KR19990070060A - Pipe connection - Google Patents

Abstract

The present invention mainly relates to a metal pipe fitting device to maintain the weld strength of the connector by indenting the groove in the joint portion of the connection pipe more tightly and protruding pressure projections on the inner inclined surface of the tightening nut or the gripping ring of the connector The fastening nut is fastened to the outer surface of the clamping ring so that the connection work can be efficiently carried out while the power is low, and the feature of the present invention is that the connecting nut (A) and (B) made of metal are fastened to the nut (5). In connection with the main body screw portion 2 of the connector (1) and the gripping ring portion (4) side of the connecting screw portion (3) by one side, one side of the connecting pipe (A) to maintain a certain interval (W) to the yaw groove ( 11), the inclined surface portion 7 of the tightening nut 5 is characterized in that three to four pressure protrusions 8 protrude in parallel with the traveling direction of the tightening nut 5.

Description

Pipe connection

The present invention relates to a configuration that more reasonably improved the connection device of various fluid pipes, such as water pipes, heating pipes, oil pipes, air pipes, etc. The characteristics of the present invention is to connect the pipes for fluid pipes, such as copper pipes, steel pipes and the like, union, elbow type connector In the case of fitting by fitting the recess groove on the end side of the pipe to be combined with the coupling device of the coupling device to ensure a more solid and tight sealing work.

Until now, generalized fluid pipe fittings made of metal have adopted the method of maintaining the connection state of the pipe by inserting one end of the pipe into the union connector and tightening the tightening nut 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, the sealing effect is insufficient and there is a high possibility of fluid leakage. This leakage phenomenon often occurs 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 connection port maintains the sealing effect due to the plane contact, if the connecting part receives strong tensile force by external force, it is easy to cause the tube to slip off due to the slip phenomenon. 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: Sealing of the seam should be maintained sufficiently,

Secondly, even if the connecting body is subjected to tensile stress by external force, the joint should be sufficiently protected from the separation 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 several By protruding the pressure projections, the friction area generated at the time of rotation of the tightening nut can be 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 partial cross-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 obliquely protrudes

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

10 is an exemplary view of a processing apparatus for arranging a concave groove in the connecting pipe of the present invention.

11 is another exemplary view of a processing apparatus for arranging a recess in the connector pipe of the present invention;

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

13 is a separate embodiment of the gripping ring

14 is a view showing another embodiment in which the gripping ring of FIG. 13 is divided into

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

FIG. 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 thread

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: recessed groove 12: the gripping ring

12a: auxiliary clamping ring 12b: opening part

13 work tool 13a: roller cutter

13b: Molding roller A, B: Connector

θ: tilt angle

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 joined to the clamping ring portion 4 to couple the tightening nut 5 to the connecting screw portion 3. When tightened, the inclined surface portion 7 strongly presses the gripping ring 4 inwardly so as to be in close contact with the outer surface of the one-side connecting pipe A. Keep it at

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 may protrude the pressure projection 8 to one side or both sides to the gripping ring 12 itself of FIG.

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

16 to 18 show yet 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 pipe (B) is screwed into the main body screw part (2) of the connector (1), and the connecting pipe (A) of a small diameter is inserted into the tightening nut (5), and the clamping ring part (4) on the side of the connecting screw part (3) When the fastening nut (5) is coupled to the connection screw portion (3) side, the inclined surface portion (7) inside the connection screw portion (3) pushes the clamping ring portion (4) strongly onto the connection pipe (A) to seal the function. The connection devices and methods exerted are the same as in conventional joint structures.

When connecting the metal tube (A) (B), such as a copper tube or iron tube mainly to be welded using a connector (1) of various types, such as union type, elbow type bar in the present invention for the convenience of the union type is an 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 fixed. The outer end (4a) of the gripping ring (4) is pushed into the recess groove 11 of the connecting pipe (A) is forced to be in close contact with the recess groove (11) while the deformation of its own occurs. 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. The sealing area is wider than that of the oil, which not only improves the sealing effect on the fluid. Since the groove 11 enhances the binding force with the connector A, even when a strong tensile force is exerted at the other end of the connector A, the welded part is slipped due to the strong holding force of the recess 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.

FIG. 4 shows the pressure projection 8 protruding from the inclined surface 3a formed inside the connection screw part 3 by applying the configuration of the present invention to the connector 1 provided with the metal clamping ring 12.

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

8 shows that the pressure protrusion 8 is inclined at an angle θ with respect to the axial center 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 exemplary view 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 two concave grooves are cut on both sides of the connecting pipe A. (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 has an increase in sealing force by using a two-stage structure as shown in FIGS. 13 and 14 in addition to the zero ring type as shown in FIG. 6. will be.

In view of its constituent features, the gripping ring 12 of FIG. 13 integrally connects the auxiliary ring 12a having a somewhat thin thickness 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. 15.

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. In this case, the packing 10 is surrounded around the auxiliary ring 12a. Wrap up and enter.

In the gripping ring 12 of FIG. 14, a narrow connection part 12c is installed at one side of the opening part 12b.

This 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 on the tightening nut 5 side as shown in FIG. 7. do.

When the tightening state of the tightening nut 5 is strongly progressed, the connecting part 12c is broken and the opening part 12b is narrowed to close the sealing part. 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 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 ring-shaped clamping portion 4 of the connecting tool 1 is projected into a relatively narrow ring protrusion 8a or a partially projected 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 directly contacting the clamping ring 4 with a small area. The tightening nut 5 can be fastened easily by a force.

The ring protrusions 8a and 8b exemplify a case of protruding to the connector 1 side in FIGS. 16 and 17, but if necessary, the inner inclined surface 7 of the tightening nut 5 itself, or the clamping ring. Even if it protrudes on the outer surface of (12), it has the same function.

And in the welding operation of the present invention, the cutting surface of the connecting pipe (A) should be cut in the vertical state and the recessed groove 11 from the cutting surface should be contemplated in the state of maintaining the correct distance (W) bar work tool of Figure 10 According to this, the machining of the connecting pipe body (A) of the present invention can be carried out accurately and more easily.

What is necessary is just to provide the position of the recessed groove 11 in the required position, such as the front-end | tip part of the said clamping part 1 side clamping ring part 4, the clamping ring part 12 of FIG. 5, or the intermediate part of the clamping ring 12 of FIG.

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 connector body A, the strength of the joint is kept strong and unexpected tension is applied from the outside of the connector body A. Even if it is mad, the welded portion is not relaxed by slippage or the like, so the durability and stability of the welded state is greatly extended.

③ If the gripping state of the packing ring 10 or the gripping ring 12 is greatly strengthened, and the sealing effect is extremely good, and little leakage of fluid occurs, the tightening nut 5 may not be provided with 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 gripping ring 12 is employed 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 that of the prior art.

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. The ring protrusion can play a function role of the pressure protrusion (8), it is also possible to easily tighten the tightening nut (5) with a small force.

Claims (10)

In connecting the connecting 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 connecting screw part (3) by the tightening nut (5), Maintain a predetermined interval (W) in the connecting pipe (A) to recirculate the urine groove (11) and the inclined surface portion 7 of the tightening nut (5) protrude several pressure projections (8) to the tightening nut (5) Pipe joints characterized in that. The method of claim 1, Concave groove (11) of the connecting pipe (A) is a pipe connecting device, characterized in that the main concave to match the point where the outer end (4a) of the gripping ring (4) is grounded. The method of claim 1, The pressure projection (8) is a pipe connecting device characterized in that the protrusion to achieve the inclination angle (θ) at a predetermined angle with respect to the axial direction of the tightening nut (5). The method of claim 1, A pipe connecting device, characterized in that the pressure projection (8) directly protrudes on the inclined surface (4b) of the gripping ring (4). The method of claim 1, A pipe connecting device, characterized in that the pressure projection (8) protrudes on the inclined surface (3a) side of the connection screw portion (3) of the connector (1). The method of claim 1, A pipe connecting device, characterized in that the pressure projection (8) directly protrudes to the outside of the gripping ring (12). The method of claim 1, In arranging the concave groove 11 in one side connecting body A, as illustrated in FIG. 10, in the work tool 13 in which the roller cutter 13a and the forming roller 13b are arranged at regular intervals W. Pipe connection device, characterized in that by the cutting of the connecting pipe (A) and the concave groove (11) forming at the same time. The method of claim 1, By connecting the packing 10 to the outer surface of the auxiliary ring 12a by closing the auxiliary ring 12a having a thin thickness in two stages on one side of the gripping ring 12 having the opening 12b on one side, it is sealed. Pipe connections. The method of claim 8, The gripping ring (12) and the auxiliary gripping ring (12a) is formed by dividing and connecting the narrow connection portion (12c) on one side of the gripping ring (12) side opening portion (12b). The method of claim 1, Pipe connecting device characterized in that the annular ring portion (4) of the connector (1), the inner inclined surface portion 7 of the tightening nut (5), the projection protrusions (8a) (8b) on the outer surface of the gripping ring (12) .