KR20230100265A - Apparatus for connecting pipes - Google Patents

Abstract

A pipe joint device according to an embodiment of the present invention includes a joint pipe into which a pipe for connection is inserted; and a pipe fixing member coupled to an end of the joint pipe and fixing the pipe for connection to the joint pipe, wherein the pipe fixing member includes: a seal ring fitted to an outer circumferential surface of the pipe for connection; A pressure ring fitted to the outer circumference of the pipe for the connection and in close contact with the sealing ring; A tightening nut fitted to the outer circumferential surface of the pipe for the connection; A stopper coupled to an end of the tightening nut; a tightening wheel coupled to an outer circumferential surface of the tightening nut; a clamp connected to an end of the joint and covering the tightening wheel; and a worm bolt coupled to the clamp in a direction orthogonal to the axial direction of the clamp and in contact with an outer circumferential surface of the tightening wheel.

Description

Pipe fitting {Apparatus for connecting pipes}

The present invention relates to a pipe fitting device.

In general, in order to connect a plurality of pipes installed in water and sewage, firefighting, gas, electricity, and various industrial plants, ends of the pipes to be connected are welded to each other, or a separate joint device is used.

In the prior art filed by the applicant of the present invention below, information about a pipe joint member connecting two pipes is disclosed.

The pipe fitting device disclosed in the prior art has the following problems.

First, as the worm bolt rotates, the tightening nut rotates and moves in the axial direction of the joint pipe, so that the contact point between the thread of the worm bolt and the gear teeth of the tightening nut changes.

In detail, the rotational force acting on the surface of the gear teeth of the tightening nut by the rotation of the worm bolt acts in the tangential direction of the tightening nut. And, the point of application of the rotational force acting on the surface of the gear teeth of the tightening nut is changed in the longitudinal direction of the gear teeth of the tightening nut.

Here, as the operating point of the rotational force is changed, the moving direction of the tightening nut and the axis of the joint pipe are not parallel and misaligned, resulting in damage to the screw thread formed on the outer circumferential surface of the tightening nut or damage to the gear teeth of the tightening nut. There is a disadvantage.

For example, although it is most ideal that the point of action of the rotational force acting in the tangential direction acts at the center of the teeth of the tightening nut, the more the point of action moves toward the longitudinal end of the teeth of the tightening nut, the more the tightening nut moves along the joint. A moment is generated that causes the tube to move in a direction that is out of alignment with the central axis of the tube. Due to this moment, there is a disadvantage that may cause breakage of not only the tightening nut, but also a counterpart part geared or screwed to the tightening nut.

Second, since the washer member must be separately interposed to prevent the stopper from rotating as one body with the tightening nut, there is a disadvantage in that manufacturing cost increases.

Third, when the wombold is rotated, the tightening nut rotates and is inserted in the axial direction of the fitting pipe. In this process, the washer in close contact with the end of the tightening nut and the stopper in close contact with the washer rotate together with the tightening nut by frictional force, resulting in a problem in that the stopper scratches the outer circumferential surface of the connecting pipe.

Fourth, since the worm bolt accommodating portion is integrally formed with the joint pipe, it is impossible to change the position of the worm bolt accommodating portion formed at both ends of the joint pipe. For example, when the worm bolt receiving parts formed at both ends of the joint pipe are formed on the same line in the longitudinal direction of the joint pipe, the location of the worm bolt is determined for convenience in the process of connecting the pipe to one end of the joint pipe. The position of the worm bolt formed on the ground and at the other end of the joint is also automatically determined.

However, due to the automatically determined position of the worm bolt at the other end of the fitting pipe, it may be very inconvenient to rotate the worm bolt when connecting the pipe to the other end of the fitting pipe due to a nearby work environment. That is, it may be very inconvenient to access the electric drill to rotate the worm bolt formed at the other end of the fitting pipe due to the working environment near the other end of the fitting pipe. That is, since it is impossible to change the location of the worm bolt, the work must be performed at the expense of inconvenience, which may reduce work convenience.

Korean Patent Publication No. 2021-0045130 (April 26, 2021)

The present invention is proposed to improve the above problems or disadvantages.

A pipe joint device according to an embodiment of the present invention for achieving the above object includes a joint pipe into which a pipe for connection is inserted; and a pipe fixing member coupled to an end of the joint pipe and fixing the pipe for connection to the joint pipe, wherein the pipe fixing member includes: a seal ring fitted to an outer circumferential surface of the pipe for connection; A pressure ring fitted to the outer circumference of the pipe for the connection and in close contact with the sealing ring; A tightening nut fitted to the outer circumferential surface of the pipe for the connection; A stopper coupled to an end of the tightening nut; a tightening wheel coupled to an outer circumferential surface of the tightening nut; a clamp connected to an end of the joint and covering the tightening wheel; and a worm bolt coupled to the clamp in a direction orthogonal to the axial direction of the clamp and in contact with an outer circumferential surface of the tightening wheel.

The clamp is characterized in that it is separable from the joint pipe.

The clamp is characterized in that it is divided into at least two or more parts, and the two or more parts are connected to surround the outer circumferential surface of the fitting pipe.

The screw thread formed on the inner circumferential surface of the tightening wheel is engaged with the screw thread formed on the outer circumferential surface of the tightening nut, and as the tightening wheel rotates, the tightening nut only linearly moves along the pipe for the connection.

The screw thread of the worm bolt is engaged with the worm gear formed on the outer circumferential surface of the tightening wheel, and as the worm bolt rotates, the tightening wheel rotates only on the outer circumferential surface of the tightening nut.

The contact point of the worm bolt and the tightening wheel is characterized in that it forms a single circle along the outer circumferential surface of the tightening wheel.

The stopper includes a stopper ring inserted into one end of the tightening nut and a plurality of stopper teeth extending from the stopper ring in an axial direction of the pipe to be connected.

An inclined surface is formed on the inner circumferential surface of the pressure ring, and as the tightening nut moves in a direction closer to the fitting pipe, the plurality of stopper teeth are elastically deformed toward the outer circumferential surface of the pipe to be connected along the inclined surface, so that the pipe to be connected It is characterized by pressing the outer circumferential surface of.

A stopper fixing protrusion protrudes from an outer circumferential surface of one end of the tightening nut, and a hooking portion that is caught on the stopper fixing protrusion is bent at the stopper ring.

The stopper is characterized in that it is made of a single ring shape or made of at least two parts.

The tightening nut surrounds the pipe to be connected, includes a circular nut body to which the tightening wheel is screwed to an outer circumferential surface, and a stopper fixing slot into which the stopper is inserted is formed at one end of the nut body .

The tightening nut further includes a plurality of fastening flanges extending in a radial direction of the nut body from the other end of the nut body, and a pair of fitting holes are formed in the fastening flange.

At one end of the clamp, a joint pipe locking jaw extends toward the center of the clamp, and at an end of the joint pipe, a clamp locking jaw engaging the joint pipe locking jaw protrudes in a radial direction of the joint pipe. .

The other end of the clamp is formed with a plurality of fastening nut fastening parts coupled to each other with the fastening flange, and each of the plurality of fastening nut fastening parts includes a pair of fitting protrusions inserted into the pair of fitting holes.

A plurality of locking protrusions protrude from the outer circumferential surface of the other end of the tightening nut, and a plurality of locking grooves into which the plurality of locking protrusions are inserted are formed on the inner circumferential surface of the other end of the clamp.

Each of the plurality of locking projections is located between the pair of fitting holes, and each of the plurality of locking grooves is characterized in that formed between the pair of fitting projections.

It is characterized in that the seal ring and the pressure ring are made of a single body.

According to the pipe joint device according to the embodiment of the present invention constituting the above configuration has the following effects.

First, since the tightening wheel structure is added between the worm bolt and the tightening nut, the tightening nut moves only in the axial direction of the joint regardless of the rotation of the worm bolt, so that the tightening nut and the stopper rotate as one body, There is an advantage in that the phenomenon of damaging the surface is prevented.

Second, since the tightening nut moves only in the axial direction of the fitting, there is an advantage in that there is no need to add a separate part such as a washer between the tightening nut and the stopper.

Third, since the tightening wheel engaged with the worm bolt only rotates while being gear-coupled with the worm bolt and does not move in a straight line in the axial direction of the joint, the rotational force acting by the rotation of the worm bolt is always at the center of the gear surface of the tightening wheel. works on As a result, there is an advantage that no moment is generated that hinders linear movement of the tightening nut.

Fourth, as the tightening nut is inserted into the fitting pipe, the fitting protrusion protruding from the clamp is inserted into the fitting hole formed in the tightening nut, preventing the clamp from spreading in the radial direction of the fitting pipe due to the increase in pressure inside the connecting pipe. There are advantages to being Furthermore, since the clamp is prevented from spreading in the radial direction of the joint pipe, there is an advantage in preventing the thread of the worm bolt from being separated from the gear teeth of the tightening wheel in the radial direction of the tightening wheel.

Fifth, the locking protrusion formed on the tightening nut is inserted into the locking groove formed on the clamp, thereby preventing the clamp from spinning idle.

Sixth, since the stopper is inserted into the stopper fixing slot formed in the tightening nut and hooked on the stopper fixing protrusion, the stopper also falls out together when the tightening nut is removed from the fitting pipe, so that the separation of the connecting pipe can be easily performed.

Seventh, since the clamp is not integrally formed with the joint pipe but is provided as an independent part, the operator can freely select the position of the worm bolt according to the working environment, thereby improving work convenience.

1 is a perspective view of a piping device according to an embodiment of the present invention;
2 is an exploded perspective view of the piping device;
Figure 3 is a longitudinal cross-sectional view of the fitting device taken along 3-3 in Figure 1;
Fig. 4 is a front perspective view of a clamp constituting a pipe fixing member;
5 is a rear perspective view of the clamp;
6 is a front perspective view of a tightening wheel constituting a tube fixing member;
Figure 7 is a front perspective view showing a coupled state of the tightening nut and the stopper constituting the pipe fixing member.
Figure 8 is a rear perspective view showing a coupled state of the tightening nut and the stopper.
Fig. 9 is a front perspective view of a stopper constituting a pipe fixing member;
Figure 10 is a cross-sectional view showing the operation of the tube fixing member.
Figure 11 is a perspective view showing the state of operation of the pipe fixing member.

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

1 is a perspective view of a pipe fitting device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the pipe fitting device, and FIG. 3 is a longitudinal sectional view of the pipe fitting device cut along 3-3 in FIG.

Referring to FIGS. 1 to 3 , a pipe joint device 10 according to an embodiment of the present invention includes a joint pipe 11 and pipe fixing members provided at both ends of the joint pipe 11 . The main pipe (P) may be connected to one end of the joint pipe 11 by the pipe fixing member, and the auxiliary pipe (C) may be connected to the other end.

In detail, the joint pipe 11 may be formed in a straight line shape, an L shape, or a T shape, and the pipe fixing member is provided in a symmetrical shape to ends of the joint pipe 11 .

Here, a structure in which an end into which pipes for connection are inserted is formed only at one end of the joint pipe 11 is also possible. For example, a structure in which one end of the fitting pipe is made of one body with the pipe for connection and the pipe fixing member is provided only at the other end of the fitting pipe 11 into which the other pipe for connection is inserted is also possible.

Hereinafter, the pipe fixing member inserted into the other end of the fitting pipe 11, that is, the pipe fixing member for connecting the auxiliary pipe (C) and its function will be described, and the pipe fixing member inserted into one end and its function Avoid redundant explanations. Furthermore, in FIG. 3, a cross-sectional view is shown in which pipe fixing members are provided at both ends of the joint pipe 11, but in the exploded perspective view of FIG. 2, the pipe fixing member for connecting the main pipe (P) is omitted to simplify the drawing. make it clear that

A clamp locking jaw 111 may be formed at one or both ends of the joint pipe 11 provided with the pipe fixing member. The clamp locking protrusion 111 may extend from an end of the joint pipe 11 in a radial direction of the joint pipe 11 .

The pipe fixing member includes a clamp 12, a tightening wheel 13, a tightening nut 914), a stopper 15, a pressure ring 16, a seal ring 17, and a worm bolt 18. include It is also possible that the pressure ring 16 and the seal ring 17 are made of a single body.

The clamp 12 is caught on the clamp locking jaw 111 of the joint pipe 11 and is coupled to an end of the joint pipe 11 .

A worm bolt accommodating portion 121 (see FIG. 4) is formed on an outer circumferential surface of the clamp 12, and the worm bolt 18 is accommodated in the worm bolt accommodating portion 121. The central axis of the worm bolt 18 is orthogonal to the central axis of the clamp 12 .

The tightening wheel 13 is rotatably provided on the inner circumferential surface of the clamp 12, and the tightening wheel 13 and the worm bolt 18 are gear-coupled.

The tightening nut 14 is inserted inside the tightening wheel 13. The tightening nut 14 and the tightening wheel 13 are screwed together, and the tightening nut 14 moves in the axial direction of the joint pipe 11 as the tightening wheel 13 rotates. The axial direction of the fitting pipe 11 may be understood as a direction in which the tightening nut 14 is inserted into the fitting pipe 11 or a direction in which the fitting pipe 11 is pulled out.

The stopper 15 is coupled to the end of the tightening nut 14 and is movable with the tightening nut 14 as one body. The end of the stopper 15 is elastically deformed in the direction of pressing the outer circumferential surface of the main pipe (P) or the auxiliary pipe (C) by the pressure ring (16).

The sealing ring 17 is pressed in the axial direction of the fitting pipe 11 by the pressure ring 16, and the shape is deformed in the radial direction of the fitting pipe 11, so that the surface of the fitting pipe 11 adheres strongly to

Hereinafter, each of the components constituting the pipe fixing member will be described in detail with reference to the drawings.

4 is a front perspective view of a clamp constituting the pipe fixing member, and FIG. 5 is a rear perspective view of the clamp.

Referring to FIGS. 4 and 5 , in the clamp 12 according to the embodiment of the present invention, a semicircular first portion 12a and a second portion 12b may be combined to form one circular ring. Alternatively, a clamp 12 structure composed of three or more parts and having two or more hinge points is also possible.

In detail, one of the first part 12a and the second part 12b may be provided with a bracket 122 having a hook hole, and the other may be provided with a hook 123 inserted into the hook hole. there is. The bracket 122 and the hook 123 may be defined as a clamp connection part.

A joint pipe locking jaw 125 is formed on the front or front end of the clamp 12. The joint pipe locking jaw 125 extends a predetermined length toward the center of the clamp 12 and is caught on the clamp locking shoulder 111 of the joint pipe 11 . The clamp 12 is freely rotatable in a state in which it is coupled to the end of the joint pipe 11 .

A tightening wheel accommodating groove 124 is formed on the inner circumferential surface of the clamp 12, and the tightening wheel 13 is rotatably mounted in the tightening wheel accommodating groove 124.

A worm bolt accommodating portion 121 is formed on an outer circumferential surface of the clamp 12 , and the worm bolt 18 is accommodated in the worm bolt accommodating portion 121 . In a state where the tightening wheel 13 is accommodated in the tightening wheel receiving groove 124, when the worm bolt 18 is rotated and inserted into the worm bolt receiving portion 121, the worm bolt 18 and the tightening The wheels 13 are engaged and rotate together. The rotational axis of the worm bolt 18 and the rotational axis of the tightening wheel 13 are orthogonal to each other. At one or both ends of the worm bolt 18, a groove into which a general slotted screwdriver, Phillips screwdriver, or hex wrench driver can be inserted may be formed.

A plurality of fastening nut fastening parts are formed on the rear surface of the clamp 12, and each of the plurality of fastening nut fastening parts may consist of a pair of fitting protrusions 126. The plurality of tightening nut fastening parts may be formed spaced apart at 90 degree intervals in the circumferential direction of the clamp 12 .

An engaging groove 127 is formed on the inner circumference of the clamp 12 between the pair of fitting protrusions 126 .

The plurality of tightening nut fastening parts may be formed at the center of the first part 12a and the second part 12b, respectively, and at both ends of the first part 12a and the second part 12b. each can be formed.

Each of the tightening nut fastening parts formed at both ends of the first part 12a and the second part 12b is formed between a fitting protrusion formed at an end of the first part 12a and the second part 12b. It includes a fitting protrusion formed at the end. When the circular clamp 12 is completed by bringing the ends of the first part 12a and the second part 12b into close contact, the fitting protrusion formed at the end of the first part 12a and the second part 12b ) An engaging groove 127 is formed between the fitting protrusions formed at the end of the.

6 is a front perspective view of a tightening wheel constituting the tube fixing member.

Referring to Figure 6, the tightening wheel 13 may be made of a circular ring shape.

In detail, a worm gear 131 is formed on the outer circumferential surface of the tightening wheel 13, and the thread of the worm bolt 18 is engaged with the worm gear 131.

A thread 132 is formed on the inner circumferential surface of the tightening wheel 13, and the thread 132 engages with a thread 142 of the tightening nut 14 to be described later.

A seating end 133 is stepped at the front end of the inner circumferential surface of the tightening wheel 13 . The clamp holding jaw 111 of the fitting pipe 11 is seated on the seating end 133 (see FIG. 3).

Figure 7 is a front perspective view showing a coupled state of the tightening nut and the stopper constituting the pipe fixing member, Figure 8 is a rear perspective view showing a coupled state of the tightening nut and the stopper.

7 and 8, the tightening nut 14 includes a nut body 141.

In detail, the nut body 141 is formed in a circular ring shape, and a screw thread 142 is formed on an outer circumferential surface of the nut body 141 to engage with the screw thread 132 of the tightening wheel 13.

A stopper fixing slot 145 is formed at the front end of the nut body 141 . The stopper fixing slot 145 has a radial width and an axial depth corresponding to the thickness of the stopper 15 . The depth in the axial direction means the length of the stopper fixing slot 145 depressed from the front end of the nut body 141 toward the rear end.

A plurality of stopper locking jaws 147 are formed on the outer circumferential surface of the front end of the nut body 141 . A stopper fixing protrusion 146 protrudes from the outer circumferential surface of the nut body 141 corresponding to the center of the stopper locking jaw 147. By the stopper fixing protrusion 146, the stopper locking jaw 147 may be formed in a "c" shape.

The tightening nut 14 further includes a plurality of fastening flanges 143.

The fastening flange 143 is a part coupled to the fastening nut fastening part, and may be provided in the same number as the fastening nut fastening part.

The fastening flange 143 extends a predetermined length in a radial direction of the nut body 141 and has a predetermined width in a circumferential direction. The fastening flange 143 is formed with a fitting hole 1431 into which the fitting protrusion 126 constituting the tightening nut fastening part is inserted. The fitting holes 1431 are formed in a number corresponding to the number of the fitting protrusions 126 and are spaced apart in the circumferential direction of the nut body 141 .

When the fitting protrusion 126 is inserted into the fitting hole 1431, even if an external force acts in the radial direction of the auxiliary pipe (C) due to an increase in pressure inside the auxiliary pipe (C), the clamp 12 is opened. phenomena can be prevented.

The tightening nut 14 further includes a locking protrusion 144. The locking protrusion 144 protrudes from the outer circumferential surface of the nut body 141 corresponding to the center of the fastening flange 143 . When the locking protrusion 144 is inserted into the locking groove 127 of the flange 12, the clamp 12 rotates the tightening wheel 13 by the reaction force generated when the worm bolt 18 is rotated. The phenomenon of idle rotation in the opposite direction to the rotational direction is prevented, and the tightening nut 14 can only perform linear motion in the axial direction of the joint pipe 11 when the tightening wheel 13 rotates.

Fig. 9 is a front perspective view of a stopper constituting the pipe fixing member.

Referring to FIG. 9 , the stopper 15 includes a stopper ring 151 and a plurality of stopper teeth extending a predetermined length from the front end of the stopper ring 151 .

The stopper 15 may be formed in a single ring shape, or may include a first stopper portion and a second stopper portion having a semicircular shape that are symmetrical to each other.

A plurality of hooking parts 153 protrude from the stopper ring 151 , and the plurality of hooking parts 153 may protrude in a “c” shape in the axial direction of the stopper 15 .

When the stopper 15 is composed of a semicircular first stopper part and a second stopper part, the hooking part 153 is formed at both ends where the central part of each of the first and second stopper parts and the first and second stopper parts meet. ) can be formed, respectively.

An “L” shaped bent portion is formed at both ends of the first and second stopper portions, and when both ends of the first and second stopper portions come into contact with each other, the “c” shaped hanging portion 153 is completed.

The plurality of stopper teeth 152 extend in the axial direction of the stopper ring 151 from the front end of the stopper ring 151 and are elastically deformable in the radial direction of the stopper ring 151 . To this end, the stopper 15 may be made of stainless steel capable of elastic deformation.

When the stopper 15 is inserted into the stopper fixing slot 145 of the tightening nut 14, the plurality of locking parts 153 are seated on the stopper locking jaw 147. Then, the hooking part 153 is placed in a form surrounding the stopper fixing protrusion 146, so that the hooking part 153 is caught on the stopper fixing protrusion 146.

Due to this coupling structure, a phenomenon in which the stopper 15 rotates in the circumferential direction of the tightening nut 14 inside the stopper fixing slot 145 is prevented. In addition, when the tightening nut 14 moves in the axial direction of the tightening nut 14, the stopper 15 also moves together with the tightening nut 14.

Figure 10 is a cross-sectional view showing the operation of the tube fixing member, Figure 11 is a perspective view showing the operation of the tube fixing member.

10 and 11, in order to connect the pipe to one end of the fitting pipe 11, the sealing ring 17 and the pressure ring 16 are sequentially inserted.

And, after screwing the tightening wheel 13 to the outer circumferential surface of the tightening nut 14, the stopper 15 is inserted into the front end of the tightening nut 14. In addition, after the tightening wheel 13, the tightening nut 14, and the stopper 15 combination body is in close contact with the end of the joint pipe 11, the clamp 12 to which the worm bolt 18 is coupled is The outer circumferential surface of the fitting pipe 11 and the end of the tightening nut 14 are coupled so as to be in close contact with each other. Here, in the case of the clamp 12 composed of the first part 12a and the second part 12b, the first part 12a in which the worm bolt accommodating part 121 is formed is firstly applied to the outer circumferential surface of the joint pipe 11 Then, the second part (12b) is brought into close contact with the outer circumferential surface of the joint pipe (11).

At this time, one end of the first part 12a and the second part 12b are connected by the coupling of the bracket 122 and the hook 123, and the first part 12a is connected to the joint pipe 11 In a state of being in close contact with the outer circumferential surface of ), the second part 12b is rotated so that the hook 123 formed on the other end of the second part 12b is coupled to the bracket 122 formed on the first part 12a. can be made

In a state in which the clamp 12 is completely coupled to the end of the joint pipe 11, the operator uses an electric drill or a manual drill to rotate the worm bolt 18 in one direction around the first axis L1. rotate to Then, the tightening wheel 13 rotates in one direction about the second axis L2, and at this time, the contact point 101 between the worm bolt 18 and the tightening wheel 13 is the tightening wheel 13 ) is formed in the center of the worm gear 131. Also, since the contact point 101 does not move in the axial direction of the tightening wheel 13, a band is formed along the circumferential surface of the tightening wheel 13.

In addition, as the tightening wheel 13 rotates in one direction, the combination of the tightening nut 14 and the stopper 14 screwed with the tightening wheel 13 moves in the axial direction of the joint pipe 11 , that is, it moves along the second axis (L2). That is, the tightening nut 14 linearly moves along the second axis L2 in a direction in which the stopper 14 approaches the pressure ring 16 .

In addition, an inclined surface 161 is formed on the inner circumferential surface of the pressure ring 16 . When the tightening nut 14 is further inserted into the clamp 12 while the stopper teeth 152 are in contact with the inclined surface 161, the stopper teeth 152 of the stoppers 15 are elastically deformed to Adhere to the outer circumferential surface of the pipe (P or C) to be connected. Further, in a state in which the stopper tooth 152 bites the outer circumferential surface of the pipe (P or C), the pipe (P or C) is not separated from the joint pipe (11).

According to this fastening structure, when the worm bolt 18 rotates, the tightening nut 14 and the stopper 15 only move linearly in the axial direction, so that the pipe fitting device disclosed in the prior art It has the effect of solving the problem of

In addition, as the tightening nut 14 linearly moves along the second axis L2 in a direction approaching the joint pipe 11, the fitting protrusion 126 protruding from the rear end of the clamp 12 Since it is inserted into the fitting hole 1431 formed in the fastening flange 143 of the fastening nut 14, the clamp 12 and the fastening nut 14 are firmly coupled to each other. In addition, the locking protrusion 144 of the tightening nut 14 is inserted into the locking groove 127 formed between the pair of fitting protrusions 126, so that the clamp 12 and the tightening nut 14 is prevented from spinning in opposite directions.

Claims (17)

A fitting into which a tube for connection is inserted; and
It is coupled to the end of the fitting pipe and includes a pipe fixing member for fixing the pipe for the connection to the fitting pipe,
The pipe fixing member,
A seal ring fitted to the outer circumferential surface of the pipe for the connection;
A pressure ring fitted to the outer circumference of the pipe for the connection and in close contact with the sealing ring;
A tightening nut fitted to the outer circumferential surface of the pipe for the connection;
A stopper coupled to an end of the tightening nut;
a tightening wheel coupled to an outer circumferential surface of the tightening nut;
a clamp connected to an end of the joint and covering the tightening wheel; and
Coupled to the clamp in a direction orthogonal to the axial direction of the clamp, pipe joint device comprising a worm bolt in contact with the outer circumferential surface of the tightening wheel. According to claim 1,
The pipe joint device, characterized in that the clamp is detachable from the joint pipe. According to claim 2,
The clamp is divided into at least two or more parts, and the two or more parts are connected to surround the outer circumferential surface of the fitting pipe. According to claim 1,
The screw thread formed on the inner circumferential surface of the tightening wheel is engaged with the screw thread formed on the outer circumferential surface of the tightening nut,
As the tightening wheel rotates, the tightening nut only linearly moves along the pipe for the connection. According to claim 4,
The thread of the worm bolt is engaged with the worm gear formed on the outer circumferential surface of the tightening wheel,
As the worm bolt rotates, the tightening wheel rotates only on the outer circumferential surface of the tightening nut. According to claim 5,
The joint device, characterized in that the contact point of the worm bolt and the tightening wheel forms a single circle along the outer circumferential surface of the tightening wheel. According to claim 1,
The stopper,
A stopper ring inserted into one end of the tightening nut;
A pipe fitting device comprising a plurality of stopper teeth extending from the stopper ring in an axial direction of the pipe to be connected. According to claim 7,
An inclined surface is formed on the inner circumferential surface of the pressure ring,
As the tightening nut moves in a direction approaching the joint pipe, the plurality of stopper teeth are elastically deformed toward the outer circumferential surface of the pipe to be connected along the inclined surface, and pressurize the outer circumferential surface of the pipe to be connected. Device. According to claim 7,
A stopper fixing protrusion protrudes from the outer circumferential surface of one end of the tightening nut,
The stopper ring is a pipe joint device, characterized in that the stopper ring is formed by bending the hooking portion caught on the stopper fixing projection. According to claim 7,
The stopper is a pipe fitting device, characterized in that consisting of a single ring shape, or at least two parts. According to claim 7,
The tightening nut,
It surrounds the pipe to be connected and includes a circular nut body to which the tightening wheel is screwed to an outer circumferential surface,
A pipe joint device, characterized in that a stopper fixing slot into which the stopper is inserted is formed at one end of the nut body. According to claim 7,
The tightening nut,
Further comprising a plurality of fastening flanges extending in the radial direction of the nut body from the other end of the nut body,
A pipe fitting device, characterized in that a pair of fitting holes are formed in the fastening flange. According to claim 12,
At one end of the clamp, a joint locking jaw extends toward the center of the clamp,
The pipe joint device, characterized in that the end of the fitting pipe, the clamp engaging jaw protrudes in the radial direction of the fitting pipe engaging the joint pipe engaging jaw. According to claim 13,
The other end of the clamp is formed with a plurality of fastening nut fastening parts mutually coupled with the fastening flange,
Each of the plurality of tightening nut fastening parts,
A pipe fitting device comprising a pair of fitting protrusions inserted into the pair of fitting holes. 15. The method of claim 14,
A plurality of locking protrusions protrude from the outer circumferential surface of the other end of the tightening nut,
A pipe joint device, characterized in that a plurality of locking grooves into which the plurality of locking protrusions are inserted are formed on the inner circumferential surface of the other end of the clamp. According to claim 15,
Each of the plurality of locking protrusions is located between the pair of fitting holes,
Each of the plurality of locking grooves is a pipe joint device, characterized in that formed between the pair of fitting protrusions. According to claim 1,
The pipe joint device, characterized in that the seal ring and the pressure ring are made of a single body.

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