Safety device for tensile test

Abstract

The utility model relates to tensile test equipment technical field, concretely relates to a security device for tensile test, be used to stop the splash of sample fragment in the test process of tensile testing machine, it is including: two protective cover, respectively with the base rotary connection of tensile testing machine, when two protective cover rotary close up can completely cover the working area of tensile testing machine and its dangerous range, to form the closed protective space of isolation test environment and outside environment. The utility model discloses through setting up the second opening and closing structure at the side of protective cover, can be used for the quick installation of extensometer, the first opening and closing structure of protective cover front is used for taking and placing sample, simultaneously, the protective cover is designed into the structure of two halfs open and rotates around the axle, only need to rotate open two halfs cover when maintaining, can expose the working area of entire tensile testing machine completely, provides the unobstructed, spacious operating space for maintenance personnel, greatly simplifies the maintenance process, saves time and manpower.

Description

Technical Field

[0001] This utility model relates to the field of tensile testing equipment technology, and in particular to a safety protection device that facilitates tensile testing. Background Technology

[0002] Tensile testing involves clamping both ends of a metal specimen and then slowly stretching it until it breaks. This step allows us to clearly understand the metal's yield strength, tensile strength, elongation, and other mechanical properties under stress. These data provide necessary support for material design. At the moment of fracture, especially with high-strength steel or brittle materials, fragments may fly and injure people. Therefore, a protective cover is needed around the equipment. This not only prevents the fragments from flying but also protects the operator's safety, preventing damage to the clamps from affecting surrounding equipment, and makes experimental observation safer.

[0003] Currently available equipment protective covers are fully enclosed structures, which are not very operable. In particular, when it is necessary to clamp the extensometer onto the sample, the door of the protective cover must be opened. This leads to frequent opening and closing of the door during the test, which may cause the extensometer's circuitry to be broken and damage the precision extensometer device. Alternatively, the protective cover may lose its protective function if the door is not closed properly. Furthermore, when performing maintenance, calibration, cleaning, or replacement, it is usually necessary to completely disassemble the protective cover or operate only through a narrow door / window, which is extremely inconvenient. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a safety protection device that facilitates tensile testing in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides a safety protection device for tensile testing, used to prevent the splashing of specimen fragments during the tensile testing machine, comprising: Two protective covers are rotatably connected to the base of the tensile testing machine. When the two protective covers are rotated and closed, they can completely cover the working area and dangerous area of ​​the tensile testing machine to form a closed protective space that isolates the test environment from the external environment. The front of the protective cover is provided with a first opening and closing structure for partially opening the protective cover to take out and put in the sample. At least one of the two protective covers is provided with a second opening and closing structure on the side. The second opening and closing structure is used to provide an operating channel during the installation of measuring instruments and to maintain the protective function during the test. A locking structure is provided to reliably lock the protective shields as they rotate to close, preventing the two protective shields from separating from each other.

[0006] As a preferred embodiment of this utility model, the protective cover includes: The main frame with a hollow structure is formed by splicing the horizontal beams and vertical beams together. Glass, which is disposed in the hollow area of ​​the main frame.

[0007] As a preferred embodiment of this utility model, the device further includes: Two mounting bases are positioned opposite each other on the outside of the same protective cover; The rotating shaft has its two ends fixedly connected to the fixed base; A support plate is provided on the side of the base of the tensile testing machine; Two fixing clamps are mounted opposite each other on the same support plate; The movable clamp has one end rotatably connected to the fixed clamp. When the fixed clamp and the movable clamp are closed, they can fit together, and a bearing mounting groove is provided at the fitting point. A bearing is rotatably disposed in the bearing mounting groove, and the bearing is rotatably engaged with a recessed groove formed on the outer circumference of the rotating shaft. A limiting structure is used to lock the movable clamp and the fixed clamp to prevent relative movement between them.

[0008] As a preferred embodiment of this utility model, the limiting structure includes: A fixing block is provided at one end where the movable clamp and the fixed clamp fit together, and the fixing block has a connecting hole; A connector that is adapted to the connecting hole.

[0009] As a preferred embodiment of this utility model, the locking structure includes: A threaded rod that engages with a through hole formed on the surface of the rotating shaft; A threaded sleeve is fixedly mounted on the support plate, and the threaded sleeve has an internal thread groove that engages with the threaded rod.

[0010] As a preferred embodiment of this invention, the threaded rod is provided with a screwing groove at its top end for assisting in screwing.

[0011] As a preferred embodiment of this utility model, the first opening and closing structure includes: A door frame having a perforated structure on its surface for installing glass; Hinges, which are used to rotatably connect the door frame to the main frame; Locking device for locking the door frames on the two protective covers together.

[0012] As a preferred embodiment of this utility model, the second opening and closing structure includes: The window is located on the side of the main frame; movable hinge; A sealed door, which is fixed to one side of the window by the aforementioned movable hinge.

[0013] The beneficial effects of this utility model are as follows: By setting a second opening and closing structure on the side of the protective cover, the extensometer can be quickly installed. The first opening and closing structure on the front of the protective cover is used to pick up and put down the sample. At the same time, the protective cover is designed as a structure that opens in two halves and rotates around an axis. During maintenance, only the two halves need to be rotated open to fully expose the working area of ​​the tensile testing machine, providing maintenance personnel with an unobstructed and spacious operating space, greatly simplifying the maintenance process and saving time and manpower. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a three-dimensional structural diagram of the open state of this utility model; Figure 4 This is a three-dimensional structural diagram of the main frame, glass, window, and fixing base of this utility model; Figure 5 This is a three-dimensional structural diagram of the maintenance state of this utility model.

[0016] The markings in the diagram are as follows: 1. Tensile testing machine; 2. Main frame; 3. Glass; 4. Door frame; 5. Hinge; 6. Window; 7. Fixture; 8. Shaft; 9. Support plate; 10. Fixing clamp; 11. Movable clamp; 12. Bearing mounting groove; 13. Bearing; 14. Fixing block; 15. Connecting hole; 16. Connecting piece; 17. Recessed groove; 18. Through hole; 19. Threaded rod; 20. Threaded sleeve; 21. Airtight door. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0018] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] like Figure 1 and Figure 3 As shown, a safety protection device for tensile testing is used to prevent the splashing of specimen fragments during the tensile testing machine 1. It includes: two protective covers, each rotatably connected to the base of the tensile testing machine 1. When the two protective covers are rotated and closed, they completely cover the working area and hazardous area of ​​the tensile testing machine 1, forming a closed protective space that isolates the testing environment from the external environment. The front of the protective cover has a first opening and closing structure for partially opening the cover to take and put in the specimen. At least one of the two protective covers has a second opening and closing structure on its side, which provides an operating channel during the installation of measuring instruments and maintains the protective function during the test; and a locking structure for reliably locking the protective covers when they are rotated and closed, preventing the two protective covers from separating from each other. The above technical solution provides sufficient operating space without compromising protective performance. By setting a second opening and closing structure on the side of the protective cover, it can be used for quick installation of the extensometer. The first opening and closing structure on the front of the protective cover is used for taking out and placing the sample. The protective cover is designed as a structure that opens in two halves and rotates around an axis. During maintenance, it is only necessary to rotate and open the two halves. For example, rotating 90 degrees can fully expose the entire working area of ​​the tensile testing machine 1, providing maintenance personnel with an unobstructed and spacious operating space. This greatly simplifies the maintenance process and saves time and manpower. Rotating and opening is much faster and less strenuous than disassembling bolts or lifting the heavy overall cover. It avoids the risk of crushing and twisting injuries caused by moving the heavy cover during maintenance. The rotating mechanism is usually more stable and controllable.

[0020] like Figure 4 As shown, in this embodiment, the protective cover includes: a crossbeam and a longitudinal beam, which are spliced ​​together to form a main frame 2 with a hollow structure; and a glass 3, which is disposed in the hollow area of ​​the main frame 2. The above technical solution can ensure that the protective cover is transparent. By using glass 3, it has the advantage of a wide field of vision compared with sheet metal or opaque materials. In order to reduce weight, the main frame 2 is preferably made of aluminum, which is lighter than an all-steel structure and does not require special hoisting equipment.

[0021] like Figure 2 As shown, in this embodiment, the device further includes: two fixed seats 7, which are disposed opposite to each other on the outside of the same protective cover; a rotating shaft 8, whose two ends are respectively fixedly connected to the fixed seats 7; a support plate 9, which is disposed on the side of the base of the tensile testing machine 1; two fixed clamps 10, which are disposed opposite to each other on the same support plate 9; a movable clamp 11, one end of which is rotatably connected to the fixed clamp 10, and the fixed clamp 10 and the movable clamp 11 can fit together after being closed, and a bearing mounting groove 12 is provided at the fitting point; a bearing 13, which is rotatably disposed in the bearing mounting groove 12, and the bearing 13 is rotatably engaged with the recessed groove 17 opened on the outer circumference of the rotating shaft 8; and a limiting structure, which is used to lock the movable clamp 11 and the fixed clamp 10 to prevent them from moving relative to each other. The above technical solution allows the protective cover to be rotatably mounted on the side of the base of the tensile testing machine 1. By using the bearing 13, the resistance during the rotation of the protective cover can be reduced, as well as the wear on the rotating shaft 8 caused by frequent rotation can be reduced, thus improving its service life.

[0022] like Figure 2 As shown, in this embodiment, the limiting structure includes: a fixing block 14, which is disposed at one end where the movable clamp 11 and the fixed clamp 10 are in contact, and the fixing block 14 has a connecting hole 15; and a connector 16, which is adapted to the connecting hole 15. The above technical solution can fix the movable clamp 11 and the fixed clamp 10 to prevent them from opening accidentally. The connecting part 16 can be a bolt.

[0023] like Figure 2 As shown, in this embodiment, the locking structure includes: a threaded rod 19, which is inserted into and pulled into a through hole 18 opened on the surface of the rotating shaft 8; a threaded sleeve 20, which is fixedly mounted on the support plate 9, and the threaded sleeve 20 has an internal thread groove that is threadedly engaged with the threaded rod 19; the threaded rod 19 has a screwing groove at its top end for assisting screwing. The above technical solution can limit the rotation of the rotating shaft 8. When the protective cover is closed, the threaded rod 19 is inserted into the through hole 18 on the surface of the rotating shaft 8, and then the threaded end of the threaded rod 19 is screwed into the internal thread groove of the threaded sleeve 20, thereby completing the axial rotation limit of the rotating shaft 8, ensuring that the protective cover does not rotate accidentally, and improving the reliability of the structure.

[0024] like Figure 3 and Figure 4As shown, in this embodiment, the first opening and closing structure includes: a door frame 4, on which a hollow structure for installing glass 3 is formed; a hinge 5, which is used to rotatably connect the door frame 4 to the main frame 2; and a lock, which is used to lock the door frames 4 on the two protective covers to each other. like Figure 3 and Figure 4 As shown, in this embodiment, the second opening and closing structure includes: a window 6, which is disposed on the side of the main frame 2; a movable hinge; and a sealed door 21, which is fixed to one side of the window 6 by the movable hinge. The above technical solution allows the extensometer to be easily placed into the protective cover through window 6. By opening the door frame 4, the sample can be placed into the clamp of the tensile testing machine 1 inside the protective cover, so that both ends of the sample are fixed by the clamp, or after the test, the broken sample can be removed from the clamp.

[0025] Working principle: When in use, release the lock on the door frame 4, rotate the door frame 4 around the hinge 5 to open the front of the protective cover, fix the two ends of the sample to the two clamps of the tensile testing machine 1 respectively, close the door frame 4 and fix it with the lock. When it is necessary to install the extensometer, open the airtight door 21, and the extensometer can be conveniently placed into the protective cover through the window 6 and installed in the corresponding position. Therefore, it is not necessary to open the entire door frame 4, which is more efficient and safer. During maintenance, rotate the threaded rod 19 to disengage it from the threaded sleeve 20, and remove the threaded rod 19 from the through hole 18 of the rotating shaft 8. Simply rotate the two half-covers open, such as by rotating 90 degrees, to fully expose the working area of ​​the tensile testing machine 1, providing maintenance personnel with an unobstructed and spacious operating space. This greatly simplifies the maintenance process and saves time and manpower.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0027] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A safety protection device for tensile testing, used to stop the splashing of specimen fragments during the test of a tensile testing machine (1), characterized in that, include: Two protective covers are rotatably connected to the base of the tensile testing machine (1). When the two protective covers are rotated and closed, they can completely cover the working area and dangerous range of the tensile testing machine (1) to form a closed protective space that isolates the test environment from the external environment. The front of the protective cover is provided with a first opening and closing structure for partially opening the protective cover to take out and put in the sample. At least one of the two protective covers is provided with a second opening and closing structure on the side. The second opening and closing structure is used to provide an operating channel during the installation of measuring instruments and to maintain the protective function during the test. A locking structure is provided to reliably lock the protective shields as they rotate to close, preventing the two protective shields from separating from each other.

2. The safety protection device for tensile testing according to claim 1, characterized in that, The protective cover includes; The main frame with a hollow structure is formed by splicing the horizontal beams and vertical beams together. (2) Glass (3), which is set in the hollow area of ​​the main frame (2).

3. The safety protection device for tensile testing according to claim 1, characterized in that, The device further includes: Two mounting bases (7) are disposed opposite each other on the outside of the same protective cover; The rotating shaft (8) is fixedly connected to the fixed base (7) at both ends; Support plate (9), which is provided on the side of the base of the tensile testing machine (1); Two fixing clamps (10) are respectively mounted on the same support plate (9); The movable clamp (11) is rotatably connected to the fixed clamp (10) at one end. The fixed clamp (10) and the movable clamp (11) can fit together after being closed, and a bearing mounting groove (12) is provided at the fitting point. The bearing (13) is rotatably disposed in the bearing mounting groove (12), and the bearing (13) is rotatably engaged with the recessed groove (17) opened on the outer circumference of the rotating shaft (8); A limiting structure is used to lock the movable clamp (11) and the fixed clamp (10) to prevent relative movement between them.

4. The safety protection device for tensile testing according to claim 3, characterized in that, The limiting structure includes: A fixing block (14) is provided at one end where the movable clamp (11) and the fixing clamp (10) fit together, and the fixing block (14) has a connecting hole (15). A connector (16) that is adapted to the connecting hole (15).

5. The safety protection device for tensile testing according to claim 4, characterized in that, The locking structure includes: A threaded rod (19) is inserted into and pulled into a through hole (18) on the surface of the rotating shaft (8); A threaded sleeve (20) is fixedly mounted on the support plate (9), and the threaded sleeve (20) has an internal thread groove that is threaded to engage with the threaded rod (19).

6. The safety protection device for tensile testing according to claim 5, characterized in that, The threaded rod (19) has a screwing groove at its top end for assisting in screwing.

7. The safety protection device for tensile testing according to claim 2, characterized in that, The first opening and closing structure includes: Door frame (4), the door frame (4) having a hollow structure on its surface for installing glass (3); Hinges (5) are used to rotatably connect the door frame (4) to the main frame (2); Locks are used to lock the door frames (4) on the two protective covers together.

8. The safety protection device for tensile testing according to claim 2, characterized in that, The second opening and closing structure includes: Window (6), which is set on the side of the main frame (2); movable hinge; A sealed door (21) is fixed to one side of the window (6) by the movable hinge.

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