Wear-resistant double sleeve for pneumatic conveying

Abstract

The utility model discloses a wear-resistant double sleeve for pneumatic conveying, which comprises a conveying unit, the conveying unit comprises an outer pipeline and an inner pipeline, one side of the inner pipeline is provided with a plurality of round holes, the pipe surface of the inner pipeline is fixedly connected with two linear plates which are symmetrical in position, the inner wall of the outer pipeline is fixedly connected with two connecting plates which are symmetrical in position, and the inner wall of the outer pipeline is fixedly connected with a plurality of round holes; the two linear plates are arranged between the two connecting plates in a sliding mode, and the connecting unit comprises a plurality of cylinders fixedly connected to one side of the outer pipeline. The two linear plates slide to the position between the two connecting plates, so that a worker can conveniently install the inner pipeline in the outer pipeline, when the inner pipeline and the outer pipeline are abraded and broken, the bolt is rotated to remove fixation of the inner pipeline, the worker can conveniently detach the inner pipeline from the outer pipeline, and the labor intensity of the worker is reduced. And the inner pipeline and the outer pipeline are independently repaired and maintained, so that the inner and outer walls are smoother and wear-resistant.

Description

Technical Field

[0001] The utility model relates to the technical field of double pipes, in particular to a wear-resistant double pipe for pneumatic conveying. Background Art

[0002] The wear-resistant double pipe for pneumatic conveying is a pipeline used in a pneumatic conveying system, usually composed of an inner pipe and an outer pipe. The inner pipe is responsible for conveying materials, while the outer pipe provides additional protection to increase wear resistance and extend the service life. The inner pipe is usually made of high-strength and wear-resistant materials, such as polymer (such as polyethylene, polyurethane, etc.) or steel pipes. This layer is in direct contact with and conveys materials, so it needs to have good wear resistance and a smooth inner wall to reduce friction and material loss. The outer pipe is usually made of wear-resistant and corrosion-resistant materials, which can be steel pipes or other synthetic materials. It is mainly used to protect the inner pipe, prevent mechanical damage and the influence of the external environment, and can also play a role in support and fixation.

[0003] In the existing double pipe, the inner pipe is welded to the inner wall of the outer pipe, which makes it impossible to remove the inner pipe from the outer pipe. During the long-term use of the inner pipe, the outer wall of the inner pipe rubs and impacts with the materials, resulting in scratches on the outer wall of the inner pipe. This may cause the surface of the inner pipe to crack. After cracking, the inner pipe not only has reduced strength but also greatly reduced wear resistance. Workers cannot disassemble, maintain and repair the inner pipe, making the cracked inner pipe have potential safety hazards and unable to continue to be used. Therefore, a wear-resistant double pipe for pneumatic conveying is proposed. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. In this part, as well as in the abstract and the title of the utility model of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this part, the abstract and the title of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problems existing in the existing wear-resistant double pipe for pneumatic conveying, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a wear-resistant double pipe for pneumatic conveying, which is suitable for solving the problem that in the existing double pipe, the inner pipe is welded to the inner wall of the outer pipe, and workers cannot disassemble, maintain and repair the inner pipe, making the cracked inner pipe have potential safety hazards and unable to continue to be used.

[0007] To solve the above technical problems, the present utility model provides the following technical solution: A wear-resistant double pipe for pneumatic conveying, comprising:

[0008] A conveying unit, which includes an outer pipe and an inner pipe. A plurality of round holes are formed on one side of the inner pipe. Two symmetrically positioned flat plates are fixedly connected to the pipe surface of the inner pipe. Two symmetrically positioned connecting plates are fixedly connected to the inner wall of the outer pipe. The two flat plates are respectively slidably disposed between the two connecting plates;

[0009] A connecting unit, which includes a plurality of cylinders fixedly connected to one side of the outer pipe. A bolt is threadedly connected to the end of each cylinder. A plurality of nuts are inlaid on one side of the two connecting plates. The end of each bolt sequentially penetrates through the connecting plate and the flat plate and is threadedly connected to the nut at the corresponding position. A hemispherical block is fixedly connected to one end of each nut. Rectangular grooves are formed on the inner walls of the two connecting plates. Iron blocks are rotatably connected to the inner walls of the two rectangular grooves. Rotating rods are rotatably connected to the same side of the two connecting plates. The ends of the two rotating rods penetrate into the rectangular grooves of the connecting plates and are fixedly connected to the iron blocks. Rectangular openings that fit the iron blocks are formed on the sides of the two flat plates facing the iron blocks. Magnets are fixedly connected to the inner walls of the two rectangular openings.

[0010] As a preferred solution of the double-walled wear-resistant pipe for pneumatic conveying of the present utility model, wherein: A plurality of conical cylinders are fixedly connected to the pipe surface of the inner pipe. Each conical cylinder is located on the round hole of the inner pipe.

[0011] As a preferred solution of the double-walled wear-resistant pipe for pneumatic conveying of the present utility model, wherein: A plurality of arc-shaped blocks are fixedly connected to the inner wall of the inner pipe. The plurality of arc-shaped blocks are all located on the central axis of the conical cylinder.

[0012] As a preferred solution of the double-walled wear-resistant pipe for pneumatic conveying of the present utility model, wherein: A support plate is fixedly connected to the inner wall of the conical cylinder. A round rod is rotatably connected to the side of the support plate. One end of each round rod facing the arc-shaped block penetrates through the support plate and is fixedly connected to a fan. A spiral rod is fixedly connected to the other end of each round rod away from the arc-shaped block.

[0013] As a preferred solution of the double-walled wear-resistant pipe for pneumatic conveying of the present utility model, wherein: A plurality of semi-circular pipes are fixedly connected to the inner wall of the outer pipe. The inner wall of the semi-circular pipe is arc-shaped, and the inner diameter at the center of the semi-circular pipe is smaller than the inner diameters at both ends of itself.

[0014] As a preferred solution of the double-walled wear-resistant pipe for pneumatic conveying of the present utility model, wherein: The position of each semi-circular pipe corresponds to the position of the conical cylinder. Three mutually perpendicular rhombic plates are fixedly connected to the inner wall of each semi-circular pipe.

[0015] Advantages of the present utility model: By sliding two L-shaped plates between two connecting plates to limit the position of the inner pipe within the outer pipe, and by rotating the rotating rod to make the magnet adsorb the iron block, it can prevent the inner pipe from falling off between the two connecting plates and facilitate installation by workers. When the inner pipe and the outer pipe are worn or cracked, the fixation of the inner pipe can be released by rotating the bolt, so that workers can disassemble the inner pipe from the outer pipe and separately repair and maintain the inner pipe and the outer pipe, making the inner and outer walls of the inner pipe and the outer pipe smoother, more wear-resistant and durable, thereby increasing the service life of the double pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0017] Figure 1 Schematic diagram of the overall structure of the wear-resistant double pipe for pneumatic conveying proposed by the present utility model;

[0018] Figure 2 Schematic diagram of the structure of the connection unit proposed by the present utility model;

[0019] Figure 3 Schematic diagram of the partial sectional structure of the connecting plate proposed by the present utility model;

[0020] Figure 4 Schematic diagram of the internal structure of the partial section of the inner pipe proposed by the present utility model;

[0021] Figure 5 Schematic diagram of the connection relationship between the semi-circular pipe and the diamond plate proposed by the present utility model.

[0022] BRIEF DESCRIPTION OF THE DRAWINGS: 100, conveying unit; 101, outer pipe; 102, inner pipe; 103, connecting plate; 104, L-shaped plate; 200, connection unit; 201, cylinder; 202, bolt; 203, nut; 204, hemispherical block; 205, iron block; 206, rotating rod; 207, magnet; 208, conical cylinder; 209, arc-shaped block; 210, support plate; 211, round rod; 212, fan; 213, screw rod; 214, semi-circular pipe; 215, diamond plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the above-mentioned objects, features and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific embodiments of the present utility model in conjunction with the drawings in the specification.

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0025] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments.

[0026] Furthermore, the present utility model is described in detail in conjunction with schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0027] Embodiment

[0028] Referring to Figures 1 - 5 , an embodiment of the present utility model provides a wear-resistant double pipe for pneumatic conveying, including: a conveying unit 100 and a connecting unit 200;

[0029] Among them, the conveying unit 100 includes an outer pipe 101 and an inner pipe 102. A plurality of round holes are opened on one side of the inner pipe 102. Two symmetrically positioned one-word plates 104 are fixedly connected to the pipe surface of the inner pipe 102. Two symmetrically positioned connecting plates 103 are fixedly connected to the inner wall of the outer pipe 101. The two one-word plates 104 are respectively slidably arranged between the two connecting plates 103;

[0030] The connecting unit 200 includes a plurality of cylinders 201 fixedly connected to one side of the outer pipe 101. A bolt 202 is threadedly connected to the end of each cylinder 201. A plurality of nuts 203 are inlaid on one side of the two connecting plates 103. The end of each bolt 202 sequentially penetrates through the connecting plate 103 and the one-word plate 104 and is threadedly connected to the nut 203 at the corresponding position. One end of each nut 203 is fixedly connected to a hemispherical block 204. Rectangular grooves are opened on the inner walls of the two connecting plates 103. Iron blocks 205 are rotatably connected to the inner walls of the two rectangular grooves. Rotating rods 206 are rotatably connected to the same side of the two connecting plates 103. The ends of the two rotating rods 206 penetrate into the rectangular grooves of the connecting plate 103 and are fixedly connected to the iron blocks 205. Rectangular openings that fit the iron blocks 205 are opened on one side of the two one-word plates 104 facing the iron blocks 205. Magnets 207 are fixedly connected to the inner walls of the two rectangular openings.

[0031] The double sleeve is composed of an outer pipe 101 and an inner pipe 102. During installation, sliding grooves for fitting the key-shaped plates 104 are formed on the opposite surfaces of the two connecting plates 103. When installing the inner pipe 102, the two key-shaped plates 104 of the inner pipe 102 are respectively inserted into the sliding grooves of the two connecting plates 103 to limit the inner pipe 102. Figure 4 It is an exploded schematic diagram of the positional relationship between the key-shaped plate 104 and the connecting plate 103 after partial sectioning. By rotating the rotating rod 206, the iron block 205 is rotated into the rectangular opening of the key-shaped plate 104, and the iron block 205 is adsorbed by the magnet 207, so that the iron block 205 can be stuck in the rectangular opening of the key-shaped plate 104. Thus, the key-shaped plate 104 will not slide out of the sliding groove of the connecting plate 103, facilitating the worker to install the bolt 202.

[0032] By rotating the bolt 202, it sequentially passes through the connecting plate 103 and the key-shaped plate 104 and is threadedly connected with the bolt 202. The inner pipe 102 is fixed inside the outer pipe 101 by multiple bolts 202. The hemispherical block 204 can protect the end of the bolt 202 to prevent the material from rubbing against the bolt 202 and causing blockage. When the inner pipe 102 breaks and causes unstable air pressure, the rotating rod 206 is rotated to make the magnet 207 no longer adsorb the iron block 205, and the iron block 205 is rotated into the rectangular groove of the connecting plate 103.

[0033] Then, multiple bolts 202 are sequentially removed from the cylinder 201, and then the inner pipe 102 together with the two key-shaped plates 104 can be taken out of the outer pipe 101, facilitating the worker to repair and maintain the inner pipe 102 and the outer pipe 101 separately. Both the outer pipe 101 and the inner pipe 102 can be sprayed with KNM22 acid and alkali resistant coating and polished to reduce the corrosion of the material on the outer pipe 101 and the inner pipe 102 and repair the scratches caused by the material. After repair and maintenance, the inner and outer walls of the outer pipe 101 and the inner pipe 102 are smoother and more wear-resistant, thereby improving the service life of the double sleeve.

[0034] In addition, a plurality of conical cylinders 208 are fixedly connected to the pipe surface of the inner pipe 102, and each conical cylinder 208 is located on the circular hole of the inner pipe 102. A plurality of arc-shaped blocks 209 are fixedly connected to the inner wall of the inner pipe 102, and the plurality of arc-shaped blocks 209 are all located on the central axis of the conical cylinder 208. A support plate 210 is fixedly connected to the inner wall of the conical cylinder 208, a round rod 211 is rotatably connected to the side surface of the support plate 210, one end of each round rod 211 facing the arc-shaped block 209 penetrates through the support plate 210 and is fixedly connected with a fan 212, and one end of each round rod 211 away from the arc-shaped block 209 is fixedly connected with a screw rod 213.

[0035] The multiple round holes on the inner pipe 102 are used to blow away the materials accumulated in the outer pipe 101 and enable the materials at the blowing openings to continue to be transported. The conical cylinder 208 can protect the periphery of the round holes to prevent some materials from sneaking into the inner pipe 102, thus causing blockage inside the inner pipe 102. The arc-shaped block 209 can divert the air pressure inside the inner pipe 102 so that the gas can be diverted into the conical cylinder 208. When the gas in the inner pipe 102 is being transported, it will skim over the surface of the arc-shaped block 209 and quickly pass through the conical cylinder 208. Thereby, the materials accumulated in the inner pipe 102 can be quickly blown away to ensure that the double-wall pipe can transport materials normally;

[0036] The gas in the inner pipe 102 will blow the fan 212 to rotate. The fan 212 can drive the screw rod 213 to rotate through the round rod 211. Thus, the screw rod 213 can loosen the materials accumulated in the outer pipe 101 and make the accumulated materials quickly disperse to ensure the transportation efficiency of the double-wall pipe.

[0037] Furthermore, a plurality of semi-circular pipes 214 are fixedly connected to the inner wall of the outer pipe 101. The inner wall of the semi-circular pipe 214 is arc-shaped, and the inner diameter at the center of the semi-circular pipe 214 is smaller than the inner diameters at its two ends. The position of each semi-circular pipe 214 corresponds to the position of the conical cylinder 208. Three mutually perpendicular diamond-shaped plates 215 are fixedly connected to the inner wall of each semi-circular pipe 214.

[0038] The inner wall of the semi-circular pipe 214 protrudes towards the central axis direction of the outer pipe 101. When the materials move along the inner wall of the outer pipe 101, the semi-circular pipe 214 can divert the materials at this position so that they no longer adhere to the inner wall of the outer pipe 101 and are centrally guided to the central axis of the outer pipe 101, thereby reducing the friction between the materials and the inner wall of the outer pipe 101. The semi-circular pipe 214 can extend the wear resistance of the outer pipe 101. When the materials pass through the semi-circular pipe 214, the materials will be separated by the plurality of diamond-shaped plates 215 and move dispersedly in the inner cavity of the outer pipe 101 to reduce the phenomenon that the materials are centrally transported in the outer pipe 101 and cause blockage.

[0039] During use, when installing the inner pipe 102, insert the two one-word plates 104 of the inner pipe 102 into the sliding grooves of the two connecting plates 103 respectively. Then rotate the rotating rod 206 to make its iron block 205 rotate into the rectangular opening of the one-word plate 104, and adsorb the iron block 205 through the magnet 207 so that the iron block 205 can be stuck in the rectangular opening of the one-word plate 104. Subsequently, rotate a plurality of bolts 202 in sequence to make them pass through the connecting plate 103 and the one-word plate 104 in sequence to fix the inner pipe 102 in the outer pipe 101. When conveying materials, the gas in the inner pipe 102 will blow the fan 212 to rotate. The fan 212 can drive the screw rod 213 to rotate through the round rod 211. Thus, the screw rod 213 can loosen the materials piled up in the outer pipe 101 and make the piled materials disperse quickly.

[0040] The semi-circular pipe 214 can divert the materials at the position in the outer pipe 101 so that they no longer adhere to the inner wall of the outer pipe 101, thereby reducing the friction between the materials and the inner wall of the outer pipe 101. When the inner pipe 102 ruptures and causes unstable air pressure, rotate the rotating rod 206 to rotate the iron block 205 into the rectangular groove of the connecting plate 103. Then take out a plurality of bolts 202 from the cylinder 201 in sequence. Subsequently, the inner pipe 102 together with the two one-word plates 104 can be taken out from the outer pipe 101, so that workers can repair and maintain the inner pipe 102 and the outer pipe 101 separately, and repair the scratches caused by the materials. After repair and maintenance, the inner and outer walls of the outer pipe 101 and the inner pipe 102 are smoother and more wear-resistant.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A wear-resistant double pipe for pneumatic conveying, characterized in that, Comprising: A conveying unit (100), which includes an outer pipe (101) and an inner pipe (102). A plurality of round holes are provided on one side of the inner pipe (102). Two symmetrically positioned flat plates (104) are fixedly connected to the pipe surface of the inner pipe (102). Two symmetrically positioned connecting plates (103) are fixedly connected to the inner wall of the outer pipe (101). The two flat plates (104) are respectively slidably arranged between the two connecting plates (103); A connecting unit (200), which includes a plurality of cylinders (201) fixedly connected to one side of the outer pipe (101). A bolt (202) is threadedly connected to the end of each cylinder (201). A plurality of nuts (203) are inlaid on one side of the two connecting plates (103). The end of each bolt (202) sequentially penetrates through the connecting plate (103) and the flat plate (104) and is threadedly connected to the nut (203) at the corresponding position. A hemispherical block (204) is fixedly connected to one end of each nut (203). Rectangular grooves are provided on the inner walls of the two connecting plates (103). Iron blocks (205) are rotatably connected to the inner walls of the two rectangular grooves. Rotating rods (206) are rotatably connected to the same side of the two connecting plates (103). The ends of the two rotating rods (206) penetrate into the rectangular grooves of the connecting plates (103) and are fixedly connected to the iron blocks (205). Rectangular openings that fit the iron blocks (205) are provided on the sides of the two flat plates (104) facing the iron blocks (205). Magnets (207) are fixedly connected to the inner walls of the two rectangular openings.

2. The wear-resistant double tube for pneumatic conveying according to claim 1, wherein: A plurality of conical cylinders (208) are fixedly connected to the pipe surface of the inner pipe (102). Each conical cylinder (208) is located on the round hole of the inner pipe (102).

3. The wear-resistant double sleeve for pneumatic conveying according to claim 2, characterized in that: A plurality of arc-shaped blocks (209) are fixedly connected to the inner wall of the inner pipe (102). The plurality of arc-shaped blocks (209) are all located on the central axis of the conical cylinder (208).

4. The wear-resistant double pipe for pneumatic conveying according to claim 3, characterized in that: A support plate (210) is fixedly connected to the inner wall of the conical cylinder (208). A round rod (211) is rotatably connected to the side surface of the support plate (210). The end of each round rod (211) facing the arc-shaped block (209) penetrates through the support plate (210) and is fixedly connected to a fan (212). A screw rod (213) is fixedly connected to the end of each round rod (211) away from the arc-shaped block (209).

5. The wear-resistant double sleeve for pneumatic conveying according to claim 1, wherein: A plurality of semi-circular pipes (214) are fixedly connected to the inner wall of the outer pipe (101). The inner wall of the semi-circular pipe (214) is arc-shaped, and the inner diameter at the center of the semi-circular pipe (214) is smaller than the inner diameters at both ends of itself.

6. The wear-resistant double sleeve for pneumatic conveying according to claim 5, characterized in that: The position of each semi-circular pipe (214) corresponds to the position of the conical cylinder (208). Three mutually perpendicular diamond plates (215) are fixedly connected to the inner wall of each semi-circular pipe (214).

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