Flexible winding explosion-proof cable

Abstract

The utility model discloses a flexible winding explosion-proof cable, which comprises a cable core arranged inside the explosion-proof cable, a waterproof and moisture-proof layer is wrapped outside the cable core, a reinforcing core is inserted between the waterproof and moisture-proof layer and the cable core, a metal braided shielding layer is wrapped outside the waterproof and moisture-proof layer, and a flexible winding layer is arranged outside the metal braided shielding layer. The outer side of the metal braided shielding layer is wrapped with a fireproof layer, the outer side of the fireproof layer is wrapped with an insulating protection layer, and a wear-resistant sheet is tightly attached to the outer layer of the insulating protection layer; when the cable head is overheated, the material on the surface of the rubber sealing element is heated and melted, and the fireproof gel in the rubber sealing element is quickly leaked out and covers the surface of the cable to form a heat-insulating and cooling protection layer, so that the temperature rise speed of the cable is effectively slowed down, and meanwhile, the risk of a fire disaster is also reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion -proof cable, concretely is a kind of flexible winding explosion -proof cable. BACKGROUND

[0002] Explosion -proof cable is widely used in petroleum, chemical industry, mine, ship and other flammable and explosive industrial environments.In these places, cable often needs to withstand high temperature, high pressure and corrosion and other harsh conditions, therefore, using explosion -proof cable can effectively prevent the occurrence of fire and explosion accident, guarantee production and personnel safety;

[0003] Some existing explosion -proof cable may also have deficiencies in joint design, for example, the seal effect of their joints can be poor, so that external environment (such as moisture, dust, etc.) cannot effectively enter the joint inside, affect the explosion -proof performance of joint, at the same time, the existing explosion -proof cable joint can not provide effective heat insulation and cooling measures under overheating condition, thereby increasing the risk of cable damage and fire. SUMMARY

[0004] The utility model aims at: in order to solve the problem mentioned in the above background, provide a kind of flexible winding explosion -proof cable.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of flexible winding explosion -proof cable, comprising: explosion -proof cable, the explosion -proof cable one end fixed plug-in has explosion -proof joint;

[0006] The explosion -proof cable includes cable core arranged inside, the cable core outer side is wrapped with waterproof and moisture-proof layer, the waterproof and moisture-proof layer is inserted with reinforcing core between the cable core, the waterproof and moisture-proof layer outer side is wrapped with metal braided shielding layer, the metal braided shielding layer outer side is wrapped with fireproof layer, the fireproof layer outer side is wrapped with insulation protective layer, the outer layer of the insulation protective layer is closely attached with wear plate.

[0007] As a further scheme of the utility model: the explosion -proof joint includes joint main body, the explosion -proof lock core mechanism is inserted in the inner side of the joint main body, the cable fastening sleeve is screw-connected on the one side of the joint main body, the sealing washer is sleeved on the other end of the joint main body.

[0008] As a further scheme of the utility model: the explosion -proof lock core mechanism includes rubber sealing element inserted in the inner side of the joint main body, the armor fastener is inserted in the outer side of the rubber sealing element.

[0009] As a further scheme of the utility model: there is a certain gap between the cable core, the reinforcing core is inserted in the gap, the reinforcing core adopts glass fiber material, the tensile strength and the compression resistance of the cable are improved, the cable is ensured not to be damaged in the winding and stretching process, the waterproof and moisture-proof layer protects the cable core from the erosion of moisture and humidity, the metal braided shielding layer prevents electromagnetic interference and signal leakage, the fireproof layer adopts ceramicized silicone rubber material, and the insulation protection layer adopts rubber insulation material.

[0010] As a further scheme of the utility model: the joint body is fixedly provided with a screw joint at both ends, the screw joint with the sealing washer one end is screwed with the explosion-proof junction box, and the joint body and the cable fastening sleeve are made of stainless steel.

[0011] As a further scheme of the utility model: the explosion-proof cable passes through the middle of the rubber sealing element, the cable fastening sleeve fastens the armor fastener, the armor fastener is made of soft plastic material, the armor fastener further fastens the rubber sealing element and the explosion-proof cable passing through the rubber sealing element through the tightening effect, and the rubber sealing element is filled with fireproof gel.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] When the cable wire head appears overheating phenomenon, the material of the surface of the rubber sealing element is melted by heat, at the moment, the fireproof gel in the rubber sealing element is rapidly leaked out and covers the surface of the cable, a heat insulation and cooling protection layer is formed, the temperature rising speed of the cable is effectively slowed down, and the risk of fire is reduced.

[0014] Through the extrusion effect of the cable fastening sleeve on the armor fastener, the rubber sealing element and the internal cable are tightly fixed, the stability of the joint is ensured, the sealing property between the joint and the explosion-proof junction box is enhanced through the design of the sealing washer, the invasion of the external environment is effectively prevented, and the overall safety performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic view of the flexible winding explosion-proof cable.

[0016] Figure 2 It is the structure schematic view of the side surface in the flexible winding explosion-proof cable.

[0017] Figure 3 It is the structure schematic view of the explosion-proof cable in the flexible winding explosion-proof cable.

[0018] Figure 4It is the structure schematic view of the explosion-proof joint in the flexible winding explosion-proof cable.

[0019] Figure 5 It is the structure schematic view of the explosion-proof lock core mechanism in the flexible winding explosion-proof cable.

[0020] In the figure: 1, explosion-proof cable; 2, explosion-proof joint; 11, cable core; 12, waterproof and moisture-proof layer; 13, reinforcing core; 14, metal braided shielding layer; 15, fireproof layer; 16, insulation protection layer; 17, wear-resistant sheet; 21, joint main body; 22, explosion-proof lock core mechanism; 23, cable fastening sleeve; 24, sealing washer; 221, armored fastener; 222, rubber sealing element. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments will be described below according to the overall structure of the present application.

[0023] Referring to Figures 1 to 5The utility model discloses an embodiment of a kind of flexible winding explosion-proof cable, comprising: explosion-proof cable 1, explosion-proof cable 1 inside is provided with cable core 11, this is the core part of cable transmission electric energy or signal, cable core 11 outside is wrapped with waterproof and moisture-proof layer 12, for preventing moisture and moisture invasion, to protect cable core 11 from damage, waterproof and moisture-proof layer 12 and cable core 11 between are inserted with reinforcing core 13, with glass fiber material, to enhance the tensile strength and compression resistance of cable, ensure that cable is stable in structure during winding and stretching.

[0024] Waterproof and moisture-proof layer 12 outside is wrapped with metal braided shielding layer 14, for preventing electromagnetic interference and signal leakage, guarantee the accuracy and stability of cable transmission signal, metal braided shielding layer 14 outside is wrapped with fireproof layer 15 again, with ceramic silicon rubber material, can form hard ceramic protective layer under high temperature or fire condition, insulate flame and high temperature, protect cable inside from damage, the outermost layer is insulation protective layer 16, with rubber insulation material, provide additional electrical protection and wear resistance, and wear-resistant sheet 17 that closely attached to it further enhances the wear resistance and service life of cable.

[0025] Explosion-proof joint 2 includes joint main body 21, explosion-proof lock core mechanism 22 is inserted in the inside of joint main body 21, for fixed and sealed cable, cable fastening sleeve 23 is screwed on the side of joint main body 21, by tightening cable fastening sleeve 23, the fastening of explosion-proof lock core mechanism 22 and cable can be realized, ensure the firm connection of cable and joint, the other end of joint main body 21 is then sleeved with sealing washer 24, when joint and explosion-proof terminal box are screwed, sealing washer 24 can provide additional sealing effect, prevent external environment such as moisture, dust etc. from entering the inside of joint, guarantee the explosion-proof performance of joint.

[0026] Explosion-proof lock core mechanism 22 includes rubber sealing element 222 inserted in the inside of joint main body 21, rubber sealing element 222 has good elasticity and sealing performance, can closely adhere to the surface of cable, prevent the invasion of external environment, armored fastener 221 is inserted in the outside of rubber sealing element 222, armored fastener 221 adopts soft plastic material, has certain elasticity and shrinkage, further fastens rubber sealing element 222 and explosion-proof cable 1 that it is inserted through by tightening effect, ensure the sealing property and stability of cable and joint, in addition, fireproof gel is filled in the inside of rubber sealing element 222, when cable appears overheating or fire condition, after rubber sealing element 222 is hot melt, the fireproof gel in its inside can rapidly expand and insulate flame and high temperature, further protect cable and joint from damage.

[0027] The working principle of the utility model is:

[0028] The flexible coiled explosion-proof cable is mainly composed of the explosion-proof cable 1 and the explosion-proof joint 2, the cable core 11 is arranged in the explosion-proof cable 1 and the explosion-proof joint 2, and gaps exist between the cable cores 11; the reinforcing cores 13 made of glass fiber are inserted into the gaps to improve the tensile strength and compression resistance of the cable, so that the cable is not damaged in the coiling and stretching process; the waterproof and moisture-proof layer 12 on the outer side of the cable core 11 effectively protects the cable core 11 from moisture and humidity, so that the electrical performance of the cable is stable; the metal braided shielding layer 14 on the outer side of the waterproof and moisture-proof layer 12 can prevent electromagnetic interference and signal leakage, so that the accuracy and stability of the cable transmission signal are ensured; the fireproof layer 15 made of ceramicized silicone rubber is wrapped on the outer side of the metal braided shielding layer 14, and the fireproof layer 15 can form a hard ceramic protective layer under high temperature or fire, effectively insulates the flame and high temperature, and protects the cable inside from damage; and the wear-resistant sheet 17 attached to the outer layer of the insulating protective layer 16 can improve the wear resistance and service life of the cable.

[0029] Then, the cable fastening sleeve 23 at one end of the explosion-proof joint 2 is loosened, the explosion-proof cable 1 is inserted into the explosion-proof lock core mechanism 22, and then the cable fastening sleeve 23 is tightened; the armored fastener 221 is extruded by the tightening of the cable fastening sleeve 23, the rubber sealing element 222 and the explosion-proof cable 1 inserted into the rubber sealing element 222 are tightened by the armored fastener 221, so that the cable is fixed in the explosion-proof joint 2; the other end of the explosion-proof joint 2 is screwed with the explosion-proof junction box, and the sealing gasket 24 at the other end of the explosion-proof joint 2 can improve the sealing between the explosion-proof joint 2 and the explosion-proof junction box.

[0030] When the wire end of the explosion-proof cable 1 is overheated, the surface temperature of the explosion-proof cable 1 melts the surface material of the rubber sealing element 222, and the fireproof gel in the rubber sealing element 222 leaks out to insulate and cool the surface of the explosion-proof cable 1.

[0031] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A flexible, wound, explosion-proof cable, characterized in that Include: Explosion-proof cable (1), one end of the explosion-proof cable (1) is fixedly connected with an explosion-proof joint (2); The explosion-proof cable (1) comprises a cable core (11) arranged inside, a waterproof and moisture-proof layer (12) wrapped outside the cable core (11), a reinforcing core (13) inserted between the waterproof and moisture-proof layer (12) and the cable core (11), a metal braided shielding layer (14) wrapped outside the waterproof and moisture-proof layer (12), a fireproof layer (15) wrapped outside the metal braided shielding layer (14), and an insulation protection layer (16) wrapped outside the fireproof layer (15), and a wear-resistant sheet (17) tightly attached to an outer layer of the insulation protection layer (16).

2. A flexible, wound, explosion-proof cable according to claim 1, characterized in that The explosion-proof joint (2) comprises a joint body (21), an explosion-proof lock core mechanism (22) inserted inside the joint body (21), a cable fastening sleeve (23) screwed on one side of the joint body (21), and a sealing washer (24) sleeved on the other end of the joint body (21).

3. A flexible, wound, explosion-proof cable according to claim 2, characterized in that The explosion-proof lock core mechanism (22) comprises a rubber sealing element (222) inserted inside the joint body (21), and an armored fastener (221) inserted outside the rubber sealing element (222).

4. A flexible, wound, explosion-proof cable according to claim 1, characterized in that, There is a gap between the cable cores (11), and a reinforcing core (13) is inserted in the gap. The reinforcing core (13) is made of glass fiber material, which improves the tensile strength and compression resistance of the cable, ensures that the cable will not be damaged during winding and stretching, the waterproof and moisture-proof layer (12) protects the cable core (11) from water and moisture, the metal braided shielding layer (14) prevents electromagnetic interference and signal leakage, the fireproof layer (15) is made of ceramic silicone rubber material, and the insulation protection layer (16) is made of rubber insulation material.

5. A flexible, wound, explosion-proof cable according to claim 2, characterized in that, Both ends of the joint body (21) are fixedly provided with screw joints, one end of the sealing washer (24) is sleeved with a screw joint, and the explosion-proof junction box is screwed with the screw joint, and the joint body (21) and the cable fastening sleeve (23) are made of stainless steel material.

6. A flexible, wound, explosion-proof cable according to claim 3, characterized in that, The explosion-proof cable (1) passes through the middle of the rubber sealing element (222), the cable fastening sleeve (23) fastens the armored fastener (221), the armored fastener (221) is made of soft plastic material, the armored fastener (221) further fastens the rubber sealing element (222) and the explosion-proof cable (1) passing through it by tightening, and the rubber sealing element (222) is filled with fireproof gel.

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