Hoop

Abstract

The hoop comprises a first C-shaped clamp and a second C-shaped clamp, one ends of the first C-shaped clamp and the second C-shaped clamp are hinged to each other, the ends, away from the hinged ends, of the first C-shaped clamp and the second C-shaped clamp are respectively provided with an extension portion, and the extension portion of the first C-shaped clamp is hinged to a locking handle with a hanging groove. An elastic assembly is further included, the elastic assembly comprises two cylindrical springs which are located at the front ends of the two extension parts, are parallel to each other and are arranged in a spaced mode, and one ends of the two cylindrical springs are connected with lower swing arms which extend in the axial direction of the cylindrical springs and then are bent in the direction of the extension parts of the second C-shaped clamp. The tail ends of the lower swing arms are provided with hanging lugs hinged to the outer side of the extension portion of the second C-shaped clamp, the other ends of the two cylindrical springs are provided with upper swing arms which extend towards the radial direction of the cylindrical springs, extend towards the extension portion of the first C-shaped clamp and reach the side face of the extension portion 12, the tail ends of the two upper swing arms are connected through a cross rod, and the cross rod is matched with the hanging groove. The device has the advantages of being good in adaptability, simple in structure, light in weight and low in production cost.

Description

Technical Field

[0001] This utility model relates to the field of pipe connectors, specifically to a clamp. Background Technology

[0002] A clamp (pipe clamp) is a connecting device used to connect pipes, valves and pipe fittings, and is used to tighten the connection between adjacent joints.

[0003] Current clamp (pipe clamp) connection methods include bolt fastening and snap fastening, etc. The clamp plates are generally double-piece, and the typical double-piece clamp plates are often made of zinc alloy or aluminum alloy casting. Although this can effectively ensure the overall strength, it greatly increases the production cost and its own weight. At the same time, because the clamp plates made of zinc alloy or aluminum alloy casting have high overall rigidity, they lack elastic deformation margin. When tightening, they are prone to point contact with the joint flanges of adjacent joints. The axial force consistency at various positions in the circumferential direction of the joint flange is poor, resulting in local stress concentration and deformation of the joint flange.

[0004] Therefore, in response to this problem, the applicant applied for a quick-release clamp on January 5, 2024, and was granted authorization on January 7, 2025. The application discloses a semi-circular first and second C-shaped clamp. One end of the first C-shaped clamp is hinged to one end of the second C-shaped clamp. The end of the first C-shaped clamp away from the hinge end has a first extension portion, and the end of the second C-shaped clamp away from the hinge end has a second extension portion. The virtual engagement plane of the first and second C-shaped clamps is parallel to and located between the first and second extension portions. The first C-shaped clamp and the side of the first extension portion facing the virtual engagement plane, as well as the side of the second C-shaped clamp and the second extension portion facing the virtual engagement plane, are all provided with engagement grooves. The cross-section of the engagement groove is trapezoidal, with the longer side closer to the virtual engagement plane. The first C-shaped clamp and the first extension portion are integrally stamped from sheet metal, and the second C-shaped clamp and the second extension portion are integrally stamped from sheet metal. This design has the advantages of simple structure, light weight, and low production cost.

[0005] However, subsequent market feedback indicated that the clamp required gradual tightening using quick-release nuts to achieve a tight fit, which was time-consuming. Furthermore, the tightening force after clamping was often quite rigid, lacking effective elastic relief space and a lack of redundancy design that allowed for retraction. In situations such as pipeline impacts, it was difficult for the first and second C-shaped clamps to release force through expansion. Utility Model Content

[0006] Based on the above problems, the purpose of this utility model is to provide a clamp that is easy to install, has good adaptability, simple structure, light weight, and low production cost.

[0007] To address the above problems, the following technical solution is provided: A clamp, comprising a semi-circular first C-shaped clamp and a second C-shaped clamp, one end of the first C-shaped clamp and one end of the second C-shaped clamp being hinged together, both the first and second C-shaped clamps having an extension portion at the end away from the hinge end, and a locking handle with a hanging groove being hinged to the extension portion of the first C-shaped clamp; it also includes an elastic component, the elastic component comprising two cylindrical springs located at the front ends of the two extension portions, arranged parallel to each other and spaced apart from each other, one end of the two cylindrical springs being connected to a lower swing arm that extends in the axial direction of the cylindrical springs and then bends towards the extension portion of the second C-shaped clamp. The lower swing arm has a lug at its end that is hinged to the outer side of the extension of the second C-clamp. The other end of the two cylindrical springs has an upper swing arm that extends radially toward the cylindrical spring and toward the extension of the first C-clamp, reaching the side of the extension 12. The ends of the two upper swing arms are connected by a crossbar, which is adapted to the hanging groove. When the locking handle swings along the hinge point and approaches the outer wall of the first C-clamp, the hanging groove pushes the crossbar to increase the distance between the crossbar and the lug, causing the cylindrical spring to bend while stretching to store force, and causing the locking handle to pass the dead point position to lock the first C-clamp and the second C-clamp.

[0008] The present invention is further configured such that, after the locking handle passes the dead point position, the two cylindrical springs are located at the ends of the two outer extensions away from the first C-shaped clamp and the second C-shaped clamp that are hinged to each other.

[0009] The present invention is further configured such that the rotation directions of the two cylindrical springs are opposite to each other.

[0010] The present invention is further configured such that both lower swing arms are connected to the sides of the two cylindrical springs that are far apart from each other.

[0011] The present invention is further configured such that the locking handle includes a handle body and hinged walls located on both sides of the handle body, and the outer extension of the first C-shaped clip is located between the two hinged walls; the hanging groove is formed at the handle body.

[0012] The present invention is further configured such that the handle body is integrally connected to the hinge wall and is formed by stamping and bending of metal sheet.

[0013] The present invention is further configured such that the first C-shaped clamp and its extension, the second C-shaped clamp and its extension are provided with clamping grooves on the sides facing each other, and the clamping groove walls are arranged at a V-shape with each other.

[0014] The present invention is further configured such that the first C-shaped clip and its extension, and the second C-shaped clip and its extension are integrally connected and are both formed by stamping and bending of metal sheet.

[0015] The present invention is further configured such that the two cylindrical springs, the lower swing arm, the hanging ear, the upper swing arm, and the crossbar are integrally bent and rolled into shape by spring wire.

[0016] The present invention is further configured such that the first C-shaped clip has a first hinge ear formed by curling at one end away from the outer extension, and the second C-shaped clip has a second hinge ear formed by curling at one end away from the outer extension. The second hinge ear has a hinge groove for accommodating the first hinge ear at the middle section in the axial direction. The first hinge ear and the second hinge ear are hinged by a hinge pin.

[0017] The beneficial effects of this utility model are:

[0018] 1. When fixing, flip up the locking handle and hang the crossbar of the tension spring assembly in the hanging slot. Then swing the locking handle in the opposite direction to make the locking handle close to the outer wall of the first C-shaped clip, so that the outer extensions come together and the first C-shaped clip and the second C-shaped clip clamp the joint. At this time, because the distance between the crossbar and the hanging ear is far apart and they are open, the cylindrical spring is stretched and stored while bending and storing force, providing a larger range of elastic deformation, ensuring the stability of clamping the first C-shaped clip and the second C-shaped clip. At the same time, after the locking handle passes the dead point position, the locking handle is locked to prevent it from being unlocked in the opposite direction.

[0019] 2. When unlocking, simply flip the locking handle in the opposite direction to make it pass the dead point position. When the opening of the first C-shaped clamp and the second C-shaped clamp are inconsistent due to different sizes of connectors, dynamic compensation can be achieved by the elastic component itself stretching and storing force.

[0020] 3. It ensures overall strength while being lightweight and easy to process. Attached Figure Description

[0021] Figure 1 This is a first-person perspective three-dimensional structural diagram of the clamped state of this utility model.

[0022] Figure 2 This is a second-view three-dimensional structural diagram of the clamped state of this utility model.

[0023] Figure 3 This utility model Figure 1 A schematic diagram of the full sectional three-dimensional structure.

[0024] Figure 4 This is a three-dimensional structural diagram of the open state of this utility model.

[0025] The labels in the diagram mean: 10-First C-shaped clamp; 101-First hinge ear; 11-Second C-shaped clamp; 111-Second hinge ear; 112-Hinge groove; 12-Extension; 13-Clamping groove; 20-Locking handle; 21-Hanging groove; 22-Handle body; 23-Hinge wall; 30-Elastic component; 31-Cylindrical spring; 32-Lower swing arm; 33-Hanging ear; 34-Upper swing arm; 35-Crossbar. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] refer to Figures 1 to 4 ,like Figures 1 to 4 The clamp shown includes a semi-circular first C-shaped clamp 10 and a second C-shaped clamp 11. One end of the first C-shaped clamp 10 is hinged to one end of the second C-shaped clamp 11. Both the first C-shaped clamp 10 and the second C-shaped clamp 11 have an extension 12 at their ends away from the hinge ends. The extension 12 of the first C-shaped clamp 10 is hinged to a locking handle 20 with a hanging groove 21. The clamp also includes an elastic component 30, which includes two cylindrical springs 31 located at the front ends of the two extensions 12, arranged parallel to each other and spaced apart. One end of each cylindrical spring 31 is connected to a lower swing arm 32 that extends axially towards the cylindrical spring 31 and then bends towards the extension 12 of the second C-shaped clamp 11. The lower swing arm 32 has a lug 33 at its end that is hinged to the outer side of the extension 12 of the second C-shaped clamp 11. The other end of the two cylindrical springs 31 has an upper swing arm 34 that extends radially toward the cylindrical springs 31 and toward the extension 12 of the first C-shaped clamp 10, reaching the side of the extension 12. The ends of the two upper swing arms 34 are connected by a crossbar 35, which is adapted to the hanging groove 21. When the locking handle 20 swings along the hinge point and approaches the outer wall of the first C-shaped clamp 10, the hanging groove 21 pushes the crossbar 35 to increase the distance between the crossbar 35 and the lug 33, causing the cylindrical springs 31 to bend while stretching to store force, and causing the locking handle 20 to pass the dead point position (reference). Figures 1-3 Lock the first C-shaped clip 10 and the second C-shaped clip 11.

[0028] In the above structure, when fixed, flipping up the locking handle 20 hangs the crossbar 35 of the tension spring assembly into the hanging slot 21 (see reference). Figure 4Then, the locking handle 20 is swung in the opposite direction to bring it close to the outer wall of the first C-clamp 10, causing the outer extension 12 to come together and clamp the first C-clamp 10 and the second C-clamp 11 (not shown in the figure). At this time, since the distance between the crossbar 35 and the hanging ear 33 is far apart and they are open, the cylindrical spring 31 is stretched and stored while bending and storing force, providing a larger range of elastic deformation, ensuring the stability of clamping the first C-clamp 10 and the second C-clamp 11. At the same time, the locking handle 20 is locked after it passes the dead point position to prevent it from being unlocked in the opposite direction. When unlocking, simply flip the locking handle 20 in the opposite direction to make it pass the dead point position. When the opening of the first C-clamp 10 and the second C-clamp 11 is inconsistent after clamping due to different sizes of the joint (not shown in the figure), dynamic compensation can be achieved by the stretching and storing force of the elastic component 30 itself.

[0029] In this embodiment, after the locking handle 20 passes the dead point position, the two cylindrical springs 31 are located at the end of the two outer extensions 12 away from the first C-shaped clip 10 and the second C-shaped clip 11 that are hinged to each other.

[0030] The above structure provides sufficient deformation space for the elastic component 30, while also making the overall structural layout more compact.

[0031] In this embodiment, the two cylindrical springs 31 have opposite directions of rotation.

[0032] In the above structure, the consistency of the force on the two cylindrical springs 31 is ensured.

[0033] In this embodiment, both lower swing arms 32 are connected to the two cylindrical springs 31 on opposite sides.

[0034] In the above structure, it is beneficial for the two cylindrical springs 31 to move closer to each other, making the structure more compact.

[0035] In this embodiment, the locking handle 20 includes a handle body 22 and hinged walls 23 located on both sides of the handle body 22, and the outer extension 12 of the first C-shaped clip 10 is located between the two hinged walls 23; the hanging groove 21 is opened at the handle body 22.

[0036] In the above structure, the hinge wall 23 is hinged to the outer extension 12 of the first C-shaped clip 10 via a hinge pin; the lug 33 is hinged to the outer extension 12 of the second C-shaped clip 11 via a hinge pin.

[0037] In this embodiment, the handle 22 is integrally connected to the hinge wall 23 and is formed by stamping and bending of metal sheet.

[0038] The above structure ensures overall strength while being lightweight and easy to process.

[0039] In this embodiment, the first C-shaped clamp 10 and its extension 12, and the second C-shaped clamp 11 and its extension 12 are provided with clamping grooves 13 on the sides facing each other, and the groove walls of the clamping grooves 13 are arranged at an angle of V to each other.

[0040] In the above structure, the clamping grooves 13 at the first C-shaped clamp 10 and the second C-shaped clamp 11 are used to adapt to the joint (not shown in the figure), and the clamping grooves 13 of the extension portion 12 are used to improve the rigidity of the extension portion 12.

[0041] In this embodiment, the first C-shaped clip 10 and its extension 12, and the second C-shaped clip 11 and its extension 12 are all integrally connected and are formed by stamping and bending metal sheets.

[0042] The above structure ensures overall strength while being lightweight and easy to process.

[0043] In this embodiment, the two cylindrical springs 31, the lower swing arm 32, the hanging lug 33, the upper swing arm 34, and the crossbar 35 are integrally formed by bending and rolling the spring wire.

[0044] The above structure ensures overall reliability and facilitates production and assembly.

[0045] In this embodiment, the first C-shaped clip 10 is provided with a first hinge ear 101 formed by curling at one end away from the outer extension 12, and the second C-shaped clip 11 is provided with a second hinge ear 111 formed by curling at one end away from the outer extension 12. The second hinge ear 111 is provided with a hinge groove 112 for accommodating the first hinge ear 101 at the middle section in the axial direction. The first hinge ear 101 and the second hinge ear 111 are hinged by a hinge pin.

[0046] Compared to the offset hinge in the prior patent, the above structure allows for more uniform force distribution at the hinge point.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A clamp, comprising a semi-arc-shaped first C-clamp and a second C-clamp, wherein one end of the first C-clamp and one end of the second C-clamp are hinged together, and both the first C-clamp and the second C-clamp have an extension portion at their ends away from the hinge ends, characterized in that: The first C-clamp has a locking handle with a hanging groove hinged to its outer extension. It also includes an elastic component comprising two cylindrical springs located at the front ends of the two outer extensions, arranged parallel to each other and spaced apart. One end of each cylindrical spring is connected to a lower swing arm that extends axially towards the cylindrical spring and then bends towards the outer extension of the second C-clamp. The lower swing arm ends have hanging ears that are hinged to the outer side of the second C-clamp's outer extension. The other end of each cylindrical spring has an upper swing arm that extends radially towards the cylindrical spring and towards the outer extension of the first C-clamp, reaching the side of the outer extension 12. The ends of the two upper swing arms are connected by a crossbar, which is adapted to the hanging groove. When the locking handle swings along the hinge point and approaches the outer wall of the first C-clamp, the hanging groove pushes the crossbar, increasing the distance between the crossbar and the hanging ear. This causes the cylindrical springs to stretch and bend simultaneously, storing force and causing the locking handle to pass the dead point, locking both the first and second C-clamps.

2. The clamp according to claim 1, characterized in that: After the locking handle passes the dead point, the two cylindrical springs are located at the ends of the two outer extensions away from the hinged joints of the first C-shaped clamp and the second C-shaped clamp.

3. A clamp according to claim 1, characterized in that: The two cylindrical springs have opposite directions of rotation.

4. A clamp according to claim 1, characterized in that: Both lower control arms are connected to the opposite sides of the two cylindrical springs.

5. A clamp according to claim 1, characterized in that: The locking handle includes a handle body and hinged walls located on both sides of the handle body, with the outer extension of the first C-shaped clip located between the two hinged walls; the hanging groove is formed at the handle body.

6. A clamp according to claim 5, characterized in that: The handle body is integrally connected to the hinge wall and is formed by stamping and bending metal sheet.

7. A clamp according to claim 1, characterized in that: The first C-shaped clamp and its extension, and the second C-shaped clamp and its extension, have clamping grooves on their faces facing each other, and the walls of the clamping grooves are arranged at a V-shape.

8. A clamp according to claim 7, characterized in that: The first C-shaped clip and its extension, and the second C-shaped clip and its extension are both integrally connected and are formed by stamping and bending metal sheets.

9. A clamp according to claim 1 or 7, characterized in that: The two cylindrical springs, lower swing arm, lug, upper swing arm, and crossbar are integrally formed by bending and rolling the spring wire.

10. A clamp according to claim 1, characterized in that: The first C-shaped clip has a first hinge ear formed by curling at one end away from the outer extension, and the second C-shaped clip has a second hinge ear formed by curling at one end away from the outer extension. The second hinge ear has a hinge groove for accommodating the first hinge ear at the middle section in the axial direction. The first hinge ear and the second hinge ear are hinged by a hinge pin.

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