KR102669657B1 - Joint packing - Google Patents

Abstract

The present invention relates to joint packing, and specifically to a packing that can be inserted between the first pipe and an expansion portion formed at the end of the second pipe to interconnect the first pipe and the second pipe to perform sealing. In this case, the packing includes a main body that is ring-shaped and has a square cross-section; A notch formed in a 'V' shape on the upper surface of the main body to allow the main body to expand laterally; a first airtight protrusion extending from the lower surface of the main body and inclined in a direction in which the first pipe is inserted and in close contact with the first pipe; A second airtight protrusion is spaced apart from one side of the first airtight protrusion and extends from the lower surface of the main body, and is inclined in the same direction as the first airtight protrusion and is in close contact with the expansion portion. It is characterized in that a 'U' shaped close contact guidance groove is formed between the first airtight protrusion and the second airtight protrusion.

Description

Joint packing

The present invention relates to packing, and more specifically, to joint packing that is inserted into a connection part when connecting two pipes to prevent fluid leakage and maintain airtightness.

Piping connections for home water and sewerage require both robustness and ease of construction. They are generally manufactured by cutting to an appropriate length for easy handling, and are arranged in the required shape on site to create sockets, Connections have been made by screwing or force fitting using reducers, tees, elbows, etc.

When connecting two pipes, packing is generally used as a sealing member at the connection to prevent internal fluid from leaking.

Figure 1 is an example of piping connection using packing for conventional piping connection, and Figure 2 is a perspective view showing packing for conventional piping connection.

As shown in Figure 1, when the first pipe (1) and the second pipe (2) are connected to each other, the first pipe (1) is inserted into the second pipe (2) and overlapped, and the first pipe (1) is overlapped with the second pipe (2). The first pressure flange (3) is mounted on the pipe (1) side, and the second pressure flange (4) is mounted on the second pipe (2) side, and then the first pressure flange (3) and the second pressure flange (4) are installed. ) can be connected by fastening with bolts (5) and nuts (6).

At this time, so that the first pipe (1) can be inserted into the second pipe (2), an expansion portion () with an expanded inner diameter is formed at the end of the second pipe (2), and the first pipe (1) ) and insert the ring-shaped packing (7) into the space formed between the expansion part ( ).

And a ring-shaped support ring (8) is inserted between the first pipe (1) and the first pressure flange (3). The support ring (8) may be made of SUS material, and the first pipe (8) may be made of SUS material and has an inner peripheral surface ( A convex rib (8a) is formed so that it can be inserted into and caught in the annular support groove (1a) formed concavely along the circumferential direction of the outer peripheral surface of 1).

In addition, a pressure ring (9) made of MC nylon material is provided between the support ring (8) and the packing.

Therefore, when the first pressure flange (3) and the second pressure flange (4) are tightened, the packing (7) moves toward the support ring (8) and the pressure ring (9) moves to one side of the packing (7). Pressurize.

The pressurized packing (7) is compressed and the other side expands to come into close contact with the first pipe (1) and the expanded pipe (2a), respectively, to achieve sealing.

However, the conventional packing shown in FIG. 2 has a disadvantage of poor airtightness because its cross-section is approximately square or trapezoidal.

To solve this problem, packings of various shapes have been proposed in the past, but the optimal shape to increase airtightness is still required.

- Republic of Korea Registered Utility Model No. 20-0336910 (December 12, 2003) “Packing for synthetic resin piping with uneven surface” - Republic of Korea Registered Utility Model No. 20-0419731 (June 19, 2006) “Packing for pipe connection” - Republic of Korea Registered Utility Model No. 20-0377322 (2005.2.21.) “Packing for pipe joints”

Accordingly, the present invention is intended to solve the above-mentioned problems, and the purpose of the present invention is to provide a joint packing with an optimal shape to improve airtightness.

The joint packing according to the present invention for achieving the above object can be inserted between the expansion portion formed at the end of the second pipe and the first pipe to interconnect the first pipe and the second pipe to perform sealing. In the packing, the packing includes: a main body formed in a ring shape and having a square cross-section; A notch formed in a 'V' shape on the upper surface of the main body to allow the main body to expand laterally; a first airtight protrusion extending from the lower surface of the main body and inclined in a direction in which the first pipe is inserted and in close contact with the first pipe; A second airtight protrusion is spaced apart from one side of the first airtight protrusion and extends from the lower surface of the main body, and is inclined in the same direction as the first airtight protrusion and is in close contact with the expansion portion. A 'U' shaped close contact guidance groove may be formed between the first airtight protrusion and the second airtight protrusion.

Here, the inner angle of the notch is preferably 45 to 60°, and the angle formed by the first tight protrusion and the second tight protrusion is preferably 20 to 25°.

In addition, the inner and outer peripheral surfaces of the main body may have a structure in which convex convex portions and concave concave portions are repeated to form wavy protrusions forming a wave shape.

Additionally, the corrugated protrusions are formed on the surface of the second airtight protrusions.

Additionally, a rounded portion is formed at a point where the main body and the second airtight protrusion meet.

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

First, since a notch is formed in the packing body, the notch opens when pressed and the body can easily expand in the lateral direction, thereby improving airtightness.

Second, airtightness is improved because a close contact guide groove is formed between the first airtight protrusion and the second airtight protrusion to induce the first airtight protrusion and the second airtight protrusion to elastically spread apart.

Third, airtightness is improved because the corrugated protrusions function like O-rings.

Figure 1 is an example of piping connection using packing for conventional piping connection.
Figure 2 is a perspective view showing packing for conventional piping connection.
Figure 3 is a perspective view and cross-sectional view showing joint packing according to an embodiment of the present invention.
Figure 4 is a state of use of the present invention

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the attached drawings.

For reference, the description with reference to the drawings is for easier understanding of the present invention, and the scope of the present invention is not limited thereto. In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

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

Referring to the drawing, the joint packing according to an embodiment of the present invention includes a main body 100, a notch 200, a first airtight protrusion 300, a second airtight protrusion 400, and a close contact guide groove 500. It may be configured to include a corrugated protrusion 600.

First, the main body 100 will be described.

The main body 100 has an overall circular ring shape. And the shape of the vertical cross-section may be approximately square.

In addition, since the main body 100 is made of an elastic material such as rubber, its shape is deformed when pressed from one side and can be restored to its original state when the force is removed. Therefore, when force is applied from the top and bottom of the main body 100, it expands to both sides and is deformed and flattened, and then can be restored to its original shape when the pressing force is removed.

For reference, the inner diameter of the main body 100 is formed to be the same as the outer diameter of the inserted first tube 1, making it easy to insert the first tube 1 into the main body 100.

Next, the notch 200 will be described.

The notch 200 is a groove formed concavely on the upper surface of the main body 100.

The cross-sectional shape of the notch 200 may be formed in various ways, but is preferably a 'V' shape.

This is to facilitate expansion on both sides when the upper surface of the main body 100 is pressed.

In other words, since the pressing force is concentrated on both sides of the notch 200 and applied in a direction that pushes to both sides around the notch, the upper part of the main body 100 opens to both sides and expands, forming the first pipe ( 1) and can be firmly adhered to the expansion part (2a).

Here, the inner angle (N) of the notch 200 is preferably 45 to 60°.

If the inner angle of the notch 200 is smaller than 45°, it approaches the state without the notch 200, so expansion does not occur easily when the main body 100 is pressed.

On the other hand, if the inner angle of the notch 200 is larger than 60°, the main body 100 is already in an open state, so the degree to which it expands to both sides when actually pressed is weakened.

Preferably, the inner angle of the notch 200 is approximately 50°.

Next, the first airtight protrusion 300 will be described.

The first airtight protrusion 300 extends downward from the lower surface of the main body 100 and is formed to be thin to have a thickness smaller than that of the main body 100.

In addition, the first airtight protrusion 300 is formed to be inclined inward toward the outer peripheral surface of the first pipe 1 and has a tapered structure in which the thickness decreases toward the end and a sharp end 310 is formed, so that the first pipe 1 has a tapered structure. (1) Easy to adhere to.

In addition, the inner diameter of the attachment 310 of the first airtight protrusion 300 is formed smaller than the inner diameter of the first pipe 1, thereby improving adhesion to the first pipe 1.

In addition, the first airtight protrusion 300 may be formed continuously along the main body to form a circular shape and be integrally molded with the main body 100.

Next, the second airtight protrusion 400 will be described.

The second airtight protrusion 400 may have a similar shape to the first airtight protrusion.

That is, it extends and protrudes from the lower surface of the main body 100 and is formed adjacent to one side of the first airtight protrusion 300 and spaced apart.

And the second airtight protrusion 400 is also formed to be inclined inward in the same direction as the first airtight protrusion 300.

In addition, the thickness of the second airtight protrusion 400 is formed to be smaller than the thickness of the main body 100, and the thickness decreases toward the end, so that the second airtight protrusion 400 may have a tapered structure with a sharp tip 410 formed.

Accordingly, the second airtight protrusion 400 can be in close contact with the inner surface of the tapered expansion portion 2a of the second pipe 2.

Here, the first airtight protrusion 300 and the second airtight protrusion 400 are spaced apart at a certain distance, and a close contact guidance groove 500 is formed inside the meeting point.

The adhesion guiding groove 500 prevents the first airtight protrusion 300 and the second airtight protrusion 400 from easily overlapping each other when pressed, and rather induces them to spread apart.

That is, as the close contact guidance groove 500 is formed, the attachments of the first airtight protrusion 300 and the second airtight protrusion 400 overlap each other and are in close contact with each other, but the periphery of the close contact guidance groove 500 is in close contact with each other. A space is formed by receiving resistance so that the first airtight protrusion 300 and the second airtight protrusion 400 are opened and provide elasticity to be restored.

Therefore, the first airtight protrusion 300 receives an elastic force to come into closer contact with the first pipe 1, and the second airtight protrusion 400 comes into close contact with the expansion portion 2a of the second pipe 2. It can receive as much elastic force as possible.

For reference, the close contact guidance groove 500 may have a cross-sectional shape such as 'V' or '┗┛', but it is preferable to have a 'U' shape. This is because the elastic force that causes it to unfold rather than fold is greatest when the cross section is formed to be round.

Meanwhile, the angle S formed between the first airtight protrusion 300 and the second airtight protrusion 400 is preferably 20 to 25°.

Specifically, the angle formed between the outer surface of the first airtight protrusion 300 and the inner surface of the second airtight protrusion is 20 to 25°, and 23° is most preferable.

If it is less than 20°, the elastic force to spread the first airtight protrusion 300 and the second airtight protrusion 400 decreases rapidly, so the adhesion force is reduced and airtightness is reduced.

On the other hand, if it is larger than 25°, the elastic force to spread becomes too strong, which reduces assembly properties, and the area in which the second airtight protrusion 400 is in close contact with the expanded tube 2a decreases, which also reduces airtightness.

Next, another embodiment of the present invention will be described.

Another embodiment of the present invention may have a structure in which corrugated protrusions 600 are formed on the inner and outer peripheral surfaces of the main body 100.

The wave-shaped protrusion 600 forms a wave-shaped cross section by repeating convex convex portions (mountains) and concave concave portions (valleys). And the corrugated protrusions 600 may be formed as one or more.

In addition, the wave-shaped protrusion 600 is preferably formed on the outer surface of the second airtight protrusion 400.

These wave-shaped protrusions 600 are formed in a round shape and can act like an O-ring.

That is, when the main body 100 is compressed by pressing force, the corrugated protrusions 600 expand laterally and are compressed and strongly adhered to the outer peripheral surface of the first pipe 1 and the inner peripheral surface of the expanded tube 2a. there is.

In addition, a rounded portion 110 is formed at the point where the main body 100 and the second airtight protrusion 400 meet, so that when the main body 100 is compressed, it is deformed and pushed along the expansion part 2a, thereby expanding the expansion. It can be brought into closer contact with the edge of the crown portion (2a).

Below, the state of use of the present invention will be described with reference to FIG. 4. Figure 4 shows a state diagram of the present invention.

As shown, the joint packing according to the present invention is sandwiched between the two pipes to be connected, that is, the first pipe (1) and the second pipe (2), and is configured to airtightly prevent leakage of fluid flowing through the two pipes. am.

In order to connect the first pipe (1) and the second pipe (2), the first pressure flange (3) is penetrated and mounted on the first pipe (1), and then the annular support groove (1a) is formed. Insert the support ring (8) into it, and also insert the pressure ring (9) and packing (7) in that order.

Also, the second pressure flange (4) is penetrated and mounted on the second pipe (2), and the end of the first pipe (1) is inserted and connected to the second pipe (2), wherein the packing (7) ) is inserted into the expanded tube (2a).

In this state, when the first pressure flange (3) and the second pressure flange (4) are fastened and tightened with the bolt (5) and nut (6), the first pressure flange (3) is connected to the support ring (8). Since it is supported by the second pressure flange (4) while pushing the expansion part (2a), the packing (7) is compressed by the pressure ring (9) and deformation occurs as shown in FIG. do.

That is, as the main body 100 is compressed, the notch 200 opens and the inner and outer peripheral surfaces of the main body 100 expand, respectively.

As a result, the corrugated protrusions 600 are distorted and strongly adhered to the outer peripheral surface of the first pipe 1 and the inner peripheral surface of the expanded tube 2a, respectively, thereby performing sealing.

And the first airtight protrusion 300 is in close contact with the outer peripheral surface of the first pipe 1, and the second airtight protrusion 400 overcomes the resistance and elasticity of the close contact guidance groove 500 and It overlaps with the airtight protrusion 300. At this time, the adhesion guide groove 500 does not disappear as shown, but forms a space shaped like a water drop.

Therefore, as described above, due to the elasticity of the close contact guidance groove 500 to open, the first airtight protrusion 300 and the second airtight protrusion 400 receive elastic force in the opening direction, respectively, and the first pipe (1) ) can be more strongly adhered to the outer circumferential surface of the expansion portion (2a) and the inner circumferential surface of the expanded tube (2a). In other words, confidentiality is greatly improved.

Although representative embodiments of the present invention have been described above with reference to the drawings, those skilled in the art will be able to make various applications and modifications within the scope of the present invention based on the above contents. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims described later but also by equivalents to the claims.

1: Pipe 1 1a: Annular groove
2: 2nd tube 2a: Expansion part
3: first pressure flange 4: second pressure flange
5: Bolt 6: Nut
7: Packing 8: Support ring
8a: Rib 9: Pressure ring
100: main body 110: rounding part
200: notch
300: First confidential protrusion 310: Attachment
400: Second confidential protrusion 410: Attachment
500: Close contact guidance groove
600: wave protrusion

Claims (6)

In the packing that can be inserted between the first pipe and the expansion formed at the end of the second pipe to interconnect the first pipe and the second pipe to perform sealing,
The packing is,
A main body that is shaped like a ring and has a rectangular cross-section, with wavy protrusions formed by repeating convex convex portions and concave concave portions on the inner and outer peripheral surfaces.
A notch formed on the upper surface of the main body in a 'V' shape with an inner angle of 45 to 60° to allow the main body to expand laterally;
It extends from the lower surface of the main body, is inclined in the direction in which the first pipe is inserted, and has a tapered structure where the thickness decreases toward the end to form a sharp end, and the inner diameter of the attachment is larger than the inner diameter of the first pipe. formed small A first airtight protrusion in close contact with the first pipe;
It is spaced apart from one side of the first airtight protrusion and extends from the lower surface of the main body, is inclined in the same direction as the first airtight protrusion, is formed to be smaller than the thickness of the main body, and has a sharp end with a thickness that decreases toward the end. It includes a second airtight protrusion that is formed in a tapered structure and is in close contact with the expanded tube,
Between the first airtight protrusion and the second airtight protrusion, a 'U' shaped close contact guide groove is formed so that the attachments are overlapped and in surface contact but can be spread, and the outer surface of the first airtight protrusion and the inner surface of the second airtight protrusion are formed. Joint packing characterized in that it is formed to be spaced apart by opening at 20 to 25°. delete delete delete According to claim 1,
Joint packing, characterized in that the wave-shaped protrusion is also formed on the surface of the second airtight protrusion.
delete