A welding-free connecting device and method for a reducing pipe

Abstract

The application discloses a kind of different-diameter pipeline welding-free connecting device and connecting method, it is related to pipeline connection technical field.The different-diameter pipeline welding-free connecting device, including large-diameter pipeline, small-diameter pipeline and base, the inner wall of small-diameter pipeline is inserted with large-diameter pipeline, the inner wall of large-diameter pipeline is equipped with the clamping groove one, the inner wall of large-diameter pipeline is provided with adjusting pad structure, the outer wall of adjusting pad structure is fixedly connected with clamping lug one, the outer wall of clamping lug one is clamped with the inner wall of clamping groove one, the outer wall of adjusting pad structure is evenly equipped with clamping groove two, the size of clamping lug one and clamping groove two is compatible.By the cooperation of adjusting pad, clamping lug and other structures, the pipeline of different radius can be freely connected, the connection of pipeline is more convenient, the application adopts multiple fixing, and the connection is more stable, the application realizes the fixation of two different radius pipelines, and avoids the pollution of welding.

Description

Technical Field

[0001] This invention relates to the field of pipe connection technology, and in particular to a weld-free connection device and method for reducing pipe diameter. Background Technology

[0002] Pipeline connections are a common method of transportation in daily life and production. However, due to different transportation needs, the pipe diameters used for transportation are not entirely consistent. When connecting pipes of different diameters, the existing method is mainly to use reducing fittings for welding and fixing. However, welding will generate a large amount of toxic and harmful welding fumes. The particles are small and highly viscous, which not only seriously pollute the environment but also seriously endanger the health of welding technicians. At the same time, the weld beads on the inner wall of the joint are rough and cannot be effectively ground. This leads to accumulation at the joint when transporting water containing impurities, which is not easy to clean and will also affect the transportation process. Summary of the Invention

[0003] The purpose of this invention is to provide a welding-free connection device and method for reducing pipe diameters, which solves the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a weld-free connection device for reducing pipe diameters, comprising a large-diameter pipe, a small-diameter pipe, and a base, characterized in that: the small-diameter pipe is inserted into the inner wall of the large-diameter pipe; the inner wall of the large-diameter pipe has a snap-fit ​​groove; the inner wall of the large-diameter pipe is provided with an adjusting pad structure; the outer wall of the adjusting pad structure is fixedly connected with a snap-fit ​​protrusion; the outer wall of the snap-fit ​​protrusion engages with the inner wall of the snap-fit ​​groove; the inner wall of the adjusting pad structure is uniformly provided with snap-fit ​​grooves; the dimensions of the snap-fit ​​protrusion and the snap-fit ​​groove are adapted to each other; adjacent adjusting pad structures are connected by the engagement of the snap-fit ​​protrusion and the snap-fit ​​groove; a sealing rubber gasket is provided on the outer wall of the adjusting pad structure near the pipe opening of the large-diameter pipe; the sealing rubber gasket is fitted onto the outer wall of the small-diameter pipe.

[0005] The outer walls of the large-diameter and small-diameter pipes are provided with outer fixing rings, and the inner walls of the outer fixing rings are provided with inner fixing rings. The outer walls of the inner fixing rings are fixedly connected with snap-fit ​​protrusions. The outer walls of the snap-fit ​​protrusions are snapped into the inner walls of the inner fixing rings. Both the outer and inner fixing rings are open structures. Connecting blocks are symmetrically provided at the opening of the outer fixing rings. The connecting blocks are locked and fixed together by limiting screws and limiting nuts.

[0006] Preferably, the adjusting pad structure of the present invention includes adjusting pad one and adjusting pad two, wherein the inner wall of adjusting pad one is movably connected with a second ratchet, and the outer wall of adjusting pad two is fixedly connected with a first ratchet.

[0007] Preferably, the first adjusting pad of the present invention is semi-circular, one end of the first adjusting pad is fixedly connected to one end of the second adjusting pad, and the other end of the first adjusting pad is movably connected to the inner wall of the second adjusting pad.

[0008] Preferably, the snap-fit ​​grooves of the present invention are evenly arrayed on the inner wall of the large-diameter pipe with the center of the pipe as the center, and the snap-fit ​​protrusions are evenly arrayed on the outer wall of the adjusting pad structure with the center of the adjusting pad structure as the center.

[0009] Preferably, the inner wall of the outer fixing ring of the present invention is fitted with the outer wall of the large-diameter pipe, and the outer wall of the small-diameter pipe is in contact with the inner wall of the inner fixing ring.

[0010] Preferably, the present invention provides a support base below the contact of the reducing pipes, and a buffer device is provided between the end face of the base and the outer fixing ring. The buffer device includes a buffer box, a buffer rubber pad is movably connected to the inner wall of the buffer box, an upper buffer plate and a lower buffer plate are slidably connected to the inner wall of the buffer box, a moving groove is provided on both sides of the inner wall of the buffer box, the outer walls of the upper buffer plate and the lower buffer plate are slidably connected to the inner wall of the moving groove, a third spring is fixedly connected between the outer walls of the two upper buffer plates and between the outer walls of the upper buffer plate and the lower buffer plate, and a support rod is movably connected to the bottom of the inner wall of the buffer box, the end of the support rod away from the bottom of the inner wall of the buffer box is slidably connected to the inner wall of the lower buffer plate.

[0011] Preferably, the bottom outer wall of the lower buffer plate of the present invention is provided with a second movable groove, the inner wall of the second movable groove is slidably connected with a movable block, and the outer wall of the movable block is movably connected to one end of the support rod away from the bottom of the inner wall of the buffer box.

[0012] The present invention also provides a connection method based on the above-described connection device, comprising the following steps:

[0013] S01. Based on the difference in diameter between the large-diameter pipe and the small-diameter pipe in the reducing pipe system, select an adjusting pad structure that matches the difference.

[0014] S02. Adjust the radius of the circle formed by adjusting pad one and adjusting pad two to make it larger than the outer diameter of the small diameter pipe. Fit the adjusted adjusting pad structure onto the end of the small diameter pipe. Then adjust the radius of the circle formed by adjusting pad one and adjusting pad two again so that the inner circle of the adjusting pad structure is flush with the outer diameter of the small diameter pipe.

[0015] S03. According to the position distribution of the snap-fit ​​protrusion 1 and snap-fit ​​groove 1 on the adjusting pad structure, insert the small-diameter pipe and the adjusting pad structure as a whole into the pipe opening of the large-diameter pipe to complete the connection between the large-diameter pipe and the small-diameter pipe.

[0016] S04. Slide the inner and outer fixing rings onto the connection between the large-diameter and small-diameter pipes in sequence, and use the limit screw and limit nut to lock and fix them, thus completing the connection of the different diameter pipes.

[0017] Preferably, in step S02, the process of adjusting the inner diameter of the adjusting pad structure includes: pressing the second adjusting pad inward to disengage the first and second ratchet teeth, then enlarging the size of the adjusting pad structure to be larger than the outer diameter of the small-diameter pipe, and after the adjusting pad structure is fitted onto the small-diameter pipe, pressing the second adjusting pad inward directly to reduce the inner diameter of the adjusting pad structure and making it fit tightly against the outer wall of the small-diameter pipe.

[0018] Compared with related technologies, the weld-free connection device and method for reducing pipe diameter provided by the present invention have the following advantages:

[0019] 1. This invention, through the combined use of adjusting pads, snap-fit ​​protrusions, and other structures, allows pipes of different radii to be freely connected, making pipe connection more convenient.

[0020] 2. This invention further secures the pipe by using inner and outer fixing rings, providing multiple layers of fixation for a more stable connection.

[0021] 3. The adjusting pad structure of the present invention can adjust the size of the circular structure formed by pressing the adjusting pad two, which facilitates the assembly and docking between structures. Compared with the fixed structure type, it can simplify the difficulty of installing and connecting the pad and improve the connection efficiency.

[0022] 4. The present invention uses a buffer device to absorb and buffer the vibration generated when the water pipe is working, so as to avoid the problem of loosening between the pipe joint and the external joint due to long-term vibration.

[0023] 5. This invention achieves the fixation of two pipes with different radii by using the combination of adjusting pad structure, fixing ring and other structures, while avoiding welding contamination. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a partial structural schematic diagram of the present invention;

[0026] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0027] Figure 4 This is a schematic diagram of the structure of the small-diameter pipeline of the present invention;

[0028] Figure 5 This is a schematic diagram of the adjusting pad structure of the present invention;

[0029] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B;

[0030] Figure 7 This is a schematic diagram of the fixing ring structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the buffer device structure of the present invention. Figure 1 ;

[0032] Figure 9 This is a schematic diagram of the buffer device structure of the present invention. Figure 2 .

[0033] In the diagram: 1. Large-diameter pipe; 2. Small-diameter pipe; 3. Snap-fit ​​groove one; 4. Adjusting pad structure; 401. Adjusting pad one; 402. Adjusting pad two; 403. First ratchet; 404. Second ratchet; 5. Snap-fit ​​protrusion one; 6. Snap-fit ​​groove two; 7. Sealing rubber gasket; 8. Outer fixing ring; 9. Inner fixing ring; 10. Snap-fit ​​protrusion two; 11. Connecting block; 12. Limiting screw; 13. Limiting nut; 14. Base; 15. Buffer device; 151. Buffer box; 152. Buffer rubber pad; 153. Upper buffer plate; 154. Lower buffer plate; 155. Moving groove one; 156. Third spring; 157. Support rod. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] Example 1:

[0036] Please see Figures 1-9This invention provides a technical solution: a weld-free connection device for reducing pipe diameters, comprising a large-diameter pipe 1, a small-diameter pipe 2, and a base 14, characterized in that: the small-diameter pipe 2 is inserted into the inner wall of the large-diameter pipe 1; the inner wall of the large-diameter pipe 1 has a snap-fit ​​groove 3; the inner wall of the large-diameter pipe 1 is provided with an adjusting pad structure 4; the outer wall of the adjusting pad structure 4 is fixedly connected with a snap-fit ​​protrusion 5; the outer wall of the snap-fit ​​protrusion 5 snaps with the inner wall of the snap-fit ​​groove 3; the inner wall of the adjusting pad structure 4 is uniformly provided with snap-fit ​​grooves 6; the dimensions of the snap-fit ​​protrusion 5 and the snap-fit ​​groove 6 are adapted to each other; adjacent adjusting pad structures are connected by the snap-fit ​​protrusion 5 and the snap-fit ​​groove 6; a sealing rubber gasket 7 is provided on the outer wall of the adjusting pad structure 4 near the pipe opening of the large-diameter pipe 1; the sealing rubber gasket 7 is sleeved on the outer wall of the small-diameter pipe 2.

[0037] The adjusting pad structure 4 includes adjusting pad one 401 and adjusting pad two 402. A second ratchet 404 is movably connected to the inner wall of adjusting pad one 401, and a first ratchet 403 is fixedly connected to the outer wall of adjusting pad two 402. Adjusting pad one 401 is semi-circular, with one end fixedly connected to one end of adjusting pad two 402, and the other end movably connected to the inner wall of adjusting pad two 402.

[0038] In this embodiment, the adjusting pad structure 4 is fixed to the outer wall of the small-diameter pipe 2. According to the usage requirements, the adjusting pad structure 4 is further stacked on the outer wall of the small-diameter pipe 2. The size of the adjusting pad structure 4 in this embodiment can be adjusted. By pressing the adjusting pad 2 402 into the adjusting pad 1 401, it is convenient to adjust the radius of the circle formed by the adjusting pad 1 401 and the adjusting pad 2 402. The use of the first ratchet 403 and the second ratchet 404 is similar to the use of a cable tie. The second ratchet 404 can only move to one side. When the adjusting pad 2 402 moves into the adjusting pad 1 401, the first ratchet 403 drives the second ratchet 404 to tilt inward. When the first ratchet 403 moves outward, the second ratchet 404 limits it, so that the adjusting pad 2 402 cannot move outward.

[0039] To further improve the reliability of the adjusting pad structure of the present invention, the present invention can be... Figure 6 The first ratchet 403 shown is configured with an inclination angle consistent with that of the second ratchet 404. This way, when the adjusting pad 402 is pressed to reduce the inner diameter, the second ratchet 404 will not obstruct the first ratchet 403. When the first ratchet 403 tends to move outward to expand the inner diameter, the second ratchet 404 and the first ratchet 403 form a barbed structure, which can prevent the expansion of the inner diameter. In this way, after the adjusting pad structure 4 is fitted onto the small diameter pipe 2, there will be no loosening, which can improve the reliability of the connected structure.

[0040] The adjusting pad structure 4 is snapped onto the inner wall of the large-diameter pipe 1. The adjusting pad structure 4 is fixed by snapping it onto the outer wall of the snap-fit ​​groove 3, thereby fixing the small-diameter pipe 2 inside the large-diameter pipe 1. When the radius of the large-diameter pipe 1 is large, the adjusting pad structure 4 can be placed on the outer wall of the adjusting pad structure 4. It is fixed by snapping the snap-fit ​​protrusion 5 onto the snap-fit ​​groove 6, thus adapting to small-diameter pipes 2 with different radii. The connection of the pipe is sealed by the sealing rubber gasket 7.

[0041] Example 2:

[0042] Please see Figures 1-7 As shown, based on Embodiment 1, the present invention provides a technical solution: an outer fixing ring 8 is provided on the outer wall of the large-diameter pipe 1 and the small-diameter pipe 2, and an inner fixing ring 9 is provided on the inner wall of the outer fixing ring 8. A snap-fit ​​protrusion 2 10 is fixedly connected to the outer wall of the inner fixing ring 9. The outer wall of the snap-fit ​​protrusion 2 10 snaps into the inner wall of the inner fixing ring 9. Both the outer fixing ring 8 and the inner fixing ring 9 adopt an open structure. Connecting blocks 11 are symmetrically provided at the opening of the outer fixing ring 8. The connecting blocks 11 are locked and fixed together by a limiting screw 12 and a limiting nut 13.

[0043] In this embodiment, the inner fixing ring 9 is snapped onto the inner wall of the outer fixing ring 8, the outer fixing ring 8 contacts the outer wall of the large-diameter pipe 1, and the inner fixing ring 9 contacts the outer wall of the small-diameter pipe 2. The limiting nut 13 is tightened to further fix the pipe with the inner fixing ring 9 and the outer fixing ring 8. The open structure design allows the locking inner diameter of the inner fixing ring 9 and the outer fixing ring 8 to be adjustable to accommodate certain size deviations and effectively fix the connected pipes of different diameters.

[0044] Example 3:

[0045] Please see Figures 8-9As shown, based on Embodiment 1 and Embodiment 2, the present invention provides a technical solution: a base 14 for support is provided below the contact of the reducing pipes; a buffer device 15 is provided between the end face of the base 14 and the outer fixing ring 8; the buffer device 15 includes a buffer box 151; a buffer rubber pad 152 is movably connected to the inner wall of the buffer box 151; an upper buffer plate 153 and a lower buffer plate 154 are slidably connected to the inner wall of the buffer box 151; and a moving groove 155 is provided on both sides of the inner wall of the buffer box 151; the outer walls of the upper buffer plate 153 and the lower buffer plate 154 are connected to the moving groove 155. The inner wall of the moving groove 155 is slidably connected. A third spring 156 is fixedly connected between the outer walls of the two upper buffer plates 153 and between the outer walls of the upper buffer plate 153 and the lower buffer plate 154. A support rod 157 is movably connected to the bottom of the inner wall of the buffer box 151. One end of the support rod 157 away from the bottom of the inner wall of the buffer box 151 is slidably connected to the inner wall of the lower buffer plate 154. A second moving groove is formed on the bottom outer wall of the lower buffer plate 154. A moving block is slidably connected to the inner wall of the second moving groove. The outer wall of the moving block is movably connected to the end of the support rod 157 away from the bottom of the inner wall of the buffer box 151.

[0046] In this embodiment, when the large-diameter pipe 1 and the small-diameter pipe 2 vibrate, the vibration is transmitted to the buffer rubber pad 152. The buffer rubber pad 152 moves downward and transmits the vibration to the upper buffer plate 153. The upper buffer plate 153 moves downward and compresses the third spring 156 to absorb the vibration. The vibration on the upper buffer plate 153 is transmitted to the lower buffer plate 154. The lower buffer plate 154 compresses the support rod 157. The support rod 157 moves in the second moving groove to further buffer the vibration.

[0047] Example 4:

[0048] The present invention also provides a method for welding-free connection of reducing pipes, comprising the following steps:

[0049] S01. Based on the difference in diameter between the large-diameter pipe and the small-diameter pipe in the reducing pipe system, select an adjusting pad structure that matches the difference.

[0050] S02. Adjust the radius of the circle formed by adjusting pad one and adjusting pad two to make it larger than the outer diameter of the small diameter pipe. Fit the adjusted adjusting pad structure onto the end of the small diameter pipe. Then adjust the radius of the circle formed by adjusting pad one and adjusting pad two again so that the inner circle of the adjusting pad structure is flush with the outer diameter of the small diameter pipe.

[0051] S03. According to the position distribution of the snap-fit ​​protrusion 1 and snap-fit ​​groove 1 on the adjusting pad structure, insert the small-diameter pipe and the adjusting pad structure as a whole into the pipe opening of the large-diameter pipe to complete the connection between the large-diameter pipe and the small-diameter pipe.

[0052] S04. Slide the inner and outer fixing rings onto the connection between the large-diameter and small-diameter pipes in sequence, and use the limit screw and limit nut to lock and fix them, thus completing the connection of the different diameter pipes.

[0053] In step S02, the process of adjusting the inner diameter of the adjusting pad structure includes: pressing the second adjusting pad inward to disengage the first and second ratchet teeth, then enlarging the size of the adjusting pad structure to be larger than the outer diameter of the small-diameter pipe, and after the adjusting pad structure is fitted onto the small-diameter pipe, pressing the second adjusting pad inward directly to reduce the inner diameter of the adjusting pad structure and making it fit tightly against the outer wall of the small-diameter pipe.

[0054] The connection method of this invention facilitates the rapid connection between two pipes of different diameters. At the same time, the inner diameter of the adjusting pad structure can be adjusted before and after the connection, thereby achieving rapid connection and fixation, improving connection efficiency, and avoiding pollution caused by welding and the health impact on welding personnel.

Claims

1. A weld-free connection device for reducing pipe diameters, comprising a large-diameter pipe (1), a small-diameter pipe (2), and a base (14), characterized in that: The small-diameter pipe (2) is inserted into the inner wall of the large-diameter pipe (1). The inner wall of the large-diameter pipe (1) is provided with a snap-fit ​​groove (3). The inner wall of the large-diameter pipe (1) is provided with an adjusting pad structure (4). The outer wall of the adjusting pad structure (4) is fixedly connected with a snap-fit ​​protrusion (5). The outer wall of the snap-fit ​​protrusion (5) is snapped into the inner wall of the snap-fit ​​groove (3). The inner wall of the adjusting pad structure (4) is uniformly provided with a snap-fit ​​groove (6). The size of the snap-fit ​​protrusion (5) and the snap-fit ​​groove (6) are matched. Adjacent adjusting pad structures are connected by the snap-fit ​​protrusion (5) and the snap-fit ​​groove (6). A sealing rubber pad (7) is provided on the outer wall of the adjusting pad structure (4) near the pipe opening of the large-diameter pipe (1). The sealing rubber pad (7) is sleeved on the outer wall of the small-diameter pipe (2). The outer walls of the large-diameter pipe (1) and the small-diameter pipe (2) are provided with an outer fixing ring (8), and the inner wall of the outer fixing ring (8) is provided with an inner fixing ring (9). The outer wall of the inner fixing ring (9) is fixedly connected with a snap-fit ​​protrusion (10). The outer wall of the snap-fit ​​protrusion (10) is snapped with the inner wall of the outer fixing ring (8). Both the outer fixing ring (8) and the inner fixing ring (9) adopt an open structure. Connecting blocks (11) are symmetrically provided at the opening of the outer fixing ring (8). The connecting blocks (11) are locked and fixed together by a limiting screw (12) and a limiting nut (13). The adjusting pad structure (4) includes adjusting pad one (401) and adjusting pad two (402). The inner wall of adjusting pad one (401) is movably connected with a second ratchet (404), and the outer wall of adjusting pad two (402) is fixedly connected with a first ratchet (403). The first adjusting pad (401) is semi-circular. One end of the first adjusting pad (401) is fixedly connected to one end of the second adjusting pad (402), and the other end of the first adjusting pad (401) is movably connected to the inner wall of the second adjusting pad (402).

2. The weld-free connection device for reducing pipe diameters according to claim 1, characterized in that: The snap-fit ​​groove (3) is evenly distributed in an array on the inner wall of the large-diameter pipe (1) with the center of the pipe (1) as the center, and the snap-fit ​​protrusion (5) is evenly distributed in an array on the outer wall of the adjusting pad structure (4) with the center of the adjusting pad structure (4) as the center.

3. The weld-free connection device for reducing pipes according to claim 1, characterized in that: The inner wall of the outer fixing ring (8) is in contact with the outer wall of the large-diameter pipe (1), and the outer wall of the small-diameter pipe (2) is in contact with the inner wall of the inner fixing ring (9).

4. The weld-free connection device for reducing pipes according to claim 1, characterized in that: A base (14) for support is provided below the joint of the reducing pipes. A buffer device (15) is provided between the end face of the base (14) and the outer fixing ring (8). The buffer device (15) includes a buffer box (151). A buffer rubber pad (152) is movably connected to the inner wall of the buffer box (151). An upper buffer plate (153) and a lower buffer plate (154) are slidably connected to the inner wall of the buffer box (151). A moving groove (155) is provided on both sides of the inner wall of the buffer box (151). The outer walls of the upper buffer plate (153) and the lower buffer plate (154) are slidably connected to the inner wall of the moving groove (155). A third spring (156) is fixedly connected between the outer walls of the two upper buffer plates (153) and between the outer walls of the upper buffer plate (153) and the lower buffer plate (154). A support rod (157) is movably connected to the bottom of the inner wall of the buffer box (151). The end of the support rod (157) away from the bottom of the inner wall of the buffer box (151) is slidably connected to the inner wall of the lower buffer plate (154).

5. The weld-free connection device for reducing pipes according to claim 4, characterized in that: The bottom outer wall of the lower buffer plate (154) is provided with a movable groove two, and the inner wall of the movable groove two is slidably connected with a movable block. The outer wall of the movable block is movably connected to one end of the support rod (157) away from the bottom of the inner wall of the buffer box (151).

6. A connection method for a weld-free connection device for reducing pipes according to any one of claims 1-5, characterized in that, Including the following steps: S01. Based on the difference in diameter between the large-diameter pipe and the small-diameter pipe in the reducing pipe system, select an adjusting pad structure that matches the difference. S02. Adjust the radius of the circle formed by adjusting pad one and adjusting pad two to make it larger than the outer diameter of the small diameter pipe. Fit the adjusted adjusting pad structure onto the end of the small diameter pipe. Then adjust the radius of the circle formed by adjusting pad one and adjusting pad two again to make the inner ring of the adjusting pad structure fit tightly against the outer wall of the small diameter pipe. S03. According to the position distribution of the snap-fit ​​protrusion 1 and snap-fit ​​groove 1 on the adjusting pad structure, insert the small-diameter pipe and the adjusting pad structure as a whole into the pipe opening of the large-diameter pipe to complete the connection between the large-diameter pipe and the small-diameter pipe. S04. Slide the inner and outer fixing rings onto the connection between the large-diameter and small-diameter pipes in sequence, and use the limit screw and limit nut to lock and fix them, thus completing the connection of the different diameter pipes.

7. The method for weld-free connection of reducing pipes according to claim 6, characterized in that, In step S02, the process of adjusting the inner diameter of the adjusting pad structure includes: pressing the second adjusting pad inward to disengage the first and second ratchet teeth, then enlarging the size of the adjusting pad structure to be larger than the outer diameter of the small-diameter pipe, and after the adjusting pad structure is fitted onto the small-diameter pipe, pressing the second adjusting pad inward directly to reduce the inner diameter of the adjusting pad structure and making it fit tightly against the outer wall of the small-diameter pipe.

Images