Adjustable test tube rack for physical experiment

Abstract

The invention provides an adjustable test tube rack for physical experiments, and belongs to the technical field of test tube racks. The adjustable test tube rack for the physical experiment comprises a bottom plate and an adjusting clamping mechanism, a mounting frame is mounted at the top of the bottom plate, a placement plate is mounted on the inner side of the mounting frame, a placement hole is formed in the top of the placement plate, supporting adjusting mechanisms are arranged on the two sides of the mounting frame, and a mounting cavity is formed in the inner wall of the placement hole; the first mounting plate is arranged on the inner wall of the mounting cavity, a first spring is mounted on the surface of the first mounting plate, the clamping seat is mounted at the end, away from the first mounting plate, of the first spring, and the extrusion mechanism is arranged on the inner wall of the mounting cavity. The clamping mechanism is adjusted to clamp the test tubes placed in the placing holes, so that shaking of the test tubes due to the fact that the diameters of the test tubes are smaller than the diameters of the placing holes when the test tube rack is moved is avoided, and the stability of the test tubes during placing is improved.

Description

Technical Field

[0001] The invention relates to the technical field of test tube racks, in particular to an adjustable test tube rack for physical experiments. Background Art

[0002] In physical experiments, the necessity of test tube racks is reflected in the stability, safety and convenience they provide for experiments. Physical experiments often involve the operation of test tubes, such as heating liquids, observing reaction phenomena or measuring physical parameters. In addition, test tube racks can store multiple test tubes at the same time, which is convenient for sorting and classification before and after the experiment, and improves experimental efficiency. Whether it is a simple heat conduction experiment or a complex chemical reaction observation, test tube racks are important tools to ensure the smooth progress of the experiment. Therefore, test tube racks are not only auxiliary equipment in physical experiments, but also an important guarantee for experimental safety and accuracy.

[0003] However, the test tube placement holes of the test tube rack in the prior art have a fixed diameter, and the number of placement holes with different diameters is fixed, resulting in the need to place more test tube racks on the operating table when placing a large number of test tubes with the same diameter. This not only affects the operation during the experiment, but also wastes the time required to place the test tubes after the placement position of the test tube rack is changed. When the test tube is placed in a place where the diameter of the test tube differs greatly from the diameter of the placement hole, the test tube and the test tube rack may collide during transportation. Summary of the invention

[0004] In order to make up for the above deficiencies, the present invention provides an adjustable test tube rack for physical experiments that overcomes the above technical problems or at least partially solves the above problems.

[0005] The present invention is achieved in that:

[0006] The present invention provides an adjustable test tube rack for physical experiments, comprising a bottom plate, a mounting frame installed on the top of the bottom plate, a placement plate installed on the inner side of the mounting frame, a placement hole opened on the top of the placement plate, a plurality of placement holes opened, and support adjustment mechanisms are arranged on both sides of the mounting frame;

[0007] Adjust the clamping mechanism, the clamping adjustment mechanism comprises:

[0008] An installation cavity, the installation cavity is opened on the inner wall of the placement hole;

[0009] A first mounting plate, wherein the first mounting plate is arranged on the inner wall of the mounting cavity, and a first spring is installed on the surface of the first mounting plate;

[0010] A clamping seat, the clamping seat is mounted on an end of the first spring away from the first mounting plate;

[0011] The extrusion mechanism is arranged on the inner wall of the installation cavity.

[0012] In a preferred embodiment, the extrusion mechanism includes a first sliding groove, which is opened at the bottom of the placement plate, and a first extrusion block is slidably installed on the inner wall of the first sliding groove. First movable grooves are opened on both sides of the inner wall of the first sliding groove, and first movable blocks slidably matched with the first movable grooves are installed on both sides of the first extrusion block. A movable frame is arranged on the front side of the placement plate, and the movable frame is connected to the first extrusion block.

[0013] In a preferred embodiment, the support and adjustment mechanism includes a second mounting plate, which is mounted on both sides of the base plate, a rotating member is mounted on the front side of the second mounting plate, and toothed plates are mounted on both sides of the mounting frame, a connecting rod is mounted on the inner side of the rotating member, and a limiting member is mounted on the outer side of the second mounting plate.

[0014] In a preferred solution, a mounting frame located at the bottom of the first sliding groove is installed at the bottom of the placement plate, and second movable grooves connected to the first movable groove are opened on both sides of the inner wall of the mounting frame, and a second spring is installed at the bottom of the inner wall of the mounting frame, and the top of the second spring is connected to the bottom of the first movable block.

[0015] In a preferred solution, a placement groove is provided at the bottom of the inner wall of the mounting frame, and the placement groove is located at the bottom of the placement hole. A first mounting groove is provided at the bottom of the inner wall of the mounting frame, and the first mounting groove is located on both sides of the placement groove.

[0016] In a preferred solution, a movable frame located above the placement slot is provided on the top of the mounting frame, a supporting arc plate is installed on the top of the movable frame, pushing blocks are installed on both sides of the movable frame, and a first tension spring is installed on the front side of the inner wall of the first mounting slot, the rear end of the first tension spring is connected to the pushing block, and a first magnetic block is installed on the rear side of the inner wall of the first mounting slot.

[0017] In a preferred solution, a third movable groove connected to the second movable groove is provided on both sides of the mounting frame, and an extrusion plate connected to the first extrusion block is slidably installed on the inner wall of the third movable groove, a connecting frame is installed on the outer side of the extrusion plate, and an extrusion rod is installed at the bottom of the connecting frame, an extrusion cylinder is provided at the bottom of the extrusion rod, and the extrusion rod is inserted into the inner cavity of the extrusion cylinder, and a second extrusion block is installed at the bottom of the extrusion cylinder.

[0018] In a preferred solution, a connecting frame is installed on the back of the connecting frame, and the connecting frame is U-shaped. A traction rope is installed on the bottom of the connecting frame, and one end of the traction rope away from the connecting frame is connected to the back of the supporting arc plate.

[0019] In a preferred solution, a mounting seat located behind the placement slot is installed on the top of the mounting frame, and a guide wheel is installed on the inner side of the mounting seat, and the traction rope is wound around the bottom of the guide wheel.

[0020] In a preferred solution, a fixing plate is installed at the bottom of the front side of the mounting frame, rotating rods are rotatably installed on both sides of the fixing plate, and a limiting frame is threadedly connected to the surface of the rotating rod, and the limiting frame is arranged in an L shape, and a limiting plate is installed at the bottom of the fixing plate.

[0021] The invention provides an adjustable test tube rack for physical experiments, which has the following beneficial effects:

[0022] 1. By setting up an adjustable clamping mechanism, when the adjustable clamping mechanism is squeezed, the adjustable clamping mechanism can clamp the test tube placed in the placement hole, thereby avoiding the shaking of the test tube due to the diameter of the test tube being smaller than the diameter of the placement hole when the test tube rack is moved, thereby improving the stability of the test tube when placed.

[0023] 2. By setting up a support adjustment mechanism, the mounting frame can be adjusted to a higher level, thereby facilitating the user to take the test tubes placed on the test tube rack, and experimental tools can be placed between the mounting frame and the base plate, so that the test tubes and tools can be taken together. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a stereogram provided by an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of a placement plate provided in an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of a partial three-dimensional cross-sectional structure of a placement plate provided in an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of a partial three-dimensional structure of a mounting frame provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a three-dimensional structure of a connection frame provided in an embodiment of the present invention;

[0030] Figure 6A schematic diagram of a three-dimensional structure of a fixing plate provided in an embodiment of the present invention;

[0031] Figure 7 A schematic diagram of a three-dimensional cross-sectional structure of a second mounting plate provided in an embodiment of the present invention;

[0032] In the figure: 1, bottom plate; 2, mounting frame; 3, placement plate; 4, placement hole; 5, mounting cavity; 6, first mounting plate; 7, first spring; 8, clamping seat; 9, first sliding groove; 10, first extrusion block; 11, first moving groove; 12, first moving block; 13, moving frame; 14, second mounting plate; 15, rotating member; 16, tooth plate; 17, connecting rod; 18, limiting member; 19, mounting frame; 20, second moving groove; 21, second spring; 2 2. Placement slot; 23. First installation slot; 24. Moving frame; 25. Support arc plate; 26. Push block; 27. First tension spring; 28. First magnetic block; 29. ​​Third moving slot; 30. Extrusion plate; 31. Connecting frame; 32. Extrusion rod; 33. Extrusion cylinder; 34. Second extrusion block; 35. Connecting frame; 36. Traction rope; 37. Mounting seat; 38. Guide wheel; 39. Fixed plate; 40. Rotating rod; 41. Limiting frame; 42. Limiting plate. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0034] Reference Figure 1-Figure 7 The present invention provides a technical solution: an adjustable test tube rack for physical experiments, comprising a bottom plate 1 and an adjusting clamping mechanism, a mounting frame 2 is installed on the top of the bottom plate 1, a placing plate 3 is installed on the inner side of the mounting frame 2, and a placing hole 4 is opened on the top of the placing plate 3, and a plurality of placing holes 4 are opened, and supporting and adjusting mechanisms are arranged on both sides of the mounting frame 2, which can clamp the test tube in the placing hole 4 by moving the adjusting clamping mechanism after the test tube is placed in the placing hole 4, thereby improving the stability of the test tube clamping.

[0035] Reference Figure 1-Figure 3In a preferred embodiment, an adjustable clamping mechanism is provided, the adjustable clamping mechanism includes a mounting cavity 5, a first mounting plate 6, a first spring 7, a clamping seat 8 and a squeezing mechanism, the mounting cavity 5 is provided on the inner wall of the placement hole 4, the first mounting plate 6 is provided on the inner wall of the mounting cavity 5, and a first spring 7 is provided on the surface of the first mounting plate 6, the clamping seat 8 is provided on an end of the first spring 7 away from the first mounting plate 6, the squeezing mechanism is provided on the inner wall of the mounting cavity 5, the first spring 7 can squeeze the clamping seat 8, so that the clamping seat 8 clamps the test tube in the placement hole 4, and avoids the test tube from shaking when the test tube rack is moved, and the squeezing mechanism includes a first sliding groove 9, the first sliding groove 9 is provided on the bottom of the placement plate 3, and a first sliding groove 9 is slidably provided on the inner wall of the first sliding groove 9 Extrusion block 10, first moving grooves 11 are provided on both sides of the inner wall of the first sliding groove 9, and first moving blocks 12 that slide and cooperate with the first moving grooves 11 are installed on both sides of the first extrusion block 10. A moving frame 13 is provided on the front of the placement plate 3, and the moving frame 13 is connected to the first extrusion block 10. By moving the moving frame 13, the moving frame 13 can drive the first extrusion block 10 to squeeze the first mounting plate 6, thereby increasing the clamping force of the clamping seat 8 on the test tube, and can clamp the test tube more firmly. It is worth noting here that the rear side of the top of the first extrusion block 10 is inclined, so that when the first extrusion block 10 is moved, the first mounting plate 6 is squeezed by the inclined surface of the first extrusion block 10, and the first mounting plate 6 can be moved.

[0036] In addition, a mounting frame 19 located at the bottom of the first sliding groove 9 is installed at the bottom of the placement plate 3, and second movable grooves 20 connected to the first movable groove 11 are opened on both sides of the inner wall of the mounting frame 19, and a second spring 21 is installed at the bottom of the inner wall of the mounting frame 19, and the top of the second spring 21 is connected to the bottom of the first movable block 12, so that after the mounting frame 19 installs the second spring 21, when the first extrusion block 10 squeezes the first mounting plate 6, the first spring 7 limits the first extrusion block 10 to prevent the first extrusion block 10 from sliding downward, and the first extrusion block 10 can be kept tightly against the first mounting plate 6.

[0037] Reference Figure 1 and Figure 7In a preferred embodiment, the support and adjustment mechanism includes a second mounting plate 14, which is mounted on both sides of the base plate 1, a rotating member 15 is mounted on the front of the second mounting plate 14, and toothed plates 16 are mounted on both sides of the mounting frame 2, a connecting rod 17 is mounted on the inner side of the rotating member 15, and a limiting member 18 is mounted on the outer side of the second mounting plate 14, the rotating member 15 includes a rotating rod and a gear, which can drive the toothed plate 16 to move when the rotating rod is rotated, and drive the mounting frame 2 to move upward or downward through the toothed plate 16, and the connecting rod 17 can connect the two groups of rotating members 15, and can drive the rotating member 15 on the other side to rotate when one group of rotating members 15 is rotated, thereby moving the mounting frame 2 upward, and the limiting member 18 includes a plug-in slot, a plug-in block, a connecting plate, a limiting rod and a limiting member. The slot is arranged on the surface of the rotating rod, the plug-in block is plugged into and matched with the plug-in slot, the limit slot is arranged on the surface of the second mounting plate 14, the limit rod is plugged into and matched with the limit slot, and the plug-in block and the limit rod are both mounted on the surface of the connecting plate, and the connecting plate can be pulled outward before the rotating member 15 is rotated, so that the connecting plate drives the limit rod to move, and the connecting plate drives the plug-in block and the limit rod to move outward and separate from the plug-in slot and the limit slot respectively, thereby canceling the limiting of the limit rod, thereby facilitating the rotation of the rotating rod, and the plug-in block and the limit rod can also be inserted into the plug-in slot and the limit slot after the rotating rod is rotated, thereby limiting the rotating rod, avoiding the mounting frame 2 from sliding down after the height of the mounting frame 2 is adjusted, and the height of the mounting frame 2 can be adjusted, thereby facilitating the taking of the test tube in the test tube rack.

[0038] Reference Figure 1-Figure 5 In a preferred embodiment, a placement groove 22 is provided at the bottom of the inner wall of the mounting frame 2, and the placement groove 22 is located at the bottom of the placement hole 4. A first installation groove 23 is provided at the bottom of the inner wall of the mounting frame 2, and the first installation groove 23 is located on both sides of the placement groove 22, so that after the test tube is inserted into the placement hole 4, the bottom of the test tube can be located in the placement groove 22, and a moving frame 24 located above the placement groove 22 is provided at the top of the mounting frame 2, a supporting arc plate 25 is installed at the top of the moving frame 24, and pushing blocks 26 are installed on both sides of the moving frame 24, and A first tension spring 27 is installed on the front side of the inner wall of the first installation groove 23, and the rear end of the first tension spring 27 is connected to the pushing block 26, and a first magnetic block 28 is installed on the rear side of the inner wall of the first installation groove 23, so that the pushing block 26 can be pulled by the first tension spring 27 after being separated from the first magnetic block 28, so that the pushing block 26 can drive the bottom of the test tube to tilt through the moving frame 24, thereby facilitating the addition of liquid or solid by tilting the test tube, saving the time of manually tilting the test tube or taking out the test tube to tilt it, and improving the convenience when adding items.

[0039] In addition, both sides of the mounting frame 19 are provided with a third moving groove 29 connected to the second moving groove 20, and an extrusion plate 30 connected to the first extrusion block 10 is slidably installed on the inner wall of the third moving groove 29, and a connecting frame 31 is installed on the outer side of the extrusion plate 30, and an extrusion rod 32 is installed at the bottom of the connecting frame 31, and an extrusion cylinder 33 is provided at the bottom of the extrusion rod 32, and the extrusion rod 32 is inserted in the inner cavity of the extrusion cylinder 33, and a second extrusion block 34 is installed at the bottom of the extrusion cylinder 33, and the bottom of the second extrusion block 34 is inclined, and the rear side of the top of the pushing block 26 is inclined. When the extrusion plate 30 is squeezed and moved downward, the extrusion cylinder 33 can be squeezed by the connection and the extrusion rod 32, so that when the extrusion cylinder 33 drives the second extrusion block 34 to move downward, the inclined surface of the pushing block 26 is squeezed against the inclined surface of the pushing block 26, so as to facilitate the separation of the pushing block 26 and the first magnetic attraction block 28, and enable the first tension spring 27 to pull the pushing block 26.

[0040] Reference Figure 1-Figure 5 In a preferred embodiment, a connecting frame 35 is installed on the back of the connecting frame 31, and the connecting frame 35 is U-shaped. A traction rope 36 is installed at the bottom of the connecting frame 35, and the end of the traction rope 36 away from the connecting frame 35 is connected to the back of the supporting arc plate 25. A mounting seat 37 located behind the placement groove 22 is installed on the top of the mounting frame 2, and a guide wheel 38 is installed on the inner side of the mounting seat 37. The traction rope 36 is wound around the bottom of the guide wheel 38, so that the guide wheel 38 can guide the pulling direction of the traction rope 36. When the connecting frame 31 moves, the traction rope 36 can be pulled by the connecting frame 35, which makes it easier for the traction rope 36 to pull the supporting arc plate 25, and the test tube in a downward inclined state can be pulled to a vertical state.

[0041] Reference Figure 1 and Figure 6 In a preferred embodiment, a fixing plate 39 is installed at the bottom of the front side of the mounting frame 19, and rotating rods 40 are rotatably installed on both sides of the fixing plate 39, and a limiting frame 41 is threadedly connected to the surface of the rotating rod 40, and the limiting frame 41 is L-shaped, and a limiting plate 42 is installed at the bottom of the fixing plate 39, which can drive the limiting frame 41 to move when the rotating rod 40 is rotated, so that the movable frame 13 moved above the fixing plate 39 is limited, and the top of the limiting plate 42 is in contact with the bottom of the limiting frame 41, which can limit the limiting frame 41, so that the rotation of the rotating rod 40 drives the limiting frame 41 to move stably.

[0042] Specifically, the working process or working principle of the adjustable test tube rack for physical experiments is as follows: when in use, the test tube is first inserted into the placement hole 4, and the bottom of the test tube is inserted into the movable frame 24. At this time, the test tube is tilted, which can facilitate the user to add liquid or solid for the experiment into the test tube, and avoid the solid from falling directly to the bottom of the test tube when adding, causing collision to the test tube, making the experiment more standardized. When it is necessary to adjust the height of the mounting frame 2, the rotating member 15 is pulled outward and removed, and the rotating member 15 is rotated, and the rotating member 15 drives the toothed plate 16 to move , the tooth plate 16 can drive the mounting frame 2 to move, move the mounting frame 2 upward, adjust the height of the mounting frame 2, and insert the limiting member 18 into the second mounting plate 14 and the rotating member 15 to limit the rotating member 15 after the height of the mounting frame 2 is adjusted, so as to facilitate the addition of liquid or solid to the test tube when conducting physical experiments, and can also place the reagent box and the like in the gap between the mounting frame 2 and the bottom plate 1 when transporting the test tube, so that small experimental tools can be transported while transporting the test tube rack, saving the time of individually taking and transporting small experimental tools.

[0043] When it is necessary to clamp and limit the test tube, the rotating rod 40 is rotated so that the rotating rod 40 drives the limiting frame 41 to move outward, and the limiting frame 41 is separated from the moving frame 13. The first extrusion block 10 is moved by moving the moving frame 13 upward, so that the inclined surface of the first extrusion block 10 can be squeezed against the first mounting plate 6, and the first mounting plate 6 moves in the direction of the placement hole 4. The clamping seat 8 is squeezed by the first spring 7 so that the clamping seat 8 clamps the test tube in the placement hole 4, thereby limiting the test tube, and when the first extrusion block 10 is moved upward, the connecting frame 31 can be driven to move, and the connecting frame 31 drives the extrusion rod 32 and the extrusion cylinder 33 to move upward, so that the extrusion cylinder 33 drives The second squeezing block 34 moves upward and separates from the first magnetic block 28, and can also drive the connecting frame 35 to move when the connecting frame 31 moves, so that the connecting frame 35 pulls the traction rope 36, and the traction rope 36 pulls the supporting arc plate 25, and the inclined part of the bottom of the test tube is pulled by the movement of the supporting arc plate 25 and the moving frame 24, so that the test tube is pulled to a vertical state, and the pushing block 26 is adsorbed with the first magnetic block 28, and when the moving frame 24 squeezes the test tube to a vertical state, the clamping seat 8 can also push the test tube, so that the clamping seat 8 clamps the test tube when the test tube is squeezed to a vertical state, thereby preventing the test tube from shaking when the test tube rack is carried when the diameter of the test tube is small.

Claims

1. An adjustable test tube rack for physical experiments, comprising a bottom plate (1), characterized in that: A mounting frame (2) is installed on the top of the bottom plate (1), a placement plate (3) is installed on the inner side of the mounting frame (2), and a placement hole (4) is opened on the top of the placement plate (3), and a plurality of placement holes (4) are opened, and support adjustment mechanisms are arranged on both sides of the mounting frame (2); Adjust the clamping mechanism, the clamping adjustment mechanism comprises: An installation cavity (5), wherein the installation cavity (5) is formed on the inner wall of the placement hole (4); A first mounting plate (6), the first mounting plate (6) being arranged on the inner wall of the mounting cavity (5), and a first spring (7) being mounted on the surface of the first mounting plate (6); A clamping seat (8), the clamping seat (8) being mounted on an end of the first spring (7) away from the first mounting plate (6); A squeezing mechanism is arranged on the inner wall of the installation cavity (5).

2. The adjustable test tube rack for physical experiments according to claim 1, characterized in that: The extrusion mechanism comprises a first sliding groove (9), the first sliding groove (9) is arranged at the bottom of the placement plate (3), a first extrusion block (10) is slidably mounted on the inner wall of the first sliding groove (9), first movable grooves (11) are arranged on both sides of the inner wall of the first sliding groove (9), and first movable blocks (12) slidably matched with the first movable grooves (11) are mounted on both sides of the first extrusion block (10), a movable frame (13) is arranged on the front of the placement plate (3), and the movable frame (13) is connected to the first extrusion block (10).

3. The adjustable test tube rack for physical experiments according to claim 1, characterized in that: The support adjustment mechanism comprises a second mounting plate (14), the second mounting plate (14) being mounted on both sides of the base plate (1), a rotating member (15) being mounted on the front side of the second mounting plate (14), and toothed plates (16) being mounted on both sides of the mounting frame (2), a connecting rod (17) being mounted on the inner side of the rotating member (15), and a limiting member (18) being mounted on the outer side of the second mounting plate (14).

4. The adjustable test tube rack for physical experiments according to claim 2, characterized in that: The bottom of the placement plate (3) is provided with a mounting frame (19) located at the bottom of the first sliding groove (9), and both sides of the inner wall of the mounting frame (19) are provided with second movable grooves (20) connected to the first movable groove (11), and the bottom of the inner wall of the mounting frame (19) is provided with a second spring (21), and the top end of the second spring (21) is connected to the bottom of the first movable block (12).

5. The adjustable test tube rack for physical experiments according to claim 4, characterized in that: A placement groove (22) is provided at the bottom of the inner wall of the mounting frame (2), and the placement groove (22) is located at the bottom of the placement hole (4). A first installation groove (23) is provided at the bottom of the inner wall of the mounting frame (2), and the first installation groove (23) is located on both sides of the placement groove (22).

6. The adjustable test tube rack for physical experiments according to claim 5, characterized in that: A movable frame (24) located above the placement slot (22) is arranged at the top of the mounting frame (2), a supporting arc plate (25) is installed at the top of the movable frame (24), pushing blocks (26) are installed on both sides of the movable frame (24), and a first tension spring (27) is installed on the front side of the inner wall of the first mounting slot (23), the rear end of the first tension spring (27) is connected to the pushing block (26), and a first magnetic attraction block (28) is installed on the rear side of the inner wall of the first mounting slot (23).

7. The adjustable test tube rack for physical experiments according to claim 6, characterized in that: Both sides of the installation frame (19) are provided with a third movable groove (29) connected to the second movable groove (20), and an extrusion plate (30) connected to the first extrusion block (10) is slidably installed on the inner wall of the third movable groove (29), a connecting frame (31) is installed on the outer side of the extrusion plate (30), and an extrusion rod (32) is installed at the bottom of the connecting frame (31), an extrusion cylinder (33) is arranged at the bottom of the extrusion rod (32), and the extrusion rod (32) is inserted into the inner cavity of the extrusion cylinder (33), and a second extrusion block (34) is installed at the bottom of the extrusion cylinder (33).

8. The adjustable test tube rack for physical experiments according to claim 7, characterized in that: A connecting frame (35) is installed on the back of the connecting frame (31), and the connecting frame (35) is arranged in a U shape. A traction rope (36) is installed on the bottom of the connecting frame (35), and one end of the traction rope (36) away from the connecting frame (35) is connected to the back of the supporting arc plate (25).

9. The adjustable test tube rack for physical experiments according to claim 8, characterized in that: A mounting seat (37) located behind the placement slot (22) is installed on the top of the mounting frame (2), and a guide wheel (38) is installed on the inner side of the mounting seat (37), and the traction rope (36) is wound around the bottom of the guide wheel (38).

10. The adjustable test tube rack for physical experiments according to claim 4, characterized in that: A fixing plate (39) is installed at the bottom of the front side of the installation frame (19), rotating rods (40) are rotatably installed on both sides of the fixing plate (39), and a limiting frame (41) is threadedly connected to the surface of the rotating rod (40), and the limiting frame (41) is arranged in an L shape, and a limiting plate (42) is installed at the bottom of the fixing plate (39).

Images