Equal-inner-diameter wear-resistant expansion joint

Abstract

The utility model relates to the technical field of expansion joints, and discloses an equal-inner-diameter wear-resistant expansion joint which comprises a fixing pipe, the left side of the fixing pipe is connected with an expansion joint, the left side of the expansion joint is connected with a connecting pipe, the rear side of the fixing pipe is communicated with a hollow cover, and the bottom of the inner side of the hollow cover is connected with a spring telescopic rod. A U-shaped block is rotatably connected to the other end of the spring telescopic rod, a sealing plate is slidably connected to the top of the U-shaped block, a mounting groove is formed in the middle of the inner side of the fixing pipe, and a first porous plate is rotatably connected to the inner side of the mounting groove. According to the device, the first perforated plate is driven to rotate along the second perforated plate through circulation of a medium in the device, flow guide and abrasion reduction are achieved by adjusting flow, the movable block is driven to move through elastic potential energy of the spring, then the telescopic plate and the flange plate are driven to move, and the stability and structural strength of the device during stretching and retracting are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to an equal-inner-diameter wear-resistant expansion joint. Background Art

[0002] Expansion joints are important components widely used in industrial pipelines and equipment systems. They are mainly used to compensate for the dimensional changes of pipelines or equipment caused by factors such as temperature changes, mechanical vibrations, pressure fluctuations, and pipeline installation deviations. To improve the wear resistance of their inner diameters, an equal-inner-diameter wear-resistant expansion joint is required.

[0003] The equal-inner-diameter wear-resistant expansion joint is a key component with unique properties in the pipeline system. Its core feature is that the diameter of its internal channel always remains the same, enabling the medium to flow smoothly when passing through the expansion joint, eliminating the resistance and flow pattern changes that may be caused by pipe diameter differences. In terms of material selection and structural design, the wear resistance performance is emphasized.

[0004] At present, for the equal-inner-diameter wear-resistant expansion joints on the market, the inner diameter of the pipeline is made equal to the inner diameter of the expansion joint by adding fillers inside or removing the flow guide pipe, so as to reduce the wear by reducing the obstruction of the expansion joint to the medium. However, in actual use, the lack of flow guidance and the limitation of the medium will lead to unstable medium flow direction. In a more complex pipeline, the absence of a flow guide structure will cause the medium flow to be disordered, thereby reducing the stability of the device. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides an equal-inner-diameter wear-resistant expansion joint, aiming to improve the problem of disordered medium flow caused by the lack of a flow guide structure in the existing expansion joint.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: An equal-inner-diameter wear-resistant expansion joint, including a fixed pipe, an expansion joint is connected to the left side of the fixed pipe, a connecting pipe is connected to the left side of the expansion joint, a hollow cover is communicated with the rear side of the fixed pipe, a spring telescopic rod is connected to the inner bottom of the hollow cover, the other end of the spring telescopic rod is rotatably connected to a U-shaped block, a sealing plate is slidably connected to the top of the U-shaped block, an installation groove is opened in the middle of the inner side of the fixed pipe, a first porous plate is rotatably connected to the inner side of the installation groove, a second porous plate is rotatably connected to the left side of the first porous plate, the outer side of the second porous plate is connected to the fixed pipe, a feed port is communicated with the right side of the rear end of the inner wall of the fixed pipe, a discharge port is communicated with the left side of the rear end of the inner wall of the fixed pipe, a flange is connected to the outer sides of the fixed pipe and the connecting pipe, the front side of the sealing plate is connected to the first porous plate, and a positioning mechanism is arranged on the outer side of the flange, and the flange is used to improve the structural strength of the device during operation.

[0007] As a further description of the above technical solution:

[0008] The positioning mechanism includes a plurality of fixed blocks which are respectively connected to the upper and lower sides of the outer wall of the corresponding flange. Springs are connected to the front and rear sides of each fixed block, and the other ends of the springs are connected to moving blocks. A telescopic plate is rotatably connected to the inner side of the moving block, and a positioning frame is rotatably connected to the outer side of the telescopic plate.

[0009] As a further description of the above technical solution:

[0010] Connecting plates are connected to the peripheries of the outer walls of the fixed pipe and the connecting pipe. A bracket is connected to the outer side of the connecting plate, and the bracket is connected to the flange.

[0011] As a further description of the above technical solution:

[0012] A positioning rod is connected to the outer side of the positioning frame. The outer side of the positioning rod penetrates through the flange and is threadedly connected with a nut.

[0013] As a further description of the above technical solution:

[0014] Positioning blocks are connected to the peripheries of the outer walls of the flange. Positioning holes are formed in the outer sides of the positioning blocks.

[0015] As a further description of the above technical solution:

[0016] Handles are connected to the front and rear sides of the outer wall of the flange. Sheaths are connected to the outer sides of the handles.

[0017] As a further description of the above technical solution:

[0018] Chute grooves are formed in the upper and lower sides of the outer wall of the flange. The outer sides of the moving blocks are slidably connected to the chute grooves.

[0019] As a further description of the above technical solution:

[0020] A reserved groove is formed in the inner side of the expansion joint. A flow guide cover is rotatably connected to the inner side of the reserved groove.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, through the circulation of the medium in the device, part of the medium will enter through the feed port and exit from the discharge port. When the flow rate is fast, the amount of medium at the feed port increases while the discharge at the discharge port is limited. The weight of the medium compresses the spring telescopic rod under the sealing plate, causing the sealing plate to move downward and drive the first perforated plate to rotate along the outside of the second perforated plate. By means of the intersection and interlacing of the holes thereon, the flow rate can be adjusted according to the flow rate, which can guide the material flow and reduce the wear on the device, thereby improving the stability of the device.

[0023] 2. In the present utility model, through the elastic potential energy of the spring itself, when the spring expands and contracts, it can drive the moving block to move, so as to drive the telescopic plate thereon to rotate. Since the outer side of the telescopic plate rotates with the positioning frame, when moving through the spring, the flange plate can be driven to move simultaneously, enabling the device to move through the positioning mechanism during expansion and contraction, improving its stability and structural strength during expansion and contraction, and thus extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of an equal-inner-diameter wear-resistant expansion joint proposed by the present utility model;

[0025] Figure 2 is a front view of an equal-inner-diameter wear-resistant expansion joint proposed by the present utility model;

[0026] Figure 3 is a partial structural disassembly view of an equal-inner-diameter wear-resistant expansion joint proposed by the present utility model;

[0027] Figure 4 is a partial structural explosion view of an equal-inner-diameter wear-resistant expansion joint proposed by the present utility model;

[0028] Figure 5 is a schematic diagram of the positioning mechanism of an equal-inner-diameter wear-resistant expansion joint proposed by the present utility model.

[0029] Legend Explanation:

[0030] 1. Fixed pipe; 2. Positioning mechanism; 201. Fixed block; 202. Spring; 203. Moving block; 204. Telescopic plate; 205. Positioning frame; 3. Expansion joint; 4. Connecting pipe; 5. Installation groove; 6. First perforated plate; 7. Second perforated plate; 8. Feed inlet; 9. Hollow cover; 10. Spring telescopic rod; 11. U-shaped block; 12. Sealing plate; 13. Discharge port; 14. Positioning block; 15. Positioning hole; 16. Reserved groove; 17. Flow guide cover; 18. Nut; 19. Positioning rod; 20. Handle; 21. Sheath; 22. Bracket; 23. Connecting plate; 24. Chute; 25. Flange plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Refer to Figure 1 、 Figure 3 andFigure 4 , an embodiment provided by the present utility model: an equal-inner-diameter wear-resistant expansion joint, which includes a fixed pipe 1. The left side of the fixed pipe 1 is connected with an expansion joint 3, the left side of the expansion joint 3 is connected with a connecting pipe 4, the rear side of the fixed pipe 1 is communicated with a hollow cover 9, the inner bottom of the hollow cover 9 is connected with a spring telescopic rod 10, the other end of the spring telescopic rod 10 is rotatably connected with a U-shaped block 11, the top of the U-shaped block 11 is slidably connected with a sealing plate 12, the middle part of the inner side of the fixed pipe 1 is provided with an installation groove 5, the inner side of the installation groove 5 is rotatably connected with a first porous plate 6, the left side of the first porous plate 6 is rotatably connected with a second porous plate 7, the outer side of the second porous plate 7 is connected with the fixed pipe 1, the right side of the rear end of the inner wall of the fixed pipe 1 is communicated with a feed port 8, the left side of the rear end of the inner wall of the fixed pipe 1 is communicated with a discharge port 13, the outer sides of the fixed pipe 1 and the connecting pipe 4 are connected with a flange plate 25, the front side of the sealing plate 12 is connected with the first porous plate 6, and a positioning mechanism 2 is arranged on the outer side of the flange plate 25. The flange plate 25 is used to improve the structural strength of the device during operation.

[0033] Specifically, when the medium flows in the device, a part of the medium will enter the feed port 8 and be discharged from the discharge port 13. When the flow rate of the medium is relatively fast, the amount of medium entering the feed port 8 will increase while the amount of medium discharged through the discharge port 13 is limited. At this time, the weight of these media will compress the spring telescopic rod 10 through the sealing plate 12. When the sealing plate 12 moves downward, it will simultaneously drive the first porous plate 6 to rotate along the outer side of the second porous plate 7. By the intersection and interlacing of the holes on the first porous plate 6 and the second porous plate 7, it is possible to adjust the flow rate automatically according to the flow rate, so as to guide the medium and reduce its wear on the device at the same time.

[0034] Refer to Figure 1 , Figure 2 and Figure 5 , the positioning mechanism 2 includes a plurality of fixing blocks 201. The fixing blocks 201 are respectively connected to the upper and lower sides of the outer wall of the corresponding flange plate 25. Springs 202 are connected to the front and rear sides of the fixing blocks 201, the other ends of the springs 202 are connected with moving blocks 203, the inner sides of the moving blocks 203 are rotatably connected with telescopic plates 204, and the outer sides of the telescopic plates 204 are rotatably connected with positioning frames 205.

[0035] Specifically, through the elastic potential energy of the spring 202 itself, it can drive the moving block 203 to move when it expands and contracts, so as to drive the telescopic plate 204 thereon to rotate. Since the outer side of the telescopic plate 204 is rotatably connected with the positioning frame 205, when moving through the spring 202, it can drive the flange plate 25 to move simultaneously, so that the device can move through the positioning mechanism 2 during expansion and contraction, improving its stability and structural strength during expansion and contraction and extending its service life.

[0036] Refer to Figure 1 , Figure 2 andFigure 3 Both the outer walls of the fixed pipe 1 and the connecting pipe 4 are connected with connecting plates 23 around their circumferences. The outer sides of the connecting plates 23 are connected with brackets 22, and the brackets 22 are connected with flange plates 25; the outer side of the positioning frame 205 is connected with positioning rods 19, and the outer sides of the positioning rods 19 penetrate through the flange plates 25 and are threadedly connected with nuts 18; positioning blocks 14 are connected around the outer walls of the flange plates 25, and positioning holes 15 are opened on the outer sides of the positioning blocks 14.

[0037] Specifically, through the fixation between the connecting plates 23 and the brackets 22, the firmness of the fixation between the flange plates 25 and the fixed pipe 1 and the connecting pipe 4 can be improved. Through the positioning rods 19, the structural strength during the fixation of the device can be enhanced, and through the nuts 18, it is convenient to disassemble and assemble the positioning rods 19. By installing threaded parts in the positioning holes 15 in the positioning blocks 14, it is convenient to install and fix the device.

[0038] Refer to Figure 2 、 Figure 4 and Figure 5 Refer to

[0039] Both the front and rear sides of the outer wall of the flange plate 25 are connected with handles 20, and the outer sides of the handles 20 are connected with sheaths 21; sliding grooves 24 are opened on both the upper and lower sides of the outer wall of the flange plate 25, and the outer sides of the moving blocks 203 are slidably connected with the sliding grooves 24; a reserved groove 16 is opened inside the expansion joint 3, and a flow guide cover 17 is rotatably connected inside the reserved groove 16.

[0040] Before using this device, first, when there is a medium flowing inside the device, a part of the medium will enter the feed port 8 and be discharged from the discharge port 13. If the flow rate of the medium is relatively fast, the amount of medium entering the feed port 8 will increase, but the medium discharged from the discharge port 13 is limited. At this time, the weight of the medium will compress the spring telescopic rod 10 through the sealing plate 12. When the sealing plate 12 moves downward, it will drive the first porous plate 6 to rotate along the outside of the second porous plate 7. By virtue of the intersection and interlacing of the holes on the first porous plate 6 and the second porous plate 7, the flow rate can be automatically adjusted according to the flow rate, thereby reducing the wear of the device by the medium while guiding the medium.

[0041] Through the elastic potential energy of the spring 202 itself, during its telescopic process, it can drive the moving block 203 to move, and then drive the upper telescopic plate 204 to rotate. Since the outer side of the telescopic plate 204 is rotatably connected to the positioning frame 205, when the spring 202 moves, it can drive the flange 25 to move together, enabling the device to move with the help of the positioning mechanism 2 during telescoping, improving its stability and structural strength during telescoping, and extending the service life.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wear-resistant expansion joint with a constant inner diameter, comprising a fixed pipe (1), characterized in that: The left side of the fixed tube (1) is connected to an expansion joint (3), the left side of the expansion joint (3) is connected to a connecting tube (4), the rear side of the fixed tube (1) is connected to a hollow cover (9), the inner bottom of the hollow cover (9) is connected to a spring telescopic rod (10), the other end of the spring telescopic rod (10) is rotatably connected to a U-shaped block (11), the top of the U-shaped block (11) is slidably connected to a sealing plate (12), a mounting groove (5) is provided in the middle of the inner side of the fixed tube (1), the inner side of the mounting groove (5) is rotatably connected to a first porous plate (6), the first porous plate (6) ) is rotatably connected to a second porous plate (7) on the left side thereof, the outer side of the second porous plate (7) is connected to the fixed tube (1), the right side of the rear end of the inner wall of the fixed tube (1) is connected to a feed port (8), the left side of the rear end of the inner wall of the fixed tube (1) is connected to a discharge port (13), the fixed tube (1) and the outer side of the connecting tube (4) are connected to a flange (25), the front side of the sealing plate (12) is connected to the first porous plate (6), a positioning mechanism (2) is arranged on the outer side of the flange (25), and the flange (25) is used to enhance the structural strength of the device when it is in operation.

2. The wear-resistant expansion joint with equal inner diameter according to claim 1, characterized in that: The positioning mechanism (2) comprises a plurality of fixed blocks (201), wherein the fixed blocks (201) are respectively connected to the upper and lower sides of the outer wall of the corresponding flange (25); the front and rear sides of the fixed blocks (201) are both connected to springs (202); the other end of the spring (202) is connected to a moving block (203); the inner side of the moving block (203) is rotatably connected to a telescopic plate (204); and the outer side of the telescopic plate (204) is rotatably connected to a positioning frame (205).

3. The wear-resistant expansion joint with equal inner diameter according to claim 1, characterized in that: The outer walls of the fixed pipe (1) and the connecting pipe (4) are all connected with connecting plates (23), the outer side of the connecting plate (23) is connected with a bracket (22), and the bracket (22) is connected to the flange (25).

4. The wear-resistant expansion joint with a constant inner diameter according to claim 2, characterized in that: The outer side of the positioning frame (205) is connected to a positioning rod (19), and the outer side of the positioning rod (19) passes through the flange (25) and is threadedly connected to a nut (18).

5. The wear-resistant expansion joint with a constant inner diameter according to claim 1, characterized in that: The outer wall of the flange (25) is connected to positioning blocks (14) on all sides, and positioning holes (15) are formed on the outer sides of the positioning blocks (14).

6. The wear-resistant expansion joint with a constant inner diameter according to claim 1, characterized in that: The front and rear sides of the outer wall of the flange (25) are both connected to handles (20), and the outer side of the handle (20) is connected to a sheath (21).

7. The equal inner diameter wear-resistant expansion joint according to claim 2, characterized in that: The upper and lower sides of the outer wall of the flange (25) are both provided with sliding grooves (24), and the outer side of the moving block (203) is slidably connected to the sliding grooves (24).

8. The wear-resistant expansion joint with a constant inner diameter according to claim 1, characterized in that: A reserved groove (16) is provided on the inner side of the expansion joint (3), and a flow guide cover (17) is rotatably connected to the inner side of the reserved groove (16).

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