An explosion-proof gland connection device of a stepped seal structure

Abstract

This utility model relates to the field of gland connector technology, specifically to an explosion-proof gland connector connection device with a stepped sealing structure. It includes a gland body, an auxiliary sleeve at the bottom of the gland body, and an upper end of the auxiliary sleeve that engages with the outer wall of the bottom of the gland body via a connecting ring. The auxiliary sleeve contains an outer sealing ring and an inner sealing ring. The outer sealing ring and the auxiliary sleeve are connected by an outer guiding mechanism consisting of a strip-shaped guide seat and a strip-shaped guide bar, and the outer and inner sealing rings are connected by an inner guiding mechanism consisting of an arc-shaped guide block and an arc-shaped guide groove. This explosion-proof gland connector connection device with a stepped sealing structure improves sealing adaptability and stability through the stepped layout of multiple sealing rings, enhancing explosion-proof performance and long-term reliability.

Description

Technical Field

[0001] This utility model relates to the field of gland connector technology, specifically to an explosion-proof gland connector device with a stepped sealing structure. Background Technology

[0002] In hazardous environments such as those involving petroleum, chemicals, and natural gas, where explosive gases or dust may exist, the connection between electrical equipment and cables must possess excellent sealing and explosion-proof performance to prevent external flammable gases from entering the equipment and causing an explosion. Explosion-proof cable glands, as crucial components for cable entry and maintaining the explosion-proof performance of equipment, are widely used in various explosion-proof electrical appliances. Their main functions are to secure cables, provide mechanical protection, and ensure effective sealing and explosion-proof isolation.

[0003] Most existing explosion-proof glands adopt a single sealing ring structure, which achieves a sealing effect by tightening the sealing ring with a nut. Although this structure is simple, in practical applications, the limited contact area between the sealing ring and the outer wall of the cable and the shell makes the sealing effect greatly affected by changes in the cable diameter. This can easily lead to incomplete sealing, resulting in gas leakage and affecting the overall explosion-proof performance. At the same time, traditional structures are prone to loosening due to vibration or temperature changes during long-term use, further reducing the reliability of the seal. Utility Model Content

[0004] The purpose of this utility model is to provide an explosion-proof gland connector with a stepped sealing structure to solve the problems mentioned in the background art, such as the fact that most explosion-proof glands currently use a single sealing ring structure, the sealing effect is greatly affected by changes in cable diameter, and the sealing performance is prone to loosening due to vibration or temperature changes during long-term use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof gland connector with a stepped sealing structure, comprising a gland body, an auxiliary sleeve provided on the outer side of the bottom end of the gland body, the upper end of the auxiliary sleeve being engaged with the outer wall of the bottom end of the gland body by a connecting ring, and an outer sealing ring and an inner sealing ring respectively provided inside the auxiliary sleeve, the outer sealing ring and the auxiliary sleeve being connected by an outer guiding mechanism composed of a strip guide seat and a strip guide bar, and the outer sealing ring and the inner sealing ring being connected by an inner guiding mechanism composed of an arc-shaped guide block and an arc-shaped guide groove.

[0006] Preferably, an outer sealing ring and an inner sealing ring are respectively fitted at the bottom edge of the outer sealing ring and the inner sealing ring, and the inner diameter of the outer sealing ring is larger than the inner diameter of the inner sealing ring.

[0007] Preferably, the strip guide seats are circumferentially distributed on the inner wall of the auxiliary sleeve, and the strip guide bars are circumferentially distributed on the outer wall of the outer sealing ring, with the positions of the strip guide seats and the strip guide bars corresponding one-to-one.

[0008] Preferably, the arc-shaped guide block is uniformly fixed on the inner wall of the edge at the top of the outer sealing ring, and the arc-shaped guide groove is uniformly opened on the outer wall of the inner sealing ring.

[0009] Preferably, the inner wall of the connecting ring is symmetrically provided with an elastic insert of an arc-shaped structure, and the outer wall of the lower end of the gland body is provided with an arc-shaped groove that matches the structure of the elastic insert.

[0010] Preferably, the upper part of the auxiliary sleeve is provided with a perforation that matches the structure of the gland body, and the connecting ring is provided on the top of the perforation in the upper part of the gland body.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: the explosion-proof gland connector device with a stepped sealing structure improves sealing adaptability and stability through the stepped layout of multi-stage sealing rings, enhancing explosion-proof performance and long-term reliability. The device uses an outer sealing ring and an inner sealing ring in cooperation, with outer and inner sealing rings of different inner diameters respectively embedded at their bottom ends to accommodate the installation requirements of various cable specifications. Simultaneously, the strip guide seat and strip guide bar in the outer guide mechanism, and the arc-shaped guide block and arc-shaped guide groove in the inner guide mechanism work together to ensure that each sealing ring slides synchronously and is subjected to uniform force during compression, significantly improving the overall stability and explosion-proof safety of the sealing structure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the explosion-proof gland head connection device with a stepped sealing structure according to this utility model;

[0013] Figure 2 This is a schematic diagram of the auxiliary sleeve, outer sealing ring, and inner sealing ring sequentially connected in a stepped sealing structure explosion-proof gland connector of this utility model.

[0014] Figure 3 This is a schematic diagram of the internal structure of the connecting ring of the explosion-proof gland head connection device with a stepped sealing structure according to this utility model;

[0015] Figure 4 This is a schematic diagram of the auxiliary sleeve and the main body of the explosion-proof gland head connection device with a stepped sealing structure according to this utility model.

[0016] In the diagram: 1. Gland head body; 2. Auxiliary sleeve; 3. Connecting ring; 4. Outer sealing ring; 5. Inner sealing ring; 6. Outer sealing ring; 7. Inner sealing ring; 8. Arc-shaped guide block; 9. Strip guide seat; 10. Strip guide bar; 11. Elastic insert. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4This utility model provides a technical solution: an explosion-proof gland connector with a stepped sealing structure, comprising a gland body 1. The gland body 1 is cylindrical in shape and mainly consists of four parts: a cable through-hole, an external thread section, and a bottom connecting end. The cable through-hole is located in the center for cable insertion, the external thread section is located in the middle for connection with the equipment interface, and the bottom connecting end is used for connection with other structures. An auxiliary sleeve 2 is provided on the outer side of the bottom end of the gland body 1. The upper end of the auxiliary sleeve 2 is engaged with the outer wall of the bottom end of the gland body 1 by a connecting ring 3. The auxiliary sleeve 2 is provided with an outer sealing ring 4 and an inner sealing ring 5. An outer sealing ring 6 and an inner sealing ring 7 are fixedly fitted at the bottom edge of the outer sealing ring 4 and the inner sealing ring 5, respectively. The inner diameter of the outer sealing ring 6 is larger than that of the inner sealing ring 7. The outer sealing ring 4 and the auxiliary sleeve 2 are connected by an outer guiding mechanism consisting of a strip guide seat 9 and a strip guide bar 10. The outer sealing ring 4 and the inner sealing ring 5 are connected by an inner guiding mechanism consisting of an arc-shaped guide block 8 and an arc-shaped guide groove. This structure allows the cable to pass through the gland body 1, and the auxiliary sleeve 2 to be fixed at the bottom of the gland body 1 and axially positioned via a connecting ring 3. The outer sealing ring 4 and the inner sealing ring 5 form a stepped multi-stage sealing system within the auxiliary sleeve 2. The outer sealing ring 6 and the inner sealing ring 7 contact the outer wall of the cable and apply sealing pressure. Due to the different inner diameters of the outer sealing ring 6 and the inner sealing ring 7, they can adapt to different... To meet the installation requirements of cables of the same diameter and achieve step-by-step sealing during compression, the outer sealing ring 4 can slide stably up and down along the inside of the auxiliary sleeve 2 via an outer guide mechanism composed of a strip guide seat 9 and a strip guide bar 10 to adjust the position of the outer sealing ring 6. Meanwhile, the inner sealing ring 5 can slide stably up and down along the inside of the outer sealing ring 4 via an inner guide mechanism composed of an arc-shaped guide block 8 and an arc-shaped guide groove to adjust the position of the inner sealing ring 7. This ensures that the outer sealing ring 6 and the inner sealing ring 7 can synchronously adhere to the outer wall of the cable during compression and be uniformly stressed axially, forming a multi-point contact, step-by-step enhanced sealing effect. Overall, this device not only improves the guiding accuracy and structural stability of the sealing assembly during assembly and use, but also... This design effectively avoids sealing failures caused by misalignment, jamming, or loosening, significantly enhancing the sealing reliability and explosion-proof performance of the explosion-proof gland under complex working conditions. It solves the problems of poor adaptability, easy leakage, and insufficient long-term stability of existing single-seal structures. The strip guide seats 9 are circumferentially distributed on the inner wall of the auxiliary sleeve 2, and the strip guide bars 10 are circumferentially distributed on the outer wall of the outer sealing ring 4. The positions of the strip guide seats 9 and strip guide bars 10 correspond one-to-one. With this structure, when the outer sealing ring 4 extends downwards along the interior of the auxiliary sleeve 2, the strip guide bars 10 slide synchronously along the guiding direction of the strip guide seats 9, enabling the outer sealing ring 4 to move stably along the axial direction of the auxiliary sleeve 2, preventing misalignment, tilting, or jamming during compression.To ensure the outer sealing ring 4 maintains good alignment and motion stability throughout the entire stress process and guarantee the sealing effect, a damping pad is bonded and fixed to the inner wall of the strip guide seat 9. This increases the friction between the contact surfaces of the strip guide seat 9 and the strip guide bar 10, thereby improving the stability of the outer sealing ring 4 after it moves. Four arc-shaped guide blocks 8 are provided, and the four arc-shaped guide blocks 8 are evenly welded and fixed to the inner wall of the edge at the top of the outer sealing ring 4. Arc-shaped guide grooves are evenly opened on the outer wall of the inner sealing ring 5. The positions of the arc-shaped guide grooves and the arc-shaped guide blocks 8 are one-to-one. With this structure, when the inner sealing ring 5 slides up and down along the inside of the outer sealing ring 4, the arc-shaped guide blocks 8 will slide synchronously in the arc-shaped guide grooves on the outer wall of the inner sealing ring 5. This ensures that the inner sealing ring 5 and the outer sealing ring 4 maintain good axial alignment and motion consistency, preventing uneven sealing pressure or local failure caused by offset or misalignment, thereby improving the stability and sealing reliability of the entire sealing structure. The inner wall of the connecting ring 3 is symmetrically welded with an arc-shaped elastic insert 11. The elastic insert 11 can be made of elastic and wear-resistant rubber or engineering plastic. The outer wall of the lower end of the gland body 1 has an arc-shaped groove that matches the structure of the elastic insert 11. The upper part of the auxiliary sleeve 2 has a through hole that matches the structure of the gland body 1. The connecting ring 3 is located at the top of the through hole in the upper part of the gland body 1 and forms an integral structure with the gland body 1. This structure allows the connecting ring 3 to engage with the arc-shaped groove on the lower outer wall of the gland body 1 through the elastic insert 11 on its inner wall, ensuring that the connecting ring 3 is stably fixed at the bottom of the gland body 1. The through hole at the upper end of the auxiliary sleeve 2 can be smoothly fitted onto the outside of the bottom end of the gland body 1, ensuring that the connection between the auxiliary sleeve 2 and the gland body 1 is both firm and easy to disassemble, improving overall assembly efficiency and structural stability, and preventing loosening or detachment due to vibration or pressure changes.

[0019] Working principle: When using the explosion-proof gland connector with this stepped sealing structure, the auxiliary sleeve 2 is first fitted onto the bottom of the gland body 1 through the connecting ring 3. The elastic insert 11 on the inner wall of the connecting ring 3 is then inserted into the arc-shaped groove on the lower outer wall of the gland body 1, achieving initial fixation and axial positioning between the auxiliary sleeve 2 and the gland body 1. After the cable passes through the cable hole in the center of the gland body 1, the outer sealing ring 4 can slide with the strip guide 10 and the strip guide seat 9 to achieve axial position adjustment inside the auxiliary sleeve 2. Meanwhile, the inner sealing ring 5 slides with the arc-shaped guide groove on its outer wall and the arc-shaped guide block 8 to achieve axial position adjustment inside the outer sealing ring 4. This allows the outer sealing ring 6 and the inner sealing ring 7 to sequentially adhere to the outer wall of the cable and apply sealing pressure, forming a stepped multi-stage sealing structure, thereby completing a series of operations.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An explosion-proof Luer connector device for a stepped seal structure comprising a Luer body (1), characterized in that: The bottom of the gland body (1) is provided with an auxiliary sleeve (2). The upper end of the auxiliary sleeve (2) is engaged with the bottom outer wall of the gland body (1) by a connecting ring (3). The auxiliary sleeve (2) is provided with an outer sealing ring (4) and an inner sealing ring (5). The outer sealing ring (4) and the auxiliary sleeve (2) are connected by an outer guide mechanism composed of a strip guide seat (9) and a strip guide bar (10). The outer sealing ring (4) and the inner sealing ring (5) are connected by an inner guide mechanism composed of an arc-shaped guide block (8) and an arc-shaped guide groove.

2. The explosion-proof female luer connector of claim 1, wherein: The outer sealing ring (4) and the inner sealing ring (5) are respectively fitted with an outer sealing ring (6) and an inner sealing ring (7) at the bottom edge, and the inner diameter of the outer sealing ring (6) is larger than the inner diameter of the inner sealing ring (7).

3. The explosion-proof female luer connector of claim 1, wherein: The strip guide seat (9) is circumferentially distributed on the inner wall of the auxiliary sleeve (2), and the strip guide bar (10) is circumferentially distributed on the outer wall of the outer sealing ring (4), and the positions of the strip guide seat (9) and the strip guide bar (10) correspond one to one.

4. The explosion-proof female luer connector of claim 1, wherein: The arc-shaped guide block (8) is uniformly fixed on the inner wall of the top edge of the outer sealing ring (4), and the arc-shaped guide groove is uniformly opened on the outer wall of the inner sealing ring (5).

5. The explosion-proof female luer connector of claim 1, wherein: The inner wall of the connecting ring (3) is symmetrically provided with an elastic insert (11) with an arc-shaped structure, and the outer wall of the lower end of the gland body (1) is provided with an arc-shaped groove that matches the structure of the elastic insert (11).

6. The explosion-proof female luer connector of claim 1, wherein: The upper part of the auxiliary sleeve (2) is provided with a perforation that matches the structure of the gland body (1), and the connecting ring (3) is located on the top of the perforation in the upper part of the gland body (1).

Images