Adjustable high-temperature high-acceleration impact table and test method

Abstract

The invention relates to the technical field of impact tests, in particular to an adjustable high-temperature and high-acceleration impact table and a test method.The adjustable high-temperature and high-acceleration impact table comprises a test bottom table, a stagnation assembly, an airflow switching assembly, a push-down auxiliary assembly and a heating assembly, two guide columns are vertically and symmetrically arranged at the upper end of the test bottom table, and a top plate is horizontally and jointly arranged at the upper ends of the two guide columns; a descending impact seat is horizontally arranged between the test base table and the top plate, when the test base table needs to carry out an impact test on an elastic sample, the elastic sample can be rapidly heated through cooperation of an airflow switching assembly and a heating assembly which are arranged in the descending impact seat, and then the elastic sample can be rapidly heated during the descending impact test. Through combination of the stagnation assembly and the push-down auxiliary assembly, when the height of the whole test bench is designed to be relatively low, the descending acceleration of the descending impact seat can still be adjusted under the action of high-speed airflow reverse pushing, so that more comprehensive impact test requirements are met, and the test bench is simple to operate and convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of impact testing, in particular to an adjustable high-temperature high-acceleration impact table and a testing method. Background Art

[0002] An impact tester is a material testing machine that applies impact test force to a specimen and performs an impact test. The impact forms of impact testers vary according to the use scenario. When using a vertical impact tester, the impact seat and the specimen base can be replaced to complete vertical impact tests on different products and workpieces.

[0003] When the vertical impact tester in the prior art is in use, it is necessary to use a motor-driven lifting mechanism to lift the impact drop block to a corresponding height, and then make it fall quickly to perform an impact test to complete the impact test. According to different test requirements and standards, it is often necessary to design a test platform with a high vertical drop. Therefore, the impact test bench is taller than ordinary test equipment and occupies a larger area. In addition, when testing samples such as elastic rubber blocks, which may produce changes in material properties due to temperature changes, heating operation is inconvenient. Summary of the invention

[0004] The object of the present invention is to provide an adjustable high-temperature and high-acceleration impact platform and a test method to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an adjustable high-temperature and high-acceleration impact platform, comprising:

[0006] A test base, wherein two guide columns are vertically symmetrically arranged at the upper end of the test base, a top plate is horizontally arranged at the upper ends of the two guide columns, a descending impact seat is horizontally arranged between the test base and the top plate, a lifting assembly is arranged on the side of the test base close to the descending impact seat, the lifting assembly includes a lifting support plate, a sample placement seat is arranged at the center of the test base below the descending impact seat, an elastic sample is placed above the sample placement seat, and an impact contact block is arranged on the side of the descending impact seat close to the elastic sample;

[0007] A stagnation assembly, the stagnation assembly includes two stagnation connecting sleeves, the two stagnation connecting sleeves are vertically symmetrically arranged on both sides of the descending impact seat sleeve connecting guide column;

[0008] An airflow switching assembly, the airflow switching assembly is arranged in the center of the descending impact seat, the airflow switching assembly includes a switching piston disc and a second piston rod, a switching groove is opened in the descending impact seat, and the switching piston disc is movably arranged in the switching groove;

[0009] A push-down auxiliary component, the push-down auxiliary component comprises a first annular groove and a plurality of reverse thrust gas grooves, wherein the plurality of first annular grooves are connected to one side of the switching groove;

[0010] The heating component includes an electric heating box and a blowing heating ring. The electric heating box is vertically arranged on one side of the test base, the blowing heating ring is arranged below the descending impact seat, and the blowing heating ring is connected to one side of the switching slot.

[0011] Preferably, a lifting screw is vertically provided between the top plate and the test base, and the lifting support plate is arranged by movably sleeved on the lifting screw through the screw rod, the lifting support plate is in a U-shaped structure, the top plate and the guide column are staggered, and the two sides of the two lifting support plates are respectively in contact with the two sides of the lower end of the descending impact seat.

[0012] Preferably, the stagnation connecting sleeve is movably connected to the guide column, a stagnation air ring is provided in the stagnation connecting sleeve, a plurality of piston boxes are symmetrically provided on the side of the stagnation air ring close to the guide column, a first piston groove is provided in the plurality of piston boxes which are connected to the stagnation air ring, a first piston rod is movably provided in the first piston groove, one side of the rod member of the first piston rod movably passes through the stagnation air ring and abuts against the side wall of the guide column, and a return spring is sleeved on the side of the rod member of the first piston rod located in the first piston groove.

[0013] Preferably, an extension groove is provided at the upper end of the switching groove and passes through the center of the descending impact seat, a hot gas movable joint is vertically provided at the upper end of the switching piston disk, the upper end of the hot gas movable joint movably passes through the extension groove through a sealing ring, a lifting groove is vertically provided at the center of the lower end of the switching groove, the second piston rod is vertically arranged at the center of the lower end of the switching piston disk, and one side of the piston of the second piston rod is movably inserted into the lifting groove.

[0014] Preferably, an input air groove is provided at the center of one side of the jacking groove and passes through the descending impact seat, and diversion air grooves are provided on both sides of the input air groove and pass through the descending impact seat respectively. A high-pressure air supply pipe and a stagnation air pipe are respectively connected to one side of the input air groove and the diversion air groove that pass through the descending impact seat, and a stagnation connecting sleeve is located on one side of the stagnation air ring and is connected to a stagnation air port, and one side of the two stagnation air pipes is respectively arranged corresponding to the two stagnation air ports.

[0015] Preferably, a diverter groove is horizontally opened in the upper end of the switching piston disk and connected to the hot gas active joint, a plurality of upper gas grooves are opened at the upper end of the diverter groove penetrating the switching piston disk, a plurality of gas one-way valves are opened at the lower end of the diverter groove penetrating the switching piston disk, the first annular groove and the second annular groove are respectively located on the upper and lower sides of the descending impact seat, the inner circumferences of the first annular groove and the second annular groove are respectively connected to the switching groove and are provided with a plurality of connecting grooves and a plurality of heat supply grooves, when the switching piston disk rises to the maximum extent, the switching piston disk blocks the plurality of connecting grooves, and when the switching piston disk descends to the maximum extent, the switching piston disk blocks the plurality of switching piston disks.

[0016] Preferably, the reverse thrust air groove is a conical structure, the diameter of one side of the reverse thrust air groove connected to the first annular groove is larger than the diameter of the other side, the diameter of the blowing heating ring is larger than the diameter of the impact contact block and the sample placement seat, the inner circumference of the blowing heating ring is a conical structure, the second annular groove is connected to the blowing heating ring, and one side of the conical structure of the blowing heating ring is inclined to point toward the elastic sample and is provided with a plurality of heating air holes.

[0017] Preferably, a guide sleeve is vertically provided on one side of the descending impact seat sleeved with the guide column, and a plurality of sliding balls are movably inserted on one side of the guide sleeve sleeved with the guide column.

[0018] Preferably, a hot air delivery pipe is provided on one side of the upper end of the electric heating box, and the hot air delivery pipe and the hot air movable joint are arranged correspondingly.

[0019] A test method using an adjustable high temperature and high acceleration impact table comprises the following steps:

[0020] Step 1: According to the test requirements, when the elastic sample placed on the sample placement seat is heated and the performance impact test is performed, the motor above the top plate drives the lifting screw to rotate. At this time, the lifting screw passes through the screw sleeve to lower the descending impact seat to a suitable height so that a number of heating pores point to the elastic sample;

[0021] Step 2: The high-pressure gas is sent into the lifting groove through the high-pressure gas supply pipe. The high-pressure gas enters the stagnant gas rings of the two stagnant connecting sleeves through the diverter gas groove, and then pushes the first piston rods to move to the side of the guide column, so that the descending impact seat remains stationary. As the air pressure in the lifting groove continues to increase, the second piston rod pushes the switching piston plate to rise, and the second piston rod blocks the connecting groove. The heat supply groove is connected with the switching groove. At this time, the electric heating box is started, and the high-pressure hot air flow is delivered to the hot gas active joint through the hot air supply pipe. After the high-pressure hot air flow enters the diverter groove, since the upper gas groove is blocked above the switching groove, the air flow pushes the gas one-way valves to enter the bottom of the switching groove. The hot air flow enters the second annular groove through the heat supply groove, and then quickly blows to the elastic sample from the heating air hole of the blowing heating ring to heat the elastic sample.

[0022] Step 3: After the elastic sample is heated, the high-pressure air supply pipe and the hot air movable joint stop inputting high-pressure airflow, the lifting support plate lifts the descending impact seat to an appropriate height, and similarly, the first piston rod is controlled to clamp the guide column and maintain a stagnant state, and the lifting support plate descends to the lowest position;

[0023] Step 4: When the lifting support plate drops to the lowest position and does not affect the descending test of the descending impact seat, the high-pressure air supply pipe stops inputting high-pressure gas, and the first piston rods release the abutment limit on the guide column, and the descending impact seat can fall downward. At this time, the hot air pipe sends high-pressure gas to the hot gas active joint. When the high-pressure gas enters the diversion groove, since there is no supporting force under the second piston rod, the high-pressure gas is pushed upward through the upper gas groove, the switching piston plate descends, the switching groove is connected with the connecting groove, and the high-pressure hot air flow sent by the hot gas active joint is ejected upward from the reverse thrust grooves of the first annular groove to accelerate the descent of the descending impact seat.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] When the test base needs to perform an impact test on the elastic sample, the elastic sample can be quickly heated by the cooperation of the airflow switching component and the heating component set in the descending impact seat. Then, during the falling impact test, combined with the stagnation component and the push-down auxiliary component, when the height of the entire test bench is designed to be short, the descending acceleration of the descending impact seat can still be adjusted through the reverse thrust of the high-speed airflow to meet more comprehensive impact test requirements. The operation is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle;

[0027] Figure 2 For the present invention Figure 1 Schematic diagram of part A;

[0028] Figure 3 It is a schematic diagram of the structure of the present invention from a second viewing angle;

[0029] Figure 4 For the present invention Figure 3 Schematic diagram of part B;

[0030] Figure 5 It is a schematic diagram of the local episiotomy structure of the present invention;

[0031] Figure 6 For the present invention Figure 5 Schematic diagram of the C part;

[0032] Figure 7 For the present invention Figure 5 Schematic diagram of the D part;

[0033] Figure 8 For the present invention Figure 7 Schematic diagram of part E;

[0034] Fig. 9 This is a schematic diagram of the structure of the input gas tank of the present invention;

[0035] Fig.10 For the present invention Fig. 9 Schematic diagram of the F site.

[0036] In the figure: test base 1, guide column 2, top plate 3, lifting screw 4, lifting support plate 5, descending impact seat 6, stagnation connecting sleeve 7, sample placement seat 8, elastic sample 9, impact contact block 10, blowing heating ring 11, switching groove 12, lifting groove 13, input gas groove 14, diverter gas groove 15, high-pressure gas supply pipe 16, stagnation gas pipe 17, stagnation gas ring 18, stagnation gas connection port 19, piston box 21, first piston rod 22, return spring 23, switching piston disc 24, second piston rod 25, hot gas movable joint 26, diverter groove 27, upper gas groove 28, gas one-way valve 29, first annular groove 30, connection groove 31, reverse thrust gas groove 32, second annular groove 33, heat supply groove 34, heating air hole 35, guide sleeve 36, sliding ball 37, electric heating box 38, hot gas supply pipe 39. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Please see attached Figure 1-10 , this application provides the following technical solutions.

[0039] Embodiment 1: An adjustable high-temperature and high-acceleration impact platform, including a test base platform 1, two guide columns 2 are vertically symmetrically provided on the upper end of the test base platform 1, a top plate 3 is horizontally provided on the upper ends of the two guide columns 2, a descending impact seat 6 is horizontally provided between the test base platform 1 and the top plate 3, a lifting component is provided on the side of the test base platform 1 close to the descending impact seat 6, the lifting component includes a lifting support plate 5, a sample placement seat 8 is provided at the center of the test base platform 1 below the descending impact seat 6, an elastic sample 9 is placed above the sample placement seat 8, an impact contact block 10 is provided on the side of the descending impact seat 6 close to the elastic sample 9, a lifting screw 4 is vertically provided between the top plate 3 and the test base platform 1, the lifting support plate 5 is arranged by movably sleeved with the lifting screw 4 through the screw rod, the lifting support plate 5 is U-shaped, the top plate 3 and the guide column 2 are staggered, the two sides of the two lifting support plates 5 are respectively in contact with the two sides of the lower end of the descending impact seat 6, a servo drive motor can be arranged above the top plate 3, when the height of the descending impact seat 6 needs to be adjusted, the lifting screw 4 can be driven by the motor to control the lifting support plate 5 to move up and down.

[0040] After the stagnation component is set to the desired position of the descending impact seat 6, when the lifting support plate 5 does not support the descending impact seat 6, the position of the descending impact seat 6 is self-positioned, and the stagnation component includes two stagnation connecting sleeves 7, and the two stagnation connecting sleeves 7 are vertically symmetrically arranged on both sides of the guide column 2 of the descending impact seat 6. The stagnation connecting sleeves 7 are movably sleeved on the guide column 2, and a stagnation air ring 18 is provided in the stagnation connecting sleeve 7. A plurality of piston boxes 21 are symmetrically provided on one side of the stagnation air ring 18 close to the guide column 2, and the plurality of piston boxes 21 are connected to the stagnation air ring 18. The first piston groove has a first piston rod 22 which is horizontally movable in the first piston groove, one side of the rod of the first piston rod 22 is movable through the stagnation air ring 18 and abuts against the side wall of the guide column 2, and one side of the rod of the first piston rod 22 located in the first piston groove is sleeved with a return spring 23, and the side of the first piston rod 22 in contact with the guide column 2 is an elastic rubber structure. When high-pressure gas is not injected into the stagnation air ring 18, the first piston rod 22 can be moved away from the guide column 2 through the return spring 23, and at this time, the lowered impact seat 6 can be used for a drop impact test.

[0041] An airflow switching component is provided to switch between the stagnation use and the hot airflow application of the stagnation connection sleeve 7. The airflow switching component is provided at the center of the descending impact seat 6. The airflow switching component includes a switching piston disc 24 and a second piston rod 25. A switching groove 12 is provided in the descending impact seat 6. The switching piston disc 24 is movably provided in the switching groove 12. The upper end of the switching groove 12 passes through the center of the descending impact seat 6 to provide an extension groove. A hot gas movable joint 26 is vertically provided at the upper end of the switching piston disc 24. The upper end of the hot gas movable joint 26 movably passes through the extension groove through a sealing ring. A lifting groove 13 is vertically provided at the center of the lower end of the switching groove 12. The second piston rod 25 is vertically provided at the center of the lower end of the switching piston disc 24. One side of the piston of the second piston rod 25 is movably inserted into the lifting groove 13. One side of the lifting groove 13 is provided with an input gas groove 14 at the center of the descending impact seat 6. The lifting groove 13 is provided with a shunt gas groove 15 on both sides of the input gas groove 14, which penetrates the descending impact seat 6 respectively. A high-pressure air supply pipe 16 and a stagnant air pipe 17 are respectively inserted on one side of the input gas groove 14 and the shunt gas groove 15 which penetrate the descending impact seat 6. The stagnation connecting sleeve 7 is located on one side of the stagnation gas ring 18 and is connected to a stagnation gas connection port 19, and one side of the two stagnation gas pipes 17 is respectively arranged corresponding to the two stagnation gas connection ports 19. When the high-pressure gas is fed into the high-pressure gas supply pipe 16, the high-pressure gas enters the lifting groove 13 through the input gas groove 14. At this time, the high-pressure gas in the lifting groove 13 enters the stagnation gas ring 18 connected to the stagnation gas connection port 19 through the shunt gas groove 15 and the stagnation gas pipe 17, and the plurality of first piston rods 22 are actively driven to achieve the clamping of the plurality of first piston rods 22 on the guide column 2, so as to keep the posture and position of the descending impact seat 6 stagnant.

[0042] In addition, when the second piston rod 25 drops to the lowest level, the aperture of the input gas groove 14 and the diverter gas groove 15 connecting the lifting groove 13 should be no less than one half, to ensure that the high-pressure gas pressure delivered by the high-pressure gas supply pipe 16 can enter the stagnant connecting sleeve 7 and push the second piston rod 25 up from the bottom.

[0043] A push-down auxiliary component and a heating component are set to increase the descending speed of the descending impact seat 6 and perform test heating treatment on the elastic sample 9. The push-down auxiliary component includes a first annular groove 30 and a plurality of reverse thrust gas grooves 32. The plurality of first annular grooves 30 are connected to one side of the switching groove 12. The heating component includes an electric heating box 38 and a blowing heating ring 11. The electric heating box 38 is vertically arranged on one side of the test base 1. The blowing heating ring 11 is arranged below the descending impact seat 6, and the blowing heating ring 11 is connected to one side of the switching groove 12. The upper end of the switching piston disk 24 is connected to the hot air active joint 26 and a diverter groove 27 is horizontally opened. The upper end of the diverter groove 27 penetrates the switching piston disk 24 to open a plurality of upper gas grooves 28. The lower end of the diverter groove 27 penetrates the switching piston disk 24 and is provided with a plurality of gas one-way valves 29. The first annular groove 3 0 and the second annular groove 33 are respectively located at the upper and lower sides of the descending impact seat 6, and the inner circumferential sides of the first annular groove 30 and the second annular groove 33 are respectively connected to the switching groove 12 and are provided with a plurality of connecting grooves 31 and a plurality of heat supply grooves 34. When the switching piston disc 24 rises to the maximum extent, the switching piston disc 24 blocks the plurality of connecting grooves 31, and when the switching piston disc 24 descends to the maximum extent, the switching piston disc 24 blocks the plurality of switching piston discs 24. A heat supply air pipe 39 is provided on one side of the upper end of the electric heating box 38, and the heat supply air pipe 39 is correspondingly arranged with the hot air movable joint 26. Through the up and down movement of the second piston rod 25, the hot air flow can enter the first annular groove 30 and the second annular groove 33 respectively, so as to realize the descending speed assistance of the descending impact seat 6 and the air flow heating of the elastic sample 9 respectively.

[0044] The reverse thrust groove 32 is a conical structure. The diameter of one side of the reverse thrust groove 32 connected to the first annular groove 30 is larger than the diameter of the other side. The diameter of the blowing heating ring 11 is larger than the diameter of the impact contact block 10 and the sample placement seat 8. The inner circumference of the blowing heating ring 11 is a conical structure. The second annular groove 33 is connected to the blowing heating ring 11, and one side of the conical structure of the blowing heating ring 11 is inclined to point to the elastic sample 9 and is provided with a plurality of heating air holes 35. The conical structure of the reverse thrust groove 32 can increase the reverse thrust force of the descending impact seat 6.

[0045] In the present embodiment: the high-pressure air supply pipe 16 delivers high-pressure gas into the lifting groove 13 to realize the rising and stagnating connecting sleeve 7 of the second piston rod 25 and the switching piston disk 24, and the clamping and positioning of the guide column 2. At this time, the hot air flow delivered by the hot air movable joint 26 is blown toward the elastic sample 9 through the blowing heating ring 11 to heat it. On the contrary, the high-pressure air supply pipe 16 stops inputting high-pressure gas, and the hot air movable joint 26 delivers high-pressure hot air flow, which is discharged from the first annular groove 30 and a plurality of reverse thrust grooves 32 to reversely push the descending impact seat 6, thereby increasing the descending acceleration of the descending impact seat 6, completing a short-range and high-acceleration impact test, and reducing the equipment footprint. The gas one-way valve 29 is a high-pressure air flow one-way valve commonly used in the prior art.

[0046] Embodiment 2: On the basis of embodiment 1, a guide sleeve 36 is vertically provided on one side of the descending impact seat 6 that is sleeved on the guide column 2, and a plurality of sliding balls 37 are movably inserted on one side of the guide sleeve 36 that is sleeved on the guide column 2. When the descending impact seat 6 descends, the loss and friction between the descending impact seat 6 and the guide column 2 are reduced, thereby improving the smoothness of the descent of the descending impact seat 6 and the accuracy of the test data.

[0047] A test method using an adjustable high temperature and high acceleration impact table comprises the following steps:

[0048] Step 1: According to the test requirements, when the elastic sample 9 placed on the sample placement seat 8 is subjected to a performance impact test after being heated, the motor on the top plate 3 drives the lifting screw 4 to rotate. At this time, the lifting screw 4 lowers the descending impact seat 6 to a suitable height through the screw sleeve, so that the plurality of heating air holes 35 point to the elastic sample 9;

[0049] Step 2: The high-pressure gas supply pipe 16 delivers high-pressure gas into the lifting groove 13, and the high-pressure gas enters the stagnant gas rings 18 of the two stagnant connecting sleeves 7 through the diverter gas groove 15, and then pushes the first piston rods 22 to move to the side of the guide column 2, so that the descending impact seat 6 remains stationary. As the air pressure in the lifting groove 13 continues to increase, the second piston rod 25 pushes the switching piston plate 24 to rise, and the second piston rod 25 blocks the connecting groove 31, and the heat supply groove 34 is connected with the switching groove 12. At this time, the electric heating box 38 is started, and the high-pressure hot gas flow is delivered to the hot gas active joint 26 through the hot gas supply pipe 39. After the high-pressure hot gas flow enters the diverter groove 27, since the upper gas groove 28 is blocked above the switching groove 12, the gas flow pushes the gas one-way valves 29 to enter the bottom of the switching groove 12, and the hot gas flow enters the second annular groove 33 through the heat supply groove 34, and then quickly blows to the elastic sample 9 from the heating air hole 35 of the blowing heating ring 11 to heat the elastic sample 9;

[0050] Step 3: After the elastic sample 9 is heated, the high-pressure air supply pipe 16 and the hot air movable joint 26 stop inputting high-pressure airflow, the lifting support plate 5 lifts the descending impact seat 6 to an appropriate height, and similarly, the first piston rod 22 is controlled to clamp the guide column 2 and maintain a stagnant state, and the lifting support plate 5 descends to the lowest position;

[0051] Step 4: When the lifting support plate 5 descends to the lowest position and does not affect the descending test of the descending impact seat 6, the high-pressure air supply pipe 16 stops inputting high-pressure gas, and the first piston rods 22 release the abutment limit on the guide column 2, and the descending impact seat 6 can fall downward. At this time, the hot air supply pipe 39 delivers high-pressure gas to the hot gas movable joint 26. When the high-pressure gas enters the diversion groove 27, since there is no supporting force under the second piston rod 25, the high-pressure gas is pushed upward through the upper gas groove 28, the switching piston plate 24 descends, the switching groove 12 is connected with the connecting groove 31, and the high-pressure hot air flow delivered by the hot gas movable joint 26 is ejected upward from the reverse thrust grooves 32 of the first annular groove 30, accelerating the descent of the descending impact seat 6.

[0052] 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. Adjustable high temperature and high acceleration impact table, characterized in that: include: A test platform (1), wherein two guide columns (2) are vertically symmetrically arranged at the upper end of the test platform (1), a top plate (3) is horizontally arranged at the upper ends of the two guide columns (2), a descending impact seat (6) is horizontally arranged between the test platform (1) and the top plate (3), a lifting assembly is arranged on the side of the test platform (1) close to the descending impact seat (6), the lifting assembly includes a lifting support plate (5), a sample placement seat (8) is arranged at the center of the test platform (1) below the descending impact seat (6), an elastic sample (9) is placed above the sample placement seat (8), and an impact contact block (10) is arranged on the side of the descending impact seat (6) close to the elastic sample (9); A stagnation component, the stagnation component comprising two stagnation connection sleeves (7), the two stagnation connection sleeves (7) being vertically symmetrically arranged on both sides of the guide column (2) sleeved by the descending impact seat (6); An airflow switching component, the airflow switching component is arranged at the center of the descending impact seat (6), the airflow switching component comprises a switching piston disc (24) and a second piston rod (25), a switching groove (12) is opened in the descending impact seat (6), and the switching piston disc (24) is movably arranged in the switching groove (12); A push-down auxiliary component, the push-down auxiliary component comprising a first annular groove (30) and a plurality of reverse thrust gas grooves (32), wherein the plurality of first annular grooves (30) are connected to one side of the switching groove (12); A heating component, wherein the heating component comprises an electric heating box (38) and a blowing heating ring (11), wherein the electric heating box (38) is vertically arranged on one side of the test base (1), and the blowing heating ring (11) is arranged below the descending impact seat (6), and the blowing heating ring (11) is connected to one side of the switching slot (12).

2. The adjustable high temperature and high acceleration impact table according to claim 1, characterized in that: A lifting screw (4) is vertically arranged between the top plate (3) and the test bottom platform (1), and the lifting support plate (5) is arranged by movably sleeved on the lifting screw (4) through the screw rod, and the lifting support plate (5) is in a U-shaped structure. The top plate (3) and the guide column (2) are staggered, and the two sides of the two lifting support plates (5) are respectively in contact with the two sides of the lower end of the descending impact seat (6).

3. The adjustable high temperature and high acceleration impact table according to claim 2, characterized in that: The stagnation connection sleeve (7) is movably sleeved on the guide column (2), a stagnation air ring (18) is provided in the stagnation connection sleeve (7), a plurality of piston boxes (21) are symmetrically provided on one side of the stagnation air ring (18) close to the guide column (2), a first piston groove is provided in each of the plurality of piston boxes (21) and connected to the stagnation air ring (18), a first piston rod (22) is movably provided in each of the first piston grooves, one side of the rod of the first piston rod (22) movably penetrates the stagnation air ring (18) and abuts against the side wall of the guide column (2), and a return spring (23) is sleeved on one side of the rod of the first piston rod (22) located in the first piston groove.

4. The adjustable high temperature and high acceleration impact table according to claim 3, characterized in that: The upper end of the switching groove (12) penetrates through the center of the descending impact seat (6) to form an extension groove, the upper end of the switching piston disc (24) is vertically provided with a hot gas movable joint (26), the upper end of the hot gas movable joint (26) movably penetrates the extension groove through a sealing ring, the lower end of the switching groove (12) is vertically provided with a lifting groove (13), the second piston rod (25) is vertically arranged at the center of the lower end of the switching piston disc (24), and one side of the piston of the second piston rod (25) is movably inserted into the lifting groove (13).

5. The adjustable high temperature and high acceleration impact table according to claim 4, characterized in that: An input gas groove (14) is provided at the center of one side of the lifting groove (13) and penetrates the descending impact seat (6); diversion gas grooves (15) are provided on both sides of the input gas groove (14) and penetrate the descending impact seat (6); a high-pressure air supply pipe (16) and a stagnant air pipe (17) are respectively inserted and provided on one side of the input gas groove (14) and the diversion gas groove (15) that penetrate the descending impact seat (6); a stagnant air connection sleeve (7) is located on one side of the stagnant air ring (18) and is connected to a stagnant air connection port (19), and one side of the two stagnant air pipes (17) is respectively provided corresponding to the two stagnant air connection ports (19).

6. The adjustable high temperature and high acceleration impact table according to claim 5, characterized in that: The upper end of the switching piston disc (24) is connected to the hot gas movable joint (26) and is horizontally provided with a diverter groove (27). The upper end of the diverter groove (27) penetrates the switching piston disc (24) and is provided with a plurality of upper gas grooves (28). The lower end of the diverter groove (27) penetrates the switching piston disc (24) and is provided with a plurality of gas one-way valves (29). The first annular groove (30) and the second annular groove (33) are respectively located at the upper and lower sides of the descending impact seat (6). The inner circumferences of the first annular groove (30) and the second annular groove (33) are respectively connected to the switching groove (12) and are provided with a plurality of connection grooves (31) and a plurality of heat supply grooves (34). When the switching piston disc (24) rises to the maximum extent, the switching piston disc (24) blocks the plurality of connection grooves (31). When the switching piston disc (24) descends to the maximum extent, the switching piston disc (24) blocks the plurality of switching piston discs (24).

7. The adjustable high temperature and high acceleration impact table according to claim 6, characterized in that: The reverse thrust groove (32) is a conical structure. The diameter of one side of the reverse thrust groove (32) connected to the first annular groove (30) is larger than the diameter of the other side. The diameter of the blowing heating ring (11) is larger than the diameters of the impact contact block (10) and the sample placement seat (8). The inner circumference of the blowing heating ring (11) is a conical structure. The second annular groove (33) is connected to the blowing heating ring (11). One side of the conical structure of the blowing heating ring (11) is inclined to point toward the elastic sample (9) and is provided with a plurality of heating air holes (35).

8. The adjustable high temperature and high acceleration impact platform according to claim 7, characterized in that: A guide sleeve (36) is vertically provided on one side of the descending impact seat (6) sleeved with the guide column (2), and a plurality of sliding balls (37) are movably inserted on one side of the guide sleeve (36) sleeved with the guide column (2).

9. The adjustable high temperature and high acceleration impact platform according to claim 8, characterized in that: A hot air delivery pipe (39) is provided on one side of the upper end of the electric heating box (38), and the hot air delivery pipe (39) is arranged corresponding to the hot air movable joint (26).

10. A test method using the adjustable high temperature and high acceleration impact table according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: According to the test requirements, when the elastic sample (9) placed above the sample placement seat (8) is subjected to a performance impact test after being heated, the motor above the top plate (3) drives the lifting screw (4) to rotate, and at this time, the lifting screw (4) lowers the descending impact seat (6) to a suitable height through the screw sleeve, so that the plurality of heating air holes (35) point to the elastic sample (9); Step 2: The high-pressure gas supply pipe (16) supplies high-pressure gas into the lifting groove (13). The high-pressure gas enters the stagnant gas ring (18) of the two stagnant connecting sleeves (7) through the diverter gas groove (15), thereby pushing the first piston rods (22) to move toward the side of the guide column (2), so that the descending impact seat (6) remains stationary. As the gas pressure in the lifting groove (13) continues to increase, the second piston rod (25) pushes the switching piston plate (24) to rise, and the second piston rod (25) blocks the connecting groove (31), and the heat supply groove (34) and the switching groove (12) are connected. The electric heating box (38) is started, and a high-pressure hot air flow is delivered to the hot air movable joint (26) through the hot air delivery pipe (39). After the high-pressure hot air flow enters the diversion groove (27), since the upper gas groove (28) is blocked by the upper part of the switching groove (12), the air flow pushes a plurality of gas one-way valves (29) to enter the lower part of the switching groove (12). The hot air flow enters the second annular groove (33) through the heat delivery groove (34), and then quickly blows toward the elastic sample (9) from the heating air hole (35) of the blowing heating ring (11), thereby heating the elastic sample (9); Step 3: After the elastic sample (9) is heated, the high-pressure air supply pipe (16) and the hot air movable joint (26) stop inputting high-pressure airflow, the lifting support plate (5) lifts the descending impact seat (6) to an appropriate height, and similarly controls the first piston rod (22) to clamp the guide column (2) and maintain a stationary state, and the lifting support plate (5) descends to the lowest position; Step 4: When the lifting support plate (5) is lowered to the lowest position and does not affect the descending test of the descending impact seat (6), the high-pressure air supply pipe (16) stops inputting high-pressure gas, and the plurality of first piston rods (22) release the abutment limit on the guide column (2), and the descending impact seat (6) can fall downward. At this time, the hot air supply pipe (39) sends high-pressure gas to the hot air movable joint (26). When the high-pressure gas enters the diversion groove (27), since there is no supporting force below the second piston rod (25), the high-pressure gas is pushed upward through the upper gas groove (28), the switching piston plate (24) descends, the switching groove (12) is connected with the connecting groove (31), and the high-pressure hot air flow sent by the hot air movable joint (26) is ejected upward from the plurality of reverse thrust gas grooves (32) of the first annular groove (30), accelerating the descent of the descending impact seat (6).

Images