Grooved flexible joint

Abstract

The present invention discloses a groove flexible joint, which includes a connection between a groove joint with a groove arranged on the outside, including a flexible connecting pipe, a shaping frame fixedly arranged at the end of the flexible connecting pipe, a connecting piece for connecting the flexible connecting pipe and the groove joint is sleeved on the outside of the shaping frame, and a sealing piece for sealingly connecting the groove joint and the outer side of the flexible connecting pipe is tightly connected on the connecting piece; the connecting piece includes a connecting ring, an inner limiting ring is fixedly arranged at one end of the connecting ring connected to the flexible connecting pipe, the projection of the inner limiting ring and the shaping frame along the center line direction of the flexible connecting pipe can partially overlap, and the inner limiting ring limits the connecting piece and the flexible connecting pipe from moving away from each other and separating; an outer limiting ring is fixedly arranged at one end of the connecting ring connected to the groove joint, and the inner side of the outer limiting ring can be inserted into the groove of the groove joint. The present invention has the effect of quickly performing a flexible connection between groove pipes.

Description

Technical Field

[0001] The invention relates to the technical field of flexible pipe connection, in particular to a groove flexible joint. Background Art

[0002] The pipeline groove connection is a sleeve-type quick connection that is assembled by using a special groove rolling machine to process the annular groove at the pipeline joint, and then putting a rubber seal ring on the adjacent pipe end, and assembling it with a split clamp, a C-type rubber seal ring and fasteners. The groove connection has the advantages of fast installation, simplicity, safety, reliability, economy, no welding, and no pollution. It also saves labor and labor machinery costs, and can absorb pipeline noise, vibration transmission and thermal expansion and contraction during operation, which is convenient for pipeline maintenance and maintenance, and is not restricted by the installation site. Grooved pipelines are generally suitable for life and production water supply and drainage, fire protection, air conditioning and other pipeline projects with a temperature not exceeding 80°C.

[0003] The Chinese utility model patent with the authorization announcement number CN204312865U discloses a groove pipe clamp, including two clamp rings, bolts, and nuts. The clamp rings form a semicircular notch, and the notches of the two clamp rings are spliced ​​relative to each other to form a circular channel; the two ends of the clamp ring body form lugs respectively, and the corresponding lugs of the two clamp rings are reserved with perforations; the lugs on both sides of the two clamp rings correspond to each other, and the bolts are passed through the perforations of the corresponding lugs and then the nuts are tightened to fix the connection; the two sides of the clamp ring lugs are convex outward, and the transition between the lugs and the body is inclined inward. The groove pipe clamp of this scheme can be used in the connection of grooved pipes, rolled groove pipes, and cut groove pipes.

[0004] A Chinese utility model patent with authorization announcement number CN210424101U discloses a soft connection pipeline, including a first pipeline and a second pipeline, the first pipeline and the second pipeline are connected by a flexible connector, the flexible connector includes an aluminum alloy bellows, flanges are respectively provided at both ends of the aluminum alloy bellows, and are fixedly connected to the first pipeline and the second pipeline through the flanges, plug-in tubes are respectively provided at both ends of the aluminum alloy bellows, and the two plug-in tubes are respectively inserted into the first pipeline and the second pipeline. The advantage of the soft connection pipeline is that it has good sealing performance.

[0005] The above-mentioned prior art solutions have the following defects: the existing groove pipe flexible connection method generally fixes the flange joint on the pipe, and then uses a hose with flange joints at both ends to achieve the flexible connection between the pipes through the flange, and the connection operation process is complicated and time-consuming. Summary of the invention

[0006] The object of the present invention is to provide a groove flexible joint, which has the effect of quickly performing flexible connection between groove pipes.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A groove flexible joint, used for connecting with a groove joint with a groove on the outside, comprising a flexible connecting pipe, a rigid shaping frame fixedly provided at the end of the flexible connecting pipe, a connecting piece for connecting the flexible connecting pipe and the groove joint is sleeved on the outside of the shaping frame, and a sealing piece for sealingly connecting the groove joint and the outer side of the flexible connecting pipe is tightly connected to the connecting piece;

[0009] The connecting piece includes a connecting ring, and an inner limiting ring is fixedly arranged at one end of the connecting ring connected to the flexible connecting pipe. The inner limiting ring and the projection of the shaping frame along the center line of the flexible connecting pipe can partially overlap, and the inner limiting ring limits the connecting piece and the flexible connecting pipe from moving away from each other and separating;

[0010] An outer stop ring is fixedly arranged at one end of the connecting ring connected to the groove joint, and the inner side of the outer stop ring can be inserted into the groove of the groove joint;

[0011] The sealing member comprises an inner sealing ring used for sealing between the shaped frame and the connecting member, and the sealing member comprises an outer sealing ring used for sealing between the outer surface of the groove joint and the connecting member.

[0012] By adopting the above technical scheme, after the shaping frame is aligned with the groove joint, the connecting piece is sleeved on the outside of the flexible connecting pipe and the groove joint, the ports of the shaping frame and the groove joint are located between the inner limit ring and the outer limit ring, and the outer limit ring is located in the groove of the groove joint, the inner limit ring is located on the side of the shaping frame facing away from the groove joint, blocking the groove joint and the shaping frame from moving away from each other, the flexible connecting pipe can withstand a certain pressure, the sealing piece is used to maintain the seal between the flexible connecting pipe and the groove joint to avoid outflow and seepage from the inner cavity of the groove flexible joint, the other end of the groove joint is connected to the joints of other pipes or valves, and is used for flexible connections between pipes and valves, suitable for the bending connection of pipes, easy to adjust and install, the connection of valves or pump ports, can absorb the vibration of the valve or pump port during use, absorb the vibration energy in the pipe, and improve the stability of the pipe connection. At the same time, the installation and construction of the groove flexible joint is convenient and low in cost.

[0013] The present invention is further configured such that: the opposite ends of the inner sealing ring and the outer sealing ring are tightly connected.

[0014] By adopting the above technical solution, the sealing connection at the opposite ends of the inner sealing ring and the outer sealing ring can prevent the fluid in the inner cavity of the groove flexible joint from entering the gap between the inner sealing ring and the outer sealing ring and then seeping out between the seal and the connector, thereby ensuring a good sealing effect of the seal.

[0015] The present invention is further configured as follows: the outer side surface of the outer sealing ring contacts the inner side surface of the connecting ring, the surface of the outer sealing ring opposite to the inner sealing ring contacts the surface of the outer limiting ring facing the inner limiting ring, and the inner side surface of the outer sealing ring contacts the outer surface of the groove joint;

[0016] A pressing groove is formed on the surface of the outer sealing ring facing the inner sealing ring.

[0017] By adopting the above technical solution, when pressurized fluid flows through the groove flexible joint, the pressurized fluid can enter the clamping groove, and the pressurized fluid exerts a force on the side of the clamping groove. As the pressure in the fluid increases, the pressure between the outer sealing ring and the outer side of the groove joint increases, and the sealing performance of the outer sealing ring between the groove joint and the connecting piece increases.

[0018] The present invention is further configured as follows: the soft connecting tube includes a tubular flexible supporting layer, the soft connecting tube includes a sealing layer located inside the flexible supporting layer, and the sealing layer blocks the fluid in the inner cavity of the soft connecting tube from flowing out.

[0019] By adopting the above technical solution, the pressure fluid in the groove flexible joint exerts pressure on the closed layer, and the pressure borne by the closed layer is transmitted to the flexible supporting layer. The flexible supporting layer is the supporting skeleton of the flexible connecting pipe, which maintains the stability of the closed layer. The closed layer has good density and keeps the fluid of the flexible connecting pipe flowing in its inner cavity.

[0020] The present invention is further configured as follows: the flexible connecting pipe includes a protective layer located outside the flexible supporting layer.

[0021] By adopting the above technical solution, the protective layer can protect the outer side of the flexible support layer, reducing the erosion and wear of the flexible support layer by foreign substances when the groove flexible joint is in use.

[0022] The present invention is further configured such that: the shaping frame is located in the flexible supporting layer.

[0023] By adopting the above technical solution, the shaping frame located in the flexible supporting layer can avoid contact with the fluid in the groove flexible joint while maintaining the connection between the flexible pipe and the connecting piece, thereby slowing down the corrosion of the shaping frame.

[0024] The present invention is further configured as follows: the shaping frame is a circular ring connected to the flexible connecting pipe, and the protective layer, the sealing layer, the inner sealing ring and the outer sealing ring are integrally formed.

[0025] By adopting the above technical scheme, the annular forming frame has a stable structure and uniform force, the protective layer, the sealing layer, the inner sealing ring and the outer sealing ring are integrally formed, the sealing performance of the seal is high, the production cost of the groove flexible joint is reduced, and the mass production of the groove flexible joint is convenient.

[0026] The present invention is further configured as follows: both ends of the flexible connecting pipe are fixedly provided with a shaping frame, and both ends of the flexible connecting pipe are provided with a connecting piece and a sealing piece.

[0027] By adopting the above technical solution, both ends of the flexible connecting pipe can be quickly connected to the two groove joints through the shaping frame, the connecting piece and the sealing piece.

[0028] The present invention is further configured as follows: the flexible connecting tube is a spherical tube whose inner diameter gradually decreases from the middle to both ends along the center line direction.

[0029] By adopting the above technical solution, the structure of the flexible connecting pipe can maintain good stability when the axes of the two ports of the flexible connecting pipe are staggered or at a certain angle.

[0030] The present invention is further configured such that: the connecting piece is an existing pipe clamp.

[0031] By adopting the above technical solution, existing pipe clamps are used as connectors, the cost of the groove flexible joint is reduced, and workers can directly perform installation operations without other training.

[0032] In summary, the present invention includes at least one of the following beneficial effects:

[0033] 1. After aligning the shaped frame with the groove joint, the connector is sleeved on the outside of the flexible pipe and the groove joint. The ports of the shaped frame and the groove joint are located between the inner limit ring and the outer limit ring, and the outer limit ring is located in the groove of the groove joint. The inner limit ring is located on the side of the shaped frame facing away from the groove joint to prevent the groove joint and the shaped frame from moving away from each other. The flexible pipe can withstand a certain pressure. The seal is used to maintain the seal between the flexible pipe and the groove joint to avoid outflow and seepage from the inner cavity of the groove flexible joint. The other end of the groove joint is connected to the joint of other pipes or valves for flexible connection between pipes and valves. It is suitable for the bending connection of the pipe, which is convenient for adjustment and installation. The connection of the valve or pump port can absorb the vibration of the valve or pump port during use, absorb the vibration energy in the pipe, and improve the stability of the pipe connection. At the same time, the installation and construction of the groove flexible joint is convenient and low in cost.

[0034] 2. When the pressurized fluid flows through the groove flexible joint, the pressurized fluid can enter the compression groove, and the pressurized fluid exerts a force on the side of the compression groove. As the pressure in the fluid increases, the pressure between the outer sealing ring and the outer side of the groove joint increases, and the sealing performance of the outer sealing ring between the groove joint and the connector becomes higher;

[0035] 3. The circular shaping frame has a stable structure and uniform force. The protective layer, sealing layer, inner sealing ring and outer sealing ring are integrally formed. The sealing performance of the seal is high, which reduces the production cost of the groove flexible joint and facilitates the mass production of the groove flexible joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall half-section structure of the first embodiment;

[0037] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0038] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the connection between the sealing member and the connecting member in the third embodiment.

[0039] In the figure, 1, groove joint; 2, soft connecting pipe; 21, flexible supporting layer; 22, sealing layer; 23, protective layer; 3, shaping frame; 4, connecting piece; 41, connecting ring; 42, inner limiting ring; 43, outer limiting ring; 5, sealing piece; 51, inner sealing ring; 52, outer sealing ring; 53, clamping groove. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0041] Embodiment 1

[0042] Reference Figure 1 and Figure 2 The present invention discloses a groove flexible joint, which is used for connecting with a groove joint 1 with a groove on the outside. The groove joint 1 is a joint made by using a groove machine on the outside of a pipe port, and the groove is one end distance away from the port of the groove joint 1.

[0043] The groove flexible joint includes a flexible connecting tube 2, which includes a tubular flexible supporting layer 21. The flexible supporting layer 21 is a cord fabric in this embodiment, which is the skeleton material of the tire casing. In other embodiments, it can be other flexible materials that can withstand tension, such as a wire mesh. The flexible connecting tube 2 includes a closed layer 22 located inside the flexible supporting layer 21. The closed layer 22 is a rubber layer in this embodiment, and can be other flexible and dense layers in other embodiments. The closed layer 22 blocks the fluid in the inner cavity of the flexible connecting tube 2 from flowing out.

[0044] The pressure fluid in the groove flexible joint exerts pressure on the sealing layer 22, and the pressure on the sealing layer 22 is transmitted to the flexible supporting layer 21. The flexible supporting layer 21 is the supporting skeleton of the flexible connecting pipe, maintaining the stability of the sealing layer 22. The sealing layer 22 has good density and keeps the fluid of the flexible connecting pipe 2 flowing in its inner cavity.

[0045] The flexible joint 2 includes a protective layer 23 located outside the flexible support layer 21. The protective layer 23 is a rubber layer in this embodiment. The protective layer 23 can protect the outside of the flexible support layer 21 and reduce the erosion and wear of the flexible support layer 21 by foreign substances when the groove flexible joint is in use.

[0046] The flexible connecting tube 2 includes a spherical tube with a uniform wall thickness in the middle and a gradually decreasing inner diameter from the middle to both ends along the center line direction, and the flexible connecting tube 2 includes end shaped tubes with uniform inner diameters at both ends of the spherical tube. The flexible connecting tube 2 can maintain good stability when the axes of the two ports of the flexible connecting tube 2 are staggered or at a certain angle.

[0047] Rigid shaping frames 3 are fixedly arranged at both ends of the flexible connecting pipe 2. The shaping frames 3 are circular rings connected to the flexible connecting pipe 2. The shaping frames 3 are located in the flexible supporting layer 21. The shaping frames 3 are located at the two end shaped pipe parts of the flexible connecting pipe 2. The shaping frames 3 located in the flexible supporting layer 21 can avoid contact with the fluid in the groove flexible joint while maintaining the connection between the flexible connecting pipe 2 and the connecting piece 4, thereby slowing down the corrosion of the shaping frames 3.

[0048] A connector 4 for connecting the flexible pipe 2 and the groove joint 1 is sleeved on the outer side of the shaping frame 3, and the connector 4 includes a connecting ring 41, which is a circular ring. An inner limit ring 42 is fixedly arranged at one end of the connecting ring 41 connected to the flexible pipe 2, and the inner diameter of the inner limit ring 42 gradually decreases in the direction away from the connecting ring 41. The wall thickness of the inner limit ring 42 is the same, and the inner diameter of the inner limit ring 42 is a circular ring with a fixed inner diameter along the end away from the connecting ring 41. The inner limit ring 42 is integrally formed with the connecting ring 41, and the projection of the inner limit ring 42 and the shaping frame 3 along the center line direction of the flexible pipe 2 can partially overlap, and the inner limit ring 42 limits the connector 4 and the flexible pipe 2 from moving away from each other and separating.

[0049] An outer limit ring 43 is fixedly provided at one end of the connecting ring 41 connected to the groove joint 1. The inner diameter of the outer limit ring 43 gradually decreases in the direction away from the connecting ring 41. The wall thickness of the outer limit ring 43 is the same. The outer limit ring 43 and the connecting ring 41 are integrally formed. The inner diameter of the outer limit ring 43 is a circular ring with a fixed inner diameter along the end away from the connecting ring 41 and is smaller than the inner diameter of other parts of the outer limit ring 43. The circular ring on the inner side of the outer limit ring 43 can be inserted into the groove of the groove joint 1.

[0050] The connecting member 4 is an existing pipe clamp in this embodiment, which can also be called a pipe hoop or a groove pipe fitting. The pipe clamp is two semi-circular ring-shaped clamps connected by bolts. In other embodiments, the pipe clamp is two semi-circular ring-shaped clamps with one end hinged and the other end connected by bolts. In other embodiments, it can also be other arc-shaped parts with U-shaped cross-sections that can be pressed and connected to each other.

[0051] Using the existing pipe clamp as the connecting piece 4 reduces the cost of the groove flexible joint, and workers can directly perform the installation operation without other training.

[0052] The connector 4 is tightly connected with a seal 5 that seals the outer side of the groove joint 1 and the flexible pipe 2. The overall structure of the seal 5 is an annular tubular structure. The seal 5 includes an inner seal ring 51 for sealing between the calibrating frame 3 and the connector 4, and an outer seal ring 52 for sealing between the outer surface of the groove joint 1 and the connector 4.

[0053] The inner sealing ring 51 and the outer sealing ring 52 are sealed at opposite ends. The cross section of the inner sealing ring 51 is similar to a right-angled trapezoid. In this embodiment, the protective layer 23, the sealing layer 22, the inner sealing ring 51 and the outer sealing ring 52 are integrally formed and can be directly produced and formed using rubber.

[0054] The sealing connection at the opposite ends of the inner sealing ring 51 and the outer sealing ring 52 can prevent the fluid in the inner cavity of the groove flexible joint from entering the gap between the inner sealing ring 51 and the outer sealing ring 52 and then seeping out between the sealing member 5 and the connecting member 4, thereby ensuring a good sealing effect of the sealing member 5.

[0055] The outer side surface of the outer sealing ring 52 contacts the inner side surface of the connecting ring 41, the surface of the outer sealing ring 52 opposite to the inner sealing ring 51 contacts the surface of the outer limiting ring 43 facing the inner limiting ring 42, and the inner side surface of the outer sealing ring 52 contacts the outer surface of the groove joint 1; a clamping groove 53 is provided on the surface of the outer sealing ring 52 facing the inner sealing ring 51.

[0056] When pressurized fluid flows through the groove flexible joint, the pressurized fluid can enter the clamping groove 53, and the pressurized fluid exerts a force on the side of the clamping groove 53. As the pressure inside the fluid increases, the pressure between the outer sealing ring 52 and the outer side of the groove joint 1 increases, and the sealing performance of the outer sealing ring 52 between the groove joint 1 and the connecting piece 4 increases.

[0057] The implementation principle of the above embodiment is:

[0058] After aligning the shaped frame 3 with the groove joint 1, the connecting piece 4 is sleeved on the outside of the flexible connecting pipe 2 and the groove joint 1, the ports of the shaped frame 3 and the groove joint 1 are located between the inner limit ring 42 and the outer limit ring 43, and the outer limit ring 43 is located in the groove of the groove joint 1, the inner limit ring 42 is located on the side of the shaped frame 3 facing away from the groove joint 1, blocking the groove joint 1 and the shaped frame 3 from moving away from each other, the flexible connecting pipe 2 can withstand a certain pressure, the sealing member 5 is used to maintain the seal between the flexible connecting pipe 2 and the groove joint 1, the other end of the groove joint 1 is connected to the groove joint 1 of other pipes or valves, which is convenient for adjustment and installation, and the installation and construction of the groove flexible joint is convenient and low in cost.

[0059] Embodiment 2

[0060] A groove flexible joint, which is different from the embodiment 1 in that a shaping frame 3 is fixedly provided at one end of the flexible connecting pipe 2, and a connector 4 and a seal 5 are provided at the end of the flexible connecting pipe 2 where the shaping frame 3 is provided. A flange joint is fixedly provided at the other end of the flexible connecting pipe 2, and the end of the flexible connecting pipe 2 connected to the flange joint is connected to the existing hose flange joint. It is suitable for connecting one end to the groove joint 1 and the other end to the flange joint. In other embodiments, the other end of the flexible connecting pipe 2 can be provided with other connection methods to quickly connect with the pipeline.

[0061] The angle between the axes of the two ports of the flexible connecting pipe 2 can be any angle greater than 0° and less than or equal to 180°, and in this embodiment it is 90°. It is suitable for fast and stable connection at the bend of the grooved pipe and at different axes.

[0062] Embodiment 3

[0063] Reference Figure 3 , a groove flexible joint, which is different from the embodiment 1 in that the inner sealing ring 51 and the outer sealing ring 52 are separately provided. The outer sealing ring 52 is an annular sealing ring provided in the groove of the groove joint 1, and the outer limit ring 43, the outer sealing ring 52 and the groove joint 1 are tightly connected.

[0064] The inner sealing ring 51 is an annular sealing ring sleeved on the outer side of the shaping frame 3 , and the shaping frame 3 , the inner sealing ring 51 and the connecting member 4 are tightly connected.

[0065] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A groove flexible joint, characterized in that: Used for connection with a groove joint (1) with a groove on the outside, comprising a flexible connecting pipe (2), the end of the flexible connecting pipe (2) is fixedly provided with a rigid shaping frame (3), the outside of the shaping frame (3) is sleeved with a connecting piece (4) for connecting the flexible connecting pipe (2) and the groove joint (1), and the connecting piece (4) is tightly connected with a sealing piece (5) for sealingly connecting the groove joint (1) and the outer side of the flexible connecting pipe (2); The connecting member (4) comprises a connecting ring (41), one end of the connecting ring (41) connected to the flexible connecting tube (2) is fixedly provided with an inner limiting ring (42), the projection of the inner limiting ring (42) and the shaping frame (3) along the center line direction of the flexible connecting tube (2) can partially overlap, and the inner limiting ring (42) limits the connecting member (4) and the flexible connecting tube (2) from moving away from each other and separating; An outer limiting ring (43) is fixedly provided at one end of the connecting ring (41) connected to the groove joint (1), and the inner side of the outer limiting ring (43) can be inserted into the groove of the groove joint (1); The sealing member (5) comprises an inner sealing ring (51) for sealing between the shaped frame (3) and the connecting member (4), and the sealing member (5) comprises an outer sealing ring (52) for sealing between the outer surface of the groove joint (1) and the connecting member (4); The outer side surface of the outer sealing ring (52) contacts the inner side surface of the connecting ring (41), the surface of the outer sealing ring (52) opposite to the inner sealing ring (51) contacts the surface of the outer limiting ring (43) facing the inner limiting ring (42), and the inner side surface of the outer sealing ring (52) contacts the outer surface of the groove joint (1); The outer sealing ring (52) is provided with a pressing groove (53) on the surface facing the inner sealing ring (51); The inner sealing ring (51) and the outer sealing ring (52) are tightly connected at opposite ends; The flexible connecting tube (2) comprises a tubular flexible supporting layer (21), and the flexible connecting tube (2) comprises a sealing layer (22) located inside the flexible supporting layer (21), wherein the sealing layer (22) blocks the fluid in the inner cavity of the flexible connecting tube (2) from flowing out.

2. The groove flexible joint according to claim 1, characterized in that: The flexible connecting pipe (2) comprises a protective layer (23) located outside the flexible supporting layer (21).

3. The groove flexible joint according to claim 1, characterized in that: The shaping frame (3) is located inside the flexible supporting layer (21).

4. The groove flexible joint according to claim 2, characterized in that: The shaping frame (3) is a circular ring connected to the flexible connecting pipe (2), and the protective layer (23), the sealing layer (22), the inner sealing ring (51) and the outer sealing ring (52) are integrally formed.

5. The groove flexible joint according to claim 1, characterized in that: Both ends of the flexible connecting pipe (2) are fixedly provided with a shaping frame (3), and both ends of the flexible connecting pipe (2) are provided with a connecting piece (4) and a sealing piece (5).

6. The groove flexible joint according to claim 1, characterized in that: The flexible connecting tube (2) is a spherical tube whose inner diameter gradually decreases from the middle to both ends along the center line direction.

7. The groove flexible joint according to claim 1, characterized in that: The connecting piece (4) is an existing pipe clamp.

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