Device for testing fracture toughness of refractory material

Abstract

The utility model discloses a refractory material fracture toughness testing device which comprises a rack, the bottom of the rack is fixedly connected with a fixing block, the front end and the rear end of each of the two sides of the fixing block are fixedly connected with a limiting rod, the other end of each limiting rod is fixedly connected with the inner wall of the rack, the surface of each limiting rod is sleeved with a connecting plate, and the connecting plate is fixedly connected with the rack. A hydraulic telescopic rod is fixedly connected to the top of one side of the connecting plate, the other end of the hydraulic telescopic rod is fixedly connected with the inner wall of the rack, mounting plates are fixedly connected to the front end and the rear end of the side, away from the hydraulic telescopic rod, of the connecting plate, and a detection sample is arranged among the four mounting plates; the bottom of the detection sample is in contact with the top of the fixing block, pin holes are formed in the surface of the mounting plate and the tops of the two sides of the detection sample, and pin rods are arranged in inner cavities of the pin holes. By adopting the equipment, the work of efficiently and quickly testing the fracture toughness of the refractory material can be realized, and the stability of a sample in the test work can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of refractory materials, in particular to a refractory material fracture toughness testing device. Background Art

[0002] Fracture toughness is the impedance value of a material when a crack or crack-like defect occurs in a specimen or component and the material no longer breaks rapidly with increasing load, i.e., when so-called unstable fracture occurs. Such fracture toughness value can be expressed by a single parameter describing the mechanical state of the crack tip, such as energy release rate g, stress intensity factor K, crack tip opening displacement CTOD and J integral. When preparing refractory materials, a fracture toughness test device is needed to perform fracture toughness testing on them.

[0003] Existing testing institutions all perform fracture toughness tests through tensile actuation. During the test, the rear section of the sample is free and has poor stability, so it is necessary to design a fracture toughness testing device with high stability. Utility Model Content

[0004] The utility model aims to provide a refractory fracture toughness testing device, which has the advantage of being easy to use and solves the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a refractory fracture toughness testing device, comprising a frame, a fixed block is fixedly connected to the bottom of the frame, both front and rear ends of the two sides of the fixed block are fixedly connected to limit rods, the other end of the limit rod is fixedly connected to the inner wall of the frame, a connecting plate is sleeved on the surface of the limit rod, a hydraulic telescopic rod is fixedly connected to the top of one side of the connecting plate, the other end of the hydraulic telescopic rod is fixedly connected to the inner wall of the frame, and both front and rear ends of the connecting plate away from the hydraulic telescopic rod are fixedly connected to the mounting plate. A mounting plate, a test sample is arranged between the four mounting plates, the bottom of the test sample contacts the top of the fixed block, the surface of the mounting plate and the top of both sides of the test sample are provided with pin holes, the inner cavity of the pin hole is provided with a pin rod, both ends of the surface of the pin rod are provided with a limit hole, the inner cavity of the limit hole is provided with a plug, the surface of the plug and both ends of the pin rod are provided with a receiving hole, the inner cavity of the receiving hole on the surface of the pin rod is provided with a limit pin, the surface of the limit pin is sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the surface of the pin rod and the limit pin.

[0006] Preferably, a hydraulic oil tank is fixedly connected to the bottom of the frame, and a pilot valve is connected to the bottom of the hydraulic oil tank. Both ends of the pilot valve are connected to the surface of the hydraulic telescopic rod through a hose.

[0007] Preferably, the four corners of the bottom of the frame are fixedly connected with supporting legs, and the bottoms of the supporting legs are provided with anti-slip grooves.

[0008] Preferably, a controller is fixedly connected to the front end of the bottom of the rack, and the controller is electrically connected to the electrical equipment through a wire.

[0009] Preferably, a rubber pad is fixedly connected to the top of the fixing block, and anti-slip grooves are provided on the top of the rubber pad.

[0010] Preferably, sliding holes are provided at both the front and rear ends of the bottom of one side of the surface of the connecting plate, and the sliding holes are slidably connected to the limiting rod.

[0011] Preferably, the inner cavity of the limiting hole is provided with a groove, and the end of the limiting pin away from the spring extends to the inner cavity of the groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model places the test sample on the top of the fixed block and between the four mounting plates, then inserts the pin into the inner cavity of the pin hole, and inserts the plug into the inner cavity of the limit hole, and then uses the elasticity of the spring to insert the limit pin into the inner cavity of the accommodating hole opened on the surface of the plug, so as to complete the fixation of the test sample, and then controls the oil output in the pilot valve by the controller to control the contraction amount of the hydraulic telescopic rod, so as to realize the control of the pulling force, and realizes the fracture toughness test of the test sample by controlling the pulling force of the hydraulic telescopic rod. By adopting this equipment, the fracture toughness test of refractory materials can be realized efficiently and quickly, and the stability of the sample during the test can be guaranteed.

[0014] 2. The utility model can ensure the stability of the equipment by providing outriggers, and can achieve automatic control by providing a controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a right side view schematic diagram of the structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the connection structure between the pin rod and the limit pin of the utility model.

[0018] In the figure: 1. frame; 2. fixing block; 3. limit rod; 4. connecting plate; 5. hydraulic telescopic rod; 6. mounting plate; 7. test sample; 8. pin rod; 9. limit hole; 10. latch; 11. receiving hole; 12. limit pin; 13. spring; 14. hydraulic oil tank; 15. outrigger; 16. controller. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The components of the present invention are all common standard components or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0021] See also Figure 1-3 A refractory fracture toughness testing device comprises a frame 1, a fixed block 2 is fixedly connected to the bottom of the frame 1, both front and rear ends of both sides of the fixed block 2 are fixedly connected to limit rods 3, the other end of the limit rod 3 is fixedly connected to the inner wall of the frame 1, a connecting plate 4 is sleeved on the surface of the limit rod 3, a hydraulic telescopic rod 5 is fixedly connected to the top of one side of the connecting plate 4, the other end of the hydraulic telescopic rod 5 is fixedly connected to the inner wall of the frame 1, the front and rear ends of the connecting plate 4 away from the side of the hydraulic telescopic rod 5 are fixedly connected to the mounting plate 6, a test sample 7 is arranged between the four mounting plates 6, the bottom of the test sample 7 contacts the top of the fixed block 2, and the mounting plate 6 Pin holes are provided on the surface and the top of both sides of the test sample 7, a pin rod 8 is provided in the inner cavity of the pin hole, limiting holes 9 are provided at both ends of the surface of the pin rod 8, a plug 10 is provided in the inner cavity of the limiting hole 9, and a receiving hole 11 is provided on the surface of the plug 10 and both ends of the pin rod 8, a limiting pin 12 is provided in the inner cavity of the receiving hole 11 on the surface of the pin rod 8, a spring 13 is sleeved on the surface of the limiting pin 12, and the two ends of the spring 13 are fixedly connected to the surfaces of the pin rod 8 and the limiting pin 12 respectively. By adopting the present equipment, efficient and fast fracture toughness test of refractory materials can be achieved, and the stability of the sample during the test can be guaranteed.

[0022] The bottom of the frame 1 is fixedly connected with a hydraulic oil tank 14 , and the bottom of the hydraulic oil tank 14 is connected with a pilot valve, and both ends of the pilot valve are connected with the surface of the hydraulic telescopic rod 5 through a hose.

[0023] The four corners of the bottom of the frame 1 are fixedly connected with supporting legs 15, and the bottom of the supporting legs 15 is provided with anti-slip grooves. By providing the supporting legs 15, the stability of the device can be guaranteed.

[0024] A controller 16 is fixedly connected to the front end of the bottom of the rack 1, and the controller 16 is electrically connected to the electrical equipment through a wire. By setting the controller 16, automatic control can be achieved.

[0025] A rubber pad is fixedly connected to the top of the fixing block 2, and an anti-slip pattern is arranged on the top of the rubber pad.

[0026] Sliding holes are provided at both the front and rear ends of the bottom of one side of the surface of the connecting plate 4 , and the sliding holes are slidably connected to the limiting rod 3 .

[0027] The inner cavity of the limiting hole 9 is provided with a groove, and one end of the limiting pin 12 away from the spring 13 extends to the inner cavity of the groove.

[0028] The control method of the present invention is to automatically control through the controller 16. The control circuit of the controller 16 can be realized by simple programming by technicians in this field, which belongs to the common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and circuit connection in detail.

[0029] When in use, the test sample 7 is placed on the top of the fixed block 2 and between the four mounting plates 6, and then the pin rod 8 is inserted into the inner cavity of the pin hole, and the plug 10 is inserted into the inner cavity of the limiting hole 9, and then the limiting pin 12 is inserted into the inner cavity of the accommodating hole 11 opened on the surface of the plug 10 through the elasticity of the spring 13, so that the fixation of the test sample 7 can be completed, and then the oil output in the pilot valve can be controlled by the controller 16 to control the contraction amount of the hydraulic telescopic rod 5, so that the pulling force can be controlled. By controlling the pulling force of the hydraulic telescopic rod 5, the fracture toughness test of the test sample 7 can be realized.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A refractory fracture toughness testing device, comprising a frame (1), characterized in that: The bottom of the frame (1) is fixedly connected to a fixing block (2), and both front and rear ends of both sides of the fixing block (2) are fixedly connected to limit rods (3), and the other end of the limit rod (3) is fixedly connected to the inner wall of the frame (1). A connecting plate (4) is sleeved on the surface of the limit rod (3), and the top of one side of the connecting plate (4) is fixedly connected to a hydraulic telescopic rod (5), and the other end of the hydraulic telescopic rod (5) is fixedly connected to the inner wall of the frame (1). The front and rear ends of the connecting plate (4) away from the hydraulic telescopic rod (5) are fixedly connected to mounting plates (6), and a test sample (7) is arranged between the four mounting plates (6). The bottom of the test sample (7) The mounting plate (6) is in contact with the top of the fixed block (2). Pin holes are provided on the surface of the mounting plate (6) and on the tops of both sides of the test sample (7). A pin rod (8) is provided in the inner cavity of the pin hole. Limiting holes (9) are provided on both ends of the surface of the pin rod (8). A latch pin (10) is provided in the inner cavity of the limiting hole (9). Receiving holes (11) are provided on the surface of the latch pin (10) and on both ends of the pin rod (8). A limiting pin (12) is provided in the inner cavity of the receiving hole (11) on the surface of the pin rod (8). A spring (13) is sleeved on the surface of the limiting pin (12). The two ends of the spring (13) are fixedly connected to the surfaces of the pin rod (8) and the limiting pin (12) respectively.

2. A refractory fracture toughness testing device according to claim 1, characterized in that: The bottom of the frame (1) is fixedly connected to a hydraulic oil tank (14), the bottom of the hydraulic oil tank (14) is connected to a pilot valve, and both ends of the pilot valve are connected to the surface of the hydraulic telescopic rod (5) through a hose.

3. A refractory fracture toughness testing device according to claim 1, characterized in that: The four corners of the bottom of the frame (1) are all fixedly connected with supporting legs (15), and the bottoms of the supporting legs (15) are provided with anti-slip grooves.

4. A refractory fracture toughness testing device according to claim 1, characterized in that: A controller (16) is fixedly connected to the front end of the bottom of the frame (1), and the controller (16) is electrically connected to the electrical equipment via a wire.

5. A refractory fracture toughness testing device according to claim 1, characterized in that: A rubber pad is fixedly connected to the top of the fixing block (2), and anti-slip grooves are provided on the top of the rubber pad.

6. A refractory fracture toughness testing device according to claim 1, characterized in that: Sliding holes are provided at both the front and rear ends of the bottom of one side of the surface of the connection plate (4), and the sliding holes are slidably connected to the limiting rod (3).

7. A refractory fracture toughness testing device according to claim 1, characterized in that: The inner cavity of the limiting hole (9) is provided with a groove, and one end of the limiting pin (12) away from the spring (13) extends to the inner cavity of the groove.

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