A pluggable explosion-proof joint

Abstract

The utility model relates to the technical field of explosion -proof joint, and disclose a kind of can be inserted explosion -proof joint, the both ends inside sliding connection for fixed connecting piece of explosion -proof joint, connecting piece inside installation pipeline by outer end, the surface of connecting piece is connected with nut for limiting, through the innovative cooperation mechanism of movable clamp block and clamping block, operating personnel only need to press, insert, loosen three steps to complete the installation locking of pipeline, reverse operation can quickly release limiting when disassembling, substantially improve the working efficiency of pipeline connection, small spring and reset spring constitute double elastic limiting system, movable clamp block realizes horizontal spread locking under the action of small spring, limiting block realizes vertical positioning under the action of reset spring, clamping block inside is the expansion slot of upper narrow lower wide, and wedge self-locking structure is formed with movable clamp block, with the increase of pipeline pressure, the engagement of clamping block and slot is increasingly close, further enhance the stability of connection.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof connector technology, specifically a pluggable explosion-proof connector. Background Technology

[0002] In high-risk industrial environments such as chemical, petroleum, and mining industries where flammable and explosive gases or dust exist, pluggable explosion-proof connectors are key connection components of pipeline systems, and their safety, convenience, and reliability are of paramount importance. Traditional explosion-proof connectors mostly use threaded or flanged connections, which have problems such as long installation and disassembly times and complex operations, making it difficult to meet the needs of frequent maintenance and rapid response. In recent years, although some patented technologies have improved explosion-proof connectors, they still have limitations.

[0003] For example, a Chinese patent proposes a pluggable explosion-proof connector, patent publication number CN221683910U. This patent achieves rapid connection and sealing of pipelines by adding a sealing structure and a limiting buckle. However, this patent only solves the basic connection sealing problem and does not build a dual elastic limiting system. Under harsh working conditions of strong vibration and high pressure, the connector is prone to loosening or even falling off, posing a risk of leakage. At the same time, its buckle structure lacks an adaptive adjustment mechanism and cannot enhance the connection stability according to changes in pipeline pressure. Furthermore, the introduction of electrical control components increases the potential danger of explosion caused by electric sparks.

[0004] To address the aforementioned issues, we propose a pluggable explosion-proof connector. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a pluggable explosion-proof connector, which solves the aforementioned problems.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a pluggable explosion-proof connector, comprising an explosion-proof connector, two ends of the explosion-proof connector being internally slidably connected to a fixing member, the outer end of the fixing member having a pipe installed internally, and the surface of the fixing member being threadedly connected to a nut for limiting the position, and further comprising:

[0007] A limiting structure is installed on the surface of a connector and is used to limit and fix the position of a pipeline.

[0008] Preferably, the limiting structure includes a movable locking block, a central shaft, and a small spring. The limiting block has a sliding groove inside. A central shaft for limiting is fixedly installed at the center of the sliding groove. Both ends of the central shaft are fixedly connected to the inner wall of the sliding groove. The movable locking blocks for limiting are sleeved on the surfaces of both ends of the central shaft. A small spring for resetting is sleeved between two movable locking blocks on the surface of the central shaft. Both ends of the small spring are fixedly connected to the movable locking blocks respectively.

[0009] Preferably, the two movable blocks are arranged symmetrically, and the two ends of the movable blocks extend to the outside of the limiting block.

[0010] Preferably, the surface of the connector is provided with a sliding groove corresponding to the position of the limiting block, the limiting block is disposed inside the sliding groove, a positioning post is fixedly installed at the lower center of the limiting block, a reset spring for resetting is sleeved on the surface of the positioning post, and the lower end of the reset spring is fixedly connected to the inner wall of the sliding groove.

[0011] Preferably, a locking block for fixing is installed on the surface of the connector corresponding to the position of the movable locking block. The inner end surface of the locking block is provided with a slot that matches the movable locking block, and one end of the movable locking block is installed inside the slot.

[0012] Preferably, the interior of the card slot is arranged in a gradually expanding shape from top to bottom, and the interior of the card block is provided with fixing blocks corresponding to both ends of the movable card block, and the fixing blocks are fixedly installed on both sides of the center of the movable card block.

[0013] Compared with the prior art, this utility model provides a pluggable explosion-proof connector, which has the following advantages:

[0014] 1. This pluggable explosion-proof connector, through an innovative cooperation mechanism between the movable locking block and the locking block, allows operators to complete the installation and locking of the pipeline in just three steps: pressing, inserting, and releasing. Disassembly can be performed by reversing the operation to quickly release the limit, significantly improving the efficiency of pipeline connection. The small spring and the return spring form a dual elastic limit system. The movable locking block achieves lateral expansion and locking under the action of the small spring, while the limit block achieves longitudinal positioning under the action of the return spring. This bidirectional constraint ensures that the pipeline is not easily loosened under harsh conditions such as vibration and impact, effectively avoiding leakage problems caused by connection failure. The locking block has an expanded groove that is narrower at the top and wider at the bottom, forming a wedge-shaped self-locking structure with the movable locking block. As the pipeline pressure increases, the engagement between the locking block and the groove becomes increasingly tight, further enhancing the stability of the connection.

[0015] 2. This pluggable explosion-proof connector features an expanded groove inside the snap-fit ​​block that is narrower at the top and wider at the bottom. This groove, together with the movable snap-fit ​​block, forms a wedge-shaped self-locking structure. As the pipeline pressure increases, the engagement between the snap-fit ​​block and the groove becomes increasingly tight, further enhancing the stability of the connection. The connector adopts a purely mechanical structure with no electrical components or electronic parts, fundamentally eliminating the risk of explosion caused by electrical sparks or static electricity. The tight snap-fit ​​design, combined with high-precision machining technology, ensures a reliable sealing structure between the connector and the pipeline. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2This is a partial schematic diagram of the present invention;

[0018] Figure 3 This utility model Figure 2 Side sectional view;

[0019] Figure 4 This utility model Figure 3 Diagram before installation;

[0020] Figure 5 This is a schematic diagram of the limiting structure of this utility model.

[0021] In the diagram: 1. Explosion-proof connector; 2. Connector; 3. Pipeline; 4. Nut; 5. Snap-fit ​​block; 6. Snap-fit ​​groove; 7. Limit block; 8. Return spring; 9. Positioning post; 10. Sliding groove; 11. Movable snap-fit ​​block; 12. Central shaft; 13. Small spring. Detailed Implementation

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

[0023] Please see Figure 1-5 An explosion-proof pluggable connector includes an explosion-proof connector 1, with two ends of the explosion-proof connector 1 internally slidably connected to a connector 2 for fixing, and a pipe 3 installed inside the outer end of the connector 2. The surface of the connector 2 is threaded with a nut 4 for limiting the position. It also includes a limiting structure, which is installed on the surface of the connector 2 and is used to limit and fix the position of the pipe 3. The movable locking block 11 is in an unfolded state under the elastic force of the small spring 13, and at the same time, the positioning post 9 supports the limiting block 7 to the highest position to prepare for pipe insertion. The nut 4 positions and fixes the limiting structure from the top.

[0024] Furthermore, the limiting structure includes a movable locking block 11, a central shaft 12, and a small spring 13. The limiting block 7 has a sliding groove inside, and a central shaft 12 for limiting is fixedly installed at the center of the sliding groove. The two ends of the central shaft 12 are fixedly connected to the inner wall of the sliding groove. The movable locking blocks 11 for limiting are sleeved on the two ends of the central shaft 12. A small spring 13 for resetting is sleeved between the two movable locking blocks 11 on the surface of the central shaft 12. The two ends of the small spring 13 are fixedly connected to the movable locking blocks 11 respectively. When the movable locking blocks 11 are pressed inward from both sides, the movable locking blocks 11 slide on the surface of the central shaft 12, pushing the locking block 5. One end of the movable locking block 11 enters the interior of the locking block 5. When the movable locking blocks 11 are released, the small spring 13 rebounds and pushes the movable locking blocks 11 to both sides.

[0025] Furthermore, the two movable blocks 11 are arranged symmetrically, with both ends of the movable blocks 11 extending to the outside of the limiting block 7. When one end of the movable block 11 is pushed inward, the other end of the movable block 11 moves inward in the same way.

[0026] Furthermore, a sliding groove 10 is provided on the surface of the connector 2 corresponding to the position of the limiting block 7. The limiting block 7 is located inside the sliding groove 10. A positioning post 9 is fixedly installed at the center of the lower end of the limiting block 7. A reset spring 8 for resetting is sleeved on the surface of the positioning post 9. The lower end of the reset spring 8 is fixedly connected to the inner wall of the sliding groove 10. When the limiting block 7 moves downward into the sliding groove 10, the positioning post 9 keeps the limiting block 7 moving vertically downward. When the pressure at the upper end of the limiting block 7 disappears, the reset spring 8 rebounds and pushes the limiting block 7 upward.

[0027] Furthermore, a locking block 5 for fixing is installed on the surface of the connector 2 corresponding to the position of the movable locking block 11. The inner end surface of the locking block 5 is provided with a slot 6 that matches the movable locking block 11. One end of the movable locking block 11 is installed inside the slot 6. When the locking block 5 is aligned with the movable locking block 11 and the pipeline 3 is inserted into the explosion-proof connector, the pipeline pushes the locking block 5 to slide inward.

[0028] Furthermore, the interior of the slot 6 is arranged to gradually expand from top to bottom. The interior of the snap-fit ​​block 5 is provided with fixing blocks corresponding to both ends of the movable snap-fit ​​block 11. The fixing blocks are fixedly installed on both sides of the center of the movable snap-fit ​​block 11. The gradual expansion of the slot 6 causes the movable snap-fit ​​block 11 to gradually unfold outward as it moves downward. When the movable snap-fit ​​block 11 moves to the lower end of the slot 6, the fixing blocks snap-fit ​​and fix the movable snap-fit ​​block.

[0029] Structural Description:

[0030] 1. Explosion-proof connector: The explosion-proof connector is the core structure of the entire connection system, providing a basic framework for pipeline connection. It adopts an explosion-proof design and can be used safely in flammable and explosive environments. Through its internal structure and cooperation with connectors, pipelines and other components, it achieves reliable connection and sealing functions.

[0031] 2. Connector: The connector is an intermediate component that connects the explosion-proof joint to the pipeline. It has a sliding structure at both ends, which can slide to connect with the pipeline to realize the insertion and removal of the pipeline. The surface of the connector is threaded for mating with the nut. It also serves as a mounting carrier for components such as snap-fit ​​blocks and limit blocks, and transmits the limiting action during the pipeline connection process.

[0032] 3. Pipeline: The pipeline is the channel for fluid transmission. One end of the pipeline is inserted into the explosion-proof connector and fixedly connected to the explosion-proof connector through connectors. During operation, the pipeline is subjected to the internal fluid pressure and the connection is kept stable by the limiting structure of the explosion-proof connector to ensure the safety of fluid transmission.

[0033] 4. Nut: The nut is a component used for auxiliary limiting. It has a thread inside that matches the surface of the connecting part. By rotating along the thread on the surface of the connecting part, the nut can move to the upper end of the limiting block to axially limit the limiting block and prevent it from coming off upward during operation, thereby enhancing the stability of the entire connection structure.

[0034] 5. Snap-fit ​​block: The snap-fit ​​block is a fixed structure installed on the surface of the connector. It is used to lock the pipeline in conjunction with the movable snap-fit ​​block. It has a slot at one of its inner ends. The slot gradually expands from top to bottom, providing space for the movable snap-fit ​​block to be inserted and locked. It forms a wedge-shaped self-locking structure with the movable snap-fit ​​block to enhance the stability of the connection.

[0035] 6. Slot: The slot is located inside the locking block and is the key structure for achieving mechanical locking. Its unique top-narrow and bottom-wide expansion design allows the movable locking block to expand to both sides and lock under the action of a small spring after insertion. As the pipeline pressure increases, the engagement between the locking block and the slot becomes tighter, further improving the reliability of the connection.

[0036] 7. Limiting block: The limiting block is installed in the corresponding sliding groove on the surface of the connector and can move up and down along the sliding groove. The internal sliding groove is used to install components such as the central shaft, movable locking block and small spring. The lower center is fixedly connected to the positioning column. By cooperating with the reset spring, the positioning and reset of the movable locking block can be realized. It plays a key limiting role in the process of pipeline connection and disassembly.

[0037] 8. Return spring: The return spring is sleeved on the surface of the positioning post, with its lower end fixedly connected to the inner wall of the sliding groove and its upper end supporting the limiting block. During pipeline installation, the return spring is compressed and stores elastic potential energy; during pipeline disassembly, the return spring releases elastic potential energy to push the limiting block upward, so that the entire limiting structure returns to its initial state and prepares for the next connection.

[0038] 9. Positioning pin: The positioning pin is fixedly installed at the lower center of the limit block. Its function is to provide guidance and support for the return spring, ensuring that the return spring remains stable during compression and extension, and at the same time limiting the movement trajectory of the limit block to ensure that the limit block can move up and down accurately.

[0039] 10. Sliding groove: The sliding groove is set on the surface of the connector at the position corresponding to the limit block. It is a guide structure for the movement of the limit block. Its internal space provides installation space for components such as the limit block and the return spring. By constraining the movement of the limit block, it ensures the precise cooperation between the movable block and the locking block and realizes a reliable limiting function.

[0040] 11. Movable locking blocks: The movable locking blocks are symmetrically arranged at both ends of the central axis inside the limiting block. They can rotate around the central axis or slide along the axial direction. Their two ends extend to the outside of the limiting block and can be inserted into the locking slots of the locking block. Under the action of a small spring, they can be horizontally unfolded and locked. They cooperate with the locking slots to form a mechanical locking structure to fix the pipeline and prevent it from loosening or falling off.

[0041] 12. Central shaft: The central shaft is fixedly installed at the center of the sliding groove inside the limit block, serving as the rotation or sliding fulcrum of the movable block. Its two ends are fixedly connected to the inner wall of the sliding groove, providing stable support for the movable block and ensuring that the movable block maintains structural stability during movement and locking.

[0042] 13. Small spring: The small spring is sleeved on the surface of the central shaft and located between the two movable blocks. Both ends are fixedly connected to the movable blocks. The small spring provides a reset force for the movable blocks. After the movable blocks are inserted into the slots, the spring pushes the movable blocks to unfold to both sides and locks the limit blocks in the slots, thus achieving a stable lock on the pipeline. At the same time, the movable blocks are reset when the pipeline is disassembled.

[0043] Working principle: The movable locking block 11 is in the unfolded state under the elastic force of the small spring 13. At the same time, the positioning post 9 supports the limiting block 7 to the highest position, preparing for pipe insertion. When the locking block 5 is aligned with the movable locking block 11 and the pipe 3 is inserted into the explosion-proof connector, the pipe pushes the locking block 5 to slide inward. The movable locking block 11 enters and reaches the edge of the locking block 5. Press the movable locking block 11 inward from both sides, and the movable locking block 11 slides on the surface of the central shaft 12, pushing the locking block 5. One end of the movable locking block 11 enters the interior of the locking block 5. Release the movable locking block 11, and the small spring 13 rebounds, pushing the movable locking block 11 to both sides. The movable locking block 11 unfolds inside the locking block 5 and presses down on the limiting block 7. The limiting block 7 pushes the reset spring 8 downward to move, while the positioning post 9 is compressed, thus allowing the limiting block 7 to enter the sliding groove 10. At the same time, the other end of the movable locking block 11 gradually unfolds inside the locking groove 6 while moving downward. The fixing block fixes one end of the movable locking block 11. The nut 4 is turned outward and rotates along the thread on the surface of the connector 2. The nut 4 rotates to the upper end of the limiting block 7 and limits the upper end of the limiting block 7, keeping the limiting block 7 inside the sliding groove 10.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pluggable explosion-proof connector, comprising an explosion-proof connector (1), wherein the two ends of the explosion-proof connector (1) are internally slidably connected to a connecting member (2) for fixing, a pipe (3) is installed internally at the outer end of the connecting member (2), and a nut (4) for limiting the position is threaded onto the surface of the connecting member (2), characterized in that, Also includes: The limiting structure is installed on the surface of the connector (2) and is used to limit and fix the position of the pipeline (3).

2. The pluggable explosion-proof connector according to claim 1, characterized in that: The limiting structure includes a movable locking block (11), a central shaft (12), and a small spring (13). The limiting block (7) has a sliding groove inside. The central shaft (12) for limiting is fixedly installed at the center of the sliding groove. The two ends of the central shaft (12) are fixedly connected to the inner wall of the sliding groove. The movable locking block (11) for limiting is sleeved on the surface of the two ends of the central shaft (12). The small spring (13) for resetting is sleeved between the two movable locking blocks (11) on the surface of the central shaft (12). The two ends of the small spring (13) are fixedly connected to the movable locking block (11) respectively.

3. The pluggable explosion-proof connector according to claim 2, characterized in that: The two movable blocks (11) are arranged symmetrically, and the two ends of the movable blocks (11) extend to the outside of the limiting block (7).

4. The pluggable explosion-proof connector according to claim 1, characterized in that: The surface of the connector (2) is provided with a sliding groove (10) corresponding to the position of the limiting block (7). The limiting block (7) is located inside the sliding groove (10). A positioning post (9) is fixedly installed at the center of the lower end of the limiting block (7). A reset spring (8) for resetting is sleeved on the surface of the positioning post (9). The lower end of the reset spring (8) is fixedly connected to the inner wall of the sliding groove (10).

5. The pluggable explosion-proof connector according to claim 1, characterized in that: The surface of the connector (2) is fitted with a locking block (5) for fixing at the position corresponding to the movable locking block (11). The inner end surface of the locking block (5) is provided with a slot (6) that matches the movable locking block (11). One end of the movable locking block (11) is installed inside the slot (6).

6. The pluggable explosion-proof connector according to claim 5, characterized in that: The slot (6) is arranged to gradually expand from top to bottom. The locking block (5) is provided with fixing blocks at both ends of the movable locking block (11). The fixing blocks are fixedly installed on both sides of the center of the movable locking block (11).

Images