A pipe connection device that is easy to operate

Abstract

This utility model belongs to the field of pipeline technology, specifically relating to an easy-to-operate pipeline connection device, including a locking nut, a housing body, and a sleeve. The sleeve is disposed inside the housing body, and the locking nut fastens the housing body and the sleeve. A clamping ring is installed on the sleeve, and a first sealing ring and a second sealing ring are provided inside the sleeve. The advantage of this utility model is that the protruding annular structure at the outer end of the sleeve cooperates with the pipeline groove of the locking nut, which can fix the position of the sleeve when tightening, ensure the fitting accuracy of the clamping ring and the inclined surface of the sleeve, and ensure the stable and effective locking mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline technology, specifically relating to a pipeline connection device that is easy to operate. Background Technology

[0002] In traditional pipe connection methods, threaded connections rely on auxiliary materials such as PTFE tape and sealant for sealing, which is not only cumbersome to operate but also prone to leakage due to aging of the sealing materials after long-term use. While flange connections offer better sealing performance, they require multiple components such as bolts and gaskets. Installation necessitates precise alignment of bolt holes and even tightening, which is time-consuming and labor-intensive, especially in confined spaces. For non-metallic pipes such as plastic pipes, commonly used snap-fit ​​or socket-type connections generally suffer from insufficient locking reliability. When the pipe is subjected to axial tensile force or vibration, the connection is prone to loosening, even leading to pipe detachment and fluid leakage. While some devices improve stability by adding locking structures, this often sacrifices ease of operation, requiring specialized tools for unlocking, which greatly inconveniences later maintenance.

[0003] In terms of sealing performance, existing devices mostly adopt a single sealing ring design, and the sealing ring is prone to failure due to misalignment during installation or deformation under long-term pressure, especially in high-pressure fluid or corrosive media environments, where the risk of seal failure is even higher. At the same time, most connection devices have poor versatility; a single specification of device can only be adapted to pipes of a specific diameter, making it difficult to meet the needs of multiple pipe diameters and multiple media transmission in complex pipeline systems, thus increasing equipment procurement and inventory management costs.

[0004] Furthermore, some connection devices suffer from unreasonable component designs. For example, the locking parts have poor compatibility with the pipe material, easily leading to damage to the pipe surface; or the sealing materials lack sufficient temperature and corrosion resistance, limiting the device's application under extreme working conditions. Therefore, developing a pipe connection device that combines ease of operation, reliable locking, stable sealing, and wide compatibility is key to solving the pain points of existing technologies. Utility Model Content

[0005] In view of the above-mentioned shortcomings in the prior art, the present invention provides an easy-to-operate pipeline connection device to solve the problems that the connection part is prone to loosening when the pipeline is subjected to axial tensile force or vibration, which may even lead to the pipe falling off and causing fluid leakage accidents.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An easy-to-operate pipe connection device includes a locking nut, a housing body, and a sleeve. The sleeve is disposed inside the housing body. The locking nut fastens the housing body and the sleeve. A clamping ring is installed on the sleeve. A first sealing ring and a second sealing ring are provided inside the sleeve.

[0008] Furthermore, the outer ring of the sleeve is provided with a groove for fitting the second sealing ring.

[0009] Furthermore, an isolation ring is provided between two adjacent sets of the first sealing rings.

[0010] Furthermore, one end of the locking ring is provided with an opening.

[0011] Furthermore, the housing body has a stud in the middle and threads at both ends.

[0012] Furthermore, the outer end of the sleeve is provided with a protruding annular structure.

[0013] Furthermore, the top of the locking nut is provided with a pipe groove.

[0014] Furthermore, the first and second sealing rings are made of nylon 66 or nylon 12 material.

[0015] At the factory, the locking nut is already tightened to the housing body. At this time, the sleeve is fixed in the housing body by the locking nut. The clamping ring, the first sealing ring, the second sealing ring and other components are all in a "pre-installed" state to ensure that the components will not loosen or shift during transportation.

[0016] During installation, the operator inserts the plastic pipe to be connected into the pipe groove of the locking nut until it is fully inserted into the sleeve.

[0017] During insertion, the sharp edge of the metal clamping ring will initially embed into the outer wall of the plastic tube, forming a preliminary fixation; at the same time, the first and second sealing rings are squeezed by the insertion of the tube and adhere tightly to the outer wall of the tube, thus beginning to perform a sealing function.

[0018] When the pipe is subjected to an outward pulling force, the tapered inclined surface of the inner wall of the sleeve moves relative to the tapered inclined surface of the clamping ring, and the sleeve exerts an inward pressure on the clamping ring.

[0019] Because the clamping ring has an opening, it will contract inward under pressure, and its sharp edge will further embed into the outer wall of the plastic pipe.

[0020] The greater the pulling force, the more obvious the shrinkage of the clamping ring, and the deeper the sharp edge is embedded. Ultimately, the pipe is absolutely locked through "mechanical interlocking" to prevent it from falling off.

[0021] When it is necessary to disassemble the pipe, loosen the lock nut to separate it from the housing body by a certain distance. The sleeve is no longer fixed by the lock nut, and the pressure on the clamping ring is released.

[0022] The locking ring loosens due to its own elasticity, and the sharp edge detaches from the outer wall of the plastic pipe, allowing the pipe to be directly pulled out from the sleeve, thus completing the unlocking process.

[0023] Compared with the prior art, this utility model has the following advantages:

[0024] Simply insert the pipe into place; no additional tools are needed. Initial locking can be achieved through the mechanical cooperation between the clamping ring and the sleeve. Subsequent fixing can be completed by tightening the locking nut. The operation process is simple.

[0025] The unlocking process is flexible and quick: to unlock, simply loosen the locking nut, the pressure of the sleeve on the clamping ring is released, the clamping ring elastically resets, and the pipe can be directly removed, avoiding the problem of "difficult disassembly" in traditional connection devices. Attached Figure Description

[0026] Figure 1 This is an exploded view of an embodiment of the easy-to-operate pipe connection device of this utility model. Figure 1 ;

[0027] Figure 2 This is an exploded view of an embodiment of the easy-to-operate pipe connection device of this utility model. Figure 2 ;

[0028] Figure 3 This is a cross-sectional structural schematic diagram of an embodiment of a pipe connection device that is easy to operate according to the present invention;

[0029] The reference numerals in the accompanying drawings include: locking nut 1, pipe groove 10, housing body 2, sleeve 3, groove 31, clamping ring 4, opening 41, isolation ring 5, first sealing ring 6, and second sealing ring 7. Detailed Implementation

[0030] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments:

[0031] It should be noted that the same or similar reference numerals in the accompanying drawings of the embodiments of this utility model correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0034] Example

[0035] like Figure 1-3 As shown, an easy-to-operate pipe connection device includes a locking nut 1, a housing body 2, and a sleeve 3. The sleeve 3 is located inside the housing body 2. The locking nut 1 fastens the housing body 2 and the sleeve 3. A clamping ring 4 is installed on the sleeve 3. A first sealing ring 6 and a second sealing ring 7 are provided inside the sleeve 3.

[0036] The outer ring of the sleeve 3 is provided with a groove 31 for fitting the second sealing ring 7. A set of isolation rings 5 ​​is provided between two adjacent sets of first sealing rings 6. One end of the clamping ring 4 is provided with an opening 41. The middle of the housing body 2 is a stud, and both ends of the housing body 2 are provided with threads. The outer end of the sleeve 3 is provided with a protruding annular knot. The top of the locking nut 1 is provided with a pipe groove 10.

[0037] The first sealing ring 6 and the second sealing ring 7 are made of nylon 66 or nylon 12. When leaving the factory, the locking nut 1 is already tightened to the housing body 2. At this time, the sleeve 3 is fixed in the housing body by the locking nut. The clamping ring 4, the first sealing ring 6, the second sealing ring 7 and other components are all in a "pre-installed" state to ensure that the components will not loosen or shift during transportation.

[0038] During installation, the operator inserts the plastic pipe to be connected into the pipe groove 10 of the locking nut until it is fully inserted into the sleeve 3 and the end of the pipe contacts the limiting structure inside the sleeve.

[0039] During insertion, the sharp edge of the metal clamping ring 4 will initially embed into the outer wall of the plastic tube, forming a preliminary fixation; at the same time, the first sealing ring 6 and the second sealing ring 7 are squeezed by the insertion of the tube and closely adhere to the outer wall of the tube, thus beginning to perform a sealing function.

[0040] When the pipe is subjected to an outward pulling force, the tapered inclined surface of the inner wall of the sleeve 3 and the tapered inclined surface of the clamping ring 4 move relative to each other, and the sleeve exerts an inward pressure on the clamping ring.

[0041] Because the clamping ring has an opening 41, it will shrink inward under pressure, and its sharp edge will further embed into the outer wall of the plastic pipe. The metal is harder than the plastic, so the clamping ring will not be damaged due to embedding.

[0042] The greater the pulling force, the more obvious the shrinkage of the clamping ring, and the deeper the sharp edge is embedded. Ultimately, the pipe is absolutely locked through "mechanical interlocking" to prevent it from falling off.

[0043] When it is necessary to disassemble the pipe, loosen the locking nut 1 to separate it from the housing body 2 by a certain distance. The sleeve 3 is no longer fixed by the locking nut, and the pressure on the clamping ring 4 is released.

[0044] The locking ring releases due to its own elastic opening structure, and the sharp edge detaches from the outer wall of the plastic pipe, allowing the pipe to be directly pulled out from the sleeve, thus completing the unlocking process.

[0045] This structure is highly convenient to operate, with efficient installation and unlocking. Installation requires no complicated tools; simply insert the pipe into place. No additional tools are needed, and initial locking can be achieved through the mechanical cooperation between the clamping ring and the sleeve. Subsequent fixing is completed by tightening the locking nut. The operation process is simple.

[0046] To unlock, simply loosen the locking nut, the pressure of the sleeve on the clamping ring is released, the clamping ring elastically resets, and the pipe can be directly removed, avoiding the problem of "difficult disassembly" in traditional connection devices.

[0047] The sleeve is equipped with a first sealing ring 6 and a second sealing ring 7, forming a "double barrier" to effectively prevent fluid leakage; the second sealing ring is fixed by the groove 31 on the outer ring of the sleeve to prevent the seal from shifting during installation or use and to ensure sealing stability.

[0048] An isolation ring 5 is provided between adjacent first sealing rings to prevent the sealing rings from being squeezed and deformed, ensuring that each sealing ring can fit evenly against the outer wall of the pipe, thus improving sealing reliability, especially suitable for high-pressure fluid scenarios.

[0049] The sealing ring is made of nylon 66 or nylon 12, which are resistant to chemical corrosion, high temperature (-40℃ to 120℃), and wear, and can be used with various fluid media such as water, oil, and gas.

[0050] The clamping ring 4 is made of metal and has an opening 41 at one end, which has a certain elastic deformation capacity. When the pipe is pulled outward, the conical inclined surface of the inner wall of the sleeve 3 abuts against the conical inclined surface of the clamping ring, forcing the clamping ring to contract inward due to the opening structure. Its sharp edge will further embed into the outer wall of the plastic pipe, forming a self-tightening effect of "the greater the pulling force, the stronger the locking force", which completely prevents the pipe from falling off.

[0051] The protruding annular structure at the outer end of the sleeve cooperates with the pipe groove 10 of the locking nut 1, which can fix the position of the sleeve when tightened, ensure the fitting accuracy between the clamping ring and the inclined surface of the sleeve, and ensure the stable effectiveness of the locking mechanism.

[0052] The housing body 2 has a stud in the middle and threads at both ends, which can directly connect two pipes or connect with other equipment such as valves and pumps through the threads, adapting to different installation environments.

[0053] The locking nuts, sleeves, and clamping rings of each component are modularly designed, which facilitates mass production and replacement, and reduces maintenance costs.

[0054] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all general technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A pipe connection device that is easy to operate, characterized in that: It includes a locking nut (1), a housing body (2) and a sleeve (3). The sleeve (3) is located inside the housing body (2). The locking nut (1) fastens the housing body (2) and the sleeve (3). A clamping ring (4) is installed on the sleeve (3). A first sealing ring (6) and a second sealing ring (7) are provided inside the sleeve (3).

2. The easy-to-operate pipe connection device according to claim 1, characterized in that: The outer ring of the sleeve (3) is provided with a groove (31) for fitting the second sealing ring (7).

3. The easy-to-operate pipe connection device according to claim 1, characterized in that: An isolation ring (5) is provided between two adjacent sets of the first sealing rings (6).

4. The easy-to-operate pipe connection device according to claim 1, characterized in that: The locking ring (4) has an opening (41) at one end.

5. The easy-to-operate pipe connection device according to claim 1, characterized in that: The housing body (2) has a stud in the middle and threads at both ends.

6. The easy-to-operate pipe connection device according to claim 1, characterized in that: The outer end of the sleeve (3) is provided with a protruding annular structure.

7. The easy-to-operate pipe connection device according to claim 1, characterized in that: The top of the locking nut (1) is provided with a pipe groove (10).

Images