A thermal insulation device for frozen rock and soil flying chip impact test

Abstract

The invention discloses a thermal insulation device for a frozen rock and soil flying chip impact test, which belongs to the technical field of flying chip impact test, and comprises a first thermal insulation mechanism, a second thermal insulation mechanism, a target frame, a flying chip impact test target plate arranged on the target frame, a thermal insulation jacket, a cover plate and a driving mechanism; the first thermal insulation mechanism comprises a thermal insulation bottom plate A, a thermal insulation inner cylinder A and a thermal insulation outer cylinder A; the second thermal insulation mechanism comprises a thermal insulation bottom plate B, a thermal insulation inner cylinder B and a thermal insulation outer cylinder B; a gap for storing ice is provided between the thermal insulation inner cylinder B and the thermal insulation outer cylinder B; the invention utilizes a layered thermal insulation method, and a gap is provided between the thermal insulation inner cylinder B and the thermal insulation outer cylinder B, and water can be injected into the gap before the test starts, and the flying chip impact test target plate is insulated by utilizing the frozen first thermal insulation mechanism and the second thermal insulation mechanism, thereby solving the problem that rocks normally frozen at room temperature cool down quickly and the temperature cannot be controlled within the required range for the test.

Description

Technical Field

[0001] The invention relates to a frozen rock and soil flying chip impact test insulation device, belonging to the technical field of flying chip impact test. Background Art

[0002] The high-pressure state equation of rock under hypervelocity impact is the basis for studying the damage effects of rock. In addition, conflicts continue in the western region of my country, and the western region has low temperatures all year round. Therefore, it is extremely important to study the damage effects of frozen rock and soil under hypervelocity impact. Currently, damage tests are mainly carried out through experimental equipment such as two-stage light gas guns. However, normally frozen rocks cannot meet the temperature control requirements of the test. The temperature drops very quickly at room temperature, and the temperature drop rate of rock and soil under different indoor temperature conditions is very different. Therefore, the temperature of the rock and soil at the time of impact cannot be controlled to the temperature required for the test, resulting in inaccurate test data. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a frozen rock and soil flying chip impact test insulation device, which solves the problem that the rock normally frozen at room temperature cools down quickly and the temperature cannot be controlled within the range required for the test.

[0004] In order to achieve the above purpose / solve the above technical problems, the present invention is implemented by adopting the following technical solutions:

[0005] A frozen rock and soil flying chip impact test insulation device, comprising a first insulation mechanism, a second insulation mechanism, a target frame, a flying chip impact test target plate arranged on the target frame, an insulation jacket, a cover plate, and a driving mechanism arranged on the insulation jacket for driving the cover plate;

[0006] The first heat preservation mechanism comprises a heat preservation bottom plate A, a heat preservation inner cylinder A and a heat preservation outer cylinder A;

[0007] One end of the thermal insulation inner cylinder A is connected to the thermal insulation bottom plate A, and the other end of the thermal insulation inner cylinder A is connected to the target plate of the flying piece impact test; one end of the thermal insulation outer cylinder A is connected to the thermal insulation bottom plate A, and the other end of the thermal insulation outer cylinder A is connected to the target plate of the flying piece impact test;

[0008] The second heat preservation mechanism comprises a heat preservation bottom plate B, a heat preservation inner cylinder B and a heat preservation outer cylinder B;

[0009] The thermal insulation bottom plate B is connected to the target plate of the flying piece impact test;

[0010] The heat-insulating inner cylinder B and the heat-insulating outer cylinder B are coaxially distributed, the heat-insulating inner cylinder B is connected to the heat-insulating bottom plate B, the heat-insulating outer cylinder B is connected to the heat-insulating bottom plate B, and there is a gap between the heat-insulating inner cylinder B and the heat-insulating outer cylinder B for storing ice;

[0011] The thermal insulation jacket is sleeved on the outside of the thermal insulation outer cylinder B, one end of the thermal insulation jacket is connected to the flying piece impact test target plate, and the other end of the thermal insulation jacket is in contact with the cover plate.

[0012] Optionally, two coaxially distributed slots are provided on the side of the insulation bottom plate A, and the insulation inner cylinder A and the insulation outer cylinder A are respectively inserted into different slots, so that the insulation inner cylinder A and the insulation outer cylinder A are better connected to the insulation bottom plate A respectively.

[0013] Optionally, the thermal insulation inner cylinder A and the thermal insulation outer cylinder A are coaxially distributed, the thermal insulation inner cylinder A is provided with a first groove, and the thermal insulation outer cylinder A is provided with a second groove at a position corresponding to the first groove, and the first groove and the second groove are used for passing the measuring optical fiber.

[0014] Optionally, two coaxially distributed slots are provided on the side of the insulation bottom plate B, and the insulation inner cylinder B and the insulation outer cylinder B are respectively inserted into different slots, so that the insulation inner cylinder B and the insulation outer cylinder B are better connected to the insulation bottom plate B respectively.

[0015] Optionally, the thermal insulation bottom plate B is in a circular ring shape and is used for a target plate for a secondary light gas gun shooting flying fragments to impact a test target plate.

[0016] Optionally, the driving mechanism includes a steering gear and a control circuit board, the control circuit board is electrically connected to the steering gear; the steering gear housing is fixedly connected to the thermal insulation jacket, and the steering gear motor drive shaft is fixedly connected to the cover plate.

[0017] Optionally, the thermal insulation inner tube B and the thermal insulation outer tube B are both steel pipes.

[0018] Optionally, the thermal insulation inner cylinder A, the thermal insulation outer cylinder A, the thermal insulation bottom plate A, the thermal insulation outer jacket and the cover plate are all made of nylon PLA material by 3D printing.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention utilizes a layered insulation method to respectively arrange an insulation inner cylinder A, an insulation outer cylinder A, an insulation inner cylinder B, and an insulation outer cylinder B on both sides of a target plate for a flying chip impact test, and a gap is provided between the insulation inner cylinder B and the insulation outer cylinder B. Water can be injected into the gap before the test starts, and the first insulation mechanism, the second insulation mechanism, and the target plate for the flying chip impact test are frozen at the same temperature. The target plate for the flying chip impact test is insulated by utilizing the frozen first insulation mechanism and the second insulation mechanism to maintain a low temperature on the test impact side, which can effectively slow down the heating speed of the target plate for the flying chip impact test, and solves the problem that the rock normally frozen at room temperature cools down quickly and the temperature cannot be controlled within the required range for the test.

[0021] 2. The present invention provides a heat-insulating jacket on the outside of the heat-insulating outer cylinder B, and provides a cover plate at the opening of the heat-insulating outer cylinder, and uses the cover plate to cover the heat-insulating outer cylinder B and the heat-insulating inner cylinder B. At the same time, the cover plate is controlled to open and close by a steering gear. Since the experimental environment of the two-stage light gas gun is a vacuum, the cover plate can be opened by the steering gear after the personnel are completely evacuated, thereby reducing the influence of the temperature in the heat-insulating inner cylinder B on the external temperature during the preparation stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a thermal insulation device for frozen rock and soil flying chip impact test provided by an embodiment of the present invention (the cover is not opened);

[0023] Figure 2 It is a schematic diagram of the overall structure of a thermal insulation device for frozen rock and soil flying chip impact test provided by an embodiment of the present invention (the cover plate is opened);

[0024] Figure 3 Schematic diagram of a first heat preservation mechanism of a heat preservation device for a frozen rock and soil flying chip impact test provided by an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of a heat-insulating bottom plate B of a heat-insulating device for a frozen rock and soil flying chip impact test provided by an embodiment of the present invention;

[0026] Figure 5 It is an exploded diagram of a thermal insulation device for a frozen rock and soil flying chip impact test provided by an embodiment of the present invention;

[0027] Figure 6 It is a temperature rise curve diagram of a target plate of a flying chip impact test of a frozen rock and soil flying chip impact test insulation device provided by an embodiment of the present invention at room temperature and a temperature change curve diagram compared with the previous minute;

[0028] Figure 7 It is a temperature rise curve of the target plate of the flying chip impact test at room temperature and a temperature change curve compared with the previous minute.

[0029] In the figure: 1. first heat-insulating mechanism; 101. heat-insulating bottom plate A; 102. heat-insulating inner cylinder A; 103. heat-insulating outer cylinder A; 2. second heat-insulating mechanism; 201. heat-insulating bottom plate B; 202. heat-insulating inner cylinder B; 203. heat-insulating outer cylinder B; 3. target stand; 4. target plate for flying piece impact test; 5. heat-insulating jacket; 6. cover plate; 7. driving mechanism; 701. servo; 8. gap. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example

[0033] like Figure 1 and Figure 3 As shown, a thermal insulation device for a frozen rock and soil flying chip impact test comprises a first thermal insulation mechanism 1, a second thermal insulation mechanism 2, a target frame 3, a flying chip impact test target plate 4, a thermal insulation jacket 5, a cover plate 6 and a driving mechanism 7; the flying chip impact test target plate 4 is connected to the target frame 3 by bolts; the first thermal insulation mechanism 1 comprises a thermal insulation bottom plate A101, a thermal insulation inner cylinder A102 and a thermal insulation outer cylinder A103; the front side of the thermal insulation bottom plate A101 is provided with two slots distributed coaxially, the slot depth is 1 mm, the rear end of the thermal insulation inner cylinder A102 is connected to the thermal insulation outer cylinder A103 The rear ends of the heat preservation inner cylinder A102 and the heat preservation outer cylinder A103 are respectively inserted into different slots and glued together by glue. The slots make the connection between the heat preservation inner cylinder A102 and the heat preservation outer cylinder A103 and the heat preservation bottom plate A101 more tightly; the front end of the heat preservation inner cylinder A102 is fixedly connected to the rear side of the flying chip impact test, and the front end of the heat preservation outer cylinder A103 is fixedly connected to the rear side of the flying chip impact test target plate 4; the side of the heat preservation inner cylinder A102 is provided with a first groove, and the position of the heat preservation outer cylinder A103 corresponding to the first groove is provided with a second groove, and the first groove and the second groove are used to pass the measuring optical fiber;

[0034] like Figure 1 , Figure 4 and Figure 5As shown, the second insulation mechanism 2 includes an insulation bottom plate B201, an insulation inner cylinder B202 and an insulation outer cylinder B203; the rear side of the insulation bottom plate B201 is fixedly connected to the front side of the flying chip impact test target plate 4, the insulation bottom plate B201 is annular, and the secondary light gas gun can shoot the flying chip impact test target plate 4 from the middle of the insulation bottom plate B201, and the front side of the insulation bottom plate B201 is provided with two coaxially distributed slots, the slot depth is 1mm, the rear end of the insulation inner cylinder B202 and the rear end of the insulation outer cylinder B203 are respectively plugged into different slots, and are glued by glue, so that the insulation slots make the insulation The inner cylinder B202 and the insulating outer cylinder B203 are respectively more tightly connected to the insulating bottom plate B201; there is a gap 8 between the insulating inner cylinder B202 and the insulating outer cylinder B203, which can be used to store ice and water. Before the test starts, water is poured into the gap 8, and the first insulating mechanism 1, the second insulating mechanism 2 and the flying chip impact test target plate 4 are placed in a low temperature box and frozen at the same temperature. The flying chip impact test target plate 4 is insulated by the frozen first insulating mechanism 1 and the second insulating mechanism 2, and the low temperature of the test impact side is maintained, which can effectively slow down the heating speed of the flying chip impact test target plate 4;

[0035] like Figure 1 , Figure 2 and Figure 5 As shown, the driving mechanism 7 includes a steering gear 701 and a control circuit board, and the control circuit board is electrically connected to the steering gear 701; the outer shell of the steering gear 701 is fixedly connected to the thermal insulation jacket 5, the motor drive shaft of the steering gear 701 is fixedly connected to the cover plate 6, the thermal insulation jacket 5 is sleeved on the outside of the thermal insulation outer cylinder B203, the rear end of the thermal insulation jacket 5 is fixedly connected to the front side of the flying piece impact test target plate 4, the front end of the thermal insulation jacket 5 is in contact with the cover plate 6, and the cover plate 6 is used to cover the thermal insulation outer cylinder B203 and the thermal insulation inner cylinder B202, and the cover plate 6 is controlled to open and close by the steering gear 701; since the experimental environment of the two-stage light gas gun is vacuum, the cover plate 6 can be opened by the steering gear 701 after the personnel are completely evacuated, so as to reduce the influence of the temperature in the thermal insulation inner cylinder B202 on the external temperature during the preparation stage;

[0036] Since a certain volume of water needs to be frozen between the thermal insulation inner cylinder B202 and the thermal insulation outer cylinder B203, in order to prevent the thermal insulation device from being damaged due to excessive deformation, the thermal insulation inner cylinder B202 and the thermal insulation outer cylinder B203 are both steel pipes.

[0037] The thermal insulation inner cylinder A102, the thermal insulation outer cylinder A103, the thermal insulation bottom plate A101, the thermal insulation outer jacket 5 and the cover plate 6 are all 3D printed with nylon PLA material, which makes the overall cost low and has good economic adaptability to the impact test.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A frozen rock and soil flying chip impact test insulation device, characterized in that: It comprises a first heat preservation mechanism, a second heat preservation mechanism, a target frame, a target plate for a flying chip impact test arranged on the target frame, a heat preservation jacket, a cover plate, and a driving mechanism arranged on the heat preservation jacket for driving the cover plate; The first heat preservation mechanism comprises a heat preservation bottom plate A, a heat preservation inner cylinder A and a heat preservation outer cylinder A; One end of the thermal insulation inner cylinder A is connected to the thermal insulation bottom plate A, and the other end of the thermal insulation inner cylinder A is connected to the target plate of the flying piece impact test; one end of the thermal insulation outer cylinder A is connected to the thermal insulation bottom plate A, and the other end of the thermal insulation outer cylinder A is connected to the target plate of the flying piece impact test; The second heat preservation mechanism comprises a heat preservation bottom plate B, a heat preservation inner cylinder B and a heat preservation outer cylinder B; The thermal insulation bottom plate B is connected to the target plate of the flying piece impact test; The heat-insulating inner cylinder B and the heat-insulating outer cylinder B are coaxially distributed, the heat-insulating inner cylinder B is connected to the heat-insulating bottom plate B, the heat-insulating outer cylinder B is connected to the heat-insulating bottom plate B, and there is a gap between the heat-insulating inner cylinder B and the heat-insulating outer cylinder B for storing ice; The thermal insulation jacket is sleeved on the outside of the thermal insulation outer cylinder B, one end of the thermal insulation jacket is connected to the flying piece impact test target plate, and the other end of the thermal insulation jacket is in contact with the cover plate.

2. A frozen rock and soil flying chip impact test insulation device according to claim 1, characterized in that: Two coaxially distributed slots are provided on the side of the heat-insulating bottom plate A, and the heat-insulating inner cylinder A and the heat-insulating outer cylinder A are respectively inserted into different slots.

3. A frozen rock and soil flying chip impact test insulation device according to claim 1, characterized in that: The heat-insulating inner cylinder A is coaxially distributed with the heat-insulating outer cylinder A. The heat-insulating inner cylinder A is provided with a first groove. The heat-insulating outer cylinder A is provided with a second groove at a position corresponding to the first groove. The first groove and the second groove are used for passing the measuring optical fiber.

4. A frozen rock and soil flying chip impact test insulation device according to claim 1, characterized in that: Two coaxially distributed slots are provided on the side of the heat-insulating bottom plate B, and the heat-insulating inner cylinder B and the heat-insulating outer cylinder B are respectively inserted into different slots.

5. The frozen rock and soil flying chip impact test insulation device according to claim 1, characterized in that: The heat-insulating bottom plate B is in a circular ring shape.

6. A frozen rock and soil flying chip impact test insulation device according to claim 1, characterized in that: The driving mechanism includes a steering gear and a control circuit board, wherein the control circuit board is electrically connected to the steering gear; the steering gear is provided with a housing and a motor, wherein the housing of the steering gear is fixedly connected to the thermal insulation jacket, and the motor transmission shaft of the steering gear is fixedly connected to the cover plate.

7. A frozen rock and soil flying chip impact test insulation device according to claim 1, characterized in that: The thermal insulation inner tube B and the thermal insulation outer tube B are both steel pipes.

8. The thermal insulation device for frozen rock and soil flying chip impact test according to claim 1, characterized in that: The thermal insulation inner cylinder A, the thermal insulation outer cylinder A, the thermal insulation bottom plate A, the thermal insulation outer jacket and the cover plate are all made of nylon PLA material by 3D printing.

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