A dustproof structure for PLC controller interface terminals

Abstract

This utility model discloses a dustproof structure for PLC controller interface terminals, relating to the field of PLC controller wiring protection technology. The utility model includes a tower-shaped dust cover; the tower-shaped dust cover includes a cover body, a cable threading nozzle integrally disposed at the front end of the cover body, and a mounting ring fixed to the rear end of the cover body; the outer ring of the central opening of the mounting ring has an annular sealing groove recessed therein, and a guide tube is threadedly fitted onto the inner ring of the central opening of the mounting ring. The guide tube is adapted to a pre-reserved cable threading hole in the PLC controller housing. The mounting ring is fixed to the outer ring of the pre-reserved cable threading hole in the PLC controller housing by screws. This utility model, through the external protection of the PLC controller wiring hole by the tower-shaped dust cover, the tight fit between the cable threading nozzle and the connecting wire, and the sealing fit between the mounting ring and the PLC controller housing, effectively prevents external dust and impurities from entering the controller, avoiding faults such as poor contact or short circuits caused by dust accumulation, and improving the stability and reliability of equipment operation.

Description

Technical Field

[0001] This utility model belongs to the field of PLC controller wiring protection technology, and in particular relates to a dustproof structure for PLC controller interface terminals. Background Technology

[0002] In industrial automation control systems, PLCs (Programmable Logic Controllers) serve as core control devices and are widely used in various production equipment and automation systems. Their interface terminals are crucial components for connecting external input / output signal lines, typically located at pre-drilled wiring holes on the controller housing. Due to the complex working environment, these interface terminals are constantly exposed to the elements, making them susceptible to dust, impurities, and moisture, leading to problems such as poor contact, short circuits, and signal interference. In severe cases, this can even cause equipment malfunctions or safety accidents.

[0003] Traditional PLC controller interface terminal protection methods often use simple rubber plugs, plastic covers, or fixed dust covers for sealing, which have problems such as poor sealing, simple structure, inconvenient installation, and poor adaptability. For example, some dustproof structures can only provide basic shielding and cannot effectively prevent dust from entering the controller along the cables; some structures lack protection for the connecting wires, which can easily become loose or damaged when the cables are pulled.

[0004] To address this issue, we provide a dustproof structure for the PLC controller interface terminals. Utility Model Content

[0005] The purpose of this utility model is to provide a dustproof structure for PLC controller interface terminals. By setting a tower-shaped dustproof cover to externally protect the wiring holes, the problem of poor effectiveness of existing PLC controller interface terminal protection methods is solved.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a dustproof structure for a PLC controller interface terminal, comprising a tower-shaped dustproof cover; the tower-shaped dustproof cover includes a cover body, a wire threading nozzle integrally disposed at the front end of the cover body, and a mounting ring fixed to the rear end of the cover body; the outer ring of the central opening of the mounting ring is recessed with an annular sealing groove, and the inner ring of the central opening of the mounting ring is threaded to fit a guide tube, the guide tube being adapted to a wire threading hole reserved in the PLC controller housing, and the mounting ring being fixed to the outer ring of the reserved wire threading hole in the PLC controller housing by screws; the wire threading nozzle, the internal cavity of the cover body, and the guide tube constitute the PLC controller wiring channel.

[0007] The present invention is further configured such that the threading nozzle is an elastic conical structure, and an opening for threading the connecting wire is provided in the middle position of the threading nozzle, and the inner wall of the opening is fitted to the periphery of the connecting wire.

[0008] The present invention is further configured such that the annular sealing groove is adapted to the sealing gasket, and the mounting ring is sealed to the outer wall of the PLC controller housing through the sealing gasket.

[0009] The present invention is further configured such that the inner ring of the central opening of the mounting ring is provided with a thread for mounting the end of the guide tube, and the guide tube is provided with multiple diameter sizes.

[0010] The present invention is further provided that the cover is made of flame-retardant and corrosion-resistant material, and the surface of the cover is treated with anti-static treatment.

[0011] The present invention is further configured such that the mounting ring is provided with a plurality of evenly distributed mounting through holes, the mounting through holes being aligned with the pre-set screw holes on the PLC controller housing, and a fixed connection is achieved by screws.

[0012] The present invention is further configured such that the cover is arranged in a tower-shaped structure, which gradually narrows from the mounting ring to the wire threading nozzle, forming a cavity with decreasing internal space.

[0013] This utility model has the following beneficial effects: 1. This utility model effectively prevents external dust and impurities from entering the PLC controller by setting a tower-shaped dust cover to protect the PLC controller wiring holes, ensuring a tight fit between the wire threading nozzle and the connecting wire, and sealing the mounting ring with the PLC controller housing. This avoids faults such as poor contact or short circuits caused by dust accumulation, and improves the stability and reliability of equipment operation.

[0014] 2. The cover of this utility model not only has a dustproof function, but also can undergo synchronous deformation when the connecting wire is pulled by external force, which plays a buffering role and prevents the wire from breaking or loosening due to excessive force. It realizes protection against bending and stretching of the connecting wire and extends the service life of the line. At the same time, the inner ring of the mounting ring is provided with threads, and guide tubes of different diameter specifications can be detachably installed, which can be flexibly replaced according to the actual wire hole size, adapting to the needs of various PLC controllers and improving versatility and assembly flexibility. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of a dustproof structure for a PLC controller interface terminal.

[0017] Figure 2 This is a schematic diagram of the interior of a dustproof structure for a PLC controller interface terminal.

[0018] Figure 3 This is a schematic diagram showing the location of the wire threading nozzle in a dustproof structure for a PLC controller interface terminal.

[0019] Figure 4 This is a schematic diagram of the mounting ring structure for a dustproof structure of a PLC controller interface terminal.

[0020] The attached diagram lists the components represented by each number as follows: 100-Tower-shaped dust cover, 101-Cover body, 102-Mounting ring, 102a-Annular sealing groove, 102b-Guide tube, 103-Wire threading nozzle. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Example Please see Figure 1-4 This utility model relates to a dustproof structure for a PLC controller interface terminal, comprising a tower-shaped dust cover 100; the tower-shaped dust cover 100 includes a cover body 101, a wire threading nozzle 103 integrally disposed at the front end of the cover body 101, and a mounting ring 102 fixed to the rear end of the cover body 101; the outer ring of the central opening of the mounting ring 102 is recessed with an annular sealing groove 102a, and the inner ring of the central opening of the mounting ring 102 is threadedly fitted with a guide tube 102b, the guide tube 102b being adapted to the wire threading hole reserved in the PLC controller housing, and the mounting ring 102 being fixed to the outer ring of the reserved wire threading hole in the PLC controller housing by screws; the wire threading nozzle 103, the internal cavity of the cover body 101, and the guide tube 102b form a PLC controller wiring channel; The dustproof structure of the PLC controller interface terminal adopts a tower-shaped dust cover 100 as the external protection structure of the wiring port, which can effectively prevent dust from entering the controller. At the same time, the tower-shaped cover 101 not only serves as a dustproof structure, but also protects the connecting wires from bending. When the connecting wires are pulled, the layers of the cover 101 deform synchronously under the action of traction force to achieve buffer protection for the connecting wires. The cover 101 is equipped with a replaceable guide tube 102b to adapt to the embedded installation of various types of PLC controller wiring holes.

[0023] Specifically, the cover 101 is made of flame-retardant and corrosion-resistant materials, and the surface of the cover 101 is treated with anti-static agents to prevent static electricity from attracting dust or causing safety hazards. The cover 101 is arranged in a tower-shaped structure, which gradually narrows from the mounting ring 102 to the wire threading nozzle 103, forming a cavity with decreasing internal space. The wire threading nozzle 103 is an elastic conical structure, and an opening for the connecting wire is opened in the middle of the wire threading nozzle 103. The inner wall of the opening is fitted to the periphery of the connecting wire to enhance the sealing performance and prevent dust from entering the controller along the cable.

[0024] Furthermore, the mounting ring 102 is provided with multiple evenly distributed mounting through holes, which are aligned with the pre-set screw holes on the PLC controller housing. A fixed connection is achieved using screws to secure the cover 101. The annular sealing groove 102a is adapted to the sealing gasket. The mounting ring 102 and the outer wall of the PLC controller housing are sealed together through the sealing gasket, preventing dust and other impurities from entering the cover 101 from the connection point of the mounting ring 102. The inner ring of the opening at the center of the mounting ring 102 is provided with a thread for installing the end of the guide tube 102b. This thread facilitates the detachable installation of the guide tube 102b. The guide tube 102b is available in multiple diameter sizes. Based on the size of the reserved wiring hole on the PLC controller housing, a guide tube 102b of the corresponding size is selected for installation, ensuring a complete fit between the guide tube 102b and the reserved wiring hole, reducing gaps.

[0025] The operation process of this embodiment is as follows: First, select a guide tube 102b of appropriate diameter according to the size of the reserved wire hole on the PLC controller housing, and tighten it by screwing it into place through the thread of the inner ring at the opening in the middle of the mounting ring 102; then, embed a sealing washer in the annular sealing groove 102a of the mounting ring 102 to ensure the sealing between it and the outer wall of the PLC controller housing; align the tower-shaped dust cover 100 with the wire hole position, and align the mounting through hole on the mounting ring 102 with the screw hole pre-set on the PLC controller housing; tighten the screw through the mounting through hole to complete the secure installation of the dust cover; next, insert the connecting wire through the elastic tapered opening of the wire insertion nozzle 103. The inner wall of the central opening has a certain degree of elasticity and fits tightly against the periphery of the connecting wire, effectively preventing dust from entering the interior of the cover 101 along the cable. The connecting wire passes through the internal cavity of the cover 101 and the guide tube 102b, and finally connects to the internal wiring terminal of the PLC controller. When the connecting wire is pulled by external force, the various layers of the tower-shaped cover 101 will undergo slight deformation synchronously under the traction force, playing a buffering and protective role and preventing the wire from becoming loose or damaged due to pulling. If it is necessary to replace the connecting wire with a different specification or to adapt to the wire hole with a different inner diameter, simply remove the fixing screws of the mounting ring 102, take out the old guide tube 102b and replace it with a new guide tube 102b of the corresponding size to adapt to the new wiring requirements. Throughout the process, the tower-shaped dust cover 100 not only achieves a good dustproof effect, but also takes into account the bending protection and sealing performance of the connecting wire, improving the safety and stability of the PLC controller operation.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A dustproof structure for a PLC controller interface terminal, comprising a tower-shaped dust cover (100); characterized in that: The tower-shaped dust cover (100) includes a cover body (101), a wire threading nozzle (103) integrally disposed at the front end of the cover body (101), and a mounting ring (102) fixed at the rear end of the cover body (101). The outer ring of the central opening of the mounting ring (102) is provided with an annular sealing groove (102a), and the inner ring of the central opening of the mounting ring (102) is threaded and fitted with a guide tube (102b). The guide tube (102b) is adapted to the wire threading hole reserved in the PLC controller housing. The mounting ring (102) is fixed to the outer ring of the wire threading hole reserved in the PLC controller housing by screws. The wire threading nozzle (103), the internal cavity of the cover body (101), and the guide tube (102b) form the PLC controller wiring channel.

2. The dustproof structure for PLC controller interface terminals according to claim 1, characterized in that, The threading nozzle (103) has an elastic conical structure, and an opening for threading the connecting wire is opened in the middle of the threading nozzle (103), with the inner wall of the opening fitting against the periphery of the connecting wire.

3. The dustproof structure for PLC controller interface terminals according to claim 1, characterized in that, The annular sealing groove (102a) is adapted to the sealing gasket, and the mounting ring (102) is sealed to the outer wall of the PLC controller housing through the sealing gasket.

4. The dustproof structure for PLC controller interface terminals according to claim 1, characterized in that, The inner ring of the central opening of the mounting ring (102) is provided with a thread for mounting the end of the guide tube (102b), and the guide tube (102b) is provided with various diameter sizes.

5. The dustproof structure for PLC controller interface terminals according to claim 1, characterized in that, The cover (101) is made of flame-retardant and corrosion-resistant materials, and the surface of the cover (101) is treated with anti-static agents.

6. The dustproof structure for PLC controller interface terminals according to claim 1, characterized in that, The mounting ring (102) is provided with a plurality of evenly distributed mounting through holes, which are aligned with the pre-set screw holes on the PLC controller housing and are fixedly connected by screws.

7. The dustproof structure for PLC controller interface terminals according to claim 1, characterized in that, The cover (101) is arranged in a tower-shaped structure, which gradually narrows from the mounting ring (102) to the threading nozzle (103), forming a cavity with decreasing internal space.

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