High-sealing-performance inner wall air groove steel pipe for pneumatic conveying

Abstract

The utility model relates to the related technical field of pneumatic conveying, in particular to a high-sealing-performance pneumatic conveying inner wall air groove steel pipe which comprises a first steel pipe and a second steel pipe, the first steel pipe is a straight pipe, the second steel pipe is a straight pipe with an elbow, and a positioning thread groove is formed in the inner wall of the second steel pipe. Two arc-shaped grooves are formed in the surface of each of the first steel pipe and the second steel pipe, and a sealing assembly is fixedly connected between the first steel pipe and the second steel pipe. According to the high-sealing-performance pneumatic conveying inner wall air groove steel pipe, through the arrangement of the sealing assembly, when the high-sealing-performance pneumatic conveying inner wall air groove steel pipe is used, extrusion grooves in the inner walls of an upper arc-shaped plate and a lower arc-shaped plate can be matched with arc-shaped grooves to extrude a rubber sealing ring and an annular air bag ring, and the effect of deformation of the rubber sealing ring and expansion of the annular air bag ring is utilized; the air tightness between the first steel pipe and the second steel pipe is improved, it can be guaranteed that the negative pressure in the pipeline does not change in the pneumatic conveying process, and therefore the stability of pneumatic conveying is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic conveying technology, and in particular to a steel pipe with an inner wall air groove for high-sealing pneumatic conveying. Background Technology

[0002] Pneumatic conveying, also known as airflow conveying, utilizes the energy of airflow to transport granular materials along the airflow direction within a closed pipeline. It is a specific application of fluidization technology. Pneumatic conveying devices have a simple structure and are easy to operate. They can convey materials horizontally, vertically, or at an angle. During the conveying process, physical operations such as heating, cooling, drying, and airflow classification, or certain chemical operations, can be performed simultaneously. Pneumatic conveying can be further divided into three types: dilute phase conveying, dense phase conveying, and negative pressure conveying. Negative pressure conveying involves a pipeline pressure lower than atmospheric pressure, self-priming, but requires unloading under negative pressure, and has a shorter conveying distance. Its advantages include lower equipment investment and load, making it one of the most common pneumatic conveying methods.

[0003] In practical applications, pneumatic conveying steel pipes typically use sealing rings at pipe connections to improve airtightness. However, these sealing rings are usually located on the inner wall of the pipe. Since different materials need to be conveyed within the pipe, these materials will directly impact and contact the sealing ring during their movement. After a certain period of use, the rubber ring may break due to friction, directly affecting the airtightness of the pipe and reducing the stability of the pneumatic conveying process. This indicates room for improvement. Utility Model Content

[0004] The purpose of this utility model is to provide a high-sealing pneumatic conveying inner wall air groove steel pipe to solve the problem mentioned in the background art that the sealing structure inside the existing pneumatic conveying steel pipe will be damaged due to friction caused by material impact after long-term use, thus affecting the airtightness of the pipeline.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-sealing pneumatic conveying inner wall air groove steel pipe, comprising a first steel pipe and a second steel pipe, wherein the first steel pipe is a straight pipe and the second steel pipe is a straight pipe with an elbow, the inner wall of the second steel pipe is provided with a positioning thread groove, the surfaces of the first steel pipe and the second steel pipe are each provided with two arc-shaped grooves, a sealing component is fixedly connected between the first steel pipe and the second steel pipe, and a wear-resistant component is fixedly connected to the inner wall of the second steel pipe;

[0006] The sealing component is used to improve the overall airtightness of the air-sealed steel pipe, and the wear-resistant component is used to increase the wear resistance of the second steel pipe.

[0007] Preferably, the sealing assembly includes an upper arc-shaped plate and a lower arc-shaped plate, and locking plates are fixedly connected to the surfaces of both the upper and lower arc-shaped plates. Two locking bolts are threadedly connected to the upper surfaces of the two locking plates, and the inner walls of the upper and lower arc-shaped plates are adapted to the diameters of the first and second steel pipes.

[0008] Preferably, the inner walls of the two arc-shaped grooves are respectively connected with rubber sealing rings and annular airbag rings, and the inner walls of the upper arc-shaped plate and the lower arc-shaped plate are provided with extrusion grooves that are compatible with the rubber sealing rings and annular airbag rings.

[0009] Preferably, an inflation tube is fixedly connected to the surface of the annular airbag ring, and an inner sealing cap is threaded to the top end of the inflation tube.

[0010] Preferably, two sleeves are fixedly connected to the surface of the upper arc plate. Circular through holes are opened on the inner wall of the upper arc plate at positions corresponding to the two sleeves, and these circular through holes communicate with the interior of the sleeves. An outer sealing cap is threaded to the top of each sleeve. The positions of the two circular through holes correspond to the positions of the two annular airbag rings, and the inner wall of the outer sealing cap is larger than the diameter of the inner sealing cap, while the inner diameter of the sleeve is larger than the diameter of the inner sealing cap.

[0011] Preferably, the wear-resistant component includes an arc-shaped steel plate that is adapted to the inner wall of the second steel pipe, and a tapered guide plate is fixedly connected to the left side of the arc-shaped steel plate.

[0012] Preferably, the side of the arc-shaped steel plate is provided with a circular hole, and a fastening bolt is inserted into the inner wall of the circular hole, and the fastening bolt is adapted to the positioning thread groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This high-sealing pneumatic conveying inner wall air groove steel pipe, through the setting of the sealing component, can utilize the extrusion grooves on the inner walls of the upper and lower arc plates to cooperate with the arc grooves, extruding the rubber sealing ring and the annular airbag ring. The deformation of the rubber sealing ring and the expansion of the annular airbag ring improve the airtightness between the first and second steel pipes, ensuring that the negative pressure inside the pipeline does not change during pneumatic conveying, thus guaranteeing the stability of pneumatic conveying. Through the setting of the wear-resistant component, during use, the material changing direction inside the second steel pipe can directly contact the arc plate instead of the inner wall of the second steel pipe, greatly reducing the wear of the second steel pipe and thus extending its service life. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a three-dimensional disassembled structural diagram of the sealing component of this utility model;

[0016] Figure 3 This is a schematic diagram of the orthographic section of the present invention;

[0017] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0018] In the diagram: 1. First steel pipe; 2. Second steel pipe; 3. Arc groove; 4. Sealing assembly; 5. Wear-resistant assembly; 401. Upper arc plate; 402. Lower arc plate; 403. Locking plate; 404. Locking bolt; 405. Rubber sealing ring; 406. Annular airbag ring; 407. Extrusion groove; 408. Inflation pipe; 409. Inner sealing cover; 410. Sleeve; 411. Outer sealing cover; 501. Arc steel plate; 502. Conical guide plate; 503. Fastening bolt. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a high-sealing pneumatic conveying inner wall air groove steel pipe, including a first steel pipe 1 and a second steel pipe 2. The first steel pipe 1 is a straight pipe, and the second steel pipe 2 is a straight pipe with an elbow. The inner wall of the second steel pipe 2 is provided with a positioning thread groove. The surfaces of the first steel pipe 1 and the second steel pipe 2 are each provided with two arc-shaped grooves 3. A sealing component 4 is fixedly connected between the first steel pipe 1 and the second steel pipe 2. A wear-resistant component 5 is fixedly connected to the inner wall of the second steel pipe 2.

[0021] The sealing component 4 is used to improve the overall air tightness of the air channel steel pipe, and the wear-resistant component is used to increase the wear resistance of the second steel pipe 2.

[0022] Furthermore, the sealing assembly 4 includes an upper arc-shaped plate 401 and a lower arc-shaped plate 402. Locking plates 403 are fixedly connected to the surfaces of both the upper arc-shaped plate 401 and the lower arc-shaped plate 402. Two locking bolts 404 are threadedly connected to the upper surfaces of the two locking plates 403. The inner walls of the upper arc-shaped plate 401 and the lower arc-shaped plate 402 are adapted to the diameters of the first steel pipe 1 and the second steel pipe 2. The upper arc-shaped plate 401 and the lower arc-shaped plate 402 can be locked at the connection between the first steel pipe 1 and the second steel pipe 2, and are fixed and limited by the locking plates 403 and the locking bolts 404.

[0023] Furthermore, the inner walls of the two arc-shaped grooves 3 are respectively connected with rubber sealing rings 405 and annular airbag rings 406. The inner walls of the upper arc-shaped plate 401 and the lower arc-shaped plate 401 are provided with extrusion grooves 407 that are adapted to the rubber sealing rings 405 and annular airbag rings 406. After the upper arc-shaped plate 401 and the lower arc-shaped plate 402 are locked by locking plate 403 and locking bolt 404, the rubber sealing rings 406 can be extruded by the extrusion grooves 407, so that the rubber sealing rings 405 deform in the arc-shaped grooves 3 and the extrusion grooves 407, thereby increasing the airtightness of the first steel pipe 1 and the second steel pipe 2.

[0024] Furthermore, an inflation tube 408 is fixedly connected to the surface of the annular airbag ring 406, and an inner sealing cap 409 is threaded to the top of the inflation tube 408. The inflation tube 408 can be used to inflate the annular airbag ring 406. After inflation, the annular airbag ring 406 expands in the arc groove 3 and the compression groove 407, thereby pressing the inner walls of the arc groove 3 and the compression groove 407 tightly. In conjunction with the rubber sealing ring 405, it can further improve the sealing effect between the first steel pipe 1 and the second steel pipe 2.

[0025] Furthermore, two sleeves 410 are fixedly connected to the surface of the upper arc plate 401. Circular through holes are opened at positions corresponding to the two sleeves 410 on the inner wall of the upper arc plate 401, and these circular through holes are connected to the interior of the sleeves 410. The top ends of the two sleeves 410 are threaded with outer sealing caps 411. The positions of the two circular through holes correspond to the positions of the two annular airbag rings 406, and the inner wall of the outer sealing cap 411 is larger than the diameter of the inner sealing cap 409. The inner diameter of the sleeve 410 is larger than the diameter of the inner sealing cap 409. The inflation tube 408 can pass through the circular through holes and be inserted into the sleeve 410. The outer sealing cap 411 can encompass the inner sealing cap 409. Therefore, after inflating the annular airbag ring 406 using the inflation tube 408, the double-layer seal of the inner sealing cap 409 and the outer sealing cap 411 can improve the sealing performance of the annular airbag ring 406, preventing gas leakage and a decrease in airtightness.

[0026] Furthermore, the wear-resistant component 5 includes an arc-shaped steel plate 501, which is adapted to the inner wall of the second steel pipe 2. A tapered guide plate 502 is fixedly connected to the left side of the arc-shaped steel plate 501. The overall curvature of the arc-shaped steel plate 501 fits the inner wall of the second steel pipe 2. Therefore, when the material in the second steel pipe 2 changes direction, the material directly impacts the inner wall of the arc-shaped steel plate 501 instead of contacting and rubbing against the inner wall of the second steel pipe 2. This greatly reduces the frictional wear of the second steel pipe 2, thereby extending the service life of the second steel pipe 2. In addition, the tapered guide plate 502 can prevent the material from getting stuck in the second steel pipe 2 and prevent blockage.

[0027] Furthermore, the side of the arc-shaped steel plate 501 is provided with a circular hole, and a fastening bolt 503 is inserted into the inner wall of the circular hole. The fastening bolt 503 is adapted to the positioning thread groove. The fastening bolt 503 is inserted into the circular hole and then bolted to the positioning thread groove. Therefore, during material transportation, the fastening bolt 503 as a whole will not obstruct the material in the steel pipe during the transportation process.

[0028] Working principle: First, align the extrusion grooves 407 on the inner walls of the upper arc plate 401 and the lower arc plate 402 with the rubber sealing ring 405 and the annular sealing ring 406. Pass the two inflation tubes 408 through the circular through-hole and insert them into the sleeve 410. Use the locking plate 403 and locking bolts 404 to press them firmly against the surfaces of the first steel pipe 1 and the second steel pipe 2. At this time, the rubber sealing ring 405 is compressed by the extrusion grooves 407, causing deformation within the grooves, thereby improving the airtightness between the first steel pipe 1 and the second steel pipe 2 and ensuring stable pneumatic transmission. Simultaneously, open the outer sealing cover 411 and the inner sealing cover 409, and inflate the two annular airbag rings 406 using the inflation tubes 408. After inflation, the annular airbag rings 406 expand within the extrusion grooves 407, thus completely pressing the arc groove 3 and the inner wall of the extrusion groove 407 together. After the pneumatic conveying is completed, the inner sealing cover 409 and the outer sealing cover 411 are closed. At this time, the gap between the first steel pipe 1 and the second steel pipe 2 is blocked by two sets of rubber sealing rings 405 and annular airbag rings 406, which improves the overall sealing performance during the pneumatic conveying process. Furthermore, since both sets of rubber sealing rings 405 and annular airbag rings 406 are located on the outside of the first steel pipe 1 and the second steel pipe 2, they are not affected by the friction generated during the material conveying process inside the steel pipe, thus greatly improving the airtightness extension effect. In addition, the conical guide plate 502 and the arc-shaped steel plate 501 inside the second steel pipe 2 can buffer the material changing direction to a certain extent, so that the material can directly impact the surface of the arc-shaped steel plate 501 instead of directly impacting the inner wall of the second steel pipe 2, thereby greatly improving the wear resistance of the second steel pipe 2 and extending its service life.

[0029] 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 high-sealability pneumatic conveying inner-wall-groove steel pipe comprising a first steel pipe (1) and a second steel pipe (2), characterized in that: The first steel pipe (1) is a straight pipe, the second steel pipe (2) is a straight pipe with an elbow, a positioning threaded groove is formed in the inner wall of the second steel pipe (2), two arc-shaped grooves (3) are formed in the surfaces of the first steel pipe (1) and the second steel pipe (2), a sealing assembly (4) is fixedly connected between the first steel pipe (1) and the second steel pipe (2), and a wear-resistant assembly (5) is fixedly connected to the inner wall of the second steel pipe (2). The sealing assembly (4) is used for improving the overall air tightness of the gas tank steel pipe, and the wear-resistant assembly is used for increasing the wear resistance of the second steel pipe (2).

2. A high containment pneumatic conveying inner-wall-groove steel pipe according to claim 1, characterized in that: The sealing assembly (4) comprises upper and lower arc-shaped plates (401) and (402), the surfaces of the upper and lower arc-shaped plates (401) and (402) are fixedly connected with locking plates (403), the upper surfaces of the two locking plates (403) are threadedly connected with two locking bolts (404), and the inner walls of the upper and lower arc-shaped plates (401) and (402) are matched with the diameters of the first steel pipe (1) and the second steel pipe (2).

3. The high containment pneumatic conveying inner-wall-groove steel pipe according to claim 1, characterized in that: The inner walls of the two arc-shaped grooves (3) are respectively overlapped with rubber sealing rings (405) and annular air bag rings (406), and the inner walls of the upper and lower arc-shaped plates (401) and (402) are provided with extrusion grooves (407) matched with the rubber sealing rings (405) and the annular air bag rings (406).

4. A high containment pneumatic conveying inner-wall-groove steel pipe according to claim 3, characterized in that: The surface of the annular air bag ring (406) is fixedly connected with an inflation pipe (408), and the top end of the inflation pipe (408) is threadedly connected with an inner sealing cover (409).

5. The high containment pneumatic conveying inner-wall-groove steel pipe according to claim 2, characterized in that: The surface of the upper arc-shaped plate (401) is fixedly connected with two sleeves (410), the inner wall of the upper arc-shaped plate (401) is provided with circular through holes corresponding to the two sleeves (410), the circular through holes are in communication with the interiors of the sleeves (410), the top ends of the two sleeves (410) are threadedly connected with outer sealing covers (411), the positions of the two circular through holes correspond to the positions of the two annular air bag rings (406), respectively, the inner wall of the outer sealing cover (411) is larger than the diameter of the inner sealing cover (409), and the inner diameter of the sleeve (410) is larger than the diameter of the inner sealing cover (409).

6. The high containment pneumatic conveying inner-wall-groove steel pipe according to claim 1, characterized in that: The wear-resistant assembly (5) comprises an arc-shaped steel plate (501), the arc-shaped steel plate (501) is matched with the inner wall of the second steel pipe (2), and a tapered guide plate (502) is fixedly connected to the left side of the arc-shaped steel plate (501).

7. A high containment, pneumatic conveying, inner-groove steel pipe according to claim 6, characterized in that: A circular hole is formed in the side surface of the arc-shaped steel plate (501), a fastening bolt (503) is inserted into the inner wall of the circular hole, and the fastening bolt (503) is matched with the positioning threaded groove.

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