KR200333861Y1 - A sealing cap for a pipe - Google Patents

Abstract

The present invention relates to an end closure cap of a pipe for sealing an end of the pipe to prevent the fluid inside the pipe from leaking, the configuration of which comprises a bolt having a head and a screw that can be rotated and fastened or dismantled; A base member having a nut portion having a female thread corresponding to the threaded portion of the bolt and a nut portion fixed thereto, a crimping portion having a hole corresponding to the threaded portion of the bolt and a groove corresponding to the head of the bolt; Being seated on the pressing portion of the base member, it is composed of a washer (washer) to strengthen the coupling force between the bolt and the base member.

Description

End cap for pipe end {A sealing cap for a pipe}

The present invention relates to a stopper for sealing the end of the pipe to seal the end of the pipe to prevent the cooling water and the like outflow, and more specifically, the end-opening stopper of the pipe of the present invention of the present inventors (application No. 20-2003-0005042) relates to an end closure cap of a pipe which has enhanced the coupling force between the bolt and the base member.

Generally, a mold is equipped with many cooling water paths. The end of the cooling water passage should be closed to prevent leakage of cooling water, etc. In the related art, a method of tapping the inner circumference of the distal end of the cooling water passage and fastening a tap bolt is used. In addition, in order to prevent the leakage of the cooling water more completely, a method of winding a tape or sealing with an adhesive on the threaded outer surface of the tab bolt was used.

However, according to the tab bolt fastening method, there is a problem in that the tapping operation must be performed on the inner circumferential surface of the pipe to seal the end of the pipe with the cooling water of the mold. To eliminate this problem, pipe plugs have been developed to omit tapping operations. This stopper basically uses the principle of screws and wedges. That is, the principle of sealing the end of the pipe by using the axial force generated by tightening the bolt.

However, the pipe plug has a number of component parts, and thus, there is a problem in that manufacturing cost and assembly labor are high.

As a countermeasure against this, the inventors of the present invention invented a pipe stopper having a low manufacturing cost and a man-hour of assembly in the "end closure plug of a pipe". The configuration of the above-described invention is briefly described with reference to FIGS. 1A, 1B, and 1C.

First, as shown in FIG. 1A (front and side views of the bolt), the bolt 100 consists of a threaded portion 102 and a head 104. The threaded portion 102 is formed with a tab 102a to couple or disassemble the bolt 100 to the base member to which the nut is fixed, and the head 104 has means for rotating the bolt 100 to couple or disassemble the bolt 100 to the base member. That is, the hexagonal wrench groove 104c of a predetermined width and depth is formed to use the hexagonal wrench 306 as shown in FIG. 1C.

As such, the bolt 100 is characterized in that the outer periphery 104b is larger than the inner periphery 104a of the head portion, it is preferable to be manufactured using stainless steel (aka, stainless bolt).

Next, the base member to which the nut is fixed is as shown in FIG. 1B.

As shown in FIG. 1B (front view and side view of the base member), the base member 200 is composed of a nut portion 202 and a crimping portion 204.

Inside the nut part 202, a tab 202a, which is a female thread corresponding to the threaded tap (102a in FIG. 1A) of the bolt, is formed. In addition, the nut part 202 is fixed to the crimping part 204 in order to prevent the bolt from going back due to the flow of the nut part 202 when the bolt is coupled or disassembled. The nut part 202 is formed by insert injection in the crimping part 204.

As shown in the figure, the pressing portion 204 has a cylindrical shape to be pressed against the inner wall of the pipe, and has a cylindrical hole 204a for smooth coupling with the threaded portion of the bolt (102 in FIG. 1A), and Grooves 204b having the same shape as the head of the bolt (104 in FIG. 1A) are formed on the same axis as the hole 204a.

One of the characteristics of the crimping portion 204 is that the diameter of the bottom surface 204d and the top surface 204e is different. That is, the diameter of the bottom surface 204d corresponds to the inner diameter of the pipe to be sealed, and the diameter of the top surface 204e is made larger than the diameter of the bottom surface 204d to have a strong bonding force.

As such, the base member 200 is preferably made of a material such as urethane, rubber, PVC, or the like that is hardly deformed at high temperatures.

1c illustrates a state in which a pipe is sealed using a stopper according to the inventor's prior application described above. In FIG. 1C, reference numeral 302, which is not described, is a mold, and 304 is a coolant.

Thus, the present inventors have developed the present invention by feeling the necessity of strengthening the coupling force between the bolt and the base member in the above-described invention.

The present invention is conceived to reinforce the coupling force between the base member including the bolt and nut portion and the crimping portion of the "end sealing plug of the pipe" which is the above-described invention of the present inventors, the purpose of the present invention is to compress the base member It is to provide a stopper for closing the end of the pipe to increase the coupling force of the bolt and nut by mounting a washer in the flotation.

Another object of the present invention is to tighten the tightening of the outer peripheral surface of the extended bolt head and the washer seated on the crimping portion of the base member by tightening the bolt when engaging the base member by extending the outer peripheral length of the bolt In view of the above, it is to provide an end closure cap of the pipe is strengthening the coupling force between the bolt and the base member.

Figure 1a, Figure 1b, Figure 1c is a pipe plug configuration of the present invention of the present inventors.

Figure 2a is a block diagram of a first embodiment according to the present invention.

Figure 2b is a cross-sectional view of a closed state of the pipe with a stopper according to the first embodiment of the present invention.

Figure 3a is a block diagram of a second embodiment according to the present invention.

Figure 3b is a cross-sectional view of a closed pipe with a stopper according to a second embodiment of the present invention.

Figure 4 is a modified structural view of the washer according to the present invention.

<Description of Drawing>

Thread 2 Tab 3, 15 Head 4 Wrench groove 6 Inner 7a Outer 7b Bolt 10

Nut section 12 Washer mounting groove 13 Crimp section 14 Hole 17 Bottom 18a Top 18b

Groove 19 Base member 20 Washer 30 Mold 40 Coolant 50 Wrench 60

The present invention relates to an end closure cap of a pipe for sealing the end of the pipe to prevent the fluid inside the pipe from leaking out, and the configuration thereof is as follows.

A bolt having a head part and a thread part which can be rotated to be fastened or disassembled;

A base member having a nut portion having a female thread corresponding to the threaded portion of the bolt and a nut portion fixed thereto, a crimping portion having a hole corresponding to the threaded portion of the bolt and a groove corresponding to the head of the bolt;

Being seated on the pressing portion of the base member, it is composed of a washer (washer) to strengthen the coupling force between the bolt and the base member.

The present invention having the configuration as described above is to enhance the coupling force between the bolt and the base member by the insertion of the washer,

First, the washer (swasher) in the washer seating groove formed on the crimping portion of the base member to strengthen the coupling force of the bolt and nut in accordance with the tightening of the bolt and

Second, as the bolt is tightened by extending the outer circumferential length of the bolt, the tightening between the extended outer circumferential surface of the bolt head and the washer seated on the crimping portion of the base member is strengthened, thereby strengthening the coupling force between the bolt and the base member as a whole. It has a structure.

In the above, the washer (washer) according to the present invention refers to a round and thin metal plate (or metal ring) that is put under the nut when the object is removed by bolts or nuts. That is, the washer serves to prevent the nut from loosening.

This will be described in detail the features of the washer.

The diameter of the washer is larger than the head of the bolt to stabilize the head of the bolt. However, the most important role is that it is sandwiched between the bolt and the nut to strengthen the tightening of the bolt and nut. The strength of this tightening is related to the frictional force with the bolt head. Therefore, when the washer is inserted and tightened, the contact surface increases, and the tightening force becomes stronger.

Hereinafter, with reference to the drawings will be described an embodiment according to the present invention.

Example 1

According to a first embodiment of the present invention, a washer is mounted on a crimping part of a base member to strengthen a coupling force of a bolt and a nut part. The configuration thereof is illustrated in FIG. 2A.

As shown in Figure 2a, the end closure cap structure of the pipe according to the present embodiment is largely composed of three parts.

That is, the bolt 10 including a screw portion 2 formed with a head portion 4 and a screw tab 3 that can be fastened or disassembled by a predetermined means such as a wrench;

The nut part 12 and the nut part 12 in which the female thread 15 corresponding to the threaded part 2 of the bolt 10 is formed are fixed, and the hole 17 corresponding to the threaded part 2 of the bolt 10 and the groove 19 corresponding to the head part 4 are formed. A base member 20 including a crimping portion 14 having a washer seating groove (depth “h”) 13 formed therein; And

The washer seated in the washer seating groove 13 formed in the crimping portion 14 of the base member, it consists of a washer 30 to strengthen the coupling force of the bolt 10 and the base member 20 in accordance with the tightening of the bolt.

As described in the above configuration, a feature of the present embodiment is a washer seating recess 13 in which the washer 30 is seated in the crimping portion 14 of the base member 20, and the washer 30 is seated in the seating recess 13.

In the above, in the bolt 10 according to the present embodiment, the outer circumference 7b of the head portion 4 is larger than the inner circumference 7a. The material of such bolts is preferably made of stainless steel.

In addition, in the base member 20 according to the present embodiment, the diameter of the bottom surface 18a of the crimping portion 14 corresponds to the inner diameter of the pipe to be sealed, and the diameter of the top surface 18b is larger than the diameter of the bottom surface 18a. The material of the base member is preferably a material such as urethane, rubber or PVC, which is hardly deformed at high temperatures.

As described above, the process of sealing the pipe using the pipe end closure cap according to the embodiment of the present invention will be described with reference to FIG. 2B is a cross-sectional view showing a state in which a pipe is sealed with a stopper according to the present embodiment.

First, the base member 20 is inserted into the end 50 with the cooling water of the mold 40 to be sealed. At the time of insertion, the bottom face 18a of the base member 20 crimp 14 is inserted into the cooling water 50 inward. At this time, the diameter of the bottom surface 18a of the crimping portion 14 of the base member 20 coincides with the inner diameter of 50 with cooling water, and the diameter of the top surface 18b of the crimping portion 14 of the base member 20 is the same as that of the bottom surface 18a. Greater than diameter (ie greater than 50 inner diameters with cooling water). Since the crimping portion 14 has a predetermined elastic force, when the base member 20 is fully inserted into the cooling water 50, the crimping portion 14 of the base member 20 contracts toward an axis, and as a result, the groove 19 of the crimping portion 14 is also narrow. You lose.

Next, after the washer 30 according to the present embodiment is seated in the washer seating groove 13 of the base member 20 crimp 14, the bolt 10 is rotated using a wrench 60 to fasten the bolt 10 to the base member 20. At this time, since the groove 19 of the crimping portion 14 is contracted toward the shaft in the state where the base member 20 is inserted into the coolant 50, the head 4 of the bolt 10 formed larger than the groove 19 of the crimping portion 14 is formed on the base member 20. As it is tightened, the crimping portion 14 is forced by the principle of the wedge, and is strongly pressed against the inner wall of the cooling water 50 by cooling water. In addition, as the washer 30 is inserted into the seating groove 13 of the base member 20 crimping portion 14 and the bolt 10 is tightened, the contact surface of the bolt 10 becomes wider, and the tightening force with the base member 20 nut part 12 becomes stronger. Therefore, the coupling force between the bolt 10 and the base member nut 12 is strengthened.

On the other hand, the process of dismantling the pipe plug according to the present embodiment in a closed cooling water channel is as follows.

The bolt 10 is rotated in a direction opposite to the direction in which the bolt 10 is tightened by using a wrench 60, and the bolt 10 is removed from the base member 20 (at this time, the washer 30 mounted on the washer seating groove 13 of the base member 20 is separated). The bolt 10 having a tab having the same dimensions as the threaded tap 3 and having a threaded portion longer in the axial direction than the threaded portion 2 of the bolt is fastened to the nut 12 of the base member 20, and then the fastened bolt is fixed to the predetermined tool. Alternatively, the base member 20 is dismantled from the 50 with cooling water by applying force by hand.

Example 2

The configuration of the plug according to the embodiment of the present invention is the same as the configuration of the plug of the first embodiment described above. However, in order to further strengthen the coupling force between the bolt and the base member, the outer circumference of the head of the bolt is formed to extend so that the head of the bolt overlaps at least part of the washer when viewed in the insertion direction to the pipe end, so that the bolt and the base The tightening of the bolt is tightened with the outer periphery of the bolt head and the washer seated on the crimping portion of the base member as the bolt is tightened, thereby strengthening the overall coupling force between the bolt and the base member. The configuration thereof is illustrated in FIG. 3A.

As shown in FIG. 3A, the premise stopper configuration is the same as that of FIG. 2A, which is a configuration diagram of the first embodiment described above. However, in order to further enhance the coupling force between the bolt and the base member, in the present embodiment, the length of the head 4 outer circumference 7b of the bolt 10 is extended by "L". That is, the extended length "L" was extended by the length of the base member 20 upper surface 18b. As a result, the washer 30 seated in the washer seating groove 13 of the base member 20 and the outer circumference 7b of the bolt 10 head portion 4 extended by tightening the bolt 10 is further tightened. Therefore, the coupling force between the bolt 10 and the base member 20 is strengthened.

As shown in FIG. 3B, the pipe is sealed with a pipe end closure stopper according to the embodiment of the present invention.

As shown in Figure 3b, the process of sealing the pipe with a stopper according to the present embodiment is the same as the sealing process in the first embodiment described above, a detailed description thereof will be omitted.

The characteristic point is that, as shown, as the bolt 10 is tightened, the washer 30 seated in the washer seating groove 13 of the base member 20 and the outer circumference 7b of the bolt 10 head 4 is strongly coupled. That is, the contact surface between the bolt 10 and the base member 20 is widened, so that the bonding force becomes strong.

On the other hand, the process of dismantling the pipe plug according to the present embodiment from the cooling water 50 is the same as the process of the first embodiment described above.

In the first and second embodiments of the present invention, a circular metal ring washer 30 is used, but is not limited thereto. A circular metal plate washer shown in FIG. 4 may also be used.

Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the above-described embodiments, and should be interpreted by the following utility model registration claims.

The effect of the pipe end closure plug of the present invention is as follows.

First, there is an effect of strengthening the coupling force of the bolt and nut by mounting the washer on the pressing portion of the base member.

Second, as the bolt extends the outer circumference of the head and tightens the bolt when the bolt is coupled with the base member, the tightening of the extended outer circumferential surface of the bolt and the washer seated on the crimping part of the base member is strengthened. The bonding force between the base member is enhanced.

Claims (5)

In the end closure cap of the pipe for sealing the end of the pipe to prevent the fluid inside the pipe from flowing out, A bolt having a head part and a thread part which can be rotated to be fastened or disassembled; A base member having a nut portion having a female thread corresponding to the threaded portion of the bolt and a nut portion fixed thereto, a crimping portion having a hole corresponding to the threaded portion of the bolt and a groove corresponding to the head of the bolt; As the seated on the pressing portion of the base member, including a washer (washer) to enhance the coupling force between the bolt and the base member, Insertion of the washer to strengthen the coupling between the bolt and the base member, the end cap of the pipe. The method of claim 1, The stopper for closing the end of the pipe, characterized in that the washer seating groove is formed on the crimping portion of the base member. The method of claim 1, And said washer is a circular metal plate. The method of claim 1, And the washer is a circular metal ring. The method of claim 1, End cap of the pipe is characterized in that the outer periphery of the head of the bolt is formed to extend so that the head of the bolt overlaps at least a portion of the washer when viewed in the direction of insertion into the pipe end.