KR200210137Y1 - Apparatus for connecting pipe of cable - Google Patents

Abstract

The present invention relates to a pipe joint for a cable for connecting a protective tube for receiving a cable or a receiving tube therein.

The present invention is to fasten the free end of the first body and the second body and the first body, the second body which is foldable on the first body so as to surround the first protective tube and the second protective tube together with the first body A first joint pipe having a fastening means and a projection coupled to the annular or spiral groove of the first protective pipe so as to be fixedly disposed in the first protective pipe; A first body, a second body foldably installed on the first body to surround the second protective tube together with the first body, fastening means for fastening the free ends of the first body and the second body, A second joint pipe having a protrusion coupled to the annular or helical groove of the second protective pipe to be fixedly disposed in the second protective pipe, the second joint pipe being screwed to the first joint pipe; And sealing means for maintaining airtightness between the first protective pipe and the second protective pipe and the first joint pipe and the second joint pipe to prevent foreign substances from entering the interior of the first protective pipe and the second protective pipe. It features. The present invention has a pair of seals and auxiliary seals as sealing means, and a first joint pipe and a second joint pipe which are screwed together to surround the seals, thereby firmly connecting the two protective pipes and at the same time the external moisture or other It has the advantage of keeping the airtight state so that foreign matter does not enter the inside of the protective tube through the joint.

Description

Apparatus for connecting pipe of cable

The present invention relates to a pipe fitting for a cable, and more particularly, to a pipe fitting for connecting a protective tube for receiving a cable or a receiving pipe therein.

When embedding cables such as communication and electric power underground, embed a protective tube made of synthetic resin with a large diameter of 6M in the basement and insert the cable directly into the protective tube, or insert a plurality of small-diameter accommodation tubes inside the protective tube. After insertion, a method of receiving the cable into the tube is being implemented.

On the other hand, since the protective tube and the cable or the receiving tube receives a very large frictional resistance in the process of pulling the cable or the receiving tube into the protective tube in the cable buried construction to pull the retractor or the vehicle, it is important to reduce the friction force. Therefore, Japanese Laid-Open Patent Publication No. 61-231816 proposes a cable protective tube in which a plurality of holes in which a cable is accommodated is formed integrally inside the protective tube. This sheath reduces the hassle of installing a separate sheath in the sheath and increases the cable placement density.

However, the above-mentioned protective tube has the advantage of omitting the installation of the receiving tube and increasing the cable arrangement density, but the disadvantage of increasing the length of the receiving tube or the protective tube due to the large frictional force still acting in the process of accommodating the cable in the receiving tube. This is being pointed out. In particular, the elongated accommodation tube or protective tube causes a problem that is deformed as the contraction after a certain time.

In addition, the above-described cable protection tube is formed in a straight line of about 6M in consideration of the location of the buried place and the direction of the course, there are a lot of joints, there is a lot of water leakage, relatively compared to the cable or receiving tube is carried around the drum Where there is a drop in the portability, and the direction of movement of the cable is changed even a little, there was a hassle to cut the protective tube and to be the cut portion by a separate connecting tube.

On the other hand, in order to solve such a problem, in recent years, it has been developed and used to form an annular or helical groove on the outer surface of the protective tube in the circumferential direction so that the protective tube can be stretched. Such a protective tube is not only not only has the advantage that can be changed freely in the place where the buried course is changed, but also can be stretched and wound around the cable drum has the advantage of improved portability. In particular, the soil or cement is filled between the annular or spiral grooves in the underground buried to prevent the shrinkage of the protective tube relaxed in the piping process.

However, the above-described protection pipe is also accompanied by a joint operation in which the pipe is cut in a predetermined length by various obstacles and obstacles buried underground, and then the cutting part must be connected again. On the other hand, care must be taken not to introduce foreign substances such as moisture and dust through the joint in the process of connecting the cut. If foreign matters such as moisture, dust, or the like are bent through the joints, or the joints are bent, the cable may be damaged.

Accordingly, the present inventors have developed a pipe joint for the cable to maintain the airtight state so that moisture or other foreign substances to enter the inside of the protective tube while the protective tube is firmly connected.

Accordingly, an object of the present invention is to provide a pipe fitting for a cable for firmly connecting a protective tube.

Still another object of the present invention is to provide a pipe joint device for maintaining the airtight state so that moisture or other foreign substances do not enter the inside of the protective tube through the joint connecting the protective tube.

1 is an exploded perspective view showing the configuration of a pipe fitting for a cable according to the present invention,

2 is a cross-sectional view showing a coupling state of FIG.

3 is a cross-sectional view showing a modification of the pipe joint device for a cable according to the present invention,

Figure 4 is an exploded perspective view showing another embodiment of a pipe joint for a cable according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

1: first sheriff 5: second sheriff

1a, 5a: groove 20: first joint pipe

22: first body 24: second body

26: turning 27: male thread

28: fastening means 30: second joint pipe

32: first body 34: second body

35: turning 37: female thread

38: fastening means

A feature of the present invention for achieving this object is that the annular or helical groove is formed along the outer surface and in the pipe fitting for the cable for connecting the first protective pipe and the second protective pipe for receiving the cable or the receiving pipe therein, A first body, a second body foldably installed on the first body so as to surround the first protective tube and the second protective tube together with the first body, and a free end of the first body and the second body fastening A first joint pipe having a means and a projection engaged with the annular or helical groove of the first guard pipe to be fixedly disposed in the first guard pipe; A first body, a second body foldable on the first body so as to wrap the second protective tube together with the first body, and fastening means for fastening the free ends of the first body and the second body; A second joint pipe having a protrusion coupled to the annular or helical groove of the second protective pipe to be fixedly disposed on the second protective pipe, the second joint pipe being screwed to the first joint pipe; It includes a sealing means for maintaining the airtight between the first protective pipe and the second protective pipe and the first joint pipe and the second joint pipe to prevent foreign matter from entering the interior of the first protective pipe and the second protective pipe.

In still another aspect of the present invention, a spiral groove is formed along an outer surface thereof, and a cable joint device for connecting a first protective tube and a second protective tube to receive a cable or a receiving tube therein, the first body and the first A second body that is foldable on the first body to wrap the first protective tube and the second protective tube together with the first body, fastening means for fastening the free ends of the first body and the second body, and the first protective tube A first joint pipe having a protrusion engaged with the helical groove of the first protective pipe to be fixedly disposed in the first pipe tube; A second joint tube having an inner diameter to be fitted to the outer circumferential surface of the second protective tube, and having a protrusion coupled to the helical groove of the second protective tube to be fixedly disposed on the second protective tube and screwed with the first joint tube; It includes a sealing means for maintaining the airtight between the first protective pipe and the second protective pipe and the first joint pipe and the second joint pipe to prevent foreign matter from entering the interior of the first protective pipe and the second protective pipe.

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

First, look at the cable sheath before explaining the pipe fittings for the cable. For convenience, one cable protective tube to be connected will be arbitrarily determined as the first protective tube 1 and the other cable protective tube as the second protective tube 5. As shown in FIG. 1, the first protective tube 1 and the second protective tube 5 can be seen that the annular or spiral grooves 1a and 5a are formed along the circumferential direction on the outer surface thereof. Can accommodate It can be seen that a plurality of accommodation pipes (2, 6) are integrally molded. Here, the accommodation pipes (2, 6) may be composed of a synthetic resin, it may be composed of a metal tube. And the receiving pipes (2, 6) in the first protective pipe (1) and the second protective pipe (5) are connected to match the inner diameter by the connecting pipe (3), the center of the receiving pipe (2, 6) in the first It can be seen that the connecting core 4 for imparting strength to the joint portions of the protective tube 1 and the second protective tube 5 is disposed.

On the other hand, the pipe joint device for a cable according to the present invention is configured to connect the first protective tube (1) and the second protective tube (5) facing. In detail, the tube fitting for the cable has a pair of seals (seal: 10) configured to surround the outer surfaces of the first protective tube 1 and the second protective tube 5 facing each other as shown in FIGS. 1 and 2. Have The seal 10 is made of a material such as soft rubber, silicone, or plastic sponge, and has an inner diameter 12 and an outer diameter 14. The inner diameter 12 is formed with an annular or helical protrusion 13 engaged with the annular or helical grooves 1a and 5a of the first and second protective tubes 1 and 5. The protrusion 13 is configured to have a smaller size than the grooves 1a and 5a of the first protective tube 1 and the second protective tube 5. On the other hand, the seal 10 is formed with a cutout 15 for opening the inner diameter 12 in the longitudinal direction, the seal lip (16) on the side of the seal 10 is formed along the circumferential direction. . Here, the cutout 15 opens the inner diameter 12 so as to easily wrap the seal 10 on the outer surfaces of the first protective tube 1 and the second protective tube 5, and the first protective tube 1 and the first protective tube 1 and the first protective tube 1 and the second protective tube 1. It may be formed diagonally along the circumferential direction in order to enhance the sealing effect with the 2 protective pipe (5). The seal 10 is arranged to face each other on the outer surface of the first protective tube 1 and the second protective tube 5 through the cutout 15 to be described later, the joint tube and the first protective tube 1 and the second protective tube. (5) Maintain confidentiality between. At this time, the seal lip 16 of the seal 10 is arranged to be in close contact with each other as shown in FIG.

And the pipe joint device of the present invention wraps the outer surface of the seal 10, respectively, the first joint pipe 20 and the second joint pipe 30 connecting the first protective pipe 1 and the second protective pipe (5) Have As shown in FIG. 1, the first joint pipe 20 covers the joints of the first protective tube 1 and the second protective tube 5 together with the first body 22 and the first body 22. It consists of a second body 24 that is foldably fixed to one end of the first body (22). Around the inner surface of the first joint tube 20 is formed a seating groove 25 in which the pair of seals 10 can be seated, the annular or helical groove of the first protective tube 1 on one side of the inner peripheral surface An annular or helical protrusion 26 engaged with (1a) is formed, and a male screw 27 is formed around the outer surface of the other side. Here, the annular or spiral projection 26 serves to prevent the longitudinal movement of the first joint pipe 20 with respect to the first protective tube 1, in the case of the annular is formed approximately one, spiral It is preferable to form about 1 lead. On the other hand, the male screw 27 is screwed with the female screw 37 of the second joint pipe 30 to be described later, a description thereof will be described later.

The first joint pipe 20 is provided with a plurality of fastening means 28 for fixing the free ends of the first body 22 and the second body 24. The fastening means 28 are a pair of support pieces 28a formed at the free end of the second body 24, rods 28b rotatably installed at the end of the first body 22, The first body 22 and the second body are screwed to the rods 28b and rotated as one side is supported between each of the support pieces 28a of the second body 24. It consists of fixed knobs 28c for bringing the sieve 24 into close proximity to one another. On the other hand, the first joint pipe 20 of such a configuration is made of a material such as hard plastic or metal, non-ferrous metal.

As shown in FIG. 2, the first joint pipe 20 is disposed on the outer surface of the joint of the first protective pipe 1 and the second protective pipe 5 so that the pair of seals 10 are disposed in the seating groove 25. do. At this time, an auxiliary seal 18 is disposed inside the contact portion where both ends of the first body 22 and the second body 24 come into contact with each other. The auxiliary seal 18 prevents foreign matter, such as moisture, from flowing into the first joint pipe 20 through the gap of the contact portion.

On the other hand, the second joint pipe 30 is composed of a first body 32 and a second body 34 foldably fixed to one end of the first body 32, similar to the first joint pipe 20. One side of the inner circumference is formed with an annular or helical protrusion 35 coupled with the annular or helical groove 5a of the second protective tube 5, and an internal thread 37 is formed on the other side of the inner circumference. . Here, the protrusion 35 on one side of the inner surface serves to prevent the longitudinal movement of the first joint pipe 20 with respect to the second protective pipe 5, and in the case of an annular shape, approximately one is formed and spirally formed. In the case of is preferably formed by approximately 1 lead. In addition, the female screw 37 is configured to be screwed with the male screw 27 on the outer surface of the first joint pipe 20, the first joint pipe 20 and the second joint pipe 30 is firmly coupled to each other. In particular, the male thread 27 and the female thread 37 rotate the first joint pipe 20 and the second joint pipe 30 opposite to each other, thereby bringing the first protective tube 1 and the second protective tube 5 into close proximity to each other. Connect them more firmly. In addition, the second joint pipe 30 is provided with a fastening means 38 for fixing the first body 32 and the second body 34. The fastening means 38 includes a pair of support pieces 38a formed at the free end of the second body 34, a rod 38b rotatably installed at the end of the first body 32, and a rod ( The fixed knob 38b which is screwed to 38b and is close to the first body 32 and the second body 34 as one side is supported and rotated between the support pieces 38a of the second body 34. It is composed of On the other hand, the second joint pipe 30 is made of a material such as hard plastic or metal, non-ferrous metals like the first joint pipe 20.

On the other hand, when the fixing jig (J) shown in Figure 1 connects the first protective tube (1) and the second protective tube (5) in advance, the position of the first protective tube (1) and the second protective tube ( It has a pair of legs Ja fitted into the annular or helical grooves 1a and 5a of 5) and has a plurality of fastening holes Jb. These fixing jigs J have a pair of legs Ja to be fitted into the annular or spiral grooves 1a and 5a of the first protective tube 1 and the second protective tube 5. The bolt B is inserted into the fastening hole Jb which is arrange | positioned in the protective tube 5, respectively, and the nut N is fastened to the edge part, and the 1st protective tube 1 and the 2nd protective tube 5 Fix the position.

Next, referring to the operation of the pipe joint having such a configuration, first, using the fixing jig (J), the first protective tube (1) and the second protective tube (5) in a state arranged to face each other the adhesive on the outer surface Is applied and the seal 10 is wrapped around the joints of the first protective tube 1 and the second protective tube 5. Then, the first joint pipe 20 is wrapped around the outer surface of the seal 10 so that the seal 10 is disposed in the seating groove 25, and then the first joint pipe 20 is formed using the fastening means 28. Fasten the first body 22 and the second body 24 of the firm. At this time, the auxiliary seal 18 is disposed on the inner surface of the contact portion of the first body 22 and the second body 24 of the first joint pipe 20 so that foreign matter such as moisture is transferred into the first joint pipe 20. Do not allow inflow. On the other hand, the annular or helical protrusion 26 of the first joint tube 20 is coupled to the annular or helical groove 1a of the first protective tube (1).

In this state, the protrusion 35 and the groove 5a are coupled to the outer surface of the second protective tube 5 so as to surround the second joint tube 30, and then the first body 32 using the fastening means 38. ) And the second body (34). On the other hand, a state where a certain amount of clearance is provided between the second protective tube 5 and the first body 32 and the second body 34 without completely rotating the fixing knob 38b of the fastening means 38. By rotating the second fitting pipe 30, the male screw 27 of the first fitting pipe 20 and the female screw 37 of the second fitting pipe 30 are combined. In addition, the first joint pipe 20 and the second joint pipe 30 are completely close to each other by completely rotating the fixing knob 38b of the fastening means 38 installed in the second joint pipe 30. The first body 32 and the second body 34 of the tube 30 is firmly fastened.

Therefore, the 1st protective pipe 1 and the 2nd protective pipe 5 cut | disconnected by such a structure are mutually connected. In particular, a pair of seals 10 and the first joint pipe 20 and the second joint pipe 30 which are fastened to each other while pressing the seal 10 are connected to the joint of the protective pipe 1 by external foreign matter. It can be sealed so as not to.

On the other hand, in the present invention by using the fastening means (28, 38) consisting of support pieces (28a, 38a) and rods (28a, 38a) and fixing knobs (28b, 38b) screwed to the rod (28a, 38a) Although the first bodies 22 and 32 and the second bodies 24 and 34 of the first and second joint tubes 20 and 30 are fastened to each other, the first and second joint tubes 20 are fastened using bolts and nuts. The first body 22 and 32 and the second body 24 and 34 may be fastened, and the first body 22 of the first and second joint pipes 20 and 30 may be fastened using a toggle mechanism. 32 and the second body (24, 34) can also be fastened.

3 shows a modification of the above-described cable pipe fitting. According to this, the tube fitting apparatus of a modification has a structure which does not form an annular or helical protrusion in the inner diameter 12 of the seal 10 arrange | positioned between the fitting pipes 20 and 30 and the protective pipes 1 and 5. As shown in FIG. This is because when the seal 10 is compressed by the first joint pipe 20 and the second joint pipe 30, the annular or spiral protrusion 13 may be damaged. If the protrusion 13 is damaged, the airtight function of the seal 10 is lost, and foreign matter may flow into the protective tubes 1 and 5.

Accordingly, in the pipe fitting of the modification, the rubber wire 19 is soft in the annular or helical grooves 1a and 5a of the first and second protective tubes 1 and 5 instead of the annular or helical protrusion of the seal 10. ) And wrap the seal 10 on its outer surface. By such a configuration, the seal 10 may be naturally deformed by the first joint pipe 20 and the second joint pipe 30, and may be pressed onto the outer surfaces of the first protective pipe 1 and the second protective pipe 5. will be.

Next, FIG. 4 shows another embodiment of the above-described cable pipe fitting. According to this, the pipe fitting apparatus of another embodiment has the structure which formed the cylindrical shape which has the inner diameter 42 and the outer diameter 44, without dividing the 2nd fitting pipe 40 into a 1st body and a 2nd body. Here, in the inner diameter 42 of the cylindrical second joint pipe 40 of another embodiment, the projections 45 coupled to the grooves 5a of the second protective pipe 5 and the external thread 27 of the first joint pipe 20. With screw Of course, the female screw 46 to be combined is formed.

As shown in FIG. 4, the pipe joint device of another embodiment of the present invention has the first protective tube as shown in the above-described embodiment in a state where the cylindrical second joint tube 40 is pre-inserted on the outer surface of the second protective tube 5. Adhesive is applied to the joints of 1) and the second protective tube 5, and then the seal 10 is wrapped. Then, after wrapping the first joint pipe 20 on its outer surface, the first body 22 and the second body 24 of the first joint pipe 20 using the fastening means 28 to firmly Tighten. In this state, the external thread 27 and the first threaded pipe 20 of the first jointed pipe 20 are rotated while the second jointed pipe 40 disposed on the outer surface of the second protective pipe 5 is rotated to approach the first jointed pipe 20. It is to couple the female screw 46 of the two joint pipe (40). As a result, the first coupling pipe 20 and the second coupling pipe 40 are coupled by the screw coupling of the male screw 27 of the first coupling pipe 20 and the female screw 46 of the second coupling pipe 40. The first protective tube 1 and the second protective tube 5 can be firmly connected to each other by the combination of the first joint tube 20 and the second joint tube 40.

As described above, the present invention includes a pair of seals and an auxiliary seal, which are sealing means, and a first joint pipe and a second joint pipe which are screwed together while surrounding the seals, thereby firmly connecting the two protective pipes and simultaneously Moisture or other foreign matter has the advantage of maintaining the airtight state to prevent the inflow of the inside of the protective tube through the joint.

On the other hand, the above embodiment is only to describe the preferred embodiment of the present invention, the scope of application of the present invention is not limited to such, and the present invention can be appropriately changed within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, the pipe fitting for the cable according to the present invention has a pair of seals and auxiliary seals as a sealing means and by having a first joint pipe and a second joint pipe screwed together while surrounding the seals, The protection tube is firmly connected and at the same time has the advantage of maintaining the airtight state so that external moisture or other foreign matter does not enter the inside of the protection tube through the joint.

Claims (3)

In the pipe fittings for the cable for connecting the first and second protective pipes having an annular or spiral groove is formed along the outer surface and receives the cable or the receiving pipe therein, A first body, a second body foldably installed on the first body to wrap the first protective tube and the second protective tube together with the first body, and fastening free ends of the first body and the second body A first joint pipe having a fastening means and a protrusion engaged with an annular or helical groove of the first protective pipe so as to be fixedly disposed in the first protective pipe; A first body, a second body foldable on the first body so as to wrap the second protective tube together with the first body, and fastening means for fastening the free ends of the first body and the second body; A second joint pipe having a protrusion coupled to the annular or helical groove of the second protective pipe to be fixedly disposed on the second protective pipe, the second joint pipe being screwed to the first joint pipe; And sealing means for maintaining airtightness between the first protective pipe and the second protective pipe and the first joint pipe and the second joint pipe to prevent foreign substances from entering the interior of the first protective pipe and the second protective pipe. Characterized in that the pipe fittings for cables. The method of claim 1, wherein the sealing means is a pair of seals disposed to face around the joints of the first protective tube and the second protective tube, the first protective tube on the inner peripheral surface of the seal And an annular or helical protrusion coupled to the annular or helical groove of the second protective tube. In the spiral tube is formed along the outer surface and the tube joint for the cable for connecting the first protective tube and the second protective tube for receiving the cable or the receiving tube therein, A first body, a second body foldably installed on the first body to wrap the first protective tube and the second protective tube together with the first body, and fastening free ends of the first body and the second body A first joint pipe having a fastening means and a protrusion engaged with the helical groove of the first protective pipe to be fixedly disposed in the first protective pipe; A second joint tube having an inner diameter to be fitted to the outer circumferential surface of the second protective tube, and having a protrusion coupled to the helical groove of the second protective tube to be fixedly disposed on the second protective tube and screwed with the first joint tube; And sealing means for maintaining airtightness between the first protective pipe and the second protective pipe and the first joint pipe and the second joint pipe to prevent foreign substances from entering the interior of the first protective pipe and the second protective pipe. Characterized in that the pipe fittings for cables.