A laboratory liquid dosing and filling device

Abstract

The utility model provides a kind of laboratory liquid quantitative measurement and canning device, comprising: intercommunication quantitative component and switch component;Wherein, the quantitative component, comprising, hollow cylindrical can body (1), the can body (1) bottom is connected with the quantitative component top;Variable capacity adjusting rod (2) is equipped in the can body (1), for adjusting the hollow cavity volume of the can body (1);The switch component, comprising, shell (8), the shell (8) top is connected with the can body (1) bottom;Switch device is equipped in the shell (8), the hollow cavity of the switch device top is communicated with the can body (1), bottom is worn out the shell (8) bottom, for discharging the liquid inside the hollow cavity, the switch device side is worn out the lateral wall of the shell (8), for transporting liquid to the inside of the hollow cavity.

Description

Technical Field

[0001] This utility model relates to a measuring and filling device, and in particular to a laboratory liquid quantitative measuring and filling device. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In laboratory experiments involving the large-scale measurement of bottled liquids, measuring instruments such as graduated cylinders and measuring cups are typically used to measure the liquid. The scale is then visually observed to determine whether the liquid has reached the target volume before it is transferred to the experimental container.

[0004] When dealing with large sample sizes and the need for accurate liquid volume measurement, measuring instruments such as graduated cylinders are used to determine the volume by visually observing the scale. While this method is simple and easy to operate, it suffers from drawbacks such as increased random errors, poor repeatability, and low efficiency in batch processing. Furthermore, the liquid transfer gap pipe is kept open, wasting experimental liquid.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] Purpose of the invention: The technical problem to be solved by this utility model is to provide a laboratory liquid quantitative measuring and filling device to address the shortcomings of the existing technology.

[0007] To solve the above-mentioned technical problems, this utility model discloses a laboratory liquid quantitative measuring and filling device, comprising:

[0008] Interconnected metering and switching components; wherein,

[0009] The metering component includes a hollow cylindrical tank, the bottom of which is connected to the top of the metering component; the tank is provided with a variable volume adjustment rod for adjusting the volume of the hollow cavity of the tank.

[0010] The switching component includes a housing, the top of which is connected to the bottom of the tank; a switching device is provided inside the housing, the top of which communicates with the hollow cavity of the tank, and the bottom of which protrudes from the bottom of the housing for discharging liquid inside the hollow cavity; the side of the switching device protrudes from the side wall of the housing for conveying liquid into the hollow cavity.

[0011] Furthermore, a liquid level monitoring component is provided inside the hollow cavity to monitor the liquid level.

[0012] Furthermore, the liquid level monitoring component includes:

[0013] A float is installed inside the hollow cavity. A full-load sensor and an empty-load sensor are fixed at the top and bottom of the hollow cavity, respectively. The full-load sensor and the empty-load sensor are electrically connected to the full-load indicator light and the empty-load indicator light, respectively.

[0014] Furthermore, the variable capacity adjustment rod is inserted into the tank body along the axial direction of the tank body. The variable capacity adjustment rod is provided with an external thread, and the top of the tank body is provided with an internal thread. The variable capacity adjustment rod is threadedly connected to the tank body, and a locking nut is sleeved on the top of the variable capacity adjustment rod. The internal thread of the locking nut engages with the external thread.

[0015] Furthermore, the external thread is an open thread, and a vertical scale is provided on the external thread along the axial direction of the variable capacity adjustment rod to mark the height position of the variable capacity adjustment rod.

[0016] Furthermore, a piston is fixedly provided at the bottom of the variable capacity adjusting rod, and the bottom surface of the piston, the bottom of the tank and the inner sidewall together form the hollow cavity.

[0017] Furthermore, the variable capacity regulating rod has a vent hole along the axial direction, which connects the hollow cavity to the atmosphere for pressure equalization.

[0018] Furthermore, the switching device includes:

[0019] An inverted Y-shaped tee pipe is installed inside the outer shell. The tee pipe consists of a top opening, an inlet guide pipe, and a drain guide pipe. The top opening of the tee pipe passes through the top of the outer shell and the bottom of the tank, communicating with the hollow cavity of the tank. The drain guide pipe has a drain port at its bottom. The inlet guide pipe and the drain guide pipe are respectively connected to a horizontally arranged injection pipe. One end of the injection pipe extends from the side of the outer shell and has an injection port, while the other end is fixed to the inner wall of the outer shell.

[0020] The bottom end of the inlet guide tube is connected to the side wall of the injection tube, and the top end is connected to the side wall of the outlet guide tube; the upper end of the outlet guide tube is connected to the top opening of the tee pipe, and the lower end passes vertically through the middle of the injection tube. That is, the injection tube has through holes at the top and bottom corresponding to the position of the outlet guide tube, which are connected to the upper and lower parts of the outlet guide tube respectively.

[0021] The injection tube is fitted with a rotating rod, which is a hollow structure. One end is closed and extends out of the outer shell, while the other end has an opening that communicates with the inside of the injection tube.

[0022] The rotating rod sidewall has a first opening at the corresponding position at the bottom end of the liquid inlet guide tube, which connects to or closes the liquid inlet guide tube;

[0023] The rotating rod sidewall has a second rotating rod opening at the corresponding position through which the drain guide pipe passes, which connects to or closes the drain guide pipe.

[0024] The connection or closure of the first opening and the second opening of the rotating rod is selectable.

[0025] Furthermore, a handle is fixedly provided at one end of the rotating rod that extends out of the outer casing.

[0026] Furthermore, the metering component and the switching component are connected by bolts, and a first sealing ring is provided at the connection point.

[0027] Beneficial effects:

[0028] 1. The device proposed in this utility model can eliminate the random errors introduced by human observation of the scale, greatly improve the consistency of repeated quantitative liquid volume measurement, and meet the measurement needs of single or batch quantitative liquid measurement.

[0029] 2. The device proposed in this utility model is easy to operate, can be completed by a single person, and provides accurate quantification. Attached Figure Description

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0032] In the diagram, 1 is the tank body, 2 is the variable volume adjustment rod, 201 is the breather hole, 202 is the external thread, 203 is the scale, 204 is the piston, 3 is the locking nut, 4 is the float, 501 is the full load sensor, 502 is the no-load sensor, 601 is the full load indicator light, 602 is the no-load indicator light, 7 is the first sealing ring, 8 is the outer shell, 9 is the rotating rod, 901 is the handle, 902 is the first opening of the rotating rod, 903 is the second opening of the rotating rod, 10 is the injection pipe, 1001 is the injection port, 11 is the inlet guide pipe, 12 is the outlet guide pipe, 1201 is the outlet, and 13 is the second sealing ring. Detailed Implementation

[0033] The overall concept of this utility model is as follows:

[0034] 1. By adjusting the variable volume adjustment rod 2, the target volume can be accurately quantified, and the repeatability of multiple measurements is good. The thread of the variable volume adjustment rod 2 is not fully closed; the unclosed side is a flat scale 203, which facilitates clear setting of the scale and accurate marking of the volume.

[0035] 2. The scale 203 is installed on the variable volume adjustment rod 2. The target volume can be adjusted by adjusting the screw-in and screw-out length of the variable volume adjustment rod 2. The scale 203 has a large range and a small graduation value, which can meet the measurement needs of different liquid volumes and has high accuracy.

[0036] 3. The sensor is triggered by the float 4 to indicate the switch action. Two through holes are set at 90° positions on the axial tangent of the rotating rod 9. The rotating shaft is welded to the switch. The liquid filling and drainage are realized by rotating the switch.

[0037] 4. Depending on the experimental requirements for the amount of canned goods, two or more of these devices can be connected in series to improve work efficiency.

[0038] 5. The pressure of a typical liquid pipeline is sufficient to meet the measurement requirements, and no external power is needed.

[0039] The specific solution of this utility model is as follows:

[0040] A laboratory liquid quantitative measuring and filling device, such as Figure 1 As shown, it includes a metering component and a switching component that are interconnected; wherein, the metering component includes:

[0041] A hollow cylindrical tank 1 is provided, with its bottom connected to the top of a metering component. A variable volume adjustment rod 2 is installed inside the tank 1 to adjust the volume of the hollow cavity.

[0042] The variable capacity adjustment rod 2 is provided with an external thread 202, and the top opening of the tank body 1 is provided with an internal thread. The variable capacity adjustment rod 2 is threadedly connected to the tank body 1. After the height is set by rotating, the locking nut 3 is unscrewed from the top of the variable capacity adjustment rod 2 and abuts against the top of the tank body 1, thereby fixing the variable capacity adjustment rod 2. The locking nut 3 is coaxially arranged with the tank body 1.

[0043] The variable volume adjusting rod 2 also includes a piston 204 disposed at the bottom of the variable volume adjusting rod 2. The bottom of the piston 204, the bottom of the tank body 1, and the inner wall together form a hollow cavity. In use, raising or lowering the variable volume adjusting rod 2 will raise or lower the piston 204, thereby increasing or decreasing the volume of the hollow cavity.

[0044] A breather hole 201 is vertically inserted through the center axis of the variable displacement adjusting rod 2, which is used to discharge the gas in the hollow cavity when the piston moves downward, so as to balance the pressure in the hollow cavity.

[0045] The external thread 202 of the variable capacity adjustment rod 2 is an unclosed thread, and a scale 203 is vertically provided along the axis of the variable capacity adjustment rod 2 to mark the high and low positions of the variable capacity adjustment rod 2.

[0046] A liquid level monitoring component is also provided in the hollow cavity between the bottom of the variable volume regulating rod 2 and the bottom of the tank 1 to monitor the liquid level position in the hollow cavity.

[0047] Liquid level monitoring components include:

[0048] A float 4 is installed inside the hollow cavity, an empty-load sensor 502 is installed at the bottom of the tank body 1, and a full-load sensor 501 is installed at the bottom of the variable-capacity adjusting rod 2. The full-load sensor 501 and the empty-load sensor 502 are electrically connected to the full-load indicator light 601 and the empty-load indicator light 602, respectively. In use, as the liquid level rises or falls, the float 4 touches the full-load sensor 501 or the empty-load sensor 502, triggering the full-load indicator light 601 or the empty-load indicator light 602 to light up.

[0049] The switch component includes a housing 8, the top of which is bolted to the bottom of the tank body 1. A first sealing ring 7 is provided at the connection to prevent leakage.

[0050] Both the top of the outer shell 8 and the bottom of the tank 1 have openings of the same size.

[0051] The shell 8 has an inverted Y-shaped tee pipe installed vertically inside. The opening at the top of the tee pipe is the same size as the opening at the top of the shell 8 and the bottom of the tank 1. The inside of the tee pipe is connected to the hollow cavity of the tank 1.

[0052] The two channels of the three-way pipe are: inlet guide pipe 11 and outlet guide pipe 12. The outlet guide pipe 12 is provided with an outlet 1201 at the bottom for discharging substances from the hollow cavity.

[0053] The inlet guide pipe 11 and the outlet guide pipe 12 are respectively connected to the horizontally arranged injection pipe 10. One end of the inlet guide pipe 11 is connected to the injection pipe 10, and the other end is connected to the outlet guide pipe 12. The upper end of the outlet guide pipe 12 is the top opening of a three-way pipe, and the lower end is vertically inserted through the middle of the injection pipe 10. That is, the injection pipe 10 has through holes at the upper and lower positions, which are respectively connected to the upper and lower parts of the outlet guide pipe 12.

[0054] One end of the injection tube 10 has an injection port 1001, and the other end is fixed on the inner wall of the outer casing 8.

[0055] A rotating rod 9 is fitted inside the injection tube 10. One end of the rotating rod 9 extends out of the outer shell 8 and is fixedly fitted with a handle 901.

[0056] The rotating rod 9 has a hollow structure, with the section connecting it to the injection tube 10 being hollow, while the remaining sections are solid cylindrical tubes. The rotating rod 9 has an opening on its left side, which is connected to the inside of the injection tube 10.

[0057] The rotating rod 9 has a first opening 902 on its side wall corresponding to the liquid inlet guide pipe 11. When the first opening 902 of the rotating rod is rotated to the opening of the liquid inlet guide pipe 11, the liquid inlet guide pipe 11 is connected to the liquid injection pipe 10; otherwise, they are not connected.

[0058] The rotating rod 9 has a second opening 903 at the top and bottom of the corresponding position of the drain guide pipe 12. When the second opening 903 of the rotating rod is rotated to the vertical position, the upper and lower parts of the drain guide pipe 12 are connected to discharge liquid.

[0059] By setting the positions of the first opening 902 and the second opening 903 of the rotating rod, the connection state between the liquid inlet guide pipe 11 and the liquid injection pipe 10 and the connection state between the liquid outlet guide pipe 12 can only be selected as one of the two, and cannot be connected at the same time.

[0060] Example:

[0061] This device consists of two parts: the upper part accurately measures the liquid, and the lower part dispenses it.

[0062] The main components of the upper part are tank body 1, float 4, and variable volume adjustment rod 2. The main components of the lower part are spherical shell 8, injection pipe 10, inlet guide pipe 11, outlet guide pipe 12, and rotating rod 9.

[0063] Two openings 902 and 903, which are 90° apart from the axial tangent, are distributed on the rotating rod 9. Each opening passes through the rotating rod 9. The positions of the openings correspond to the positions of the liquid inlet guide pipe 10 and the liquid outlet guide pipe 12, respectively. The rotating rod 9 is nested inside the liquid injection pipe 10. Both ends of the liquid inlet guide pipe 10 and the liquid outlet guide pipe 12 are equipped with sealing rings.

[0064] The inner and outer diameters of the connection between the upper and lower halves are equal, and they are connected by bolts and sealed with a sealing ring 7.

[0065] The tank 1 is cylindrical, with an embedded piston 204. A variable-volume adjusting rod 2 is welded to the upper end of the piston 204. A circular vent 201 runs longitudinally through the center of the adjusting rod 2 to connect to the atmosphere and expel gas from the tank 1 during liquid measurement. The rod has an open-loop thread 202, with a 5mm wide flat graduated scale 203 on the open-loop side. The scale 203 is marked with graduations, a measuring range of (0-500) mL, and a minimum division of 5 mL. The graduations start at 0 and increase from top to bottom. To measure a specified volume of liquid, adjust the variable-volume adjusting rod 2 to the desired volume indication scale and tighten the locking nut 3. The locking nut is threaded with the variable-volume adjusting rod and can be screwed onto it. In practice, first adjust the variable-volume adjusting rod to the desired scale, then screw the locking nut downwards until it is tightly fitted against the top of the tank. At this point, the locking nut and the basic thread of the variable capacity adjustment rod form an effect similar to "double nut superposition and screwing", which can effectively enhance the fixed stability of the variable capacity adjustment rod after positioning.

[0066] Because the switch handle 901 and the rotating rod 9 are welded together, rotating the switch counterclockwise by 90° connects the inlet guide tube 11 with the left opening 902 on the rotating rod 9, and the outlet guide tube 12 is misaligned with the right opening 903 on the rotating rod 9, closing the connection. Liquid enters the tank 1 from the injection port through the inlet guide tube. When the set volume is reached, the float 4 triggers the full-load sensor 501, and the full-load indicator light 601 illuminates. At this time, rotating the switch handle clockwise by 90° causes the left and right openings on the rotating rod 9 to rotate synchronously, blocking the inlet guide tube 11. The outlet guide tube 12 connects to the right opening 903 on the rotating rod, and the measured liquid flows into the receiving container. When all the liquid is discharged, the bottom of the float 4 touches the empty-load sensor 502, and the empty-load indicator light 602 illuminates. This completes one measurement and filling process. The container is then placed directly below the outlet 1201. Rotating the switch handle counterclockwise by 90° initiates the next measurement and filling step, repeating this cycle to achieve batch processing. Depending on the sample size, two or more of these devices can be connected in series, allowing for single-person operation and improved work efficiency.

[0067] This utility model provides a concept and method for a laboratory liquid quantitative measuring and filling device. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A laboratory liquid dosing and filling apparatus, characterized in that, include: Interconnected metering and switching components; wherein, The metering component includes a hollow cylindrical tank (1), the bottom of which is connected to the top of the metering component; the tank (1) is provided with a variable volume adjustment rod (2) for adjusting the volume of the hollow cavity of the tank (1); The switching component It includes an outer shell (8), the top of which is connected to the bottom of the tank (1); a switch device is provided inside the outer shell (8), the top of which is connected to the hollow cavity of the tank (1), the bottom of which protrudes from the bottom of the outer shell (8) for discharging liquid inside the hollow cavity, and the side of which protrudes from the side wall of the outer shell (8) for conveying liquid into the hollow cavity.

2. A laboratory liquid dosing and filling apparatus according to claim 1, characterized in that The hollow cavity is equipped with a liquid level monitoring component for monitoring the liquid level.

3. A laboratory liquid dosing and filling apparatus according to claim 2, characterised in that, The liquid level monitoring component includes: A float (4) is installed in the hollow cavity. A full load sensor (501) and an empty load sensor (502) are fixed at the top and bottom of the hollow cavity, respectively. The full load sensor (501) and the empty load sensor (502) are electrically connected to the full load indicator light (601) and the empty load indicator light (602), respectively.

4. A laboratory liquid dosing and filling apparatus according to claim 1, characterized in that, The variable capacity adjustment rod (2) is inserted into the tank body (1) along the axial direction. The variable capacity adjustment rod (2) is provided with an external thread (202). The top of the tank body (1) is provided with an internal thread. The variable capacity adjustment rod (2) is threadedly connected to the tank body (1). The top of the variable capacity adjustment rod (2) is fitted with a locking nut (3). The internal thread of the locking nut (3) engages with the external thread (202).

5. A laboratory liquid dosing and filling apparatus according to claim 4, characterized in that The external thread (202) is an open thread. A vertical scale (203) is provided on the external thread (202) along the axial direction of the variable capacity adjustment rod (2) to mark the high and low positions of the variable capacity adjustment rod (2).

6. A laboratory liquid dosing and filling apparatus according to claim 4, characterized in that A piston (204) is fixed at the bottom of the variable capacity adjustment rod (2). The bottom surface of the piston (204), the bottom of the tank (1), and the inner wall together form the hollow cavity.

7. A laboratory liquid dosing and filling apparatus according to claim 6, characterized in that The variable capacity regulating rod (2) has a vent (201) along the axial direction. The vent (201) connects the hollow cavity to the atmosphere for pressure equalization.

8. A laboratory liquid dosing and filling apparatus according to claim 1, characterized in that The switching device includes: An inverted Y-shaped tee pipe is installed inside the outer shell (8). The tee pipe consists of a top opening, an inlet guide pipe (11), and a drain guide pipe (12). The top opening of the tee pipe passes through the top of the outer shell (8) and the bottom of the tank (1) and communicates with the hollow cavity of the tank (1). The drain guide pipe (12) has a drain port (1201) at its bottom. The inlet guide pipe (11) and the drain guide pipe (12) are respectively connected to a horizontally arranged injection pipe (10). One end of the injection pipe (10) extends from the side of the outer shell (8) and has an injection port (1001). The other end is fixed on the inner wall of the outer shell (8). The bottom end of the inlet guide pipe (11) is connected to the side wall of the injection pipe (10), and the top end is connected to the side wall of the drain guide pipe (12); the upper end of the drain guide pipe (12) is connected to the top opening of the tee pipe, and the lower end passes vertically through the middle of the injection pipe (10). That is, the injection pipe (10) has through holes at the top and bottom corresponding to the position of the drain guide pipe (12), which are connected to the upper and lower parts of the drain guide pipe (12) respectively. The injection tube (10) is fitted with a rotating rod (9). The rotating rod (9) is a hollow structure, with one end closed and extending out of the outer shell (8), and the other end open and communicating with the inside of the injection tube (10). The rotating rod (9) has a first opening (902) on its side wall at the corresponding position at the bottom end of the liquid inlet guide pipe (11), which connects to or closes the liquid inlet guide pipe (11); The rotating rod (9) has a second rotating rod opening (903) on both the top and bottom at the corresponding position where the drain pipe (12) passes through, so as to connect or close the drain pipe (12). The connection or closure of the first opening (902) and the second opening (903) of the rotating rod is a selectable state.

9. A laboratory liquid dosing and filling apparatus according to claim 8, characterized in that The rotating rod (9) has a handle (901) fixed at one end through the outer shell (8).

10. A laboratory liquid dosing and filling apparatus according to claim 1, characterized in that, The metering component and the switching component are connected by bolts, and a first sealing ring (7) is provided at the connection.

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