolt member, and the left members may be omitted based on the pressing ring member, and the omitted portion may be used as T, L, CM, CF, or the like. Of course it can.

The present invention as described above has the following technical effects.

First, the reliability of the sealing of the ring joint is improved by the pressing ring member which can seal the joint portion between the two pipes in a wider range than the conventional ring joints.

Second, the sealing member can be secondarily sealed by sealing both ends of the pressing ring member by the packing member, and if necessary, the sealing member can be interposed to seal the ring joint in a third way. Is increased. Therefore, the impact resistance is enhanced compared to the conventional ring joint.

Third, it can be easily installed by the one-touch coupling of the bolt member and the nut member, and provided with a washer member that can be freely slid with respect to the rotation of the nut member in the prior art when the pipes are bolts or nuts when coupling the bolt and nut It can be prevented from flowing while rotating with.

The invention has been described with reference to the embodiments shown in the drawings. However, the present invention is not limited thereto, and various modifications or other embodiments falling within the scope equivalent to the present invention are possible by those skilled in the art. Therefore, the true scope of protection of the present invention should be defined by the following claims.

Claims (4)

In the ring joint for connecting the first pipe and the second pipe: A bolt member coupled to an outer circumferential surface of the first pipe and having a locking step; A nut member installed to slide on an outer circumferential surface of the second pipe disposed to face the first pipe and screwed to the bolt member; A washer member interposed between an outer circumferential surface of the second pipe and an inner circumferential surface of the nut member, the washer member being slid with respect to the second pipe when the nut member is rotated and having a close contact with an inner side thereof; It is installed on the outer circumferential surface of the joint portion of the first and second pipes so that the bolt member and the nut member are spaced apart inside the bolt member so as to be in close contact while indenting the circumference of both ends of the proximal side of the first and second pipes. Compression ring member is installed as; And When the bolt member and the nut member are coupled to each other, the pressing ring member is pressed against the first and second pipes while being closely adhered to the pressing ring member side by the locking jaw and the contact jaw, and sealed by wide surface contact. In addition, by pressing the circumference of the first and second pipes to form a multi-sealed structure and to be fixed to the outer circumferential surface of the first and second pipes, the compression fixing consisting of a plurality of members provided between the bolt member and the nut member and the washer member Means; ring joint comprising a. The method of claim 1, wherein the pressing fixing means: A stopper protruding radially outward of the pressing ring member; A pair of sleeve members installed on the inner circumferential surface of the bolt member and provided with a deformable portion capable of being deformed while being in close contact with both ends of the pressing ring member, and having a catching portion caught by the stopper; When the bolt member and the nut member are screwed together, the wedge portion, which slides into the first and second pipes by the locking jaw and the close contact jaw and can recess its outer circumferential surface, is itself the center of the pipe by the pressing force. Cut portions are formed to be bent in a direction, respectively, a pair of wedge members interposed between the sleeve member and the first and second pipes; And And a pair of packing members installed to contact the inner circumferential surface of the sleeve member, the outer circumferential surfaces of the first and second pipes, and one end of the wedge member, respectively, and closely contacting both ends of the pressing ring member. Joint. The method of claim 2, And an adhesive member on the inner circumferential surface of the packing member in contact with the first and second pipes, the adhesive member being ruptured by the tight coupling of the bolt member and the nut member, to bond the surroundings. The method of claim 3, The adhesive member is a ring joint, characterized in that the epoxy resin adhesive and the curing agent are integrally formed in a ring shape.