KR102639192B1 - Apparatus for connecting pipes - Google Patents

Abstract

A pipe connecting device according to an embodiment of the present invention includes a connection socket into which an expandable pipe having an expanded pipe is inserted through one end and a branch pipe is inserted through the other end; A seal ring fitted to the outer peripheral surface of the expansion pipe; A pipe connection device including an expandable pipe fixing means that prevents the expandable pipe from being separated from the connection socket, wherein the expandable pipe fixing means is inserted into the connection socket while being inserted into the outer circumferential surface of the expandable pipe, and the outer circumferential surface It includes a coupler in which an inner locking groove is formed, at least a portion of which is received in the inner locking groove, a fixing ring in the shape of a C-ring and made of an elastic material whose diameter can be increased or decreased, and on the inner peripheral surface of the connection socket. It is characterized in that an outer locking groove is formed into which the remaining part of the fixing ring is held.

Description

Apparatus for connecting pipes}

The present invention relates to a piping connection device.

Newly constructed piping for sprinkler equipment refers to a flexible pipe that can be bent that connects the branch pipe branching from the main pipe among the piping of sprinkler equipment and the head of the sprinkler.

Additionally, a pipe connecting device is used to connect the newly constructed pipe to the branch pipe. The conventional piping connection device refers to a connection socket for a sprinkler disclosed in the prior art below.

According to the prior art below, the new pipe and the water supply pipe (corresponding to the branch pipe) are connected by a socket body. In addition, a first expansion part and a second expansion part are formed at both ends of the expansion pipe, so that the expansion pipe does not fall out when inserted into the socket body, and water is supplied by a seal ring surrounding the outer peripheral surface of the expansion pipe. Water leakage is blocked.

However, the conventional piping connection device having a structure as disclosed in the prior art below has the following problems.

First, there is a disadvantage in that the manufacturing process is complicated because a pipe terminal process to form the first expansion part and a bulging process to form the second expansion part must be performed.

Second, when inserting the expandable pipe into the socket body, there is a disadvantage in that the seal ring is curled due to friction and moves out of the sealing groove, causing damage to the seal ring.

Third, there is a disadvantage in that it cannot be guaranteed that the sealing pressure that the sealing can withstand is maintained constant.

Fourth, during the expansion operation to form the second expansion portion, the end of the inner peripheral surface of the socket body in contact with the second expansion portion may be damaged due to expansion pressure.

Fifth, if a separate outer sealing is installed to prevent damage to the socket body due to expansion work, there is a disadvantage in that manufacturing costs increase.

Sixth, the pipe expansion process for forming the second expansion portion is a process of inserting a rubber ring into the interior of the expandable pipe and compressing the rubber ring in the radial direction. Due to the decrease in elasticity of the rubber ring due to aging or a decrease in volume due to wear, there is a disadvantage in that it is difficult to ensure the exact formation position or size of the second expansion part.

Furthermore, there is a disadvantage in that it is not easy to ensure stability even if the outer sealing is installed.

Seventh, if the formation position and size of the second expansion part are not accurate, there is a disadvantage in that the expansion pipe swings in the axial direction due to dimensional deviation or the compression of the sealing becomes weak, increasing the possibility of water leakage.

Eighth, there is a disadvantage that the rigidity of the second expansion portion formed through the expansion process is not secured and may be damaged.

Korean Patent Publication No. 10-2022-0112931 (August 12, 2022)

The present invention is proposed to improve the above problems.

A pipe connecting device according to an embodiment of the present invention proposed to improve the above problems includes a connection socket into which an expandable pipe having an expanded pipe is inserted through one end and a branch pipe is inserted through the other end; A seal ring fitted on the outer peripheral surface of the expansion pipe, including an outer ring fitted on the outside of the expanded pipe, and an inner ring fitted on the inside of the expanded pipe; A pipe connection device comprising an expandable pipe fixing means for preventing the expandable pipe from being separated from the connection socket, wherein the inner diameter of one end of the connection socket through which the expandable pipe passes is at least larger than the outer diameter of the expanded pipe, On the inner peripheral surface of the connection socket, an annular insertion limit protrusion that sets an insertion limit of the expandable pipe protrudes at a point spaced a predetermined distance from one end and the other end of the connect socket, and the expandable pipe fixing means includes, A coupler is inserted into the connection socket while being inserted into the outer peripheral surface of the expandable pipe and has an inner locking groove formed on the outer peripheral surface, and a C-ring shape made of an elastic material whose diameter increases when the external force acting in the center direction is removed. It includes a fixing ring, and an outer locking groove is formed on an inner peripheral surface of the connection socket. The fixing ring includes a ring body, at least a portion of which is accommodated in the inner locking groove, and a front end of the ring body bent radially outward. , at least a portion of it is received in the outer locking groove, and the expandable pipe is inserted into the connection socket with the coupler and the seal ring in a state where the fixing ring is inserted into the inner locking groove both coupled to the outer peripheral surface. It is characterized by being

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The piping connection device according to an embodiment of the present invention configured as described above has the following effects.

First, the manufacturing process is shortened because the conventional bulging process to form the second expansion part is not required.

Second, unlike the conventional manufacturing process in which the expansion pipe is inserted into the socket body and then terminated, the present invention performs termination work on the end of the expansion pipe and then inserted into the connection socket (corresponding to the conventional socket body), This has the effect of simplifying the manufacturing process.

Third, the problem of the conventional second expansion part, that is, the possibility that the expansion part is distorted over time or when vibration continues to act, weakening the compressive force acting on the sealing, is eliminated, so there is an advantage that there is no risk of water leakage.

Fourth, since the connection of the expandable pipe is irreversible due to the stopper provided in the fixing ring, there is an advantage that the expandable pipe does not separate over time.

Fifth, there is an advantage in ensuring assembly stability because the sealing does not curl and is chewed or pushed out during the process of inserting the expandable pipe into the connection socket.

1 is a perspective view of a piping connection device according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of the piping connection device.
Figure 3 is a perspective view of a coupler constituting a pipe connection device according to an embodiment of the present invention.
Figure 4 is a perspective view of a fixing ring constituting a pipe connection device according to an embodiment of the present invention.
Figure 5 is a cut-away perspective view of a connection socket constituting a pipe connection device according to an embodiment of the present invention.
Figure 6 is a cross-sectional view of the pipe connection device according to the present invention showing the state before the coupler is inserted into the connection socket.
Figure 7 is a cross-sectional view of the pipe connection device showing the coupler fully inserted into the connection socket.

Hereinafter, a piping connection device according to an embodiment of the present invention will be described in detail with reference to the drawings.

Figure 1 is a perspective view of a pipe connection device according to an embodiment of the present invention, and Figure 2 is an exploded perspective view of the pipe connection device.

Referring to FIGS. 1 and 2 , the pipe connecting device 10 according to an embodiment of the present invention can be understood as a device that connects the newly built pipe 20 to the branch pipe 30 (see FIG. 6 ).

In detail, the pipe connection device 10 includes a connection socket 11 into which the expandable pipe 20 is inserted at one end and the branch pipe 30 is inserted at the other end, and an outer peripheral surface of the expandable pipe 20. It includes a coupler 12 fitted into the coupler 12, a fixing ring 13 mounted on the outer peripheral surface of the coupler 12, and a seal ring 14 fitted on the outer peripheral surface of the expandable pipe 20.

In more detail, an expanded pipe 201 is formed to protrude at one end of the expandable pipe 20. In addition, the seal ring 14 includes an inner ring 142 disposed on one side of the expanded tube 201 and an outer ring 141 disposed on the other side of the expanded tube 201. One end of the expandable pipe 20 refers to an end inserted into the connection socket 11, and the expansion portion 201 may be formed at a point spaced apart from the one end.

The expansion portion 201 is formed by an expansion process in which a portion of the expansion pipe 20 is pushed outward in the radial direction by applying a pressing force in the longitudinal direction of the expansion pipe 20 at one end of the expansion pipe 20. It can be.

Figure 3 is a perspective view of a coupler constituting a pipe connection device according to an embodiment of the present invention.

Referring to FIG. 3, the coupler 12 includes a cylindrical coupler body 121, a fixing ring groove 122 recessed with a predetermined depth and width on the outer peripheral surface of the coupler body 121, and the coupler It includes a tapered portion 123 at one end of the body 121 inclined in a direction in which the diameter becomes narrower, and a ring pressing portion 124 extending from the end of the tapered portion 123.

In detail, a plurality of observation grooves 125 may be formed between the other end of the coupler body 121 and the fixing ring groove 122, and the plurality of observation grooves 125 are of the coupler body 121. They may be arranged at predetermined intervals in the circumferential direction. Through the observation groove 125, the user can check whether the fixing ring 13 is in the mounting position.

By the tapered portion 123, the outer diameter of the ring pressing portion 124 is formed to be smaller than the outer diameter of the coupler body 121.

The fixing ring groove 122 may be formed to have a width corresponding to the width of the fixing ring 13, and may be formed to have a depth greater than the thickness of the fixing ring 13.

Figure 4 is a perspective view of a fixing ring constituting a pipe connection device according to an embodiment of the present invention.

Referring to FIG. 4, the fixing ring 13 includes a so-called C-ring type ring body 131 with both ends separated and circular, and a plurality of stoppers formed on the front end of the ring body 131. Includes (132).

The plurality of stoppers 132 may be arranged to be spaced apart in the circumferential direction of the ring body 131. The plurality of stoppers 132 are formed by cutting a portion of the ring body 131 and bending it radially outward.

The fixing ring 131 may be made of stainless steel material having a predetermined elastic force.

In the state before the fixing ring 131 is inserted into the fixing ring groove 122, that is, in a state in which no external force acts, both ends of the fixing ring 131 are in one of the states of contact, spaced apart, or overlap. It can be maintained in either state. And, when the fixing ring 131 is inserted into the fixing ring groove 122, both ends of the fixing ring 13 may be transformed into either a spaced apart state or a contact state.

As another example, the fixing ring 13 may be formed in a simple C-ring form without a stopper 132 and having elastic force. In this structure, the thickness of the fixing ring 13 is designed to be at least equal to or less than the depth of the fixing ring groove 122, so that when the coupler 12 is inserted into the connection socket 11, Prevent the fixing ring 13 from interfering with the inner peripheral surface of the connection socket 11.

And, the maximum length of the fixing ring 13 is when the entire inner peripheral surface of the fixing ring 13 is completely in contact with the bottom of the fixing ring groove 122, and both ends of the fixing ring 13 are connected to each other. It can be formed in any reaching length.

Figure 5 is a cut-away perspective view of a connection socket constituting a pipe connection device according to an embodiment of the present invention.

Referring to FIG. 5, the connection socket 11 may have a cylindrical shape with both ends open.

In detail, an insertion limit protrusion 111 protrudes from the inner peripheral surface of the connection socket 11. The insertion limit jaw 111 may be formed at a point spaced apart from one end and the other end of the connection socket 11 by a predetermined distance. With this structure, the expandable pipe 20 is inserted from one end of the connection socket 11, and the branch pipe 30 is inserted from the other end of the connection socket 11. Additionally, the end of the expandable pipe 20 may be inserted until the outer ring 141 touches one surface of the insertion limit ridge 111, and the end of the branch pipe 30 may be inserted into the insertion limit ridge 111. It can be inserted until it touches the other side of (111).

A stopper locking groove 114 may be recessed on the inner peripheral surface of the connection socket 11. The stopper locking groove 114 may be formed at a predetermined distance from one end of the connection socket 11 toward the insertion limit jaw 111, and extends in the circumferential direction of the connection socket 11. It can form a circular band shape.

A coupler locking protrusion 113 is formed at a point spaced a predetermined distance from the edge of the stopper locking groove 114 toward the insertion limit protrusion 111. The coupler locking protrusion 113 may be formed to be tapered so that its outer diameter decreases toward the insertion limit protrusion 111.

In addition, the inner peripheral surface of the connection socket 11 corresponding to the edge of the coupler locking protrusion 113 and the insertion limit protrusion 111 may be defined as a seal ring seating portion 112. The inner diameter D1 of the connection socket 911 is larger than the diameter D2 of the sealing seat 112, and the diameter D2 of the sealing seat 112 is greater than the inner diameter D3 of the insertion limit jaw 111. ) can be designed to be larger than that. Additionally, the outer diameter of the coupler body 121 may be formed to a size corresponding to the inner diameter D1 of the connection socket 11. Additionally, the outer diameter of the ring pressing portion 124 of the coupler 12 may be formed to a size corresponding to the diameter D2 of the seal ring seating portion 112.

Figure 6 is a cross-sectional view of the pipe connection device according to the present invention showing the state before the coupler is inserted into the connection socket, and Figure 7 is a cross-sectional view of the pipe connection device showing the state in which the coupler is fully inserted into the connection socket.

Referring to FIG. 6, in order to insert and fix the expandable pipe 20 in the connection socket 11, first, the coupler 12 with the fixing ring 13 fitted on the outer peripheral surface of the expandable pipe 20 and The inner ring 142 is sequentially inserted. The expandable pipe 20 is divided into a part with wrinkles and a part without wrinkles. Therefore, the coupler 12 and the inner ring 142 are sequentially inserted from the end of the non-wrinkle portion to the wrinkled side.

With the coupler 12 and the inner ring 142 inserted, the expanded pipe 201 is formed at the end of the expandable pipe 20. Then, the outer ring 141 is inserted and coupled to the outer peripheral surface of the expandable pipe 20 on which the expanded pipe 201 is formed. At this time, there is no need to separately form a receiving groove for accommodating the sealing 14 on the outer peripheral surface of the expandable pipe or the sealing seating portion 112.

In detail, the outer ring 141 is placed on the outside of the expanded tube 201, and the inner ring 142 is placed on the inside of the expanded tube 201.

The expandable pipe 20 to which the sealing 14 is coupled is inserted from one end of the connection socket 11 until the outer ring 141 touches one surface of the insertion limit jaw 111. do.

Then, the coupler 12 is pushed into the connection socket 11. While the fixing ring 13 is inserted into the connection socket 11, the stopper 132 is elastically deformed, so that the outer diameter of the stopper 132 remains the same as the outer diameter of the ring body 131. do.

Referring to FIG. 7, when the tapered portion 123 of the coupler 12 touches the coupler locking protrusion 113, the coupler 12 is no longer inserted into the connection socket 11.

In this state, the fixing ring 13 is located in the stopper locking groove 114, and the stopper 132 is spread in the radial direction by a restoring force and is caught in the stopper locking groove 114.

Additionally, the ring pressurizing part 124 presses the inner ring 142 toward the insertion limiting jaw 111 until the tapered part 123 touches the coupler stopping jaw 113. Then, the inner ring 142 pushes the expanded pipe 201 toward the insertion limit jaw 111, so that the expandable pipe 20 is further inserted into the connection socket 11. In addition, the outer ring 141 comes into closer contact with one surface of the insertion limit jaw 111, thereby increasing the contact area.

Then, the inner ring 142 and the outer ring 141 are compressed, and the cross-sectional shape is transformed from a circular shape to an oval shape. As a result, the surface area of the inner ring 142 and the outer ring 141, which are in close contact with the outer peripheral surface of the expansion pipe 20 and the sealing seat 112, increases, so that the water supplied through the branch pipe 30 Leakage between the outer peripheral surface of the expandable pipe 20 and the inner peripheral surface of the connection socket 11 can be effectively prevented.

In addition, when the stopper 132 is caught in the stopper locking groove 114, even if the expandable pipe 20 is pulled in the direction of separating the expandable pipe 20 from the connection socket 11, the expandable pipe (20) 20) becomes an irreversible state that cannot be eliminated.

In other words, when the expansion pipe 20 is pulled to separate it, the expansion part 201 presses the inner ring 142, and the inner ring 142 presses the ring pressing part of the coupler 12. (124) is pressurized. And, as the ring pressing portion 124 is pressed, the inner edge surface of the fixing ring groove 122 presses the fixing ring 13, and when the fixing ring 13 is pressed, the stopper 132 ) presses the outer edge surface of the stopper locking groove 9114). However, unless a strong external force is applied such that the stopper 132 deviates from the stopper locking groove 114 or the expansion part 201 is bent enough to come into close contact with the outer peripheral surface of the expandable pipe 20, the expandable pipe 20 may be expanded. The pipe 20 is not separated from the connection socket 11.

In this way, with the expandable pipe 20 inserted into the connection socket 11, the coupler 12 is pushed into the connection socket 11, and the stopper 132 is positioned in the stopper locking groove 114. ), and the connection of the new pipe is completed by simply pushing it in until the 'click' sound is heard as it opens due to the restoring force.

Additionally, the user may check whether the stopper 132 is properly caught in the stopper locking groove 114 through the observation groove 125.

Meanwhile, when explaining the assembly process of the fixing ring 13 without a stopper, an external force is applied to the fixing ring 13 to reduce the diameter of the fixing ring 13, so that the outer diameter of the fixing ring 13 is the above. Make sure it is not larger than the outer diameter of the coupler (12). While maintaining this state, the coupler 12 is pushed into the connection socket 11. And, when the rear end of the fixing ring 13 is inserted into the connection socket 11, the force applied to the fixing ring 13 can be removed.

When the coupler 12 is completely inserted into the connection socket 11 and the fixing ring 13 is located in the stopper locking groove 114, the external force acting on the fixing ring 13 is removed. Then, the fixing ring 13 is opened by elastic restoring force and is accommodated in the stopper locking groove 114.

Here, the thickness of the fixing ring 13 must be designed to be larger than the depth of the stopper locking groove 114. If the thickness of the fixing ring 13 is designed to be less than the depth of the stopper locking groove 114, the fixing ring 13 opens and is completely inserted into the stopper locking groove 114, causing the fixing ring 13 to be completely inserted into the stopper locking groove 114. (13) is separated from the fixing ring groove (122). Then, the coupler 12 may spontaneously come off from the connection socket 11.

In order to prevent this phenomenon, the thickness of the fixing ring 13 is designed to be larger than the depth of the stopper locking groove 114. Then, even if the fixing ring 13 is opened due to the restoring force, the outer edge of the fixing ring 13 is received in the stopper locking groove 114, and the inner edge is received in the fixing ring groove 122. , the phenomenon of the coupler 12 being separated from the connection socket 11 does not occur. In other words, it performs the same function as the fixing ring 13 with a stopper structure.

Considering both embodiments of the fixing ring 13, the name of the fixing ring groove 122 can be defined as the coupler-side locking groove (or inner locking groove), and the name of the stopper locking groove 114 It should be noted that the name can be defined as the socket side locking groove (or outer locking groove).

Claims (15)

A connection socket into which an elastic pipe having an expanded pipe is inserted through one end and a branch pipe is inserted through the other end;
A seal ring fitted on the outer peripheral surface of the expansion pipe, including an outer ring fitted on the outside of the expanded pipe, and an inner ring fitted on the inside of the expanded pipe;
In the pipe connection device including an expandable pipe fixing means for preventing the expandable pipe from being separated from the connection socket,
The inner diameter of one end of the connection socket through which the expandable pipe passes is at least larger than the outer diameter of the expanded pipe,
On the inner peripheral surface of the connection socket, an annular insertion limit protrusion that sets an insertion limit of the expandable pipe protrudes at a point spaced a predetermined distance from one end and the other end of the connection socket, respectively,
The newly constructed pipe fixing means,
A coupler inserted into the connection socket while being inserted into the outer peripheral surface of the expandable pipe and having an inner locking groove formed on the outer peripheral surface;
It includes a fixing ring made of a C-ring shape made of an elastic material whose diameter increases when the external force acting in the center direction is removed,
An outer locking groove is formed on the inner peripheral surface of the connection socket,
The fixing ring is,
A ring body at least partially accommodated in the inner locking groove,
The ring body is bent radially outward at the front end, and at least a portion is received in the outer locking groove,
The newly constructed pipe,
A pipe connection device, wherein the coupler with the fixing ring inserted into the inner locking groove and the seal ring are both coupled to the outer peripheral surface and inserted into the connection socket. delete delete According to claim 1,
The pipe connection device is characterized in that the outer locking groove is formed at a point spaced a predetermined distance away from one end of the connection socket. According to claim 4,
A coupler locking protrusion is formed at a point spaced apart from the outer locking groove toward the insertion limit protrusion,
The coupler locking protrusion is a piping connection device characterized in that it is formed to be inclined in a direction closer to the center of the connection socket as it moves toward the insertion limit protrusion. According to claim 5,
The space between the coupler locking jaw and the insertion limiting jaw is defined as a sealing seat,
The inner diameter of the connection socket is larger than the diameter of the seal ring seating portion,
A pipe connection device, characterized in that the diameter of the seal ring seating portion is formed to be larger than the inner diameter of the insertion limit jaw. According to claim 6,
The coupler is,
A coupler body having an outer diameter corresponding to the inner diameter of the connection socket,
A tapered portion extending obliquely in a direction in which the diameter decreases at one end of the coupler body,
It includes a ring pressing portion extending from an end of the tapered portion,
A piping connection device, characterized in that a plurality of observation grooves are formed between the other end of the coupler body and the inner locking groove, spaced apart in the circumferential direction. delete According to claim 7,
The coupler is inserted until the tapered portion touches the coupler locking protrusion,
When the tapered portion touches the coupler locking protrusion, the retaining ring is accommodated in a space formed by the inner locking groove and the outer locking groove. According to clause 9,
A pipe connection device, characterized in that the ring pressurizing part is inserted into the seal ring seating part to pressurize the seal ring. According to claim 1,
The maximum length of the retaining ring is,
A pipe connection device characterized in that the entire inner peripheral surface of the fixing ring is in close contact with the bottom of the inner locking groove and the two ends are in contact with each other. According to claim 11,
The thickness of the fixing ring is,
A piping connection device characterized in that it is designed to be less than or equal to the depth of the inner locking groove. According to claim 12,
The thickness of the fixing ring is,
A piping connection device characterized in that it is designed to be larger than the depth of the outer locking groove. delete delete

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