KR20080097730A - A coupling band for connecting end of both pipes - Google Patents

Abstract

A coupling band for connecting end of both pipes is provided in which pipe diameter of a jacket varies according to contraction and expansion of a pipe made of plastic material. A coupling band for connecting end of both pipes comprises a sealing unit covering the connection part in which two pipes are contact with each other; a jacket, wrapping with the exterior of the sealing unit and fixing the connection part of two pipes; a core supportive member(6) mounted on one side periphery of the joint end part of jacket; a center core embedded in the core supportive member; a bracket mounted to the other side periphery of the joint end part of the jacket facing the core paper finger member; and a tensile force applying unit(8) for expanding and contracting the pipe diameter of jacket varying according to the contraction and expansion of the pipe.

Description

A coupling band for connecting end of both pipes}

1 and 2 are first and second exemplary views showing the configuration of a pipe coupling according to the prior art.

Figure 3 is an exploded perspective view showing the configuration of one embodiment of a coupling band for pipe joints according to the present invention.

4 is a front view showing the assembled state of FIG.

FIG. 5 is a cross-sectional view taken along the line A-A 'of FIG.

Figure 6 is a left side view of Figure 5;

7 is a sectional view showing a detailed configuration of a core which is a main part of the present invention.

Figure 8 is a plan view of Figure 5 showing a temporary tightening state of the coupling band for pipe joints according to the present invention.

9 is a partial cross-sectional view showing the detailed configuration of the coupling band for the pipe joint according to the present invention.

* Explanation of symbols for main parts of the drawings

2: sealing member 4: annular jacket

6: core support member 7: center core

8: Tensile force imparting means 10: bracket

12: temporary fastening means 14: hinges

The present invention relates to a coupling band for pipe joints for maintaining the watertightness of the connecting portion while connecting the pipelines for transporting the fluid, and more particularly, as the pipeline shrinks and expands due to the temperature of the fluid or the temperature of the external environment. The present invention relates to a coupling band for pipe joints that can reliably maintain the watertightness of the joints between pipe lines by flowing a pipe diameter of a jacket corresponding to a pipe diameter change dimension of a variable pipe line.

In general, oil and gas pipes, oil pipes for transferring fluids such as oil, gas pipes (hereinafter, collectively referred to as "pipe paths"), etc., are made of a synthetic resin material or a metal material depending on the transfer fluid. It is connected via a ring member.

The coupling member surrounds the abutment between the two pipelines for transporting the fluid or gas from the outside with a jacket, and tightens the jacket through a pair of fasteners consisting of bolts and nuts, thereby providing two pipelines by a tension force generated therefrom. In order to connect the two pipes closely and keep the fluid from leaking through the gap between the two pipe lines, the sealing part is composed of the sealing material at the joint area between the two pipe lines to maintain the airtight between the two pipe lines.

The coupling member should be tightly compressed so that the connection of the pipeline is not detached even if the pipeline fluctuates due to the impact of the two pipelines or the change in the pressure or flow of the fluid or gas flowing into the pipeline. It shall be ensured that there is a tight connection between the fitting gaps so that no fluid leaks out.

Conventional coupling members include "pipe coupling" of Utility Model Registration No. 0368056 (shown in FIG. 1) and "edgeless type pipe coupling of fastening force maintained" of Publication No. 2006-0009805 (shown in FIG. 2). ) And the like have been proposed.

Conventional coupling members include a sealing member made of rubber for enclosing a boundary between pipes to maintain airtightness; A metal jacket installed on an outer surface of the sealing member and having both ends bent in an outward direction to form a tension portion; A tension rod fitted to the tension portion of the jacket and having a plurality of fastening holes; It has a basic structure including a fastener (bolts and nuts) to be firmly connected to the pipes by tightening both ends of the jacket is inserted into the fastening hole of the tension bar.

FIG. 1 is a first example of a coupling member according to the prior art, and as shown in the drawing, a tension rod 106 is inserted into a tension plate 104 installed at both circumferential surfaces of a joint portion of a jacket 102. It consists of a configuration that is fastened to the nut 110 by passing through the bolt 108 in the direction crossing the tension bar 106. The pressing member 112 of the sealing member 114 is pressed by the pressing protrusion 112 formed on the inner circumferential surface of the jacket 102 by the fastening force of the bolt 108 and the nut 110 of the sealing member 114. Improve airtightness

FIG. 2 is a second example of a coupling member according to the prior art, and includes a protrusion 126 integrally at an outer circumference of a hole 124 of a tension rod 122 fitted to a tension plate 121, and the protrusion ( 126 and the inner surface slab washer 132 of the head 130 of the bolt 128 and the contact surface of the nut 134 coincide so that the overall tightening force generated by the bolt 128 and the nut 134 is tension bar ( 122 to impart a firm tensile force of the jacket (120).

However, since the jackets 102 and 120, the tension plates 104 and 121, and the tension bars 106 and 122 of these structures shown in the above examples are made of metal, the metal members of the coupling having the structure are made of synthetic resin. In maintaining the watertightness of the re-pipe, the watertightness is affected by the fluid temperature or the ambient temperature. When the pipe line of the synthetic resin material is connected to the metal coupling, there is a risk of water leakage due to the difference in physical properties due to the foreign material between the pipe line and the coupling. That is, the synthetic resin pipe line shrinks and expands according to the increase or decrease of the fluid temperature or the ambient temperature, and the diameter of the resin pipe line is variable, whereas the jacket surrounding the synthetic resin pipe line maintains the initial tightening force of the fastener made of bolts and nuts. It remains. Therefore, when the synthetic resin pipe is affected by a high temperature, that is, when the fluid flows at a high temperature or when the temperature of the surrounding environment is increased, the jacket expands together when the diameter of the pipe expands, so that the fixing force of the pipe connection is increased. There is a possibility that the sealing member 114 is lowered or broken.

In addition, when the synthetic resin pipe is affected by a low temperature, it shrinks to reduce the diameter, but because the jacket made of metal remains in its current state without changing the diameter, even if the fastener is firmly fastened to the jacket, the jacket is connected to the pipe. There is a problem that can not maintain the watertight because it results in a loose tightening.

On the other hand, the conventional couplings, but after the tension rod is inserted into the tension plate of the jacket to fasten the fastener to the through-hole of the tension rod to impart a tensile force to the jacket, but the tension rod that is fitted to the tension plate in the process maintains a loose fit Since it is not easy to fit the bolt in the through-hole of the tension bar, there is another problem that consumes a lot of time in the fastening operation.

In addition, since the jacket is made of a cylinder and occupies a large volume at the time of carrying and carrying, there is another problem that the cost of carrying is high.

Accordingly, the present invention has been proposed to solve the above problems, by forming a jacket of the synthetic resin pipe and the same material to eliminate the difference between the physical properties of the pipe and the jacket pipe line due to shrinkage and expansion of the synthetic resin pipe It is an object of the present invention to provide a coupling band for pipe fittings that can stably maintain watertightness by flexibly correcting a variable diameter of a jacket.

In addition, the present invention can simplify the fastening operation of the fastener by integrally forming the tension member for supporting the jacket and the fastener to the jacket, and by adding a high-tensile spring to the fastener, the diameter of the jacket shrinks the synthetic resin pipe and Another object is to provide a coupling band for conduit fittings that can be made to vary dynamically with expansion.

In order to achieve the above object, the present invention, sealing means for maintaining the airtight wrapped around the connection portion of the two pipes; A jacket wrapped on an outer surface of the sealing means to fix a connection of two pipes; A core support member mounted at one circumferential surface of the joint end of the jacket; A center core embedded in the core support member; A bracket mounted on the other circumferential surface of the other end of the jacket; And one side is installed on the core support member and the other side is connected to the bracket to impart a tensile force to fluidly fasten the joint end of the jacket, the diameter of the jacket to vary according to the shrinkage and expansion of the pipeline It provides a coupling band for a pipe joint including a tension imparting means for stretching.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 3 to 9.

Coupling band for pipe joint according to the present invention is a synthetic resin pipe is implemented to be able to maintain the water tightly by correcting the dimensions of the pipe diameter is changed by shrinking and expanding in accordance with the fluid temperature or ambient temperature.

3 to 6, a preferred embodiment of the present invention includes a sealing member (2) for wrapping a connection portion where two synthetic resin material lines are in contact with each other to prevent leakage of fluid; An annular jacket (4) composed of first and second bands (4a, 4b) divided into two radial members, and surrounding the outer surface of the sealing member (2) to fix the connection portions of the two conduits; A core support member (6) attached to one circumferential surface of one end of the annular jacket (4);

A center core 7 embedded in the core support member 6; One end is fixed to the center core (7), the other end is coupled to the bracket to be described later tension force providing means for imparting a tensile force to fluidly fasten the joint end of the jacket (4); A bracket (10) attached to the circumferential surface of the annular jacket (4) at the other end of the annular jacket (4) at a position opposite to the core supporting member (6) and having a “U 'shaped bolt support groove (10a) formed at a central position thereof; One side is installed at the central portion of the center core (7), the other side penetrates the bolt support groove (10a) of the bracket 10 so that the tension force applying means (8) before the jacket (4) to secure the jacket (4) Temporary fastening means 12 for temporarily fixing the joint end of the) and a hinge 14 provided in the connection portion of the first and second bands (4a, 4b) of the annular jacket (4).

As shown in FIG. 7, the central core 7 is embedded in the core support member 6, and includes a core body 20 made of engineering plastic to minimize rigidity and deformation; It includes a hollow protrusion 22 protruding outward at both sides of the predetermined position in the direction orthogonal to the core body 20.

 As shown in FIG. 9, the tensile force applying means 8 is fitted to the hollow protrusion 22 to be fitted from the bracket 10 side to the hollow protrusion 22 to tighten the joint end of the jacket 4 to impart a tensile force. A jacket fixing bolt 24; A first nut 26 installed on the inner surface of the hollow protrusion 22 and fastened to the jacket fixing bolt 24; The end of the hollow protrusion 22 is fastened to prevent the first nut 26 from being separated outwardly and to prevent the first nut 26 from moving along the jacket fixing bolt 24. A cap 28; A high tension spring inserted between the jacket fixing bolt 24 and the first nut 26 to increase or decrease the tensile force of the jacket fixing bolt 24 to correct a variable dimension of the diameter according to the contraction and expansion of the jacket 4 ( 30).

As shown in FIG. 8, the temporary fastening means 12 includes a ring-shaped head portion 30a at one side thereof, and the head portion 30a is embedded in the central portion of the core body 22 to be movable. The side has a ring-shaped bolt (32) which is supported through the bolt support groove (10a) of the bracket (10); A pivot pin 34 embedded in the core body 22 while being penetrated through the head portion 30a of the ring bolt 32 and functioning as a central axis to allow the ring bolt 32 to rotate up and down. and; It includes a second nut (36) to prevent the both ends of the jacket (4) that is fastened to the ring-shaped bolt (32) fitted in the bolt support groove (10a) of the bracket 10 apart.

The hinges 14 are installed in the first and second bands 4a and 4b of the half jacket 4, respectively, and the spiral rings 42 and 42 'and the spiral rings 42, which are fitted in the mutual gaps when joined. 42 'and hinges 44 that function as axes. The first and second bands 4a and 4b of the annular jacket 4 are opened and closed freely by the hinge 14 configured as described above, and when the hinge 14 is detached, the jacket 4 The first and second bands 4a and 4b can be loaded in a folded state, which is very easy to carry.

In the embodiment of the present invention, the annular jacket (4) is preferably molded of a synthetic resin material of the same type as the synthetic resin pipe. This is to identify the physical properties of the annular jacket (4) and the synthetic resin pipe line, so that the pipe flows in conjunction with the pipe line when the contraction and expansion according to the fluid or ambient environment temperature to correct the variable dimensions of the pipe line . By the same material of the conduit and the jacket, the sealing member 2 may play a supporting role in maintaining the airtightness reliably.

On the other hand, the coupling between the jacket 4 and the core support member 6 and the jacket 4 and the bracket 10 can be integrated by welding or injection molding by welding by heat fusion method. When joining by injection molding, first, the head 32a of the ring-shaped bolt 32 is flowably embedded in the center of the core body 20 in the injection molding machine, and the pivot pin 34 is positioned to penetrate the head. The raw material is poured into an injection molding machine and molded. Then, the core body 20 is placed in the core support member 6 injection machine, and the raw materials are poured to form the core body 20 and the core support member 6 into one body, and then the core is supported on the circumferential surface of the jacket 4. The member 6 is contacted and heat-sealed and fixed. In another method, the core body 20 is first molded in the above-described manner, and then the core body 20 and the jacket 4 are placed in the injection molding machine of the core support member 6, followed by molding by pouring the raw materials. The core body 20, the core support member 6 and the jacket 4 may be integrated.

Referring to the working state of the present invention configured as described above are as follows.

First, the sealing member 2 is fitted to the connection portion where the two pipes abut, and the first and second bands 4a and 4b of the annular jacket 4 are wrapped and fixed to the outer surface of the sealing member 2. At this time, the first and second bands (4a, 4b) of the annular jacket 4 is closed around the hinge 44 of the hinge 14 to surround the connecting portion of the two conduits. At this time, the ring-shaped bolt 32 is lifted up with the pivot pin 34 as the center, and the ring-shaped bolt is again brought into contact with the joint ends of the first and second bands 4a and 4b of the open jacket 4. (32) is lowered to support the ring-shaped bolt 32 in the bolt support groove (10a) of the bracket (10). The first and second bands 4a and 4b of the jacket 4 are fastened by tightening the second nut 36 to the ring bolt 32 so that the annular jacket 4 surrounds and supports the connection portions of the two conduits. ) Is temporarily fixed in contact with the state.

Next, the jacket fixing bolt 24 is inserted into the core protrusion 22 and the first nut 26 is fastened to rotate in one direction to tighten the joint of the annular jacket 4. At this time, the first nut 26 is prevented from being rotated by the closing cap 28 so that the first nut 26 does not move along the thread of the jacket fixing bolt 24, and conversely, the jacket fixing is performed. The bolt 24 is moved in the direction of tightening the joint of the annular jacket 4. In the state where the jacket fixing bolt 24 is completely tightened and fixed, the jacket fixing bolt 24 is maintained under the inherent elastic force of the high tension spring 30. When the pipe is expanded by being affected by the temperature of the fluid or the temperature of the surrounding environment to increase the diameter, the high tension spring 30 is compressed as the tensile force of the jacket fixing bolt 24 increases by the diameter of the pipe, thereby compressing the jacket. By expanding the diameter of (4), the pipe diameter variable dimension of the pipeline is corrected.

On the contrary, when the conduit is contracted, the tension of the jacket fixing bolt 24 decreases while the elastic force of the high tension spring 30 is tensioned, thereby reducing the diameter of the jacket to correct the variable dimension according to the reduction of the diameter of the conduit. .

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

As described above, according to the present invention, when the pipe diameter is changed by shrinking or expanding the pipe according to the temperature of the fluid flowing in the pipe or the temperature of the surrounding environment, the high tension spring fluidly increases and decreases the tension of the jacket fastening bolt. As the pipe diameter is elastically interlocked, the pipe diameter variable dimension of the pipe can be corrected, and accordingly, the sealing member has an effect of reliably maintaining airtightness.

In addition, the present invention is divided into the first and the second member by the hinge to the annular jacket, it is possible to stack a large amount of the first and second bands, has another effect that is very convenient to carry.

Claims (10)

Sealing means for maintaining the airtight wrapped around the connection portion of the two pipelines; A jacket wrapped on an outer surface of the sealing means to fix a connection of two pipes; A core support member mounted at one circumferential surface of the joint end of the jacket; A center core embedded in the core support member; A bracket mounted on the other circumferential surface of the other end of the jacket facing the core support member; And One side is installed in the center core and the other side is connected to the bracket to impart a tensile force to fluidly fasten the joint end of the jacket, the expansion and contraction of the diameter of the jacket in accordance with the pipe diameter that is variable according to the expansion and contraction of the pipe Tensioning means for Coupling band for pipe joints comprising a. The method of claim 1, One end is installed in the center of the tension imparting means, the other end is supported by the bracket further comprises a temporary fastening means for temporarily tightening before the tension imparting means tightens the joint end of the jacket Coupling bands for joints. The method of claim 1, The jacket comprises a first band and a second band divided into two radial members, the coupling band for pipe fittings, characterized in that the hinge is mounted to the connection portion of the first and second band. The method according to claim 1 or 2, The central core is A core body embedded in the core support member; And Hollow protrusions projecting outwardly from predetermined positions at both sides thereof in a direction perpendicular to the core body Coupling band for pipe joints comprising a. The method of claim 4, wherein The tensile force applying means A jacket fixing bolt inserted from the bracket side to the hollow protrusion side to impart a tension force to tighten the joint end of the jacket; A first nut embedded in the hollow protrusion and fastened to a jacket fixing bolt; A closing cap which is fastened to an end of the hollow protrusion to prevent the first nut from being separated outward and prevents the first nut from moving along the jacket fixing bolt; And A high tension spring is inserted between the jacket fixing bolt and the first nut, and increases and decreases the tensile force of the jacket fixing bolt to correct a variable dimension of the diameter according to the contraction and expansion of the jacket. Coupling band for pipe joints comprising a. The method according to any one of claims 1 to 3, The coupling band for a pipe fitting, characterized in that the jacket is formed of a material of the same type as the synthetic resin pipe. The method of claim 4, wherein The temporary fastening means A bolt support groove formed at the center of the bracket; One side is composed of a ring-shaped head, the head is buried in the center portion of the core body, the other side is a ring-shaped bolt is supported through the bolt support groove of the bracket; A pivot pin embedded in the core body while penetrating through the head of the ring-shaped bolt and functioning as a central axis to enable the ring-shaped bolt to rotate up and down; And A second nut which is secured to a ring-shaped bolt fitted into the bolt support groove of the bracket so that both ends of the jacket are separated from each other; Coupling band for pipe joints comprising a. The method of claim 4, wherein The coupling band for pipe fittings, characterized in that the core body and the hollow protrusions made of engineering plastics. The method of claim 1, Coupling band for pipe fittings, characterized in that the combination of the jacket and the core support member and the jacket and the bracket is welded by a heat fusion method. The method of claim 4, wherein The head of the ring-shaped bolt is buried in the center of the core body in a flowable manner, the pivot pin is positioned to penetrate the head of the ring-type bolt, and then the raw material is poured into the injection molding machine, and a portion of the core body and the jacket is inserted into the core support member injection machine. The coupling band for pipe joints, characterized in that the raw material is poured into the core body, the jacket and the core support member.

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