A multi-functional explosion-proof cable connector that can be connected to an electromagnetic shielding protective tube.

Abstract

The present invention discloses a multifunctional explosion-proof cable joint that can be connected to an anti-electromagnetic shielding protective tube, comprising: a main joint; a nut, the nut is threadedly connected to the main joint; a protective hose, the protective hose is sleeved on the outside of the cable and extends to the inside of the main joint, the protective hose is a plastic-coated metal hose; an electromagnetic shielding structure, the electromagnetic shielding structure is arranged inside the main joint, the electromagnetic shielding structure comprises a metal braided mesh sleeve, the metal braided mesh sleeve is in contact with the metal hose inside the protective hose, the metal braided mesh sleeve is also in contact with the inner wall of the main joint, and a protective body with electromagnetic shielding interference is formed between the main joint, the metal braided mesh sleeve and the protective hose.

Description

Technical Field

[0001] The invention relates to the technical field of cable protection joints, and in particular to a multifunctional explosion-proof cable joint which can be connected to an anti-electromagnetic shielding protection tube. Background Art

[0002] Cable joints are also called cable heads. After the cable is laid, in order to make it a continuous line, each section of the line must be connected as a whole. These connection points are called cable joints. The cable joint in the middle of the cable line is called the intermediate joint, and the cable joints at both ends of the line are called terminal heads. Cable joints are used to lock and fix the incoming and outgoing lines, and play a role in waterproofing, dustproofing and vibration prevention.

[0003] The existing cable joint structure is too simple. In some special environments, the traditional cable joint has poor sealing performance, dust is easy to enter, and static electricity is easy to generate in a relatively dry environment, which can easily lead to safety accidents. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a multifunctional explosion-proof cable connector which can be connected to an anti-electromagnetic shielding protection tube.

[0005] The present invention is achieved by the following technical solutions:

[0006] A multifunctional explosion-proof cable connector that can be connected to an anti-electromagnetic shielding protective tube, comprising: a main connector; a nut, the nut is threadedly connected to the main connector; a protective hose, the protective hose is sleeved on the outside of the cable and extends to the inside of the main connector, the protective hose is a plastic-coated metal hose; an electromagnetic shielding structure, the electromagnetic shielding structure is arranged inside the main connector, the electromagnetic shielding structure includes a metal braided mesh sleeve, the metal braided mesh sleeve is in contact with the metal hose inside the protective hose, the metal braided mesh sleeve is also in contact with the inner wall of the main connector, and the main connector, the metal braided mesh sleeve and the protective hose form a protective body with electromagnetic shielding interference.

[0007] The present invention is further configured as follows: the metal hose inside the protective hose is a stainless steel metal braided hose, and the outside of the stainless steel metal braided hose is covered with a PVC hose.

[0008] The present invention is further configured as follows: the surface of the PVC hose has a notch end, the notch end is located inside the main joint, and the metal braided mesh sleeve is in contact with the stainless steel metal braided hose inside the notch end.

[0009] The present invention is further configured as follows: the electromagnetic shielding structure includes, from left to right, a sealing ring 1, a tightening block, a sealing ring 2 and a mesh tightening structure, and the metal braided mesh is arranged inside the mesh tightening structure.

[0010] The present invention is further configured as follows: the sealing ring 1 and the tightening block are both sleeved on the outside of the cable and in contact with the inner wall of the main joint; the sealing ring 2 and the mesh tightening structure are both sleeved on the outside of the protective hose and in contact with the inner wall of the main joint.

[0011] The present invention is further configured as follows: the main joint has a first cavity and a second cavity connected to the first cavity, the first cavity is located on the left side of the second cavity, the first cavity and the second cavity are both circular cavities, and the diameter of the first cavity is smaller than the diameter of the second cavity;

[0012] The sealing ring 1 is located in the first cavity, and the tightening block, the sealing ring 2 and the mesh tightening structure are all located in the second cavity.

[0013] The present invention is further configured as follows: the sealing ring 1 and the sealing ring 2 are both made of rubber material, the sealing ring 1 and the sealing ring 2 are both cylindrical, and the outer middle parts of the sealing ring 1 and the sealing ring 2 are both provided with a U-shaped groove;

[0014] The first sealing ring has a first through hole inside for the cable to pass through, and the outer wall of the first sealing ring is the same as the inner diameter of the first cavity; the second sealing ring has a second through hole inside for the protective hose to pass through, and the outer wall of the second sealing ring is the same as the inner diameter of the second cavity.

[0015] The present invention is further configured as follows: the tightening block is made of rubber, and includes a first end body and a second end body, the first end body and the second end body are both cylindrical, and a third through hole for the cable to pass through is penetrated inside the first end body and the second end body, the diameter of the first end body is the same as the diameter of the sealing ring 1, the diameter of the second end body is the same as the inner diameter of the second cavity, the first end body is located on the side close to the sealing ring 1, and the second end body is located on the side close to the sealing ring 2.

[0016] The present invention is further configured as follows: the metal braided mesh sleeve is in a hollow truncated cone shape and has openings at both ends; the metal braided mesh sleeve has an inner turn-up edge on a side close to the stainless steel metal braided hose, and the metal braided mesh sleeve has an outer turn-up edge on a side away from the stainless steel metal braided hose; the inner turn-up edge contacts the stainless steel metal braided hose, and the outer turn-up edge contacts the inner wall of the main joint;

[0017] The side wall of the metal braided mesh sleeve is also evenly provided with a plurality of through holes, and the through holes are arranged obliquely.

[0018] The present invention is further configured as follows: the mesh sleeve breaking structure includes a breaking piece 1 and a breaking piece 2, both of which are made of rubber, the breaking piece 2 is located on the side close to the nut, and the breaking piece 1 is located on the side close to the main joint, the side wall of the metal woven mesh sleeve is clamped between the breaking piece 1 and the breaking piece 2, and the outer flange and the inner flange of the metal woven mesh sleeve both extend to the outside of the breaking piece 1 and the breaking piece 2.

[0019] The present invention discloses a multifunctional explosion-proof cable connector which can be connected to an anti-electromagnetic shielding protection tube. Compared with the prior art:

[0020] 1. One set of sealing rings is installed on the outside of the cable, and the second set of sealing rings is installed on the outside of the protective hose. While achieving the sealing of the inner wall of the cable joint, it can also ensure that the cable and metal hose inside the cable joint will not shake easily, thereby improving stability;

[0021] 2. The inner wall of the main joint, the metal braided mesh sleeve and the protective hose form a protective body with electromagnetic shielding interference, and the superposition effect forms a good electromagnetic conduction function;

[0022] 3. When the mesh sleeve breaking structure is compressed, the metal braided mesh sleeve is broken by the extrusion of the breaking piece 1 and the breaking piece 2, so that the metal braided mesh sleeve contacts the inner wall of the main joint. The mesh sleeve breaking structure can play a shielding and tensile resistance effect to prevent falling off;

[0023] 4. It plays a good role in static conduction and elimination in the case of flammable and explosive dust and dense space. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the external structure of the present invention.

[0025] Figure 2 It is a cross-sectional view of the present invention.

[0026] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0027] Figure 4 for Figure 3 Exploded diagram.

[0028] Figure 5 for Figure 4 Enlarged view of side A.

[0029] Figure 6 It is a cross-sectional view of the main joint of the present invention.

[0030] Figure 7 It is a schematic structural diagram of the metal braided mesh sleeve of the present invention.

[0031] The numbers and letters in the figure represent the corresponding component names:

[0032] Among them: 10, main joint; 20, nut; 30, protective hose; 40, cable; 50, electromagnetic shielding structure; 101, first cavity; 102, second cavity; 301, stainless steel metal braided hose; 302, PVC hose; 303, notched end; 501, metal braided mesh; 502, sealing ring 1; 503, breaking block; 504, sealing ring 2; 505, mesh breaking structure; 501a, inner flange; 501b, outer flange; 501c, through hole. DETAILED DESCRIPTION

[0033] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0034] like Figures 1 to 7 As shown, the present invention discloses a multifunctional explosion-proof cable connector that can be connected to an anti-electromagnetic shielding protection tube, comprising: a main connector 10; a nut 20, the nut 20 is threadedly connected to the main connector 10; a protective hose 30, the protective hose 30 is sleeved on the outside of the cable 40 and extends to the inside of the main connector 10, and the protective hose 30 is a plastic-coated metal hose; an electromagnetic shielding structure 50, the electromagnetic shielding structure 50 is arranged inside the main connector 10, the electromagnetic shielding structure 50 includes a metal braided mesh sleeve 501, the metal braided mesh sleeve 501 is in contact with the metal hose inside the protective hose 30, and the metal braided mesh sleeve 501 is also in contact with the inner wall of the main connector 10, and the main connector 10, the metal braided mesh sleeve 501 and the protective hose 30 constitute a protective body with electromagnetic shielding interference.

[0035] In the above technical solution, by sleeved the protective hose 30 on the outside of the cable 40, the cable 40 will not be exposed to the outside, which can greatly extend the service life of the cable 40; the protective hose 30 is sleeved to the outside of the cable 40 and extended into the main connector 10, and then the nut 20 is tightened. At this time, an electromagnetic shielding interference body is formed between the inner wall of the main connector 10, the metal braided mesh sleeve 501 and the protective hose 30, and the superposition effect forms a good electromagnetic conduction function.

[0036] Combination Figure 2 As shown, the metal hose inside the protective hose 30 is a stainless steel metal braided hose 301 , and the outside of the stainless steel metal braided hose 301 is covered with a PVC hose 302 .

[0037] In the above technical solution, the protective hose 30 is a plastic-coated metal hose. The metal hose inside the protective hose 30 of the present invention is preferably a stainless steel metal braided hose 301 and is coated with a PVC hose on the outside. It is worth noting that the metal hose inside the protective hose 30 can also be other metal hoses, which will not be elaborated in this article.

[0038] Combination Figure 2 As shown, the surface of the PVC hose 302 has a notch end 303 , and the notch end 303 is located inside the main joint 10 . The metal braided mesh sleeve 501 is in contact with the stainless steel metal braided hose 301 inside the notch end 303 .

[0039] In the above technical solution, the notch end 303 on the surface of the PVC hose 302 is to expose the stainless steel metal braided hose 301 outside the PVC hose 302, so as to facilitate contact with the metal braided mesh sleeve 501, so that the main joint 10, the metal braided mesh sleeve 501 and the protective hose 30 form a protective body with electromagnetic shielding interference; and the notch end 303 is located inside the main joint 10, so as to avoid the influence of moisture and dust.

[0040] Combination Figures 2 to 7 As shown, the electromagnetic shielding structure 50 includes a sealing ring 1 502, a tightening block 503, a sealing ring 2 504 and a mesh tightening structure 505 from left to right, and the metal braided mesh 501 is arranged inside the mesh tightening structure 505; the sealing ring 1 502 and the tightening block 503 are both sleeved on the outside of the cable 40 and in contact with the inner wall of the main joint 10; the sealing ring 2 504 and the mesh tightening structure 505 are both sleeved on the outside of the protective hose 30 and in contact with the inner wall of the main joint 10; the main joint 10 has a first cavity 101 and a second cavity 102 connected to the first cavity 101, the first cavity 101 is located on the left side of the second cavity 102, the first cavity 101 and the second cavity 102 are both circular cavities, and the first cavity 10 1 has a diameter smaller than that of the second cavity 102; the sealing ring 1 502 is located in the first cavity 101, and the breaking block 503, the sealing ring 2 504 and the mesh breaking structure 505 are all located in the second cavity 102; the sealing ring 1 502 and the sealing ring 2 504 are both made of rubber material, and the sealing ring 1 502 and the sealing ring 2 504 are both cylindrical, and the outer middle parts of the sealing ring 1 502 and the sealing ring 2 504 are both annularly provided with a U-shaped groove; the interior of the sealing ring 1 502 has a first through hole for the cable 40 to pass through, and the outer wall of the sealing ring 1 502 is the same as the inner diameter of the first cavity 101; the interior of the sealing ring 2 504 has a second through hole for the protective hose 30 to pass through, and the outer wall of the sealing ring 2 504 is the same as the inner diameter of the second cavity 102.

[0041] In the above technical solution, the design of the U-shaped groove at the sealing ring 1 502 and the sealing ring 2 504 can make the sealing ring 1 502 and the sealing ring 2 504 deform during the extrusion process, thereby sealing the interior, which can isolate moisture, dust, etc. to a large extent. The sealing ring 1 502 is located in the first cavity 101 to achieve preliminary internal environmental sealing, and the sealing ring 2 504 is located in the second cavity 102 to further seal the internal environment.

[0042] The present invention is further configured as follows: the tightening block 503 is made of rubber, and the tightening block 503 includes a first end body and a second end body, both of which are cylindrical, and the interiors of the first end body and the second end body are penetrated by a third through hole for the cable 40 to pass through, the diameter of the first end body is the same as the diameter of the sealing ring 1 502, the diameter of the second end body is the same as the inner diameter of the second cavity 102, the first end body is located on the side close to the sealing ring 1 502, and the second end body is located on the side close to the sealing ring 2 504.

[0043] Combination Figures 1 to 6 As shown, the metal braided mesh sleeve 501 is in the shape of a hollow truncated cone and has openings at both ends. The side of the metal braided mesh sleeve 501 close to the stainless steel metal braided hose 301 has an inner flange 501a, and the side of the metal braided mesh sleeve 501 away from the stainless steel metal braided hose 301 has an outer flange 501b, the inner flange 501a is in contact with the stainless steel metal braided hose 301, and the outer flange 501b is in contact with the inner wall of the main joint 10;

[0044] The side wall of the metal braided mesh sleeve 501 is also evenly provided with a plurality of through holes 501c, and the through holes 501c are arranged obliquely.

[0045] In the above technical solution, the inner flange 501a of the metal braided mesh sleeve 501 is used to contact the stainless steel metal braided hose inside the protective hose 30, and the outer flange 501b of the metal braided mesh sleeve 501 contacts the inner wall of the main joint 10 when passing through the mesh sleeve breaking structure 505 and the breaking block 503, and the setting of the metal braided mesh sleeve 501 can play a good shielding and tensile resistance effect.

[0046] The present invention is further configured as follows: the mesh sleeve breaking structure 505 includes a breaking piece 505a and a breaking piece 505b, both of which are made of rubber, the breaking piece 505b is located on the side close to the nut 20, and the breaking piece 505a is located on the side close to the main joint 10, the side wall of the metal braided mesh sleeve 501 is clamped between the breaking piece 505a and the breaking piece 505b, and the outer flange 501b and the inner flange 501a of the metal braided mesh sleeve 501 both extend to the outside of the breaking piece 505a and the breaking piece 505b.

[0047] In the above technical solution, the first breaking member 505a and the second breaking member 505b form an inner tapered mother-and-child part, and the first breaking member 505a includes a first component and a second component, both of which are cylindrical, and the first component and the second component are penetrated by a fourth through hole inside, and the fourth through hole is used for the PVC hose 302 outside the protective hose 30 to pass through, the diameter of the first component is greater than the diameter of the second component, the length of the first component is less than the length of the second component, and the outer side wall of the second component is an inclined surface, and the outer side wall of the second component is connected to the outer side wall of the second component. The inner wall of the metal woven mesh sleeve 501 is adapted to each other, the first component is located on the side away from the nut 20, and the second component is located on the side close to the nut 20; the second breaking member 505b includes a third component, the third component is cylindrical, and a fifth through hole penetrates the third component. The fifth through hole of the third component is a trapezoidal through hole when viewed from the cross section, and the inner wall of the third component is arranged parallel to the outer wall of the second component, and the third component is located on the side close to the nut 20; when viewed from the cross section, a Z-shaped channel is formed between the breaking member 1 303a and the breaking member 2 303b.

[0048] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A multifunctional explosion-proof cable connector that can be connected to an anti-electromagnetic shielding protection tube, characterized in that: include: Main connector (10); A nut (20), wherein the nut (20) is threadedly connected to the main joint (10); A protective hose (30), the protective hose (30) being sleeved on the outside of the cable (40) and extending into the inside of the main joint (10), the protective hose (30) being a plastic-coated metal hose; An electromagnetic shielding structure (50), the electromagnetic shielding structure (50) being arranged inside the main connector (10), the electromagnetic shielding structure (50) comprising a metal braided mesh sleeve (501), the metal braided mesh sleeve (501) being in contact with the metal hose inside the protective hose (30), the metal braided mesh sleeve (501) also being in contact with the inner wall of the main connector (10), the main connector (10), the metal braided mesh sleeve (501) and the protective hose (30) forming a protective body having electromagnetic shielding interference; The metal hose inside the protective hose (30) is a stainless steel metal braided hose (301), and the outside of the stainless steel metal braided hose (301) is coated with a PVC hose (302); The surface of the PVC hose (302) has a notch end (303), the notch end (303) is located inside the main joint (10), and the metal braided mesh sleeve (501) is in contact with the stainless steel metal braided hose (301) inside the notch end (303); The electromagnetic shielding structure (50) comprises, from left to right, a sealing ring 1 (502), a tightening block (503), a sealing ring 2 (504) and a mesh tightening structure (505), wherein the metal braided mesh (501) is arranged inside the mesh tightening structure (505); The sealing ring 1 (502) and the tightening block (503) are both sleeved on the outside of the cable (40) and in contact with the inner wall of the main joint (10); the sealing ring 2 (504) and the mesh tightening structure (505) are both sleeved on the outside of the protective hose (30) and in contact with the inner wall of the main joint (10); The main joint (10) has a first cavity (101) and a second cavity (102) connected to the first cavity (101), the first cavity (101) is located on the left side of the second cavity (102), the first cavity (101) and the second cavity (102) are both circular cavities, and the diameter of the first cavity (101) is smaller than the diameter of the second cavity (102); The sealing ring 1 (502) is located in the first cavity (101), and the tightening block (503), the sealing ring 2 (504) and the mesh tightening structure (505) are all located in the second cavity (102); The sealing ring 1 (502) and the sealing ring 2 (504) are both made of rubber material, and the sealing ring 1 (502) and the sealing ring 2 (504) are both cylindrical, and the outer middle parts of the sealing ring 1 (502) and the sealing ring 2 (504) are both provided with a U-shaped groove; The first sealing ring (502) has a first through hole inside for the cable (40) to pass through, and the outer wall of the first sealing ring (502) is the same as the inner diameter of the first cavity (101); the second sealing ring (504) has a second through hole inside for the protective hose (30) to pass through, and the outer wall of the second sealing ring (504) is the same as the inner diameter of the second cavity (102); The tightening block (503) is made of rubber, and comprises a first end body and a second end body, the first end body and the second end body are both cylindrical, a third through hole for the cable (40) to pass through is penetrated inside the first end body and the second end body, the diameter of the first end body is the same as the diameter of the sealing ring 1 (502), the diameter of the second end body is the same as the inner diameter of the second cavity (102), the first end body is located on the side close to the sealing ring 1 (502), and the second end body is located on the side close to the sealing ring 2 (504); The metal braided mesh sleeve (501) is in the shape of a hollow truncated cone and has openings at both ends. The side of the metal braided mesh sleeve (501) close to the stainless steel metal braided hose (301) has an inner flange (501a), and the side of the metal braided mesh sleeve (501) away from the stainless steel metal braided hose (301) has an outer flange (501b), the inner flange (501a) is in contact with the stainless steel metal braided hose (301), and the outer flange (501b) is in contact with the inner wall of the main joint (10); The side wall of the metal braided mesh sleeve (501) is also evenly provided with a plurality of through holes (501c), and the through holes (501c) are arranged obliquely; The mesh sleeve breaking structure (505) comprises a breaking piece 1 (505a) and a breaking piece 2 (505b), wherein the breaking piece 1 (505a) and the breaking piece 2 (505b) are both made of rubber material, the breaking piece 2 (505b) is located on a side close to the nut (20), and the breaking piece 1 (505a) is located on a side close to the main joint (10), and the side wall of the metal braided mesh sleeve (501) is sandwiched between the breaking piece 1 (505a) and the breaking piece 2 (505b), and the outer flange (501b) and the inner flange (501a) of the metal braided mesh sleeve (501) both extend to the outside of the breaking piece 1 (505a) and the breaking piece 2 (505b).

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