KR20010058324A - Clasp for preventing an unfastening of fitting - Google Patents

Abstract

PURPOSE: A releasing prevention latch of a pipe connecting fitting is provided to prevent fluid leakage by preventing a screw from being released caused by outer mechanical vibration, the shaking of a piping and repeated thermal expansion and restriction. CONSTITUTION: A releasing prevention latch consists of a first and a second member(10,20) and a fixing pin(30) combining each member. A fitting body(1) is inserted into an inserting hole(13) of the first member and a union nut(3) is inserted into an inserting hole(23) of the second member. Then, four protruding portions(11,21) of the first and the second member are vertically arranged in a line to match each pinhole(12,22) of the protruding portions. After that, the fixing pin is inserted into the pinholes to solidly combine the first and the second member.

Description

Anti-loosening latch on fitting for pipe connection {CLASP FOR PREVENTING AN UNFASTENING OF FITTING}

The present invention relates to an anti-loosening latch of a fitting for pipe connection, and more particularly to a latch for preventing loosening of a fitting used to connect two pipes.

Generally, fittings are used to change the path of a pipe through which a fluid is moved in a predetermined direction or to branch in various directions. For example, an L-shaped fitting is used to switch the pipe path to 90 °, and a T-shaped fitting is used to switch the pipe path to 90 ° and keep it in the straight direction. T-shaped fittings are also used to change the path of the pipe to 90 °. Since the fitting serves to connect the ends of the pipes in different directions, the airtightness to prevent the leakage of the fluid should be first and foremost completely secured.

1 shows a conventional fitting. As shown, a male screw 2 is formed on the outer circumferential surface of the fitting body 1, and the union nut 3 is coupled to the male screw 2. Therefore, a female screw (not shown) is formed on the inner circumferential surface of the union nut 3 to be coupled to the male screw 2.

However, since the conventional fitting is a simple screw coupling method in which a female screw and a male screw are fastened, the joining portion of the female screw and the male screw gradually becomes gradually due to various mechanical vibrations, fluctuations in the pipe, or repeated expansion and contraction due to heat. It is released. Therefore, if a small gap occurs at the joining portion of the female screw and the male screw, the fluid leaks through the gap.

If the fluid being transported through the pipe has physical properties that are harmful to the human body or cause serious damage to other equipment, for example, if the pipe is a pipe for semiconductor manufacturing, the fluid is mostly toxic gas, strong acid or strong alkaline It is a chemical. Accordingly, safety accidents such as choking of workers are caused by leaked harmful fluids. In addition, since most semiconductor manufacturing requires precision processing, the equipment also requires high precision and must be maintained, and even if exposed to some chemicals, the semiconductor equipment can be fatally damaged.

In addition, when the pipe to which the fitting is connected is attached to the moving system, there is a problem that the phenomenon that the female thread is loosened from the male thread is accelerated.

Accordingly, the present invention has been made to solve all the problems of the conventional fitting, the fluid is leaked to prevent the screw coupling portion to be released even by repeated expansion and contraction caused by external mechanical vibration, pipe shaking or heat. An object of the present invention is to provide an anti-loosening latch of a pipe connection fitting that can prevent a situation.

1 is a cross-sectional view showing a typical fitting.

2 to 4 are a plan view, a front view and a side view of the anti-lock catch according to Embodiment 1 of the present invention.

5 is an exploded cross-sectional view showing the direction in which the latch is coupled to the fitting.

6 is a cross-sectional view showing a state in which the latch is coupled to the fitting.

7 and 8 are cross-sectional views sequentially showing how the clasp according to Embodiment 2 of the present invention is coupled to the fitting.

9 and 10 are cross-sectional views showing two modifications in which the clasp is applied to a fitting used to connect two pipes according to Embodiment 3 of the present invention.

11 is a cross-sectional view showing that the clasp is applied to the elbow fitting according to the fourth embodiment of the present invention.

12 is a cross-sectional view showing that the clasp is applied to the T-shaped fitting according to the fifth embodiment of the present invention.

-Explanation of symbols for the main parts of the drawing-

One ; Fitting body 2; External thread

3; Union nut 10; First member

20; Second member 30; Push pin

11,21; Protrusion 12,22; Pin ball

13,23; Insertion hole 14; Jam

In order to achieve the above object, the anti-loosening latch according to the present invention has the following configuration.

The clasp includes a first and a second member and a fixing pin for fixing the first and the second member in an engaged state. The first member has an insertion hole into which the fitting body is fitted, and the second member has an insertion hole into which the union screw of the fitting is fitted. Each of the first and second members has at least one protrusion formed from opposite surfaces. Each of the protrusions is provided with pin holes to which the fixing pins are fastened, and the first and second members are coupled by fastening the fixing pins to the pin holes in a state where the protrusions are butted up and down. On the other hand, it is preferable that a locking step for preventing the first member from moving in the opposite direction to the union nut is formed at the inner wall portion of the insertion hole of the first member facing the union nut.

According to the configuration of the present invention described above, since the first member fitted to the fitting body and the second member fitted to the union nut are coupled to each other by fixing pins, the fitting body and the union nut which are released only after being rotated in opposite directions to each other are first and first. 2 Unless the member is separated, it will never be released.

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

Example 1

2 to 4 are a plan view, a front view and a side view of the anti-lock catch according to Embodiment 1 of the present invention, Figure 5 is an exploded cross-sectional view showing the direction in which the clasp is coupled to the fitting, Figure 6 is a clasp coupled to the fitting It is sectional drawing which showed the state.

2 to 4 show the shape of the clasp according to the invention in detail. As shown, the clasp according to the present invention includes the first and second members 10 and 20, and a fixing pin 30 for coupling each member 10 and 20. In Example 1, the shape of the 1st member 10 and the 2nd member 20 is the same. Therefore, although each member 10 and 20 are separately shown in FIG. 2, which is a plan view, only one member is shown in FIGS. 3 and 4, which are front and side views.

Under these conditions, as shown in FIGS. 2 to 4, each of the first and second members 10 and 20 has insertion holes 13 and 23. In the first embodiment, as shown in FIGS. 5 and 6, the first member 10 is fitted to the fitting body 1, and the second member 20 is fitted to the union nut 3. Therefore, the insertion hole 13 of the first member 10 has a diameter corresponding to the diameter of the fitting body 1, and the insertion hole 23 of the second member 20 has the diameter of the union nut 3. It has a diameter corresponding to. On the other hand, since the outer periphery of the fitting body 1 and the union nut 3 is generally hexagonal, each insertion hole 13 and 23 also becomes a hexagonal shape corresponding to it, as shown in FIG.

2 to 4, two protrusions 11 and 21 are formed on opposite surfaces of the first member 10 and the second member 20, respectively. Each of the protrusions 11 and 21 has pin holes 12 and 22 to which the fixing pin 30 is fastened, respectively. That is, the two protrusions 11 and 21 are formed at intervals enough to allow the other protrusions 11 and 21 to enter therebetween, so that the first and second members 10 and 20 are connected to the fitting body 1 and the union. When the nut 3 is fitted, the four protrusions 11 and 21 are arranged in a line, and the pin holes 12 and 22 coincide with each other. In the present embodiment, the protrusions 11 and 21 are illustrated as two, but there is no reason to limit the number to two, but at least one of them.

5 and 6 show how the first and second members 10, 20 of the structure described above are coupled to the fitting. The fitting has a structure in which the union nut 3 is coupled to the male screw 2 of the fitting body 1, as mentioned in the prior art. As shown in FIG. 5, the first member 10 is fitted to the fitting body 1 side, and the second member 20 is fitted to the union nut 3 side. Subsequently, as shown in FIG. 6, when the fitting body 1 and the union nut 3 are fitted into the insertion holes 13 and 23 of the respective members 10 and 20, a total of four protrusions 11, Each of the pin holes 12 and 22 coincides with 21 arranged in a line up and down. The fixing pin 30 is fastened to the matched pin holes 12 and 22, so that the first and second members 10 and 20 are firmly coupled.

As such, when the first and second members 10 and 20 are firmly coupled through the fixing pin 30, the fitting may never be released. The reason is that the fitting body 1 and the union nut 3 must be rotated in opposite directions to be released so that the first and second members 10, 20 are fitted to the fitting body 1 and the union nut 3. This is because the fitting body 1 and the union nut 3 can never rotate in opposite directions because they are coupled to each other. Therefore, in order to separate the fitting, it is possible only by first removing the fixing pins 30 from the pin holes 12 and 22 to release the coupling of the members 10 and 20. Meanwhile, in order to prevent the fixing pin 30 from falling out of the pin holes 12 and 22, a silicone rubber paint, which is a kind of adhesive, is applied to the entire surface of the fixing pin 30, and the fixing pin ( 30) is preferably firmly adhered to the inner walls of the pin holes 12 and 22, respectively.

Example 2

7 and 8 are cross-sectional views sequentially showing how the clasp according to Embodiment 2 of the present invention is coupled to the fitting.

In the second embodiment, the second member 20 is the same as the second member 20 of the first embodiment, except that the first member 10 is slightly different from the first member 10 of the first embodiment. Another difference is that the first member 10 has a latching jaw 14.

As shown in FIG. 7 and FIG. 8, the locking step 14 is formed along the entire circumference of the insertion hole 13 of the first member 10 facing the union nut 3. The catching jaw 14 serves to prevent the first member 10 from falling out in the direction of the fitting body 1, and serves to set the position of the first member 10 on the fitting body 1.

That is, as shown in FIG. 7, when the union nut 3 is separated from the fitting body 1, the first member 10 is inserted into the fitting body 1 from the union nut 3 direction. Since the body 1 is fitted into the insertion hole 13 of the first member 10 and caught by the catching jaw 14, the first member 10 is further prevented from entering the fitting body 1 direction. Then, as shown in FIG. 8, the union nut 3 is coupled to the male screw 2, and then the second member 20 is inserted into the union nut 3, and then the respective mated pin holes 12, 22 is fastened to the fixing pin (30).

Example 3

9 and 10 are cross-sectional views showing two modifications in which a clasp is applied to a fitting used to connect two pipes according to Embodiment 3 of the present invention.

In Examples 1 and 2, a fitting connected to one pipe is taken as an example. In Embodiment 3, a clasp according to the present invention is applied to a fitting used to connect two pipes arranged in a line.

As shown in FIG. 9, the fittings used to connect the two pipes have two union nuts each having a male screw 2 extending to both sides of the fitting body 1 and having the same diameter on both male threads 2. (3) consists of a combined structure.

Thus, the loosening of the fitting means that both union nuts 3 are loosened, so that both the first and second members 10 and 20 are fitted to both union nuts 3, so that the fixing pin 30 Are firmly combined. Therefore, here, the insertion hole of the first member 10 has a diameter corresponding to the diameter of the union nut 3.

On the other hand, FIG. 10 is a case where the diameter of both union nuts is different from that of FIG. That is, the diameter of the right union nut 3 is relatively longer in FIG. 10 than the left union nut 3a. Therefore, it is only necessary to form the insertion hole of each member 10 and 20 to the length corresponding to the diameter of the said union nut 3 and 3a.

Example 4

11 is a cross-sectional view showing that the clasp is applied to the elbow fitting according to the fourth embodiment of the present invention.

In the fourth embodiment, the clasp according to the present invention is applied to a fitting used to connect two pipes connected in a shape bent at 90 ° rather than two pipes arranged in a line.

As shown in FIG. 11, the fitting body 1b is in the form of an elbow bent at 90 °. Male threads 2b are formed at both ends of the elbow-shaped fitting body 1b, and union nuts 3b are coupled to each male screw 2b.

Therefore, as in FIG. 9, since the loosening of both union nuts 3b may be prevented, the first and second members 10 and 20 are fitted to the outer circumference of each union nut 3b. Since the union nuts 3b are arranged in an orthogonal manner, the first and second members 10 and 20 are also orthogonal to each other, and the protrusions 11 and 21 are arranged while crossing. The fixing pin 30 is fastened to the pin holes 12 and 22 matched by the cross-arranged protrusions 11 and 21 as in the above embodiments.

Example 5

12 is a cross-sectional view showing that the clasp is applied to the T-shaped fitting according to the fifth embodiment of the present invention.

In the fifth embodiment, the clasp according to the present invention is applied to a T-shaped fitting used to connect three pipes orthogonal to each other. Since three pipes must be connected, the fittings shown in FIG. 12 have male threads 2c formed in three directions orthogonal to each other in the fitting body 1c, and three union nuts 3c are formed on each male thread 2c. Are combined.

On the other hand, since the clasp must fix three union nuts 3c simultaneously, a total of three members are required in the fifth embodiment. The first and second members 10, 20 fitted to both side union nuts 3c arranged in a line are the same as those shown in the above embodiment, and the shape of the third member 40 to be added is the first and second. It is different from the two members 10 and 20.

The third member 40 has a pair of protrusions 41 arranged on both sides, as shown in FIG. That is, since the third member 40 is interposed between the two union nuts 3c arranged in a line and fitted to the central union nuts 3c perpendicular to each other, the protrusions 41 of the third member 40 A pair is arranged so as to intersect with each of the protrusions 10 and 20 of the first and second members 10 and 20 fitted to both union nuts 3c.

As described above, according to the present invention, by using the principle that the fitting body and the union nut must be rotated in the opposite direction to be released, a clasp for integrally connecting the fitting body and the union nut or both union nuts is applied. The fitting will never loosen unless it is first loosened.

On the other hand, the present invention is not limited to the above-described specific preferred embodiments, and various changes can be made by those skilled in the art without departing from the gist of the invention claimed in the claims. will be.

Claims (3)

A latch that prevents loosening of a pipe connection fitting with at least one union nut coupled to the fitting body. At least two members integrally connecting each of the fitting body and the union nut or the two or more union nuts so as to prevent each other from rotating in opposite directions; And It includes a fixing pin for connecting each member, Each member has an insertion hole into which a fitting body or union nut is fitted, and at least one protrusion is formed on one surface of each member, and each protrusion is formed with a pin hole to which the fixing pin is fastened. The anti-lock clasp of the pipe connection fitting, characterized in that each of the pin hole is matched while the protrusions of the respective members are arranged cross. According to claim 1, The inner wall of the insertion hole of the member to be fitted to the fitting body, for the pipe connection, characterized in that the locking jaw is formed to prevent the member fitted to the fitting body to escape in the opposite direction of the union nut. Anti-loosening latches on fittings. 2. The fitting according to claim 1, wherein the fitting is T-shaped with three union nuts, and the two members are fitted into two union nuts arranged in a row, and the member fitted to the union nut disposed at the center is a bilateral member. An anti-loosening latch of a pipe connecting fitting, characterized in that it has two protrusions arranged to intersect with the protrusions of the pipe.