Cable jointing device

FIELD: cable jointing devices.

SUBSTANCE: cable jointing box provided with through duct to receive respective cable end mounts cup-shaped electric contact whose edge forms hold-down ring tightly enclosing reduced-diameter box section. Naked conducting member is placed between electric contact and box section. Hold-down ring is squeezed to tighten up joint between duct wall and cable sheath. Tightening sleeve is capable of holding two boxes, each being connected to cable through respective electric contacts. Sleeve provides for tight joint between interrelated cable parts in region bounded by sleeve and boxes.

EFFECT: enhanced quality of wire-to-cable joint.

8 cl, 10 dwg

 

The present invention relates to a connection device for a cable, the type of which is presented in the hedging part of claim 1 of the claims.

The place where is located one end of the cable and the connector, vulnerable for various reasons, primarily because the cable connectors may be located in an aggressive environment and to corrode, resulting in deteriorating or breaks electric connection cable with connector.

There is a danger that the water and the gaseous medium will penetrate axially into the end portion of the cable between the cable sheath and the wire or wires inside this shell. If the cable consists of a shielded wire or its technical equivalent, the surrounding gaseous or liquid medium can penetrate axially between the shield and the wire. If the cable sheath consists of a bundle of wires, the gaseous or liquid medium can penetrate axially between the wires, causing corrosion inside the cable.

The degree of protection connector, of course, also depends on the prevailing composition of the environment; in particular, vulnerable connectors located outdoors on the ground or in the water.

Known sealing the connecting zone between the end of the cable and the connector, however, the known resolved the complex I, the road, they are difficult to mount, they are also time-consuming in operation.

The present invention is the task of ensuring a quality connection between the wire cable and the connecting means.

Another problem solved by the present invention, is a device that provides a reliable electrical connection and a reliable sealing of the connection zone between the end of the cable and connector that can be achieved with a simple construction with low cost and easy to install.

This task is solved by a device corresponding applied to claim 1 of the claims.

Other variants of the device correspond to the attached dependent claims.

The present invention is based on the concept, on which the corresponding end portion of the cable twist is passed through the body of the connector, which has a channel or passage, matching the dimensions of the cable, and provide electrical contact with the connector open end of the wire that are in the cable. The body is made of an elastic material. In the connecting device has, mainly, a Cup-shaped end part, which is the end of the cable and which Gavrilovna so that the housing is hermetically taimanao periphery, pushing on the shell of the wire radially inward clamping (corrugated) element. Clamping force is transmitted to the pressure of the sheath on the wire, providing a seal at its periphery. If the cable is stranded, the corrugated element can also be used to preload the bundle of wires, preventing axial leakage.

Clamping sleeve forms a sealing cap, which is located on the casing, condensing the output end of the channel, and hermetically covering the said end of the cable and the open end of the wire cable, and the said end is in electrical contact with the clamping sleeve by means of its compression. Clamping sleeve can form a male electrical contact, or it can be supplied with socket contact.

In case there may be two or more channels, each of which includes a single cable and which pass through the center through an elastic body, which is sealed to install the presser corrugated sleeve having the shape of a bowl.

In addition, this may be the sealing sleeve, the inner peripheral part of which can tightly connect with the outer peripheral surface of the two together existing housing, providing a tight jumper mentioned buildings.

Hereinafter the invention will be described on the use of the e with reference to the accompanying drawings, on which:

1 schematically represents a longitudinal section of the connecting device according to the present invention.

Figure 2 is a cross section along II-II in figure 1.

Figure 3 is a transverse section along III-III in figure 1.

Figure 4 is a cross-section corresponding

2, but of another embodiment of the device according to the present invention.

Figure 5 is a cross-section corresponding to figure 3, but of a variant of the device shown in figure 4.

6 is a longitudinal section of another embodiment of the connecting device.

Fig.7 is a variant of the coupling device shown in Fig.6.

Fig represents another variant of the connecting device.

Fig.9 is a variant of the electrical contacts.

Figure 10 represents a modification of the variant shown in Fig.9.

Figure 1-3 shows a device for the electrical connection between the two cables 1. For simplicity you can assume that each cable 1 consists of a conductor 11 or its technical equivalent, which is tightly covered with the shell 12 forming the conductor 11 in the shell 12. The end part of the cable 1 passes through the Central channel 21, is made in the axisymmetric case 22, which has a reduced diameter at one end of the section 23. The shell 12 is removed from one to the NCA Explorer 11, and this bare end of the wire is bent back against the outer surface of section 23 of the housing. The clamping ring 30 mounted on the section 23 housing on top of the conductor 11, and it is compressed so that the section 23, which is made of deformable material, which is tightly pressed against the shell 12, completely covering it. Because the shell shrinks, the pressure will provide a tight sealed contact between the inner surface of the shell 12 and the conductor 11. When the conductor 11 and the shell 12 has a bundle of wires, the wires in the above-mentioned beam will also be shrinking radially. As a result, the channel 21 is sealed, except for its contact with the outer surface of the shell 12. The end part of the cable is compressed in the area of section 23, essentially preventing the passage of the medium axially through the interior of the cable. The clamp is removed from the terminal section 23. The clamping ring 30 is predominantly forms a peripheral part of the bowl-shaped element (see Fig.6), inside which is the exposed part of the wire, etc. associated with the interior of the elements mentioned. The contact between the wire in the sheath and partially wedge-shaped element is covered with the housing 22, and the aforementioned element and the sealing means are in the process of pressing the outer peripheral section 23 housing the 22 to the clamping ring, and partially pressing the peripheral portion of the shell 12 to the wall of the channel 21 and to the conductor 11, respectively.

Figure 1 shows the clamping ring 30 one building associated with the female contact element 31, which includes an axial pin contact element 32 associated with the holding ring 30 other housing 22.

In each case 22 has a peripheral groove 41 in which is placed a sealing ring 42, and the sealing sleeve 50 has two sealing rings 42, ensuring tightness. In order to ensure the axial obstacles, the sleeve 50 may be made of an annular groove 51 in which is located a sealing ring 42. At the ends of the sleeves can be made of an inner bevel, and the front parts of the channel 21 with respect to the input and routing cables 12 can be made of a facet.

As shown in figure 2, the connecting device can be used for cable 1, which contains a single conductor 11 is covered with the shell 12. As can be seen in figure 3, the pin contact element 32 and the female contact element 31 can be pliable in the radial direction to a certain extent, in order to establish an effective electrical connection. Pin contact element 32 and the female contact element 31 may be of a design which is what allows them to take a certain mutual position in the rotational direction when the connection.

As shown in figure 2, the housing 22 in the radial direction of the holding ring is compressed to the conductor 11 in the shell could get a good electrical contact with the pressure ring 30 and the wall of the channel 21 was in tight contact with the shell 12 around its perimeter, thereby preventing leakage of fluid through the channel 21 in the axial direction. In one embodiment, the cable 1 may be composed of several wires, as shown in figure 4, the conductor 11 in the membranes are placed in predetermined positions on the periphery or perimeter of the section 23, by bringing them into contact with the respective conductive parts 34, 35, 36 of the clamping ring 30. Since the pin contact element 32 and the female contact element 31 occupy a certain position in the rotational direction relative to each other, the conductive part 34, 36 female contact element 31 can be brought into conductive contact with the corresponding parts 34', 35', 36', located on the pin contact element 32.

In further elaboration of the invention, 6, clamping ring with pin contact formed of a metal element 70 disc shape, the edge portion 71 which corresponds to the clamping ring 30 and the lower portion 72 corresponds to the female contact 31. Due to the aforementioned clamping action elements is 70 may fit snugly to section 23 of the housing, while covering the end of the cable and covering the channel 21 in the housing. As you can see, there is another section 23 of the housing includes a tubular element 80, which also contains an electrically conductive material. In element 80 has an internal partition wall 81, which forms two opposite open cavity in the form of glasses, one of which covers the section 23 housing, and its edge part is made in accordance with the pressure ring 30 with the possibility of dense accommodation around the section 23 housing covering the said end of the cable and protecting the channel 21. Other cavity in the shape of the glass element 80 corresponds to the female contact 31.

As shown in Fig.6, the sleeve 50 may include two passing longitudinally of the tubular section 50', 50", which can be connected end-to-end to each other using a combined connection 54, which contains a sealing means, and means holding the sections together, for example, means in the form located on the periphery of one serving of a connecting part 56 of the flange 55, and the respective grooves 57 in the other connecting part 58. Combined connection can, if necessary, to tighten the metal clamping ring or clamping ring made of usagepage when heated plastic.

At the ends of the tubular sections 50', 50" can accommodate the annular flange 52 that pass p the ends of the housings 22, on the said combined connection 54, making it difficult to accidental pulling of electrical contacts 31, 32.

Annular flanges 52 can be replaced or to provide a tubular element 53 that protrudes from the sleeve and covers the cable 1 with a small gap. When the tubular element 53 is made of pliable material, it can be tightly compressed around the cable, for example, with the help of covering of the clamping ring 60, which is to perform mechanical pressing can be made of metal, or by shrinkage of the tubular element 53, if the element has the ability to heat shrinkage.

In another embodiment of the invention the housing 22 with the respective clamping rings and the electrical contacts may be the same, for example, as shown in the left side of Fig.6, where the sleeve 50"' is on both ends of the shape of the inner part, which is complementary to the shape of the perimeter of the housings 22, providing a seal on the said buildings. Sleeve 50"' is located inside the tubular conductor 88, to which suitable elements 70.

In the embodiments shown in figures 1 and 6, the cable has a single conductor 11 is covered with the shell 12 also has a section 23 of the shell which is coaxial to the casing 2. However, it is clear that the cable 1 can consist of several wires coated, each of whom shall meet the conductor 11 or any of its technical equivalent, you can keep the shell 12, each conductor 11 passes through the corresponding channel 21 and exits through the section 23 housing on which are fixed element 70, 80 in the form of a Cup or bowl, as shown in Fig.6.

As shown in Fig, the present invention can be applied to a connector that includes a housing 22, one end of which there is a channel 121 of larger size, which is fed into the cable 1. The cable may have a shell 122, which can be tightly pressed against the wall of the channel 121 via an external clamping ring 122 and covers the body. As seen on Fig, the cable has two wires, each of which passes through the corresponding channel and out through the corresponding section 23. The wires are covered at the end of the said section 23, having mainly the shape of the Cup sleeve 70, the edge of which is pressed against the wire with the shell, installing o-ring seal directly against the outer periphery of the section 23, on the one hand, and between the channel wall and the conductor and the like, on the other hand, as described above. Surrounding the shell 122 sets the peripheral seal between the cable sheath and the wall of the channel 121.

On Fig shows section 23, which is parallel from the housing 22, thus forming an electrical contact element of the type which can be used in Oba the nom output 220 V, in this case, the cable 1 has a shell that contains two conductors with shells, these shells are indicated by 12 positions.

Figure 9 shows a variant of the electrical contacts 70, 80. The difference between the options shown in figures 9 and 6, is that in the variant shown in Fig.9, the end of the conductor 11 is not bent back to the body 22, instead he goes straight forward (which may be necessary for high-frequency applications). For this reason, the electrical contact 70 has a narrow, mostly Cup-shaped female contact element 31', which also includes the end part of the wire in the sheath and which can be pressed to establish electrical contact with said wire. Electrical contact 80 is formed accordingly. Thus, the contact 80 has a narrow Central tubular extension part having the shape of a bowl, which includes section 23. In elongation is designata the end part of the conductor 11 in the shell, and it can be pressed to establish electric contact. The free end portion of the extension forms a female coupling element, which includes a male coupling element provided on the contact 70. The extension has a wall which seals and protects the channel in the extension.

Figure 10 presents vari the HT device, shown in Fig.9. The difference between the options presented on figures 9 and 10 essentially consists in that the housing 22, which is made of elastic plastic material, has an outer portion 28 with a relatively thin wall, and at its outer end portion, which is positioned outside of the sleeve 50 made passing axially slit 90, forming a tool that reduces the bending load acting on the cable 1. In addition, the narrow part of the channel 90 contact 70/80 (and mentioned in the part 90 is stripped end of the conductor 11 has a thick-walled part 92. Part 92, mostly made in one piece with the connector, or it may be made of a material of the connector, for example, metal, such as brass, beryllium bronze, etc. Channel 90 may have a square cross-section, for example, about 2.5 mm2and take the conductor 11 of the corresponding square cross-section (2.5 mm2). As part 92 has an increased wall thickness, it is possible to correctly connect the conductor 11 is significantly smaller, for example, having the cross-sectional area of 1.5 mm2by pressing the same contacts.

In one embodiment of the invention the ratio between the outer diameter and the inner diameter portion 92 may be about 2:1 to 6:1, preferably about 3:1-5:1, and becoming the public this ratio is rounded up is 4:1. Thus, due to the thickness of the wall of said section to provide proper clamping connection with the electrical contacts even relatively thin conductors 11.

The present invention is presented with reference to the sleeve, which contains and hermetically connects the two electrical contact 70/80, which contact each other within the sleeve 50. However, it is clear that essentially the sleeve may be formed by the housing of the connector, which includes channels, including a pair of electrical contacts 70/80. These channels can be screened by a wall, through which passes an electrical contact, and the ends of the contact elements are designed to be interoperable connecting elements 31/32 contacts 70/80. Sealed overlapping channel through the sleeve 50 can be ensured either by using a circular flange 98 on the electrical contact, which interacts with a corresponding circular groove 99 in the wall of the channel, passing through the sleeve 50, or by using a circular flange on the housing 22, which interacts with a corresponding groove or through the use of appropriate sealing rings.

When installing electrical contact 70/80 on one end of the cable end part of the conductor 11 bare, and the housing 22 is wound on the end of the cable. Then about the reindeer conductor 11 is introduced into channel 1, and some wire/cable, coated, injected into the end of the Cup-97 electrical contact with the section 23 of the housing 22. After that compresses the wall of the contact. Part of the walls, with mainly the shape of the Cup 97, compresses around the section 23 housing and the end portion of the cable 1 that is located in it. Then enter the electrical contact in the socket 50.

1. A connection device for a cable, comprising a housing (22), which has a through channel (21) for cable and in which the electrical contact (70), which has mainly the form of a bowl, placed over a section (23) of the said casing, the said channel (21) is in the above-mentioned section (23) of the housing, passing in the above-mentioned electrical contact having the shape of a bowl, and in which the conductor (11) in the shell is connected with the possibility of conduction with said electrical contact, wherein the electrical contact (70) tightly pressed around the mentioned section (23) of the body, and also the fact that the said section of casing made of an elastic material at least in the area of the clamp with sealing wall above the channel (21) relative to the outer periphery of the cable due to local pressure deformation.

2. The device according to claim 1, wherein each of the first and second cables (1) connected to the housing (22, each of which has a corresponding electrical contact (70, 80), while the electrical contact of one body provided with a female connecting element, and the electrical contact of the other of the housing is fitted with a male connecting element for the electrical conductive engagement with a female connector element, and a tubular sealing sleeve (50) is made with possibility of connection of the housings and seals around the periphery of the housings (22).

3. The device according to claim 2, wherein the male coupling element and a female coupling element are merged portions of the respective electrical contacts (70, 80)having a shape of a bowl.

4. Device according to any one of claims 1 to 3, characterized in that the tubular sealing sleeve (50) and each enclosure (22) are the elements (41, 42, 51) interactions, which are designed to ensure proper axial position in which the tubular sealing sleeve (50) is provided with a stepped resistance to axial displacement relative to the casing (22).

5. Device according to any one of claim 2 to 4, characterized in that the sleeve (50) includes two tubular longitudinal sections (50', 50"), which are made with the possibility of a connection between an axially with articulation (54), and each longitudinal section is at the end, udalen the m from the junction (54), the annular flange (52), which passes through the ends of the respective housing (22).

6. Device according to any one of claims 1 to 5, characterized in that the pin of the connecting element is formed electrical contact in the form of a bowl, the edge of which is clamped to a section of the body.

7. Device according to any one of pp.5-6, characterized in that the two longitudinal tubular section of the tubular sealing sleeve (50) is provided at the ends of the said sleeve tubular extensions, covering the relevant cables with a small gap with a sealed connection to a cable covering the holding ring.

8. Device according to any one of claims 1 to 7, characterized in that the guide consists of several or many wires, and thus the pressing bowls electrical contact provides radial compression of the conductor through the section (23) of the housing and the cable sheath, with the possibility of sealing said conductor and prevent the fluid in the axial direction.



 

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