Sealing guide pipe connector made of resin

Abstract

Disclosed is a sealing guide pipe connector made of resin, the sealing guide pipe connector comprising a connector body (1), an inner ring (2) and a nut (3), wherein the inner ring (2) is provided with an insertion head portion (21); the connector body (1) is provided with an insertion slot portion (10); the insertion head portion (21) is inserted into the insertion slot portion (10) to form a sealed connection; the nut (3) is connected to the connector body (1) so as to maintain the inserted state between the insertion head portion (21) and the insertion slot portion (10); and the nut (3) presses against the inner ring (2). In a free state, the thickness of the insertion head portion (21) linearly varies in the axial direction of the inner ring (2), and in the inserted state, the insertion slot portion (10) elastically deforms, and the thickness variation rate of the insertion slot portion (10) is less than that of the insertion head portion (21) in the free state; therefore, the sealing effect between the insertion head portion (21) and the insertion slot portion (10) is ensured, and the frictional resistance that has to be overcome when the insertion head portion (21) fits with the insertion slot portion (10) is also reduced; moreover, the sealing reliability and durability are ensured.

Description

Resin sealing conduit joint TECHNICAL FIELD

[0001] The present application relates to a resin sealing conduit joint. BACKGROUND

[0002] It is known to have a resin pipe joint used in manufacturing devices in technical fields such as semiconductor manufacturing, medical / pharmaceutical manufacturing, food processing, and chemical industry. Such a resin pipe joint is used to connect a pipe for flowing a fluid such as ultrapure water or a medicinal liquid to another pipe or a fluid device, and can be engaged with the pipe.

[0003] US5743572A and CN109642694B both disclose the structure of the joint, which is mainly composed of a joint body, an inner ring and a nut, as shown in FIG. 1, the joint body a forms a groove b, the inner ring c forms an insertion part d, the insertion part d is inserted into the groove b, the groove width D1 of the groove b is constant along the insertion direction, the wall thickness T0 of the insertion part d is constant along the insertion direction, and T0>D1.

[0004] We found that this structure has many shortcomings in use, 1. The insertion part and the groove part are horizontally inserted, the insertion resistance is large, when inserting, the frictional resistance required to be overcome by the limiting surface of the inner ring is large, which leads to the need to press the inner ring insertion part with strong force, and the contact surface is easy to be damaged during the relative motion of assembly and disassembly, which shortens the service life, and it is very laborious to assemble and disassemble. The insertion part is worn during the relative motion of assembly and disassembly, the more the number of insertion and removal, the more the wear, the compression rate of the inner ring will also be reduced accordingly when assembling next time, and the sealing reliability will be reduced, and the large frictional resistance leads to large tightening torque of the nut, which is laborious to tighten by hand. 2. After years of use in this state, the inner ring pressed in with strong force needs to be pulled from the direction of separation of the joint body to disassemble the conduit from the joint, which is easy to cause the conduit to separate from the inner ring, but the inner ring still remains in the joint body due to the large frictional resistance. If this happens, the inner ring still connected to the joint body needs to be pulled out by pliers when the disassembled conduit is re-engaged with the joint, as a result, not only the inner ring may be damaged, but also the tightness between the inner ring and the conduit may be weakened when they are re-engaged, thereby reducing the sealing between them. In fact, it is difficult to realize the re-engagement of the conduit and the joint.

[0005] SUMMARY

[0006] The present application aims to disclose a resin sealing conduit joint, I, the plug-in part is provided with an inclined angle θ, and θ is greater than the elastic deformation angle α of the slot part during plugging, which not only ensures the sealing effect between the plug-in part and the slot part, but also positions the plug-in part in the slot part, reduces the friction resistance required to be overcome by the inner ring limiting surface when the plug-in part and the slot part are combined, and gradually changes the friction resistance from small to large, so that the contact surface is not easily damaged, the service life of the joint body and the inner ring is prolonged, the overall friction resistance of the plug-in part and the slot part is small, and only a small torque needs to be applied to tighten the nut; II, since the cross section of the inner ring plug-in part is conical, the maximum compression amount is at the front end of the plug-in part, and the minimum compression amount is at the rear end of the plug-in part, so that when disassembling, the plug-in part with the maximum compression amount at the rear end is separated from the slot part first, thereby, under the condition of maintaining the connection between the inner ring and the conduit, the inner ring can be separated from the joint body by using a relatively small force, the damage to the inner ring during each assembly and disassembly process is reduced, the service life of the inner ring during multiple assembly and disassembly is improved, and each assembly and disassembly is relatively labor-saving, so that the conduit and the joint can be reconnected more labor-savingly, reliably and easily, and the compression rate of the inner ring will not be reduced during reconnection, so that the reliability and durability of the sealing can be ensured.

[0007] To achieve the above-mentioned purpose, the present application provides a resin sealing conduit joint, which comprises a joint body, an inner ring and a nut; the inner ring is formed with a plug-in part, the joint body is formed with a slot part, the plug-in part is plugged into the slot part to form a sealed connection, the nut is connected with the joint body to maintain the plugging state of the plug-in part and the slot part, and the nut is in a pressing state with the inner ring; in a free state, the thickness of the plug-in part linearly changes along the axial direction of the inner ring, in a plugging state, the slot part elastically deforms, and the diameter change rate of the slot part is less than that of the plug-in part in the free state.

[0008] In some embodiments, in the free state, the inner circumferential surface of the plug-in part and the axis of the inner ring form an angle θ, in the plugging state, the outer circumferential surface of the slot part and the axis of the inner ring form an angle α, and the angle θ is greater than the angle α.

[0009] In some embodiments, 0<θ<15°.

[0010] In some embodiments, T2>T1≥D, D is the width of the slot part, T1 is the thickness of the front end of the plug-in part, and T2 is the thickness of the rear end of the plug-in part.

[0011] In some embodiments, in the plugging state, the compression rate of the plug-in part gradually decreases along the insertion direction, the compression rate of the front end of the plug-in part is greater than or equal to 0, and the compression rate of the rear end of the plug-in part is less than or equal to 40%.

[0012] In some embodiments, the plug portion and the inner ring axis form an angle in the free state.

[0013] In some embodiments, the joint body comprises a barrel portion, one side of which is formed with an outer barrel portion and an inner barrel portion extending outward in the axial direction, the extension length of the outer barrel portion being greater than that of the inner barrel portion, and the insertion groove portion being formed by the barrel portion, the outer barrel portion and the inner barrel portion.

[0014] In some embodiments, a conduit is further included, the inner ring being inserted into the conduit, and a protruding portion being provided on the inner ring to expand the diameter of the inlet of the conduit to form a sealed connection.

[0015] In some embodiments, the conduit extends between the joint body and the inner ring, the nut is sleeved on the conduit and is screwed with the joint body, and the nut and the protruding portion of the inner ring tightly clamp the conduit to form a sealed connection.

[0016] In some embodiments, the joint body and the inner ring are made of resin material.

[0017] Compared with the prior art, the beneficial effects of the present application are: 1. The plug portion is provided with an inclined angle θ, and θ is greater than the angle α at which the insertion groove portion elastically deforms during insertion, which not only ensures the sealing effect between the plug portion and the insertion groove portion, but also reduces the frictional resistance required to be overcome by the limiting surface of the inner ring when the plug portion and the insertion groove portion are combined, the frictional resistance gradually changes from small to large, the contact surface is not easily damaged, the service life of the joint body and the inner ring is prolonged, the overall frictional resistance of the plug portion and the insertion groove portion is small, and only a small torque needs to be applied to tighten the nut.

[0018] 2. Since the cross section of the plug portion of the inner ring is conical, the maximum compression occurs at the rear end of the plug portion during insertion, and the maximum compression occurs at the front end of the plug portion during insertion, the maximum compression occurs at the rear end of the plug portion during disassembly, and the maximum compression occurs at the rear end of the plug portion during disassembly, thereby, in the state of maintaining the connection between the inner ring and the conduit, the inner ring can be separated from the joint body with relatively small force, the damage to the inner ring during each assembly and disassembly process is reduced, the service life of the inner ring during multiple assembly and disassembly is improved, and each assembly and disassembly is relatively labor-saving, the conduit and the joint can be more labor-saving, reliable and easily reconnected, and the compression rate of the inner ring will not decrease during reconnection, which can ensure the reliability and durability of the seal. BRIEF DESCRIPTION OF DRAWINGS

[0019] FIG. 1 is a structural schematic view of a plug portion and an insertion groove portion in the prior art;

[0020] FIG. 2 is a structural schematic view of a resin sealing conduit joint according to the present application;

[0021] FIG. 3 is an enlarged view of reference A in FIG. 2;

[0022] Fig. 4 is a structural schematic diagram of the plug portion and the socket portion shown in Fig. 3;

[0023] Reference signs: joint body 1, inner ring 2, nut 3, conduit 4, plug portion 21, socket portion 10, first sealing position 51, second sealing position 52, third sealing position 53, inner peripheral surface 210, outer peripheral surface 212, outer peripheral surface 100, inner peripheral surface 101, compression portion 211, protrusion 22, barrel portion 11, outer barrel portion 12, inner barrel portion 13. DETAILED DESCRIPTION

[0024] The present application will be described in detail below with reference to the embodiments shown in the drawings, but it should be noted that these embodiments are not limiting of the present application, and equivalent transformations or substitutions of function, method, or structure made by those of ordinary skill in the art based on these embodiments are within the scope of the present application.

[0025] A resin sealing conduit joint as shown in Figs. 2-4 includes a joint body 1, an inner ring 2, and a nut 3. The joint body 1 and the inner ring 2 are made of resin material, and the joint body 1 and the inner ring 2 can be deformed.

[0026] The inner ring 2 is formed with a plug portion 21, and the joint body 1 is formed with a socket portion 10. The plug portion 21 is inserted into the socket portion 10 to form a sealing connection, which is a first sealing position 51.

[0027] In a free state, the thickness of the plug portion 21 linearly changes along the axial direction of the inner ring 2. In an inserted state, the socket portion 10 elastically deforms, and the rate of change in diameter of the socket portion 10 is less than the rate of change in diameter of the plug portion 21 in the free state. Specifically, in the present embodiment, in the free state, i.e., when the plug portion 21 and the socket portion 10 are not inserted, the inner peripheral surface 210 of the plug portion 21 forms an angle θ with the axis of the inner ring 2, where 0 < θ < 15°, and in the present embodiment, θ = 15°. The plug portion 21 is provided with an inclined angle θ, so that it is more easily positioned for insertion into the socket portion 10, and so that a face seal is formed when the plug portion 21 is inserted into the socket portion 10.

[0028] Because the plug portion 21 is provided with an inclined angle θ, the frictional resistance that needs to be overcome by the inner ring 2 when the plug portion and the socket portion are combined is reduced, the frictional resistance gradually changes from small to large, the contact surface is not easily damaged, the sealing effect between the joint body 1 and the inner ring 2 is more durable, and the service life of the joint body 1 and the inner ring 2 can be extended. In addition, only a small torque needs to be applied to tighten the nut, which saves time and effort.

[0029] In the plugged state, the plug portion 21 is compressed, as shown by the compressed portion 211 in FIG. 2, and the deeper the plug portion 21 is inserted, the greater the compression of the plug portion 21. At the same time, the slot portion 10 is elastically deformed, and the outer circumferential surface 100 of the slot portion 10 forms an angle a with the axis of the inner ring 2. The angle a is greater than the angle a, thereby ensuring the sealing effect of the plug portion 21 and the slot portion 10.

[0030] T2>T1≥D, D is the width of the slot portion 10, T1 is the thickness of the front end of the plug portion 21 before insertion, and T2 is the thickness of the rear end of the plug portion 21 after insertion. In the plugged state, the compression rate of the plug portion 21 decreases along the insertion direction, and the compression rate of the front end of the plug portion 21 is greater than or equal to 0, and the compression rate of the rear end of the plug portion 21 is less than or equal to 40%.

[0031] In the free state, the outer circumferential surface 212 of the plug portion 21 forms an angle with the axis of the inner ring 1, and the angle is greater than or equal to 0. In the plugged state, the outer circumferential surface 212 of the plug portion 21 is in contact with the inner circumferential surface 101 of the slot portion 10, and the outer circumferential surface 212 of the plug portion 21 is extruded, and the slot portion 10 is elastically deformed, and the inner circumferential surface 101 of the slot portion 10 forms an angle with the axis of the inner ring 2.

[0032] The front end of the plug portion 21 has the maximum stroke and the minimum compression, and the rear end of the plug portion 21 has the maximum compression and the minimum stroke. When disassembling, the rear end with the maximum compression is separated from the slot portion 10 first, thereby separating the inner ring 2 from the connector body 1 with relatively small force while maintaining the connection between the inner ring 2 and the conduit 4, reducing the damage to the inner ring 2 during each assembly and disassembly process, improving the service life of the inner ring 2 during multiple assembly and disassembly processes, and making each assembly and disassembly process relatively labor-saving, enabling more labor-saving, reliable and easy reconnection of the conduit 4 and the connector. When reconnected, since the inner ring 2 and the connector body 1 are not worn, the compression rate of the inner ring 2 does not decrease, thereby ensuring the sealing reliability and durability.

[0033] When disassembling, the inner ring 2 and the conduit 4 are not separated, and the conduit 4 is not deformed, thereby ensuring the sealing effect of the second sealing portion 52 and the third sealing portion 53 during reconnection. Therefore, whether during the initial connection of the resin sealing conduit connector and the conduit or during reconnection, the sealing between the connector body 1 and the inner ring 2 is good.

[0034] The connector body 1 comprises a barrel portion 11, one side of the barrel portion 11 is formed with an outer barrel portion 12 and an inner barrel portion 13 extending outward in the axial direction, and the inner barrel portion 13 and the outer barrel portion 12 are arranged inside and outside in the meridian direction. The extension length of the outer barrel portion 12 is greater than the extension length of the inner barrel portion 13, and the slot portion 10 is formed by the barrel portion 11, the outer barrel portion 12 and the inner barrel portion 13.

[0035] The inner ring 2 is inserted into a conduit 4, and the inner ring 2 is provided with a protrusion 22 that expands the diameter of the conduit 4 at the inlet to form a sealed connection, which is the second sealing part 52. The conduit 4 extends between the joint body 1 and the inner ring 2. The nut 3 and the protrusion 22 of the inner ring 2 tightly clamp the conduit 4 to form a sealed connection, which is the third sealing part 53.

[0036] The nut 3 is sleeved on the conduit 4 and is screwed with the joint body 1. Specifically, the nut 3 is fastened to the outer cylinder part 12 of the joint body 1 through an internal thread, and fastens the conduit 4 in the joint body 1 together with the inner ring 2. The nut 3 is connected with the joint body 1 to maintain the plug-in state of the plug part 21 and the slot part 10, and the nut 3 is in a pressing state with the inner ring 2.

[0037] Since the frictional resistance required to be overcome by the inner ring 2 is small when the plug part 21 and the slot part 10 are combined, the nut 3 only needs to exert a small torque to form a sealing part that exerts a proper surface pressure between the joint body 1 and the inner ring 2 that are connected with each other, and exerts a sealing force in the radial direction through the sealing part to tightly fit the plug part 21 and the slot part 10, thereby ensuring excellent sealing between the joint body 1 and the inner ring 2 and ensuring the sealing effect of the first sealing part 51.

[0038] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present application, and are not used to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

[0039] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and the person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that can be understood by the person skilled in the art.

Claims

1. A resin sealed conduit joint, characterized in that: The joint comprises a connector body, an inner ring, and a nut; the inner ring is formed with a plug portion, the connector body is formed with a slot portion, the plug portion is inserted into the slot portion to form a sealed connection, the nut is connected to the connector body to maintain the plug-in state of the plug portion and the slot portion, and the nut is in a pressing state against the inner ring; In the free state, the thickness of the plug portion changes linearly along the axial direction of the inner ring. In the plugged state, the slot portion undergoes elastic deformation, and the diameter change rate of the slot portion is smaller than the diameter change rate of the plug portion in the free state.

2. The resin sealed conduit joint according to claim 1, characterized in that: In the free state, the inner circumference of the plug portion and the inner ring axis form an angle θ. In the plugged state, the slot portion undergoes elastic deformation, and the outer circumference of the slot portion and the inner ring axis form an angle α, and the angle θ is greater than the angle α.

3. A resin sealed conduit joint according to claim 1 or 2, characterized in that: 0<θ<15°.

4. The resin sealed conduit joint according to claim 3, characterized in that: T2>T1≥D, D is the width of the slot, T1 is the thickness of the plug at the front end, and T2 is the thickness of the plug at the rear end.

5. The resin sealed conduit joint according to claim 4, characterized in that: In the plugged state, the compression rate of the plug portion decreases gradually along the insertion direction. The compression rate of the plug portion at the front end is greater than or equal to 0, and the compression rate of the plug portion at the rear end is less than or equal to 40%.

6. The resin sealed conduit joint according to claim 5, characterized in that: In the free state, the outer peripheral surface of the plug portion and the axis of the inner ring form a certain angle.

7. The resin sealed conduit joint according to claim 1, characterized in that: The joint body includes a cylindrical portion, one side of which is formed with an outer cylindrical portion and an inner cylindrical portion extending axially outward, the extension length of the outer cylindrical portion is greater than the extension length of the inner cylindrical portion, and the slot portion is formed by the cylindrical portion, the outer cylindrical portion and the inner cylindrical portion.

8. The resin sealed conduit joint according to claim 1, characterized in that: The device also includes a catheter, the inner ring is inserted into the catheter, and a protrusion is provided on the inner ring. The protrusion expands the diameter of the inlet of the catheter to form a sealed connection.

9. The resin sealed conduit joint according to claim 8, characterized in that: The conduit extends between the joint body and the inner ring. The nut is sleeved on the conduit and threadedly connected to the joint body. The nut and the protrusion of the inner ring tightly clamp the conduit to form a sealed connection.

10. The resin sealed conduit joint according to claim 1, characterized in that: The joint body and the inner ring are made of resin material.

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