Explosion-proof joint

Abstract

The utility model belongs to the technical field of sealing glands, and particularly relates to an anti-explosion connector which comprises a connector body, a sealing gasket and a sealing gasket. The outer wall of the pressing piece is in contact with the inner wall of the connector; the inner wall of the pressing head is provided with an internal thread matched with the connector. The sealing structure comprises a first sealing piece arranged between the connector and the pressing piece and a second sealing piece arranged in the pressing piece. Wherein the connector and the inner wall of the pressing piece are in contact with the cable, and the first sealing piece and the second sealing piece are both in contact with the cable. The beneficial effects are that two groups of sealing structures, namely the first sealing member and the second sealing member, are respectively arranged between the joint and the pressing member and in the pressing member, and a dual-sealing design is adopted to effectively prevent external media such as liquid, gas or dust from invading, thereby ensuring high sealing performance of the cable joint.

Description

Technical Field

[0001] The present application belongs to the technical field of sealing glands, and in particular to an explosion-proof joint. Background Art

[0002] Explosion-proof connectors are widely used in the fixing and protection of wires and cables in mechanical equipment electrical, marine electrical, and anti-corrosion equipment. Its main function is to fasten and seal cables to meet explosion-proof requirements. There are also cable connectors used in some special places.

[0003] The patent with announcement number CN220273299U discloses an explosion-proof cable clamping sealing joint, including a tube body, the tube body is connected to an external joint, a threading space is formed between the tube body and the external joint, a short bushing and a long bushing are arranged in the threading space, the long bushing is connected by coating epoxy resin on the inner surface of the tube body, an accommodation groove is formed on the tube body, a bushing seat is arranged in the accommodation groove, and the short bushing is clamped on the bushing seat.

[0004] The above patent uses an epoxy resin layer to achieve encapsulation with the inner wall of the tube to improve the waterproof performance. However, in actual use, the waterproof effect achieved by simply coating the inner surface of the tube with epoxy resin is not perfect and will still cause leakage, which needs to be improved. Utility Model Content

[0005] The purpose of this application is to provide an explosion-proof joint that can solve the above problems.

[0006] The purpose of this application is to provide an explosion-proof joint, comprising:

[0007] A joint, wherein an outer side of the joint is provided with an external thread;

[0008] A pressing piece, the outer wall of which contacts the inner wall of the joint;

[0009] A compression head, wherein the inner wall of the compression head is provided with an internal thread adapted to the joint;

[0010] The sealing structure comprises a first sealing member disposed between the joint and the pressing member and a second sealing member disposed in the pressing member;

[0011] The connector and the inner wall of the pressing member are in contact with the cable, and the first sealing member and the second sealing member are both in contact with the cable.

[0012] The above-mentioned explosion-proof connector includes a connector with external threads, a compression piece in close contact with the inner wall of the connector, and a compression head with an adapted internal thread. The use of the two components can ensure that the connector will not loosen or leak due to external pressure or impact when working in a harsh or explosive environment, thereby greatly improving the explosion-proof safety. By setting two sets of sealing structures, namely the first seal and the second seal, which are respectively located between the connector and the compression piece and inside the compression piece, the double sealing design effectively prevents the intrusion of external media such as liquid, gas or dust, and ensures the high sealing of the cable connection. At the same time, the direct contact between these seals and the cable further enhances the sealing effect and reduces the risk of sealing failure due to cable movement or vibration.

[0013] At the same time, the design of the external thread joint and the internal thread clamping head makes the installation of the joint simple and quick, and is also convenient for subsequent maintenance and replacement. It has significant effects and advantages in improving the explosion-proof safety of equipment, simplifying the installation and maintenance process, and broadening the scope of application.

[0014] Furthermore, the first sealing member comprises:

[0015] A fastener, comprising a ring body and a tightening claw arranged on the ring body;

[0016] A pressure ring is provided on the fastener, contacts with the tightening claw and is used to press the tightening claw;

[0017] Wherein, an abutment ring in contact with the pressure ring is arranged on the inner wall of the joint, and the abutment ring contacts and squeezes the pressure ring.

[0018] The fastener includes a ring body and a tightening claw. The ring body is used to support the tightening claw. The supporting claw has elasticity or deformability so that it can shrink or deform inward when subjected to external force. The pressure ring is placed on the fastener and is in direct contact with the tightening claw. When the pressure ring is subjected to external force, that is, when it is squeezed by the connector, it squeezes the tightening claw, causing it to shrink inward and fit tightly on the surface of the cable. The abutment ring is set on the inner wall of the connector and is in direct contact with the pressure ring. When the pressure ring is tightened, it squeezes the abutment ring. The mutual squeezing force not only enhances the contact tightness between the pressure ring and the abutment ring, but also transmits the force to the tightening claw through the pressure ring, so that the tightening claw fits more closely on the cable.

[0019] During the installation process, as the tightening force increases, the pressure ring gradually squeezes the tightening claws, causing them to shrink inward and fit tightly on the cable. At the same time, the pressure ring also squeezes the abutment ring, enhancing the stability of the entire sealing structure. Together, they form an effective sealing barrier, effectively preventing the intrusion of external media.

[0020] Furthermore: a chamber is provided between the joint and the fastener, a connecting piece is provided in the chamber, one end of the connecting piece contacts the clamping piece, the other end extends toward the pressing ring and contacts the pressing ring, and the inner wall of the connecting piece contacts the outer wall of the ring body.

[0021] A chamber is provided between the joint and the fastener to accommodate and protect the internal components. The connector is provided in the chamber, one end of which contacts the pressing member, and the other end extends toward the pressing ring and contacts the pressing ring, so that the connector can simultaneously connect and fix the pressing member and the pressing ring to form a stable structure. At the same time, the inner wall of the connector contacts the outer wall of the ring body, which enhances the connection strength between the connector and the surrounding components and makes the entire structure more stable.

[0022] Furthermore, the second sealing member comprises:

[0023] An elastic ring, arranged between the pressing member and the cable, having a semicircular cross section;

[0024] The corrugated tube is arranged between the compression piece and the cable, and its inner wall is in close contact with the cable;

[0025] Wherein, the elastic ring and the bellows are arranged at intervals.

[0026] The second seal includes an elastic ring and a bellows. The elastic ring is arranged between the compression piece and the cable. Its cross section is semicircular, which helps to provide uniform compression force while maintaining a certain elasticity. It maintains contact with the cable through its elasticity, thereby providing an additional sealing effect to prevent water, dust or other contaminants from entering the cable connection. The bellows is arranged between the compression piece and the cable, and its inner wall is in close contact with the cable, ensuring close contact between the cable and the bellows, thereby improving the sealing performance, protecting the connection with the cable from erosion by the external environment, and reducing the risk of damage to the cable. The combination of the elastic ring and the bellows provides multi-level sealing protection for the cable connection, ensuring the safe operation and long-term stability of the cable.

[0027] Furthermore, the clamping member is provided with a mounting ring groove for mounting the elastic member, and the inner wall of the clamping member is provided with a clamping groove for mounting the corrugated tube.

[0028] The mounting ring groove is arranged on the clamping member, which can provide a mounting base for the elastic member and be used to fix and install the elastic member. When the clamping member is tightened, the elastic member can remain in the correct position without displacement or falling off, and can play its sealing role.

[0029] Furthermore, a sealing ring is provided between the pressing head and the joint.

[0030] The sealing effect can be further improved by arranging a sealing ring between the compression head and the joint. The sealing ring material can be rubber, silicone, polytetrafluoroethylene, etc.

[0031] The beneficial effects of this application are:

[0032] 1. By setting two sets of sealing structures, namely the first seal and the second seal, which are respectively located between the joint and the compression member and inside the compression member, the double sealing design effectively prevents the intrusion of external media such as liquid, gas or dust, ensuring the high sealing of the cable connection. At the same time, the direct contact between these seals and the cable further enhances the sealing effect and reduces the risk of sealing failure caused by cable movement or vibration;

[0033] 2. During the installation process, as the tightening force increases, the pressure ring gradually squeezes the tightening claws, causing them to shrink inward and fit tightly on the cable. At the same time, the pressure ring also squeezes the abutment ring, enhancing the stability of the entire sealing structure. Together, they form an effective sealing barrier, effectively preventing the intrusion of external media;

[0034] 3. The combination of elastic rings and bellows provides multi-level sealing protection for cable connections, ensuring safe operation and long-term stability of the cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the connection structure between the utility model and the cable;

[0036] Figure 2 It is a structural schematic diagram of the utility model.

[0037] The reference numerals in the figure are: 100, joint; 200, clamping member; 300, clamping head; 400, first sealing member; 410, fastener; 411, ring body; 412, tightening claw; 420, pressure ring; 430, abutment ring; 440, chamber; 450, connecting member; 500, second sealing member; 510, elastic ring; 520, bellows; 530, mounting ring groove; 540, slot; 600, sealing ring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0039] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0040] The explosion-proof joint provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0041] Embodiment 1:

[0042] like Figure 1 and Figure 2 As shown, the embodiment of the present application provides an explosion-proof joint, comprising:

[0043] A connector 100, wherein the outer side of the connector 100 is provided with an external thread;

[0044] A pressing member 200, wherein the outer wall of the pressing member 200 contacts the inner wall of the joint 100;

[0045] A compression head 300, wherein the inner wall of the compression head 300 is provided with an internal thread adapted to the joint 100;

[0046] The sealing structure includes a first sealing member 400 disposed between the joint 100 and the pressing member 200 and a second sealing member 500 disposed in the pressing member 200;

[0047] The inner walls of the connector 100 and the pressing member 200 are in contact with the cable, and the first sealing member 400 and the second sealing member 500 are in contact with the cable.

[0048] In some implementations of the embodiments of the present application, Figure 1As shown, the above-mentioned explosion-proof connector includes a connector 100 with external threads, a compression piece 200 in close contact with the inner wall of the connector 100, and a compression head 300 with matching internal threads. The use of each other can ensure that it will not loosen or leak due to external pressure or impact when working in a harsh or explosive environment, thereby greatly improving the explosion-proof safety. By setting two sets of sealing structures, namely a first sealing piece 400 and a second sealing piece 500, which are respectively located between the connector 100 and the compression piece 200 and inside the compression piece 200, the double sealing design effectively prevents the intrusion of external media such as liquid, gas or dust, and ensures the high sealing of the cable connection. At the same time, the direct contact between these seals and the cable further enhances the sealing effect and reduces the risk of sealing failure caused by cable movement or vibration.

[0049] At the same time, the design of the externally threaded connector 100 and the internally threaded clamping head 300 makes the installation of the connector 100 simple and quick, and is also convenient for subsequent maintenance and replacement, which has significant effects and advantages in improving the explosion-proof safety of equipment, simplifying the installation and maintenance process, and broadening the scope of application.

[0050] Embodiment 2:

[0051] An embodiment of the present application provides an explosion-proof joint. In addition to the above-mentioned technical features, the explosion-proof joint of the embodiment of the present application also includes the following technical features.

[0052] like Figure 1 and Figure 2 As shown, the first sealing member 400 includes:

[0053] The fastener 410 includes a ring body 411 and a tightening claw 412 disposed on the ring body 411;

[0054] A pressure ring 420 is disposed on the fastener 410, in contact with the tightening claw 412 and used to press the tightening claw 412;

[0055] The inner wall of the joint 100 is provided with an abutting ring 430 in contact with the pressing ring 420 . The abutting ring 430 contacts and presses the pressing ring 420 .

[0056] In the embodiment of the present application, the fastener 410 includes a ring body 411 and a tightening claw 412, the ring body 411 is used to support the tightening claw 412, and the supporting claw has elasticity or deformability so that it can shrink or deform inward when subjected to external force. The pressure ring 420 is placed on the fastener 410 and is in direct contact with the tightening claw 412. When the pressure ring 420 is subjected to external force, that is, when it is squeezed by the connector 100, it will squeeze the tightening claw 412, so that it shrinks inward and fits tightly on the surface of the cable. The abutment ring 430 is arranged on the inner wall of the connector 100 and is in direct contact with the pressure ring 420. When the pressure ring 420 is tightened, it will squeeze the abutment ring 430. The mutual squeezing force not only enhances the contact tightness between the pressure ring 420 and the abutment ring 430, but also transmits the force to the tightening claw 412 through the pressure ring 420, so that the tightening claw 412 fits more closely on the cable.

[0057] During the installation process, as the tightening force increases, the pressure ring 420 gradually squeezes the tightening claw 412, causing it to shrink inward and fit tightly on the cable. At the same time, the pressure ring 420 also squeezes the abutment ring 430, thereby enhancing the stability of the entire sealing structure. Together, they form an effective sealing barrier, effectively preventing the intrusion of external media.

[0058] Furthermore: a chamber 440 is also arranged between the joint 100 and the fastener 410, and a connecting piece 450 is arranged in the chamber 440, one end of the connecting piece 450 contacts the clamping piece 200, and the other end extends toward the pressing ring 420 and contacts the pressing ring 420, and the inner wall of the connecting piece 450 contacts the outer wall of the ring body 411.

[0059] A chamber 440 is provided between the joint 100 and the fastener 410 for accommodating and protecting the internal components. The connector 450 is provided in the chamber 440, one end of which contacts the pressing member 200, and the other end extends toward the pressing ring 420 and contacts the pressing ring 420, so that the connector 450 can simultaneously connect and fix the pressing member 200 and the pressing ring 420 to form a stable structure. At the same time, the inner wall of the connector 450 contacts the outer wall of the ring body 411, which enhances the connection strength between the connector 450 and the surrounding components, making the entire structure more stable.

[0060] Embodiment 3:

[0061] An embodiment of the present application provides an explosion-proof joint. In addition to the above-mentioned technical features, the explosion-proof joint of the embodiment of the present application also includes the following technical features.

[0062] like Figure 1 and Figure 2 As shown, the second sealing member 500 comprises:

[0063] The elastic ring 510 is disposed between the pressing member 200 and the cable, and has a semicircular cross section;

[0064] The corrugated tube 520 is disposed between the pressing member 200 and the cable, and its inner wall is in close contact with the cable;

[0065] The elastic ring 510 and the bellows 520 are spaced apart from each other.

[0066] In the embodiment of the present application, the second sealing member 500 includes an elastic ring 510 and a bellows 520. The elastic ring 510 is arranged between the compression member 200 and the cable. Its cross section is semicircular, which helps to provide uniform compression force while maintaining a certain elasticity and maintaining contact with the cable through its elasticity, thereby providing an additional sealing effect to prevent water, dust or other contaminants from entering the cable connection. The bellows 520 is arranged between the compression member 200 and the cable, and its inner wall is in close contact with the cable, ensuring close contact between the cable and the bellows 520, thereby improving the sealing performance, protecting the connection with the cable from erosion by the external environment, and reducing the risk of damage to the cable. Through the combined use of the elastic ring 510 and the bellows 520, multi-level sealing protection is provided for the cable connection, ensuring the safe operation and long-term stability of the cable.

[0067] Furthermore, the pressing member 200 is provided with a mounting annular groove 530 for mounting the elastic member, and the inner wall of the pressing member 200 is provided with a clamping groove 540 for mounting the bellows 520 .

[0068] The mounting ring groove 530 is arranged on the clamping member 200, and can provide a mounting base for the elastic member, and is used to fix and install the elastic member. When the clamping member 200 is tightened, the elastic member can remain in the correct position without shifting or falling off, and can play its sealing role.

[0069] Embodiment 4:

[0070] An embodiment of the present application provides an explosion-proof joint. In addition to the above-mentioned technical features, the explosion-proof joint of the embodiment of the present application also includes the following technical features.

[0071] like Figure 1 and Figure 2 As shown, a sealing ring 600 is provided between the pressing head 300 and the joint 100 .

[0072] In the embodiment of the present application, a sealing ring 600 is provided between the clamping head 300 and the joint 100 to further improve the sealing effect. The material of the sealing ring 600 may be rubber, silicone, polytetrafluoroethylene, etc.

[0073] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0074] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An explosion-proof joint, characterized in that: include: A joint (100), wherein the outer side of the joint (100) is provided with an external thread; A pressing piece (200), wherein an outer wall of the pressing piece (200) contacts an inner wall of the joint (100); A compression head (300), wherein the inner wall of the compression head (300) is provided with an internal thread adapted to the joint (100); A sealing structure comprising a first sealing member (400) arranged between a joint (100) and a pressing member (200) and a second sealing member (500) arranged inside the pressing member (200); The inner walls of the connector (100) and the pressing member (200) are in contact with the cable, and the first sealing member (400) and the second sealing member (500) are both in contact with the cable.

2. An explosion-proof joint according to claim 1, characterized in that: The first sealing member (400) comprises: A fastener (410) comprising a ring body (411) and a tightening claw (412) disposed on the ring body (411); A pressure ring (420) is disposed on the fastener (410), in contact with the tightening claw (412) and used to press the tightening claw (412); Wherein, an abutment ring (430) in contact with the pressure ring (420) is provided on the inner wall of the joint (100), and the abutment ring (430) is in contact with the pressure ring (420) and presses the pressure ring (420).

3. An explosion-proof joint according to claim 2, characterized in that: A chamber (440) is also provided between the joint (100) and the fastener (410), and a connecting piece (450) is provided in the chamber (440). One end of the connecting piece (450) contacts the pressing piece (200), and the other end extends toward the pressing ring (420) and contacts the pressing ring (420), and the inner wall of the connecting piece (450) contacts the outer wall of the ring body (411).

4. An explosion-proof joint according to claim 3, characterized in that: The second sealing member (500) comprises: An elastic ring (510) is arranged between the pressing member (200) and the cable, and has a semicircular cross section; The corrugated tube (520) is arranged between the pressing member (200) and the cable, and its inner wall is in close contact with the cable; The elastic ring (510) and the bellows (520) are arranged at intervals.

5. An explosion-proof joint according to claim 4, characterized in that: The pressing member (200) is provided with a mounting annular groove (530) for mounting an elastic member, and the inner wall of the pressing member (200) is provided with a clamping groove (540) for mounting a corrugated tube (520).

6. An explosion-proof joint according to claim 5, characterized in that: A sealing ring (600) is provided between the compression head (300) and the joint (100).

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