Combined explosion-proof electrical penetration assembly

Abstract

The utility model provides a combined explosion-proof electrical penetration assembly. The combined explosion-proof electrical penetration assembly comprises a wiring board, a junction box, an explosion-proof gland joint, a cable connection group and a breathing drain valve, the junction box is provided with a connecting opening, and the connecting opening is connected with the wiring board; the wiring board is of a flange type structure, and the wiring board is connected with the junction box; the cable connection group comprises cables, and the inner end and the outer end of the wiring board are respectively connected with the cables. The technical scheme has the characteristics of quick assembly and disassembly, flexible cable connection mode and strong signal transmission anti-interference capability.

Description

Technical Field

[0001] This utility model relates to the field of electrical penetration technology, and in particular to a combined explosion-proof electrical penetration. Background Technology

[0002] In most hazardous environments, such as explosive atmospheres, centrifugal compressors often require the use of electrical penetrations. These penetrations ensure signal transmission between the compressor's interior and terminal equipment, and the stability of the cable signal transmission must be guaranteed. In explosion-proof locations, electrical penetrations also require appropriate explosion-proof treatment to ensure application safety. Existing explosion-proof electrical penetrations on the market, if easy to disassemble quickly, are not suitable for harsh environments such as waterproof, dustproof, and corrosion-resistant applications. If suitable for such environments, they have complex structures and are difficult to install. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a combined explosion-proof electrical penetration component that features quick assembly and disassembly, flexible cable connection, and strong anti-interference capability for signal transmission.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a combined explosion-proof electrical penetration component, comprising a terminal block, a junction box, an explosion-proof gland connector, a cable connection assembly, and a breather valve; the junction box has a connection opening, which is connected to the terminal block; the terminal block has a flange structure and is connected to the junction box; the cable connection assembly includes cables, and the inner and outer ends of the terminal block are respectively connected to the cables.

[0005] In a preferred embodiment, the terminal block has connecting flanges on both sides, and the connecting flanges are fixedly connected to the connecting portion of the junction box that forms the connecting opening.

[0006] In a preferred embodiment, both the connecting flange head and the junction box forming the connecting opening are provided with screw holes, and the connecting flange head and the junction box forming the connecting opening are fixedly connected by bolts.

[0007] In a preferred embodiment, the cable includes an internal cable and an external cable.

[0008] In a preferred embodiment, the internal cable is soldered to the junction box; the solder joint between the internal cable and the junction box is protected with a heat shrink sleeve.

[0009] In a preferred embodiment, the external cable is introduced into the junction box through an explosion-proof gland connector and plugged into the internal cable, after which the explosion-proof gland connector is locked to secure the cable.

[0010] In a preferred embodiment, the junction box is a flange-type connector that is fixedly connected to the compressor by bolts.

[0011] In a preferred embodiment, a breathing drain valve is also included; the junction box has a drain port, and the breathing drain valve is connected to the drain port.

[0012] In a preferred embodiment, the junction box is provided with internal and external grounding points. The internal grounding can be used to reduce electromagnetic signal interference, while the external grounding can be used for machine safety protection.

[0013] In a preferred embodiment, the cable connection assembly further includes crimp terminals and a plastic housing.

[0014] Compared with the prior art, the present invention has the following advantages: quick assembly and disassembly, flexible cable connection, and strong anti-interference capability for signal transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0016] Attached reference numerals: 1-Connecting board, 2-Junction box, 3-Explosion-proof gland connector, 4-Cable connection group, 41-Cable, 42-Crimp terminal, 43-Plastic shell, 5-Breathing drain valve. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application; as used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise; furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] A combined explosion-proof electrical penetration device is capable of operating normally in an explosive environment and cannot become an ignition source under either normal operation or anticipated fault conditions. It includes a junction box 1, a junction box 2, an explosion-proof gland connector 3, a cable connection assembly 4, and a breather valve 5; these constitute the main body of the combined explosion-proof electrical penetration device.

[0021] The terminal block 1 has a flange structure. The terminal block uses a glass sintering core for wrapping and sealing. The same number of independent pins are reserved on both sides.

[0022] The junction box 2 is a flange structure, which is bolted to the compressor housing. The length of the explosion-proof mating surface is designed according to the national standard explosion-proof requirements, so that the explosion-proof box can withstand the explosion of explosive mixtures that enter the interior of the shell through any mating surface or structural gap without being damaged, and will not cause ignition of the external explosive gas environment formed by one or more gases or vapors.

[0023] The junction box 1 and the cable connection group 4 are welded together into a single structure. The cable connection group 4 uses conventional cables and does not require shielding, avoiding excessively thick cables that would occupy unnecessary installation space. The cable connection group 4 requires the cables 41 to be stripped first, and then each cable is welded to a single pin. The outside of the cables is protected with heat shrink sleeves to enhance the robustness of the assembly. The other side of the cables 41 is also stripped, and then secured to the plastic shell 43 using crimp terminals 42. The fully protective plastic shell protects the contacts and ensures reliable connection.

[0024] The junction box 2 is provided with a threaded cable outlet, which is used with the explosion-proof gland connector 3; external cables need to be introduced from the explosion-proof gland connector 3 and plugged into the cable connection group 4 in the junction box 2.

[0025] The junction box 2 is equipped with a breathing and drainage interface; the junction box 2 is equipped with internal and external grounding; the mating surfaces of the junction board 1 are all sealed with O-rings; the mating surfaces of the junction box 2 are all sealed with O-rings; if liquid accumulates inside the junction box 2, it can be drained directly; the internal grounding and signal lines of the junction box 2 are led out together through the explosion-proof gland 3.

[0026] like Figure 1As shown, in this embodiment, the terminal block 1 has a flange structure. The terminal block uses a glass sintered core for wrapping and sealing, and both sides have the same number of independent pins. The terminal block 1 and the cable connection group 4 are welded together to form an integrated structure. The other side of the cable 41 is fixed to the plastic shell 43 using a crimp terminal 42. The internal cable connection uses conventional cables, without the need for a shielding structure, to avoid excessively thick cables that occupy unnecessary installation space. The welded joints between the internal cables and the terminal block are protected with heat shrink sleeves to enhance the robustness of the assembly. The fully protective plastic shell protects the contacts and ensures connection reliability. After the terminal block 1 and the cable connection group 4 are assembled, they are bolted to the compressor housing and can be disassembled and installed independently of the compressor and the junction box 2, making the operation simple and quick. When installing the junction box 2, the terminal block 1 and the cable connection group 4 are connected together. Cable connection assembly 4 completely covers the inside of the box. Junction box 2 is equipped with a threaded lead-in port and is used with explosion-proof gland 3. External cables are introduced into the box through the gland and plugged into cable connection assembly 4, and then the explosion-proof gland 3 is locked to secure the cable. Junction box 2 has a flange structure and is bolted to the compressor housing. The length of the explosion-proof mating surface is designed according to national explosion-proof requirements, so that the explosion-proof box can withstand the explosion of explosive mixtures entering the housing through any mating surface or structural gap without damage, and will not cause ignition of the external explosive gas environment formed by one or more gases or vapors. Junction box 2 is bolted to the housing. When the equipment is running, this electrical penetration can operate normally in an explosive environment, and will not become an ignition source under normal operation or expected fault conditions. This structure is simple, easy to disassemble and assemble, and has no limit on the angle of external cable introduction, few vulnerable parts, and saves on later maintenance costs.

[0027] like Figure 1 As shown, the junction box is equipped with internal and external grounding points. The internal grounding can be used to reduce electromagnetic signal interference, while the external grounding can be used for machine safety. The internal grounding and external inlet cables are led out from the same threaded outlet explosion-proof gland. The coaxial cable structure satisfies the convenience of pressure-bearing and sealing, while avoiding problems such as incomplete shielding and poor anti-interference ability caused by discontinuous cable structure in electrical penetrations.

[0028] The advantages of this utility model are: fewer vulnerable parts, quick assembly and disassembly, flexible cable connection, strong anti-interference ability of signal transmission, and good reliability;

[0029] The above description is only a few embodiments of the present utility model and is not intended to limit any modifications, substitutions, improvements, etc., made to the present utility model within its application scope.

Claims

1. A combined explosion-proof electrical penetration component, characterized in that, The device includes a junction box, a junction panel, an explosion-proof gland connector, a cable connection assembly, and a breather valve; the junction box has a connection opening that connects to the junction box; the junction box has a flange structure and connects to the junction box; the cable connection assembly includes cables, and the inner and outer ends of the junction box are respectively connected to the cables.

2. The combined explosion-proof electrical penetration component according to claim 1, characterized in that, The terminal block has connecting flanges on both sides, and the connecting flanges are fixedly connected to the connecting part of the junction box that forms the connecting opening.

3. A combined explosion-proof electrical penetration component according to claim 2, characterized in that, The connecting flange head and the junction box forming the connecting opening are both provided with screw holes, and the connecting flange head and the junction box forming the connecting opening are fixedly connected by bolts.

4. A combined explosion-proof electrical penetration component according to claim 1, characterized in that, The cables include internal cables and external cables.

5. A combined explosion-proof electrical penetration component according to claim 4, characterized in that, The internal cable is welded to the junction box; the welded joint between the internal cable and the junction box is protected with a heat shrink sleeve.

6. A combined explosion-proof electrical penetration component according to claim 4, characterized in that, The external cable is introduced into the junction box through an explosion-proof gland connector and plugged into the internal cable. The explosion-proof gland connector is then locked to secure the cable.

7. A combined explosion-proof electrical penetration component according to claim 1, characterized in that, The junction box is a flange-type connector, which is fixedly connected to the compressor by bolts.

8. A combined explosion-proof electrical penetration component according to claim 1, characterized in that, It also includes a breathing drainage valve; the junction box has a drainage port, and the breathing drainage valve is connected to the drainage port.

9. A combined explosion-proof electrical penetration component according to claim 1, characterized in that, The junction box is equipped with internal and external grounding points. The internal grounding can be used to reduce electromagnetic signal interference, while the external grounding can be used for machine safety.

10. A combined explosion-proof electrical penetration component according to claim 1, characterized in that, The cable connection assembly also includes crimp terminals and a plastic housing.

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