Leakage-proof type chemical powder pneumatic conveying pipeline connecting device

Abstract

The utility model discloses a kind of leakage-proof type chemical powder pneumatic conveying pipeline connecting devices, it is related to chemical powder pneumatic conveying technical field, to solve the current flange connection mode of bolt fastening, there is bolt loosening under long-term vibration condition, lead to the gap of connection sealing surface produces powder leakage phenomenon technical problem, including connecting pipe, the both ends of the connecting pipe are fixedly provided with the flange plate connected with the conveying pipeline pipe orifice, the plate wall of two side flange plate is fixedly provided with several bolts, the end of the bolt is threadedly connected with the nut that is consistent with the conveying pipeline pipe orifice side wall, the utility model is connected by the setting of limiting component, connecting plate and bolt limit connection, baffle consistent flange plate side, plug-in block and nut plug-in connection, can effectively limit the rotation of nut, avoid the vibration of pipeline in the process of chemical powder pneumatic conveying, lead to nut loosening, with the advantage that the stability of connection position is strengthened, reduce the probability of loosening occurrence.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic conveying technology for chemical powders, and more specifically, to a leak-proof pneumatic conveying pipeline connection device for chemical powders. Background Technology

[0002] In chemical production processes, pneumatic conveying is widely used as a highly efficient method for conveying powder materials. It utilizes the energy of airflow to transport granular materials along the airflow direction within a closed pipeline. It boasts advantages such as simple structure, convenient operation, and adaptability to various conveying directions (horizontal, vertical, or inclined). Furthermore, it can simultaneously perform physical operations such as heating, cooling, drying, and airflow classification of the materials, or certain chemical operations, during the conveying process.

[0003] However, the airflow pulsation within the pipeline during pneumatic conveying causes vibration. Traditional rigid sealing structures, such as bolted flange connections, present numerous problems under prolonged vibration. Firstly, bolts are prone to loosening, requiring frequent inspection and tightening, increasing maintenance costs and workload. Secondly, the sealing surface may misalign due to vibration, leading to decreased sealing performance and powder leakage. Leakage of chemical powders not only wastes materials but also poses risks to the production environment and the health of operators, as well as safety hazards. Therefore, we propose a leak-proof connection device for pneumatic conveying pipelines for chemical powders. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a leak-proof chemical powder pneumatic conveying pipeline connection device to solve the technical problem that the bolt-fastened flange connection method can loosen under long-term vibration, resulting in gaps in the connection sealing surface and powder leakage.

[0005] To solve the above technical problems, this utility model provides the following technical solution: a leak-proof chemical powder pneumatic conveying pipeline connection device, including a connecting pipe, both ends of the connecting pipe are fixedly provided with flanges that are connected to the pipe openings of the conveying pipeline, and several bolts are fixedly provided on the plate walls of the flanges on both sides, the ends of the bolts are threadedly connected with nuts that fit against the side walls of the pipe openings of the conveying pipeline, and the sides of the nuts are movably installed with limiting components to restrict the rotation of the bolts;

[0006] The limiting assembly includes a connecting plate that is connected to the bolt for limiting. One end of the connecting plate is integrally formed with a baffle that fits against the side of the flange, and the other end of the baffle is integrally formed with a plug block that is connected to the nut for plugging.

[0007] This utility model, through the setting of a limiting component, connects the connecting plate and the bolt for limiting connection, with the baffle attached to the side of the flange, and the plug-in block connected to the nut. This effectively restricts the rotation of the nut, preventing the nut from loosening due to pipeline vibration during the pneumatic conveying of chemical powders. This ensures the stability of the pipeline connection, reduces the risk of leakage caused by loose connection, and guarantees the sealing and safety of the pneumatic conveying process of chemical powders.

[0008] Preferably, the bolt has an internal groove for the insertion and displacement of the connecting plate, and the two sides of the groove near the bottom have locking grooves.

[0009] Preferably, the bottom end of the connecting plate has an integrally formed arc-shaped locking block that engages with the locking groove on both opposite sides. A first elastic cavity is provided at the middle of the bottom end of the connecting plate to facilitate the offset of the connecting plate. Arc-shaped spring pieces with opposite ends are fixedly arranged between the opposing surfaces of the first elastic cavity.

[0010] Preferably, the movable groove is further provided with a limiting groove at the middle position of the side of the locking groove, and the bottom side of the limiting groove is a downwardly inclined extrusion surface.

[0011] Preferably, the nut has a connecting slot symmetrically formed on the side where it engages with the plug block, and the bottom of the plug block has a limiting block integrally formed on the side opposite to the connecting slot, and the limiting block is semi-cylindrical, and the side wall of the plug block near the limiting block has a second elastic cavity.

[0012] Preferably, a positioning hole is provided at the center of the side of the nut that is connected to the plug block, and a positioning block that is fixedly provided at the center of the end of the plug block and is connected to the positioning hole.

[0013] Preferably, the side of the baffle that is in contact with the flange is integrally formed with a limiting protrusion that is in contact with the side opposite to the flange and the conveying pipe, and a guide slope is formed between the side of the limiting protrusion that is in contact with the bottom end.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, through the setting of a limiting component, connects the connecting plate and the bolt for limiting connection, the baffle is attached to the side of the flange, and the plug block is plugged into the nut. This can effectively limit the rotation of the nut, avoid the nut from loosening due to the vibration of the pipeline during the pneumatic conveying of chemical powder, thereby ensuring the stability of the pipeline connection, reducing the risk of leakage caused by loose connection, and ensuring the sealing and safety of the pneumatic conveying process of chemical powder.

[0016] 2. This utility model also utilizes the movable groove and locking groove inside the bolt to cooperate with the arc-shaped locking block of the connecting plate, so that the connecting plate is firmly inserted into the bolt. Combined with the limiting groove and the pressing surface, when the nut is tightened, the arc-shaped locking block is further locked under the action of the pressing surface, which enhances the connection strength between the bolt and the limiting component. At the same time, the nut and the plug-in block form a three-dimensional lock through the multiple cooperation of the connecting groove, the limiting locking block, the positioning hole and the positioning block, which prevents the plug-in block from moving laterally and longitudinally, and prevents the limiting component from loosening due to conveying vibration. This ensures that the bolt is always in an anti-loosening state, further guaranteeing the sealing performance of the connection between the flange and the conveying pipeline.

[0017] 3. This utility model also effectively controls the installation torque of the nuts through the connection between the plug block and the nut, ensuring that the installation torque of multiple nuts remains consistent. This avoids uneven stress on the flange and the conveying pipeline due to excessive or insufficient torque of individual nuts. Uniform stress ensures a tight fit between the flange and the pipeline, preventing gaps caused by weak local stress, further reducing the probability of powder leakage and ensuring the sealing performance of the conveying system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partial cross-sectional view of the present invention;

[0020] Figure 3 Figure 2 Enlarged structural diagram of section A;

[0021] Figure 4 for Figure 2 Enlarged structural diagram of section B;

[0022] Figure 5 This is a schematic diagram of the limiting component in this utility model;

[0023] Figure 6 This is a schematic diagram of the nut structure in this utility model.

[0024] Figure 7 This is a schematic diagram of one usage state of the present invention.

[0025] The following are the labels in the diagram: 1. Connecting pipe; 2. Flange; 201. Limiting plate; 3. Bolt; 301. Movable groove; 302. Locking groove; 303. Limiting slide groove; 304. Extrusion surface; 4. Nut; 401. Connecting slot; 402. Positioning hole; 5. Limiting assembly; 501. Connecting plate; 502. Arc-shaped locking block; 503. First elastic cavity; 504. Arc-shaped spring sheet; 6. Baffle; 601. Limiting protrusion; 7. Insertion block; 701. Limiting locking block; 702. Second elastic cavity; 703. Positioning block. Detailed Implementation

[0026] like Figures 1 to 7 As shown, this utility model relates to a leak-proof chemical powder pneumatic conveying pipeline connection device, including a connecting pipe 1. Both ends of the connecting pipe 1 are fixedly provided with flanges 2 that connect to the inlets of the conveying pipeline. Several bolts 3 are fixedly provided on the plate walls of both flanges 2. The ends of the bolts 3 are threadedly connected with nuts 4 that fit against the side wall of the inlet of the conveying pipeline. A limiting component 5 that restricts the rotation of the bolts 3 is movably installed on the side of the nuts 4. The limiting component 5 connecting the bolts 3 and the nuts 4 can restrict the rotation of the nuts 4, so that vibrations generated during pipeline conveying will not affect the displacement of the nuts 4, and maintain the stability of the limiting position.

[0027] The limiting component 5 includes a connecting plate 501 that is connected to the bolt 3 for limiting. One end of the connecting plate 501 has an integrally formed baffle 6 that fits against the side of the flange 2. The other end of the baffle 6 has an integrally formed plug-in block 7 that connects to the nut 4. The connection between the connecting plate 501 and the bolt 3 allows for easy up-and-down adjustment of the position of the plug-in block 7. The connection between the plug-in block 7 and the nut 4 fixes the position of the nut 4 and also limits the installation torque of the nut 4, maintaining torque uniformity. A limiting plate 201 is also fixedly installed on the side of the flange 2 where the bolt 3 is located to enhance the limiting effect of the bolt 3, ensuring the fixation of the bolt 3's position.

[0028] In this embodiment of the present invention, the bolt 3 has an internal movable groove 301 for the insertion and displacement of the connecting plate 501. The movable groove 301 has two side slots 302 near its bottom. The bottom end of the connecting plate 501 has an integrally formed arc-shaped locking block 502 that engages with the locking groove 302 on opposite sides. A first elastic cavity 503 is provided at the center of the bottom end of the connecting plate 501 to facilitate its displacement. Arc-shaped spring pieces 504 with opposite ends are fixedly disposed between the facing surfaces of the first elastic cavities 503. The movable groove 301 facilitates the insertion and displacement of the connecting plate 501. The combination of the locking groove 302 and the arc-shaped locking block 502 restricts the position of the limiting component 5. The design of the first elastic cavity 503 improves the displacement effect of the arc-shaped locking block 502, and the arc-shaped spring piece 504 strengthens the rebound and reset strength, maintaining a stable engagement position between the arc-shaped locking block 502 and the locking groove 302.

[0029] In an embodiment of this utility model, the movable groove 301 is located at the middle of the side of the locking groove 302 and a limiting slide groove 303 is also provided. The bottom side of the limiting slide groove 303 is a downwardly inclined extrusion surface 304. The design of the limiting slide groove 303 can facilitate the up and down sliding of the connecting plate 501 and reduce resistance. The extrusion surface 304 can reduce resistance when pressing down the arc-shaped locking block 502, and facilitate the adjustment of the position of the arc-shaped locking block 502 under pressure.

[0030] In the embodiments of this utility model, the nut 4 has a connecting groove 401 symmetrically formed on the side where it engages with the plug block 7. The bottom of the plug block 7 has a limiting block 701 integrally formed on the side opposite to the connecting groove 401, and the limiting block 701 is semi-cylindrical. The side wall of the plug block 7 near the limiting block 701 has a second elastic cavity 702. The engagement between the connecting groove 401 and the limiting block 701 can further improve the strength of the connection and limiting. The second elastic cavity 702 can give the limiting block 701 a good offset and reset effect.

[0031] In an embodiment of this utility model, a positioning hole 402 is provided at the center of the side where the nut 4 and the plug block 7 are joined, and a positioning block 703 is fixedly provided at the center of the end of the plug block 7, which is inserted into the positioning hole 402; the combination of the positioning block 703 and the positioning hole 402 can further enhance the stability of the connection position and improve the limiting strength of the connection.

[0032] In an embodiment of this utility model, the side of the baffle 6 that is in contact with the flange 2 is integrally formed with a limiting protrusion 601 that is in contact with the side opposite to the flange 2 and the conveying pipe, and a guide slope is constructed between the side of the limiting protrusion 601 that is in contact with the bottom end; the design of the limiting protrusion 601 can limit the two after the conveying pipe and the flange 2 are connected, so as to achieve the effect of clamping and limiting, further improving the tightness of the connection and reducing the occurrence of gaps caused by loosening of the connection position.

[0033] Working Principle: This embodiment provides a leak-proof chemical powder pneumatic conveying pipeline connection device. During pipeline connection, the flanges 2 at both ends of the connecting pipe 1 are connected to the conveying pipeline openings, and the flanges 2 are fastened to the conveying pipeline using bolts 3 and nuts 4. The connecting plate 501 in the limiting assembly 5 is connected to the bolt 3 for limiting. When the connecting plate 501 is inserted into the movable groove 301 inside the bolt 3, the arc-shaped locking block 502 at the bottom end will be locked into the locking groove 302 under the action of the arc-shaped spring piece 504 in the first elastic cavity 503, realizing a stable connection between the connecting plate 501 and the bolt 3, preventing the connecting plate 501 from easily coming out of the bolt 3. At the same time, the design of the limiting sliding groove 303 and its extrusion surface 304 in the movable groove 301 provides convenience for the installation and disassembly of the connecting plate 501. During installation, the pressing surface 304 guides the arc-shaped locking block 502 smoothly into the locking groove 302. During disassembly, by applying a certain external force to the connecting plate 501, it moves along the limiting slide groove 303, allowing the arc-shaped locking block 502 to disengage from the locking groove 302, facilitating maintenance and repair of the device. On the other hand, the baffle 6 at the end of the connecting plate 501 fits against the flange 2, and the plug-in block 7 at the other end is plugged into the nut 4. The connecting groove 401 on the side of the nut 4 engages with the limiting locking block 701 on the plug-in block 7, and in conjunction with the design of the second elastic cavity 702, ensures a tight fit between the plug-in block 7 and the nut 4. At the same time, the positioning hole 402 on the nut 4 engages with the positioning block 703 on the plug-in block 7, further ensuring the accuracy and stability of the connection between the two. After bolt 3 and nut 4 are tightened, the limiting component 5, through the aforementioned structure, restricts the rotation of bolt 3, preventing it from loosening due to factors such as pipeline vibration. This prevents gaps from appearing in the connection between flange 2 and the conveying pipeline, ensuring the sealing of the conveying pipeline and effectively preventing chemical powder leakage. Furthermore, the limiting effect of the plug block 7 restricts the installation torque of multiple nuts 4, further improving the uniformity of the limiting force and enhancing the sealing effect of the connection. In addition, the limiting protrusion 601 on the baffle 6 fits snugly against flange 2 and the conveying pipeline, and its guide slope design facilitates installation and improves the limiting effect on the connection position between flange 2 and the conveying pipeline.

[0034] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A leak-proof chemical powder pneumatic conveying pipeline connection device, comprising a connecting pipe (1), wherein both ends of the connecting pipe (1) are fixedly provided with flanges (2) connected to the inlets of the conveying pipeline, characterized in that, Several bolts (3) are fixedly installed on the plate walls of the flanges (2) on both sides. The ends of the bolts (3) are threadedly connected to nuts (4) that fit against the side wall of the conveying pipe opening. A limiting component (5) that restricts the rotation of the bolts (3) is movably installed on the side of the nuts (4). The limiting component (5) includes a connecting plate (501) that is limited and connected to the bolt (3). The end of the connecting plate (501) is integrally formed with a baffle (6) that fits against the side of the flange (2). The other end of the baffle (6) is integrally formed with a plug block (7) that is plugged into and connected to the nut (4).

2. The leak-proof chemical powder pneumatic conveying pipeline connection device according to claim 1, characterized in that, The bolt (3) has an internal movable groove (301) for the insertion displacement of the connecting plate (501), and the movable groove (301) has a locking groove (302) on both sides near the bottom.

3. The leak-proof chemical powder pneumatic conveying pipeline connection device according to claim 2, characterized in that, The bottom end of the connecting plate (501) is integrally formed with an arc-shaped locking block (502) that engages with the locking groove (302). A first elastic cavity (503) is provided at the middle of the bottom end of the connecting plate (501) to facilitate the offset of the connecting plate (501). Arc-shaped spring pieces (504) with opposite ends are fixedly arranged between the opposing surfaces of the first elastic cavity (503).

4. The leak-proof chemical powder pneumatic conveying pipeline connection device according to claim 2, characterized in that, The movable groove (301) is located at the middle of the side of the slot groove (302) and a limiting groove (303) is also provided. The bottom side of the limiting groove (303) is a downwardly inclined extrusion surface (304).

5. The leak-proof chemical powder pneumatic conveying pipeline connection device according to claim 1, characterized in that, The nut (4) has a connecting slot (401) symmetrically formed on the side where it connects with the plug block (7). The bottom of the plug block (7) is integrally formed with a limiting block (701) that engages with the connecting slot (401) on the side opposite to the side. The limiting block (701) is semi-cylindrical. The plug block (7) has a second elastic cavity (702) on the side wall near the limiting block (701).

6. The leak-proof chemical powder pneumatic conveying pipeline connection device according to claim 1, characterized in that, A positioning hole (402) is provided at the center of the side where the nut (4) and the plug block (7) are joined. A positioning block (703) is fixedly provided at the center of the end of the plug block (7) and is engaged with the positioning hole (402).

7. The leak-proof chemical powder pneumatic conveying pipeline connection device according to claim 1, characterized in that, The side of the baffle (6) that is in contact with the flange (2) is integrally formed with a limiting protrusion (601) that is in contact with the side opposite to the flange (2) and the conveying pipe, and a guide slope is constructed between the side of the limiting protrusion (601) that is in contact with the bottom end.

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