Building material combustible test sample clamp

Abstract

The utility model discloses a combustible test sample clamp for building materials, which relates to the technical field of performance test of building materials and specifically comprises a main board, a fixed frame and a movable frame, the fixed frame is fixed on one side of the main board, and the other end of the main board is connected with the movable frame through a connecting structure; the fixed frame and the movable frame each comprise a fixed plate, clamping plates are connected to the two ends of the side, away from the main plate, of each fixed plate in a clamped mode, each clamping plate comprises a first pressing plate and a second pressing plate which are alternately arranged, and the first pressing plates and the second pressing plates are each in a semi-cylindrical shape. According to the building material combustible test sample clamp, through the arrangement of the movable frame and the fixed frame, the position of the clamping plate can be changed according to requirements, so that the clamp can adapt to building material combustible test samples of various sizes, the adaptability of the clamp is improved, a first pressing plate and a second pressing plate can form a pipe penetrating rod, and the pipe penetrating rod is convenient to use. The clamp can adapt to the tubular sample, and the adaptability of the clamp is further improved.

Description

Technical Field

[0001] This utility model relates to the field of building material performance testing technology, specifically a sample holder for testing the combustibility of building materials. Background Technology

[0002] The flammability test of building materials involves directly impacting a vertically placed sample with a small flame under conditions without external radiation to determine the flammability of the building product. Flammability testing is a crucial test for determining whether building materials and products meet the requirements of flame-retardant B1 or combustible B2 standards. Clamps are required to hold the test sample during the flammability test.

[0003] In related technologies, GB / T8626 "Test Method for Flammability of Building Materials" requires that the sample holder be composed of two U-shaped stainless steel frames, 15 mm wide and (5±1) mm thick. When loading the sample, the two sample frames are clamped together with screws to prevent the sample from tilting. Since building materials come in various shapes such as plate and tubular, the above-mentioned type of sample holder is mostly suitable for plate-shaped building materials and is not easy to clamp and fix tubular building materials. Moreover, when the two parts of the sample holder are fastened with screws, the disassembly and assembly efficiency of the sample holder is low, which affects the use of the sample holder. Based on this, this application proposes a sample holder for flammability testing of building materials. Utility Model Content

[0004] This utility model provides a sample holder for combustible building materials, which solves the problems mentioned in the background art, such as the sample holder having a single function, difficulty in clamping and fixing tubular samples, and low assembly and disassembly efficiency when the two parts of the sample holder are fastened with screws, which affects the use of the sample holder.

[0005] This utility model provides the following technical solution: a combustible test sample fixture for building materials, comprising a main board, a fixed frame, and a movable frame. The fixed frame is fixed to one side of the main board, and the movable frame is connected to the other end of the main board through a connecting structure. Both the fixed frame and the movable frame include a fixed plate, and clamping plates are snapped onto both ends of the fixed plate away from the main board. The clamping plates include alternating first pressure plates and second pressure plates, and both the first pressure plates and the second pressure plates are semi-cylindrical. A bearing plate is fixedly connected to the end of the second pressure plate away from the main board. A positioning strip is fixed to the outer side of the horizontal end of the clamping plate in the fixed frame, and a positioning groove adapted to the positioning strip is fixed to the outer side of the horizontal end of the clamping plate in the movable frame.

[0006] A positioning block is snapped onto the side of the main board away from the fixed plate. A through hole is provided in the middle of the positioning block. A fixing nut is movably connected to one side of the middle of the positioning block. External threads that are compatible with the fixing nut are provided on the arc-shaped sidewalls of both the first pressure plate and the second pressure plate.

[0007] The connection structure includes a ball screw movably connected to the main board, a gear fixedly connected to one end of the ball screw, a ball nut threadedly connected to the other end of the ball screw, a toothed plate movably connected to the inner cavity of the main board, and a push-pull ring fixedly connected to one end of the toothed plate. The ball nut is fixedly connected to a fixed plate in the movable frame, and the toothed plate meshes with the gear.

[0008] Preferably, a first insertion hole and a second insertion hole are evenly provided on one side of the fixed plate, the second insertion hole is aligned with the first insertion hole, and a post is fixed to one end of both the first pressure plate and the second pressure plate, the post being adapted to both the first insertion hole and the second insertion hole.

[0009] Preferably, the outer diameters of the arc-shaped sidewalls of the first pressure plate and the second pressure plate are the same, the outer diameter of the bearing plate is the same as the outer diameter of the arc-shaped sidewall of the first pressure plate, and the inner diameter of the through hole is larger than the outer diameter of the bearing plate.

[0010] Preferably, a retaining sleeve is fixedly connected to the end of the motherboard away from the fixed plate, and the positioning block engages with the inner cavity of the retaining sleeve.

[0011] Preferably, a connecting block is fixedly connected to the bottom of the push-pull ring, the bottom of the connecting block is fixedly connected to the top of one end of the toothed plate, and a slot is provided at the end of the main plate cavity away from the fixed plate, and the connecting block is movably connected to the cavity of the slot.

[0012] Preferably, the distance between the first and second sockets is twice the distance between the plug and the horizontal end of the first pressure plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The combustible test sample fixture for building materials can convert horizontal pushing and pulling forces into twisting forces that drive the ball screw to rotate by using a connecting structure. That is, it converts rotational motion into horizontal motion. When the position of the moving frame changes, it is easier for the staff to work and can increase the speed of the position change of the moving frame, which facilitates the use of the fixture.

[0015] 2. The combustible test sample fixture for building materials, through the setting of the movable frame and the fixed frame, allows the position of the clamping plate to be changed according to the needs, so that the fixture can adapt to combustible test samples of building materials of various sizes, thus improving the adaptability of the fixture. Furthermore, the first and second pressure plates can form a through-tube rod, so that the fixture can adapt to tubular samples, further improving the adaptability of the fixture. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first embodiment of the structure of this utility model;

[0017] Figure 2 The structure of this utility model Figure 1 Rear view illustration;

[0018] Figure 3 The structure of this utility model Figure 1 Bottom diagram;

[0019] Figure 4 This is a cross-sectional schematic diagram of the mainboard structure of this utility model;

[0020] Figure 5 This is a bottom view of the structural positioning block of this utility model;

[0021] Figure 6 This is a schematic diagram of a second embodiment of the structure of this utility model.

[0022] In the diagram: 1. Main board; 2. Fixed plate; 3. First pressure plate; 4. First insertion hole; 5. Second pressure plate; 7. Bearing plate; 8. Positioning strip; 9. Positioning groove; 10. Ball nut; 11. Push-pull ring; 12. Positioning block; 13. Fixing nut; 14. Sleeve; 15. Gear plate; 16. Gear; 17. Ball screw; 18. Second insertion hole; 19. Slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides a sample holder for testing combustible building materials, including a main board 1, a fixed frame, and a movable frame. A fixed frame is fixed on one side of the main board 1, and a movable frame is connected to the other end of the main board 1 through a connecting structure. The connecting structure includes a ball screw 17 movably connected to the main board 1, a gear 16 fixedly connected to one end of the ball screw 17, a ball nut 10 threadedly connected to the other end of the ball screw 17, a toothed plate 15 movably connected to the inner cavity of the main board 1, and a push-pull ring 11 fixedly connected to one end of the toothed plate 15. The toothed plate 15 meshes with the gear 16, and a connecting block is fixedly connected to the bottom of the push-pull ring 11. The bottom of the connecting block is fixedly connected to the top of one end of the toothed plate 15. A slot 19 is provided on the side wall of the main board 1, and the connecting block is movably connected to the inner cavity of the slot 19. Through the setting of the connecting structure, the user can change the position of the toothed plate 15 by horizontally moving the push-pull ring 11. When the toothed plate 15 moves, it can drive the gear 16 meshing with it to rotate. The gear 16 drives the ball screw 17 fixedly connected to it to rotate. The rotation of the ball screw 17 allows the ball nut 10 threadedly connected to it to move in the direction of the ball screw 17. The ball nut 10 is fixedly connected to the movable frame. When the ball nut 10 moves, it can drive the movable frame to move, changing the distance between the fixed frame and the movable frame, thereby enabling the fixture to clamp or release the building material test sample.

[0025] As described above, when the fixture is in use, the connecting structure can convert the horizontal pushing and pulling force into the twisting force that drives the ball screw 17 to rotate, that is, convert the rotational motion into the horizontal motion. When the position of the moving frame changes, the operator can save effort and increase the speed of the position change of the moving frame, which facilitates the use of the fixture.

[0026] Both the fixed frame and the movable frame include a fixed plate 2. Clamping plates are attached to both ends of the fixed plate 2 on the side furthest from the main plate 1, allowing the sample to be clamped and fixed. The clamping plates include alternating first pressure plates 3 and second pressure plates 5. The first pressure plates 3 and second pressure plates 5 are of the same size and are both semi-cylindrical structures. When the horizontal ends of the first pressure plates 3 and second pressure plates 5 contact each other, they form a cylindrical structure, and the tubular sample can be fitted over this cylindrical structure.

[0027] The second pressure plate 5 is fixedly connected to a support plate 7 at the end away from the main plate 1. The outer diameter of the arc-shaped sidewalls of the first pressure plate 3 and the second pressure plate 5 is the same. The outer diameter of the support plate 7 is the same as the outer diameter of the arc-shaped sidewall of the first pressure plate 3. With the support plate 7, the clamp can support the sample when in use, improving the reliability of the sample being clamped.

[0028] A positioning strip 8 is fixed to the outer side of the horizontal end of the clamping plate in the fixed frame, and a positioning groove 9 adapted to the positioning strip 8 is fixed to the outer side of the horizontal end of the clamping plate in the movable frame. By setting the positioning strip 8, the sample can be limited, so that the positions of samples of the same size on the fixture are consistent, and the test error is reduced.

[0029] With the positioning groove 9, the positioning strip 8 can be inserted into the positioning groove 9, so that the first pressure plate 3 or the second pressure plate 5 with the positioning strip 8 can contact the second pressure plate 5 or the first pressure plate 3 with the positioning groove 9.

[0030] The aforementioned ball nut 10 is fixedly connected to the fixed plate 2 in the movable frame. The fixed plate 2, on the side away from the main plate 1, is evenly provided with a first insertion hole 4 and a second insertion hole 18. The second insertion hole 18 is aligned with the first insertion hole 4. One end of both the first pressure plate 3 and the second pressure plate 5 is fixed with a post. The post is compatible with both the first insertion hole 4 and the second insertion hole 18, and the distance between the first insertion hole 4 and the second insertion hole 18 is twice the distance between the post and the horizontal end of the first pressure plate 3. With this arrangement, when the first pressure plate 3 and the second pressure plate 5 contact, the through-tube formed by the first pressure plate 3 and the second pressure plate 5 can simultaneously engage with the first insertion hole 4 and the second insertion hole 18. Furthermore, the outer surface of the through-tube has external threads.

[0031] A retaining sleeve 14 is fixedly connected to the end of the main board 1 away from the fixed plate 2. The positioning block 12 engages with the inner cavity of the retaining sleeve 14. A through hole is provided in the middle of the positioning block 12, and a fixing nut 13 is movably connected to one side of the middle of the positioning block 12. The arc-shaped sidewalls of both the first pressure plate 3 and the second pressure plate 5 are provided with external threads that are compatible with the fixing nut 13. The inner diameter of the through hole is larger than the outer diameter of the bearing plate 7. The size of the through hole can be set according to requirements and is not limited here. With the setting of the positioning block 12 and the fixing nut 13, when the tubular building material is sleeved on the pipe rod, the positioning block 12 can be used to support and limit the tubular building material, and the fixing nut 13 can be used to fix the position of the positioning block 12.

[0032] As described above, the fixture can be adapted to both tubular and plate-shaped building specimens, improving its adaptability. Furthermore, the position of the clamping plates can be changed, allowing the fixture to accommodate specimens of various sizes, further enhancing its adaptability.

[0033] In summary: When using this building material combustible test sample holder, if the sample used for the building material combustible test is plate-shaped, the shape of the holder should be as follows: Figures 1 to 3As shown, the operator changes the distance between the moving frame and the fixed frame by moving the push-pull ring 11 until the sample can be placed between the fixed frame and the moving frame. The operator places the sample on the clamp in the fixed frame, and the positioning strip 8 contacts the sample to limit the sample. After the sample is placed, the operator moves the push-pull ring 11 in the opposite direction. The push-pull ring 11 drives the toothed plate 15 to move. The toothed plate 15 drives the ball screw 17 to move through the gear 16 that meshes with it. The rotation of the ball screw 17 causes the ball nut 10 to move in the direction of the ball screw 17. The ball nut 10 drives the moving frame to move until the moving frame is in close contact with the sample. The sample used for the combustible building material sample is clamped and fixed by the fixture.

[0034] If the sample used for the combustible test of building materials is a tubular structure, the shape of the fixture is as follows: Figure 6 As shown, after the sample is placed on the tube rod, the positioning block 12 is used to limit the position of the sample, and the fixing nut 13 is used to fix the position of the sample. This fixture achieves the clamping and fixing of the sample.

[0035] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sample holder for combustible building materials, comprising a main board (1), a fixed frame, and a movable frame, characterized in that: A fixed frame is fixed on one side of the main board (1), and a movable frame is connected to the other end of the main board (1) through a connecting structure. Both the fixed frame and the movable frame include a fixed plate (2). Both ends of the fixed plate (2) away from the main board (1) are clamped with clamps. The clamps include alternating first pressure plates (3) and second pressure plates (5). Both the first pressure plates (3) and the second pressure plates (5) are semi-cylindrical. A bearing plate (7) is fixedly connected to the end of the second pressure plate (5) away from the main board (1). A positioning strip (8) is fixed on the outer side of the horizontal end of the clamp in the fixed frame. A positioning groove (9) that matches the positioning strip (8) is fixed on the outer side of the horizontal end of the clamp in the movable frame. The main board (1) is attached to a positioning block (12) on the side away from the fixed plate (2). The positioning block (12) has a through hole in the middle. A fixing nut (13) is movably connected to one side of the middle of the positioning block (12). The arc-shaped sidewalls of the first pressure plate (3) and the second pressure plate (5) are provided with external threads that are compatible with the fixing nut (13). The connection structure includes a ball screw (17) movably connected to the main board (1), a gear (16) fixedly connected to one end of the ball screw (17), a ball nut (10) threadedly connected to the other end of the ball screw (17), a toothed plate (15) movably connected to the inner cavity of the main board (1), and a push-pull ring (11) fixedly connected to one end of the toothed plate (15). The ball nut (10) is fixedly connected to the fixed plate (2) in the movable frame, and the toothed plate (15) meshes with the gear (16).

2. The building material combustible test sample holder according to claim 1, characterized in that: The fixed plate (2) is provided with a first insertion hole (4) and a second insertion hole (18) evenly on one side. The second insertion hole (18) is aligned with the first insertion hole (4). One end of the first pressure plate (3) and the second pressure plate (5) is fixed with a plug. The plug is adapted to both the first insertion hole (4) and the second insertion hole (18).

3. The building material combustible test sample holder according to claim 1, characterized in that: The outer diameters of the arc-shaped sidewalls of the first pressure plate (3) and the second pressure plate (5) are the same, the outer diameter of the bearing plate (7) is the same as the outer diameter of the arc-shaped sidewall of the first pressure plate (3), and the inner diameter of the through hole is greater than the outer diameter of the bearing plate (7).

4. The building material combustible test sample holder according to claim 1, characterized in that: The motherboard (1) is fixedly connected to a sleeve (14) at one end away from the fixed plate (2), and the positioning block (12) is engaged with the inner cavity of the sleeve (14).

5. A sample holder for combustible building materials according to claim 1, characterized in that: The bottom of the push-pull ring (11) is fixedly connected to a connecting block. The bottom of the connecting block is fixedly connected to the top of one end of the toothed plate (15). The inner cavity of the main plate (1) is provided with a slot (19) at the end away from the fixed plate (2). The connecting block is movably connected to the inner cavity of the slot (19).

6. A sample holder for combustible building materials according to claim 2, characterized in that: The distance between the first socket (4) and the second socket (18) is twice the distance between the plug and the horizontal end of the first pressure plate (3).

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