KR100258025B1 - Pipe connecter - Google Patents

Abstract

PURPOSE: A connecting device of pipes is provided to easily and firmly fasten a nut by reducing a frictional area formed by rotation of the nut by improving combination of a connecting pipe with a connecting unit into an irregularity state and forming pressure protrusions in the inner wall of the nut or in a narrow ring of the connecting unit body. CONSTITUTION: A recessed groove(11) is formed in a portion of a connecting pipe(A), and an outer end(4a) of a narrow ring(4) is accurately placed in the recessed groove. Upon strongly fastening a nut(5) with a connecting screw(3), an inclined face(7) of the nut pushes the outer end of the narrow ring into the recessed groove. Then, the outer end is deformed and firmly settled state of the outer end and the recessed groove is retained. As packing ring(10) is adhered to the connecting pipe, closure is realized at two parts. Thus, closure area is enlarged and closure effect to a fluid is improved. As the recessed groove enhances a settling force, a strong holding force of the recessed groove avoids displacement of a pipe joint although a strong tensile force is applied from another end of the connecting pipe. Further, a frictional area between the inclined face and the narrow ring is reduced and a force for manipulating a tool is reduced.

Description

Pipe connection

The present invention relates to a configuration that more reasonably improved the connection device of various fluid pipes such as water supply pipe, heating pipe, oil pipe, air pipe, etc. As a feature of the present invention, the connection pipe of the fluid pipe, such as copper and steel pipe, union, elbow type In the case of fitting by fitting the groove in the end side of the pipe to the coupling of the coupling device of the coupling device is to ensure a more robust and tight sealing work.

Until now, generalized fluid pipe fittings made of metal have adopted a method of inserting one end of a pipe into a union connector and tightening a tightening nut to maintain the connection state of the pipe body while keeping the packing ring in close contact.

However, such a conventional fitting device had the following problems.

① The contact area where the inclined surface formed inside the nut for the body is grounded with the clamping ring of the connector body is relatively wide, so the frictional resistance is large, so the force of turning the nut is high and the working efficiency is very low.

② If the tightness of the nut is not strong, there is a high possibility of fluid leakage due to insufficient sealing effect, and this leakage phenomenon is often generated when a considerable time has passed after the welding operation. It is difficult to expect the reliability of

③ Since the grounding surface of the connecting pipe and the connector maintains the sealing effect due to the plane contact, if the connecting part receives a strong tensile force by external force, it is easy to cause the pipe to slip off due to slip phenomenon, so it is subject to the tensile stress of the pipe. Not suitable as a fitting system.

The present invention is characterized by more reasonably improving the structural irrationality of such a conventional fitting system.

The physical characteristic required as a pipe fitting of the tube is

First: the seal of the joint should be maintained sufficiently.

Second: Even if the connecting pipe is subjected to tensile stress by external force, the joint should be sufficiently protected from slipping of the pipe and the connector such as slip.

SUMMARY OF THE INVENTION In view of the above problems, the present invention improves the engagement with the connector to the concave-convex coupling state by recirculating the concave groove in the joint portion of the connecting pipe, and also provides a plurality of gripping rings in the inner wall of the tightening nut or the connector body part. By protruding the pressure projections, the friction area generated when the tightening nut is rotated is greatly reduced, so that the tightening nut can be tightened with a relatively low force while tightening the nut.

1 is an exploded perspective view of the configuration of the present invention.

2 is a cross-sectional view showing a pipe connection state.

3 is a cross-sectional view taken along the line C-C of FIG.

Figure 4 is a separate embodiment applying the configuration of the present invention to a connector having a packing ring.

5 is a partially cutaway sectional view of FIG.

6 is an exemplary view protruding the pressure protrusion of the present invention in the configuration of the packing ring.

7 is a cross-sectional view of the tightening nut.

8 is a modified embodiment in which the pressure protrusion is inclined.

9 is an exemplary view of forming a pressure protrusion in the connector having a core tube.

10 is an illustration of a processing device for recessing the recess groove in the connecting pipe of the present invention.

Figure 11 is another illustration of a processing device for recessing the recess groove in the connecting pipe of the present invention.

12 is an exemplary view of applying the connecting device of the present invention to the corrugated pipe.

13 is a separate embodiment of the gripping ring.

14 is another embodiment in which the gripping ring of FIG.

15 is a cross-sectional view of the state of use of FIG.

Figure 16 is a separate embodiment of the protrusion ring annulus in the gripping ring.

17 is a modified embodiment of FIG.

18 is a cross-sectional view of the state of use of FIG.

* Explanation of symbols for main parts of the drawings

1: Connector 2: Body Screw

3: connecting screw part 3a: inclined surface

4: Gripping ring part 4a: Outer end

4b: slope 5: tightening nut

6 threaded portion 7 inclined surface portion

8: pressure protrusion 8a, 8b: ring protrusion

9: tightening nut 10: packing ring

11: concave groove 12: gripping ring

12a: auxiliary clamping ring 12b: opening part

13 work tool 13a: roller cutter

13b: forming roller 13a: roller cutter

θ: Angle of inclination A, B: Connector

1 is a perspective view showing the configuration of the present invention.

The connecting pipes (A) and (B) mainly target metal pipes such as copper pipes and steel pipes, but can also be applied to pipe joints of rigid synthetic resin pipes such as PVC.

The connector 1 has a main body screw portion 2 and a connecting screw portion 3 formed on both sides as in a conventional configuration, and a gripping ring portion 4 forming a slight inclined surface is formed on the outside of the connecting screw portion 3, The tightening nut 5 has a threaded portion 6 coupled to the connecting screw portion 3 and an inclined surface portion 7 coupled to the clamping ring portion 4 to couple the tightening nut 5 to the connecting screw portion 3. Inclined surface portion 7 is formed, and the tightening nut 5 is coupled to the connection screw portion 3 to tighten the inclined surface portion 7 by pressing the clamping ring portion 4 inwardly. In close contact with the outer surface and the packing ring 10 is fitted inside the gripping ring 4 to maintain the tube state in a sealed state.

This configuration is characterized by the addition of the following two new technical configurations as the existing hinge device.

① Connect the conduit (A) in charge of the welding state to maintain a certain distance (W) with the end side to recirculate the recessed groove (11).

The position of the concave groove 11 maintains a constant gap W so that the end side of the gripping ring 4 can be coupled to the concave groove 11 when the connecting pipe A is inserted into the gripping ring 4. .

② Protrude several pressure protrusions (8) on the inner inclined surface portion (7) of the tightening nut (5).

4 illustrates a case where the gripping ring 12 is present as another embodiment of the present invention.

In other words, in the case of the connecting device in which the clamping ring 12 is interposed between the connector 1 and the tightening nut 5, the pressure protrusion 8 protrudes from the inner inclined surface 3a side of the connecting screw portion 3.

6 is a further embodiment of the present invention can protrude the pressure projection 8 to one side or both sides to the gripping ring 12 itself of FIG.

13 and 14 are to form a two-stage structure of the gripping ring 12 to be applied to the present invention to further improve the sealing force, Figure 13 is an integral structure, Figure 14 is divided Mold structure.

16 to 18 show another embodiment configured to facilitate tightening of the tightening nut 5 by returning the ring protrusions 8a and 8b to the tape-like gripping ring 4 of the connector 1.

Referring to the effects of the present invention as described above are as follows.

A large diameter connecting tube B is screwed into the main body screw portion 2 of the connector 1, and a small diameter connecting tube A is inserted into the tightening nut 5, and the clamping ring portion 4 on the connecting screw portion 3 side is inserted. When the fastening nut (5) is coupled to the connection screw part (3) side, the image forming surface part (7) inside the connection screw part (3) strongly pushes the clamping ring part (4) toward the connector body (A) side, and the sealing function The connection device and method to be utilized are the same as the generalized joint structure.

When connecting the metal pipe (A) (B), such as copper pipe or steel pipe mainly to be welded using a connector (1) of various forms, such as union type, elbow bar bar in the present invention for the convenience of the typical union type example The fitting apparatus will be described.

The connector 1 is formed with a main body screw portion 2 on one side to connect one side of the connecting pipe (B) by screwing.

And the other side connection screw portion (3) inserting the packing ring (10) on the inside and the clamping nut (5) is coupled to the clamping ring (4) protruding the other connection pipe (A) at the tip of the connection screw portion (3) Pushing in and tightening the tightening nut 5 strongly, the clamping ring portion 4 is compressed to the inclined surface portion 7 formed inside the tightening nut 5 so that the packing ring 10 adheres closely to the connecting pipe A. As a result, both connecting pipes (A) and (B) are connected to each other in a sealed state.

This connection structure may be referred to as a general configuration already preceded.

According to the present invention, the concave convex groove 11 is provided at one side of the connecting pipe A at a predetermined interval W, so that the outer end 4a of the gripping ring 4 is provided in the concave groove 11. As shown in FIG. 2, when the tightening nut 5 is firmly fastened to the connecting screw part 3, the inclined surface part 7 of the tightening nut 5 causes the outer end 4a of the clamping ring part 4 to be above. The outer end 4a of the gripping ring 4 is pushed into the recessed groove 11 of the connecting pipe A, and thus, the deformation of the clamping ring 4 is forced to the recessed groove 11 and engaged with each other. While maintaining a strong binding state, the built-in packing ring 10 is strongly adhered to the connecting pipe (A) so that the sealing part is made at the same time in the packing ring 10 part and the recessed groove 11 part at the same time. Compared to this, the sealing area is wider than that, which not only improves the sealing effect on the fluid. Since the mouth groove 11 enhances the binding force with the connector body A, even when a strong tensile force is exerted at the other end of the connector body A, the joint part is slipped due to the strong holding force of the recessed groove 11. As a result, a closed end that escapes from the connector 1 does not occur.

Then, when the tightening nut 5 is coupled to the connecting screw part 3 and tightened, the clamping ring part 4 is in a state where the inclined surface part 7 of the inner side and the inclined surface 4b of the clamping ring part 4 are pressed against each other in a planar state. Since it is in close contact with the indentation groove 11, the friction area is relatively wide, so that the operation of the tool, such as a monkey spanner is relatively expensive in other operations.

In the present invention, in order to solve the above problems, the pressure protrusions 8 are tightened by turning the tightening nuts 5 by protruding several pressure protrusions 8 on the inclined surface portion 7 of the tightening nut 5. Partially grounded to the outer surface of the ring portion 4, the clamping ring portion 4 is strongly adhered to the connecting pipe (A) side.

Therefore, the friction area between the inclined surface portion 7 and the gripping ring portion 4 of the tightening nut 5 is greatly reduced when the tightening nut 5 is turned to perform the welding operation. Therefore, the force required by the tool operation during the welding operation is significantly reduced. This ensures ease of operation and efficiency.

When the tightening nut 5 is firmly tightened in the final step, the pressure protrusion 8 digs the outer surface of the clamping ring 4 to cause deformation, while the inclined surface portion 7 of the tightening nut 5 is clamped. 4) and the overall surface contact is maintained to maintain the overall close contact state at the time of the completion of the contact force of the gripping ring portion (4) to the connecting body (A) has a further improved effect than the conventional case.

Protruding height of the pressure projection (8) needs to maintain the appropriate height in consideration of the material properties of the connecting pipe (A).

The pressure protrusion 8 protruding from the inclined surface portion 7 of the tightening nut 5 reduces the friction area due to the rotational operation of the tightening nut 5 while maintaining sufficient sealing force of the tubing nut, thereby making it easier to weld. The purpose of the present invention is that the installation position of the pressure protrusion 8 is not limited to the tightening nut 5 but may also be applied to the connector 1 itself or a fitting device having the clamping ring 12.

The following shows an embodiment in which the installation of the pressure protrusion 8 is applied to various fitting means.

4 shows the configuration of the present invention applied to the connector 1 provided with the metal clamping ring 12. The pressure projection 8 protrudes from the inclined surface 3a formed on the inner side of the connecting screw portion 3.

6 is a projection of the pressure protrusion 8 on one side or both sides of the metal clamping ring 12 of FIG.

8 shows the pressure protrusion 8 protruding inclined at a predetermined angle θ with respect to the axial direction, thereby further reducing the frictional force due to sliding of the pressure protrusion 8.

9 is a projection of the pressure projection 8 on the inner wall of the connection screw portion 3 of the connector 1 with the core tube 1a.

10 is an illustration of a work tool for arranging the concave groove 11 in the connecting pipe (A).

The work tool 13 has the roller cutter 13a and the concave groove forming roller 13b spaced at a predetermined interval W to repeatedly rotate the main surface of the connecting pipe A several times so that the abutment surface is formed by the roller cutter 13a. The cutting roller 13b concaves the recessed groove 11 on the main surface of the connecting pipe A while maintaining a constant gap W while being cut vertically.

FIG. 11 is a separate embodiment of the work tool, in which two forming rollers 13b are laid on the left and right sides of one roller cutter 13a in the work tool 13, and the cutting pipe 2 is cut and two recessed grooves on both sides. (11) can be molded at the same time.

Figure 12 is an exemplary view showing that the connector 1 of the present invention can also be applied as a connecting means of the corrugated tube or spiral tube.

On the other hand, the gripping ring 12 applied to the present invention can obtain the effect of increasing the sealing force by using the two-stage structure as shown in FIGS. 13 and 14 in addition to the O-ring type as shown in FIG. It is.

In view of its constitutional features, the gripping ring 12 of FIG. 13 integrally connects the auxiliary ring 12a, which is a somewhat thin structure, to one side of the body part having the inclined opening 12b, thereby supporting the auxiliary ring 12a. The packing 10 is enclosed on the side and applied to the fitting system as shown in FIG.

At this time, the protrusion 12c corresponding to the recessed groove 11 of the connecting pipe A may protrude to the required position inside the gripping ring 12.

FIG. 14 is a separate embodiment in which the clamping ring 12 body part and the auxiliary ring 12a are dividedly formed in the structure of FIG. 13 described above. In this case, the packing 10 is surrounded around the auxiliary ring 12a. Wrap up and enter.

The gripping ring 12 of FIG. 14 is provided with a narrow connection part 12c on one side of the opening part 12b.

The connecting portion 12c serves to allow the pressure protrusion 8 to rotate flexibly without being caught by the opening 12b side when the pressure protrusion 8 protrudes from the tightening nut 5 side as shown in FIG. do.

When the tightening state of the tightening nut 5 is strongly progressed, the connection part 12c is destroyed and the opening part 12b is narrowed to close the sealing operation. Since the auxiliary ring 12a is also thin, the packing 10 is easily formed together with the packing 10. Compression-deformation and close contact with the connecting pipe (A) side to maintain the best sealing state.

The packing 10 coupled to the auxiliary ring 12a may be widened to cover the inner surface of the gripping ring 12 so as to be joined to the connecting pipe (A).

The configuration of the two-stage gripping ring 12 can be applied as it is to a generalized joint system so far, and its practicality is expected.

FIG. 16 shows another embodiment in which the tightening nut 5 is made easier in the configuration of the present invention.

When the tapered gripping ring 4 of the connector 1 is projected into a relatively narrow ring protrusion 8a or a partial projection type ring protrusion 8b similar to the ring protrusion as shown in FIG. 17, the tightening nut 5 As shown in FIG. 18, the inner inclined surface 7 of the tightening nut 5 is partially contacted with the annular protrusions 8a and 8b without direct surface contact with the clamping ring 4, as illustrated in FIG. The tightening nut 5 can be fastened easily by a force.

The ring protrusions 8a and 8b exemplify the case where they protrude toward the connector 1 in Figs. 16 and 17, but if necessary, the inner inclined surface 7 of the tightening nut 5 itself, or the above-mentioned. Even if it protrudes on the outer surface of the gripping ring 12, it has the same function.

And in the welding operation of the present invention, the cutting surface of the connector (A) should be cut in a vertical state, and the recessed groove 11 should be contemplated while maintaining the correct distance (W) from the cutting surface. According to this, the machining of the connecting pipe body (A) of the present invention can be carried out accurately and more easily.

The position of the concave groove 11 may be appropriately provided at a required position such as the tip of the connector 1 side gripping ring 4, the gripping ring 12 of FIG. 5, or the middle part of the gripping ring 12 of FIG. 13.

The present invention has the effect of excellent sealing force and excellent resistance to tensile stress in the welded state of the connector body significantly extended compared to the conventional.

The advantages of the device of the present invention are specifically listed as follows.

① When inserting the connecting pipe (A) into the clamping ring (4) of the connector (1) and turning the tightening nut (5) to perform the connection work, the inclined surface portion of the tightening nut (5) by the pressure protrusion (8) 7) Since the friction area which is grounded on the inclined surface of the gripping ring 4 is much smaller, the tightening nut 5 can be easily rotated with a relatively small force, so that the work efficiency is greatly increased and the work efficiency is greatly improved.

(2) Since the joint is made in the state where the tip side of the gripping ring portion (4) is indented in close contact with the recessed groove (11) formed in the connecting pipe (A), the welding strength is kept strong and unexpected tensile force outside the connecting pipe (A). Even if this madness occurs, the welded portion is not relaxed by slippage or the like, so the durability and safety of the welded state is greatly extended.

③ The clamping state of the packing ring 10 or the gripping ring 12 is greatly strengthened, and the sealing effect is extremely good, so that the leakage of the fluid hardly occurs, and the tightening nut 5 is used for the locking operation of the pressure protrusion 8. As a result, the bond strength is strengthened, and there is no loosening after the death.

④ There is almost no risk of inadvertent coupling due to inadvertent connection. Therefore, it is possible to maintain the stability of the fitting system in the long term.

(5) As the structure of the holding ring 12 is adopted in a two-stage structure as illustrated in Figs. 13 and 14, it is possible to bring about an effect of increasing the sealing force which is much better than the conventional one.

⑥ In the case of projecting the ring projections 8a and 8b on the gripping ring portion 4 of the connector 1, the inner inclined surface portion 7 of the tightening nut 5 and the outer surface of the gripping ring portion 12, as in 16-17. These ring protrusions can play a function role of the pressure protrusion 8 can also easily tighten the tightening nut 5 with a small force.

Claims (10)

In the connection pipe body (A) (B) made of metal to the main thread part (2) of the connector (1) and the clamping ring part (4) side of the connection screw part (3) by the tightening nut (5), the connection Maintain a certain interval (W) in the pipe body (A) to recirculate the inlet groove 11, and to the inclined surface portion 7 of the tightening nut (5) a number of pressure projections (8) protruding to the tightening nut (5). Characterized by a pipe connection. The pipe connecting device according to claim 1, wherein the recessed groove (11) of the connecting pipe (A) is arranged so as to coincide with the point at which the outer end (4a) of the gripping ring (4) is grounded. The pipe connecting device according to claim 1, wherein the pressure protrusion (8) protrudes to form an inclination angle (θ) at an angle with respect to the axial direction of the tightening nut (5). The pipe connecting device according to claim 1, wherein the pressure protrusion (8) projects directly on the inclined surface (4b) of the gripping ring (4). The pipe connecting device according to claim 1, wherein the pressure protrusion (8) protrudes on the inclined surface (3a) side of the connection screw portion (3) of the connector (1). The pipe connecting device according to claim 1, wherein the pressure protrusion (8) projects directly outwardly of the clamping ring (12). The method according to claim 1, wherein in arranging the concave groove 11 in one side of the connecting pipe A, the roller cutter 13a and the forming roller 13b are axially spaced at a predetermined interval W as illustrated in FIG. Pipe connecting device, characterized in that the cutting of the connecting pipe (A) and the concave groove (11) formed by the snow work tool 13 at the same time. According to claim 1, One side of the gripping ring (12b) having an opening (12b) on one side of the thin ring auxiliary ring (12a) is connected in two stages to the packing 10 on the outer surface of the auxiliary ring (12a) Pipe connection device characterized in that the sealing. The pipe according to claim 8, characterized in that the gripping ring (12) and the auxiliary gripping ring (12a) are formed by dividing, and the narrow connection part (12c) is presented to one side of the opening part (12b) of the gripping ring (12). Connector. 2. The ring projections 8a and 8b of claim 1, wherein the clamping ring portion 4 of the connector 1, the inner inclined surface portion 7 of the tightening nut 5, and the outer surface of the clamping ring portion 12 are projected. Pipe connections.