KR100745653B1 - front insert type union - Google Patents

Abstract

The present invention is to be coupled in a manner that the union screw is inserted obliquely in front of the union flange portion to be able to be combined even in the case of a screw portion larger than the diameter of the union flange portion and at the same time to be able to form a female thread as well as a male thread on the thread portion. It relates to a forward inserting union. According to the present invention, a screw is formed at the rear side to be connected to the first pipe, and a union flange is formed at the front side with a diameter smaller than the diameter of the rear side; And one side is formed with a diameter that can be inserted into the front side of the union flange and formed on the upper and lower portions of the circumferential surface to be caught on the engaging portion of the front side of the union flange, the other side is to be connected to the second pipe Provides a front inserting union, characterized in that the screw thread is formed; the union screw portion is inserted into the front side of the union flange, including.

Union, Flange, Male, Female, Pipe, Forward Insert

Description

Front insert type union}

1 (a) and (b) show a state in which a union screw part with a female thread is engaged as a first embodiment of the union of the present invention.

2 shows a coupling state according to the first embodiment of the union of the present invention.

3 is a cross-sectional view of the union state.

4 (a) and 4 (b) show a state in which a union screw part in which a male screw is formed is engaged as a second embodiment of the union of the present invention.

FIG. 5 illustrates a state in which the union of FIG. 4 is coupled.

6 is a cross-sectional view of the union state.

7 (a), 7 (b) and 7 (c) are views illustrating a state of engagement of a conventional union.

Explanation of symbols on the main parts of the drawings

5: 1st pipe 7, 50: 2nd pipe

10, 20: union flange 12, 22: locking part

15, 30: Union thread 16, 35: protrusion

17: male threaded portion 33: female threaded portion

A: Conventional Insertion Direction B: Forward Insertion Direction of the Present Invention

The present invention relates to a front insertion type union, and more particularly, the union screw portion is coupled in such a manner as to be inserted obliquely from the front of the union flange portion, so that the screw portion larger than the diameter of the union flange portion can be combined with the union portion. The present invention relates to a front inserting union that enables to form female threads as well as female threads.

The conventional structure of the union used for pipe fittings is shown in FIG.

As shown in FIG. 7 (a), the conventional union screw unit 110 is formed of a male screw, and the inside of the union screw unit 110 is bored in a cylindrical shape, and a screw for coupling to the outer circumference is formed. The union screw 110 is inserted into the union flange 120 is coupled so that the locking portion 115 of the screw portion is caught by the locking jaw 122 of the flange. Figure 7 (b) and (c) shows a cross section for such a coupling method.

As a result, the flange 120 and the threaded portion 110 are coupled in the A direction as shown in FIG. 7 (b), and in this case, there are various problems.

First, there is a problem that the size of the union screw portion is limited to the size that can be inserted into the flange. The size of the flange is usually determined by various conditions such as the size of the pipe at the connection part and securing the space around the connection part. However, the size of the flange is limited to some extent due to the complexity of the pipe connection part and the difficulty of the fastening operation. Therefore, there is a problem that it is difficult to form a thread having a diameter larger than the size of the through part of the flange.

In addition, it is more advantageous for the connection of the pipe to form the female thread rather than the male thread, but in the conventional case, in order to form the female thread there is a problem that the front portion of the union thread is too large to be inserted into the union flange 120. . This can be solved by increasing the size of the union flange and increasing the diameter of the locking portion of the union thread. However, considering the size of the pipe joint and the piping situation, there is a problem that it is difficult to make the flange larger than the allowable amount for the desired pipe joint. Done.

Therefore, research into a new structure capable of union coupling while increasing the size of the union screw portion has been continued in the art.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a union adopting a front insertion method that can make the size of the union screw portion larger than the diameter of the through portion of the flange portion according to the design.

In addition, it is an object of the present invention to form a union threaded portion of the female thread to facilitate the fastening operation when connecting the pipe and to provide a union that can be combined in a simple structure.

As a construction means for achieving the above object, the present invention is a screw flange is formed on the rear side to be connected to the first pipe, the front side is a union flange is formed with a diameter smaller than the diameter of the rear side; And one side is formed with a diameter that can be inserted into the front side of the union flange and formed on the upper and lower portions of the circumferential surface to be caught on the engaging portion of the front side of the union flange, the other side is to be connected to the second pipe And a threaded portion formed on the other side of the union threaded portion, wherein the threaded portion is formed of a female threaded portion having an outer diameter greater than or equal to the circumferential surface diameter of one side of the unioned threaded portion, and the outer surface of the female threaded portion is formed in a nut shape of a hexahedron. On the other hand, it provides a front inserting union, characterized in that the union screw portion is inserted into the front side of the union flange.

Preferably, the screw of the union flange is a female thread, the projections of the union screw portion is formed in the upper and lower portions of the circumferential surface of one side of the threaded portion, respectively, the circumferential angle from the center is also preferably within 45 degrees.

In addition, the screw portion formed on the other side of the union screw portion may be a male screw portion having an outer diameter or more than the circumferential surface diameter of one side of the union screw portion.

Also preferably, the first pipe and the second pipe may be a pipe having a threaded portion or a joint for pipe connection, and a packing may be installed on the front surface of one side of the union threaded portion.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The union of the present invention was to enable the front insertion type coupling method to allow the union screw portion is inserted into the front side of the flange to the union flange. In addition, through this front-insertable structure it is possible to form a variety of threads of the union thread.

First embodiment

1 (a) and (b) show a coupling scheme according to the first embodiment of the front insertion union of the present invention. 2 is a view showing a state in which the union with the pipe according to the first embodiment.

The present invention includes a union flange 10. The union flange 10 is formed in the shape of a nut having a hexagonal surface as a whole, the inner side is a through-hole shape, and the outer side is a hexagonal nut shape. The portion having the smaller diameter among the diameters of the inner through holes is made forward. At this time, the screw portion is formed on the rear side such that the first pipe 5 as shown in FIG. Here, the threaded portion may be formed by a male screw or a female screw according to various design conditions, but in this embodiment, the female screw 25 is formed.

The union flange 10 is formed on the front side of the engaging portion 12 of the diameter smaller than the diameter of the rear side. The locking portion 12 serves to hold the protrusion 16 of the union screw, which will be described later, so as not to be detached from the front side. The diameter of the locking portion 12 is formed smaller than the diameter of the screw portion on the rear side of the flange.

The present invention includes a union screw portion 15 that can be coupled to the front side of the union flange. The union screw portion is formed with one side inserted into the union flange and the other side opposite thereto. The union thread is formed with a through hole of an inner diameter similar to the pipe to which it is connected.

One side of the union threaded portion 15 is formed in a circular shape with a diameter that can be inserted into the front side of the union flange (10). On the circumferential surface of one side of the union screw portion 15, protrusions 16 are formed so as to protrude so as to be caught by the locking portions 12 of the flange 10, respectively. Therefore, in the state in which the protrusion part was formed, it becomes impossible to insert the union screw part 15 into the union flange 10 in a straight line. However, as shown in FIG. 1 (b), the union screw portion 15 can be inserted into the union flange 10 in a state where the union screw portion 15 is inclined at an angle. In an actual use state, since a straight array is formed as shown in FIG. 2, there is no fear that the front coupling (B direction) may be separated.

On the other hand, the projections 16 of the union screw portion 15 is formed on the upper and lower portions of the circumferential surface of one side of the screw portion, respectively, the circumferential angle from the center should be formed to be within 45 degrees. When inserted obliquely, as shown in FIG. 1 (b), when the protrusion 16 is spread too wide on the circumference, the circumferential angle (center angle of the fan shape) becomes large, even when tilted, insertion may be impossible. Therefore, it is desirable to secure the maximum circumferential angle that can be inserted.

On the other hand, in the conventional case when coupling in the A direction as shown in Figure 7 the outer diameter of the union screw portion should be formed to be smaller than the inner diameter of the through hole of the flange. However, since the union in the present invention is the front coupling method (B direction), it is possible to form the union screw portion irrespective of the diameter of the flange.

The other side of the union screw unit 15 is formed with a screw unit 17 to be connected to the second pipe 50. In this embodiment, female threads 17 are formed in union threaded portion 15. That is, the female screw 17 is formed on the other side of the union screw portion (15). Since the union of the present invention is coupled to the front side of the union flange 10, the female screw 17 may be formed to have an outer diameter greater than or equal to the circumferential surface diameter of one side of the union thread. In addition, the outer surface of the female screw 17 is formed in the shape of a nut of hexahedron.

Forming a female screw on the other side of the union screw unit 15 as in this embodiment provides an advantage that the coupling with the second pipe 50 is easy as shown in FIGS. In many cases, the second pipe 50 has a male thread, but when the threaded portion of the union is formed as a female thread, the second pipe 50 provides a great advantage in that connection is possible without a separate coupling flange. Conventionally, the only way to form the female screw portion is to increase the diameter of the flange itself to increase the overall union size. However, when the front coupling is performed according to the present invention, the female screw can be freely formed according to the design regardless of the size of the flange. There is an advantage.

On the other hand, since the outer surface of the female screw portion is a hexagonal nut shape, it is also easy to fasten in a narrow space. If the union thread is male threaded as in the first embodiment, the work must be carried out while holding both the male thread and the coupling flange, thereby eliminating the trouble and hassle.

3 is a cross-sectional view illustrating a connection state between the union and the first and second pipes according to the present invention. The first pipe 5 is a T-joint, and the second pipe 50 is a straight pipe. Here, the first pipe and the second pipe may be a pipe having a threaded portion at the connection portion or a joint for pipe connection, and may be any pipe joint member of a screwed manner.

The connection between the union and each of the pipes is made by first connecting the union flange 10 to the T-shaped joint 5 and then obliquely so that the protrusion 16 of the union thread 15 can be caught by the catch 12. Insert it. Thereafter, the union flange 10 is tightened so that the front surface of the joint 5 and the one end surface of the union screw portion 15 come into contact with each other so that a linear arrangement is naturally achieved. Next, the male screw 17 of the union screw portion is connected to the second pipe 50. After connecting in this way, the connection is made by tightening each connection part securely. At this time, the end surface of one side of the union screw unit 15, that is, the front surface, is attached to the packing to prevent leakage of the connection portion.

Second embodiment

4 (a) and 4 (b) show the union of the second embodiment of the present invention. FIG. 5 shows a state in which the union according to the second embodiment is connected with the first and second pipes, and FIG. 6 shows a cross section after the union is connected.

In the second embodiment, the union flange 20, the projection 35 of the union thread 30 are the same as in the first embodiment. However, in the second embodiment, the male screw 33 is formed in the union screw portion 30. At this time, since the union screw portion 30 is inserted into the front side of the union flange 20 as in the first embodiment, the male screw 33 is greater than or equal to the diameter of one circumferential surface of one side of the union screw portion 30, that is, the union flange 20. It is possible to form to have more than the inner diameter of the through-hole of the front surface of the.

As shown in FIG. 6, the male screw part 33 having the same inner diameter as the second pipe 7 is connected to each other by a straight connection flange 9 having female threads formed on both sides thereof. At this time, each rubber packing is installed on the connection surface to prevent leakage.

Although not shown in the drawings, reference numeral 37 designates an internal through hole, 22 designates a locking portion of the union flange, and 5 designates a first pipe. 2 and 5, the first pipe is partially illustrated in a front view instead of a cross section for convenience of description.

The present invention has the effect of providing a union that can freely design the union screw portion by adopting a front insertion method that can be larger than the diameter of the through portion of the flange portion according to the design of the union screw portion.

In addition, the present invention provides an effect of forming the union screw portion with a female thread to facilitate the fastening operation when connecting the pipe and to allow the union to be combined with a simple structure.

While the invention has been shown and described with respect to particular embodiments, it will be understood that various changes and modifications can be made in the art without departing from the spirit or scope of the invention as set forth in the claims below. It will be appreciated that those skilled in the art can easily know.

Claims (8)

A screw flange is formed at a rear side thereof to be connected to the first pipe, and a union flange at a front side thereof having a locking portion having a diameter smaller than that of the rear side; And One side is formed with a diameter that can be inserted into the front side of the union flange, and the upper and lower portions of the circumferential surface is formed with a protrusion to be caught on the engaging portion of the front side of the union flange, the other side is screwed to be connected to the second pipe Union screw portion is formed; includes The screw portion formed on the other side of the union screw portion is formed of a female screw portion having an outer diameter greater than or equal to the circumferential surface diameter of one side of the union screw portion, and the outer surface of the female screw portion is formed in the shape of a nut of hexahedron, And the union screw portion is inserted into the front side of the union flange. The front inserting union of claim 1, wherein the screw of the union flange is a female thread. 2. The front inserting union of claim 1, wherein the protrusions of the union screw portion are respectively formed at upper and lower portions of the circumferential surface of one side of the screw portion, and the circumferential angle from the center thereof is within 45 degrees. delete delete The front inserting union according to claim 1, wherein the screw portion formed on the other side of the union screw portion is a male screw portion having an outer diameter greater than or equal to the circumferential surface diameter of one side of the union screw portion. The front inserting union according to claim 1, wherein the first pipe and the second pipe are threaded pipes or joints for pipe connection. The front inserting union of claim 1, wherein a packing is installed on a front surface of the one side of the union screw unit.

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