An antistatic polyurethane foam plug device

Abstract

This utility model relates to the field of sealing device technology, and in particular to an antistatic polyurethane foam sealing device, comprising a base plate, a sliding groove, an inner clamping mechanism, an outer clamping mechanism, and a sealing mechanism. The base plate has two inner clamping mechanisms slidably connected via two sliding grooves on its surface. An outer clamping mechanism is mounted on the surface of the base plate. The sealing mechanism is located at the end face of the outer tube. The inner clamping mechanism includes a moving block, a fixed sleeve, a threaded rod, a conical body, a top rod, a spring, a clamping rod, and a moving plate. By setting up the inner clamping mechanism, the user only needs to rotate the threaded rod to move the conical body. The compression of the conical body causes the top rod to drive multiple clamping rods to expand outward, thereby clamping the inner tube. Its structure is simple, with fewer moving parts, thus ensuring the overall motion accuracy and stability of the inner clamping mechanism, thereby improving the clamping and positioning accuracy of the inner tube.

Description

Technical Field

[0001] This utility model relates to the field of sealing device technology, and in particular to an antistatic polyurethane foam sealing device. Background Technology

[0002] Antistatic polyurethane foam possesses antistatic properties, making it suitable for environments such as coal mines where static electricity and harmful gas emissions need to be prevented. By adding antistatic agents, polyurethane foam materials exhibit excellent conductivity and antistatic properties, effectively preventing the generation and accumulation of static electricity and avoiding safety accidents caused by static sparks. Antistatic polyurethane foam sealing devices are used to seal polyurethane foam when filling PE outer sheath foam insulation pipes, preventing polyurethane foam from overflowing during the filling process.

[0003] According to Chinese patent CN217916422U, "A Polyurethane Foam Sealing Device," its working principle is as follows: "First, the outer tube is inserted between four lead screws. Then, the control lever is rotated clockwise. The control lever then drives the solid bevel gear to rotate, which in turn drives the hollow bevel gear to rotate. The hollow bevel gear then drives the other three solid bevel gears to rotate, causing all four solid bevel gears to rotate simultaneously. This, in turn, causes the four first rotating shafts to rotate simultaneously. Since the first rotating shafts are threadedly connected to the lead screws, and the guide rod and the fixed plate form a sliding structure, the four lead screws move closer to each other, thus limiting the outer tube without hindering its normal movement. Then, the inner tube is inserted into the outer tube. The sliding plate is then moved so that the four support rods on the sliding plate are inserted into the inner tube. Then, the handle is rotated clockwise, causing the second rotating shaft to rotate clockwise. Since the second rotating shaft has threads in opposite directions at both ends on one side of the sliding plate, and two rings are provided, with the rings threadedly connected to the second rotating shaft, the four support rods move closer to each other under the limiting groove." The movement of the inner tubes limits the movement of inner tubes of different diameters, ensuring that the central axis of the inner tube is aligned with that of the outer tube. Before the inner tube end is limited, the movable ring is first fitted onto the outside of the inner tube. Pushing the movable ring causes it to move a rubber ring towards the connection between the outer and inner tubes. Due to the elasticity of the rubber ring, it deforms, causing it to fit tightly against the inside of the outer tube and the outside of the inner tube, thus sealing the connection. Then, the fixing bolt is rotated to secure the movable ring to the inner tube. Finally, the material can be fed outwards through the feed channel. "Polyurethane foam is injected at the connection between the outer tube and the inner tube. Once the polyurethane foam dries, the outer tube and the inner tube can be removed." However, this device requires the use of multiple hinge structures when clamping the inner tube. Each hinge point has a certain amount of movement clearance and friction. Too many hinges will cause these clearances and frictions to accumulate, thus affecting the overall movement accuracy of the device. At the same time, the hinge structure is relatively weak, and too many hinges will reduce the overall stability of the device. When subjected to external forces, the clamping part is more likely to deform, thus affecting the positioning accuracy of the device. Summary of the Invention

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution: an antistatic polyurethane foam sealing device, comprising a base plate, a sliding groove, an inner clamping mechanism, an outer clamping mechanism, and a sealing mechanism. The base plate has two inner clamping mechanisms slidably connected via two sliding grooves on its surface. An outer clamping mechanism is mounted on the surface of the base plate. The sealing mechanism is located at the end face of the outer tube. The inner clamping mechanism includes a moving block, a fixed sleeve, a threaded rod, a cone, a top rod, a spring, a clamping rod, and a moving plate. A moving block is slidably connected inside the sliding groove. A moving plate is fixedly connected to the upper end of the moving block. A threaded rod is threadedly connected to the surface of the moving plate, penetrating through it. One end of the threaded rod is rotatably connected to the cone. A fixed sleeve is fixedly connected to the surface of the moving plate. Multiple top rods are slidably connected to the fixed sleeve via multiple slots on its surface. One end of each top rod is fixedly connected to a clamping rod, and the other end of the top rod smoothly contacts the cone. A spring is wound around the surface of the top rod, with one end of the spring fixedly connected to the handle end of the top rod and the other end fixedly connected to the fixed sleeve.

[0005] As an improvement to the above technical solution, the surface of the clamping rod is covered with an anti-slip rubber pad.

[0006] As an improvement to the above technical solution, the external clamping mechanism includes a fixed platform, a slide rail, a bidirectional threaded rod, a slider, a rotating disk, a limit screw, and a clamping block. The fixed platform is mounted on the surface of the base plate. Two sliders are slidably connected to the fixed platform through a slide rail on its surface. A bidirectional threaded rod is rotatably connected inside the slide rail. The bidirectional threaded rod passes through the slider and is threadedly connected to the slider. A rotating disk is fixedly connected to the shaft end of the bidirectional threaded rod. A limit screw is threadedly connected to the surface of the rotating disk. A clamping block is fixedly connected to one end of the slider.

[0007] As an improvement to the above technical solution, a V-shaped anti-slip rubber pad is attached to the V-side of the clamping block.

[0008] As an improvement to the above technical solution, the sealing mechanism includes a sliding ring, a moving ring, a sealing ring, an annular rubber sheet, a feed channel, and a fastening screw. The sliding ring is slidably disposed on the surface of the inner tube. A moving ring is fixedly connected to the surface of the sliding ring. Multiple sealing rings with different inner diameters are fixedly connected to the surface of the moving ring. An annular rubber sheet is fixedly connected to both the outer and inner surfaces of the sealing ring. A feed channel is provided inside the moving ring and passes through the moving ring. A fastening screw is threadedly connected to the surface of the sliding ring.

[0009] The beneficial effects of this utility model are as follows: the user only needs to rotate the threaded rod to drive the conical body to move. During the movement, the conical body exerts a squeezing effect on the top rod, which accurately transmits power to multiple clamping rods, causing them to expand outward synchronously, thereby achieving effective internal clamping of the inner tube. This mechanism has a simple design, greatly reduces the number of moving pairs, effectively avoids the problem of motion error accumulation caused by complex structures, significantly improves the overall motion accuracy and stability of the internal clamping mechanism, and enables the inner tube to achieve more accurate positioning during clamping, greatly improving the accuracy and reliability of clamping and positioning the inner tube. Attached Figure Description

[0010] Figure 1 This is a structural diagram of the present invention;

[0011] Figure 2 This is a structural diagram of the external clamping mechanism of this utility model;

[0012] Figure 3 This is a structural diagram of the slider of this utility model;

[0013] Figure 4 This is a structural diagram of the internal clamping mechanism of this utility model;

[0014] Figure 5 This is a diagram of the conical structure of this utility model;

[0015] Figure 6 This is a structural diagram of the sealing mechanism of this utility model;

[0016] Figure 7 This utility model Figure 6 Enlarged structural diagram at point A.

[0017] Reference numerals: 1. Base plate; 2. Slide groove; 3. Inner clamping mechanism; 31. Moving block; 32. Fixed sleeve; 33. Threaded rod; 34. Conical body; 35. Top rod; 36. Spring; 37. Clamping rod; 38. Anti-slip rubber pad; 39. Moving plate; 4. Outer clamping mechanism; 41. Fixed platform; 42. Slide rail; 43. Bidirectional threaded rod; 44. Slider; 45. Rotating disk; 46. Limit screw; 47. Clamping block; 48. V-shaped anti-slip rubber pad; 5. Sealing mechanism; 51. Sliding ring; 52. Moving ring; 53. Sealing ring; 54. Annular rubber sheet; 55. Feed channel; 56. Fastening screw; 6. Outer tube; 7. Inner tube. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0019] Please see Figure 1-7 This utility model provides a technical solution: an antistatic polyurethane foam sealing device, including a base plate 1, a slide groove 2, an inner clamping mechanism 3, an outer clamping mechanism 4, and a sealing mechanism 5. The base plate 1 is slidably connected to two inner clamping mechanisms 3 via two slide grooves 2 formed on its surface. An outer clamping mechanism 4 is installed on the surface of the base plate 1. The sealing mechanism 5 is located at the end face of the outer tube 6. The inner clamping mechanism 3 includes a moving block 31, a fixing sleeve 32, a threaded rod 33, a conical body 34, a top rod 35, a spring 36, a clamping rod 37, and a moving plate 39. The moving block 31 is slidably connected inside the slide groove 2. A movable plate 39 is fixedly connected to the upper end of the device. A threaded rod 33 is threadedly connected to the surface of the movable plate 39. A conical body 34 is rotatably connected to one end of the threaded rod 33. A fixed sleeve 32 is fixedly connected to the surface of the movable plate 39. Multiple push rods 35 are slidably connected to the fixed sleeve 32 through multiple slots on its surface. A clamping rod 37 is fixedly connected to one end of the push rod 35. The other end of the push rod 35 is in smooth contact with the conical body 34. A spring 36 is wound around the surface of the push rod 35. One end of the spring 36 is fixedly connected to the handle end of the push rod 35. The other end of the spring 36 is fixedly connected to the fixed sleeve 32.

[0020] In this embodiment, the user first uses the outer clamping mechanism 4 to clamp the outer tube 6, then inserts the inner tube 7 through the outer tube 6. The user then moves the inner clamping mechanism 3, causing the moving block 31 to slide inside the groove 2, allowing the clamping rod 37 to enter the inner tube 7. The user then rotates the threaded rod 33, causing the conical body 34 to move inside the fixed sleeve 32. The conical body 34 slides relative to the arc end of the push rod 35, thus squeezing the push rod 35 and causing multiple push rods 35 to expand outwards. Simultaneously, the spring 36 is stretched, causing multiple clamping rods 37 to expand outwards, thereby causing the clamping rods 37 to clamp the inner tube 7. The inner tube 7 is locked in place by internal clamping, making it coaxial with the outer tube 6. Then, the sealing mechanism 5 seals the connection between the outer tube 6 and the inner tube 7. Finally, material is injected between the outer tube 6 and the inner tube 7 through the holes on the surface of the sealing mechanism 5. By setting the internal clamping mechanism 3, the user only needs to rotate the threaded rod 33. The extrusion of the conical body 34 will drive the multiple clamping rods 37 to move outward through the top rod 35, thereby clamping the inner tube 7 internally. Its structure is simple and has fewer moving parts, which can ensure the overall motion accuracy and overall stability of the internal clamping mechanism 3, thereby improving the clamping and positioning accuracy of the inner tube 7.

[0021] like Figure 5 As shown, the surface of the clamping rod 37 is covered with an anti-slip rubber pad 38.

[0022] In this embodiment, the clamping rod 37 clamps the inner tube 7 through the anti-slip rubber pad 38 provided on its surface. By providing the anti-slip rubber pad 38, the friction between the clamping rod 37 and the inner wall of the inner tube 7 can be increased, thereby improving the clamping stability of the inner clamping mechanism 3 on the inner tube 7.

[0023] like Figure 2 and Figure 3 As shown, the external clamping mechanism 4 includes a fixed platform 41, a slide rail 42, a bidirectional threaded rod 43, a slider 44, a rotating disk 45, a limit screw 46, and a clamping block 47. The fixed platform 41 is mounted on the surface of the base plate 1. The fixed platform 41 is slidably connected to two sliders 44 through the slide rail 42 opened on its surface. The bidirectional threaded rod 43 is rotatably connected inside the slide rail 42. The bidirectional threaded rod 43 passes through the sliders 44 and is threadedly connected to the sliders 44. The rotating disk 45 is fixedly connected to the shaft end of the bidirectional threaded rod 43. The limit screw 46 is threadedly connected to the surface of the rotating disk 45. The clamping block 47 is fixedly connected to one end of the slider 44.

[0024] In this embodiment, when the outer tube 6 is placed between the two clamping blocks 47, the user rotates the rotating disk 45, thereby causing the bidirectional threaded rod 43 to rotate, which in turn causes the two sliders 44 to slide inside the slide rail 42, thereby bringing the two clamping blocks 47 closer to each other. The two clamping blocks 47 use their V-shaped surfaces to clamp the outer tube 6. After the outer tube 6 is clamped, the user tightens the limiting screw 46, causing the limiting screw 46 to rotate relative to the rotating disk 45. The lower anti-slip part of the limiting screw 46 abuts against the upper end of the fixed platform 41, thereby locking the external clamping mechanism 4 after adjustment.

[0025] like Figure 2 As shown, a V-shaped anti-slip rubber pad 48 is attached to the V-side of the clamping block 47.

[0026] In this embodiment, when the two clamping blocks 47 approach each other, both clamping blocks 47 use V-shaped anti-slip rubber pads 48 to clamp the surface of the outer tube 6. Since the V-shaped anti-slip rubber pads 48 have a good anti-slip effect, the clamping stability of the clamping blocks 47 on the outer tube 6 can be improved.

[0027] like Figure 6 and Figure 7 As shown, the sealing mechanism 5 includes a sliding ring 51, a moving ring 52, a sealing ring 53, an annular rubber sheet 54, a feed channel 55, and a fastening screw 56. The sliding ring 51 is slidably disposed on the surface of the inner tube 7. The moving ring 52 is fixedly connected to the surface of the sliding ring 51. Multiple sealing rings 53 with different inner diameters are fixedly connected to the surface of the moving ring 52. The outer and inner circular surfaces of the sealing ring 53 are both fixedly connected to an annular rubber sheet 54. The moving ring 52 has a feed channel 55 inside, which passes through the moving ring 52. The surface of the sliding ring 51 is threaded with a fastening screw 56.

[0028] In this embodiment, after the user clamps and positions the outer tube 6 and inner tube 7 using the outer clamping mechanism 4 and the inner clamping mechanism 3, the user moves the sliding ring 51 on the surface of the inner tube 7, thereby causing the moving ring 52 to move and the sealing ring 53 to move closer to the outer tube 6. The port of the outer tube 6 is inserted between two adjacent sealing rings 53. The sealing ring 53 uses the annular rubber sheet 54 to seal the port of the outer tube 6. At the same time, the sliding ring 51 uses the sealing ring provided on its inner circular surface to seal the space between the inner tube 7 and the sliding ring 51, thereby sealing the filling space between the outer tube 6 and the inner tube 7. Since there are multiple sealing rings 53, the sealing mechanism 5 can seal the outer tube 6 with different inner diameters. When it is necessary to inject polyurethane foam, the user opens the rubber plug of the feed port of the feed channel 55, thereby using the feed channel 55 to inject the material into the space between the outer tube 6 and the inner tube 7.

[0029] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. An antistatic polyurethane foam sealing device, comprising a base plate (1), a sliding groove (2), an inner clamping mechanism (3), an outer clamping mechanism (4), and a sealing mechanism (5), wherein the base plate (1) is slidably connected to two inner clamping mechanisms (3) through two sliding grooves (2) formed on its surface, the outer clamping mechanism (4) is installed on the surface of the base plate (1), and the sealing mechanism (5) is located at the end face of an outer tube (6), characterized in that: The internal clamping mechanism (3) includes a moving block (31), a fixed sleeve (32), a threaded rod (33), a cone (34), a top rod (35), a spring (36), a clamping rod (37), and a moving plate (39). The moving block (31) is slidably connected inside the slide groove (2). The moving plate (39) is fixedly connected to the upper end of the moving block (31). The surface of the moving plate (39) is threadedly connected to a threaded rod (33) that passes through it. One end of the threaded rod (33) is rotatably connected to a cone (34). A fixed sleeve (32) is fixedly connected to the surface of the movable plate (39). The fixed sleeve (32) is slidably connected to a plurality of push rods (35) through a plurality of slots opened on its surface. One end of the push rod (35) is fixedly connected to a clamping rod (37). The other end of the push rod (35) is in smooth contact with the cone (34). A spring (36) is wound around the surface of the push rod (35). One end of the spring (36) is fixedly connected to the handle end of the push rod (35). The other end of the spring (36) is fixedly connected to the fixed sleeve (32).

2. The antistatic polyurethane foam sealing device according to claim 1, characterized in that: The surface of the clamping rod (37) is covered with an anti-slip rubber pad (38).

3. The antistatic polyurethane foam sealing device according to claim 1, characterized in that: The external clamping mechanism (4) includes a fixed platform (41), a slide rail (42), a bidirectional threaded rod (43), a slider (44), a rotating disk (45), a limiting screw (46), and a clamping block (47). The fixed platform (41) is mounted on the surface of the base plate (1). The fixed platform (41) is slidably connected to two sliders (44) through the slide rail (42) on its surface. The bidirectional threaded rod (43) is rotatably connected inside the slide rail (42). The bidirectional threaded rod (43) passes through the slider (44) and is threadedly connected to the slider (44). The rotating disk (45) is fixedly connected to the shaft end of the bidirectional threaded rod (43). The limiting screw (46) is threadedly connected to the surface of the rotating disk (45). The clamping block (47) is fixedly connected to one end of the slider (44).

4. The antistatic polyurethane foam sealing device according to claim 3, characterized in that: The V-shaped anti-slip rubber pad (48) is attached to the V-side of the clamping block (47).

5. The antistatic polyurethane foam sealing device according to claim 1, characterized in that: The sealing mechanism (5) includes a sliding ring (51), a moving ring (52), a sealing ring (53), an annular rubber sheet (54), a feed channel (55), and a fastening screw (56). The sliding ring (51) is slidably disposed on the surface of the inner tube (7). The moving ring (52) is fixedly connected to the surface of the sliding ring (51). Multiple sealing rings (53) with different inner diameters are fixedly connected to the surface of the moving ring (52). The outer and inner surfaces of the sealing ring (53) are both fixedly connected to an annular rubber sheet (54). The feed channel (55) is opened inside the moving ring (52). The feed channel (55) passes through the moving ring (52). The surface of the sliding ring (51) is threaded with a fastening screw (56).

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