A multi-angle packing material testing device

Abstract

This invention discloses a multi-angle filling material testing device, belonging to the technical field of material testing devices. It includes a base and a vertical plate vertically mounted on the base. A first traction structure is provided on the base, and a second traction structure is provided on the vertical plate. A bottom plate is slidably connected to the base and the vertical plate. A material cylinder is provided on the bottom plate, and the material cylinder is provided with a lifting and pressing structure and a feed inlet. The lifting and pressing structure is provided with a compensation structure and a vibration structure. This invention fills the material cylinder with filling material and uses the first and second traction structures to move the bottom plate, adjusting the tilt angle of the material cylinder. The lifting and pressing structure adjusts the angle of the upper surface of the filling material to conduct tests on the filling material under different pressure angles. Simultaneously, the vibration structure strikes the compensation structure, causing the compensation structure to extend into the filling material, subjecting the filling material to vibration and gas blowing, thereby ensuring uniform material distribution and guaranteeing the accuracy of the test results.

Description

Technical Field

[0001] This invention relates to the field of material testing equipment technology, and specifically to a multi-angle filling material testing device. Background Technology

[0002] Backfill material is a solid material composed of soil, sand, stone, boulders, industrial waste, and cementing substances such as cement. It is used to fill goaf areas in mining engineering. The compressive strength of the backfill material is a key factor in controlling rock strata movement and surface subsidence during backfilling mining. The better the compressive strength and the smaller the compressibility, the better the control over rock strata movement and surface subsidence deformation. Backfill materials need to be tested using testing equipment to determine their compressive mechanical properties.

[0003] The existing invention patent with publication number CN116429593B discloses a test device for variable-angle bulk filling materials. It uses a rotating rod and a supporting plate connected to it. A pressure plate is vertically telescopically installed in the middle of the supporting plate. By rotating the supporting plate, the angle of the upper surface of the material can be adjusted. Therefore, even if the pressure on the material is always in the vertical direction, the direction of the force on the material will change after changing the angle of the upper surface of the material, and it will not be affected by the change of the angle of the base. It can change the upper angle of the material to test the performance of the material under different pressure angles, and it can also change the lower angle of the material to test the performance of the filling material under different force angles.

[0004] However, the existing technology still has the following problems: when the angle of the upper surface of the material is changed by the support plate and the pressure plate, there is friction between the materials and between the material and the inner wall of the barrel. At the same time, the material itself is subject to gravity, so when the material is subjected to the pressure of the support plate and the pressure plate, when the angle of the upper surface of the material is changed, most of the material particles are at the bottom of the lower surface of the support plate, while the top of the lower surface of the support plate is easily suspended. That is, the material particles are unevenly distributed, which affects the accuracy of the test structure. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-angle filling material testing device, which solves the technical problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] A multi-angle filling material testing device includes a base and a vertical plate vertically mounted on the base. The base has a first traction structure capable of providing traction force in the horizontal direction, and the vertical plate has a second traction structure capable of providing traction force in the vertical direction. A bottom plate is slidably connected to both the base and the vertical plate, with both ends of the bottom plate connected to the first and second traction structures, respectively. A material cylinder for holding filling material is mounted on the bottom plate. The material cylinder has a lifting and pressing structure for applying pressure to the filling material and an inlet for adding filling material. The pressing surface of the lifting and pressing structure is rotatable. The lifting and pressing structure has a compensation structure and a vibration structure. The compensation structure extends into the filling material after the lifting and pressing structure compresses the upper surface of the filling material and adjusts the distribution area of ​​the filling material through gas pressure. The vibration structure drives the compensation structure into the filling material and transmits vibration to the compensation structure. The bottom of the material cylinder has an outlet that can be opened and closed.

[0008] As a preferred embodiment of the present invention, the first traction structure and the second traction structure have the same structure. The first traction structure includes a screw and a slide rod disposed on the base. The screw and the slide rod are connected together to a slide seat that slides in contact with the base. The slide seat is rotatably connected to a plurality of support seats that are connected to one side of the base plate.

[0009] As a preferred embodiment of the present invention, the material cylinder is hollow inside and closed at both ends. The inner wall of the material cylinder parallel to the axis is composed of a bearing plane and a circular arc surface, and the width of the bearing plane is smaller than the diameter of the circular arc surface.

[0010] In a preferred embodiment of the present invention, the lifting and pressurizing structure includes a lifting column slidably inserted into the material cylinder, an adjusting seat rotatably connected to the bottom of the lifting column, a pressure plate slidably connected to the adjusting seat, connecting shafts rotatably connected to the center of both ends of the material cylinder, a driving device for driving the connecting shafts to rotate at the end of the material cylinder, a sliding frame rotatably connected to the inner wall of the material cylinder by the two connecting shafts, and the pressure plate slidably embedded in the sliding frame, a slot is provided on the material cylinder, a sliding sleeve is slidably sleeved on the lifting column, and the sliding sleeve is slidably connected in the slot.

[0011] As a preferred embodiment of the present invention, the pressure plate is provided with an elastic metal skirt on its periphery, and the elastic metal skirt abuts against the inner wall of the barrel.

[0012] In a preferred embodiment of the present invention, the compensation structure includes multiple hollow rods, each divided into two groups. The tops of the hollow rods in the same group are connected to a hollow plate, and each hollow plate communicates with the interior of the corresponding hollow rods. An air compressor is connected via an air pipe. Multiple elastic fitting components are provided at the bottom of the pressure plate. When the hollow plate is not under stress, the bottom of each hollow rod is flush with the bottom of the pressure plate due to the elastic force of the elastic fitting components. Air jet holes are provided on the sidewalls of each hollow rod. Multiple insertion holes are symmetrically provided on the top of the pressure plate, and these insertion holes are symmetrically arranged about the center line of the pressure plate. Multiple hollow rods are slidably inserted into their corresponding insertion holes. A limiting groove communicating with the bottom of the pressure plate is provided on the inner sidewall of each insertion hole, and the multiple elastic fitting components are respectively disposed within the multiple limiting grooves.

[0013] In a preferred embodiment of the present invention, the elastic fitting assembly includes a spring and a pressure block adapted to the size of the limiting groove. The pressure block is disposed on the outer side wall of the hollow rod and is flush with the bottom of the hollow rod. The pressure block is slidably connected in the limiting groove. The bottom of the limiting groove has a mounting hole for installing the spring. The two ends of the spring are respectively connected to the inner bottom of the pressure block and the mounting hole. When the bottom of the hollow rod is flush with the bottom of the pressure plate, the pressure block abuts against the inner bottom of the mounting hole, and the spring is in a stretched state.

[0014] As a preferred embodiment of the present invention, the vibration structure includes two rotating devices disposed on the pressure plate, each of the rotating devices being provided with an elastic lever, and the elastic lever being used to strike the hollow plate to move downward.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This invention uses a filling cylinder to load filling material and employs a first and second traction structure to move the base plate, thereby adjusting the tilt angle of the cylinder. This allows the filling material to be tested under different tilt angles. A lifting and pressing structure applies pressure to the filling material for testing, and the lifting and pressing structure also adjusts the angle of the upper surface of the filling material to test it under different pressure angles. While adjusting the angle of the upper surface of the material, a vibration structure simultaneously strikes a compensation structure, causing the compensation structure to extend into the filling material. This causes the filling material to be subjected to vibration and gas blowing, resulting in uniform material distribution and ensuring the accuracy of the test results. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0020] Figure 3 This is a cross-sectional view of the present invention. Figure 1 ;

[0021] Figure 4 This is a cross-sectional view of the present invention. Figure 2 ;

[0022] Figure 5 This is a partial structural schematic diagram of the lifting and pressing structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the pressure plate of the present invention;

[0024] Figure 7 This is a cross-sectional view of the present invention. Figure 3 ;

[0025] Figure 8 for Figure 3 Enlarged structural diagram of section A;

[0026] Figure 9 for Figure 6 Enlarged structural diagram of section B;

[0027] Figure 10 for Figure 4 A magnified schematic diagram of the structure of section C.

[0028] The labels in the diagram represent the following:

[0029] 1. Base; 2. Vertical plate; 3. First traction structure; 4. Second traction structure; 5. Bottom plate; 6. Material cylinder; 7. Lifting and pressing structure; 8. Compensation structure; 9. Vibration structure;

[0030] 301. Screw; 302. Slide rod; 303. Slide seat; 304. Support seat; 701. Lifting column; 702. Adjusting seat; 703. Pressure plate; 704. Connecting shaft; 705. Sliding frame; 706. Elastic metal skirt; 707. Sliding sleeve; 801. Hollow rod; 802. Insertion hole; 803. Hollow plate; 804. Elastic fitting assembly; 805. Air jet hole; 806. Limiting groove; 807. Spring; 808. Pressure block; 809. Mounting hole; 901. Rotating device; 902. Elastic lever. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 10 As shown, the present invention provides a multi-angle filling material testing device, including a base 1 and a vertical plate 2 vertically arranged on the base 1. The base 1 is provided with a first traction structure 3 capable of providing traction force in the horizontal direction, and the vertical plate 2 is provided with a second traction structure 4 capable of providing traction force in the vertical direction. A bottom plate 5 is slidably connected to the base 1 and the vertical plate 2, and the two ends of the bottom plate 5 are respectively connected to the first traction structure 3 and the second traction structure 4. A material cylinder 6 for placing filling material is provided on the bottom plate 5. The material cylinder 6 is provided with a lifting and pressing structure 7 for applying pressure to the filling material and a feed port for adding filling material. The pressing surface on the lifting and pressing structure 7 can rotate. The lifting and pressing structure 7 is provided with a compensation structure 8 and a vibration structure 9. The compensation structure 8 is used to extend into the filling material after the lifting and pressing structure 7 squeezes the upper surface of the filling material, and adjusts the distribution area of ​​the filling material by gas pressure. The vibration structure 9 is used to drive the compensation structure 8 into the filling material and transmit vibration to the compensation structure 8. The bottom of the material cylinder 6 is provided with a discharge port that can be opened and closed.

[0033] The first traction structure 3 and the second traction structure 4 have the same structure. The first traction structure 3 includes a screw 301 and a slide rod 302 set on the base 1. The screw 301 and the slide rod 302 are connected together to a slide seat 303 that slides in contact with the base 1. Multiple support seats 304 connected to one side of the base plate 5 are rotatably connected to the slide seat 303.

[0034] The material cylinder 6 is hollow inside and closed at both ends. The inner wall of the material cylinder 6, which is parallel to the axis, is composed of a bearing plane and a circular arc surface, and the width of the bearing plane is smaller than the diameter of the circular arc surface.

[0035] In application, granular filling material is filled into the cylinder 6 through the inlet. At this time, the outlet is closed. Then, according to the test design requirements, the first traction structure 3 and the second traction structure 4 jointly pull the base plate 5 to move, so that the two ends of the base plate 5 move on the base 1 and the vertical plate 2 respectively, thereby adjusting the tilt angle of the base 1, and then adjusting the tilt angle of the cylinder 6, so that the filling material at different tilt angles can be tested through the lifting and pressing structure 7.

[0036] When adjusting the tilt angle of the base plate 5, the screw 301 driven by the power device such as the motor drives the slide 303 to move, so that the multiple support seats 304 on the slide 303 simultaneously pull the base plate 5 to move, so that the bottom of the base plate 5 moves towards or away from the vertical plate 2. The first traction structure 3 and the second traction structure 4 respectively pull the two ends of the base plate 5, thereby adjusting the tilt angle of the base plate 5.

[0037] When the upper surface of the filling material is subjected to tests at different force angles, the pressure surface on the lifting and pressing structure 7 presses the upper surface of the filling material, thereby adjusting the angle of the upper surface of the filling material. At the same time, the compensation structure 8 is driven by the vibration structure 9 to extend into the interior of the filling material and uses gas pressure to blow the granular filling material, so that the position of the filling material is forcibly changed, thereby adjusting the distribution position of the filling material in the material cylinder 6. The vibration generated by the vibration structure 9 is transmitted to the compensation structure 8, making it easier for the filling material to disperse after being vibrated. The filling material can fill the empty area, so that the filling material is evenly distributed in the area below the lifting and pressing structure 7, improving the accuracy of the test results obtained after the filling material is tested.

[0038] The planar sidewalls inside the barrel 6 are used to provide a bearing surface to support the filling material, so that the filling material can be tested at different tilt angles.

[0039] The pressure surface of the lifting and pressing structure 7 is the surface on the lifting and pressing structure 7 that contacts the filling material and presses down on the filling material.

[0040] The lifting and pressurizing structure 7 includes a lifting column 701 slidably inserted into the material cylinder 6. An adjusting seat 702 is rotatably connected to the bottom of the lifting column 701. A pressure plate 703 is slidably connected to the adjusting seat 702. A connecting shaft 704 is rotatably connected to the center of both ends of the material cylinder 6. A driving device for driving the connecting shaft 704 to rotate is provided at the end of the material cylinder 6. The two connecting shafts 704 are rotatably connected to a sliding frame 705 that is slidably sealed to the inner side wall of the material cylinder 6. The pressure plate 703 is slidably embedded in the sliding frame 705. A slot is provided on the material cylinder 6. A sliding sleeve 707 is slidably sleeved on the lifting column 701. The sliding sleeve 707 is slidably connected in the slot.

[0041] The lifting column 701 is connected to an external pressure device such as a hydraulic telescopic rod or other existing equipment. The lifting column 701 is driven to move up and down through the pressure device. When the lifting column 701 moves down, it drives the adjusting seat 702 to move down synchronously, thereby driving the pressure plate 703 to move down to press down the filling material for testing.

[0042] When it is necessary to adjust the angle of the upper surface of the filling material, the connecting shaft 704 is driven by a drive device such as a motor to drive the sliding frame 705 to rotate. Since the pressure plate 703 is slidably embedded in the sliding frame 705, it can drive the pressure plate 703 to rotate at the same time, so that the upper surface of the filling material changes under the pressure of the pressure plate 703 and the sliding frame 705, thereby adjusting the angle of the upper surface of the filling material, and adjusting the distribution position of the filling material through the compensation structure 8 and the vibration structure 9.

[0043] During the rotation of the pressure plate 703, since the horizontal position of the lifting column 701 does not change, the adjusting seat 702 slides on the pressure plate 703, while the sliding sleeve 707 slides along the surface of the lifting column 701 and along the slot, so that the pressure plate 703 and the sliding frame 705 can rotate normally.

[0044] The sliding frame 705 and the pressure plate 703 work together to restrict the filling material from flowing out of the gap between the sliding frame 705 and the pressure plate 703.

[0045] Furthermore, the sliding frame 705 and the inner wall of the cylinder 6 can also be in sliding contact, as long as the filling material does not flow out from between the sliding frame 705 and the inner wall of the cylinder 6.

[0046] The pressure plate 703 is provided with an elastic metal skirt 706 on its periphery, and the elastic metal skirt 706 abuts against the inner wall of the material cylinder 6.

[0047] By setting an elastic metal skirt 706, pressure can also be applied to the filling material at the lower surface of the sliding frame 705 through the elastic metal skirt 706, preventing the filling material from flowing out of the gap between the pressure plate 703 and the inner wall of the cylinder 6, ensuring that the pressure of the pressure plate 703 is fully applied to the filling material, and improving the accuracy of the test structure.

[0048] The compensation structure 8 includes multiple hollow rods 801, which are divided into two groups. The tops of the hollow rods 801 in the same group are connected to a hollow plate 803. Each hollow plate 803 communicates with the interior of the corresponding hollow rods 801 and is connected to an air compressor via an air pipe. Multiple elastic fitting components 804 are provided at the bottom of the pressure plate 703. When the hollow plate 803 is not under stress, the bottom of each hollow rod 801 is held in place by the elastic force of the elastic fitting components 804. The bottom of the plate 703 is flush with the bottom. Each hollow rod 801 has a jet hole 805 on its side wall. The top of the pressure plate 703 has multiple insertion holes 802 symmetrically arranged about the center line of the pressure plate 703. Multiple hollow rods 801 are slidably inserted into the corresponding insertion holes 802. Each insertion hole 802 has a limiting groove 806 that communicates with the bottom of the pressure plate 703 on its inner side wall. Multiple elastic fitting components 804 are respectively arranged in the multiple limiting grooves 806.

[0049] The elastic fitting assembly 804 includes a spring 807 and a pressure block 808 that is adapted to the size of the limiting groove 806. The pressure block 808 is disposed on the outer side wall of the hollow rod 801 and is flush with the bottom of the hollow rod 801. The pressure block 808 is slidably connected in the limiting groove 806. The bottom of the limiting groove 806 is provided with a mounting hole 809 for installing the spring 807. The two ends of the spring 807 are respectively connected to the inner bottom of the pressure block 808 and the mounting hole 809. When the bottom of the hollow rod 801 is flush with the bottom of the pressure plate 703, the pressure block 808 abuts against the inner bottom of the mounting hole 809, and the spring 807 is in a stretched state.

[0050] The vibration structure 9 includes two rotating devices 901 mounted on the pressure plate 703. Each rotating device 901 is equipped with an elastic lever 902, which is used to strike the hollow plate 803 to move downwards.

[0051] The rotating device 901 drives the elastic lever 902 to strike the corresponding hollow plate 803. After being struck by the elastic lever 902, the hollow plate 803 pushes multiple hollow rods 801 downwards along the insertion hole 802 until they are inserted into the filling material. At this time, the air jet hole 805 is exposed inside the filling material. The air compressor delivers compressed gas to the multiple hollow rods 801 through the air pipe and the hollow plate 803, and sprays it into the filling material through the air jet hole 805. The filling material is impacted by the compressed gas and disperses and redistributes itself. In particular, the dispersed filling material fills the empty areas below the pressure plate 703 and the sliding frame 705, so that the filling material is evenly distributed below the pressure plate 703 and the sliding frame 705, avoiding some areas from not being in sufficient contact with the pressure plate 703 and affecting the accuracy of the test results.

[0052] During the redistribution of the filling material, when the hollow rod 801 moves downward under the impact of the elastic lever 902, the spring 807 is stretched. When the elastic lever 902 is compressed by the hollow rod 801, it undergoes elastic deformation and passes over the hollow plate 803. Under the elastic force of multiple springs 807, multiple hollow rods 801 connected to the same hollow plate 803 move upward synchronously to reset. Meanwhile, the elastic lever 902 rotates cyclically, causing multiple hollow rods 801 in the same group to move downward again. That is, multiple hollow rods 801 in the same group move downward again under the impact of the elastic lever 902 to generate vibration, which is transmitted to the filling material. This causes the filling material to disperse as a whole after being vibrated, and it is easier to disperse to the empty area after being impacted by gas, which increases the movement rate and improves the uniformity of the filling material after adjustment, thereby improving the accuracy of the test results.

[0053] When the filling material is subjected to a pressure test, the rotating device 901 stops working. Under the elastic force of the spring 807, the pressure block 808 drives the hollow rod 801 to move upward. The pressure block 808 moves to the limiting groove 806 and abuts against the inner bottom of the limiting groove 806. The limiting groove 806 restricts the movement of the pressure block 808, causing the hollow rod 801 to stop moving. This makes the bottom of the pressure block 808 and the hollow rod 801 flush with the lower surface of the pressure plate 703. That is, the bottom of the pressure plate 703, the multiple pressure blocks 808 and the multiple hollow rods 801 together form a flat plane, preventing the pressure block 808 and the hollow rod 801 from protruding from the pressure plate 703 and affecting the accuracy of the test results.

[0054] Two sets of hollow rods 801 are provided to improve the rate of adjustment of the filling material position.

[0055] The lower surface of the pressure plate 703, which is the pressure surface of the lifting and pressing structure 7, is used to compress the filling material.

[0056] In this embodiment, the rotating device 901 is a prior art device, such as a motor, electric motor or other device that can drive the elastic lever 902 to rotate. The technical principle will not be elaborated in detail here.

[0057] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A multi-angle packing material testing device comprising a base (1) and a vertical plate (2) vertically arranged on the base (1), characterized in that, The base (1) is provided with a first traction structure (3) capable of providing horizontal traction, the vertical plate (2) is provided with a second traction structure (4) capable of providing vertical traction, the base (1) and the vertical plate (2) are slidably connected with a bottom plate (5), and the two ends of the bottom plate (5) are connected with the first traction structure (3) and the second traction structure (4) respectively, the bottom plate (5) is provided with a barrel (6) for placing filling material, the barrel (6) is provided with a lifting pressure structure (7) for pressing the filling material and a feeding port for adding the filling material, and the pressing surface of the lifting pressure structure (7) can rotate, the lifting pressure structure (7) is provided with a compensation structure (8) and a vibration structure (9), the compensation structure (8) is used for extending into the filling material after extruding the upper surface of the filling material, and the distribution area of the filling material is adjusted by gas pressure, and the vibration structure (9) is used for driving the compensation structure (8) into the filling material and transmitting vibration to the compensation structure (8), the bottom of the barrel (6) is provided with an outlet capable of being opened and closed; The lifting pressure structure (7) comprises a lifting column (701) slidably inserted into the barrel (6), the bottom of the lifting column (701) is rotatably connected with an adjusting seat (702), the adjusting seat (702) is slidably connected with a pressing plate (703), the centers of the two ends of the barrel (6) are rotatably connected with connecting shafts (704), the ends of the barrel (6) are provided with driving devices for driving the connecting shafts (704) to rotate, the two connecting shafts (704) are rotatably connected with a sliding frame (705) slidably connected with the inner side wall of the barrel (6), and the pressing plate (703) is slidably embedded in the sliding frame (705), the barrel (6) is provided with a slot, the lifting column (701) is slidably sleeved with a sliding sleeve (707), and the sliding sleeve (707) is slidably connected in the slot. The compensation structure (8) comprises a plurality of hollow rods (801), and the plurality of hollow rods (801) are divided into two groups, the top of the hollow rods (801) in the same group is connected with a hollow plate (803) in common, the hollow plate (803) is communicated with the inside of the corresponding hollow rods (801), and the hollow plate (803) is connected with an air compressor through an air pipe, a plurality of elastic embedded components (804) are arranged at the bottom of the pressing plate (703), when the hollow plate (803) is not stressed, the bottom of the hollow rod (801) is pulled to be flush with the bottom of the pressing plate (703) through the elastic force of the elastic embedded component (804), the sidewall of the hollow rod (801) is provided with a gas injection hole (805), the top of the pressing plate (703) is symmetrically provided with a plurality of jack plugs (802), the plurality of jack plugs (802) are symmetrically arranged on the pressing plate (703) about the center line of the pressing plate (703), the plurality of hollow rods (801) are slidingly arranged in the corresponding jack plugs (802), the inner sidewall of the jack plug (802) is provided with a limiting groove (806) communicated with the bottom of the pressing plate (703), and the plurality of elastic embedded components (804) are arranged in the plurality of limiting grooves (806) respectively. The vibration structure (9) comprises two rotating devices (901) arranged on the pressing plate (703), and an elastic lever (902) is arranged on each rotating device (901), and the elastic lever (902) is used for knocking the hollow plate (803) to move downward.

2. A multi-angle packing material testing device according to claim 1, wherein The first traction structure (3) and the second traction structure (4) are the same in structure, the first traction structure (3) comprises a screw rod (301) and a sliding rod (302) arranged on the base (1), the screw rod (301) and the sliding rod (302) are connected with a sliding seat (303) in sliding contact with the base (1) in common, and the sliding seat (303) is rotatably connected with a plurality of support seats (304) connected with one side of the bottom plate (5).

3. A multi-angle packing material testing device according to claim 1, wherein The material cylinder (6) is hollow and closed at both ends, the inner sidewall of the material cylinder (6) parallel to the axis is composed of a bearing plane and a circular arc surface, and the width of the bearing plane is smaller than the diameter of the circular arc surface.

4. The multi-angle proppant testing device of claim 1, wherein, The pressing plate (703) is provided with an elastic metal skirt (706) on the circumferential side, and the elastic metal skirt (706) abuts against the inner sidewall of the material cylinder (6).

5. The multi-angle proppant testing device of claim 1, wherein, The elastic hybrid assembly (804) comprises a spring (807) and a pressing block (808) which is matched with the size of the limiting groove (806), the pressing block (808) is arranged on the outer side wall of the hollow rod (801) and is flush with the bottom of the hollow rod (801), the pressing block (808) is slidingly connected in the limiting groove (806), the bottom of the limiting groove (806) is provided with a mounting hole (809) for mounting the spring (807), the two ends of the spring (807) are connected with the pressing block (808) and the inner bottom of the mounting hole (809) respectively, and when the bottom of the hollow rod (801) is flush with the bottom of the pressing plate (703), the pressing block (808) abuts against the inner bottom of the mounting hole (809), and the spring (807) is in a stretched state.

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