Multi-test-piece wood pin groove pressure-bearing loading device

Abstract

The utility model relates to the field of building wood pressure-bearing experiment devices, in particular to a multi-test-piece wood pin groove pressure-bearing loading device which comprises a testing machine loading base and further comprises a pressurizing frame, a test piece support is fixedly installed at the upper end of the testing machine loading base, a first experiment table is arranged at the top of the test piece support, and a second experiment table is arranged at the lower end of the first experiment table. A second experiment table is arranged on the inner side of the test piece support, wood test piece bodies are arranged on the surfaces of the first experiment table and the second experiment table, mounting pin grooves are formed in the two sides of the surface of the pressurizing frame, and pin groove pressurizing steel bars are arranged in the mounting pin grooves; the first experiment table and the second experiment table facilitate placement of a plurality of wood test pieces, loading frames and test piece supports of different layers are manufactured, loading of different numbers of test pieces is completed, the overall flexibility is good, loading experiments of a plurality of test pieces can be conveniently completed at a time, and the test device can be used for short-term bearing capacity tests and long-term creep tests and is high in practicability. The test efficiency is greatly improved, and the test cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building timber pressure experiment device, especially to a wood pin groove pressure loading device of multiple test pieces. BACKGROUND

[0002] As a kind of natural ecological cycle green building material, engineering wood not only has the advantages of uniform material property, maintains forest benign development, high strength-weight ratio, fast construction, good chloride ion resistance and the like, but also has ultra-high carbon fixation characteristics in line with sustainable development strategy, and has irreplaceability in future construction industry, therefore, in recent years, wood structure has been rapidly developed, and a batch of landmark buildings have been built.

[0003] And modern wood structure is a typical assembly type structure, bolt connection is used in a large number of engineering practices, wood bears local compression of screw rod around screw hole, that is, in pin groove pressure state.To ensure the safety of wood structure, pin groove pressure strength test of wood and wood creep in long-term pin groove pressure state are essential research contents, but in the process of long-term test of wood pin groove pressure, a large number of test pieces are required, usually hundreds, and only one test piece can be loaded at a time by using universal testing machine, which consumes a long time;In order to shorten the test time, multiple loading devices must be used, otherwise, the duration is long, which greatly increases the test cost.

[0004] Therefore, in view of the problems that the existing wood pin groove pressure loading device is mainly single test piece loading, and a large number of loading devices are required in a large number of wood experiments, and the cost is high, a wood pin groove pressure loading device of multiple test pieces is designed, which can complete loading experiment of multiple test pieces at a time, that is, it can be used for short-term bearing capacity test and long-term creep test, greatly improves test efficiency and saves test cost. UTILITY MODEL CONTENTS

[0005] In order to overcome the problems that the existing wood pin groove pressure loading device is mainly single test piece loading, and a large number of loading devices are required in a large number of wood experiments, and the cost is high.

[0006] The technical scheme of the utility model is as follows: a wood pin groove pressure loading device of multiple test pieces, comprising a testing machine loading base, a pressurizing frame, a test piece support fixedly installed at the upper end of the testing machine loading base, a first test bench arranged at the top of the test piece support, a second test bench arranged at the inner side of the test piece support, wood test piece bodies arranged on the surfaces of the first test bench and the second test bench, and the wood test piece bodies are placed on the test benches and aligned with the test benches, pin groove installation grooves are formed at the two sides of the surface of the pressurizing frame, pin groove pressurizing steel rods are arranged in the pin groove installation grooves, and the pin groove pressurizing steel rods are matched with the wood test piece bodies.

[0007] Preferably, after the pin slot pressurized steel rod penetrates the wood test piece body, the two ends thereof extend to the outside of the pressurizing frame through the installation pin slot, so that the pressurizing frame and the pin slot pressurized steel rod form a connection, thereby increasing the pressure on the top of the pressurizing frame, the pin slot pressurized steel rod can pressurize the installation hole in the wood test piece body synchronously, the pressure bearing experiment of the pin slot is realized, the test piece support and the test bench form multiple experimental platforms, the synchronous placement of multiple woods is facilitated, the loading experiment of multiple test pieces can be completed by one loader at one time, the short-term bearing capacity test and the long-term creep test can be realized, the test efficiency is greatly improved, and the test cost is saved.

[0008] As preferred, the test piece support is designed in a frame structure, the width of the test piece support is greater than the width of the pressurizing frame, the second test bench is located on the inner side of the test piece support and is distributed at equal intervals, and the second test bench has multiple structures, so that when the device is manufactured, the number of the second test bench can be adjusted according to the test requirement, and the synchronous work of different numbers of test pieces is facilitated.

[0009] As preferred, the wood test piece body and the first test bench and the second test bench are in one-to-one correspondence, the length of the installation pin slot is greater than 1.5 times the diameter of the pin slot pressurized steel rod, the surface of the wood test piece body is provided with an experimental hole, the experimental hole penetrates the wood test piece body from left to right, and the length of the installation pin slot is greater than the diameter of the pin slot pressurized steel rod, so that when the test hole slot is damaged during pressurization, the pin slot pressurized steel rod moves downward.

[0010] As preferred, the installation pin slots are distributed at equal intervals, the installation pin slots and the wood test piece body are in one-to-one correspondence, and the pin slot pressurized steel rod and the installation pin slot are in sliding connection.

[0011] As preferred, the diameter of the pin slot pressurized steel rod is adapted to the experimental hole, and the pin slot pressurized steel rod and the experimental hole are in sliding connection.

[0012] As preferred, the pressurizing frame is designed in a U-shaped structure, a pressurizing gap is arranged between the bottom of the pressurizing frame and the loading base of the testing machine, and the height of the pressurizing gap is 2 times the diameter of the pin slot pressurized steel rod.

[0013] As preferred, the top of the pressurizing frame is provided with a pressurizing table, and the pressurizing table is connected with the loading end of the testing machine.

[0014] The beneficial effects of the utility model are as follows:

[0015] The wood pin groove pressure loading device for multiple test pieces places the wood test piece body on the experiment table, and installs the pin groove pressure steel rod through the experiment hole, and the two ends of the pin groove pressure steel rod are connected through the installation pin groove and the pressure frame, so that when the top of the pressure frame is under heavy pressure, the pressure is synchronously transmitted to the pin groove pressure steel rod, the wood pin groove is subjected to pressure test, and the first experiment table and the second experiment table facilitate the placement of multiple wood test pieces, and the loading frame and the test piece support of different layers are made, the loading of different numbers of test pieces is completed, the overall flexibility is good, the loading test of multiple test pieces is completed at one time, it can be used for short-term bearing capacity test and long-term creep test, greatly improves the test efficiency and saves the test cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The overall structure schematic diagram of the wood pin groove pressure loading device for multiple test pieces is shown.

[0017] Figure 2 The test piece support structure schematic diagram of the wood pin groove pressure loading device for multiple test pieces is shown.

[0018] Figure 3 The pressure frame structure schematic diagram of the wood pin groove pressure loading device for multiple test pieces is shown.

[0019] Figure 4 The front view structure schematic diagram of the wood pin groove pressure loading device for multiple test pieces is shown.

[0020] The reference signs are explained: 1, test machine loading base; 2, wood test piece body; 21, experiment hole; 3, pressure frame; 4, test piece support; 5, first experiment table; 6, second experiment table; 7, installation pin groove; 8, pin groove pressure steel rod; 9, pressure table. DETAILED DESCRIPTION

[0021] The utility model is further explained in connection with the drawings and examples.

[0022] Please refer to Figures 1-4The utility model provides a kind of embodiment: a kind of wood pin slot pressure loading device of multiple test pieces, including test machine loading base 1, further including pressurizing frame 3, the upper end of test machine loading base 1 is fixedly installed with test piece support 4, the top of test piece support 4 is provided with first experiment table 5, the inboard of test piece support 4 is provided with second experiment table 6, test piece support 4 is frame structure design, the width of test piece support 4 is greater than the width of pressurizing frame 3, second experiment table 6 is located inboard of test piece support 4 and is equally spaced distribution, the surface of first experiment table 5 and second experiment table 6 is provided with wood test piece body 2, the both sides of the surface of pressurizing frame 3 are provided with installation pin slot 7, installation pin slot 7 is provided with pin slot pressurizing steel bar 8, pin slot pressurizing steel bar 8 and wood test piece body 2 are adapted, the top of pressurizing frame 3 is provided with pressurizing table 9, pressurizing table 9 and test machine loading end are connected, test piece support 4 and experiment table form multiple experiment platform, first experiment table 5 is top platform, and second experiment table 6 is installed inboard of test piece support 4, multiple second experiment table 6 forms third and fourth experiment table, and the quantity of second experiment table 6 can be adjusted according to test requirement, the synchronous placement of multiple woods is facilitated, the loading experiment of multiple test pieces can be completed by one loader at a time, it can be used for short-term bearing capacity test, and it can be used for long-term creep test, greatly improve test efficiency, save test cost.

[0023] Please refer to Figure 1 and Figure 2 In the embodiment, wood test piece body 2 and first experiment table 5, second experiment table 6 are one-to-one correspondence, the surface of wood test piece body 2 is provided with experiment hole 21, experiment hole 21 is formed from left to right through wood test piece body 2, the diameter of pin slot pressurizing steel bar 8 and experiment hole 21 is adapted, pin slot pressurizing steel bar 8 and experiment hole 21 are slidingly connected, pin slot pressurizing steel bar 8 is through experiment hole 21 and penetrates wood test piece body 2, and realizes the pressure experiment of pin slot.

[0024] Please refer to Figure 1 , Figure 3 and Figure 4 In the embodiment, installation pin slot 7 is equally spaced distribution, installation pin slot 7 and wood test piece body 2 are one-to-one correspondence, and the length of installation pin slot 7 should be more than 1.5 times of the diameter of pin slot pressurizing steel bar 8, pin slot pressurizing steel bar 8 and installation pin slot 7 are slidingly connected, after pin slot pressurizing steel bar 8 penetrates wood test piece body 2, the both ends of pin slot pressurizing steel bar 8 extend into installation pin slot 7, and are connected with pressurizing frame 3, when pressurizing frame 3 is stressed and moves downward, pressure is transmitted to experiment hole 21 by pin slot pressurizing steel bar 8, and realizes the pressure experiment of pin slot.

[0025] Please refer to Figure 1 and Figure 4In the embodiment, the press frame 3 is designed in a U-shaped structure, a press gap is arranged between the bottom of the press frame 3 and the loading base 1 of the testing machine, the height of the press gap is 2 times the diameter of the pin slot press steel rod 8, and the press frame 3 is suspendedly installed outside the test piece support 4 through the pin slot press steel rod 8, so that when the weight of the top press table 9 increases, the pressure received by the press frame 3 is synchronously transmitted by the pin slot press steel rod 8, and the bearing test is realized.

[0026] In operation, the plurality of wood test piece bodies 2 are first placed on the first test table 5 and the second test table 6, the pin slot press steel rod 8 is penetrated into the experimental hole 21 to connect the pin slot press steel rod 8 and the wood test piece body 2, then the U-shaped press frame 3 is installed outside the test piece support 4, so that the two ends of the pin slot press steel rod 8 extend into the installation slot 7 and are connected with the press frame 3, and the press frame 3 is suspendedly placed, when the weight of the top press table 9 increases, the pressure received by the press frame 3 is synchronously transmitted by the pin slot press steel rod 8, the connection of the pin slot press steel rod 8 and the experimental hole 21 forms a pin slot bearing test, and one loader can complete the loading test of multiple test pieces at one time, that is, it can be used for short-term bearing capacity test and long-term creep test, greatly improving the test efficiency and saving the test cost.

[0027] Through the above steps, the test piece support 4 and the test table form a plurality of experimental platforms, which facilitates the synchronous placement of multiple woods, can realize that one loader can complete the loading test of multiple test pieces at one time, that is, it can be used for short-term bearing capacity test and long-term creep test, greatly improving the test efficiency and saving the test cost, so as to solve the problem that the existing wood pin slot bearing loading device is mostly single test piece loading, resulting in that a large number of wood experiments require more loading devices and have high cost.

Claims

1. A multi-specimen wood pin groove compression loading device comprising a testing machine loading base (1) characterised in that: Also include the pressurized frame (3), the upper end of the test machine loading base (1) is fixedly installed with the test piece support (4), the top of the test piece support (4) is provided with the first experimental table (5), the inner side of the test piece support (4) is provided with the second experimental table (6), the surfaces of the first experimental table (5) and the second experimental table (6) are provided with the wood test piece body (2), the both sides of the surface of the pressurized frame (3) are provided with the installation pin slot (7), the pin slot pressurized steel bar (8) is arranged in the installation pin slot (7), and the pin slot pressurized steel bar (8) is matched with the wood test piece body (2).

2. A multi-specimen wood pin grooving pressure loading device according to claim 1, characterized in that: The test piece support (4) is designed in a frame structure, the width of the test piece support (4) is greater than the width of the pressurized frame (3), and the second experimental table (6) is located on the inner side of the test piece support (4) and is distributed at equal intervals.

3. A multi-specimen wood pin groove compression loading device according to claim 1, wherein: The wood test piece body (2) is one-to-one corresponding to the first experimental table (5) and the second experimental table (6), the surface of the wood test piece body (2) is provided with the experimental hole (21), and the experimental hole (21) penetrates the wood test piece body (2) from left to right.

4. A multiple test piece wood dowel bearing loading apparatus as defined in claim 1 wherein: The installation pin slot (7) is distributed at equal intervals, the installation pin slot (7) is one-to-one corresponding to the wood test piece body (2), and the length of the installation pin slot (7) should be more than 1.5 times the diameter of the pin slot pressurized steel bar (8), and the pin slot pressurized steel bar (8) and the installation pin slot (7) are slidably connected.

5. A multiple test piece wood dowel bearing loading apparatus as defined in claim 3 wherein: The diameter of the pin slot pressurized steel bar (8) is matched with the experimental hole (21), and the pin slot pressurized steel bar (8) and the experimental hole (21) are slidably connected.

6. A multiple test piece wood dowel bearing press loading apparatus as defined in claim 1 wherein: The pressurized frame (3) is designed in a U-shaped structure, and the bottom of the pressurized frame (3) and the test machine loading base (1) are provided with a pressurized gap, and the height of the pressurized gap is 2 times the diameter of the pin slot pressurized steel bar (8).

7. A multiple test piece wood dowel bearing press loading apparatus as defined in claim 1 wherein: The top of the pressurized frame (3) is provided with the pressurized table (9), and the pressurized table (9) is connected with the test machine loading end.

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