Liquid-phase turnover barrel with weighing function and method for weighing materials in liquid-phase turnover barrel
By installing inner and outer cylinders, spring-driven sensors, and air pressure sensors inside the liquid phase turnover tank, the problem of the turnover tank being unable to accurately display the material storage volume is solved, enabling accurate weighing under any air pressure conditions and conveniently controlling the material storage volume.
Patent Information
- Application Number
- CN202511949421.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-01-27
AI Technical Summary
Existing turnover bins cannot accurately provide material storage volume. Users need to shake or tap them to judge, which poses safety hazards and has low accuracy. In addition, conventional weighing methods are inconvenient.
Design a liquid phase turnover tank with weighing function, which is equipped with inner and outer cylinders and spring-driven weighing sensors. Combined with a pressure sensor, the weight of the material is displayed on the display panel. The inner cylinder is equipped with a drain pipe and an air pipe to control the air pressure and the addition and discharge of materials.
It enables accurate display of the weight of the material in the inner cylinder under any air pressure conditions, making it easy to grasp the material storage volume and avoiding the safety hazards and inaccuracies caused by shaking or knocking.
Smart Images
Figure CN121404684A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of turnover container technology, specifically relating to a liquid phase turnover container with weighing function and a method for weighing the materials inside the liquid phase turnover container. Background Technology
[0002] Reusable storage containers are widely used across various industries. In the lithium battery and pharmaceutical industries, where materials have extremely high requirements for storage environment, sealed stainless steel containers are typically used for storage and turnover. Because stainless steel containers are completely sealed and heavy, users find it difficult to accurately determine the amount of material inside. Users often try shaking or tapping the container to judge the amount, but these methods pose safety hazards and have very low accuracy. A common method is to place the containers on a weighing device, but this obviously makes the containers inconvenient to use. Summary of the Invention
[0003] The technical problem to be solved by this invention is to provide a liquid phase turnover tank with weighing function, thereby solving the technical problem that conventional turnover tanks cannot provide users with accurate material storage quantities.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a liquid phase turnover tank with weighing function, including an outer cylinder and a top cover. An inner cylinder is coaxially arranged inside the outer cylinder. A spring is arranged between the outer bottom surface of the inner cylinder and the inner bottom surface of the outer cylinder. The top cover includes an outer cover that is detachably connected to the outer cylinder and an inner cover that is sealed and pressed against the top surface of the inner cylinder. The inner cover is axially movable and snapped onto the inner end face of the outer cover. At least three weighing sensors are arranged between the inner cover and the outer cover, which are circumferentially distributed with the central axis of the inner cover as the center. A display panel is provided on the outer end face of the outer cover. A wire hole is opened on the inner end face of the outer cover. The wires of each weighing sensor are connected to the display panel through the wire hole. The elastic force of the spring drives the inner cylinder to press the inner cover upward, so that the inner cover presses the weighing sensors. The weighing sensors transmit the detected pressure to the display panel. The inner cover is connected to a drain pipe and a gas pipe, both of which are sealed to the inner cover. One end of the drain pipe and the gas pipe extends through the outer cover and out of the outer cover, while the other end is inserted into the inner cylinder. The drain pipe is inserted into the bottom of the inner cylinder, and the gas pipe is inserted into the upper part of the inner cylinder. The lower end of the gas pipe is located above the liquid surface of the liquid material in the inner cylinder. A drain valve is connected to the drain pipe located outside the outer cover, and a gas valve and a pressure sensor are connected to the gas pipe located outside the outer cover. The pressure sensor is used to detect the internal pressure of the inner cylinder and is connected to the display panel to send the detection results to the display panel.
[0005] As a preferred embodiment, the drain pipe and the air pipe have semicircular cross-sections with equal radii, and their plane sides are connected to each other and share a common sidewall, and the drain pipe and the air pipe are integrally formed.
[0006] As a preferred embodiment, a regular polygonal insertion groove is provided on the inner bottom surface of the outer cover, the top of the inner cover is inserted into the insertion groove and is adapted to the insertion groove, and an annular anti-detachment groove is provided on the outer circumference surface of the inner cover. A retaining ring is provided at the opening of the insertion groove to engage with the anti-detachment groove. The retaining ring is fixedly connected to the outer cover to prevent the inner cover from falling off. The width of the anti-detachment groove is greater than the thickness of the retaining ring, so that the inner cover can move axially relative to the outer cover.
[0007] As a preferred embodiment, there is a gap between the inner cylinder and the outer cylinder, the annular surface at the top of the inner cylinder is a conical inclined surface, the lower end of the inner cover is provided with a frustum portion that matches the inclined surface at the top of the inner cylinder, and a sealing ring is provided at the position corresponding to the annular inclined surface at the top of the inner cylinder.
[0008] As a preferred embodiment, there is a gap between the outer wall of the drain pipe and the air pipe and the outer cover. A dust cover is fitted over the drain pipe and the air pipe. The dust cover is threaded to the top of the outer cover. The diameter of the central hole of the dust cover is larger than the outer diameter of the circular outer wall formed by the drain pipe and the air pipe. A loop of fleece is attached to the inner wall of the dust cover. The fleece of the loop of fleece is in contact with the drain pipe and the air pipe.
[0009] As a preferred embodiment, the display panel includes a controller, a power supply, and a display. Each weighing sensor and pressure sensor is electrically connected to the controller and sends the detection results to the controller. The controller calculates the weight of the material inside the inner cylinder based on the detection results and displays it on the display.
[0010] As a preferred embodiment, the outer cover is tightly connected to the annular surface at the top of the outer cylinder 1 by a plurality of screws.
[0011] As a preferred embodiment, the outer cover is threadedly connected to the outer cylinder, the inner wall of the top of the outer cylinder has a stepped hole, the bottom of the outer cover is inserted into the stepped hole and threadedly connected to the side wall of the stepped hole, and the top of the outer cover abuts against the annular end face of the top of the outer cylinder.
[0012] The technical problem to be further solved by the present invention is to provide a method for weighing materials inside a liquid phase turnover tank, thereby solving the technical problem that conventional turnover tanks cannot conveniently provide users with accurate material storage quantities.
[0013] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for weighing materials inside a liquid phase turnover tank, comprising the following specific steps: S1. The above-mentioned liquid phase turnover tank with weighing function is used to store materials. Before storage, the top cover is closed on the outer cylinder opening and the outer cover is tightly pressed against the outer cylinder to keep the air pressure inside the inner cylinder consistent with the outside. Each weighing sensor detects the pressure value and sends it to the display panel. The display panel sums the detection results of each weighing sensor to obtain the corrected pressure value m. S2. Configure the display panel so that the displayed material weight value M = -[m' - m - (P)] 内-P 外 )*2S], where m' is the sum of the pressure values actually detected by each weighing sensor; P 内 It refers to the internal air pressure of the inner cylinder, P. 外 is the external air pressure of the outer cylinder, and S is the internal cross-sectional area of the inner cylinder; S3. Inject inert protective gas into the inner cylinder through the air tube, open the drain valve to purge the air from the inside of the inner cylinder, and then close the drain valve and the air valve. S4. Connect the drain pipe to the filling device, open the drain valve, and fill the inner cylinder with liquid material through the drain pipe. Slightly open the air valve to keep the air pressure inside the inner cylinder positive. S5. Observe the value M displayed on the display panel, which is the weight of the injected material. After the weight of the injected material reaches the target value, close the drain valve and the air valve. S6. When discharging liquid material, connect the inert protective gas source to the air pipe, open the air valve and the drain valve, and the inert protective gas source injects inert protective gas into the inner cylinder 3 through the air pipe, which increases the air pressure inside the inner cylinder and squeezes the liquid material out through the drain pipe. Observe the value M displayed on the display panel, which is the weight of the remaining material.
[0014] The beneficial effects of this invention are as follows: This invention uses the elastic force of a spring on the inner cylinder to act on a weighing sensor, and uses the pressure value detected by the weighing sensor combined with the air pressure value detected by the air pressure sensor to calculate the actual weight of the liquid material, and directly provides feedback to the user through the display panel. Whether it is when adding material or using material, regardless of the air pressure inside the inner cylinder, the weight of the material stored inside the inner cylinder can be accurately displayed, allowing the user to conveniently grasp the material storage in the barrel at any time. Attached Figure Description
[0015] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of the liquid phase transfer tank described in Example 1; Figure 2 This is an actual cross-sectional view of the drain pipe and gas pipe described in Example 1; Figure 3 This is a bottom view of the outer cover described in Embodiment 1; Figure 4 yes Figure 1 Enlarged view of part A in the image; Figure 5 This is a schematic diagram of the display panel structure described in Embodiment 1; Figure 6 This is a schematic diagram of the structure of the liquid phase transfer tank described in Example 2; Figures 1-6Components: 1. Outer cylinder; 2. Top cover; 201. Outer cover; 202. Inner cover; 3. Inner cylinder; 4. Spring; 5. Weighing sensor; 6. Mounting slot; 7. Display panel; 701. Controller; 702. Power supply; 703. Display; 8. Cable guide hole; 9. Drain pipe; 10. Air pipe; 11. Drain valve; 12. Air valve; 13. Air pressure sensor; 14. Insertion slot; 15. Anti-detachment slot; 16. Snap ring; 17. Conical part; 18. Sealing ring; 19. Dust cover; 20. Loop; 21. Screw; 22. Stepped hole; 23. Limiting groove; 24. Turntable; 25. Limiting ring; 26. Upper groove; 27. Lower groove; 28. Ball bearing. Detailed Implementation
[0016] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1
[0017] like Figure 1 The liquid phase turnover tank with weighing function shown includes an outer cylinder 1 and a top cover 2. An inner cylinder 3 is coaxially arranged inside the outer cylinder 1. A spring 4 is arranged between the outer bottom surface of the inner cylinder 3 and the inner bottom surface of the outer cylinder 1. The top cover 2 includes an outer cover 201 detachably connected to the outer cylinder 1 and an inner cover 202 sealed and pressed against the top surface of the inner cylinder 3. The inner cover 202 is axially movable and snapped onto the inner end face of the outer cover 201. At least three weighing sensors 5 are arranged between the inner cover 202 and the outer cover 201, circumferentially evenly distributed around the central axis of the inner cover 202. A mounting groove 6 is opened on the outer end face of the outer cover 201, and a display panel 7 is embedded in the mounting groove 6. A wire hole 8 communicating with the mounting groove 6 is opened on the inner end face of the outer cover 201. The wires of each weighing sensor 5 ( Figure 1 and Figure 6 The yellow line in the middle is connected to the display panel 7 through the wire hole 8. The elastic force of the spring 4 drives the inner cylinder 3 to press the inner cover 202 upward, so that the inner cover 202 presses each weighing sensor 5. The weighing sensor 5 transmits the detected pressure to the display panel 7. A drain pipe 9 and an air pipe 10 are connected to the inner cover 202. Both the drain pipe 9 and the air pipe 10 are sealed to the inner cover 202. One end of the drain pipe 9 and the air pipe 10 passes through the outer cover 201 and extends to the outside of the outer cover 201, while the other end is inserted into the inner cylinder 3. The drain pipe 9 is inserted into the bottom of the inner cylinder 3, and the air pipe 10 is inserted into the upper part of the inner cylinder 3. The lower end of the air pipe 10 is located above the liquid surface of the liquid phase material in the inner cylinder 3. A drain valve 11 is connected to the drain pipe 9 located outside the outer cover 201, and an air valve 12 and a pressure sensor 13 are connected to the air pipe 10 located outside the outer cover 201. The pressure sensor 13 is used to detect the air pressure inside the inner cylinder 3. The pressure sensor 13 is connected to the display panel 7 and sends the detection result to the display panel 7.
[0018] like Figure 2The diagram shows the cross-sectional structure of the drain pipe 9 and the air pipe 10. The drain pipe 9 and the air pipe 10 have semi-circular cross-sections of equal radius. Their planar sides are joined together and share a common sidewall. The drain pipe 9 and the air pipe 10 are integrally formed. This reduces the weld length of the drain pipe 9 and the air pipe 10 on the inner cover 202, thereby reducing the welding workload and the risk of weld leakage.
[0019] like Figure 1 and Figure 3 As shown, a regular polygonal insertion groove 14 is provided on the inner bottom surface of the outer cover 201. The top of the inner cover 202 is inserted into the insertion groove 14 and is adapted to the insertion groove 14. An annular anti-detachment groove 15 is provided on the outer circumference surface of the inner cover 202. A retaining ring 16 is provided at the opening of the insertion groove 14 to engage with the anti-detachment groove 15. The retaining ring 16 is fixedly connected to the outer cover 201 to prevent the inner cover 202 from falling off. The width of the anti-detachment groove 15 is greater than the thickness of the retaining ring 16, so that the inner cover 202 can move axially relative to the outer cover 201.
[0020] There is a gap between the inner cylinder 3 and the outer cylinder 1. The annular surface at the top of the inner cylinder 3 is a conical inclined surface. The lower end of the inner cover 202 is provided with a frustum portion 17 that is adapted to the inclined surface at the top of the inner cylinder 3. A sealing ring 18 is provided at the position corresponding to the annular inclined surface at the top of the inner cylinder 3.
[0021] The gap between the inner cylinder 3 and the outer cylinder 1 is to eliminate the friction between the inner wall of the outer cylinder 1 and the inner cylinder 3, thereby improving the detection accuracy. At the same time, it can reduce the thermal conductivity of the inner cylinder 3 and the outer cylinder 1, achieving the function of heat insulation.
[0022] like Figure 4 As shown, there is a gap between the outer wall of the drain pipe 9 and the air pipe 10 and the outer cover 201. A dust cover 19 is fitted over the drain pipe 9 and the air pipe 10. The dust cover 19 is threaded to the top of the outer cover 201. The diameter of the central hole of the dust cover 19 is larger than the outer diameter of the circular outer wall formed by the drain pipe 9 and the air pipe 10. A loop of fleece 20 is attached to the inner wall of the dust cover 19. The fleece of the loop of fleece 20 contacts the drain pipe 9 and the air pipe 10 to prevent dust from entering between the outer cover 201 and the inner cover 202 and affecting the detection accuracy of the weighing sensor 5.
[0023] like Figure 5 As shown, the display panel 7 includes a controller 701, a power supply 702, and a display 703. Each weighing sensor 5 and air pressure sensor 13 is electrically connected to the controller 701 and sends the detection results to the controller 701. The controller 701 calculates the weight of the material in the inner cylinder based on the detection results and displays it on the display 703. The display 703 is preferably a touch screen display, which allows for interactive operation to set the parameters of the program run by the controller.
[0024] like Figure 1As shown, in this embodiment, the outer cover 201 is tightly connected to the annular surface at the top of the outer cylinder 1 by a plurality of screws 21.
[0025] The working process of this embodiment is described in Embodiment 3. Example 2
[0026] like Figure 6 As shown, this embodiment is based on embodiment 1. Compared with embodiment 1, the connection method between the outer cover 201 and the outer cylinder 1 is different. In this embodiment, the outer cover 201 is threadedly connected to the outer cylinder 1. The inner wall of the top of the outer cylinder 1 has a stepped hole 22. The bottom of the outer cover 201 is inserted into the stepped hole 22 and threadedly connected to the side wall of the stepped hole 22. The top of the outer cover 201 abuts against the annular end face of the top of the outer cylinder 1. A circular limiting groove 23 is provided at the bottom of the outer cylinder 1. The limiting groove 23 is located directly below the inner cylinder 3 and is coaxial with the inner cylinder 3. A [missing information - likely a device or material] is provided in the limiting groove 23. A turntable 24 is connected around its perimeter by an upwardly extending limiting ring 25. The lower end of a spring 4 abuts against the turntable 24 and is located within the limiting ring 25. A circular upper groove 26 is provided on the bottom surface of the turntable 24, and a lower groove 27 is provided on the bottom surface of the limiting groove 23, which is directly opposite to the upper groove 26. The cross-sections of the upper groove 26 and the lower groove 27 are both arc-shaped. Multiple balls 28 are provided between the bottom surfaces of the turntable 24 and the limiting groove 23. Each ball 28 is located within the upper groove 26 and the lower groove 27. The turntable 24 is rotatably connected to the limiting groove 23 through the balls 28.
[0027] The technical solution adopted in this embodiment uses a turntable 24 to enable the inner cylinder 3 to rotate, thereby eliminating the elastic instability caused by the torsion of the spring 4.
[0028] The technical solution described in this embodiment provides a solution for weighing and detecting the internal material storage volume of screw-cap type turnover barrels.
[0029] The working process of this embodiment is described in Embodiment 3. Example 3
[0030] Combination Figures 1-6 A method for weighing materials inside a liquid-phase transfer tank, comprising the following specific steps: S1. The liquid phase turnover tank with weighing function described in Example 1 or Example 2 is used to store materials. Before storage, the top cover 2 is closed on the opening of the outer cylinder 1 and the outer cover 201 is tightly pressed against the outer cylinder 1 to keep the air pressure inside the inner cylinder 3 consistent with the outside. Each weighing sensor 5 detects the pressure value and sends it to the display panel 7. The display panel 7 sums the detection results of each weighing sensor 5 to obtain the corrected pressure value m.
[0031] S2. Configure the display panel 7 so that the displayed material weight value M = -[m' - m - (P)] 内 -P 外)*2S], where m' is the sum of the pressure values actually detected by each weighing sensor 5; P 内 It is the internal air pressure of inner cylinder 3, P 外 S is the external air pressure of the outer cylinder 1, and S is the internal cross-sectional area of the inner cylinder 3.
[0032] S3. Inject inert protective gas into the inner cylinder 3 through the air pipe 10, open the drain valve 11, and after the air inside the inner cylinder 3 is purged, close the drain valve 11 and the air valve 12.
[0033] S4. Connect the drain pipe 9 to the filling device, open the drain valve 11, and fill the inner cylinder 3 with liquid material through the drain pipe 9. Slightly open the air valve 12 to keep the air pressure inside the inner cylinder 3 positive.
[0034] S5. Observe the value M displayed on the display panel 7, which is the weight of the injected material. After the weight of the injected material reaches the target value, close the drain valve 11 and the air valve 12.
[0035] S6. When discharging liquid material, the air pipe 10 is connected to the inert protective gas source, the air valve 12 and the drain valve 11 are opened, and the inert protective gas source injects inert protective gas into the inner cylinder 3 through the air pipe 10, which increases the air pressure inside the inner cylinder 3 and squeezes the liquid material out through the drain pipe 9. Observe the value M displayed on the display panel 7, which is the weight of the remaining material.
[0036] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.
Claims
1. A liquid phase transfer tank with weighing function, comprising an outer cylinder (1) and a top cover (2), characterized in that, An inner cylinder (3) is coaxially arranged inside the outer cylinder (1). A spring (4) is provided between the outer bottom surface of the inner cylinder (3) and the inner bottom surface of the outer cylinder (1). The top cover (2) includes an outer cover (201) detachably connected to the outer cylinder (1) and an inner cover (202) sealed and pressed against the top surface of the inner cylinder (3). The inner cover (202) is axially movable and snapped onto the inner end face of the outer cover (201). At least three springs are provided between the inner cover (202) and the outer cover (201), with the central axis of the inner cover (202) as the reference point. Weighing sensors (5) are evenly distributed around the center. A display panel (7) is provided on the outer end face of the outer cover (201). A wire hole (8) is opened on the inner end face of the outer cover (201). The wires of each weighing sensor (5) are connected to the display panel (7) through the wire hole (8). The elastic force of the spring (4) drives the inner cylinder (3) to press the inner cover (202) upward, so that the inner cover (202) presses each weighing sensor (5). The weighing sensor (5) transmits the detected pressure to the display panel (7). A drain pipe (9) and an air pipe (10) are connected to the inner cover (202). Both the drain pipe (9) and the air pipe (10) are sealed to the inner cover (202). One end of the drain pipe (9) and the air pipe (10) passes through the outer cover (201) and extends to the outside of the outer cover (201), while the other end is inserted into the inner cylinder (3). The drain pipe (9) is inserted into the bottom of the inner cylinder (3), and the air pipe (10) is inserted into the upper part of the inner cylinder (3). The lower end is located above the liquid surface of the liquid phase material in the inner cylinder (3). A drain valve (11) is connected to the drain pipe (9) located outside the outer cover (201). An air valve (12) and a pressure sensor (13) are connected to the air pipe (10) located outside the outer cover (201). The pressure sensor (13) is used to detect the air pressure inside the inner cylinder (3). The pressure sensor (13) is connected to the display panel (7) and sends the detection result to the display panel (7).
2. The liquid phase transfer tank with weighing function according to claim 1, characterized in that, The cross-sections of the drain pipe (9) and the air pipe (10) are semicircles with equal radii. The drain pipe (9) and the air pipe (10) are connected on one side of their planes and share a common sidewall. The drain pipe (9) and the air pipe (10) are integrally formed.
3. The liquid phase transfer tank with weighing function according to claim 1, characterized in that, The outer cover (201) has a regular polygonal insertion groove (14) on its inner bottom surface. The top of the inner cover (202) is inserted into the insertion groove (14) and is adapted to the insertion groove (14). The outer circumference of the inner cover (202) has an annular anti-detachment groove (15). The groove opening of the insertion groove (14) is provided with a retaining ring (16) that can be inserted into the anti-detachment groove (15). The retaining ring (16) is fixedly connected to the outer cover (201) to prevent the inner cover (202) from falling off. The width of the anti-detachment groove (15) is greater than the thickness of the retaining ring (16) so that the inner cover (202) can move axially relative to the outer cover (201).
4. The liquid phase transfer tank with weighing function according to claim 1, characterized in that, There is a gap between the inner cylinder (3) and the outer cylinder (1). The annular surface at the top of the inner cylinder (3) is a cone-shaped inclined surface. The lower end of the inner cover (202) is provided with a frustum (17) that is adapted to the inclined surface at the top of the inner cylinder (3). A sealing ring (18) is provided at the position corresponding to the annular inclined surface at the top of the inner cylinder (3) of the frustum (17).
5. The liquid phase transfer tank with weighing function according to claim 2, characterized in that, There is a gap between the outer wall of the drain pipe (9) and the air pipe (10) and the outer cover (201). A dust cover (19) is fitted on the outside of the drain pipe (9) and the air pipe (10). The dust cover (19) is threaded to the top of the outer cover (201). The diameter of the central hole of the dust cover (19) is larger than the outer diameter of the circular outer wall formed by the drain pipe (9) and the air pipe (10). A loop of fleece (20) is attached to the inner wall of the dust cover (19). The fleece of the loop of fleece (20) is in contact with the drain pipe (9) and the air pipe (10).
6. The liquid phase transfer tank with weighing function according to claim 1, characterized in that, The display panel (7) includes a controller (701), a power supply (702), and a display (703). Each weighing sensor (5) and air pressure sensor (13) is electrically connected to the controller (701) and sends the detection results to the controller (701). The controller (701) calculates the weight of the material in the inner cylinder based on the detection results and displays it on the display (703).
7. The liquid phase transfer tank with weighing function according to claim 1, characterized in that, The outer cover (201) is tightly connected to the annular surface at the top of the outer cylinder 1 by a plurality of screws (21).
8. The liquid phase transfer tank with weighing function according to claim 1, characterized in that, The outer cover (201) is threadedly connected to the outer cylinder (1). The inner wall of the top of the outer cylinder (1) has a stepped hole (22). The bottom of the outer cover (201) is inserted into the stepped hole (22) and threadedly connected to the side wall of the stepped hole (22). The top of the outer cover (201) abuts against the annular end face of the top of the outer cylinder (1). The bottom of the outer cylinder (1) is provided with a circular limiting groove (23). The limiting groove (23) is located directly below the inner cylinder (3) and is coaxial with the inner cylinder (3). A turntable (24) is provided in the limiting groove (23). The turntable (24) is connected with upwardly extending limiting rings (25) around its perimeter. The lower end of the spring (4) abuts against the turntable (24) and is located inside the limiting ring (25). A circular upper groove (26) is provided on the bottom surface of the turntable (24), and a lower groove (27) is provided on the bottom surface of the limiting groove (23) opposite to the upper groove (26). The cross sections of the upper groove (26) and the lower groove (27) are both arc-shaped. Multiple balls (28) are provided between the bottom surface of the turntable (24) and the limiting groove (23). Each ball (28) is located in the upper groove (26) and the lower groove (27). The turntable (24) is rotatably connected to the limiting groove (23) through the balls (28).
9. A method for weighing materials inside a liquid-phase transfer tank, characterized in that, The specific steps include the following: S1. The liquid phase turnover tank with weighing function described in any one of claims 1 to 8 is used to store materials. Before storage, the top cover (2) is closed on the mouth of the outer cylinder (1) and the outer cover (201) is tightly pressed against the outer cylinder (1) to keep the air pressure inside the inner cylinder (3) consistent with the outside. Each weighing sensor (5) detects the pressure value and sends it to the display panel (7). The display panel (7) sums the detection results of each weighing sensor (5) to obtain the corrected pressure value m. S2. Set the display panel (7) so that the displayed material weight value M = -[m' - m - (P 内 -P 外 )*2S],where m' is the sum of the pressure values actually detected by each weighing sensor (5); P 内 It is the internal air pressure of the inner cylinder (3), P 外 S is the external air pressure of the outer cylinder (1), and S is the internal cross-sectional area of the inner cylinder (3). S3. Inject inert protective gas into the inner cylinder (3) through the air pipe (10), open the drain valve (11), and after the air inside the inner cylinder (3) is purged, close the drain valve (11) and the air valve (12). S4. Connect the drain pipe (9) to the filling device, open the drain valve (11), and fill the inner cylinder (3) with liquid phase material through the drain pipe (9). Slightly open the gas valve (12) to keep the gas pressure inside the inner cylinder (3) positive. S5. Observe the value M displayed on the display panel (7), which is the weight of the injected material. After the weight of the injected material reaches the target value, close the drain valve (11) and the air valve (12). S6. When discharging liquid material, the air pipe (10) is connected to the inert protection gas source, and the air valve (12) and the drain valve (11) are opened. The inert protection gas source injects inert protection gas into the inner cylinder 3 through the air pipe (10), which increases the air pressure inside the inner cylinder (3) and squeezes the liquid material out of the drain pipe (9). Observe the value M displayed on the display panel (7), which is the weight of the remaining material.