A device for testing the tensile strength of plywood

Abstract

The utility model discloses a plywood tensile strength testing device, include: box, two baffle are installed in the box, the hydraulic stem is installed at the top of box, the upper clamp is installed at the bottom of hydraulic stem, the lower clamp is installed in the box, the dust removal subassembly is located in the box, and the dust removal subassembly includes: the air slot, filter frame and fan, the fixed component is located on the upper clamp and lower clamp, and the fixed component includes: the threaded hole, threaded rod and clamping plate. The utility model discloses through the setting of dust removal subassembly, can draw the air in test cavity, and the dust and impurity in the air are intercepted, reduce the pollution of dust to test environment and surrounding environment, secondly, through the setting of fixed component, can increase the friction of plywood test sample, avoid the loosening of threaded rod simultaneously, improve the clamping stability.

Description

Technical Field

[0001] This utility model relates to the field of plywood tensile testing technology, specifically a plywood tensile strength testing device. Background Technology

[0002] As an important wood-based panel material, plywood's mechanical properties, especially tensile strength and static bending strength, are directly related to the safety and service life of the product. Currently, plywood tensile strength testing is usually carried out using a universal testing machine. The sample is clamped by upper and lower clamps, and tensile or bending loads are applied until the sample breaks, thereby determining its ultimate strength.

[0003] However, in existing testing devices, when plywood samples reach their ultimate strength and break or delaminate during testing, the wood fibers are torn and broken, generating a large amount of tiny wood fibers, debris, and other dust that float in the air, polluting the testing environment. Furthermore, long-term inhalation by operators can affect their health. In addition, existing testing devices often use simple screw clamping, which can loosen due to vibration during testing, causing the sample to slip or shift, affecting the accuracy of the test data. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a plywood tensile strength testing device. By setting up a dust removal component, air in the test chamber can be extracted and dust impurities in the air can be intercepted, reducing dust pollution to the test environment and the surrounding environment. By setting up a fixing component, the friction force on the plywood sample can be increased, while preventing the threaded rod from loosening and improving the clamping stability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a plywood tensile strength testing device, comprising:

[0006] The box has two baffles installed inside, a hydraulic rod is installed on the top of the box, an upper clamp is installed at the bottom of the hydraulic rod, and a lower clamp is installed inside the box.

[0007] A dust removal assembly is located inside the housing. The dust removal assembly includes: a ventilation slot, a filter frame, and a fan. Multiple ventilation slots are provided on the baffle. Installation slots are provided on both sides of the housing. A filter frame is provided inside the installation slot. Two fans are installed inside the housing.

[0008] A fixing component is provided on the upper clamp and the lower clamp. The fixing component includes: a threaded hole, a threaded rod, and a clamping plate. Two threaded holes are provided on both the upper clamp and the lower clamp. The threaded holes are threadedly connected to the threaded rod. One end of the threaded rod is rotatably connected to the clamping plate through a bearing.

[0009] Furthermore, the plurality of the air-permeable grooves are evenly arranged and distributed, and the air-permeable grooves are located above the filter frame.

[0010] Furthermore, the filter frame is composed of multiple filter screens, and a pull plate is connected to one side of the filter frame. The pull plate is connected to the housing by screws.

[0011] Furthermore, the output end of the fan protrudes from the outer surface of the housing, and the housing has symmetrically arranged waste troughs inside, with waste frames inside the waste troughs.

[0012] Furthermore, both the upper and lower clamps are U-shaped, and rubber pads are provided on the sides of the clamping plates that are close to each other.

[0013] Furthermore, both the upper and lower clamps are provided with multiple limiting holes, and the multiple limiting holes are symmetrically arranged about the threaded rod. One side of the clamping plate is connected to multiple limiting rods that are adapted to the limiting holes, and a locking nut is threadedly connected to the outer side of the threaded rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] By setting up the dust removal components, air can be extracted from the test chamber and dust impurities in the air can be trapped, reducing dust pollution to the test environment and the surrounding environment. Secondly, by setting up the fixing components, the friction force on the plywood sample can be increased, while preventing the threaded rod from loosening and improving the clamping stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a half-sectional view of the overall structure of this utility model.

[0018] Figure 3 This is a cross-sectional view of the overall structure of this utility model.

[0019] Figure 4 This is a top sectional view of the overall structure of this utility model.

[0020] In the diagram: 1. Box body; 101. Waste trough; 102. Waste frame; 2. Baffle; 201. Ventilation trough; 202. Filter frame; 203. Fan; 3. Hydraulic rod; 4. Upper clamp; 401. Lower clamp; 402. Threaded hole; 403. Threaded rod; 404. Clamping plate; 405. Limiting rod; 406. Limiting hole; 407. Locking nut. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. 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 protection scope of this utility model.

[0022] This application provides a plywood tensile strength testing device, which solves the problems of dust pollution and poor clamping stability in existing testing devices.

[0023] By setting up the dust removal components, air can be extracted from the test chamber and dust impurities in the air can be trapped, reducing dust pollution to the test environment and the surrounding environment. Secondly, by setting up the fixing components, the friction force on the plywood sample can be increased, while preventing the threaded rod from loosening and improving the clamping stability.

[0024] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0025] Reference Figure 1 , Figure 2 and Figure 3 As shown, a plywood tensile strength testing device includes: a housing 1, with two baffles 2 installed inside the housing 1, a hydraulic rod 3 installed on the top of the housing 1, an upper clamp 4 installed at the bottom of the hydraulic rod 3, and a lower clamp 401 installed inside the housing 1; a dust removal component, located inside the housing 1, including: a ventilation groove 201, a filter frame 202, and a fan 203, with multiple ventilation grooves 201 on the baffles 2, mounting grooves on both sides of the housing 1, with filter frames 202 inside the mounting grooves, and two fans 203 installed inside the housing 1; and a fixing component, located on the upper clamp 4 and the lower clamp 401, including: threaded holes 402, threaded rods 403, and clamping plates 404, with two threaded holes 402 on both the upper clamp 4 and the lower clamp 401, the threaded holes 402 being threadedly connected to the threaded rods 403, and one end of the threaded rods 403 being rotatably connected to the clamping plates 404 via bearings.

[0026] During the tensile strength test of plywood, a sample is cut from the plywood to be tested and processed into a sample that meets the test standard. Then, the plywood of the standard sample is placed between the lower clamp 401 and the upper clamp 4, and the top and bottom outer sides of the plywood are clamped and fixed by the fixing component. Then, the upper clamp 4 is moved upward by the hydraulic rod 3 to conduct the tensile test on the plywood. When the applied load reaches the ultimate strength of the plywood, the specimen will suddenly break or delaminate. During this process, the wood fibers will be torn and broken, generating tiny wood fibers, debris and other impurities and dust that will be scattered. At this time, the dust removal component is set to extract and filter the tiny wood fibers, debris and other impurities and dust floating in the air to prevent workers from inhaling the dust and affecting their health.

[0027] Combination Figure 3 As shown, further, multiple air vents 201 are evenly arranged and distributed, and the air vents 201 are located above the filter frame 202. The filter frame 202 is composed of multiple filter screens. A pull plate is connected to one side of the filter frame 202. The pull plate is connected to the housing 1 by screws. The output end of the fan 203 protrudes from the outer surface of the housing 1.

[0028] The chamber 1 is divided into a test chamber and two dust removal chambers by two baffles 2. During the test, the fan 203 draws the gas inside the dust removal chamber to the outside, causing the air pressure inside the dust removal chamber to drop and generate suction. The suction is applied to the ventilation groove 201, so that the gas inside the test chamber is drawn into the dust removal chamber by the ventilation groove 201. The dust inside the test chamber is carried into the dust removal chamber with the gas, and then the dust in the air is intercepted by the filter frame 202 composed of filter screens.

[0029] Reference Figure 3 As shown, the box 1 has symmetrically arranged waste troughs 101 inside, and waste frames 102 are provided in the waste troughs 101. After the test is completed, the broken plywood can be removed, and the wood chips and other impurities that fall off after the break can be swept into the waste troughs 101 and collected by the waste frames 102. After all the plywood has been tested, the waste frames 102 can be removed and the debris inside can be cleaned.

[0030] Reference Figure 3 As shown, both the upper clamp 4 and the lower clamp 401 are U-shaped. Rubber pads are provided on the sides of the clamping plates 404 that are close to each other. The rubber pads can increase the friction between the plywood sample and the clamps and improve the stability of the clamping. Both the upper clamp 4 and the lower clamp 401 are provided with multiple limiting holes 406, and the multiple limiting holes 406 are symmetrically arranged about the threaded rods 403. Multiple limiting rods 405 that are adapted to the limiting holes 406 are connected to one side of the clamping plate 404. Locking nuts 407 are threadedly connected to the outer side of the threaded rods 403.

[0031] When the plywood is positioned between the upper clamp 4 and the lower clamp 401, rotating the threaded rod 403 causes it to engage with the threaded hole 402, which in turn moves the clamping plate 404 towards the plywood, clamping and securing it. Then, rotating the locking nut 407 locks the threaded rod 403, preventing it from loosening and shifting backward during testing, which could lead to unstable clamping of the plywood sample and affect test data. The limiting rod 405 and the limiting hole 406 limit the direction of movement of the clamping plate 404.

[0032] The main controller is mounted on the surface of the enclosure 1. All electrical components mentioned in the text are electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that is used for control. The existing publicly available power connection technology will not be described in detail in the text.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A plywood tensile strength testing device, characterized in that, include: Box (1), two baffles (2) are installed inside the box (1), a hydraulic rod (3) is installed on the top of the box (1), an upper clamp (4) is installed at the bottom of the hydraulic rod (3), and a lower clamp (401) is installed inside the box (1); A dust removal assembly is provided inside the housing (1). The dust removal assembly includes: a ventilation slot (201), a filter frame (202), and a fan (203). Multiple ventilation slots (201) are provided on the baffle (2). Installation slots are provided on both sides of the housing (1). A filter frame (202) is provided inside the installation slot. Two fans (203) are installed inside the housing (1). A fixing component is provided on the upper clamp (4) and the lower clamp (401). The fixing component includes: a threaded hole (402), a threaded rod (403) and a clamping plate (404). The upper clamp (4) and the lower clamp (401) each have two threaded holes (402). The threaded holes (402) are threadedly connected to the threaded rod (403). One end of the threaded rod (403) is rotatably connected to the clamping plate (404) through a bearing.

2. The plywood tensile strength testing device according to claim 1, characterized in that, The multiple air vents (201) are evenly arranged and distributed, and the air vents (201) are located above the filter frame (202).

3. The plywood tensile strength testing device according to claim 1, characterized in that, The filter frame (202) is composed of multiple filter screens. A pull plate is connected to one side of the filter frame (202), and the pull plate is connected to the housing (1) by screws.

4. The plywood tensile strength testing device according to claim 1, characterized in that, The output end of the fan (203) protrudes from the outer surface of the housing (1). The housing (1) has symmetrically arranged waste troughs (101) inside, and waste frames (102) are provided inside the waste troughs (101).

5. The plywood tensile strength testing device according to claim 1, characterized in that, Both the upper clamp (4) and the lower clamp (401) are U-shaped, and rubber pads are provided on the sides of the clamping plates (404) that are close to each other.

6. The plywood tensile strength testing device according to claim 1, characterized in that, The upper clamp (4) and the lower clamp (401) are provided with multiple limiting holes (406), and the multiple limiting holes (406) are symmetrically arranged about the threaded rod (403). Multiple limiting rods (405) that are adapted to the limiting holes (406) are connected to one side of the clamping plate (404). A locking nut (407) is threaded to the outside of the threaded rod (403).

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