A cable connector suitable for use in explosive environments

Abstract

The utility model discloses a cable connector suitable for explosive environment use, including metal connector, metal connecting cover, metal compression pad pipe and sealing rubber pipe, metal connector realizes threaded connection through the explosion -proof external thread of front end and the explosion -proof internal thread of metal connecting cover, the metal connecting cover can push metal compression pad pipe to the direction of metal sealing rubber pipe and extrude metal sealing rubber pipe when tightening rotation, make the rear end part of metal sealing rubber pipe take place reduced deformation at the inner wall of tapering channel, and then seal and fix the cable of introduction, the utility model has the advantages of superior explosion -proof performance, safe and reliable structure, has better tensile capacity, and simple and convenient installation, high protection level and the like. When the cable connector is connected to the electrical equipment that meets the explosion -proof contact surface, the internal space generates spark, and there is no explosion risk to the outside, greatly improve the safety of electrical appliance in explosive environment.

Description

Technical Field

[0001] This utility model relates to the field of cable connector technology, and more specifically, to a cable connector suitable for use in explosive environments. Background Technology

[0002] Cable connectors are devices used in the fixing and protection of wires and cables in mechanical electrical equipment, marine electrical equipment, and corrosion-resistant equipment. Their main function is to secure and seal the cables. Currently, common cable connectors generally use mechanical clamping, with clamping components made of plastic using a triple-claw structure. This method is low-cost and easy to install, but its clamping and sealing effect is poor. In the event of a fire, it is prone to explosion-proof failure, and the cable connector does not meet explosion-proof requirements. Furthermore, its tensile strength still needs improvement. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects in the prior art and provide a cable connector suitable for use in explosive environments, which has the advantages of superior explosion-proof performance, safe and reliable structure, good tensile strength, simple and convenient installation, and high protection level.

[0004] To achieve the above objectives, this utility model provides a cable connector suitable for use in explosive atmospheres, comprising an explosion-proof metal connector, an explosion-proof metal connector cover, a hollow metal compression gasket tube, and a hollow sealing tube. The metal connector has a front straight channel, a tapering channel, and a rear straight channel connected sequentially inside. The diameter of the front straight channel is larger than the diameter of the rear straight channel. The tapering channel is truncated cone-shaped, and its diameter gradually decreases towards the rear straight channel. The front outer wall of the metal connector has a front explosion-proof external thread, the rear outer wall of the metal connector has a rear explosion-proof external thread, and the inner wall of the metal connector cover has an explosion-proof internal thread. The connector head is threadedly connected to the explosion-proof internal thread of the metal connector cap via an explosion-proof external thread at the front end. A wire-passing center hole is provided in the middle of the front end of the metal connector cap. The metal compression pad tube and the sealing tube are sequentially installed in the straight channel at the front end of the metal connector head. The front end of the metal compression pad tube contacts the inner front end of the metal connector cap, and the rear end of the metal compression pad tube contacts the front end of the metal sealing tube. The rear end of the metal sealing tube is placed in the tapering channel. When the metal connector cap is tightened and rotated, it can push the metal compression pad tube towards the metal sealing tube, causing the metal compression pad tube to squeeze the metal sealing tube, thereby causing the rear end of the metal sealing tube to shrink and deform at the inner wall of the tapering channel.

[0005] Preferably, the metal connector is made of stainless steel 304, and the contact surfaces of the front and rear explosion-proof external threads of the metal connector meet the H6 thread fit accuracy requirements, and the thread length is greater than the number of threads required for explosion-proof fit.

[0006] Preferably, the outer wall of the metal connector is provided with a first hexagonal screw.

[0007] Preferably, the metal connecting cover is made of stainless steel 304, the contact surface of the explosion-proof internal thread of the metal connecting cover meets the H6 thread fit accuracy requirement, and the thread length is greater than or equal to the number of threads required for explosion-proof fit.

[0008] Preferably, the outer wall of the metal connecting cover is provided with a second hexagonal screw head.

[0009] Preferably, the sealing tube is made of high-temperature resistant fluororubber.

[0010] Preferably, the metal compression pad tube is made of stainless steel 304.

[0011] Preferably, the outer wall of the metal connector is fitted with an O-shaped sealing gasket located behind the first hexagonal screw head.

[0012] Preferably, the sealing gasket is made of high-temperature resistant silicone.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model has a reasonable structural design, featuring an explosion-proof metal connector, an explosion-proof metal connector cover, a metal compression pad tube, and a sealing tube. When the metal connector cover is tightened and rotated, it can push the metal compression pad tube towards the metal sealing tube and squeeze the metal sealing tube, causing the rear end of the metal sealing tube to shrink and deform at the inner wall of the tapering channel, thereby sealing and fixing the introduced cable. This utility model is an improvement on the heavy-duty connector according to explosion-proof standards. It is an explosion-proof cable connector for high-requirement sealed explosion-proof environments. It can be installed at the connection between the explosion-proof cable port and the explosion-proof electrical equipment, playing a sealing and explosion-proof role. It has the advantages of superior explosion-proof performance, safe and reliable structure, good tensile strength, simple and convenient installation, and high protection level.

[0015] 2. The metal connecting cover of this utility model is made of stainless steel 304 with explosion-proof contact surface, and the metal connector is made of stainless steel 304 with explosion-proof thread surface. The explosion-proof contact surface of this cable connector has higher requirements and the thread fit accuracy is higher. When the cable connector is connected to electrical equipment with explosion-proof contact surface, sparks will occur in its internal space, but there will be no risk of explosion to the outside, which greatly improves the safety of electrical equipment in explosive environments.

[0016] 3. This utility model uses a metal compression pad tube, which can reduce the problem of explosion-proof failure in the event of a fire. Moreover, the metal compression pad tube has high structural strength, which can increase the tensile strength of the cable connector and reduce the possibility of functional failure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the cable connector provided in this embodiment of the utility model;

[0019] Figure 2 This is an exploded view of the cable connector provided in an embodiment of this utility model;

[0020] Figure 3 This is a cross-sectional view of the cable connector provided in an embodiment of the present utility model;

[0021] Figure 4 This is a cross-sectional view of the metal connector provided in an embodiment of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please refer to Figure 1 and Figure 2The present invention provides a cable connector suitable for use in explosive atmospheres, comprising a metal connector 1, a metal connector cover 2, a metal compression gasket tube 3, and a sealing tube 4. The components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 3 and Figure 4 As shown, the outer wall of the front end of the metal connector 1 is provided with a front explosion-proof external thread 14, and the outer wall of the rear end of the metal connector 1 is provided with a rear explosion-proof external thread 15.

[0025] In practical implementation, the metal connector 1 can be made of stainless steel 304. The contact surfaces of the front explosion-proof external thread 14 and the rear explosion-proof external thread 15 of the metal connector 1 both meet the H6 thread fit accuracy requirements, and the thread length is greater than the number of threads required for explosion-proof thread fit. Among them, the contact surface accuracy of the front explosion-proof external thread 14 that mates with the metal connector cover 2 can be even greater than the H6 thread fit accuracy requirements.

[0026] like Figure 4 As shown, the interior of the metal connector 1 may be provided with a front straight channel 11, a tapered channel 12 and a rear straight channel 13 connected in sequence. The diameter of the front straight channel 11 is larger than the diameter of the rear straight channel 13. The tapered channel 12 is shaped like a frustum cone, and the diameter of the tapered channel 12 gradually decreases towards the rear straight channel 13.

[0027] like Figure 2 and Figure 3 As shown, the inner wall of the metal connecting cover 2 is provided with an explosion-proof internal thread 21, and a wire-passing center hole 22 is opened at the center of the front end of the metal connecting cover 2.

[0028] In practice, the metal connecting cover 2 can be made of stainless steel 304. The contact surface of the explosion-proof internal thread 21 of the metal connecting cover 2 meets the H6 thread fit accuracy requirements, and the thread length is greater than or equal to the number of threads required for explosion-proof fit.

[0029] Preferably, to facilitate the rotational installation of the metal connector 1, the outer wall of the metal connector 1 may be provided with a first hexagonal screw head 16. Similarly, the outer wall of the metal connector cover 2 may also be provided with a second hexagonal screw head 23.

[0030] like Figure 3 As shown, during assembly, the metal connector 1 is threadedly connected to the explosion-proof internal thread 21 of the metal connector cover 2 via the explosion-proof external thread 14 at the front end. The metal compression pad tube 3 and the sealing tube 4 are sequentially installed in the straight channel 11 at the front end of the metal connector 1. The front end of the metal compression pad tube 3 contacts the front end of the inner part of the metal connector cover 2, and the rear end of the metal compression pad tube 3 contacts the front end of the metal sealing tube 4. The rear end of the metal sealing tube 4 is placed in the tapered channel 12.

[0031] In this embodiment, preferably, the sealing tube 4 can be made of high-temperature resistant fluororubber. The metal compression pad tube 3 can be made of stainless steel 304, which can reduce the problem of explosion-proof failure in the event of a fire. Moreover, the high structural strength of the metal compression pad tube can increase the tensile strength of the cable connector and reduce the possibility of functional failure.

[0032] like Figure 2 and Figure 3 As shown, the outer wall of the metal connector 1 may also be fitted with an O-shaped sealing washer 5 located behind the first hexagonal screw head. Preferably, the sealing washer 5 can be made of high-temperature resistant silicone.

[0033] like Figure 3 As shown, when the metal connecting cover 2 is tightened, the metal connecting cover 2 can push the metal compression pad tube 3 to move towards the metal sealing tube 4, so that the metal compression pad tube 3 squeezes the metal sealing tube 4, thereby causing the rear end of the metal sealing tube 4 to shrink and deform at the inner wall of the tapering channel 12, and then sealing and fixing the introduced cable through the metal sealing tube 4.

[0034] When the explosion-proof cable connector is connected to electrical equipment that conforms to the explosion-proof contact surface, there will be no risk of explosion to the outside even if a spark occurs inside the electrical equipment.

[0035] When this explosion-proof cable connector is connected to electrical equipment that conforms to explosion-proof contact surfaces, it will not allow water to enter even after short-term immersion, provided that the waterproof performance of the electrical equipment is guaranteed, thus increasing the performance of outdoor installations.

[0036] In summary, this utility model is an improvement on the heavy-duty connector according to explosion-proof standards. It is an explosion-proof cable connector for use in high-requirement sealed explosion-proof environments. It can be installed at the connection between the explosion-proof cable port and the explosion-proof electrical equipment to provide sealing and explosion-proof protection. It has the advantages of superior explosion-proof performance, safe and reliable structure, good tensile strength, simple and convenient installation, and high protection level.

[0037] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A cable connector suitable for use in explosive atmospheres, characterized in that: The device includes an explosion-proof metal connector, an explosion-proof metal connector cover, a hollow metal compression gasket tube, and a hollow sealing tube. The metal connector's interior has a front straight channel, a tapering channel, and a rear straight channel connected in sequence. The diameter of the front straight channel is larger than the diameter of the rear straight channel. The tapering channel is truncated cone-shaped, and its diameter gradually decreases towards the rear straight channel. The outer wall of the front end of the metal connector has a front explosion-proof external thread, the outer wall of the rear end of the metal connector has a rear explosion-proof external thread, and the inner wall of the metal connector cover has an explosion-proof internal thread. The metal connector connects to the metal connector cover via the front explosion-proof external thread. The explosion-proof internal thread enables threaded connection. A wire-passing center hole is opened in the middle of the front end of the metal connector cover. The metal compression pad tube and the sealing tube are installed in the straight channel at the front end of the metal connector in sequence. The front end of the metal compression pad tube is in contact with the inner front end of the metal connector cover, and the rear end of the metal compression pad tube is in contact with the front end of the metal sealing tube. The rear end of the metal sealing tube is placed in the tapering channel. When the metal connector cover is tightened and rotated, it can push the metal compression pad tube to move towards the metal sealing tube, so that the metal compression pad tube squeezes the metal sealing tube, thereby causing the rear end of the metal sealing tube to shrink and deform at the inner wall of the tapering channel.

2. A cable connector suitable for use in explosive atmospheres according to claim 1, characterized in that: The metal connector is made of 304 stainless steel. The contact surfaces of the explosion-proof external threads at the front and rear ends of the metal connector meet the H6 thread fit accuracy requirements, and the thread length is greater than the number of threads required for explosion-proof fit.

3. A cable connector suitable for use in explosive atmospheres according to claim 1, characterized in that: The outer wall of the metal connector is provided with a first hexagonal screw.

4. A cable connector suitable for use in explosive atmospheres according to claim 1, characterized in that: The metal connecting cover is made of stainless steel 304. The contact surface of the explosion-proof internal thread of the metal connecting cover meets the H6 thread fit accuracy requirement, and the thread length is greater than or equal to the number of threads required for explosion-proof fit.

5. A cable connector suitable for use in explosive atmospheres according to claim 1, characterized in that: The outer wall of the metal connecting cover is provided with a second hexagonal screw.

6. A cable connector suitable for use in explosive atmospheres according to claim 1, characterized in that: The sealing tube is made of high-temperature resistant fluororubber.

7. A cable connector suitable for use in explosive atmospheres according to claim 1, characterized in that: The metal compression pad tube is made of stainless steel 304.

8. A cable connector suitable for use in explosive atmospheres according to claim 1, characterized in that: The outer wall of the metal connector is fitted with an O-shaped sealing gasket located behind the first hexagonal screw head.

9. A cable connector suitable for use in explosive atmospheres according to claim 8, characterized in that: The sealing gasket is made of high-temperature resistant silicone.

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