Electric fusion welding box with high-sealing mechanism
By introducing a transmission system consisting of a drive bevel gear, a synchronous bevel gear, and a two-way lead screw into the electrofusion welding box, combined with damping bearings and a sealing structure, the problems of inaccurate plastic tube positioning and reduced clamping force are solved, achieving stable and efficient welding and sealing, and adapting to the needs of different pipe diameters.
Patent Information
- Application Number
- CN202520036575.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-08
AI Technical Summary
Existing electrofusion welding boxes lack positioning and fixing devices, resulting in inaccurate positioning of plastic pipes, affecting welding quality. Furthermore, the elasticity of traditional jackets is easily weakened at high temperatures, leading to a decrease in clamping force and making them unsuitable for pipes of different sizes.
The transmission system consists of an active bevel gear, a synchronous bevel gear, and a double-acting screw. The double-acting screw is driven to rotate synchronously by a handwheel, which enables synchronous clamping of the arc-shaped clamping blocks. Combined with damping bearings and guide rods, the clamping force is kept stable and adaptable to different pipe diameters. At the same time, sealing rings and spring clamps are used to improve the sealing performance.
It achieves stable clamping and high-quality welding of plastic pipes, adapts to different pipe diameters, improves the versatility and operational efficiency of the equipment, prevents loosening of clamps and loss of sealing, and ensures the safety of the welding process.
Smart Images
Figure CN223644302U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrofusion welding equipment technology, specifically to an electrofusion welding box with a high sealing mechanism. Background Technology
[0002] Electrofusion welding is widely used in the field of plastic pipe connection. However, existing electrofusion welding boxes lack positioning and fixing devices, which can lead to inaccurate positioning of the plastic pipe during electrofusion welding, resulting in unstable welding quality and increased equipment failure rate. Traditionally, elastic sleeves are used to wrap the pipe fittings, and the elastic deformation of the sleeves is used to clamp the pipe fittings. However, during the electrofusion welding process, high temperatures may affect the elastic performance of the sleeves. The elasticity of the sleeves gradually weakens with the increase of usage time and clamping times, resulting in a decrease in clamping force. Moreover, this structure cannot adapt to pipe fittings of different sizes, resulting in poor adaptability.
[0003] To address these issues, we designed an electrofusion welding box with a highly sealing mechanism. Utility Model Content
[0004] The purpose of this invention is to provide an electrofusion welding box with a high sealing mechanism to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides an electrofusion welding box with a high sealing mechanism, including a box body. The box body is provided with a driving bevel gear and a synchronous bevel gear. A transmission component is provided between the driving bevel gear and the synchronous bevel gear. A bidirectional lead screw is fixedly connected to both the driving bevel gear and the synchronous bevel gear. One end of the bidirectional lead screw is rotatably connected to the inner side of the box body. A handwheel is connected to the end of the bidirectional lead screw away from the driving bevel gear. Nuts are symmetrically threaded on the bidirectional lead screws. An arc-shaped clamp is fixedly connected to the bottom of the nut. An electrofusion fitting is fixedly connected to the bottom of the box body. The electrofusion fitting is located between the two bidirectional lead screws.
[0006] Furthermore, the transmission assembly includes a connecting rod, with a driven bevel gear fixedly connected to both ends of the connecting rod. The driven bevel gear is meshed with the driving bevel gear and the synchronizing bevel gear, respectively.
[0007] Furthermore, the housing is equipped with a guide rod that passes through the arc-shaped clamping block, and both ends of the guide rod are fixedly connected to the inner side wall of the main baffle housing. The end of the bidirectional lead screw away from the active bevel gear is fixedly connected to a damping bearing that passes through the side wall of the housing.
[0008] Furthermore, a heating copper wire is embedded in the inner wall of the electrofusion fitting, and a bracket is fixedly connected to the bottom of the electrofusion fitting, the bracket being installed on the inner bottom wall of the box.
[0009] Furthermore, a sealing ring is fitted at the connection between the box cover and the box body.
[0010] Furthermore, a fixing block is fixedly connected to one side of the box cover, a spring clamp is fixedly connected to the side of the fixing block, and a locking block is fixedly connected to the side of the box body near the fixing block, the locking block engaging with the spring clamp.
[0011] Furthermore, an observation window is snapped onto the top of the enclosure.
[0012] Furthermore, the clamping surface on the inner side of the arc-shaped clamping block is made of rubber.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. The bidirectional lead screw achieves synchronous rotation through the active bevel gear, synchronous bevel gear, and transmission assembly, enabling two sets of arc-shaped clamping blocks to simultaneously clamp and position the plastic tube. The threaded engagement between the bidirectional lead screw and the nut provides a stable and durable clamping force, unaffected by the high temperature of electrofusion welding, and will not decrease in clamping force due to increased usage time and clamping cycles. This avoids problems such as loosening and displacement of pipe fittings caused by insufficient clamping force, thus improving the quality of electrofusion welding. The operating handwheel allows for flexible adjustment of the distance between the two arc-shaped clamping blocks, enabling the electrofusion welding box to adapt to the clamping requirements of plastic tubes of different diameters, improving the versatility and practicality of the equipment.
[0015] 2. By setting up connecting rods and driven bevel gears, operators only need to turn the handwheel to achieve synchronous clamping of both ends of the plastic tube, reducing the amount of manual operation and improving work efficiency. The damping bearing is fixedly connected to the bearing seat of the box side wall with an interference fit. Its damping characteristics can reduce the excessive rotation or free rotation of the bidirectional screw under vibration or accidental contact, prevent the arc-shaped clamp from loosening, and avoid displacement of the plastic tube during electrofusion welding. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the internal structure of the box body of this utility model;
[0018] Figure 3 This is a cross-sectional view of the electrofusion fitting of this utility model;
[0019] Figure 4 This utility model Figure 1 Enlarged diagram of point A in the middle.
[0020] In the diagram: 1. Housing; 2. Observation window; 3. Handwheel; 4. Sealing ring; 5. Two-way lead screw; 6. Nut; 7. Arc-shaped clamp; 8. Guide rod; 9. Synchronous bevel gear; 10. Driven bevel gear; 11. Connecting rod; 12. Electrofusion fitting; 13. Bracket; 14. Damping bearing; 15. Fixing block; 16. Clamping block; 17. Spring clamp; 18. Heating copper wire; 19. Driving bevel gear. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-4 This utility model provides a technical solution: an electrofusion welding box with a high sealing mechanism, including a box body 1. Inside the box body 1, there is a driving bevel gear 19 and a synchronous bevel gear 9. A transmission component is provided between the driving bevel gear 19 and the synchronous bevel gear 9. Both the driving bevel gear 19 and the synchronous bevel gear 9 are fixedly connected to a bidirectional lead screw 5. One end of the bidirectional lead screw 5 is rotatably connected to the inner side of the box body 1 through a bearing. The end of the bidirectional lead screw 5 away from the driving bevel gear 19 is connected to a handwheel 3. Nuts 6 are symmetrically threaded on the bidirectional lead screw 5. An arc-shaped clamping block 7 is fixedly connected to the bottom of the nut 6. An electrofusion fitting 12 is fixedly connected to the bottom of the box body 1. An electrofusion machine is connected to the outside of the electrofusion fitting 12. The electrofusion fitting 12 is located between the two bidirectional lead screws 5.
[0023] In practice, the external operator rotates the handwheel 3 to drive the bidirectional lead screw 5 to rotate. Since the surface texture of the bidirectional lead screw 5 is symmetrical, the rotation of the bidirectional lead screw 5 causes the two nuts 6 to move closer to each other, which in turn causes the two arc-shaped clamps 7 to move closer to each other. This makes the plastic tube subject to relatively uniform centering pressure in the horizontal direction, thus tightly fitting the part to be electrofusion welded. When the active bevel gear 19 rotates, the transmission component drives the synchronous bevel gear 9 to rotate synchronously. The electrofusion fitting 12 itself heats and melts the plastic material on the surface of the plastic tube it contacts. After the plastic cools and solidifies, the handwheel 3 is rotated in the opposite direction, causing the nuts 6 to move away from each other, and the arc-shaped clamps 7 to move away from each other, thus releasing the plastic tube and completing the electrofusion welding of the plastic tube.
[0024] See Figure 2As shown, the transmission assembly includes a connecting rod 11, with driven bevel gears 10 fixedly connected to both ends of the connecting rod 11. The driven bevel gears 10 mesh with the driving bevel gear 19 and the synchronous bevel gear 9, respectively. When the driving bevel gear 19 rotates, it transmits power to the synchronous bevel gear 9 by meshing with the driven bevel gears 10 at both ends of the connecting rod 11, so that the bidirectional lead screw 5 connected to the driving bevel gear 19 and the synchronous bevel gear 9 can rotate synchronously, clamping both ends of the plastic tube symmetrically, so that the plastic tube is subjected to uniform force. Moreover, the operator only needs to turn the handwheel 3 to achieve synchronous clamping of both ends of the plastic tube, reducing the amount of manual operation and improving work efficiency. The clamping surface on the inner side of the arc-shaped clamping block 7 is made of rubber. When clamping, the rubber will deform moderately, buffering part of the clamping force, so that the pressure on the plastic tube is not too large.
[0025] See Figure 2 Inside the housing 1, there is a guide rod 8 that passes through the arc-shaped clamping block 7. Both ends of the guide rod 8 are fixedly connected to the inner side wall of the main baffle housing 1. The guide rod 8 provides precise guidance for the movement of the arc-shaped clamping block 7. Driven by the bidirectional lead screw 5, the arc-shaped clamping block 7 can only move along the axial direction of the guide rod 8, avoiding rotation or offset during movement. When the arc-shaped clamping block 7 clamps the plastic tube, the guide rod 8 also shares some of the pressure from the plastic tube, preventing the bidirectional lead screw 5 from bending and deforming due to excessive force on one side, thereby extending the service life of the bidirectional lead screw 5. A damping bearing 14 is fixedly connected to the end of the bidirectional lead screw 5 away from the driving bevel gear 19. The damping bearing 14 is interference-fitted with the bearing seat fixedly connected to the side wall of the housing 1. The damping bearing 14 passes through the side wall of the housing 1. Its damping characteristics can reduce the excessive rotation or free rotation of the bidirectional lead screw 5 under vibration or accidental contact, preventing the arc-shaped clamping block 7 from loosening and avoiding displacement of the plastic tube during electrofusion welding.
[0026] See Figure 2 and Figure 3 The inner wall of the electrofusion fitting 12 is embedded with a heating copper wire 18. A bracket 13 is fixedly connected to the bottom of the electrofusion fitting 12. An elastic electrode is installed on the bracket 13. When the electrofusion fitting 12 is installed on the bracket 13, the elastic electrode can make close contact with the electrode of the heating copper wire 18. It maintains a good electrical connection by relying on the elastic force, thereby realizing the power supply. The bracket 13 is installed on the inner bottom wall of the box 1. The elastic electrode of the bracket 13 is electrically connected to the output end of the electrofusion machine through a wire. When the electrofusion machine powers the heating copper wire 18, the heating copper wire 18 generates heat. The heat is transferred to the surface of the plastic tube in contact with it, causing it to melt. After cooling, it forms a whole, thereby completing the electrofusion welding of the plastic tube.
[0027] See Figure 1A sealing ring 4 is fitted at the connection between the lid and body of the box 1 to prevent external dust and impurities from entering the interior of the box 1, avoid defects such as porosity and slag inclusion at the electrofusion welding point, and prevent sparks and high-temperature molten materials generated during the electrofusion welding process from splashing out of the box 1, thereby improving operational safety. An observation window 2 is snapped into the top of the box 1 through a slot. A sealing gasket is set at the snapping edge between the observation window 2 and the box 1. Its shape matches the snapping contour of the observation window 2 and the box 1. When the observation window 2 is snapped into the box 1, the sealing gasket is squeezed and deformed, filling the tiny gap between the observation window 2 and the box 1, thereby achieving a sealing effect.
[0028] See Figure 1 and Figure 4 A fixing block 15 is fixedly connected to one side of the lid of the box body 1. A spring clamp 17 is fixedly connected to the side of the fixing block 15. The spring clamp 17 is composed of a spring and a clamp ring. A locking block 16 is fixedly connected to the side of the box body 1 near the fixing block 15. The locking block 16 engages with the spring clamp 17 to fix the lid. When the lid is closed, the spring clamp 17 can be locked onto the locking block 16, and the lid is fixed to the box body by the elastic force of the spring, preventing the lid from being accidentally opened during the electrofusion welding process and ensuring the sealing and stability of the inside of the box body 1.
[0029] Working principle:
[0030] Open the box cover and place the plastic tube to be electrofused into the box 1, aligning the part of the plastic tube to be electrofused with the electrofusion fitting 12. The operator turns the handwheel 3, which drives the connected double-acting screw 5 to rotate. Since the driving bevel gear 19 and the synchronous bevel gear 9 rotate synchronously through the connecting rod 11 and the driven bevel gear 10, the two double-acting screws 5 rotate synchronously. The rotation of the double-acting screws 5 drives the nuts 6 to move towards each other. The arc-shaped clamps 7 on the two double-acting screws 5 approach from both sides of the plastic tube at the same time, so that the plastic tube is subjected to a relatively uniform centering pressure in the horizontal direction, thus tightly fitting the part to be electrofused. When clamped, the rubber will deform moderately, buffering part of the clamping force, so that the pressure on the plastic tube is not too great.
[0031] Close the lid, and fit the sealing ring 4 between the lid and the body. Attach the spring clamp 17 to the clamp block 16 to secure the lid with spring force, preventing external dust and impurities from entering and internal sparks and molten material from splashing out. Turn on the electrofusion machine, which transmits current through wires to the elastic electrodes on the support 13, thereby energizing the heating copper wire 18 on the inner wall of the electrofusion fitting 12. The heat generated by the heating copper wire 18 is transferred to the surface of the plastic tube in contact with the electrofusion fitting 12, causing the plastic to melt. During the melting process, due to the clamping action of the arc-shaped clamp 7, the plastic tube and the electrofusion fitting 12 maintain close contact, ensuring uniform heat transfer and full melting and fusion of the plastic. After the plastic cools and solidifies, it forms a whole, completing the electrofusion welding of the plastic tube.
[0032] The operator rotates the handwheel 3 in the opposite direction, causing the two-way screw 5 to reverse, making the nuts 6 move in opposite directions, which in turn causes the arc-shaped clamps 7 to move away from each other, loosening the electrofusion welded plastic tube, opening the box cover, and taking out the plastic tube.
Claims
1. An electrofusion welding box with a high sealing mechanism, comprising a box body (1), wherein the box body (1) is provided with a driving bevel gear (19) and a synchronizing bevel gear (9) inside, characterized in that, A transmission assembly is provided between the active bevel gear (19) and the synchronous bevel gear (9). Both the active bevel gear (19) and the synchronous bevel gear (9) are fixedly connected to a double-acting screw (5). One end of the double-acting screw (5) is rotatably connected to the inside of the housing (1). A handwheel (3) is connected to the end of the double-acting screw (5) away from the active bevel gear (19). Nuts (6) are symmetrically threaded onto the double-acting screw (5). An arc-shaped clamp (7) is fixedly connected to the bottom of the nut (6). An electrofusion fitting (12) is fixedly connected to the bottom of the housing (1). The electrofusion fitting (12) is located between the two double-acting screws (5).
2. The electrofusion welding box with a high sealing mechanism as described in claim 1, characterized in that: The transmission assembly includes a connecting rod (11), and both ends of the connecting rod (11) are fixedly connected to driven bevel gears (10). The driven bevel gears (10) are meshed with the driving bevel gear (19) and the synchronous bevel gear (9), respectively.
3. The electrofusion welding box with a high sealing mechanism as described in claim 1, characterized in that: The housing (1) is provided with a guide rod (8) inside. The guide rod (8) passes through the arc-shaped clamp (7), and both ends of the guide rod (8) are fixedly connected to the inner side wall of the main baffle housing (1). The end of the bidirectional screw (5) away from the active bevel gear (19) is fixedly connected to a damping bearing (14), and the damping bearing (14) passes through the side wall of the housing (1).
4. The electrofusion welding box with a high sealing mechanism as described in claim 1, characterized in that: The inner wall of the electrofusion fitting (12) is embedded with a heating copper wire (18), and a bracket (13) is fixedly connected to the bottom of the electrofusion fitting (12). The bracket (13) is installed on the inner bottom wall of the box (1).
5. The electrofusion welding box with a high sealing mechanism as described in claim 4, characterized in that: The box body (1) has a sealing ring (4) fitted at the connection between the box cover and the box body.
6. The electrofusion welding box with a high sealing mechanism as described in claim 5, characterized in that: A fixing block (15) is fixedly connected to one side of the lid of the box body (1), and a spring clamp (17) is fixedly connected to the side of the fixing block (15). A locking block (16) is fixedly connected to the side of the box body (1) near the fixing block (15), and the locking block (16) is engaged with the spring clamp (17).
7. The electrofusion welding box with a high sealing mechanism as described in claim 6, characterized in that: The top of the box (1) is fitted with an observation window (2).
8. The electrofusion welding box with a high sealing mechanism as described in claim 1, characterized in that: The clamping surface on the inner side of the arc-shaped clamp (7) is made of rubber.