CN218917046U

CN218917046U - Circumferential tensile test device

Info

Publication number: CN218917046U
Application number: CN202222847958.7U
Authority: CN
Inventors: 熊康; 鲁梦陈; 郭雪蓉; 陈月婷; 杨岩
Original assignee: China Ordnance Industry Group Jiangshan Heavy Industry Research Institute Co ltd
Current assignee: China Ordnance Industry Group Jiangshan Heavy Industry Research Institute Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-04-25
Anticipated expiration: 2032-10-27

Abstract

The utility model relates to a circumferential tensile test device, which comprises: a connecting body; the interval is located a plurality of extensible members outside the connecting body, every the extensible member is kept away from the equal detachable of one end of connecting the main part is connected with the top, the top is kept away from the one end of connecting the main part is equipped with arc structure, arc structure is used for supporting the inner wall of holding the sample. Because with top detachable install in the extensible member, can realize changing not unidimensional arc structure through the top on the change extensible member, and then satisfy the hoop tensile test of unidimensional sample. The application range of the circumferential tensile test device is enlarged.

Description

Circumferential tensile test device

Technical Field

The utility model relates to the field of circumferential tensile strength test, in particular to a circumferential tensile test device.

Background

At present, when the circumferential tensile strength of a part is tested, a tension test is required to be carried out on the annular part, and the circumferential tensile strength of the part is judged by measuring the bearable tension of the part.

In the related art, in order to stretch and draw annular part, can overlap annular sample piece on the excircle of semicylindrical device, through the relative flexible of drive semicylindrical device, improve the area of contact with the sample piece in the tensile process, make the sample piece receive even hoop force in the test process.

However, the sizes of test specimens are various, and the existing test devices cannot meet the test of specimens with different sizes. When testing other size samples, the test sample is not even circumferential force, but tensile force in tangential direction of the joint and the circular arc at the joint of the semi-cylindrical device, so that the test error is larger, and the test precision cannot be ensured.

Disclosure of Invention

The embodiment of the utility model provides a circumferential tensile test device, which aims to solve the problem that the application range of the test device in the related technology is narrow.

In a first aspect, there is provided a hoop tensile test apparatus comprising: a connecting body; the interval is located a plurality of extensible members outside the connecting body, every the extensible member is kept away from the equal detachable of one end of connecting the main part is connected with the top, the top is kept away from the one end of connecting the main part is equipped with arc structure, arc structure is used for supporting the inner wall of holding the sample.

In some embodiments, the connecting body includes a cylindrical box, the telescopic members are uniformly distributed along the circumferential direction of the box, and the telescopic members are oil cylinders; the oil pumping device comprises a box body and is characterized in that the box body is provided with an oil inlet connected with an oil pumping device, the axis of the oil inlet is collinear with the axis of the box body, and the oil pumping device can pump oil to all telescopic pieces simultaneously through the box body so as to realize synchronous expansion and contraction of all telescopic pieces.

In some embodiments, the telescopic members extend along the radial direction of the box body, and each telescopic member is an oil cylinder with the same specification.

In some embodiments, the expansion piece is provided with a digital display device, and the digital display device is used for displaying the real-time pressure of the expansion piece.

In some embodiments, the telescopic member comprises a cylinder and a piston, the cylinder is connected with the connecting body, the piston is arranged on one side of the cylinder away from the connecting body, and one end of the piston away from the cylinder is connected with the plug.

In some embodiments, the plug is screwed with the piston, so that the plug is detachably mounted on the expansion piece.

In some embodiments, the radius of the arcuate structure to which each telescoping member is attached is equal.

In some embodiments, the plug comprises a connecting piece, the connecting piece is detachably connected with the telescopic piece, the connecting piece is connected with a plurality of support rods, and one side, away from the telescopic piece, of the support rods is fixed to the arc-shaped structure.

In some embodiments, the arc-shaped structures are symmetrically disposed along the connector axis, and the support rods are also symmetrically disposed along the connector axis.

In some embodiments, the support bars are arranged in a fan shape.

The technical scheme provided by the utility model has the beneficial effects that:

the embodiment of the utility model provides a circumferential tensile test device, because a plurality of telescopic members are arranged outside a connecting main body, the side, far away from the connecting main body, of each telescopic member is provided with a plug with an arc-shaped structure, and each arc-shaped structure can be propped against the inner wall of a sample piece far away from the connecting main body through the telescopic of the telescopic members, so that the circumferential tensile test is realized. And, the plug detachable connects in connecting the main part, can realize changing the arc structure of different radiuses and support the sample piece through changing the plug, adapts to the hoop tensile test of different size sample pieces, can enlarge the testing range of hoop tensile test by a wide margin. Therefore, the circumferential tensile test suitable for various sizes of samples is provided, and the application range of the test device is widened.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a circumferential tensile test device provided in an embodiment of the present utility model.

In the figure:

1. a connecting body; 11. a case; 12. an oil inlet;

2. a telescoping member; 21. a cylinder; 22. a piston;

3. a plug; 31. a connecting piece; 32. an arc-shaped structure; 33. and (5) supporting the rod.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model provides a circumferential tensile test device which can solve the problem that the application range of the test device in the related technology is narrow.

Referring to fig. 1, an apparatus for testing circumferential tensile according to an embodiment of the present utility model may include: a connecting body 1; the interval is located a plurality of extensible members 2 outside the connecting body 1, every extensible member 2 keep away from the equal detachable of one end of connecting body 1 is connected with top 3, top 3 is kept away from the one end of connecting body 1 is equipped with arc structure 32, arc structure 32 is used for supporting the inner wall of holding the sample. In this embodiment, through the extension of a plurality of extensible members 2, make a plurality of tops 3 keep away from connecting main part 1, the one end that connecting main part 1 was kept away from to top 3 is equipped with the arc structure 32 that is used for supporting the sample piece, and then realizes the hoop tensile test to the sample piece. Through setting up top 3 to can dismantle with extensible member 2 and be connected, and be used for supporting the arc structure of holding the sample inner wall and locate top 3 departments, can realize the hoop tensile test of the different diameter sample of adaptation through changing top 3 of equidimension, the application scope of the test device of extension. In this embodiment, the telescopic member 2 is an oil cylinder, and the telescopic member 2 is driven to extend by hydraulic oil, and in other embodiments, the telescopic member 2 may also be an electric cylinder or other extensible element. In this embodiment, the connecting body 1 is connected with four telescopic members 2, and the four telescopic members 2 are uniformly distributed along the circumferential direction of the connecting body 1. In other embodiments, other numbers of telescoping members 2 may be selectively attached to the connecting body 1 depending on the size of the sample.

In some alternative embodiments, the connecting body 1 includes a cylindrical box 11, the telescopic members 2 are uniformly distributed along the circumferential direction of the box 11, and the telescopic members 2 are cylinders; the oil pumping device comprises a box body 11 and is characterized in that the box body 11 is provided with an oil inlet 12 connected with an oil pumping device, the axis of the oil inlet 12 is collinear with the axis of the box body 11, and the oil pumping device can pump oil to all the telescopic pieces 2 through the box body 11 at the same time so as to realize synchronous telescopic of all the telescopic pieces 2. Through evenly distributed the extensible member 2 along the circumference direction of the box 11, each angle of the sample member can be propped against when the extensible member 2 extends, so that the circumferential tensile test meets the requirements. The oil pumping device pumps oil to each telescopic member 2 by using the box 11, so that each telescopic member 2 can be simultaneously telescopic. The oil pumping mechanism is reduced, the cost is reduced, and the simultaneous expansion and contraction of the expansion piece 2 is better ensured. By arranging the axis of the oil inlet 12 to be collinear with the axis of the box 11, the path length of hydraulic oil reaching each telescopic member 2 in the oil pumping process is basically the same, and the synchronous telescopic accuracy of the telescopic members 2 is improved.

In some alternative embodiments, the telescopic members 2 extend along the radial direction of the case 11, and each telescopic member 2 is an oil cylinder of the same specification. The jack can be radially extended and contracted by extending the extension member 2 in the radial direction of the case 11, and the extension member 2 receives an axial force when the inner wall of the sample is abutted against. Since the telescopic member 2 is prevented from being subjected to radial forces, the risk of damage to the telescopic member 2 is reduced. By setting the telescopic members 2 to be oil cylinders of the same specification, the extension amounts of the telescopic members 2 are the same when the hydraulic oil with the same flow rate is pumped in.

In some alternative embodiments, the expansion member 2 is provided with a digital display device for displaying the real-time pressure of the expansion member 2. The pressure is displayed in real time through the digital display device, so that the reading in the test process is facilitated. In the measuring process, the pressure measured by the digital display device when the test sample piece breaks is the test data required in the circumferential tensile test.

Referring to fig. 1, in some alternative embodiments, the telescopic member 2 includes a cylinder 21 and a piston 22, the cylinder 21 is connected to the connecting body 1, the piston 22 is disposed on a side of the cylinder 21 away from the connecting body 1, and the plug 3 is connected to an end of the piston 22 away from the cylinder 21. The piston 22 is driven to move by pumping oil into the cylinder 21, thereby realizing the movement of the plug 3. And (5) completing the circumferential stretching of the sample.

In some alternative embodiments, the plug 3 is screwed with the piston 22, so as to realize the detachable mounting of the plug 3 to the telescopic member 2. Realize that plug 3 detachable installs in extensible member 2 through threaded connection, simple to operate and fixed firm. In this embodiment, the plug 3 is provided with an internal thread, and by setting the end of the telescopic member 2 to be an external thread structure, the plug 3 is sleeved on the end of the telescopic member 2 and is in threaded connection with the telescopic member 2. In other embodiments, the end of the expansion piece 2 may radially extend out of the mounting protrusion provided with a through hole, and a threaded hole is provided in the plug 3, and the plug 3 is screwed with the threaded hole of the plug 3 by penetrating the mounting protrusion through a bolt, so as to realize the threaded connection of the plug 3 and the expansion piece 2. In this embodiment, the plug 3 is fixed more firmly by threaded connection, and compared with clamping or bonding, the fixing position is accurate and the installation is convenient.

In some alternative embodiments, the radius of the arcuate structures 32 to which each telescoping member 2 is attached are equal. The radial expansion of the sample piece can be realized by abutting the sample piece through the arc-shaped structures 32 with equal radius, and the circumferential tensile test can be better realized.

Referring to fig. 1, in some alternative embodiments, the plug 3 includes a connection member 31, the connection member 31 is detachably connected to the expansion member 2, the connection member 31 is connected to a plurality of support rods 33, and a side of the support rods 33 away from the expansion member 2 is fixed to the arc-shaped structure 32. That is, the fixing of the arc structure 32 is achieved by connecting the plurality of support rods 33 through the connecting member 31, and the connection strength of the arc structure 32 and the telescopic member 2 is improved. In this embodiment, the end of the connecting member 31 remote from the telescopic member 2 is also connected to the arc-shaped structure 32.

Referring to fig. 1, in some alternative embodiments, the arc-shaped structures 32 are symmetrically disposed along the axis of the connecting member 31, and the support rods 33 are also symmetrically disposed along the axis of the connecting member 31. By arranging the arc-shaped structures 32 axially symmetrically along the axis of the connecting piece 31, when the arc-shaped structures 32 are abutted against the sample piece, the two sides of the arc-shaped structures 32 can be subjected to approximately equal abutting force, and deflection deformation of the arc-shaped structures 32 relative to the connecting piece 31 is reduced. By arranging the support rods 33 axisymmetrically along the connecting piece 31, the stress environment of the arc-shaped structure 32 is improved.

In some alternative embodiments, as shown in fig. 1, the support rods 33 are arranged in a fan shape. A plurality of triangles may be enclosed by the support rods 33 arranged in a fan shape. The deformation resistance of the arc structure 32 can be improved more than the parallel arrangement of the support rods 33.

The principle of the circumferential tensile test device provided by the embodiment of the utility model is as follows:

because with top 3 detachable install in extensible member 2, can realize changing not unidimensional arc structure 32 through changing the top 3 on the extensible member 2, and then satisfy the hoop tensile test of unidimensional sample. The application range of the circumferential tensile test device is enlarged.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present utility model, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circumferential tensile testing apparatus, comprising:

a connecting body (1);

the interval is located a plurality of extensible members (2) outside connecting body (1), every extensible member (2) are kept away from connecting body (1) one end all detachable is connected with top (3), top (3) are kept away from connecting body (1) one end is equipped with arc structure (32), arc structure (32) are used for supporting the inner wall of holding the sample.

2. The circumferential tensile testing apparatus of claim 1, wherein:

the connecting main body (1) comprises a cylindrical box body (11), the telescopic parts (2) are uniformly distributed along the circumferential direction of the box body (11), and the telescopic parts (2) are oil cylinders;

the oil pumping device is characterized in that the box body (11) is provided with an oil inlet (12) connected with an oil pumping device, the axis of the oil inlet (12) is collinear with the axis of the box body (11), and the oil pumping device can pump oil to all the telescopic pieces (2) through the box body (11) at the same time so as to realize synchronous telescoping of all the telescopic pieces (2).

3. The circumferential tensile testing apparatus of claim 2, wherein:

the telescopic pieces (2) extend along the radial direction of the box body (11), and the telescopic pieces (2) are oil cylinders with the same specification.

4. The circumferential tensile testing apparatus of claim 2, wherein:

the telescopic piece (2) is provided with a digital display device, and the digital display device is used for displaying the real-time pressure of the telescopic piece (2).

5. The circumferential tensile testing apparatus of claim 2, wherein:

the telescopic piece (2) comprises a cylinder barrel (21) and a piston (22), the cylinder barrel (21) is connected with the connecting main body (1), the piston (22) is arranged on one side, away from the connecting main body (1), of the cylinder barrel (21), and one end, away from the cylinder barrel (21), of the piston (22) is connected with the plug (3).

6. The circumferential tensile testing apparatus of claim 5, wherein:

the plug (3) is in threaded connection with the piston (22) so as to realize that the plug (3) is detachably arranged on the telescopic piece (2).

7. The circumferential tensile testing apparatus of claim 1, wherein:

the radius of the arc-shaped structures (32) connected with the telescopic pieces (2) is equal.

8. The circumferential tensile testing apparatus of claim 1, wherein:

the plug (3) comprises a connecting piece (31), the connecting piece (31) is detachably connected with the telescopic piece (2), the connecting piece (31) is connected with a plurality of supporting rods (33), and one side, away from the telescopic piece (2), of the supporting rods (33) is fixed to the arc-shaped structure (32).

9. The circumferential tensile testing apparatus of claim 8, wherein:

the arc-shaped structures (32) are symmetrically arranged along the axis of the connecting piece (31), and the supporting rods (33) are also symmetrically arranged along the axis of the connecting piece (31).

10. The circumferential tensile testing apparatus of claim 8, wherein:

the support rods (33) are arranged in a fan shape.