Clamping aid

Abstract

The utility model relates to a clamping auxiliary part, which is used for fixing a spring material on a clamping jaw of spring testing equipment and comprises a frosted layer, a clamping layer arranged on the outer side of the frosted layer and an elastic layer arranged between the frosted layer and the clamping layer, and an insertion cavity for accommodating a spring material is defined by the frosted layer. The frosted layer provides a rough contact surface to increase friction force, the elastic layer provides proper buffer and elastic support, and the clamping layer ensures the clamping stability, so that the clamping auxiliary part can effectively disperse the stress concentration effect of the clamping section, improves the clamping stability and reliability, and improves the clamping quality. Therefore, the small-caliber safety valve spring material is prevented from being broken in a tensile test.

Description

Technical Field

[0001] This utility model relates to a clamping auxiliary component. Background Technology

[0002] During the testing of safety valves, especially for the spring materials of small-diameter safety valves, a thorny problem often arises due to their small size and thin wire diameter: the spring material is prone to breakage in the clamping section of the tensile testing machine when testing tensile test data. This problem not only affects the accuracy of the tensile test but may also damage the testing equipment, increasing testing costs and time. Utility Model Content

[0003] The purpose of this invention is to provide a clamping auxiliary component that can improve the stability and reliability of clamping while preventing the spring material from breaking during tensile testing.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a clamping auxiliary component for fixing spring material onto the jaws of a spring testing device. The clamping auxiliary component includes a frosted layer, a retaining layer disposed on the outside of the frosted layer, and an elastic layer disposed between the frosted layer and the retaining layer. The frosted layer surrounds and forms an insertion cavity for accommodating the spring material.

[0005] Furthermore, a retaining groove is formed on the outer surface of the retaining layer.

[0006] Furthermore, the number of the retaining grooves is several.

[0007] Furthermore, the clamping aid is wound around the spring material.

[0008] Furthermore, the frosted layer, elastic layer, and retaining layer are bonded together with an adhesive.

[0009] Furthermore, the elastic layer is a sponge.

[0010] Furthermore, the elastic layer is formed by curing an epoxy resin adhesive.

[0011] Furthermore, the retaining layer is a copper alloy or a copper-nickel alloy.

[0012] The beneficial effects of this utility model are as follows: This application provides a rough contact surface through a frosted layer to increase friction, provides appropriate buffering and elastic support through an elastic layer, and ensures the stability of clamping through a locking layer. Therefore, by using the clamping auxiliary component of this application, the stress concentration effect of the clamping section can be effectively dispersed, improving the stability and reliability of clamping, thereby avoiding the breakage of the spring material of small-diameter safety valves in tensile tests.

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the use of the clamping auxiliary component shown in one embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of a clamping auxiliary component according to an embodiment of the present invention. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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 features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0017] Please see Figure 1 and Figure 2A preferred embodiment of this application shows a clamping auxiliary component 10 for fixing a spring material 20 onto the jaws 31 of a spring testing device 30. The clamping auxiliary component 10 includes a frosted layer 11, a retaining layer 12 disposed outside the frosted layer 11, and an elastic layer 13 disposed between the frosted layer 11 and the retaining layer 12. The frosted layer 11 forms an insertion cavity (not shown) to accommodate the spring material 20, so that the spring material 20 can be securely clamped. During testing, the spring material 20 is not yet coiled into a spring structure; it is a straight structure and can be referred to as a spring material strip. The clamping auxiliary component 10 is wound around both ends of the spring material strip. The clamping auxiliary component 10 wound around both ends of the spring material strip is formed by cutting and then coiling it around the spring material strip, and the jaws 31 clamp onto the clamping auxiliary component 10. By winding the clamping auxiliary component 10 around the spring material 20, installation and removal are facilitated, while ensuring that the spring material 20 maintains the correct position and shape during testing.

[0018] This application provides a rough contact surface through the abrasive layer 11 to increase friction, provides appropriate cushioning and elastic support through the elastic layer 13, and ensures clamping stability through the locking layer 12. Therefore, by using the clamping auxiliary component 10 of this application, the stress concentration effect of the clamping section can be effectively dispersed, improving the stability and reliability of clamping, thereby avoiding the breakage of the small-diameter safety valve spring material 20 in the tensile test.

[0019] In this embodiment, the abrasive layer 11 is sandpaper, which has a smooth surface and a frosted surface, with the frosted surface facing inwards to contact the spring material 20. The smooth surface faces the elastic layer 13. In this embodiment, the elastic layer 13 is formed by curing an epoxy resin adhesive. Since the epoxy resin adhesive can act as a connector while also having a certain degree of elasticity after curing, directly using the cured epoxy resin adhesive as the elastic layer 13 simplifies the structure. A locking groove is formed on the outer surface of the locking layer 12 (the surface not connected to the elastic layer 13). The locking groove enhances the friction between the locking layer 12 and the jaws 31 of the spring testing device 30, ensuring that the clamping auxiliary component 10 and the spring material 20 do not loosen or fall off during testing. Several locking grooves are evenly distributed on the outer surface of the locking layer 12 to provide multi-point locking and further improve stability. The locking layer 12 is made of stainless steel, copper alloy, or aluminum alloy. These materials have good mechanical strength and corrosion resistance, while maintaining sufficient flexibility to be rolled up.

[0020] In another embodiment, the elastic layer 13 is a sponge. The frosted layer 11, the elastic layer 13, and the retaining layer 12 are bonded together with an adhesive. The frosted layer 11, the elastic layer 13, and the retaining layer 12 are firmly bonded together by the adhesive to form a single integral structure, thereby improving the durability and reliability of the clamping aid 10. The adhesive can be an epoxy resin adhesive, a polyurethane adhesive, or an acrylic adhesive, etc.

[0021] By using the clamping auxiliary component 10, for spring materials with a diameter of less than 10mm, the friction between the clamping ends of the spring material is increased during tensioning. On the other hand, it prevents the deformation of the sample ends due to stress, which would lead to large errors in the test data. This better verifies that the test data of the spring material meets the technical design requirements, and ensures the quality of the spring material supply and the test performance of the safety valve.

[0022] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0023] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A clamping auxiliary component, characterized in that, The clamping auxiliary component, used to fix the spring material onto the jaws of the spring testing equipment, includes a frosted layer, a retaining layer disposed outside the frosted layer, and an elastic layer disposed between the frosted layer and the retaining layer. The frosted layer surrounds and forms an insertion cavity for accommodating the spring material.

2. The clamping auxiliary component as described in claim 1, characterized in that, A locking groove is formed on the outer surface of the locking layer.

3. The clamping auxiliary component as described in claim 2, characterized in that, The number of the locking grooves is several.

4. The clamping auxiliary component as described in claim 1, characterized in that, The clamping aid is wound around the spring material.

5. The clamping auxiliary component as described in claim 1, characterized in that, The frosted layer, elastic layer, and retaining layer are bonded together with an adhesive.

6. The clamping auxiliary component as described in claim 1, characterized in that, The elastic layer is a sponge.

7. The clamping auxiliary component as described in claim 2, characterized in that, The elastic layer is formed by curing an epoxy resin adhesive.

8. The clamping auxiliary component as described in claim 1, characterized in that, The retaining layer is a copper alloy or a copper-nickel alloy.

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