Liquid nitrogen container electric carrying cart for chemical laboratory

Abstract

The utility model belongs to the technical field of liquid nitrogen tank carrying, and provides a liquid nitrogen tank electric carrying cart for a chemical laboratory, which comprises a bearing frame, the top of the bearing frame is fixedly connected with a bearing plate, the outer wall of the bearing plate is fixedly connected with a fixed seat, the top of the fixed seat is fixedly connected with an electric hydraulic cylinder, and the top of the electric hydraulic cylinder is fixedly connected with a motor. A hook is fixedly connected to the output end of the electric hydraulic cylinder, a limiting groove is formed in the top of the bearing plate, and the side wall of the hook is slidably connected with the inner wall of the limiting groove. The guide sliding rods drive the rubber clamping blocks to be tightly attached to the outer surface of the liquid nitrogen tank body, clamping and fixing are achieved, the rubber clamping blocks are made of rubber materials, the good friction performance and the good buffering effect are achieved, the liquid nitrogen tank can be effectively prevented from sliding and falling off, and multi-direction and multi-layer stable clamping and locking of the liquid nitrogen tank body are achieved; and the safety and the reliability in the carrying process are obviously improved.

Description

Technical Field

[0001] This utility model belongs to the field of liquid nitrogen tank handling technology, and specifically relates to an electric handling trolley for liquid nitrogen tanks used in chemical laboratories. Background Technology

[0002] Liquid nitrogen tanks are cryogenic containers widely used in biomedicine, scientific research, animal husbandry, clinical medicine, and aerospace. They are used to store cell tissues, blood samples, vaccines, seeds, and various biological materials. Due to the extremely low temperature of liquid nitrogen, liquid nitrogen tanks are usually designed with vacuum insulation to ensure safety and thermal insulation performance. However, with the diversification of usage scenarios and the expansion of storage capacity, the size and weight of liquid nitrogen tanks have also increased, which has brought great difficulties to their handling and movement in laboratories, hospitals, factories, and other places.

[0003] In existing technologies (application number CN215361492U, patent name 202121532535.5, a liquid nitrogen tank transport device), the tank can be transported without manual handling using a lifting assembly, and it is universally applicable to tanks of different heights. This device, due to its fixed frame, will not tilt or sway during transport, reducing leakage of the contents. However, in implementing this technical solution, the inventors discovered at least the following problems in the existing technology:

[0004] In the existing technology, some transport trolleys use a snap-on fixing structure to position and fix liquid nitrogen tanks to prevent them from shifting or tipping over during transportation. However, in practical applications, it has been found that when the transport path has complex road conditions such as unevenness, tile joints, thresholds, or slope differences, vibration can easily cause the snap-on to loosen or even detach from the liquid nitrogen tank.

[0005] Therefore, it is necessary to design an electric trolley for transporting liquid nitrogen tanks in chemical laboratories to solve the above-mentioned technical problems. Summary of the Invention

[0006] To solve the above technical problems, this utility model proposes an electric transport trolley for liquid nitrogen tanks in chemical laboratories, which can avoid the problem of vibration causing the buckles to loosen or even detach from the liquid nitrogen tank.

[0007] The technical solution of this utility model is:

[0008] This utility model proposes an electric transport trolley for liquid nitrogen tanks in chemical laboratories, including a support frame, a support plate fixedly connected to the top of the support frame, a fixing seat fixedly connected to the outer wall of the support plate, and an electric hydraulic cylinder fixedly connected to the top of the fixing seat. It also includes:

[0009] The output end of the electric hydraulic cylinder is fixedly connected to a hook. A limit groove is opened on the top of the bearing plate. The side wall of the hook is slidably connected to the inner wall of the limit groove. A liquid nitrogen tank body is provided on the top of the bearing frame. A slot is opened on the side wall of the liquid nitrogen tank body. The slot is engaged with the hook.

[0010] Preferably, a battery is fixedly connected to the bottom side of the support plate, casters are fixedly connected to the bottom of the support frame, a motor is fixedly connected to the top of the support frame, and a drive bevel gear is fixedly connected to the output end of the motor.

[0011] Preferably, the side wall of the driving bevel gear is meshed with a driven bevel gear, a drive wheel is fixedly connected to the central shaft of the driven bevel gear, and the top of the drive wheel is fixedly connected to the bottom of the support frame.

[0012] Preferably, a control panel is fixedly connected to the outer wall of the support plate, a trolley handle is fixedly connected to the outer wall of the support plate, and positioning wheels are fixedly connected to the inner side of the support frame.

[0013] Preferably, the side wall of the bearing plate is fixedly connected to an I-shaped guide rail, and the side wall of the I-shaped guide rail is slidably connected to two L-shaped clamps. The two L-shaped clamps are symmetrically arranged, and a double-ended threaded rod is threaded between the two L-shaped clamps. One end of the double-ended threaded rod is fixedly connected to a turntable.

[0014] Preferably, a guide slide rod is fixedly connected to the top of the L-shaped clamp, and a rubber clamping block is slidably connected to the outer wall of the guide slide rod.

[0015] Preferably, a return spring is fixedly connected to the bottom of the rubber clamping block, and the end of the return spring away from the rubber clamping block is fixedly connected to the top of the L-shaped clamping plate.

[0016] This utility model has the following advantages and effects compared with the prior art:

[0017] 1. This chemical laboratory uses an electric trolley for transporting liquid nitrogen tanks. The entire device is moved by manipulating the trolley handle, and the support frame provides support for the liquid nitrogen tank. The outer wall of the tank first contacts the positioning wheels for initial positioning and guidance. Then, the operator adjusts the electric hydraulic cylinder via the control panel to accurately insert the hook into the corresponding slot on the tank, thus limiting and traction the tank. The operator can then manually rotate the turntable, causing the double-ended threaded rod to rotate synchronously. This rotation translates into two L-shaped clamps moving synchronously in opposite directions horizontally. The L-shaped clamps move the guide slide rod, which ultimately causes the rubber clamping block to tightly adhere to the outer surface of the liquid nitrogen tank, achieving clamping and fixation. The rubber clamping block, made of rubber, has excellent friction and cushioning properties, effectively preventing the liquid nitrogen tank from slipping and falling off. This multi-directional, multi-layered stable clamping and locking of the liquid nitrogen tank significantly improves the safety and reliability of the transport process.

[0018] 2. This chemical laboratory uses an electric transport trolley for liquid nitrogen tanks. The operator presses the lifting button on the electric hydraulic cylinder via the control panel, which moves the hook upwards synchronously, thereby lifting the liquid nitrogen tank body to the set height and keeping it stably suspended at this position to ensure the safety and stability of the subsequent transportation process.

[0019] 3. This electric transport trolley for liquid nitrogen tanks in the chemical laboratory features a liquid nitrogen tank that is held in place by rubber clamps and lifted by an electric hydraulic cylinder. The tank rises synchronously with the lifting action, causing the rubber clamps to move upwards along the guide rail. When the tank experiences a relative upward movement due to vibration or external impact, a return spring, through its own elasticity, causes the rubber clamps to return to their original position, resulting in a slight downward pressure on the tank. This ensures that the tank's slot remains tightly engaged with the hook, effectively enhancing the device's self-adaptability, significantly reducing the risk of disengagement due to uneven road conditions, and improving the reliability and safety of the transport system in complex environments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the hook structure according to an embodiment of the present utility model;

[0022] Figure 3 This is a three-dimensional schematic diagram of the positioning wheel structure according to an embodiment of the present utility model;

[0023] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0024] Figure 5This is a three-dimensional schematic diagram of the rubber clamping block structure according to an embodiment of the present utility model;

[0025] Figure 6 This is a three-dimensional schematic diagram of the load-bearing frame structure according to an embodiment of the present utility model.

[0026] Figure label:

[0027] 101. Load-bearing frame;

[0028] 102. Support plate;

[0029] 103. Fixture;

[0030] 104. Electric hydraulic cylinder;

[0031] 105. Hook;

[0032] 15. Limiting groove;

[0033] 106. Liquid nitrogen tank body;

[0034] 107. Card slot;

[0035] 201. Casters;

[0036] 21. Storage battery;

[0037] 202. Electric motor;

[0038] 203. Driving bevel gear;

[0039] 204. Driven bevel gear;

[0040] 205. Drive wheel;

[0041] 206. Control Panel;

[0042] 207. Cart handle;

[0043] 208. Positioning wheel;

[0044] 301. I-shaped guide rail;

[0045] 302, L-shaped clamp;

[0046] 303. Double-ended threaded rod;

[0047] 304, turntable;

[0048] 305. Guide slide bar;

[0049] 306. Rubber clamping block;

[0050] 307. Return spring. Detailed Implementation

[0051] To enable those skilled in the art to better understand this utility model, the present utility model will now be further described in conjunction with specific embodiments.

[0052] Example 1:

[0053] like Figures 1-6 As shown, this utility model provides an electric transport trolley for liquid nitrogen tanks in chemical laboratories, including a support frame 101, a support plate 102 fixedly connected to the top of the support frame 101, a fixing seat 103 fixedly connected to the outer wall of the support plate 102, and an electric hydraulic cylinder 104 fixedly connected to the top of the fixing seat 103. The invention is characterized by further comprising:

[0054] The output end of the electric hydraulic cylinder 104 is fixedly connected to a hook 105. A limit groove 15 is opened on the top of the bearing plate 102. The side wall of the hook 105 is slidably connected to the inner wall of the limit groove 15. A liquid nitrogen tank body 106 is provided on the top of the bearing frame 101. A slot 107 is opened on the side wall of the liquid nitrogen tank body 106. The slot 107 is engaged with the hook 105.

[0055] A battery 21 is fixedly connected to the bottom side of the support plate 102, a caster wheel 201 is fixedly connected to the bottom of the support frame 101, a motor 202 is fixedly connected to the top of the support frame 101, and a drive bevel gear 203 is fixedly connected to the output end of the motor 202.

[0056] The side wall of the driving bevel gear 203 is meshed with a driven bevel gear 204, and a drive wheel 205 is fixedly connected to the central shaft of the driven bevel gear 204. The top of the drive wheel 205 is fixedly connected to the bottom of the support frame 101.

[0057] A control panel 206 is fixedly connected to the outer wall of the support plate 102, a trolley handle 207 is fixedly connected to the outer wall of the support plate 102, and a positioning wheel 208 is fixedly connected to the inner side of the support frame 101.

[0058] The side wall of the bearing plate 102 is fixedly connected to an I-shaped guide rail 301. The side wall of the I-shaped guide rail 301 is slidably connected to two L-shaped clamps 302. The two L-shaped clamps 302 are symmetrically arranged. A double-headed threaded rod 303 is threadedly connected between the two L-shaped clamps 302. One end of the double-headed threaded rod 303 is fixedly connected to a turntable 304.

[0059] The top of the L-shaped clamp 302 is fixedly connected to a guide slide rod 305, and a rubber clamping block 306 is slidably connected to the outer wall of the guide slide rod 305.

[0060] A return spring 307 is fixedly connected to the bottom of the rubber clamping block 306, and the end of the return spring 307 away from the rubber clamping block 306 is fixedly connected to the top of the L-shaped clamping plate 302.

[0061] Working principle: During operation, the operator moves the entire device by manipulating the trolley handle 207 and supports the liquid nitrogen tank body 106 using the support frame 101. The outer wall of the liquid nitrogen tank body 106 first contacts the positioning wheel 208 to achieve initial positioning and guidance. Subsequently, the operator adjusts the electric hydraulic cylinder 104 through the control panel 206 so that the hook 105 is accurately inserted into the corresponding slot 107 of the liquid nitrogen tank body 106, thereby achieving the limiting and traction connection of the liquid nitrogen tank body 106.

[0062] The operator can then manually rotate the turntable 304, which in turn drives the double-threaded rod 303 to rotate synchronously. The rotational motion of the double-threaded rod 303 is converted into the synchronous opposite movement of two L-shaped clamps 302 in the horizontal direction. The L-shaped clamps 302 drive the guide slide rod 305 to move. Finally, the guide slide rod 305 drives the rubber clamping block 306 to tightly fit against the outer surface of the liquid nitrogen tank body 106, achieving clamping and fixing. The rubber clamping block 306 is made of rubber and has good friction performance and cushioning effect, which can effectively prevent the liquid nitrogen tank from sliding off. It achieves multi-directional and multi-level stable clamping and locking of the liquid nitrogen tank body 106, which significantly improves the safety and reliability of the handling process.

[0063] After clamping and securing the liquid nitrogen tank body 106, the operator presses the lifting button of the electric hydraulic cylinder 104 via the control panel 206, causing the hook 105 to move upward synchronously, thereby lifting the liquid nitrogen tank body 106 to the set height and maintaining a stable suspension at this position to ensure the safety and stability of the subsequent handling process. Subsequently, the operator starts the motor 202, which drives the driving bevel gear 203 to rotate and meshes with the driven bevel gear 204 to achieve power transmission. The driven bevel gear 204 transmits power to the drive wheel 205, pushing the entire device along with the liquid nitrogen tank body 106 to move synchronously to the target position. After the liquid nitrogen tank body 106 is transported to the designated location, the operator presses the lowering button of the electric hydraulic cylinder 104 via the control panel 206 again, causing the hook 105 and the liquid nitrogen tank body 106 to fall smoothly until they touch the ground. At this time, the operator manually releases the rubber clamping block 306 from the outer wall of the liquid nitrogen tank and pulls the entire transport trolley horizontally away from the liquid nitrogen tank body 106, so that the hook 105 disengages from the slot 107 at the bottom of the liquid nitrogen tank body 106, thus completing the unloading and transport process of the liquid nitrogen tank body 106.

[0064] During the process of the liquid nitrogen tank body 106 being clamped by the rubber clamping block 306 and lifted by the electric hydraulic cylinder 104, the liquid nitrogen tank body 106 rises synchronously with the lifting action, and drives the rubber clamping block 306 to move upward along the guide slide bar 305. When the liquid nitrogen tank body 106 tends to move upward due to vibration or external impact, the return spring 307 causes the rubber clamping block 306 to return downward through its own elastic force, thereby causing the liquid nitrogen tank body 106 to be pressed down slightly, so that its slot 107 always maintains a tight engagement with the hook 105, which effectively enhances the self-adaptability of the device, significantly reduces the risk of disengagement caused by uneven road conditions, and improves the operational reliability and safety of the handling system in complex environments.

[0065] The above are merely preferred embodiments of the present utility model and do not limit the patent scope of the present utility model. All equivalent changes and modifications made within the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An electric transport trolley for liquid nitrogen tanks in a chemical laboratory, comprising a support frame (101), a support plate (102) fixedly connected to the top of the support frame (101), a fixing seat (103) fixedly connected to the outer wall of the support plate (102), and an electric hydraulic cylinder (104) fixedly connected to the top of the fixing seat (103), characterized in that, Also includes: The output end of the electric hydraulic cylinder (104) is fixedly connected to a hook (105). A limit groove (15) is opened on the top of the bearing plate (102). The side wall of the hook (105) is slidably connected to the inner wall of the limit groove (15). A liquid nitrogen tank body (106) is provided on the top of the bearing frame (101). A slot (107) is opened on the side wall of the liquid nitrogen tank body (106). The slot (107) is engaged with the hook (105).

2. The electric transport trolley for liquid nitrogen tanks in chemical laboratories according to claim 1, characterized in that: A battery (21) is fixedly connected to the bottom side of the support plate (102), a caster wheel (201) is fixedly connected to the bottom of the support frame (101), a motor (202) is fixedly connected to the top of the support frame (101), and an active bevel gear (203) is fixedly connected to the output end of the motor (202).

3. The electric transport trolley for liquid nitrogen tanks in chemical laboratories according to claim 2, characterized in that: The side wall of the driving bevel gear (203) is meshed with a driven bevel gear (204), and a drive wheel (205) is fixedly connected to the central shaft of the driven bevel gear (204). The top of the drive wheel (205) is fixedly connected to the bottom of the support frame (101).

4. The electric transport trolley for liquid nitrogen tanks in chemical laboratories according to claim 1, characterized in that: A control panel (206) is fixedly connected to the outer wall of the support plate (102), a trolley handle (207) is fixedly connected to the outer wall of the support plate (102), and a positioning wheel (208) is fixedly connected to the inner side of the support frame (101).

5. The electric transport trolley for liquid nitrogen tanks in chemical laboratories according to claim 1, characterized in that: The side wall of the bearing plate (102) is fixedly connected to an I-shaped guide rail (301), and the side wall of the I-shaped guide rail (301) is slidably connected to two L-shaped clamps (302). The two L-shaped clamps (302) are symmetrically arranged, and a double-headed threaded rod (303) is threaded between the two L-shaped clamps (302). One end of the double-headed threaded rod (303) is fixedly connected to a turntable (304).

6. The electric transport trolley for liquid nitrogen tanks in chemical laboratories according to claim 5, characterized in that: The top of the L-shaped clamp (302) is fixedly connected to a guide slide rod (305), and a rubber clamping block (306) is slidably connected to the outer wall of the guide slide rod (305).

7. The electric transport trolley for liquid nitrogen tanks in chemical laboratories according to claim 6, characterized in that: A return spring (307) is fixedly connected to the bottom of the rubber clamping block (306), and the end of the return spring (307) away from the rubber clamping block (306) is fixedly connected to the top of the L-shaped clamping plate (302).

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