A pipe connection device

Abstract

A pipeline connection device belongs to the field of pipeline connection devices, including an outer tube, two inner tubes are rotatably arranged inside the outer tube, a row of several slip rings are slidably arranged inside the inner tubes, adjacent slip rings are connected by elastic rubber tubes, a fixed ring fixed on the outer tube is arranged between the two inner tubes, the fixed rings are also connected to the adjacent slip rings on both sides by elastic rubber tubes, all the elastic rubber tubes, slip rings and fixed rings constitute a fixed tube, and the inner walls of the inner tubes are respectively provided with transverse strip grooves. The present invention has a simple structure and an ingenious design, can be applied to the connection of pipelines of various sizes, has high applicability, and is provided with multiple separate seals to form multiple seals, has a good sealing effect, and is simple to operate, and only needs to twist the inner tube to rotate the inner tube relative to the outer tube, so that the pipeline can be quickly positioned, clamped and sealed, can meet market demand, and is suitable for promotion.

Description

Technical Field

[0001] The invention belongs to the field of pipeline connecting devices, in particular to a pipeline connecting device. Background Art

[0002] FRP air duct is a product made of non-metallic composite materials. It is mainly made of resin, glass fiber and high-quality quartz sand by machine-controlled winding. It has the properties of FRP, such as corrosion resistance, high strength, long life, easy and reliable installation, etc. It is widely used in petroleum, chemical, environmental protection, drainage, ventilation, agricultural irrigation and other industries; existing round glass tube air ducts for ventilation usually adopt socket connection, and apply sealant at the socket connection to prevent air leakage at the connection. However, inferior sealant contains formaldehyde, which makes the ventilation system bring safety hazards to human health. At the same time, the use of sealant to connect FRP air ducts is not easy to disassemble, and cannot meet the needs of glass tube air duct connections that need to be disassembled frequently. Therefore, we have invented a pipe connection device for round glass tube air ducts for ventilation. Summary of the invention

[0003] The invention provides a pipeline connecting device to solve the defects in the prior art.

[0004] The present invention is achieved through the following technical solutions:

[0005] A pipeline connection device comprises an outer tube, two inner tubes are rotatably arranged inside the outer tube, a row of several slip rings are slidably arranged inside the inner tubes, adjacent slip rings are connected by elastic rubber tubes, a fixing ring fixed on the outer tube is arranged between the two inner tubes, the fixing ring is also connected to the adjacent slip rings on both sides by elastic rubber tubes, all the elastic rubber tubes, slip rings and fixing rings constitute a fixing tube, transverse strip grooves are respectively provided on the inner walls of the inner tubes, sliders are respectively fixedly installed on the slip rings, the sliders are fixedly installed on the outer circumferences of the slip rings, the sliders are slidably located in the corresponding strip grooves, several coaxial annular grooves are respectively provided on the inner circumferences of the inner tubes, the strip grooves are communicated with the annular grooves, the sliders can slide from the strip grooves into the corresponding annular grooves and slide in the annular grooves.

[0006] In the pipeline connection device as described above, coaxial rotating rings are rotatably installed in the annular slide groove through one-way bearings, and the inner circumference of the annular slide groove is provided with a plurality of slots evenly distributed in a circumference, and the slider can slide into the slots.

[0007] In the pipeline connecting device as described above, both left and right ends of the sliding block are arrow-shaped.

[0008] In the pipeline connecting device as described above, a limiting device is provided between the inner pipe and the outer pipe respectively.

[0009] A pipeline connection device as described above, the limiting device includes an insert ring, an insert rod is installed in a sliding manner inside the insert ring, the insert rod can only slide left and right in the corresponding insert ring, the outer ends of the insert rod are respectively rotatably installed with gears through one-way bearings, and a coaxial gear ring is fixedly installed on the outer periphery of the inner tube, and the gears are meshed with the gear rings.

[0010] In the pipe connecting device as described above, the insert rod and the insert ring are connected via a spring.

[0011] In the pipe connecting device as described above, a plurality of handles are fixed on the outer circumference of the outer end of the inner pipe.

[0012] The advantages of the present invention are: the present invention has a simple structure and an ingenious design, can be applied to pipe connections of various sizes, has high applicability, and is provided with multiple separate seals to form multiple seals with good sealing effect, and is simple to operate. It only requires twisting the inner pipe to rotate the inner pipe relative to the outer pipe to quickly position, clamp and seal the pipe, which can meet market demand and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A partial enlarged view of location Ⅰ; Figure 3 yes Figure 1 Left view of Figure 4 is a schematic diagram of the structure of the rotating ring; Figure 5 It is a structural diagram of the slider.

[0015] Figure numerals: 1, outer tube, 2, inner tube, 3, sliding ring, 4, elastic rubber tube, 5, fixed ring, 6, strip slide groove, 7, slider, 8, annular slide groove, 20, rotating ring, 21, slot, 51, insert ring, 52, insert rod, 53, gear, 54, gear ring, 60, spring, 70, handle. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] A pipe connection device, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, it includes an outer tube 1, and two inner tubes 2 are rotatably arranged inside the outer tube 1. The two inner tubes 2 are distributed left and right, and the inner tubes 2 are respectively coaxially arranged with the outer tube 1. The opposite ends of the two inner tubes 2 extend out of the outer tube 1, so as to facilitate the inner tube 2 to be twisted and rotated. The outer periphery of the inner tube 2 is rotatably connected with the inner periphery of the outer tube 1 through a plurality of sealed bearings. The sealed bearings increase the sealing between the outer tube 1 and the inner tube 2 and reduce the leakage of the gap between the outer tube 1 and the inner tube 2. The outer periphery of the inner tube 2 is fixedly connected with the inner ring of the sealed bearing, and the outer ring of the sealed bearing is fixedly connected with the outer tube 1. A row of a plurality of slip rings 3 are respectively slidably arranged in the inner tube 2. In this embodiment, three sliding rings 3 are slidably arranged in each inner tube 2, and adjacent sliding rings 3 are connected by elastic rubber tubes 4 respectively. A fixing ring 5 fixed on the outer tube 1 is arranged between the two inner tubes 2, and the fixing ring 5 is also connected to the adjacent sliding rings 3 on both sides by elastic rubber tubes 4 respectively. The end of the elastic rubber tube 4 close to the fixing ring 5 is the inner end of the elastic rubber tube 4, and the end of the elastic rubber tube 4 away from the fixing ring 5 is the outer end of the elastic rubber tube 4. The elastic rubber tube 4 closest to the fixing ring 5 is the innermost elastic rubber tube 4, and the elastic rubber tube 4 farthest from the fixing ring 5 is the outermost The elastic rubber tube 4 on the side, the slip ring 3, the elastic rubber tube 4 fixing ring 5 are respectively arranged coaxially with the outer tube 1, all the elastic rubber tubes 4, the slip rings 3 and the fixing rings 5 ​​form a fixing tube, the inside of the fixing tube is not connected with the inside of the outer tube 1, the inner wall of the inner tube 2 is respectively provided with a transverse strip slide groove 6, the strip slide groove 6 is parallel to the axis of the inner tube 2, the slide ring 3 is respectively fixed with a slider 7, the slider 7 is fixedly installed on the outer periphery of the slip ring 3, the slider 7 is respectively slidably located in the corresponding strip slide groove 6, the inner periphery of the inner tube 2 is respectively provided with a plurality of coaxial annular slide grooves 8, because the slider 7 on the outermost slip ring 3 does not need to be inserted Into the annular chute 8, so the number of annular chute 8 in the same inner tube 2 is one less than the number of slip rings 3. In this embodiment, two annular chute 8 are provided corresponding to the three slip rings 3, and the annular chute 8 is provided on the inner side of the corresponding slip ring 3. The side of the slip ring 3 close to the fixed ring 5 is the inner side of the slip ring 3. Since the distances of the slip ring 3 moving to the corresponding annular chute 8 are different, the distances between the slip ring 3 and the corresponding annular chute 8 are also different. The strip chute 6 is connected with the annular chute 8, and the slider 7 can slide from the strip chute 6 into the corresponding annular chute 8 and slide in the annular chute 8. The present invention has a simple structure and an ingenious design. It can be applied to pipe connections of various sizes and has high applicability. It is also provided with multiple separate seals to form multiple seals with good sealing effect and simple operation. It only needs to twist the inner tube 2 to rotate the inner tube 2 relative to the outer tube 1 to quickly position, clamp and seal the pipeline. It can meet market demand and is suitable for promotion.When using the present invention, firstly, insert the two pipes to be connected into the fixed tube. The pipes are round glass fiber reinforced plastic air ducts. The present invention is only applied to the connection of round glass fiber reinforced plastic air ducts for ventilation. The fixed docking and sealing of the two pipes are completed by the fixed tube. When fixing the pipes, make the connection of the pipes be located in the middle of the outer pipe 1 and the inside of the fixed tube. First, rotate the inner pipe 2 on one side in the positive direction. The inner pipe 2 rotates in the outer pipe 1. The inner pipe 2 drives the slider 7 and the slip ring 3 to rotate through the strip slide groove 6. The slip ring 3 drives the corresponding elastic rubber tube 4 to rotate. Since the fixed ring 5 does not rotate, the outer end of the innermost elastic rubber tube 4 rotates, and the inner end does not rotate. The middle part of the elastic rubber tube 4 begins to shrink inward and gradually fits with the outer periphery of the pipe. The pipe can gradually fit with The outer tube 1 is coaxial and positions the pipeline to facilitate the docking of the pipelines on both sides. The inner tube 2 is continued to be rotated, and the outer end of the innermost elastic rubber tube 4 gradually fits tightly against the outer periphery of the pipeline to form the first seal for the connection. At the same time, as the outer end of the elastic rubber tube 4 rotates and contracts, an inward pulling force is formed on the outer end of the elastic rubber tube 4. The elastic rubber tube 4 drives the corresponding slip ring 3 to move inward along the inner tube 2. At the same time, the slip ring 3 drives the corresponding slider 7 to move along the strip slide groove 6 until the slider 7 on the innermost slip ring 3 enters the corresponding annular slide groove 8. At this time, the inner tube 2 is continued to be rotated, and the innermost elastic rubber tube 4 no longer contracts inward. For pipelines of different diameters, the inner tube 2 rotates at different angles relative to the outer tube 1, so that the innermost The elastic rubber tube 4 is tightly fitted to the outer circumference of the pipe, and the innermost slider 7 enters the innermost annular groove 8, so that it is suitable for fixed docking of pipes with different diameters; when the slider 7 on the innermost slip ring 3 on one side enters the corresponding annular groove 8, the inner pipe 2 on the other side is rotated forwardly until the slider 7 on the innermost slip ring 3 on the other side enters the corresponding annular groove 8, and the outer pipe 1 is rotated in the opposite direction to the inner pipes 2 on both sides, so that the inner ends of the two innermost elastic rubber tubes 4 begin to gather inward, thereby increasing the fit between the elastic rubber tube 4 and the pipe, and at the same time applying pulling force to the pipes on both sides in the opposite direction to increase the sealing of the pipe connection; and then the inner pipes 2 are rotated forwardly respectively to make them close to the innermost The next elastic rubber tube 4 adjacent to the elastic rubber tube 4 on the side is retracted inwards to fix and clamp the pipe and form a second seal. Similarly, the elastic rubber tubes 4 are retracted inwards one by one from the inside to the outside to fix and clamp the pipe and form several seals. When the inward retraction degree of the outermost elastic rubber tube 4 reaches the same as the inward retraction degree of the elastic rubber tube 4 adjacent to its inner side, the inner tube 2 continues to be twisted to increase the inward retraction degree of the outermost elastic rubber tube 4, and its torsional resistance is significantly increased. At this time, the rotation of the inner tube 2 is stopped to complete the connection of the two pipes. Even if the inward retraction degree of the outermost elastic rubber tube 4 cannot reach the same as the retraction degree of the elastic rubber tube 4 adjacent to its inner side, it does not affect the seal formed by the elastic rubber tube 4 inside it.

[0018] Specifically, if Figure 1 and Figure 2 As shown, in the annular groove 8 described in this embodiment, a coaxial rotating ring 20 is rotatably installed through a one-way bearing. The annular groove 8, the one-way bearing and the rotating ring 20 are coaxially arranged. The inner ring of the one-way bearing is fixedly connected to the outer periphery of the rotating ring 20, and the outer ring is fixedly connected to the annular groove 8. A number of evenly circumferentially distributed slots 21 are opened on the inner periphery of the annular groove 8, and the slider 7 can slide into the slot 21. When the slider 7 slides from the strip slide groove 6 into the annular slide groove 8, the slider 7 enters the corresponding slot 21. When the inner tube 2 rotates forward, the rotating ring 20 cannot be driven forward by the one-way bearing to rotate forward, so the slider 7 in the slot 21 will not drive the corresponding slip ring 3 to continue to rotate forward with the inner tube 2; at the same time, the rotating ring 20 cannot rotate in the opposite direction relative to the inner tube 2, so the slider 7 in the slot 21 will not drive the corresponding slip ring 3 to rotate in the opposite direction. Therefore, when the elastic rubber tube 4 on the outer side of the slip ring 3 corresponding to the slider 7 is broken, the elastic rubber tube 4 on the inner side of the slip ring 3 will not be reset, and the clamping, fixing and sealing of the pipeline can be maintained; at the same time, the outer periphery of the slip ring 3 is respectively fitted and slidably contacted with the inner periphery of the inner tube 2 and the inner periphery of the rotating ring 20, which can increase the sliding stability of the slip ring 3 in the inner tube 2 and the rotating ring 20; when releasing the fixation, the inner tube 2 is rotated in the opposite direction, and the inner tube 2 drives the rotating ring 20 to rotate in the opposite direction synchronously, so that all the elastic rubber tubes 4 are simultaneously released from the fixation and sealing of the pipeline.

[0019] Specifically, Figure 5 As shown, the left and right ends of the slider 7 in this embodiment are both arrow-shaped, which facilitates the slider 7 to be inserted into the slot 21 or the strip-shaped slide groove 6.

[0020] Further, such as Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, a limiting device is provided between the inner tube 2 and the outer tube 1. The limiting device can limit the inner tube 2 from rotating in the reverse direction relative to the outer tube 1 after the inner tube 2 rotates in the forward direction relative to the outer tube 1.

[0021] Furthermore, Figure 1 , Figure 2 and Figure 3As shown, the limiting device of this embodiment includes an insert ring 51, two insert rings 51 are respectively fixed at the two ends of the outer tube 1, and the insert rod 52 is installed in the insert ring 51 in a sliding manner. The insert rod 52 can only slide left and right in the corresponding insert ring 51. The outer ends of the insert rod 52 are respectively installed with gears 53 through one-way bearings. The outer periphery of the inner tube 2 is fixedly installed with a coaxial gear ring 54, and the gear 53 is meshed with the gear ring 54. When the inner tube 2 rotates forward, the inner tube 2 drives the gear 53 to rotate through the gear ring 54, and the one-way bearing does not limit the forward rotation of the gear 53. When the inner tube 2 rotates in the reverse direction, it is necessary to drive the gear 53 to rotate in the reverse direction through the gear ring 54. Due to the effect of the one-way bearing, the gear 53 cannot rotate in the reverse direction relative to the insert rod 52, so it can prevent the inner tube 2 from rotating in the reverse direction and resetting; when it is necessary to release the restriction on the inner tube 2, it is only necessary to pull the insert rod 52, and the insert rod 52 drives the gear 53 to move left or right, so that the gear 53 is separated from the gear ring 54, and the inner tube 2 can rotate in the reverse direction.

[0022] Furthermore, Figure 1 and Figure 2 As shown, the plug rod 52 and the plug ring 51 of this embodiment are connected by a spring 60, which is sleeved on the outer periphery of the plug rod 52, with one end connected to the plug rod 52 and the other end connected to the plug ring 51. Under the action of the spring 60, the gear 53 and the gear ring 54 are kept in meshing cooperation; when the plug rod 52 is pulled, the corresponding spring 60 is stretched, and the spring 60 can automatically reset the plug rod 52.

[0023] Furthermore, Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, a plurality of handles 70 are fixed on the outer periphery of the outer end of the inner tube 2. The handles 70 facilitate the inner tube 2 to be twisted, which is more labor-saving.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipe connection device, comprising an outer pipe (1), two inner pipes (2) being rotatably arranged inside the outer pipe (1), characterized in that: A row of several sliding rings (3) are slidably disposed in the two inner tubes (2), and adjacent sliding rings (3) are connected to each other via elastic rubber tubes (4). A fixing ring (5) fixed to the outer tube (1) is disposed between the two inner tubes (2), and the fixing ring (5) is also connected to adjacent sliding rings (3) on both sides via elastic rubber tubes (4). All the elastic rubber tubes (4), sliding rings (3) and fixing rings (5) form a fixing tube. The inner walls of the two inner tubes (2) are respectively provided with transverse The strip chute (6) is provided in a direction, and sliders (7) are fixedly installed on the plurality of slip rings (3), and the sliders (7) are fixedly installed on the outer circumference of the slip ring (3). The sliders (7) are slidably located in the corresponding strip chute (6). The inner circumferences of the two inner tubes (2) are respectively provided with a plurality of coaxial annular chute (8), and the strip chute (6) is connected with the annular chute (8). The sliders (7) can slide from the strip chute (6) into the corresponding annular chute (8), and slide in the annular chute (8).

2. A pipe connection device according to claim 1, characterized in that: A coaxial rotating ring (20) is rotatably mounted in the annular slide groove (8) via a one-way bearing. The inner circumference of the annular slide groove (8) is provided with a plurality of slots (21) evenly distributed in a circumference, and the slider (7) can slide into the slots (21).

3. A pipe connection device according to claim 2, characterized in that: Both left and right ends of the slider (7) are arrow-shaped.

4. A pipe connection device according to claim 1, characterized in that: A limiting device is provided between the inner tube (2) and the outer tube (1).

5. A pipe connection device according to claim 4, characterized in that: The limiting device comprises an insert ring (51), an insert rod (52) is slidably mounted inside the insert ring (51), the insert rod (52) can only slide left and right inside the corresponding insert ring (51), the outer end of the insert rod (52) is rotatably mounted with a gear (53) via a one-way bearing, a coaxial gear ring (54) is fixedly mounted on the outer periphery of the inner tube (2), and the gear (53) is meshingly mounted with the gear ring (54).

6. A pipe connection device according to claim 5, characterized in that: The insert rod (52) and the insert ring (51) are connected via a spring (60).

7. A pipe connection device according to claim 1, characterized in that: A plurality of handles (70) are fixed on the outer circumference of the outer end of the inner tube (2).

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