Liquid line connection

Abstract

The utility model discloses liquid pipeline connector relates to pipeline connection technical field, the utility model discloses a connecting head body and two plastic tubes, the connecting head body includes two joint parts, the joint part includes the joint pipe, be provided with fixed pipe and outer tube on the joint pipe, the fixed pipe constructs on the stepped groove, the stepped groove is swinged and is inserted with the locating ring, a plurality of arc plates are slidably arranged on the locating ring, be provided with extrusion spring between the arc plate and the locating ring, be provided with a plurality of clamping tooth on the arc plate, and the free end of plastic tube and joint pipe resist and overlap. The utility model overcomes the technical defects of traditional screw type connector under the dynamic working environment, can satisfy the stable connection demand under the long -term vibration environment when using, avoids the connection loose phenomenon caused by the persistent attenuation of pre -tightening force, reduces the risk of medium leakage, the frequency of equipment maintenance, the risk of system pressure instability, therefore more has the practicality.

Description

Technical Field

[0001] This application relates to the field of pipeline connection technology, specifically to liquid pipeline connectors. Background Technology

[0002] Liquid pipelines are specialized piping systems designed to transport liquid substances, serving as core infrastructure for fluid transmission in industrial, municipal, and construction sectors. Common liquid pipeline materials include metal and plastic. Connectors are required when connecting two liquid pipelines. Currently, commonly used liquid pipeline connectors in the industrial field include quick-connect fittings, threaded fittings, flanged connectors, sanitary clamp fittings, and flared sealing fittings. Traditional threaded fittings remain one of the most widely used connection methods in industrial pipelines due to their simple structure and low manufacturing cost. However, in dynamic working environments (such as hydraulic systems of mobile equipment and lubrication pipelines of vibrating screens), traditional threaded fittings exhibit significant technical defects: when the system is subjected to periodic vibration loads, the threaded pair experiences continuous attenuation of preload due to fretting wear, leading to connection loosening. This structural failure under dynamic conditions not only causes media leakage and increases equipment maintenance frequency but may also lead to safety hazards such as system pressure instability. Existing threaded fittings are insufficient to meet the stable connection requirements under long-term vibration environments; therefore, liquid pipeline connectors have been developed. Utility Model Content

[0003] The purpose of this application is to provide a liquid pipeline connector to solve the technical problem that existing threaded connectors cannot meet the requirements for stable connection under long-term vibration environment.

[0004] To achieve the above objectives, this application specifically adopts the following technical solution:

[0005] A liquid pipeline connector includes a connector body and two plastic tubes. The connector body includes two joint portions, each joint portion including a joint tube. The joint tube is provided with a fixed tube and an outer tube. The fixed tube has a stepped groove, and a positioning ring is movably inserted into the stepped groove. Multiple arc-shaped plates are slidably arranged on the positioning ring. A compression spring is provided between the arc-shaped plates and the positioning ring. Multiple locking teeth are provided on the arc-shaped plates. The free end of the plastic tube abuts and overlaps with the joint tube, and the outer surface abuts and overlaps with the positioning ring and the arc-shaped plates. A screw cylinder is threaded onto the fixed tube. The screw cylinder is provided with a conical ring that abuts and overlaps with the arc-shaped plates. The outer tube is provided with a locking element for locking or unlocking the screw cylinder.

[0006] Furthermore, a sealing ring is movably inserted into the stepped groove. The sealing ring has an inner surface and a first surface and a second surface that are vertically distributed. A first sealing groove is constructed on the inner surface, the first surface and the second surface, and a first sealing ring is snapped into the first sealing groove.

[0007] Furthermore, the connector tube is provided with a second sealing groove, and a second sealing ring is engaged in the second sealing groove, with the free end of the sealing ring and the second sealing ring abutting and overlapping.

[0008] Furthermore, the outer surface of the screw barrel is provided with multiple fixing blocks.

[0009] Furthermore, the locking component includes an outer ring movably sleeved on the outer tube, a compression spring is provided between the outer ring and the outer tube, the outer ring has a connected first annular surface and a second annular surface, the outer tube is constructed with a plurality of receiving cavities, a retaining bead is movably disposed in the receiving cavity, the outer surface of the screw cylinder is constructed with a locking groove, the retaining bead and the screw cylinder, the first annular surface and the second annular surface are all rollingly overlapped, and the retaining bead and the locking groove are engaged.

[0010] Furthermore, the screw cylinder is provided with a guide cone surface, and a transition cone surface is provided at the junction of the first annular surface and the second annular surface.

[0011] Furthermore, the receiving cavity includes a communicating cylindrical groove and a conical groove, and the diameter of the retaining bead corresponds to the diameter of the cylindrical groove.

[0012] Furthermore, the locking groove includes an annular segment and two symmetrically distributed conical segments.

[0013] The beneficial effects of this application are as follows: This application overcomes the technical defects of traditional threaded connectors in dynamic working environments. When in use, it can meet the stable connection requirements under long-term vibration environments, avoid connection loosening caused by continuous decay of preload, reduce the risk of media leakage, the frequency of equipment maintenance, and the risk of system pressure instability, and is therefore more practical. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural view of this application;

[0015] Figure 2 This is the left view of the structure of this application;

[0016] Figure 3 This application Figure 2 A sectional view;

[0017] Figure 4 This application Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This application Figure 3 Enlarged view of point B in the middle;

[0019] Figure 6 This application Figure 3 Enlarged view of point C in the middle;

[0020] Figure 7 This application Figure 3 Enlarged view of point D in the middle.

[0021] Reference numerals: 1. Plastic tube; 2. Connector tube; 3. Fixing tube; 4. Outer tube; 5. Stepped groove; 6. Positioning ring; 7. Arc plate; 8. Compression spring; 9. Clamping tooth; 10. Screw; 11. Conical ring; 12. Sealing ring; 13. First sealing groove; 14. First sealing ring; 15. Second sealing groove; 16. Second sealing ring; 17. Fixing block; 18. Outer ring; 19. Compression spring; 20. First annular surface; 21. Second annular surface; 22. Receiving cavity; 23. Clamping bead; 24. Locking groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figures 1-7 As shown, a liquid pipeline connector proposed in one embodiment of this application includes a connector body and two plastic tubes 1. The connector body includes two joints, which are symmetrically distributed and fixedly connected. The two plastic tubes 1 correspond to the two joints respectively.

[0024] The distinguishing technical features of this application also include: the connector includes a connector tube 2, with the opposite ends of two connector tubes 2 fixedly connected. A fixed tube 3 and an outer tube 4 are provided on the connector tube 2. Both the fixed tube 3 and the outer tube 4 are fixed on the connector tube 2 and are coaxially distributed. The fixed tube 3 is located at the free end of the connector tube 2, and the outer tube 4 is located on the outer surface of the connector tube 2. A stepped groove 5 is constructed on the fixed tube 3, and the stepped groove 5 is coaxially distributed with the connector tube 2. A positioning ring 6 is movably inserted into the stepped groove 5, and the positioning ring 6 moves along the length direction of the stepped groove 5. Multiple arc-shaped plates 7 are slidably arranged on the positioning ring 6, and the multiple arc-shaped plates 7 are arranged in a circular array around the axis of the positioning ring 6. The sliding direction of the arc-shaped plates 7 is perpendicular to the axis of the positioning ring 6. A compression spring 8 is provided between the arc-shaped plates 7 and the positioning ring 6, with each end of the compression spring 8... The plastic tube 1 is fixedly connected to the arc plate 7 and the positioning ring 6. The arc plate 7 is provided with multiple locking teeth 9, which are all fixed on the inner surface of the arc plate 7 and evenly distributed. The free end of the plastic tube 1 and the connector tube 2 abut against each other, and the outer surface abuts against the positioning ring 6 and the arc plate 7. The screw tube 3 is threaded with a screw cylinder 10, which abuts against the connector tube 2, the fixed tube 3 and the outer tube 4. The screw cylinder 10 is provided with a conical ring 11 that abuts against the arc plate 7. The conical ring 11 is fixed on the inner surface of the screw cylinder 10 and the two are coaxially distributed. The outer tube 4 is provided with a locking element for locking or unlocking the screw cylinder 10. Locking here means that the screw cylinder 10 cannot move along the length direction of the fixed tube 3, and unlocking means that the screw cylinder 10 can move along the length direction of the fixed tube 3.

[0025] In the initial state, the compression spring 8 is in its natural state, and the arc plate 7 is in its initial position and away from the axis of the positioning ring 6. During use, the positioning ring 6 is movably inserted into the stepped groove 5, and the screw cylinder 10 is threaded onto the fixed tube 3, causing the free end of the plastic tube 1 to abut against the connector tube 2, and the outer surface of the plastic tube 1 to abut against the positioning ring 6. The screw cylinder 10 is then tightened until it abuts against the connector tube 2, the fixed tube 3, and the outer tube 4. The screw cylinder 10 drives the conical ring 11 to move together. The conical surface of the conical ring 11 first abuts against multiple arc plates 7. Through the transition effect of the conical surface, multiple arc plates 7 are forced to slide synchronously to a position close to the axis of the positioning ring 6, compressing multiple compression springs 8 until multiple arc plates 7 abut against the outer surface of the plastic tube 1. The arc surface of the rear conical ring 11 abuts against and overlaps with multiple arc plates 7. Multiple locking teeth 9 on the arc plates 7 will tightly bite and embed into the outer surface of the plastic tube 1. Then, the screw cylinder 10 is locked by the locking device. The screw cylinder 10 cannot move along the length direction of the fixed tube 3, that is, the screw cylinder 10 cannot rotate, so as to connect the two plastic tubes 1. Conversely, when disassembling, the screw cylinder 10 is unlocked by the locking device, and the screw cylinder 10 can move along the length direction of the fixed tube 3, that is, the screw cylinder 10 can rotate away from the fixed tube 3. The screw cylinder 10 drives the conical ring 11 to move away from the multiple arc plates 7. Multiple compression springs 8 are all reset to their natural state. The arc plates 7 slide to their initial position due to elastic potential energy. The multiple locking teeth 9 on the arc plates 7 are all away from the outer surface of the plastic tube 1, so that the free end of the plastic tube 1 is away from the connector tube 2.

[0026] In summary, this application overcomes the technical defects of traditional threaded connectors in dynamic working environments. When in use, it can meet the stable connection requirements under long-term vibration environments, avoid connection loosening caused by continuous decay of preload, reduce the risk of media leakage, the frequency of equipment maintenance, and the risk of system pressure instability, and is therefore more practical.

[0027] like Figure 4 As shown, a further technical solution of this application is disclosed. A sealing ring 12 is movably inserted into the stepped groove 5. The sealing ring 12 moves along the length direction of the stepped groove 5. The free end of the sealing ring 12 abuts and overlaps with the connector tube 2. The sealing ring 12 has an inner surface and a first surface and a second surface that are vertically distributed. The distribution of the first surface and the second surface is as follows: Figure 4 As shown, a first sealing groove 13 is constructed on the inner surface, the first surface, and the second surface. The first sealing groove 13 is annular in shape. Multiple first sealing grooves 13 are coaxially distributed with the sealing ring 12. A first sealing ring 14 is snapped into the first sealing groove 13. The first sealing ring 14 is made of rubber and can be deformed.

[0028] Referring to the above, during use, the sealing ring 12 is first movably inserted into the stepped groove 5, so that the free end of the sealing ring 12 and the connector tube 2 abut and overlap. During this process, the first sealing ring 14 in the first sealing groove 13 on the first and second surfaces deforms. Then, the positioning ring 6 is movably inserted into the stepped groove 5, so that the positioning ring 6 and the sealing ring 12 abut and overlap. When the free end of the plastic tube 1 and the connector tube 2 abut and overlap, the outer surface of the plastic tube 1 and the sealing ring 12 abut and overlap, forcing the first sealing ring 14 in the first sealing groove 13 on the inner surface to deform. When the liquid flows, multiple first sealing grooves 13 and multiple first sealing rings 14 together form a multi-seal structure, thereby improving the sealing performance.

[0029] like Figure 4 As shown, a further technical solution of this application is disclosed. A second sealing groove 15 is constructed on the connector tube 2. The second sealing groove 15 is annular and coaxially distributed with the connector tube 2. A second sealing ring 16 is snapped into the second sealing groove 15. The material of the second sealing ring 16 is rubber and it can be deformed. The free end of the sealing ring 12 and the second sealing ring 16 abut and overlap.

[0030] Referring to the above, when the sealing ring 12 is movably inserted into the stepped groove 5, the free end of the sealing ring 12 will abut and overlap with the second sealing ring 16, forcing the second sealing ring 16 to deform. Through the cooperation of the second sealing groove 15 and the second sealing ring 16, a sealing structure is formed together, thereby further improving the sealing performance.

[0031] like Figure 1 As shown, a further technical solution of this application is disclosed. A plurality of fixing blocks 17 are provided on the outer surface of the screw barrel 10. The plurality of fixing blocks 17 are fixed on the outer surface of the screw barrel 10 and distributed in a ring array. In this embodiment, the number of fixing blocks 17 is six, and the six fixing blocks 17 together form a structure similar to an external hexagonal bolt.

[0032] Referring to the above, when turning the screw barrel 10, it can be operated directly by hand. The six fixing blocks 17 can increase the friction between the hand and the screw barrel 10. Alternatively, a tool can be used to apply force to the six fixing blocks 17 to loosen the screw barrel 10, making it more convenient to use.

[0033] like Figures 6-7As shown, a further technical solution of this application is disclosed. The locking component includes an outer ring 18 movably sleeved on the outer tube 4. The outer ring 18 moves along the length direction of the outer tube 4 and the two are coaxially distributed. A compression spring 19 is provided between the outer ring 18 and the outer tube 4. The two ends of the compression spring 19 are fixedly connected to the outer ring 18 and the outer tube 4, respectively. The outer ring 18 has a first annular surface 20 and a second annular surface 21 connected to each other. The first annular surface 20 abuts and overlaps with the screw cylinder 10. The second annular surface 21 is away from the screw cylinder 10. A plurality of receiving cavities 22 are constructed on the outer tube 4. The plurality of receiving cavities 22 are arranged in a ring array along the axis of the outer tube 4. The length direction of the receiving cavities 22 is perpendicular to the axis of the outer tube 4. A retaining bead 23 is movably disposed in the receiving cavity 22. A locking groove 24 is constructed on the outer surface of the screw cylinder 10. The retaining bead 23 rolls and overlaps with the screw cylinder 10, the first annular surface 20 and the second annular surface 21. The retaining bead 23 and the locking groove 24 are engaged.

[0034] Referring to the above, in the initial state, the outer ring 18 is in the initial position, the compression spring 19 is in its natural state, and the retaining beads 23 are partially located in the receiving cavity 22. The first annular surface 20 and the multiple retaining beads 23 roll and overlap. When the screw cylinder 10 is tightened, the outer ring 18 moves to its limit position, the compression spring 19 is compressed, and the first annular surface 20 moves away from the multiple retaining beads 23. Then, the retaining beads 23 roll and overlap with the outer surface of the screw cylinder 10. The screw cylinder 10 forces the retaining beads 23 to move in the receiving cavity 22 and roll and overlap with the second annular surface 21. When the screw cylinder 10 and the connector tube 2 come into contact and overlap, the outer ring 18 is released, the compression spring 19 returns to its natural state, and the outer ring 18, due to its elastic potential energy... When the screw cylinder 10 moves to its initial position, the first annular surface 20 and multiple retaining beads 23 roll and overlap, and all retaining beads 23 engage with the locking groove 24. At this time, the screw cylinder 10 cannot move, thus locking the screw cylinder 10. Conversely, when the outer ring 18 moves to its limit position, the compression spring 19 is compressed, and the first annular surface 20 moves away from the multiple retaining beads 23. Then, the screw cylinder 10 is loosened, and all retaining beads 23 exit the locking groove 24 and roll and overlap with the second annular surface 21. Then, the outer ring 18 is released, the compression spring 19 returns to its natural state, and the outer ring 18 moves to its initial position due to elastic potential energy. The first annular surface 20 and multiple retaining beads 23 roll and overlap, thus unlocking the screw cylinder 10.

[0035] like Figures 6-7 As shown, a further technical solution of this application is disclosed: a guide cone surface is constructed on the screw cylinder 10, and a transition cone surface is constructed at the connection between the first annular surface 20 and the second annular surface 21.

[0036] Referring to the above, when the screw barrel 10 and the ball bearing 23 roll and overlap, the design of the guide cone surface can play a guiding role, making the movement of the ball bearing 23 and the screw barrel 10 smoother. When the outer ring 18 moves to the initial position, the design of the transition cone surface can play a guiding role, making the movement of the ball bearing 23 smoother.

[0037] like Figure 6 As shown, a further technical solution of this application is disclosed. The receiving cavity 22 includes a cylindrical groove and a conical groove that are connected. The diameter of the retaining bead 23 corresponds to the diameter of the cylindrical groove, and the maximum diameter of the conical groove corresponds to the diameter of the retaining bead 23. Its minimum diameter is smaller than the diameter of the retaining bead 23. The retaining bead 23 can move freely through the cylindrical groove, and the retaining bead 23 is limited by the conical groove to prevent the retaining bead 23 from completely leaving the receiving cavity 22.

[0038] like Figure 6 As shown, a further technical solution of this application is disclosed. The locking groove 24 includes an annular segment and two symmetrically distributed conical segments, and the two conical segments are distributed in a ring array with the annular segment as the center.

[0039] Referring to the above, during use, the shape design of the locking groove 24 can not only lock and limit the movement of the locking ball 23, but also serve as a guide, making the movement of the locking ball 23 and the screw cylinder 10 smoother.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid pipeline connector, comprising a connector body and two plastic tubes (1), wherein the connector body comprises two joint portions, characterized in that, The connector includes a connector tube (2), a fixed tube (3) and an outer tube (4) are provided on the connector tube (2), a stepped groove (5) is constructed on the fixed tube (3), a positioning ring (6) is movably inserted into the stepped groove (5), a plurality of arc plates (7) are slidably provided on the positioning ring (6), a compression spring (8) is provided between the arc plate (7) and the positioning ring (6), a plurality of locking teeth (9) are provided on the arc plate (7), the free end of the plastic tube (1) abuts and overlaps with the connector tube (2), the outer surface abuts and overlaps with the positioning ring (6) and the arc plate (7), a screw cylinder (10) is threaded onto the fixed tube (3), a conical ring (11) is provided on the screw cylinder (10) and abuts and overlaps with the arc plate (7), and a locking element for locking or unlocking the screw cylinder (10) is provided on the outer tube (4).

2. The liquid pipeline connector according to claim 1, characterized in that, A sealing ring (12) is movably inserted into the stepped groove (5). The sealing ring (12) has an inner surface and a first surface and a second surface that are vertically distributed. A first sealing groove (13) is constructed on the inner surface, the first surface and the second surface. A first sealing ring (14) is snapped into the first sealing groove (13).

3. The liquid pipeline connector according to claim 1, characterized in that, The connector tube (2) is provided with a second sealing groove (15), and a second sealing ring (16) is snapped into the second sealing groove (15). The free end of the sealing ring (12) and the second sealing ring (16) abut and overlap.

4. The liquid pipeline connector according to claim 1, characterized in that, The outer surface of the screw barrel (10) is provided with multiple fixing blocks (17).

5. The liquid pipeline connector according to claim 1, characterized in that, The locking component includes an outer ring (18) movably sleeved on the outer tube (4), a compression spring (19) is provided between the outer ring (18) and the outer tube (4), the outer ring (18) has a first annular surface (20) and a second annular surface (21) connected together, the outer tube (4) is constructed with a plurality of receiving cavities (22), a retaining bead (23) is movably disposed in the receiving cavity (22), the outer surface of the screw barrel (10) is constructed with a locking groove (24), the retaining bead (23) and the screw barrel (10), the first annular surface (20) and the second annular surface (21) are all rolled and overlapped, and the retaining bead (23) and the locking groove (24) are engaged.

6. The liquid pipeline connector according to claim 5, characterized in that, The screw cylinder (10) is provided with a guide cone surface, and a transition cone surface is provided at the junction of the first annular surface (20) and the second annular surface (21).

7. The liquid pipeline connector according to claim 5, characterized in that, The receiving cavity (22) includes a connected cylindrical groove and a conical groove, and the diameter of the retaining bead (23) corresponds to the diameter of the cylindrical groove.

8. The liquid pipeline connector according to claim 5, characterized in that, The locking groove (24) includes an annular segment and two symmetrically distributed conical segments.

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