Flaring connector for ultrapure PFA pipeline

Abstract

The utility model discloses a flaring connector for an ultra-pure PFA pipeline, and belongs to the technical field of pipeline connectors. The joint solves the problem that the existing threaded connection is easy to loosen, especially the condition of poor stability in a high-temperature, high-pressure or corrosive environment. According to the technical scheme, the connector comprises a connector body and a plug fixed at the side end, a PFA pipe body sleeves the surface of the plug after being heated and is in contact with the connector body, a threaded ring is fixed on the surface of the plug, and a fixing nut sleeves the surface of the PFA pipe body and is in threaded connection with the threaded ring. The positioning assembly is arranged between the fixing nut and the threaded ring and used for locking the fixing nut. The positioning assembly comprises an annular groove, a sliding extrusion block, a sliding lantern ring, a clamping ball in a sliding groove and a clamping groove in a threaded ring. During operation, the sliding lantern ring is pulled to relieve extrusion, the fixing nut is tightened and then loosened, the spring pushes the extrusion block to enable the clamping ball to be clamped into the clamping groove, and rotation is prevented. Comprising a clamping structure of a clamping ball and a sliding lantern ring resetting mechanism. The connector is mainly used for ultrapure PFA pipeline connection, can prevent looseness and is easy and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting technology, and in particular to a flared connection fitting for ultrapure PFA pipelines. Background Technology

[0002] In ultrapure piping systems, PFA tubing is widely used due to its resistance to chemical corrosion, high-temperature stability, and low permeability. Connections are typically made using threads. However, threaded connections may loosen over time, leading to weakened connections. In high-temperature, high-pressure, or highly corrosive environments, the stability of the connections is even more difficult to guarantee, affecting system reliability. Utility Model Content

[0003] The purpose of this invention is to solve the problem that existing threaded connections may loosen after prolonged use, resulting in an unstable connection, especially under high temperature, high pressure or strong corrosive environments, where the stability of the connection is even more difficult to guarantee. Therefore, this invention proposes a flared connector for ultrapure PFA pipelines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A flared connector for ultrapure PFA pipeline includes a connector body. A plug for inserting into a PFA tube is fixed to the side end of the connector body. After heating, the PFA tube is fitted onto the surface of the plug, and the PFA tube and the side end of the connector body are in contact. A threaded ring is fixed to the surface of the plug, and a fixing nut that is threadedly connected to the threaded ring is fitted onto the surface of the PFA tube.

[0006] Furthermore, to prevent loosening between the fixing nut and the threaded ring, a positioning component is provided between the fixing nut and the threaded ring. The positioning component is used to lock the fixing nut after the fixing nut and the connector body are connected.

[0007] In one possible design, the positioning component includes an annular groove formed on the surface of a fixed nut, a pressing block sliding within the annular groove, a sliding collar fixed to the surface of the pressing block, the sliding collar slidably sleeved on the surface of the fixed nut, at least four sliding grooves formed within the fixed nut, all four sliding grooves communicating with the annular groove, ball bearings sliding within each of the four sliding grooves, a groove formed on the surface of a threaded ring engaging with the four ball bearings, a spring sleeved on the surface of the fixed nut, the spring located within the annular groove, and both ends of the spring abutting against the side end of the pressing block and the inner wall of the annular groove respectively via spring seats;

[0008] The process involves inserting the plug into the PFA tube, pulling the sliding collar to release the pressure on the four retaining balls, and then turning the fixing nut to allow it to move along the threaded ring. At this point, the four retaining balls, no longer compressed, are pushed away by the threaded ring. When the fixing nut reaches the side of the connector, the sliding collar is released, and the spring's elasticity pushes the sliding collar and pressure block back to their original positions. The pressure block then re-presses the four retaining balls, causing them to slide within the groove and engage with it. Because the retaining balls are locked in the groove, the fixing nut cannot rotate, ensuring the stability of the connection between the fixing nut and the threaded ring.

[0009] In one possible design, the end of the compression block away from the spring is inclined, and the inclined surface of the compression block makes compression contact with the four retaining balls.

[0010] In one possible design, an anti-slip ring is fixed to the surface of the sliding collar, the anti-slip ring being used to facilitate pulling the sliding collar.

[0011] In one possible design, a limiting ring is fixed to the surface of the fixing nut. The limiting ring is used to limit the movement of the sliding collar to prevent the ball from completely disengaging from the groove.

[0012] In one possible design, the four retaining balls and slots match when the side end of the retaining nut is pressed into contact with the connector body.

[0013] In this application, after the PFA tube body is heated, it is fitted onto the surface of the plug. After the plug is inserted into the PFA tube body, the sliding collar is pulled, causing the sliding collar to drive the compression block to release the compression of the four retaining balls. The fixing nut is then turned, causing the fixing nut to move in a threaded motion on the surface of the threaded ring. At this time, the four retaining balls are no longer compressed and are pushed away from each other by the threaded ring. When the fixing nut reaches the side end of the connector body, the sliding collar is released, and the elasticity of the spring pushes the sliding collar and the compression block to reset. The compression block then compresses the four retaining balls again, causing them to slide in the groove and engage with the retaining balls in the groove. Since the retaining balls are stuck in the groove, the fixing nut cannot be rotated, ensuring the stability of the connection between the fixing nut and the threaded ring.

[0014] Beneficial effects: In this utility model, the flared connector for ultrapure PFA pipelines, through the design of the positioning component, can lock the fixing nut after the fixing nut and connector body are connected, preventing loosening between the fixing nut and the threaded ring. This anti-loosening design improves the stability of the connection and ensures the reliable operation of the ultrapure pipeline system in high temperature, high pressure, or highly corrosive environments;

[0015] In this invention, a flared connector for ultrapure PFA pipelines is described. The operation of this device is simple and straightforward; simply pulling the sliding collar, tightening the fixing nut, and loosening the sliding collar completes the connection and locking operations. This simplified operation reduces operational difficulty and improves work efficiency.

[0016] This invention relates to a device suitable for connecting ultrapure PFA pipelines of various specifications, exhibiting wide applicability. Whether in semiconductor manufacturing, pharmaceuticals, or food processing, this device can achieve rapid and stable connection of PFA pipelines. Attached Figure Description

[0017] Figure 1 This is a front perspective view of a flared connector for ultrapure PFA pipelines proposed in this utility model.

[0018] Figure 2 This is a partial exploded view of a flared connector for ultrapure PFA pipelines proposed in this utility model.

[0019] Figure 3 This is a cross-sectional view of a flared connector for ultrapure PFA pipelines proposed in this utility model.

[0020] In the diagram: 1. PFA tube body; 2. Fixing nut; 3. Connector body; 4. Plug; 5. Threaded ring; 6. Slot; 7. Anti-slip ring; 8. Limiting ring; 9. Ball retainer; 10. Annular groove; 11. Sliding collar; 12. Extrusion block; 13. Spring; 14. Slide groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1: Refer to Figures 1-3 A connector includes a connector body 3, with a plug 4 fixed to its side end. The plug 4 is used to insert into a PFA tube body 1. A threaded ring 5 is fixed to the surface of the plug 4. After heating, the PFA tube body 1 is fitted onto the surface of the plug 4, and the side end of the PFA tube body 1 contacts the side end of the connector body 3. A fixing nut 2 is fitted onto the surface of the PFA tube body 1, and the fixing nut 2 is threadedly connected to the threaded ring 5 to fix the connector body 3 onto the PFA tube body 1.

[0023] The positioning component is used to lock the fixing nut 2 after the fixing nut 2 and the connector body 3 are connected, preventing loosening between the fixing nut 2 and the threaded ring 5. The positioning component includes an annular groove 10 formed on the surface of the fixing nut 2, a pressing block 12 sliding within the annular groove 10, and a sliding collar 11 fixed to the surface of the pressing block 12, which slidably fits onto the surface of the fixing nut 2. The fixing nut 2 has four sliding grooves 14, all of which are connected to the annular groove 10. Each of the four sliding grooves 14 has a ball 9 sliding within it. The ball 9 can be spherical, elliptical, or cylindrical to suit different installation requirements. The surface of the threaded ring 5 has grooves 6 that engage with the four balls 9. The two ends of the spring 13 abut against the side ends of the pressing block 12 and the inner wall of the annular groove 10 via spring seats. The spring constant of the spring 13 is between 10 and 50 Newtons per meter, and its length varies from 5 mm to 20 mm.

[0024] During operation, after inserting the plug 4 into the PFA tube body 1, pull the sliding collar 11, causing the sliding collar 11 to drive the compression block 12 to slide within the annular groove 10, releasing the compression of the four retaining balls 9. At this time, tighten the fixing nut 2, causing the fixing nut 2 to move in a threaded motion on the surface of the threaded ring 5. After the four retaining balls 9 are released from compression, they are pushed by the threaded ring 5 in a direction away from each other. When the fixing nut 2 reaches the side end of the connector body 3, release the sliding collar 11. The elasticity of the spring 13 pushes the sliding collar 11 and the compression block 12 back to their original positions. The compression block 12 then re-compresses the four retaining balls 9 to slide within the sliding groove 14, driving the four retaining balls 9 to engage with the retaining groove 6. Since the retaining balls 9 are engaged in the retaining groove 6, they cannot rotate the fixing nut 2, thus ensuring the stability of the connection between the fixing nut 2 and the threaded ring 5.

[0025] The end of the compression block 12 furthest from the spring 13 is inclined, and the inclined surface of the compression block 12 makes compression contact with the four retaining balls 9. This design allows the compression block 12 to compress or release the retaining balls 9 more smoothly during sliding, improving the ease of operation;

[0026] An anti-slip ring 7 is fixed to the surface of the sliding collar 11. The anti-slip ring 7 is used to facilitate pulling the sliding collar 11. The design of the anti-slip ring 7 increases the friction between the operator's hand and the sliding collar 11, making it easier and more stable to pull the sliding collar 11.

[0027] A limiting ring 8 is fixed to the surface of the fixing nut 2. The limiting ring 8 is used to limit the movement of the sliding collar 11 and prevent the ball 9 from completely disengaging from the slide groove 14. The design of the limiting ring 8 ensures that the sliding collar 11 will not exceed the safe range during movement, thereby ensuring that the ball 9 always slides within the slide groove 14 and improving the reliability of the device.

[0028] Example 2: Reference Figures 1-3An improvement upon Example 1: A flared connector for ultrapure PFA pipelines, applied in the field of pipe fitting technology, where four retaining balls 9 and retaining grooves 6 match when the side end of the fixing nut 2 is pressed into contact with the connector body 3. This matching design ensures that when the fixing nut 2 is tightened to the side end of the connector body 3, the retaining balls 9 can accurately engage with the retaining grooves 6, achieving the locking function of the fixing nut 2.

[0029] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A flared connector for ultrapure PFA piping, used to quickly and stably fix the flared connector onto a PFA pipe body (1), characterized in that, include: Connector body (3), the side end of the connector body (3) is fixed with a plug (4) for inserting into the PFA tube body (1), the PFA tube body (1) is heated and fitted onto the surface of the plug (4), and the PFA tube body (1) and the side end of the connector body (3) are in contact, the surface of the plug (4) is fixed with a threaded ring (5), and the surface of the PFA tube body (1) is fitted with a fixing nut (2) that is threadedly connected to the threaded ring (5); Furthermore, in order to prevent loosening between the fixing nut (2) and the threaded ring (5), a set of positioning components is provided between the fixing nut (2) and the threaded ring (5). The positioning components are used to lock the fixing nut (2) after the fixing nut (2) and the connector body (3) are connected.

2. The flared connector for ultrapure PFA pipelines according to claim 1, characterized in that, The positioning component includes an annular groove (10) on the surface of the fixed nut (2), a pressing block (12) slides in the annular groove (10), a sliding collar (11) is fixed on the surface of the pressing block (12), the sliding collar (11) slides on the surface of the fixed nut (2), at least four sliding grooves (14) are opened in the fixed nut (2), all four sliding grooves (14) are connected to the annular groove (10), and a ball (9) slides in each of the four sliding grooves (14). The surface of the threaded ring (5) is provided with a groove (6) that engages with the four balls (9). A spring (13) is sleeved on the surface of the fixed nut (2), the spring (13) is located in the annular groove (10), and the two ends of the spring (13) abut against the side end of the pressing block (12) and the inner wall of the annular groove (10) through spring seats respectively. When the plug (4) is inserted into the PFA tube body (1), the sliding collar (11) is pulled, so that the sliding collar (11) drives the compression block (12) to release the compression of the four ball (9). The fixing nut (2) is turned, so that the fixing nut (2) moves in the threaded ring (5) on the surface. At this time, the four ball (9) loses the compression and is pushed by the threaded ring (5) in a direction away from each other. When the fixing nut (2) reaches the side end of the connector body (3), the sliding collar (11) is released. The elasticity of the spring (13) pushes the sliding collar (11) and the compression block (12) to reset. The compression block (12) re-compresses the four ball (9) to slide in the groove (14) and drives the four ball (9) to engage in the slot (6). At this time, since the ball (9) is stuck in the slot (6), it cannot rotate the fixing nut (2), thus ensuring the stability of the connection between the fixing nut (2) and the threaded ring (5).

3. The flared connector for ultrapure PFA pipelines according to claim 2, characterized in that, The end of the extrusion block (12) away from the spring (13) is inclined, and the inclined surface of the extrusion block (12) is in extrusion contact with the four ball bearings (9).

4. The flared connector for ultrapure PFA pipelines according to claim 2, characterized in that, The surface of the sliding collar (11) is fixed with an anti-slip ring (7), which is used to facilitate pulling the sliding collar (11).

5. A flared connector for ultrapure PFA pipelines according to claim 2, characterized in that, A limiting ring (8) is fixed to the surface of the fixing nut (2). The limiting ring (8) is used to limit the movement of the sliding collar (11) to prevent the ball (9) from completely disengaging from the groove (14).

6. The flared connector for ultrapure PFA pipelines according to claim 2, characterized in that, When the side end of the fixing nut (2) is pressed into contact with the connector body (3), the four retaining balls (9) and the retaining groove (6) match.

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