Rock triaxial fracturing experimental apparatus

Abstract

The utility model discloses a rock triaxial fracturing experimental apparatus, which comprises a box body and a box door, the front surface of the box body is open, the box door is hinged to the front surface of the box body, a top hydraulic rod is vertically arranged on the upper surface of the box body, side hydraulic rods are arranged on the two sides of the box body, a lower pressing plate is arranged at the telescopic rod end of the top hydraulic rod, and the lower pressing plate is hinged to the box door. A side pressing plate is arranged at the telescopic rod end of the side hydraulic rod, and the lower pressing plate and the side pressing plate are both located in the box body. A bottom support is vertically arranged on the inner bottom face of the box body, a pressure sensor is arranged on the upper surface of the bottom support, a pressure plate is arranged on the upper surface of the pressure sensor, and the lower pressing plate and the pressure plate are vertically aligned. According to the utility model, the box body and the box door form a closed whole body and are firmer, and the box door is firmly mounted on the box body, so that when a rock sample is crushed, the box door cannot be damaged by splashed small stones, and a detector can observe pictures shot by the first camera and the second camera through the display screen.

Description

Technical Field

[0001] The utility model relates to the technical field of rock fracturing detection, and specifically relates to a rock triaxial fracturing experiment device. Background Technique

[0002] During the oil extraction process, the rocks under the oil well are under high temperature and high pressure. When the rocks are subjected to high pressure, cracks will occur in the rocks. It is extremely dangerous to carry out oil extraction in an oil well with cracks. Therefore, it is necessary to determine the ultimate pressure of underground extraction and the pressure resistance of rock samples, so as to scientifically formulate an extraction plan. The pressure resistance of the rocks needs to send the rock samples to the laboratory for testing to know the pressure resistance performance of the rocks. In the existing common rock pressure resistance detection, a pressing plate moving downward is used to press the rock sample, and during the pressing process, the pressure data is recorded in real time until the rock sample is fractured.

[0003] However, for the convenience of observing the situation of the rock being pressed, a large transparent observation panel is usually arranged on the front of the detection device. When the rock breaks, the flying debris will impact the observation panel with a high probability, and in serious cases, the panel will be broken.

[0004] In view of the above problems, the present utility model is proposed. Content of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a rock triaxial fracturing experiment device for solving the problems mentioned in the background technique.

[0006] To solve the above technical problems, the present utility model provides the following technical solutions.

[0007] The present utility model provides a rock triaxial fracturing experiment device, including a box body and a box door. The front of the box body is open, the box door is hinged to the front of the box body, a top hydraulic rod is vertically arranged on the upper surface of the box body, side hydraulic rods are arranged on both sides of the box body, a lower pressing plate is arranged at the telescopic rod end of the top hydraulic rod, a side pressing plate is arranged at the telescopic rod end of the side hydraulic rod, and both the lower pressing plate and the side pressing plate are located inside the box body;

[0008] A bottom support is vertically arranged on the inner bottom surface of the box body, a pressure sensor is arranged on the upper surface of the bottom support, a pressure plate is arranged on the upper surface of the pressure sensor, and the lower pressing plate and the pressure plate are vertically aligned;

[0009] A concave cavity is arranged at the center of the back surface of the box door, a first camera is arranged at the center of the inner back surface of the concave cavity, a second camera is arranged at the center of the inner back surface of the box body, and both the first camera and the second camera are directed at the central position inside the box body.

[0010] Preferably, anti-slip patterns are provided on the surfaces of the lower pressing plate, side pressing plates and pressure plate that are close to the center inside the box body.

[0011] Preferably, a circular clamping groove is further provided on the front surface of the box body. The clamping groove is located around the entrance of the front door of the box body. A circular protruding strip is provided on the back surface of the box door. The protruding strip is located around the concave cavity. The protruding strip is adapted to the clamping groove.

[0012] Preferably, a reinforcing rib plate is provided between the surface of the cylinder body of the top hydraulic rod and the upper surface of the box body, and a reinforcing rib plate is provided between the surface of the cylinder body of the side hydraulic rod and the outer side surface of the box body.

[0013] Preferably, two screw holes are symmetrically arranged up and down at the left position on the front surface of the box body, and two through holes are symmetrically arranged up and down at the left position on the front surface of the box door. The through holes face the screw holes.

[0014] Preferably, a handle is further provided at the left position on the front surface of the box door.

[0015] Preferably, the two side pressing plates are aligned left and right, and the lower pressing plate, pressure plate and two side pressing plates are all aligned.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] Vertically place the rock sample on the pressure plate, and the two opposite side pressing plates move towards each other and are fixed on both sides of the rock sample, so that the two side pressing plates fix the rock sample; at this time, close the box door, and then pass a bolt through the through hole and screw it into the screw hole, so that the box door is firmly closed;

[0018] When the box door is closed, the first camera and the second camera just face the rock sample and transmit the captured images to an external display screen. The top hydraulic rod moves downward, which can squeeze the rock sample. The pressure sensor under the pressure plate can detect the pressure data in real time and transmit it to the external display screen. As the lower pressing plate continues to move downward, the rock sample will be fractured and broken, and the external display screen shows the maximum pressure value detected by the pressure sensor;

[0019] The box body and the box door form a sealed and relatively firm whole, and the box door is firmly installed on the box body. When the rock sample is broken, the flying small stones will not damage the box door. The tester can observe the images captured by the first camera and the second camera through the display screen;

[0020] The first camera is detachably installed on the box door through bolts, and the second camera is detachably installed in the box body through bolts. The shooting lenses of the first camera and the second camera are small and have protective shells, so the probability of being hit by gravel is greatly reduced. Description of the Drawings

[0021] Figure 1 This is the overall three-dimensional view of the present utility model;

[0022] Figure 2 This is the three-dimensional view when the box door of the present utility model is opened;

[0023] Figure 3 This is the three-dimensional view of the box body of the present utility model.

[0024] In the figure: 1. Box body; 11. Top hydraulic rod; 111. Lower pressure plate; 12. Side hydraulic rod; 121. Side pressure plate; 13. Bottom support; 131. Pressure plate; 14. Card slot; 15. Anti-slip pattern; 16. Second camera; 17. Screw hole; 2. Box door; 21. Rib; 22. Concave cavity; 23. First camera; 24. Handle; 25. Through hole. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0027] As Figures 1-3 shown, a rock triaxial fracturing experimental apparatus includes a box body 1 and a box door 2. The front of the box body 1 is open, the box door 2 is hinged to the front of the box body 1. A top hydraulic rod 11 is vertically arranged on the upper surface of the box body 1, side hydraulic rods 12 are arranged on both sides of the box body 1. The telescopic rod end of the top hydraulic rod 11 is provided with a lower pressure plate 111, and the telescopic rod end of the side hydraulic rod 12 is provided with a side pressure plate 121. Both the lower pressure plate 111 and the side pressure plate 121 are located inside the box body 1. The expansion and contraction of the top hydraulic rod 11 drives the lower pressure plate 11 to move up and down, and the side hydraulic rod 12 drives the side pressure plate 121 to move left and right;

[0028] A vertical bottom support 13 is arranged on the inner bottom surface of the box body 1. A pressure sensor is arranged on the upper surface of the bottom support 13, and a pressure plate 131 is arranged on the upper surface of the pressure sensor. The lower pressure plate 111 and the pressure plate 121 are vertically aligned. When the lower pressure plate 111 moves downward to squeeze the rock sample, the rock sample can press down on the pressure plate 131, and the pressure sensor can detect the pressure received by the rock sample;

[0029] A concave cavity 22 is provided at the center of the back surface of the box door 2, and a first camera 23 is provided at the center of the inner back surface of the concave cavity 22. A second camera 16 is provided at the center of the inner back surface of the box body 1. Both the first camera 23 and the second camera 16 face the central position inside the box body 1. That is, during the process of the lower pressing plate 111 pressing the rock sample downward, the first camera 23 and the second camera 16 can capture the pictures of the rock sample being pressed in real time.

[0030] Anti-slip patterns 15 are provided on the surfaces of the lower pressing plate 111, the side pressing plates 121, and the pressure plate 131 close to the central position inside the box body 1. In this way, when the rock sample is located between the lower pressing plate 111, the two side pressing plates 121, and the pressure plate 131, it is not easy to slip.

[0031] A circular card slot 14 is also provided on the front surface of the box body 1. The card slot 14 is located around the entrance of the main door of the box body 1. A circular convex strip 21 is provided on the back surface of the box door 2. The convex strip 21 is located around the concave cavity 22, and the convex strip 21 is adapted to the card slot 14.

[0032] Reinforcing rib plates are provided between the cylinder surfaces of the top hydraulic rod 11 and the upper surface of the box body 1, and between the cylinder surfaces of the side hydraulic rods 12 and the outer side surfaces of the box body 1.

[0033] Two screw holes 17 are symmetrically arranged up and down at the left position on the front surface of the box body 1. Two through holes 25 are symmetrically arranged up and down at the left position on the front surface of the box door 2. The through holes 25 face the screw holes 17. Bolts are used to pass through the through holes 25 and screw into the screw holes 17 to firmly install the box door 2 on the front surface of the box body 1.

[0034] A handle 24 is also provided at the left position on the front surface of the box door 2.

[0035] The two side pressing plates 121 are aligned left and right, and the lower pressing plate 111, the pressure plate 131, and the two side pressing plates 121 are all aligned.

[0036] In summary: The rock sample is vertically placed on the pressure plate 131, and the two opposite side pressing plates 121 move towards each other and are fixed on both sides of the rock sample. In this way, the two side pressing plates 121 fix the rock sample; at this time, the box door 2 is closed, and then bolts are used to pass through the through holes 25 and screw into the screw holes 17, so that the box door 2 is firmly closed;

[0037] When the box door 2 is closed, the first camera 23 and the second camera 16 just face the rock sample, and the captured pictures are transmitted to an external display screen. The top hydraulic rod 11 moves downward and can press the rock sample. The pressure sensor below the pressure plate 131 can detect the pressure data in real time and transmit it to the external display screen. As the lower pressing plate 111 continues to move downward, the rock sample will be fractured and broken, and the external display screen shows the maximum pressure value detected by the pressure sensor;

[0038] The box body 1 and the box door 2 form a sealed and relatively firm whole, and the box door 2 is firmly installed on the box body 1. When the rock sample is broken, the flying small stones will not damage the box door 2. The tester can observe the images captured by the first camera 23 and the second camera 16 through the display screen;

[0039] The first camera 23 is detachably installed on the box door 2 by bolts, and the second camera 16 is detachably installed in the box body 1 by bolts. The shooting lenses of the first camera 23 and the second camera 16 are small and have protective shells, so the probability of being hit by gravel is greatly reduced.

[0040] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A kind of experimental equipment for triaxial fracturing of rock, characterized in that: It includes a box body (1) and a box door (2). The front of the box body (1) is open. The box door (2) is hinged to the front of the box body (1). A top hydraulic rod (11) is vertically arranged on the upper surface of the box body (1). Side hydraulic rods (12) are arranged on both sides of the box body (1). The telescopic rod end of the top hydraulic rod (11) is provided with a lower pressing plate (111). The telescopic rod end of the side hydraulic rod (12) is provided with a side pressing plate (121). The lower pressing plate (111) and the side pressing plate (121) are both located inside the box body (1). A bottom support (13) is vertically arranged on the inner bottom surface of the box body (1). A pressure sensor is arranged on the upper surface of the bottom support (13). A pressure plate (131) is arranged on the upper surface of the pressure sensor. The lower pressing plate (111) and the pressure plate (131) are vertically aligned. A concave cavity (22) is arranged at the center of the back surface of the box door (2). A first camera (23) is arranged at the center of the inner back surface of the concave cavity (22). A second camera (16) is arranged at the center of the inner back surface of the box body (1). Both the first camera (23) and the second camera (16) face the central position inside the box body (1).

2. The rock triaxial fracturing experimental equipment according to claim 1, characterized in that: Anti-slip patterns (15) are arranged on the surfaces of the lower pressing plate (111), the side pressing plate (121) and the pressure plate (131) close to the central position inside the box body (1).

3. The rock triaxial fracturing experimental equipment according to claim 1, characterized in that: A circular card slot (14) is also arranged on the front of the box body (1). The card slot (14) is located around the entrance of the front door of the box body (1). A circular convex strip (21) is arranged on the back surface of the box door (2). The convex strip (21) is located around the concave cavity (22). The convex strip (21) is adapted to the card slot (14).

4. A kind of rock triaxial fracturing experimental equipment according to claim 1, characterized in that: Reinforcing rib plates are arranged between the cylinder surface of the top hydraulic rod (11) and the upper surface of the box body (1). Reinforcing rib plates are arranged between the cylinder surface of the side hydraulic rod (12) and the outer side surface of the box body (1).

5. A kind of experimental equipment for triaxial fracturing of rocks according to claim 1, characterized in that: Two screw holes (17) are symmetrically arranged up and down at the left position on the front of the box body (1). Two through holes (25) are symmetrically arranged up and down at the left position on the front of the box door (2). The through holes (25) face the screw holes (17).

6. The experimental equipment for triaxial fracturing of rocks according to claim 1, characterized in that: A handle (24) is also arranged at the left position on the front of the box door (2).

7. A kind of rock triaxial fracturing experimental equipment according to claim 1, characterized in that: The two side pressing plates (121) are horizontally aligned. The lower pressing plate (111), the pressure plate (131) and the two side pressing plates (121) are all aligned.

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