A device for testing the bearing capacity of a frame column under low temperature conditions

Abstract

The utility model discloses a kind of frame column pressure-bearing capacity testing devices under low temperature state, belong to cold region frame column compression performance test technical field;Including test box, test box outside is provided with the air conditioning unit that can provide suitable temperature for test box, and test box inside slidingly is provided with the pressure plate that can pressurize frame column assembly;For placing frame column assembly's placing cylinder is located in test box, recess is opened in placing cylinder, and pressure plate below is fixedly connected with the protective cover that can be inserted recess and make placing cylinder be in closed state;Pressure plate is provided with the dust fall spray head of several in protective cover. By being set through placing cylinder, protective cover below pressure plate forms sealed space, can greatly reduce the pollution and damage of dust and fragment to test box inner wall when crumbling, dust fall spray head is simultaneously set in pressure plate, can play the role of quick dust fall.

Description

Technical Field

[0001] This invention provides a device for testing the compressive strength of frame columns under low-temperature conditions, belonging to the technical field of testing the compressive performance of frame columns in cold regions. Background Technology

[0002] Traditional reinforced concrete (RC) frame columns have significant technical limitations under extreme environmental conditions. In frigid regions, ordinary concrete structures face a series of severe challenges, including freeze-thaw cycle damage, salt-freezing erosion, and low-temperature brittleness. Against this backdrop, UHPC-RC composite structures have emerged. By applying UHPC to the most unfavorable parts of the structure, complementing the advantages of ordinary RC, the structural durability, composite section bearing capacity, and crack control capabilities can be significantly improved.

[0003] Currently, the low-temperature compressive strength test for UHPC-RC composite frame columns typically employs an environmental test chamber to simulate low-temperature conditions, applying axial pressure through a hydraulic servo system until the specimen fails. During the test, the environmental chamber must remain sealed to ensure temperature stability, while the press applies pressure to the frame column through the top of the chamber.

[0004] However, the frame columns of the UHPC-RC composite structure will violently collapse under ultimate load, generating a large amount of high-strength debris and dust. This debris and dust splashing within the sealed chamber not only contaminates the inner walls of the test chamber, causing dust dispersion and increasing the difficulty of subsequent cleaning, but the high-speed debris can also easily damage the sensing elements inside the test chamber, such as temperature sensors capable of simulating environmental temperatures, leading to inaccurate subsequent test data. To address these issues, a new low-temperature frame column bearing capacity testing device is needed. Utility Model Content

[0005] The technical problem this invention aims to solve is that during the test of the load-bearing capacity of the frame column at low temperature, the fragments and dust generated by the collapse of the frame column not only contaminate the inner wall of the test chamber, but also easily damage sensing elements such as temperature sensors.

[0006] To address the aforementioned problems, the proposed technical solution is as follows: a frame column bearing capacity testing device under low-temperature conditions, comprising an openable enclosed test chamber, with the frame column assembly located inside the test chamber; an air conditioning unit capable of providing a suitable temperature to the test chamber is installed outside the test chamber, and a pressure plate capable of applying pressure to the frame column assembly is slidably installed inside the test chamber; further comprising:

[0007] The placement cylinder, used to hold the frame column assembly, is located inside the test chamber. The placement cylinder has a groove, and a protective cover that can be inserted into the groove to keep the placement cylinder in a closed state is fixedly connected below the pressure plate. A water tank is provided outside the test chamber, and a connecting pipe that can be inserted into the test chamber is output from the water tank. Several dust suppression nozzles are provided inside the pressure plate and located inside the protective cover, and the connecting pipe is connected to the dust suppression nozzles.

[0008] As an improvement, a hydraulic press is installed inside the test chamber, and a pressure plate is fixedly connected to the working end of the hydraulic press.

[0009] As an improvement, the frame column assembly includes a base plate, columns, and a pressure plate, which are fixedly connected sequentially from bottom to top, and the positions of the pressure plate and the pressure plate correspond.

[0010] As an improvement, the water tank is equipped with a water pump connected to the connecting pipe; the lower surface of the pressure plate is provided with several countersunk holes, and the dust suppression nozzles are located in the countersunk holes.

[0011] As an improvement, a cuboid positioning groove is provided on the inner wall of the test chamber, and a positioning block inserted into the positioning groove is fixedly connected below the placement cylinder.

[0012] As an improvement, a temperature sensor is installed inside the test chamber.

[0013] The beneficial effects of this utility model are:

[0014] 1. The placement cylinder for placing the frame column assembly is located inside the test chamber. The placement cylinder has a groove, and a protective cover that can be inserted into the groove to keep the placement cylinder closed is fixedly connected below the pressure plate. When the pressure plate slides down to apply pressure to the frame column assembly, the protective cover can be inserted into the groove, which greatly increases the sealing of the placement cylinder, thereby ensuring that dust and debris will not cause significant pollution to the test chamber when the frame column assembly breaks.

[0015] 2. Several dust suppression nozzles are installed inside the pressure plate and located within the protective cover, and the connecting pipe is connected to the dust suppression nozzles; by installing dust suppression nozzles inside the pressure plate, when the frame column assembly breaks, the dust suppression nozzles can immediately spray water mist into the placement cylinder, thereby achieving a rapid dust suppression effect, and the water mist is located inside the closed placement cylinder, so it will not cause contamination to the test chamber. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention.

[0017] Figure 2 This is a rear view of the present invention.

[0018] Figure 3 This is a diagram showing the internal structure of the test chamber of this utility model.

[0019] Figure 4 This is an exploded view showing the connection between the placement cylinder and the pressure plate of this utility model.

[0020] Figure 5 This is an exploded view showing the connection between the placement cylinder and the test box of this utility model.

[0021] 1. Test chamber; 2. Temperature sensor; 3. Air conditioning unit; 4. Water tank; 5. Water pump; 6. Connecting pipe; 7. Hydraulic press; 8. Pressure plate; 9. Protective cover; 10. Placement cylinder; 11. Groove; 12. Countersunk hole; 13. Dust suppression nozzle; 14. Column; 15. Pressure plate; 16. Base plate; 17. Positioning groove; 18. Positioning block. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] This utility model provides a device for testing the bearing capacity of a frame column under low-temperature conditions: it includes an openable enclosed test chamber 1, with the frame column assembly located inside the test chamber 1; an air conditioning unit 3 is installed outside the test chamber 1 to provide a suitable temperature for the test chamber 1, and the air conditioning unit 3 can regulate the temperature inside the test chamber 1 to simulate a low-temperature environment. This is existing technology, so its specific structural composition will not be described in detail here. A temperature sensor 2 is installed inside the test chamber 1, and a pressure plate 8 that can apply pressure to the frame column assembly is slidably installed inside the test chamber 1; a hydraulic press 7 is installed inside the test chamber 1, and the pressure plate 8 is fixedly connected to the working end of the hydraulic press 7.

[0024] like Figure 3 As shown, the placement cylinder 10 for placing the frame column assembly is located inside the test chamber 1. A cuboid positioning groove 17 is provided on the inner wall of the test chamber 1. A positioning block 18 is fixedly connected below the placement cylinder 10 and inserted into the positioning groove 17. The positioning groove 17 is designed to facilitate the positioning of the placement cylinder 10 and to facilitate the removal of the placement cylinder 10 after the test. A groove 11 is provided inside the placement cylinder 10. A protective cover 9 is fixedly connected below the pressure plate 8, which can be inserted into the groove 11 to keep the placement cylinder 10 in a closed state. An elastic sealing gasket is provided on the protective cover 9.

[0025] The test chamber 1 is equipped with a water tank 4 on its exterior. A connecting pipe 6, which is inserted into the test chamber 1, is output from the water tank 4. A water pump 5, which is connected to the connecting pipe 6, is installed on the water tank 4. Several dust suppression nozzles 13 are installed inside the pressure plate 8 and located within the protective cover 9. The connecting pipe 6 is a sufficiently long flexible hose, which ensures that the connection between the connecting pipe 6 and the dust suppression nozzles 13 is maintained even when the pressure plate 8 is raised or lowered. Water is supplied to the dust suppression nozzles 13 through the water pump 5 and the connecting pipe 6, so that the dust can be quickly suppressed in the closed placement cylinder 10 after the material is broken up.

[0026] like Figure 4 As shown, the frame column assembly includes a base plate 16, columns 14, and a pressure plate 15. The base plate 16, columns 14, and pressure plate 15 are fixedly connected sequentially from bottom to top, and the pressure plate 15 corresponds to the position of the pressure plate 8, serving to bear the pressure of the pressure plate 8. Several countersunk holes 12 are provided on the lower surface of the pressure plate 8, and dust suppression nozzles 13 are located within the countersunk holes 12. When the pressure plate 8 applies pressure to the pressure plate 15, it will not cause damage to the dust suppression nozzles 13.

[0027] The principle of this utility model

[0028] When using this application, if Figure 4 , 5 As shown, first place the frame column assembly inside the placement cylinder 10, then insert the positioning block 18 into the positioning slot 17, place the entire placement cylinder 10 below the pressure plate 8, and then seal the test chamber 1. Figure 1 , 3 As shown, the air conditioning unit 3 is started to bring the entire test chamber 1 to a suitable temperature. The temperature sensor 2 monitors the temperature inside the test chamber 1, while ensuring that the protective cover 9 is separated from the placement cylinder 10. After a period of time, the hydraulic press 7 is started, causing the pressure plate 8 and the protective cover 9 to move downwards. The pressure plate 8 begins to apply pressure to the pressure plate 15 and the column 14, and the protective cover 9 slides into the groove 11. During the pressure application process by the pressure plate 8, the protective cover 9 and the placement cylinder 10 form a relatively enclosed space. Under extreme conditions, if the frame column collapses, the fragments and dust are confined within this enclosed space, greatly reducing contamination of the test chamber 1. After collapse, the water pump 5 can be started to spray water mist into the placement cylinder 10 through the dust suppression nozzle 13, thereby quickly reducing dust in the placement cylinder 10. After the dust suppression is completed, the hydraulic press 7 can be started to move the pressure plate 8 and the protective cover 9 upward, open the placement cylinder 10, and then the placement cylinder 10 along with the fragments inside the placement cylinder 10 can be taken out from the test box 1.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A frame column bearing capacity testing device under low temperature conditions, comprising an openable closed test chamber (1), wherein the frame column assembly is located inside the test chamber (1); an air conditioning unit (3) capable of providing a suitable temperature for the test chamber (1) is provided outside the test chamber (1), and a pressure plate (8) capable of applying pressure to the frame column assembly is slidably disposed inside the test chamber (1); characterized in that, Also includes: The placement cylinder (10) for placing the frame column assembly is located inside the test chamber (1). The placement cylinder (10) has a groove (11) inside, and a protective cover (9) that can be inserted into the groove (11) to keep the placement cylinder (10) in a closed state is fixedly connected below the pressure plate (8). A water tank (4) is provided outside the test chamber (1), and a connecting pipe (6) that is inserted into the test chamber (1) is output from the water tank (4). Several dust suppression nozzles (13) are provided inside the pressure plate (8) and located inside the protective cover (9), and the connecting pipe (6) is connected to the dust suppression nozzles (13).

2. The frame column bearing capacity testing device under low temperature conditions according to claim 1, characterized in that: The test chamber (1) is equipped with a hydraulic press (7), and the pressure plate (8) is fixedly connected to the working end of the hydraulic press (7).

3. The frame column bearing capacity testing device under low temperature conditions according to claim 1, characterized in that: The frame column assembly includes a base plate (16), a column (14), and a pressure plate (15). The base plate (16), column (14), and pressure plate (15) are fixedly connected from bottom to top, and the pressure plate (15) corresponds to the position of the pressure plate (8).

4. The frame column bearing capacity testing device under low temperature conditions according to claim 1, characterized in that: The water tank (4) is equipped with a water pump (5) that is connected to the connecting pipe (6); the lower surface of the pressure plate (8) is provided with several countersunk holes (12), and the dust suppression nozzle (13) is located in the countersunk holes (12).

5. The frame column bearing capacity testing device under low temperature conditions according to claim 1, characterized in that: The inner wall of the test box (1) is provided with a cuboid positioning groove (17), and a positioning block (18) inserted into the positioning groove (17) is fixedly connected below the placement cylinder (10).

6. The frame column bearing capacity testing device under low temperature conditions according to claim 1, characterized in that: A temperature sensor (2) is installed inside the test chamber (1).

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