An explosion-proof conduit and explosion-proof device

Abstract

This utility model provides an explosion-proof conduit and explosion-proof device. The explosion-proof conduit includes a housing and fasteners. A first end of the housing has a step with a limiting function. The second end of the housing is screwed to the fastener. A partition is provided inside the housing, perpendicular to the wire threading direction. The partition has a threading hole allowing the communication cable bundle to pass through. A mandrel is provided inside the threading hole. This utility model embodiment ensures sealing, insulation, and explosion-proof performance, is unaffected by ambient temperature, does not require high or low temperature testing during certification, and meets water pressure testing requirements. This embodiment does not require sealing during manufacturing, making production convenient and quick.

Description

Technical Field

[0001] This utility model relates to the technical field of threading devices, and more specifically, to an explosion-proof threading sleeve and an explosion-proof device. Background Technology

[0002] The common structure of conduit sleeves generally includes a housing, conductors, conductor positioning devices, cables, and sealant for cable fixing. The sealant is prone to aging, leading to poor sealing. Furthermore, existing conduit sleeves require high and low temperature resistance testing of the sealant during international certification. Conduit sleeves that pass the high and low temperature resistance test may fail to meet water pressure testing requirements, thus affecting overall product certification. Existing explosion-proof devices often do not use conduit sleeves, typically employing explosion-proof horn-shaped outlets to lead out signal cables. This necessitates opening the explosion-proof device's cover during wiring, making on-site wiring inconvenient. Utility Model Content

[0003] To address the problems of inadequate sealing and inconvenient on-site wiring in existing technologies, this utility model provides an explosion-proof conduit and explosion-proof device.

[0004] In view of this, one embodiment of the present utility model provides an explosion-proof wire conduit, including a housing and a fastener. The first end of the housing is provided with a step that has a limiting function. The second end of the housing is screwed together with the fastener. A partition is provided inside the housing. The partition is arranged perpendicular to the wire threading direction. The partition is provided with a wire threading hole that allows the wire harness of the communication cable to pass through. A mandrel is provided inside the wire threading hole.

[0005] In some embodiments, a sheath is further provided inside the threading hole, and the sheath is fitted over the outside of the mandrel.

[0006] In some embodiments, the length of the mandrel is greater than the length of the thread hole.

[0007] In some embodiments, the number of the through holes matches the number of wire bundles in the communication cable.

[0008] In some embodiments, the step is a flange structure extending radially outward from the outer surface of the first end of the housing.

[0009] In some embodiments, grooves are provided at intervals on the end face of the step.

[0010] In some embodiments, there are an even number of grooves and the grooves are arranged opposite to each other.

[0011] In some embodiments, the fastener has a mounting hole on its side for inserting a locking element.

[0012] In some embodiments, the fastener has a polygonal cross-section.

[0013] One embodiment of this utility model provides an explosion-proof device, including an explosion-proof cavity and an intrinsically safe cavity, wherein an explosion-proof conduit sleeve as described above is provided between the explosion-proof cavities and / or between the explosion-proof cavity and the intrinsically safe cavity.

[0014] This utility model embodiment can, for example, be used as a conduit for communication between the explosion-proof cavity and the intrinsically safe cavity of a mine explosion-proof enclosure. By fixing the communication cable harness to the enclosure, sealing, insulation, and explosion-proof performance are ensured. Furthermore, this utility model embodiment is unaffected by ambient temperature, does not require high or low temperature testing during certification, and meets water pressure testing requirements. Additionally, no adhesive sealing is required during the manufacturing process of this embodiment, making production convenient and quick.

[0015] To make the above-mentioned objects, features and advantages of the present utility model embodiments more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to illustrate the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method. The accompanying drawings, which are provided to further understand the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 This is a cross-sectional view of the threading sleeve provided in this embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the threading sleeve provided in this embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the housing in the threading sleeve provided in this embodiment of the utility model;

[0020] Figure 4 This is a bottom view of the threading sleeve provided in this embodiment of the utility model;

[0021] Figure 5This is a top view of the threading sleeve provided in this embodiment of the utility model.

[0022] The reference numerals in the above figures are as follows:

[0023] 1-Housing; 2-Sheath; 3-Mandrel; 4-Communication cable; 5-Fastener; 51-Mounting hole; 6-Locking part; 7-Step; 71-Groove; 8-Explosion-proof mating surface; 9-External thread; 11-Baffle; 111-Wire hole. Detailed Implementation

[0024] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of the present invention.

[0025] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0026] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0027] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0028] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0029] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0030] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0033] The first embodiment of this utility model provides an explosion-proof conduit sleeve, which is mainly used between explosion-proof cavities and / or between explosion-proof cavities and intrinsically safe cavities in explosion-proof devices. Specifically, it is used to connect communication cables between two cavities, and specifically to locate, aggregate, and fix different wire bundles in the communication cable, thereby achieving the purpose of communication between the two cavities while simultaneously meeting explosion-proof requirements.

[0034] like Figures 1-5 As shown, the explosion-proof conduit includes a housing 1 and a fastener 5. The housing 1 is a cylindrical structure. A step 7 is provided at the first end of the housing 1. When the explosion-proof conduit is installed, the step 7 is used to limit the movement, specifically to prevent the explosion-proof conduit from rotating freely after installation.

[0035] Furthermore, the second end of the housing 1 is screwed together with the fastener 5. Here, the communication cable 4 passes through, for example, the second end of the housing 1 and exits from, for example, the first end of the housing 1. Then, it is screwed together with the fastener 5 to the second end of the housing 1, thereby fixing the communication cable 4 to the explosion-proof conduit and ensuring a high degree of sealing.

[0036] In this embodiment, the housing 1 is made of explosion-proof material. The outer surface of the housing 1 is an explosion-proof mating surface 8, which provides explosion protection. An external thread 9 is provided on the outer surface of the housing 7 near the second end, and an internal thread is provided on the inner side of the fastener 5. The external thread 9 and the internal thread of the fastener 5 are used to tighten the fastener. Preferably, in this embodiment, the fastener 5 is a fastening nut, and the second end of the housing 7 is tightened with the fastening nut.

[0037] Specifically, the step 7 is provided outward along the edge of the first end of the housing 1. The step 7 serves to limit the installation of the explosion-proof conduit between the two cavities. The outer edge of the step 7 is circular, thus matching the outer surface of the housing 1. Preferably, the step 7 can be, for example, a flange structure extending radially outward from the outer surface of the first end of the housing 1.

[0038] Furthermore, grooves 71 are provided at intervals on the end face of the step 7. Preferably, there are an even number of grooves 71 and the grooves 71 are arranged opposite to each other. The grooves 71 facilitate the increase of friction with the external structure during installation, so that the explosion-proof conduit can be set more stably in the predetermined position, and it is also convenient for the housing 1 and the fastener 5 to be tightened together.

[0039] Furthermore, the fastener 5 has a polygonal cross-section, which facilitates the tightening of the fastener 5 with the housing 1. Preferably, the cross-section of the fastener 5 is hexagonal.

[0040] To achieve a fastening effect between the fastener 5 and the housing 1, a mounting hole 51 is provided on the side of the fastener 5. The mounting hole 51 is used to insert a locking member 6, which may be, for example, a fastening screw. By inserting the locking member 6 into the mounting hole 51 and abutting against the outer surface of the housing 1, the relative position between the housing 1 and the fastener 5 can be locked, preventing the fastener 5 from rotating relative to the housing 1 to the greatest extent.

[0041] Furthermore, considering that the communication cable 4 includes multiple wire bundles with different functions, a partition 11 is provided inside the housing 1. The outer diameter of the partition 11 matches the inner diameter of the housing 1, and the surface of the partition 11 is perpendicular to the wire threading direction. The partition 11 is provided with wire threading holes 111, the number of which matches the number of wire bundles in the communication cable 4. This allows each wire bundle of the communication cable 4 to pass through one side of the wire threading hole 111 to the other side, thereby enabling the positioning of different wire bundles and preventing them from tangling. Preferably, the partition 11 is located, for example, in the middle of the housing 1.

[0042] Furthermore, the length of the threading hole 111 can be determined according to requirements. A mandrel 3 is provided on the inner wall of the threading hole 111. The wires of the communication cable 4 pass through the mandrel 3. The mandrel 3 is used to support the wire bundle and ensure the coaxiality of each wire bundle. It also ensures that each wire bundle has a certain strength so that it can pass through the threading hole 111 without bending. The length of the mandrel 3 is greater than the length of the threading hole 111, thereby providing better support for the wire bundle.

[0043] Preferably, a sheath 2 is further provided inside the threaded hole 111. The sheath 2 is fitted over the outside of the spindle 3 and has the functions of fixing, sealing, and insulating. The sheath 2 is preferably made of glass material. Using glass material facilitates a tighter connection between the sheath 2 and the housing 1, between the spindle 3 and the sheath 2, and between the wire harness of the communication cable 4 and the spindle 3 during manufacturing, through a melting process. Preferably, the length of the sheath 2 can match the length of the threaded hole 111, and the length of the sheath 2 is particularly less than the length of the spindle 3. According to GB / T3836, the glass material used in this embodiment is a material unaffected by ambient temperature.

[0044] In manufacturing the explosion-proof conduit of this embodiment, the sheath 2 is first fitted onto the outside of the mandrel 3, and the sheath 2 is fixed inside the conduit hole 111 using a special fixture. Then, the sheath 2 is melted between the mandrel 3 and the inner wall of the conduit hole 111 by high-temperature heating, thereby fixing and insulating the mandrel 3 and the conduit hole 111 and significantly improving the sealing performance. Then, the wire harness of the communication cable 4 is passed through the mandrel 3, and finally, the wire harness is fixed to the mandrel 3 by welding or other methods.

[0045] The second embodiment of this utility model provides an explosion-proof device, which includes an explosion-proof cavity and an intrinsically safe cavity, and an explosion-proof conduit sleeve as described above is provided between the explosion-proof cavities and / or between the explosion-proof cavity and the intrinsically safe cavity.

[0046] This utility model embodiment can, for example, be used as a conduit for communication between the explosion-proof cavity and the intrinsically safe cavity of a mine explosion-proof enclosure, enabling the communication cable to be fixed to the enclosure, thereby ensuring sealing, insulation, and explosion-proof performance. Furthermore, this utility model embodiment is unaffected by ambient temperature, does not require high or low temperature testing during certification, and meets water pressure testing requirements. Additionally, this embodiment does not require adhesive sealing during manufacturing, making production convenient and quick.

[0047] In the above embodiments of this utility model, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0048] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0049] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0050] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An explosion-proof wire-through bushing, characterized by, The device includes a housing and fasteners. A step with a limiting function is provided at the first end of the housing. The second end of the housing is screwed to the fastener. A partition is provided inside the housing. The partition is perpendicular to the wire threading direction. A wire threading hole is provided on the partition to allow the wire bundle of the communication cable to pass through. A mandrel is provided inside the wire threading hole. The mandrel is used to support the wire bundle and ensure the coaxiality of each wire bundle. A sheath is also provided inside the wire threading hole. The sheath is sleeved on the outside of the mandrel and fused between the mandrel and the inner wall of the wire threading hole.

2. The flameproof bushing of claim 1, wherein, The length of the mandrel is greater than the length of the thread hole.

3. The explosion-proof conduit sleeve according to claim 1, characterized in that, The number of wire holes matches the number of wire bundles in the communication cable.

4. The explosion-proof conduit sleeve according to claim 1, characterized in that, The step is a flange structure that extends radially outward from the outer surface of the first end of the housing.

5. The explosion-proof conduit sleeve according to claim 1, characterized in that, Grooves are spaced apart on the end face of the step.

6. The explosion-proof conduit sleeve according to claim 5, characterized in that, The number of grooves is even, and the grooves are arranged opposite to each other.

7. The explosion-proof conduit sleeve according to claim 1, characterized in that, The fastener has mounting holes on its side for inserting locking components.

8. The explosion-proof conduit sleeve according to claim 1, characterized in that, The fastener has a polygonal cross-section.

9. An explosion-proof device, characterized in that, It includes an explosion-proof cavity and an intrinsically safe cavity, and an explosion-proof conduit sleeve according to any one of claims 1-8 is provided between the explosion-proof cavities and / or between the explosion-proof cavity and the intrinsically safe cavity.

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