Locking clamp

Abstract

The utility model belongs to the technical field of connecting piece, disclose a kind of anti-loose clamp, including clamp body, bolt, washer and nut.The both ends of clamp body can be mutually overlapped, to form the annular structure that can be set on pipeline.Bolt is set in one end of clamp body and passes through the other end.Washer can be elastically deformed, and washer is sleeved on bolt, and located the side of the other end of clamp body deviating from bolt.Nut can be screwed with bolt, so that the both ends of clamp body are connected into an organic whole, and washer is extruded to clamp body to make it occur deformation, to increase the friction between nut and bolt.The utility model is with the elastic pressure generated by washer deformation, the friction between thread is significantly improved, can effectively limit the relative rotation of nut and bolt, even if the vibration generated by equipment operation, nut is not easy to loosen, to ensure that clamp body always maintains enough tightening force to pipeline, guarantee the sealing performance of pipeline connection, reduce the occurrence of leakage problem.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to an anti-loosening clamp. Background Technology

[0002] In the field of pipeline connections, clamps are a commonly used connector, widely applied in pipeline connection scenarios for various equipment. Compared with traditional flange connections and welding methods, they have advantages such as simple connection operation, no need for special professional technical skills, and the ability of ordinary workers to operate them after simple training. They can effectively stabilize project quality and improve work efficiency, thus enjoying a high usage rate in the market.

[0003] Existing clamps typically consist of a body and a bolt. The two ends of the body can overlap to form a ring shape. The bolt passes through one end of the body and is screwed to the other end. Rotating the bolt causes the two ends of the body to move relative to each other, thus tightening the clamp and gripping the pipeline. Its tightening function relies on the threaded connection structure between the bolt and the body.

[0004] In practical applications, when clamps are used for equipment pipeline connections, the vibrations generated by the equipment operation will be transmitted to the threaded connection, which can easily lead to loosening of the thread fit. This reduces the clamp's tightening force on the pipeline, ultimately resulting in insufficient sealing performance at the pipeline connection and causing pipeline leakage problems.

[0005] Therefore, the above problems urgently need to be solved. Utility Model Content

[0006] The purpose of this utility model is to provide an anti-loosening clamp to maintain the clamp's tightening force on the pipeline, ensure the sealing performance of the pipeline connection, and reduce the occurrence of leakage problems.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A locking clamp for connecting pipes, the locking clamp comprising a clamp body, a bolt, a washer, and a nut, wherein:

[0009] The two ends of the clamp body can overlap each other to form a ring structure that can be attached to the pipeline;

[0010] The bolt is located at one end of the clamp body and passes through the other end;

[0011] The washer is elastically deformable, and the washer is sleeved on the bolt and located on the other end of the clamp body away from the bolt.

[0012] The nut can be screwed onto the bolt, connecting the two ends of the clamp body into one piece, and pressing the washer onto the clamp body to deform it.

[0013] Preferably, the nut is recessed axially toward the entry end of the bolt to form a mounting groove, the mounting groove is coaxially arranged with the internal thread of the nut, and the washer is embedded in the mounting groove.

[0014] Preferably, the mounting groove has a retaining edge along its circumferential direction. The inner diameter of the retaining edge is smaller than the outer diameter of the washer and larger than the outer diameter of the bolt. The washer is embedded in the mounting groove and is limited by the retaining edge.

[0015] Preferably, the clamp body includes:

[0016] The first body has a first connecting part and a first overlapping part respectively provided at both ends;

[0017] The second body has a second connecting part and a second overlapping part at each end;

[0018] The first connecting part is hinged to the second connecting part so that the first body and the second body can rotate relative to each other;

[0019] The bolt is disposed on the first lap joint, and the second lap joint is provided with a clearance groove for the bolt to pass through.

[0020] Preferably, the bolt is pivotally connected to the first lap joint, and the rotation axis of the bolt is perpendicular to the radial plane when the clamp body forms a ring structure.

[0021] Preferably, the first overlapping portion is provided with a first fitting plane on the side facing the second overlapping portion, and the second overlapping portion is provided with a second fitting plane on the side facing the first overlapping portion, so that the first fitting plane and the second fitting plane can fit together when the clamp body tightens the pipeline.

[0022] Preferably, the second overlapping portion has a third contact plane on the side opposite to the first overlapping portion, so that when the nut is screwed into the bolt, its end can contact the third contact plane.

[0023] Preferably, the first connecting part is provided with a first limiting surface on the side facing the second connecting part, and the second connecting part is provided with a second limiting surface on the side facing the first connecting part, so that when the first body and the second body rotate relative to each other around the hinge point to the maximum angle, the first limiting surface abuts against the second connecting part, and the second limiting surface abuts against the first connecting part, thereby restricting the first body and the second body from continuing to rotate.

[0024] Preferably, the washer is made of nylon.

[0025] Preferably, the outer circumferential surface of the nut is a regular hexagonal structure, and the distance between opposite sides of the regular hexagon is adapted to the opening size of a standard wrench.

[0026] The beneficial effects of this utility model are:

[0027] This invention utilizes the elastic pressure generated by the deformation of the washer to significantly increase the friction between the threads, effectively limiting the relative rotation of the nut and bolt. Even if the equipment vibrates during operation, the nut is not easy to loosen, thus ensuring that the clamp body always maintains sufficient tightening force on the pipeline, guaranteeing the sealing performance of the pipeline connection and reducing the occurrence of leakage problems. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the anti-loosening clamp provided by this utility model. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the anti-loosening clamp provided by this utility model. Figure 2 ;

[0030] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 This is a schematic diagram of the structure of the washer and nut provided by this utility model;

[0032] Figure 5 This is a cross-sectional view of the washer and nut provided by this utility model.

[0033] In the picture:

[0034] 1. Clamp body; 11. First body; 111. First connecting part; 112. First overlapping part; 113. First mating plane; 114. First limiting surface; 12. Second body; 121. Second connecting part; 122. Second overlapping part; 123. Clearance groove; 124. Second mating plane; 125. Third mating plane; 126. Second limiting surface; 2. Bolt; 3. Washer; 4. Nut; 41. Mounting groove; 42. Edge retainer. Detailed Implementation

[0035] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0036] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0037] In this application, the term "and / or" describes a relationship between related objects, indicating that three relationships can exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of only one centrifugal vortex magnetic pump, the simultaneous existence of one centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, or the existence of only one centrifugal vortex magnetic pump. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0038] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0039] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0040] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0041] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0042] Please see Figures 1 to 5 This embodiment provides an anti-loosening clamp for connecting mating pipes. The anti-loosening clamp includes a clamp body 1, a bolt 2, a washer 3, and a nut 4. The two ends of the clamp body 1 can overlap each other to form a ring structure that can be held onto the pipe. The bolt 2 is disposed at one end of the clamp body 1 and passes through the other end. The washer 3 is elastically deformable and is sleeved on the bolt 2, located on the other end of the clamp body 1 away from the bolt 2. The nut 4 can be screwed to the bolt 2, connecting the two ends of the clamp body 1 into one unit, and pressing the washer 3 onto the clamp body 1 to cause it to deform, thereby increasing the friction between the nut 4 and the bolt 2.

[0043] When connecting pipelines, the two ends of the clamp body 1 overlap to form a ring structure that hugs the pipeline. After the bolt 2 passes through both ends of the clamp body 1, the nut 4, during the screwing process with the bolt 2, will exert a squeezing effect on the washer 3 fitted on the bolt 2, causing the washer 3 to undergo elastic deformation. Since the washer 3 is fitted on the bolt 2 and located between the other end of the clamp body 1 and the nut 4, its deformation will generate a continuous elastic reaction force, which not only tightly presses the nut 4 and the clamp body 1 together, but also increases the friction at the threaded connection between the bolt 2 and the nut 4 through this pressure.

[0044] With this configuration, the elastic pressure generated by the deformation of the washer 3 significantly increases the friction between the threads, effectively limiting the relative rotation between the nut 4 and the bolt 2. Even if the equipment vibrates during operation, the nut 4 is not easy to loosen, thus ensuring that the clamp body 1 always maintains sufficient tightening force on the pipeline, ensuring the sealing performance of the pipeline connection and reducing the occurrence of leakage problems.

[0045] To further enhance connection reliability, the nut 4 is recessed axially at the inlet end facing the bolt 2 to form a mounting groove 41. The mounting groove 41 is coaxially aligned with the internal thread of the nut 4, and the washer 3 is embedded in the mounting groove 41. Understandably, during the screwing of the nut 4 and bolt 2 and the compression of the washer 3, the mounting groove 41 restricts the radial and axial displacement of the washer 3, ensuring that the washer 3 remains in the axial position corresponding to the threaded mating part, preventing the washer 3 from deviating from the thread clearance area due to force displacement. Therefore, when the washer 3 is compressed and deformed, its deformation direction is more likely to be towards the thread clearance between the nut 4 and bolt 2, ensuring that the deformed washer 3 can accurately and stably fill the thread clearance locally, further enhancing the sliding friction between the threads.

[0046] Furthermore, the mounting groove 41 has a retaining edge 42 circumferentially arranged at its opening. The inner diameter of the retaining edge 42 is smaller than the outer diameter of the washer 3 but larger than the outer diameter of the bolt 2. The washer 3 is embedded in the mounting groove 41 and limited by the retaining edge 42. Because the inner diameter of the retaining edge 42 is smaller than the outer diameter of the washer 3, when the nut 4 is screwed onto the bolt 2 and the washer 3 is compressed, the washer 3 cannot be dislodged axially from the opening of the mounting groove 41 during the deformation caused by compression, ensuring that the washer 3 is always confined within the mounting groove 41. At the same time, the inner diameter of the retaining edge 42 is larger than the outer diameter of the bolt 2, so it will not obstruct the bolt 2 from passing through the nut 4 and will not affect the screwing operation.

[0047] In this embodiment, the clamp body 1 includes a first body 11 and a second body 12. The first body 11 has a first connecting portion 111 and a first overlapping portion 112 at both ends. The second body 12 has a second connecting portion 121 and a second overlapping portion 122 at both ends. The first connecting portion 111 and the second connecting portion 121 are hinged together, allowing the first body 11 and the second body 12 to rotate relative to each other. A bolt 2 is disposed on the first overlapping portion 112, and the second overlapping portion 122 has a clearance groove 123 for the bolt 2 to pass through.

[0048] Understandably, the first body 11 and the second body 12 achieve relative rotation through the hinge of the first connecting part 111 and the second connecting part 121. This allows the clamp to be opened during installation, creating a larger opening space, which facilitates the fitting of the clamp body 1 onto the mating pipe. This is especially beneficial for fixed or difficult-to-move pipes, as it eliminates the need to forcibly open the ring structure, reducing the difficulty of installation. Furthermore, the bolt 2 of the first overlapping part 112 passes through the relief groove 123 of the second overlapping part 122, allowing for smooth screw-on fixing after the clamp body 1 is closed, ensuring the continuity of the connection operation.

[0049] In practical applications, the first body 11 and the second body 12 are hinged to allow relative rotation, easily opening to form a large opening for precise pipe installation. Furthermore, the bolt 2 of the first lap joint 112 can smoothly pass through the clearance groove 123 of the second lap joint 122, reducing alignment difficulties during installation. Ordinary workers can easily ensure that the bolt 2 and nut 4 are accurately matched and fully tightened, guaranteeing the initial preload. A threaded connection with a stable initial preload provides a more stable foundation against loosening during equipment vibration transmission, reducing the risk of loosening due to improper initial installation. This further helps maintain the tightening force of the anti-loosening clamp on the pipe, further reducing vibration-induced sealing deficiencies and leaks.

[0050] In other embodiments, the clamp body 1 can also be a one-piece structure made of elastic metal material, with a pre-set opening on one side that can overlap each other. During installation, the opening is opened by external force, and the body is deformed by the elasticity of the material to fit onto the pipeline. After the external force is released, the body initially tightens the pipeline by relying on the elastic restoring force, and then the bolts 2 and nuts 4 are screwed together to complete the fixation.

[0051] To further enhance operational convenience, bolt 2 is pivotally connected to the first lap joint 112, and the rotation axis of bolt 2 is perpendicular to the radial plane of the clamp body 1 when it forms a ring structure. When the clamp body 1 is opened to form an opening for pipe installation, bolt 2 can rotate around this axis because it is pivotally connected to the first lap joint 112 and its rotation axis is perpendicular to the radial plane of the ring structure. At this time, bolt 2 can be rotated to a position away from the opening area, preventing it from protruding from the opening and obstructing it. This ensures that there is no bolt 2 obstructing the opening of the clamp body 1, allowing the pipe to pass through the opening more smoothly into the clamp body 1, reducing interference with bolt 2 during pipe installation. Especially when installing pipes that are already fixed or in a restricted position, avoiding bolt 2 obstruction reduces alignment difficulty, making it easier for ordinary workers to complete the installation operation, improving installation convenience and efficiency. Simultaneously, it ensures that subsequent bolt 2 can smoothly rotate to the corresponding position and pass through the clearance groove 123 without affecting the bolting fixing step.

[0052] Specifically, a first contact surface 113 is provided on the side of the first overlapping portion 112 facing the second overlapping portion 122, and a second contact surface 124 is provided on the side of the second overlapping portion 122 facing the first overlapping portion 112, so that the first contact surface 113 and the second contact surface 124 can fit together when the clamp body 1 tightens the pipeline. When the clamp body 1 tightens the pipeline, the first contact surface 113 and the second contact surface 124 fit together, which maximizes the contact area of ​​the two overlapping portions and distributes the force evenly. This allows the preload of the bolt 2 to be transmitted more evenly to the entire clamp body 1, avoiding stress concentration caused by local contact, and thus making the clamp's tightening force on the pipeline more stable.

[0053] More importantly, the fit eliminates the gap between the two overlapping parts, reducing relative sway caused by the gap when the equipment vibrates, thus reducing the impact of vibration on the bolt connection and further enhancing the anti-loosening ability of the threaded connection. In addition, the uniform tightening force is transmitted to the pipeline sealing surface, which can avoid sealing failure caused by uneven local stress. Combined with the tight contact of the mating surfaces, it can more reliably ensure the sealing performance of the pipeline connection.

[0054] Preferably, a third contact surface 125 is provided on the side of the second overlapping portion 122 opposite to the first overlapping portion 112, so that the end of the nut 4 can contact the third contact surface 125 when screwed onto the bolt 2. The contact surface 125 with the end of the nut 4 allows the tightening force of the nut 4 to be evenly applied to the second overlapping portion 122, avoiding local stress concentration caused by insufficient contact area or uneven contact, and preventing the second overlapping portion 122 from deforming under long-term screw stress or equipment vibration. In addition, the contact ensures that the nut 4 will not tilt when tightened, keeping the axes of the bolt 2 and the nut 4 coaxial, and the preload can be accurately transmitted axially to the clamp body 1, avoiding lateral force that weakens the preload effect and ensuring the stability of the initial preload. When the equipment vibrates, the tightly contacting surface can reduce the relative sliding between the nut 4 and the second overlapping portion 122, and the friction of the contact surface enhances the anti-loosening ability of the nut 4, further suppressing the loosening of the threads caused by vibration, thereby stabilizing the clamp's tightening force and sealing performance on the pipeline.

[0055] To further enhance operational convenience, a first limiting surface 114 is provided on the side of the first connecting part 111 facing the second connecting part 121, and a second limiting surface 126 is provided on the side of the second connecting part 121 facing the first connecting part 111. When the first body 11 and the second body 12 rotate relative to each other around the hinge point to their maximum angle, the first limiting surface 114 abuts against the second connecting part 121, and the second limiting surface 126 abuts against the first connecting part 111, thereby restricting further rotation of the first body 11 and the second body 12. Once the maximum rotation angle is fixed, the size and position of the anti-loosening clamp opening remain stable, preventing excessive opening displacement or expansion due to excessive rotation. At this point, during pipe installation, the pipe can be directly aligned with the stable opening area without the need for manual adjustment of the relative angle between the first body 11 and the second body 12, reducing alignment deviations caused by angular sway and making the installation operation smoother.

[0056] In addition, the contact between the first limiting surface 114 and the second limiting surface 126 can precisely control the maximum rotation angle, avoiding the hinge part from bearing torque or tension beyond the design range due to excessive rotation angle, thereby reducing the risk of deformation and breakage of the hinge structure and extending the service life of the clamp.

[0057] In this embodiment, washer 3 is made of nylon. It is understood that nylon has a certain degree of elasticity and plasticity; when the clamp is tightened, the nylon washer can deform appropriately with pressure to partially fill the space between the mating threads of the bolt 2 and the nut 4. It should be noted that, in addition to nylon, washer 3 can also be made of materials such as rubber washers or polytetrafluoroethylene (PTFE).

[0058] To improve work efficiency, the outer circumference of nut 4 is a regular hexagonal structure, and the distance between opposite sides of the hexagon is adapted to the opening size of a standard wrench. This design allows for tightening or loosening operations using an industry-standard wrench without the need for special tools, thereby reducing reliance on special tools and lowering tool procurement and maintenance costs. Especially in installation and maintenance scenarios, operators can quickly find the appropriate tool, improving work efficiency.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A type of anti-loosening clamp for connecting mating pipes, characterized in that, The anti-loosening clamp includes a clamp body (1), a bolt (2), a washer (3), and a nut (4), wherein: The two ends of the clamp body (1) can overlap each other to form a ring structure that can be attached to the pipeline; The bolt (2) is located at one end of the clamp body (1) and passes through the other end; The washer (3) is elastically deformable, and the washer (3) is sleeved on the bolt (2) and located on the other end of the clamp body (1) away from the bolt (2); The nut (4) can be screwed onto the bolt (2) to connect the two ends of the clamp body (1) into one piece and to press the washer (3) onto the clamp body (1) to deform it.

2. The anti-loosening clamp according to claim 1, characterized in that, The nut (4) is recessed axially toward the inlet end of the bolt (2) to form a mounting groove (41). The mounting groove (41) is coaxially arranged with the internal thread of the nut (4). The washer (3) is embedded in the mounting groove (41).

3. The anti-loosening clamp according to claim 2, characterized in that, The mounting groove (41) has a retaining edge (42) circumferentially arranged at the groove opening. The inner diameter of the retaining edge (42) is smaller than the outer diameter of the washer (3) and larger than the outer diameter of the bolt (2). The washer (3) is embedded in the mounting groove (41) and limited by the retaining edge (42).

4. The anti-loosening clamp according to claim 1, characterized in that, The clamp body (1) includes: The first body (11) has a first connecting part (111) and a first overlapping part (112) respectively provided at both ends; The second body (12) has a second connecting part (121) and a second overlapping part (122) respectively provided at both ends; The first connecting part (111) is hinged to the second connecting part (121) so that the first body (11) and the second body (12) can rotate relative to each other; The bolt (2) is disposed on the first lap joint (112), and the second lap joint (122) is provided with a relief groove (123) for the bolt (2) to pass through.

5. The anti-loosening clamp according to claim 4, characterized in that, The bolt (2) is pivotally connected to the first lap joint (112), and the rotation axis of the bolt (2) is perpendicular to the radial plane when the clamp body (1) forms a ring structure.

6. The anti-loosening clamp according to claim 4, characterized in that, The first overlapping portion (112) has a first fitting surface (113) on the side facing the second overlapping portion (122), and the second overlapping portion (122) has a second fitting surface (124) on the side facing the first overlapping portion (112), so that the first fitting surface (113) and the second fitting surface (124) can fit together when the clamp body (1) tightens the pipeline.

7. The anti-loosening clamp according to claim 4, characterized in that, The second overlapping part (122) is provided with a third contact plane (125) on the side opposite to the first overlapping part (112) so that when the nut (4) is screwed to the bolt (2), its end can be contacted with the third contact plane (125).

8. The anti-loosening clamp according to claim 4, characterized in that, The first connecting part (111) is provided with a first limiting surface (114) on the side facing the second connecting part (121), and the second connecting part (121) is provided with a second limiting surface (126) on the side facing the first connecting part (111). When the first body (11) and the second body (12) rotate relative to each other around the hinge point to the maximum angle, the first limiting surface (114) abuts against the second connecting part (121), and the second limiting surface (126) abuts against the first connecting part (111), thereby restricting the first body (11) and the second body (12) from continuing to rotate.

9. The anti-loosening clamp according to claim 1, characterized in that, The gasket (3) is made of nylon.

10. The anti-loosening clamp according to claim 1, characterized in that, The outer circumference of the nut (4) is a regular hexagonal structure, and the distance between opposite sides of the regular hexagon is adapted to the opening size of a standard wrench.

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