Pipe Joint Device

Abstract

To provide a pipe joint device which is easy to attach and makes disconnection of a pipe harder as hydraulic pressure is higher.SOLUTION: A pipe joint structure comprises: a connecting unit 1 having a connecting part 11 which is formed hollow so as to surround an accommodation space 111, and which extends so as to increase in thickness in a tapered shape from a small-diameter end part 113 at which a connecting opening 113a suitable for insertion of a pipe is formed to a large-diameter end part 112; fastening means 2 which is movably attached into the accommodation space 111 so as to adjoin the large-diameter end part 112; and fixing means 4 movably attached into the accommodation space 111. The fixing means 4 includes a fixed ring 41 and a plurality of brake structures 42 which are annularly arranged inside the fixed ring 41. On each of the brake structures 42, a projection 421 obliquely extending toward the large-diameter end part 112 side is formed.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a coupling device, and more particularly to a coupling device for pipes. [Background technology]

[0002] When installing pipes in a water supply system or the like, two pipes are connected using a coupling device. To do this, the pipes to be connected are inserted into the connection opening of the coupling device and then heated and pressurized to connect them, or an annular sleeve is attached to the connection opening of the coupling device to secure it in place. However, neither of these methods can be achieved using the coupling device alone, so there is room for improvement.

[0003] In addition, when the water pressure passing through the pipe is too high, the pipe may come off the conventional joint device due to the excessive water pressure, which is also a problem that needs to be solved.

[0004] Moreover, Patent Document 1 describes a joint device that utilizes a spring. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Taiwan Patent Publication No. I227310 Specification Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE PRESENT EMBODIMENTS Accordingly, one object of the present invention is to provide a pipe joint device which is easy to install and which makes it more difficult for the pipe to come loose the higher the water pressure. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a pipe joint device suitable for inserting a pipe, comprising: a connection unit having a hollow connection portion that is formed to surround an accommodation space and that extends in a predetermined extension direction so as to become thicker in a tapered manner from a small diameter end portion, in which a connection opening suitable for inserting the pipe is formed, to a large diameter end portion, and an extension portion that extends from the large diameter end portion of the connection portion along the extension direction; a fastening means movably mounted within the receiving space adjacent the large diameter end; and a fixing means movably attached within the receiving space, the fixing means has a fixing ring and a plurality of brake structures provided in an annular shape inside the fixing ring, each of the brake structures being formed with a protrusion extending obliquely toward the large diameter end of the connection unit; The pipe is inserted into the pipe coupling device so as to pass through the fixing means and the fastening means in order, The fixing means is clamped by the protrusion formed on the brake structure, and when the tightening means is pushed by the water pressure of water that leaks from the end of the pipe inserted into the coupling device and enters the accommodating space, the fixing means is pushed in tandem toward the small diameter end, and the shape of the small diameter end allows the pipe to be tightened even further. Effect of the Invention

[0008] According to the above configuration, the present invention has a protrusion that extends obliquely toward the large diameter end of the connection unit formed in the brake structure of the fixing means, so that the effect of preventing the pipe from coming off the coupling device can be achieved without using heat and pressure or an additional sleeve, and by movably mounting the tightening means in the accommodation space adjacent to the large diameter end, the tightening means can be pushed and moved by the water pressure of water that leaks from the end of the pipe inserted into the coupling device and enters the accommodation space, and when the fixing means is pushed toward the small diameter end in conjunction with the tightening means, the shape of the small diameter end can further tighten and fix the pipe. Also, the present invention can achieve the above effect without using a spring. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing an embodiment of a pipe joint device of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. 2 is a perspective view showing a fixing means in the embodiment. [Figure 4] FIG. [Diagram 5] FIG. 4 is a partial cross-sectional view showing a state in which a pipe is inserted into the connection unit in the embodiment. [Figure 6] FIG. 2 is a partial cross-sectional view showing how the embodiment operates. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 1 and 2, the pipe coupling device 100 of the present invention can connect two pipes 9 (see Figs. 5 and 6) to the pipe 5 by, for example, attaching it to both ends of the pipe 5. In this way, the pipe coupling device 100 of the present invention is provided in, for example, a hollow pipe 5 that is a part of a piping system in order to connect it to the pipe 9, but the pipe 5 is not limited to one that is open at both ends as shown in the figures, and three or more pipe coupling devices 100 of the present invention can be provided in one pipe 5 as necessary, or it is also possible to provide only one pipe coupling device 100 of the present invention.

[0011] As shown in the figure, a pipe joint device 100 of the present invention is suitable for inserting a pipe 9, and includes a connection unit 1 that connects the pipe 9 to a tubular body 5, and a tightening means 2, a waterproof ring 3, and a fixing means 4 that are disposed within the connection unit 1. The connection unit 1 has a connection part 11 for connecting to the pipe 9, and an extension part 12 that extends from a large diameter end part 112 (described later) of the connection part 11 along the extension direction to connect to the tubular body 5.

[0012] The connection part 11 of the connection unit 1 is formed hollow so as to surround the accommodation space 111, and is formed in a shape extending so as to taper in thickness from a small diameter end part 113, where a connection opening 113a suitable for inserting the pipe 9 is formed, to a large diameter end part 112 along a predetermined extension direction (from left to right in FIG. 2 ). The extension part 12 extends further from the large diameter end part 112 of the connection part 11 along the extension direction.

[0013] The fastening means 2 is movably mounted in the accommodation space 111 so as to be adjacent to the large diameter end 112. In this embodiment, the fastening means 2 is an annular gasket, and has a rounded surface portion 21 facing the extension portion 12, and a tapered surface portion 22 formed on the opposite side of the extension portion 12, i.e., facing the connection opening 113a. The outer peripheral edge of the rounded surface portion 21 abuts on the inner peripheral surface of the large diameter end 112, and the inner peripheral edge opposite the outer peripheral edge is configured to be suitable for abutting against the pipe 9 inserted into the connection unit 1, thereby achieving a primary water blocking effect.

[0014] The waterproof ring 3 is accommodated in the accommodation space 111 so as to be adjacent to the connection opening 113a in the small diameter end 113. The outer periphery of the waterproof ring 3 abuts against the inner periphery of the small diameter end 113, and the inner periphery opposite to the outer periphery is configured to be suitable for abutting against the pipe 9 inserted into the connection unit 1, thereby achieving an additional water blocking effect.

[0015] The fixing means 4 is located between the fastening means 2 and the waterproof ring 3, and is movably mounted within the accommodation space 111 so as to be adjacent to the tapered surface portion 22 of the fastening means 2 and be pushed by the fastening means 2.

[0016] 3 and 4, the fixing means 4 includes a fixing ring 41 and a plurality of brake structures 42 provided in an annular shape inside the fixing ring 41. Specifically, in this embodiment, the fixing ring 41 includes a ring body portion 411 formed in an annular shape and a plurality of mounting holes 412 formed in the ring body portion 411 at intervals so as to correspond to the respective protrusions 421 of the brake structures 42 described below, and each of the brake structures 42 is attached to the fixing ring 41 so as to be fitted into one of the mounting holes 412.

[0017] The fixing ring 41 has two shoulders 413 formed in each mounting hole 412, and each brake structure 42 has a ring body 411 inserted through a corresponding mounting hole 412, and a plurality of protrusions 421 are formed at the end of the ring body 411. Furthermore, each brake structure 42 has two abutment tabs 422 extending from both ends along the extension direction, and each abutment tab 422 is fitted into the corresponding mounting hole 412 so as to be able to abut against the shoulders 413 formed in the corresponding mounting hole 412. All of the plurality of protrusions 421 extend obliquely toward the large diameter end 112 of the connection unit 1. In this embodiment, the plurality of protrusions 421 are configured in a sawtooth shape with teeth directed toward the large diameter end 112.

[0018] The usage of the pipe coupling device 100 of this embodiment will be described below with reference to Figures 5 and 6. First, as shown in Figure 5, when the pipe 9 is inserted into the connection unit 1 of the pipe coupling device 100 from the connection opening 113a, the pipe 9 passes through the waterproof ring 3, the fixing means 4, and the tightening means 2, and the tip of the pipe 9 is positioned in the extension part 12, and is sandwiched by the protrusion 421 formed on the brake structure 42 of the fixing means 4, and the pipe 9 communicates with the tube body 5 (see Figure 1) at the tip of the extension part 12. Therefore, the waterproof ring 3 abutting against the pipe 9 moves to the right side in the figure together with the pipe 9 due to frictional force and becomes adjacent to the fixing means 4, pushing the fixing means 4 toward the large diameter end 112 of the connection unit 1.

[0019] Before the pipe 9 is inserted, the brake structure 42 of the fixing means 4 has the abutment tab 422 abutting against the shoulder 413 of the mounting hole 412, as shown in Figure 2, for example. However, after the pipe 9 is inserted as shown in Figure 5, while the inserted pipe 9 abuts against the protrusion 421 and the fixing means 4 is positioned on the large diameter end 112 side of the connection unit 1, there is play between the brake structure 42 and the connection unit 1, so that the brake structure 42 is pushed slightly outward (towards the connection unit 1) from the mounting hole 412 and the abutment tab 422 of each brake structure 42 moves away from the shoulder 413 of the mounting hole 412.

[0020] Furthermore, when the pipe 9 is pulled out of the connection opening 113a (to the left in the figure) from the state in which the tip of the pipe 9 is inserted into the extension portion 12 as shown in Figure 5, the protrusion 421 extends obliquely toward the large diameter end 112 of the connection unit 1, so that the frictional force of contact with the pipe 9 causes the protrusion 421 to move together with the pipe 9 to the left in the figure, that is, toward the small diameter end 113 of the connection unit 1 as shown in Figure 6. However, since the taper-shaped aperture of the connection unit 1 becomes narrower as it approaches the small diameter end 113, there is no play between the brake structure 42 and the connection unit 1, and the brake structure 42 in contact with the connection unit 1 is pressed against the pipe 9 until the abutment tab 422 abuts against the shoulder 413 of the mounting hole 412, so that the pipe 9 is tightened more tightly and the pipe 9 can be fixed with stronger frictional force.

[0021] Furthermore, for example, even if the water pressure from the pipe 9 is high and water enters the accommodating space 111 through the gap between the extension part 12 and the pipe 9 from the end of the pipe 9 inserted into the coupling device 100, when the rounded surface part 21 of the fastening means 2 is pushed to the left in Figures 5 and 6 by the water pressure of the water that has entered the accommodating space 111, the moved fastening means 2 will hit the right end of the fixing ring 41 of the fixing means 4 and push the fixing means 4 to the left in the figure, i.e., toward the small diameter end 113 of the connection unit 1, which has a smaller diameter. In other words, the fixing means 4 will be pushed in conjunction with the fastening means 4 toward the small diameter end 113, and the brake structure 42 of the fixing means 4 will be pressed tightly against the pipe 9 side due to the shape of the connection unit 1, whose diameter is narrowing, so that the pipe 9 is fixed with a stronger frictional force and the water blocking effect can be enhanced.

[0022] Furthermore, even if the water that has entered the storage space 111 further enters between the fixing means 4 and the waterproof ring 3, the water will press the waterproof ring 3 against the left side in Figures 5 and 6, i.e., the small diameter end 113, thereby strengthening the blocking effect of the waterproof ring 3 arranged at the small diameter end 113.

[0023] To sum up, in the pipe joint device 100 of the present invention, the protrusion 421 formed on the brake structure 42 of the fixing means 4 is formed in a shape that extends obliquely toward the large diameter end 112 of the connection unit 1, so that the pipe 9 is not hindered from being inserted into the extension 12 from the connection opening 113a, and when the pipe 9 inserted into the extension 12 is pulled toward the connection opening 113a, the pipe 9 can be tightened and fixed by the frictional force that becomes stronger as it is pulled, and even if water from the end opening inserted into the extension 12 of the pipe 9 enters the accommodation space 111 through the gap between the extension 12 and the pipe 9, the double blocking effect of the tightening means 2 and the waterproof ring 3 can prevent the water from leaking from the connection opening 113a. Therefore, the object of the present application can be reliably achieved.

[0024] Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible without departing from the gist of the present invention. [Explanation of symbols]

[0025] 100 Pipe Joint Device 1 Connection unit 11 Connection 111 Containment Space 112 Large diameter end 113 Small diameter end 113a Connection opening 12 Stretching section 2 Fastening means 21 Round part 22 Tapered surface 3 Waterproof ring 4 Fixing means 41 Fixing ring 411 Ring body 412 Mounting hole 413 Shoulder 42 Brake structure 421 Protrusion 422 Contact tab 9. Pipes

Claims

[Claim 1] A pipe coupling device suitable for inserting a pipe, comprising: a connection unit having a hollow connection portion that is formed to surround an accommodation space and that extends in a predetermined extension direction so as to become thicker in a tapered manner from a small diameter end portion, in which a connection opening suitable for inserting the pipe is formed, to a large diameter end portion, and an extension portion that extends from the large diameter end portion of the connection portion along the extension direction; a fastening means movably mounted within the receiving space adjacent the large diameter end; A fixing means movably mounted within the receiving space; a waterproof ring movably accommodated in the accommodation space so as to be adjacent to the small diameter end, the fixing means has a fixing ring and a plurality of brake structures provided in an annular shape inside the fixing ring, each of the brake structures being formed with a protrusion extending obliquely toward the large diameter end of the connection unit; The pipe is inserted into the pipe coupling device so as to pass through the fixing means and the fastening means in order, The fixing means is sandwiched by the protrusion formed on the brake structure, and when the fastening means is pushed by the water pressure of water leaking from the end of the pipe inserted into the coupling device and entering the accommodation space, the fixing means is pushed in conjunction with the water pressure towards the small diameter end, and the pipe can be further tightly fastened due to the shape of the small diameter end. Furthermore, the fastening means is a gasket and is formed to have a tapered surface portion formed on the opposite side of the extension portion and capable of adjoining the fixing means, a fixing ring having a ring body, a plurality of mounting holes formed in the ring body at intervals to correspond to the protrusions of each of the brake structures, and two shoulders formed in each of the mounting holes, each of the brake structures being inserted through the ring body via one of the corresponding mounting holes, and a plurality of the protrusions being formed at the tip of the ring body; and each of the brake structures being formed with two abutment tabs extending from both ends along the extension direction, each of the brake structures being adapted to abut against the shoulders formed in the corresponding mounting holes.

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