CN110445088A - Cable intermediate head protective housing - Google Patents

Abstract

The invention relates to a protective shell of a cable intermediate joint, which has a first sealing component and a second sealing component with the same structure. The first sealing assembly is in sealing connection with the second sealing assembly. The connecting pipe of the first sealing assembly is provided with an inner thread, and the inner thread is used for matching with the outer thread of the metal sheath of the first cable. The two ends of the protective shell of the intermediate joint of the cable can be firmly connected with the metal sheath of the first cable and the metal sheath of the second cable, and the contact area is large and the on-resistance is small. The tightening flange of the first sealing assembly is used to cover the metal sheath of the first cable, and is set at the end of the sealing shell away from the connecting pipe, and the tightening flange is bolted to the second flange end to make the seal A sealing cavity is formed between the shell, the fastening flange, and the metal sheath of the first cable, and the sealing cavity is used for filling the sealing element. The sealing process of the present application is simple, and the on-site installation is not limited by the technical level of the operator.

Description

Cable intermediate connector protective shell

technical field

The invention relates to a cable joint sealing device, in particular to a cable intermediate joint protective shell.

Background technique

A protective shell is required on the outside of the main body of the intermediate cable joint. The protective shell must not only be reliably connected to the metal sheath of the cable, but also ensure that the structural level of the intermediate cable joint is similar to that of the cable to achieve metal shielding and mechanical protection functions. At the same time, it must be reliably sealed with the metal sheath to prevent external water vapor from entering the protective shell and causing the main body of the intermediate joint to fail and break down. At present, the protective shell of the intermediate joint of the cable mainly adopts the lead sealing process to realize the electrical connection and sealing structure with the metal sheath of the cable. However, the quality of the lead sealing process depends largely on the technical level of the staff and is easily affected by factors such as the installation operating environment, the lead sealing time, and the flame temperature of the spray gun, resulting in a low yield, which often occurs after the line has been running for a period of time. The lead seal of the protective shell falls off and the cable joints enter the water, and cracking is easy to occur, resulting in the failure of the cable joint seal.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a cable intermediate joint protective shell that is easy to install and disassemble, efficient and reliable in sealing, aiming at the above problems.

A cable intermediate joint protective shell, comprising: a first sealing component and a second sealing component with the same structure;

The first sealing assembly includes: a first sealing tube, a second sealing tube and a fastening flange;

The first sealing pipe includes a connecting end and a first flange end arranged opposite to each other, and the first flange end is used for sealingly connecting with the first flange end of the second sealing assembly;

The second sealing tube includes: a connecting tube and a sealing shell;

the connecting pipe, one end of the connecting pipe is fixedly connected with the connecting end, the connecting pipe is provided with an inner thread, and the inner thread is used for matching with the outer thread of the metal sheath of the first cable;

the sealing shell is connected with one end of the connecting pipe away from the connecting end, and one end of the sealing shell away from the connecting pipe is provided with a second flange end;

A fastening flange is used to cover the metal sheath of the first cable and is arranged on the end of the sealing shell away from the connecting pipe. The fastening flange is bolted to the second flange end. connection, so that a sealing cavity is formed between the sealing shell, the fastening flange and the metal sheath of the first cable, and the sealing cavity is used for filling the sealing element.

In one of the embodiments, the diameter of the sealing shell is larger than the diameter of the connecting pipe, and one end of the sealing shell that is connected to the connecting pipe is connected by a reducing structure.

In one embodiment, the sealing member includes a sealing ring, and the sealing ring is used to cover the metal sheath of the first cable and fill the sealing cavity.

In one of the embodiments, the sealing ring has an inclined surface for mating with the inner wall of the diameter reducing structure.

In one of the embodiments, it further includes a sealing gasket, sleeved on the cable intermediate joint, and sandwiched between the first flange end of the first sealing component and the first flange end of the second sealing component between.

In one embodiment, the sealing gasket is circumferentially spaced with a plurality of threaded holes for bolting with the first flange end of the first sealing assembly and the first flange end of the second sealing assembly connect.

In one of the embodiments, the peripheral edge of the fastening flange is provided with an annular protrusion for fixing the sealing member to the sealing cavity.

In one of the embodiments, a grounding device is further included, which is arranged on the outer surface of the first sealing tube.

In one embodiment, the fastening flange of the first sealing assembly and the fastening flange of the second sealing assembly are non-magnetic metal materials.

In one of the embodiments, a sealing groove is provided on the periphery of the first flange end of the first sealing pipe.

In one of the embodiments, the first sealing assembly further includes a sealing ring embedded in the sealing groove.

The cable intermediate joint protective shell provided in the present application has the first sealing assembly and the second sealing assembly with the same structure. The first sealing assembly is in sealing connection with the second sealing assembly. The connecting pipe of the first sealing assembly is provided with an inner thread, and the inner thread is used for matching with the outer thread of the metal sheath of the first cable. The two ends of the protective shell of the intermediate joint of the cable can be firmly connected with the metal sheath of the first cable and the metal sheath of the second cable. The fastening flange of the first sealing assembly is used to be sleeved on the metal sheath of the first cable, and is arranged at the end of the sealing shell away from the connecting pipe, and the fastening flange is connected to the The second flange ends are bolted, so that a sealing cavity is formed between the sealing shell, the fastening flange, and the metal sheath of the first cable, and the sealing cavity is used for filling the sealing element. The purpose of sealing the protective shell of the cable intermediate joint can be achieved by the sealing member, so the sealing process of the present application is simple, and the on-site installation is not limited by the technical level of the operator. Moreover, compared with the prior art, there is no need to seal the protective shell of the intermediate joint of the cable, the sealing ability is not affected by thermal expansion and contraction, and the sealing performance is durable and efficient.

Description of drawings

FIG. 1 is a schematic structural diagram of a protective shell of a cable intermediate joint according to an embodiment of the present invention.

FIG. 2 is a partial structural schematic diagram of a protective shell of a cable intermediate joint according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a sealing ring of a protective shell of a cable intermediate joint according to an embodiment of the present invention.

FIG. 4 is a front view of a fastening flange of a protective shell of a cable intermediate joint according to an embodiment of the present invention.

FIG. 5 is a side view of a fastening flange of a protective shell of a cable intermediate joint according to an embodiment of the present invention.

FIG. 6 is a front view of a sealing gasket of a protective shell of a cable intermediate joint according to an embodiment of the present invention.

FIG. 7 is a side view of a sealing gasket of a protective shell of a cable intermediate joint according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of the structure of the first flange end of the cable intermediate joint protective shell according to an embodiment of the present invention.

FIG. 9 is a schematic structural diagram of a sealing ring of a protective shell of a cable intermediate joint according to an embodiment of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIGS. 1 and 2 , a schematic structural diagram of a cable intermediate joint protective shell 10 in an embodiment of the present application, the cable intermediate joint protective shell 10 includes a first sealing assembly 100 and a second sealing assembly 200 with the same structure;

The first sealing assembly 100 includes a first sealing tube 110 , a second sealing tube 120 and a fastening flange 130 . The second sealing assembly 200 includes a first sealing tube 210 , a second sealing tube 220 and a fastening flange 230 . The structure and connection method of the second sealing assembly 200 are the same as those of the first sealing assembly 100 .

In one embodiment, the first sealing tube 110 of the first sealing assembly 100 is used to accommodate the cable intermediate joint 320 , and the diameter of the first sealing tube 110 is larger than the maximum diameter of the cable intermediate joint 320 . The second sealing tube 120 of the first sealing assembly 100 is sleeved on the metal protective shell 310 of the first cable, and is sealedly connected with the fastening flange 130 . The first sealing tube 210 of the second sealing assembly 200 is used for accommodating the intermediate cable joint 320 , and the diameter of the first sealing tube 210 is larger than the maximum diameter of the intermediate cable joint 320 . The second sealing tube 220 of the second sealing assembly 200 is sleeved on the metal protective shell 310 of the first cable, and is sealedly connected with the fastening flange 230 of the second sealing assembly 200 . The cable intermediate joint 320 is sealed by the cable intermediate joint protective shell 10. According to the technical solution of the present application, the cable intermediate joint protective shell 10 is easy to package or disassemble, and is convenient for maintenance.

In one embodiment, the diameter of the first sealing tube 110 is larger than the diameter of the second sealing tube 120 . So that the first sealing tube 110 is matched with the cable intermediate joint 320 , and the second sealing tube 120 is matched with the metal protective shell 310 of the first cable and the fastening flange 130 . Therefore, the cable intermediate joint protective shell 10 of the present application has a simple structure and low manufacturing cost.

The first sealing tube 110 of the first sealing assembly 100 includes a connecting end 111 and a first flange end 113 that are oppositely disposed. The first flange end 113 is a flange structure with a plurality of threaded holes evenly spaced in the circumferential direction. The threaded holes are matched with the threaded holes of the first flange end 213 of the second sealing assembly 200 , so that the first flange end 113 of the first sealing assembly 100 and the second sealing assembly 200 The first flange end 213 is connected by bolts.

The second sealing tube 120 of the first sealing assembly 100 includes a connecting tube 121 and a sealing shell 123 . The connecting pipe 121 is a tubular structure. The inner surface of the connecting pipe 121 is provided with an inner thread, and the inner thread is used for matching with the outer thread of the metal sheath 310 of the first cable to connect the second sealing pipe 120 to the metal sheath of the first cable. 310 thread connection. The second sealing tube 220 of the second sealing assembly 200 also includes a connecting tube 221 and a sealing shell 223 . The connecting pipe 221 is a tubular structure. The inner surface of the connecting pipe 221 is provided with an inner thread, and the inner thread is used for matching with the outer thread of the metal sheath 330 of the second cable, so as to connect the second sealing pipe 120 of the second sealing assembly 200 to the second sealing pipe 120 of the second cable. And the metal sheath of the cable is 330 threaded connection. In this technical solution, the two ends of the cable intermediate joint protective shell 10 are directly connected with the metal sheath 310 of the first cable and the metal sheath 330 of the second cable by screwing, so that the three are in contact with each other. Large area and low on-resistance. Therefore, there is no need to perform additional conductive connection between the cable intermediate joint protective shell 10 and the metal sheath 310 of the first cable and the metal sheath 330 of the second cable. In addition, by adopting the threaded connection method, the cable intermediate joint protective shell 10 can be firmly connected with the metal sheath 310 of the first cable and the metal sheath 330 of the second cable, which is easy to install and has good stability. .

One end of the connecting pipe 121 is fixedly connected with the connecting end 111 , so that the first sealing pipe 110 and the second sealing pipe 120 are tightly connected. In one embodiment, the first sealing tube 110 and the second sealing tube 120 are integrally formed. The sealing shell 123 includes opposite ends, and one end is connected to the end of the connecting pipe 121 away from the connecting end 111 . A second flange end 1231 is provided at one end of the sealing shell 123 away from the connecting pipe 121 . The second flange end 1231 is a flange structure with a plurality of threaded holes evenly spaced in the circumferential direction. The threaded holes are matched with the threaded holes of the fastening flange 130 , so that the second flange end 1231 of the first sealing assembly 100 is connected with the fastening flange 130 by bolts. The on-site assembly is convenient and the work efficiency is high, which is beneficial to the later maintenance of the protective shell 10 of the intermediate joint of the cable.

Referring to FIGS. 4 and 5 , the fastening flange 130 of the protective shell of the cable intermediate joint according to an embodiment of the present application, the fastening flange 130 of the first sealing component is sleeved on the metal protective shell of the first cable The sleeve 310 is disposed at the end of the sealing shell 123 away from the connecting pipe 121 . The fastening flange 130 is circumferentially spaced with a plurality of threaded holes, and the fastening flange 130 and the second flange end 1231 are connected by bolts. A sealing cavity 133 is formed between the sealing shell 123 , the fastening flange 130 , and the metal sheath 310 of the first cable. The sealing cavity 133 is used to fill the sealing member 140 . The fastening flange 230 of the second sealing assembly has the same structure and connection mode as the fastening flange 130 of the first sealing assembly. Through the above connection manner, the sealing between the cable intermediate joint protective shell 10 and the metal sheath 310 of the first cable and the metal sheath 330 of the second cable is achieved. The sealing process of the technical solution is simple, and the on-site installation is not limited by the technical level of the operator. Moreover, compared with the prior art, there is no need to seal the cable intermediate joint protective shell 10 with lead, the sealing ability is not affected by thermal expansion and cold contraction, and the sealing performance is durable and efficient.

Referring to FIG. 2 , in one embodiment, the inner diameter of the sealing shell 123 is larger than the inner diameter of the connecting pipe 121 . In this embodiment, one end of the variable diameter structure 125 having a smaller inner diameter is connected to the connecting pipe 121 . One end of the variable diameter structure 125 having a larger inner diameter is connected to the opposite end of the second flange end 1231 of the connecting pipe 121 .

Referring to FIG. 3 , a schematic structural diagram of a sealing ring 141 of a protective shell of an intermediate cable joint according to an embodiment of the present application, in one embodiment, the sealing member 140 of the first sealing assembly 100 includes a sealing ring 141 . The sealing ring 141 is sleeved on the metal sheath 310 of the first cable. The sealing ring is disposed in the sealing cavity 133 for sealing the first sealing assembly 100 and the metal sheath 310 of the first cable, thereby preventing the protective shell 10 of the intermediate cable joint from falling off and water entering . Specifically, the sealing ring 141 is an annular structure. The inner diameter of the sealing ring 141 is matched with the metal sheath 310 of the first cable. The sealing ring 141 has an inclined surface 142 , and the inclined surface 142 is matched with the inner wall of the variable diameter structure 125 . The surface of the sealing ring 141 opposite to the inclined surface 142 is fitted with the fastening flange 130 . So that the sealing ring 141 is sealed in the sealing cavity 133 and fixed between the diameter reducing structure 125 and the fastening flange 130 . Through the sealing manner in which the sealing ring 141 is arranged in the sealing cavity 133 , the sealing process is simple and the sealing ability is good. When the cable intermediate joint protective shell 10 is installed or disassembled, it is not necessary to use flame to connect the cable intermediate joint protective shell 10 with the metal sheath 310 of the first cable and the metal sheath 330 of the second cable. Conduct lead melting or lead sealing operations. The metal sheath 310 of the first cable and the metal sheath 330 of the second cable do not overheat due to long-term lead sealing or lead melting operations. The cable bodies in the metal sheath 310 of the first cable and the metal sheath 330 of the second cable will not be thermally damaged due to the installation or removal of the cable intermediate joint protective shell 10 .

Referring to FIG. 6 and FIG. 7 , the front view of the sealing gasket 400 of the cable intermediate joint protective shell according to an embodiment of the present application, in an embodiment of the present application, the cable intermediate joint protective shell 10 further includes the sealing gasket 400 , which is sleeved on the cable intermediate joint 320 and sandwiched between the first flange end 113 of the first sealing assembly 100 and the first flange end 213 of the second sealing assembly 200 . In order to connect the first sealing assembly 100 with the second sealing assembly 200 in butt connection. The structure of the cable intermediate joint protective shell 10 is formed, and the cable intermediate joint 320, the metal sheath 310 of the first cable and the metal sheath 330 of the second cable are covered. The cable intermediate joint 320, the metal sheath 310 of the first cable and the metal sheath 330 of the second cable are integrally sealed in the shell of the cable intermediate joint protective shell 10 to avoid being exposed to water vapor and debris. influences.

In an embodiment of the present application, the sealing gasket 400 is provided with a plurality of threaded holes 410 at intervals in the circumferential direction, for connecting with the first flange end 113 of the first sealing assembly 100 and the second sealing assembly 200 The first flange end 213 is bolted. The technical solution of the present application adopts bolts for fastening and installation, which is convenient for on-site installation and disassembly.

Referring to FIG. 4 and FIG. 5 , in an embodiment of the present application, the peripheral edge of the fastening flange 130 is provided with an annular protrusion 135 . The annular protrusion 135 is in close contact with the inclined surface 142 of the sealing ring 141 . The annular protrusion 135 fastens the sealing ring 141 in the sealing cavity 133, so that the first sealing assembly 100 and the metal sheath 310 of the first cable can better fit closely together, Good sealing effect.

In one embodiment, the fastening flange 130 is a non-magnetic metal material.

Referring to FIG. 8 , a schematic structural diagram of the first flange end 113 of the cable intermediate joint protective shell according to an embodiment of the present application. A sealing groove 1131 is provided. The sealing groove 1131 is an annular groove for filling the sealing element.

In order to achieve a better sealing effect, in an embodiment of the present application, the first sealing assembly 100 further includes a sealing ring 160 . Referring to FIG. 9 , a schematic structural diagram of the sealing ring 160 of the cable intermediate joint protective shell according to an embodiment of the present application, the sealing ring 160 is an annular structure, and the size of the sealing ring 160 is matched with the sealing groove 1131 , so that the The sealing ring 160 can be inserted into the sealing groove 1131 .

In an embodiment of the present application, the first sealing assembly 100 further includes a grounding device 150 disposed on the outer surface of the first sealing tube 110 . Likewise, the second sealing assembly 200 further includes a grounding device 250 disposed on the outer surface of the first sealing tube 210 . The ground of the first sealing assembly 100 is used for ground connection, so that the induced voltage of the metal sheath 310 of the first cable is not too large, and the induced current of the metal sheath 310 of the first cable is balanced.

In an embodiment of the present application, the installation method of the cable intermediate joint protective shell 10 is as follows:

The fastening flange 130 , the sealing ring 140 , the second sealing tube 120 , the first sealing tube 110 , the sealing ring 160 and the sealing gasket 400 of the first sealing assembly 100 are sequentially sleeved into the metal sheath of the first cable. Set of 310. The fastening flange 230 , the sealing ring 240 , the second sealing tube 220 , the first sealing tube 210 and the sealing ring 260 of the second sealing assembly 200 are sequentially sheathed into the metal sheath 330 of the second cable.

Insert the sealing ring 160 of the first sealing assembly 100 into the sealing groove 1131 of the first sealing tube 110 of the first sealing assembly 100 .

The sealing ring 140 of the first sealing assembly 100 is placed in the sealing shell 123 of the second sealing tube 120 . The opposite end of the inclined surface 142 is matched with the fastening flange 130 .

Connect the fastening flange 130 to the second flange end 1231 of the second sealing tube 120 with bolts;

The second sealing assembly 200 is connected in the same manner as the first sealing assembly 100 .

The first sealing tube 210 of the first sealing assembly 100 is connected to one end of the sealing gasket 400 by bolts, and the first sealing tube 210 of the second sealing assembly 200 is connected to the sealing gasket 400 at the other end. Connect at one end. In order to complete the overall sealing and installation of the cable intermediate joint protective shell 10 .

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (11)

1. A cable intermediate joint protective shell, characterized in that it comprises: a first sealing assembly (100) and a second sealing assembly (200) having the same structure; The first sealing assembly (100) includes: The first sealing tube (110) includes a connecting end (111) and a first flange end (113) arranged opposite to each other, and the first flange end (113) is used for connecting with the second sealing assembly (200). The first flange end (213) is sealed and connected; The second sealing tube (120) includes: A connecting pipe (121), one end of the connecting pipe (121) is fixedly connected with the connecting end (111), the connecting pipe (121) is provided with an inner thread, and the inner thread is used for connecting with the metal of the first cable The outer thread of the sheath (310) is matched; The sealing shell (123) is connected to the end of the connecting pipe (121) away from the connecting end (111), and the end of the sealing shell (123) away from the connecting pipe (121) is provided with a second flange end (1231); A fastening flange (130) is used to cover the metal sheath (310) of the first cable, and is arranged on the end of the sealing shell (123) away from the connecting pipe (121), and the fastening flange (121) is The fastening flange (130) is bolted to the second flange end (1231), so that the sealing shell (123), the fastening flange (130), the metal sheath ( A sealing cavity (133) is formed between 310), and the sealing cavity (133) is used for filling the sealing element (140). 2. The cable intermediate joint protective shell according to claim 1, characterized in that, the diameter of the sealing shell (123) is larger than the diameter of the connecting pipe (121), and the sealing shell (123) is connected to the The connected end of the pipe (121) is connected by a variable diameter structure (125). 3. The cable intermediate joint protective shell according to claim 2, characterized in that, the sealing member (140) comprises a sealing ring (141), and the sealing ring (141) is used to be sleeved on the first cable metal sheath (310). 4. The cable intermediate joint protective shell according to claim 3, characterized in that, the sealing ring (141) has an inclined surface (142) for mating with the inner wall of the diameter reducing structure (125). 5. The protective shell of the intermediate cable joint according to claim 1, characterized in that it further comprises a sealing gasket (400), sleeved on the intermediate cable joint (320), and sandwiched between the first sealing assembly (100) ) between the first flange end (113) of the second sealing assembly (200) and the first flange end (213) of the second sealing assembly (200). 6. The cable intermediate joint protective shell according to claim 5, wherein a plurality of threaded holes (410) are arranged at circumferential intervals on the sealing gasket (400) for connecting with the first sealing assembly (100). The first flange end (113) of ) and the first flange end (213) of the second sealing assembly (200) are bolted. 7. The cable intermediate joint protective shell according to claim 1, wherein an annular protrusion (135) is provided on the periphery of the fastening flange (130) for fixing the sealing member to the The sealed cavity (133) is described. 8. The cable intermediate joint protective shell according to claim 1, characterized in that, further comprising a grounding device (150) disposed on the outer surface of the first sealing tube (110). 9. The cable intermediate joint protective shell according to claim 1, characterized in that, the fastening flange (130) of the first sealing assembly (100) and the fastening method of the second sealing assembly (200) The blue (230) is a non-magnetic metal material. 10. The cable intermediate joint protective shell according to claim 1, wherein a sealing groove (1131) is provided on the periphery of the first flange end (113) of the first sealing tube (110). 11. The cable intermediate joint protective shell according to claim 10, wherein the first sealing assembly (100) further comprises a sealing ring (160), and the sealing ring (160) is embedded in the sealing groove (160). 1131).