CN218066700U - A high-precision chemical instrument measurement and detection device - Google Patents

Abstract

The utility model discloses a high-precision chemical instrument measurement and detection device, which comprises a frame, a first pressure sensor, a liquid storage container, a lifting device, a carrier plate, a second pressure sensor, a weighing plate, a clamping mechanism, an infusion tube, valves and control panels. The chemical instrument to be tested can be stably clamped by the clamping mechanism, and the positions of the two clamping plates of the clamping mechanism can be adjusted, so that the chemical instrument can be clamped at the ideal position, and the infusion tube can be inserted into the waiting device with the lifting device. In the top opening of the detection chemical instrument, avoid the detection liquid from spilling outside the chemical instrument; by comparing the detection values of the first pressure sensor and the second pressure sensor, judge whether the difference between the two is within the normal deviation range, so as to ensure the accuracy of detection; If the deviation of the two is within the normal deviation range, calculate the ideal volume of the test solution, and then compare the actual volume of the test solution corresponding to the scale of the chemical instrument to judge the accuracy of the chemical instrument for measuring the solution.

Description

A high-precision chemical instrument measurement and detection device

technical field

The utility model relates to the technical field of measurement and detection, in particular to a high-precision chemical instrument measurement and detection device.

Background technique

The instruments used in chemical experiments are called chemical instruments, which are mainly divided into measuring instruments and reaction instruments. Measuring instruments can measure materials. Before the measurement chemical instrument is put into use, it is necessary to test the measurement of the chemical instrument to determine whether there is a measurement error.

In the prior art, the aqueous solution in the measuring cylinder is usually poured into the chemical instrument to check the scale value of the liquid level inside the chemical instrument to calculate the volume of the aqueous solution in the chemical instrument at this time, and then compare the value of the aqueous solution volume with the aqueous solution The volume value in the original graduated cylinder is compared to determine the accuracy of the chemical instrument for measuring the solution. The disadvantage of this method is that after the aqueous solution is poured into the chemical instrument from the graduated cylinder, if the aqueous solution is scattered, it needs to be re-prepared for testing. Thereby reducing the efficiency of chemical instrument detection.

The invention patent with the publication number CN114623894A discloses a chemical instrument measurement and detection device, which is provided with a micro-submersible pump, a water flow sensor and a PLC sensor, and the micro-submersible pump passes the aqueous solution in the water storage tank through the drain pipe, the water flow sensor and the PLC sensor in sequence. The water pipe can be adjusted to transport to the interior of the chemical instrument, and the water flow sensor monitors the flow of the aqueous solution flowing through it, and then calculates the volume of the aqueous solution after passing through the water flow sensor, and then checks the scale of the aqueous solution level in the chemical instrument The numerical value is convenient for the staff to detect the accuracy of the chemical instrument when measuring the aqueous solution.

The water flow sensor of the above-mentioned detection device detects the flow of water passing through it, but the length of the drain pipe is long. After the water pump is stopped, there will be some accumulated water in the drain pipe, and a small amount of aqueous solution will remain on the inner wall of the drain pipe, and this part of the water cannot be transported. To the inside of the chemical instrument, it will affect the detection accuracy.

Utility model content

Based on this, it is necessary to provide a high-precision chemical instrument measurement and detection device for the above technical problems.

In order to achieve the above purpose, the utility model provides a high-precision chemical instrument measurement and detection device, including:

frame;

The first pressure sensor is installed on the top of the frame;

The liquid storage container is arranged on the top of the frame and supported by the first pressure sensor, and is used to store the detection liquid;

Lifting device, installed at the bottom of the rack;

The carrier board is installed on the top of the lifting device and can be driven up and down in a straight line by the lifting device;

The second pressure sensor is installed on the top of the carrier plate;

a weighing plate is arranged above the carrier plate and supported by the second pressure sensor;

The clamping mechanism is installed on the weighing plate and is used to clamp the chemical instrument to be tested;

The infusion tube is arranged vertically and the upper end communicates with the liquid storage container;

The valve is installed on the infusion tube;

The control panel is installed on the frame and electrically connected with the first pressure sensor and the second pressure sensor.

Further, the clamping mechanism includes two symmetrically arranged fixed seats, on which screw rods are threaded, and the ends of the two screw rods are equipped with handwheels, and the opposite ends of the two screw rods are equipped with clamps through bearings. The holding plate is fixed with a polished rod parallel to the screw rod, and the other end of the polished rod passes through the fixing seat and is slidably connected with the fixing seat.

Further, a non-slip rubber pad is installed on the end surface of the clamping plate facing away from the screw rod.

Further, at least two first guide rods are fixed on the top of the frame, and first guide sleeves corresponding to the first guide rods are fixed on the liquid storage container, and the first guide sleeves are slidably fitted on the first guide rods , the top of the first guide rod is fixed with a first limit block, the first guide rod is covered with a first compression spring, the upper end of the first compression spring is connected with the first limit block, and the lower end of the first compression spring is connected with the first guide sleeve .

Further, at least two second guide rods are fixed on the top of the carrier board, second guide sleeves corresponding to the second guide rods are fixed on the weighing plate, and the second guide sleeves are slidably fitted on the second guide rods , the top of the second guide rod is fixed with a second limit block, the second guide rod is covered with a second compression spring, the upper end of the second compression spring is connected with the second limit block, and the lower end of the second compression spring is connected with the second guide sleeve .

Further, the top of the frame is provided with a first groove, and the lower part of the first pressure sensor is installed in the first groove.

Further, the top of the carrier board is provided with a second groove, and the lower part of the second pressure sensor is installed in the second groove.

Further, a container cover is detachably installed on the top of the liquid storage container, and the container cover is used to cover the liquid storage container.

Further, an operating handle is installed on the top of the container cover.

Compared with the prior art, this technical solution has the following beneficial effects:

1. The chemical instrument to be tested can be stably clamped by the clamping mechanism, and the positions of the two clamping plates can be adjusted, so that it is convenient to clamp the chemical instrument at the ideal position, so that the top of the chemical instrument is located directly below the infusion tube. Drip vertically to prevent the detection solution from spilling outside the chemical instrument;

2. Drive the carrier plate, weighing plate, and clamping mechanism up through the lifting device, so that the chemical instrument to be tested rises to the infusion tube, so that the infusion tube can be inserted into the top opening of the chemical instrument to be tested, preventing the test liquid from spilling on the chemical instrument outside;

3. The decrease of the pressure value detected by the first pressure sensor is the weight of the detection liquid output by the liquid storage container, and the increase of the pressure value detected by the second pressure sensor is the weight of the detection liquid entering the chemical instrument to be detected. By comparing the two Whether the deviation is within the range of the normal deviation interval, if the deviation of the two is too large and not within the normal deviation range, then re-test to ensure the accuracy of the detection; if the deviation of the two is within the normal deviation range, then Divide the weight of the test liquid detected by the second pressure sensor into the chemical instrument to be tested by the density of the test liquid at the experimental temperature and air pressure to obtain the ideal volume of the test liquid, and then compare the volume of the test liquid corresponding to the scale of the chemical instrument to be tested. The actual volume is used to judge the accuracy of chemical instruments for measuring solutions.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model;

In the figure, 1. Rack; 2. First pressure sensor; 3. Liquid storage container; 4. Lifting device; 5. Carrier plate; 6. Second pressure sensor; 7. Weighing plate; 8. Infusion tube; 9 , valve; 10, control panel; 11, fixed seat; 12, screw; 13, hand wheel; 14, bearing; 15, clamping plate; 16, polished rod; 17, non-slip rubber pad; 18, first guide rod; 19 , the first guide sleeve; 20, the first limit block; 21, the first compression spring; 22, the second guide rod; 23, the second guide sleeve; 24, the second limit block; 25, the second compression spring; 26. The first groove; 27. The second groove; 28. The container cover; 29. The operating handle.

detailed description

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below limit.

Please refer to Fig. 1, in one embodiment of the present utility model, a kind of high-precision chemical instrument measurement and detection device includes: frame 1, first pressure sensor 2, liquid storage container 3, lifting device 4, carrier plate 5 , a second pressure sensor 6, a weighing plate 7, a clamping mechanism, an infusion tube 8, a valve 9 and a control panel 10; wherein, the first pressure sensor 2 is installed on the top of the frame 1, and the first pressure sensor 2 is set to four And it is distributed in a rectangle; the liquid storage container 3 is arranged on the top of the frame 1, and is supported by the first pressure sensor 2, and is used to store the detection liquid, and the detection liquid can be distilled water; the lifting device 4 is installed at the bottom of the frame 1, and the lifting device 4 A hand-operated lifting platform is used, and other structures can also be selected according to needs, such as an electric lifting platform; the carrier plate 5 is installed on the top of the lifting device 4, and can be lifted and lowered in a straight line under the drive of the lifting device 4; the second pressure sensor 6 is installed on the carrier plate 5, the second pressure sensor 6 is set to four and distributed in a rectangle; the weighing plate 7 is arranged above the carrier plate 5 and is supported by the second pressure sensor 6; the clamping mechanism is installed on the weighing plate 7 for Clamp the chemical instrument to be tested; the infusion tube 8 is vertically arranged and the upper end communicates with the liquid storage container 3; the valve 9 is installed on the infusion tube 8, and the valve 9 is a manual regulating valve; the control panel 10 is installed on the frame A pressure sensor 2 is electrically connected to the second pressure sensor 6, and the control panel 10 is used to obtain the pressure data information detected by the first pressure sensor 2 and the second pressure sensor 6. The detected weight loss and the detected weight gain of the second pressure sensor 6 determine whether the deviation of the two is within the error range interval, and after determining that the deviation of the two is within the error range interval, according to the second pressure sensor 6 Divide the detected weight increase by the density of the test liquid to calculate the ideal volume of the test liquid in the chemical instrument to be tested, and judge the accuracy of the chemical instrument by comparing the actual volume of the test liquid corresponding to the scale of the chemical instrument to be tested.

In order to facilitate the clamping of different types of chemical instruments, the clamping mechanism is set to include two symmetrically arranged fixed seats 11, screw rods 12 are threaded on the fixed seats 11, and handwheels 13 are installed on the back ends of the two screw rods 12. One end opposite to each screw rod 12 is equipped with a clamping plate 15 by a bearing 14, the clamping plate 15 is fixed with a polished rod 16 parallel to the screw rod 12, and the polished rod 16 other end passes through the holder 11 and is slidably connected with the holder 11. The bearing 14 is a tapered roller bearing, which can withstand axial force and is convenient for the clamping plate 15 to clamp the chemical instrument; the fixing seat 11 is provided with a threaded hole and a round hole, the screw rod 12 is threadedly connected with the threaded hole, and the polished rod 16 slides with the round hole Connection; the screw 12 is turned by the hand wheel 13, and under the guidance of the polished rod 16, the screw 12 can drive the clamping plate 15 to move linearly, and the positions of the two clamping plates 15 can be adjusted, so that the chemical instrument can be clamped at the ideal position , so that the top of the chemical instrument is located directly below the infusion tube 8, and the detection solution is prevented from spilling outside the chemical instrument by vertically dripping.

In order to improve the clamping effect and avoid damaging the chemical instrument, an anti-slip rubber pad 17 is installed on the end face of the clamping plate 15 facing away from the screw rod 12 . Anti-skid rubber pad 17 has anti-skid effect, can clamp chemical instrument, and anti-skid rubber pad 17 also has certain elasticity, can not rigidly contact with chemical instrument, avoids excessive clamping force and damages chemical instrument.

In order to facilitate the first pressure sensor 2 to accurately detect the weight of the liquid storage container 3 and prevent the liquid storage container 3 from shaking and detaching from the first pressure sensor 2, two first guide rods 18 are fixed on the top of the frame 1. On the top of the liquid storage container 3 A first guide sleeve 19 corresponding to the first guide rod 18 is fixed, the first guide sleeve 19 is slidably fitted on the first guide rod 18, and the top of the first guide rod 18 is fixed with a first stopper 20, the first A first compression spring 21 is sleeved on the guide rod 18 , the upper end of the first compression spring 21 is connected with the first limiting block 20 , and the lower end of the first compression spring 21 is connected with the first guide sleeve 19 . The first guide rod 18 and the first guide sleeve 19 play a position-limiting role to prevent the liquid storage container 3 from shaking, and the first compression spring 21 provides the elastic force to press down, so that the liquid storage container 3 presses the first pressure sensor 2, and the first The pressure sensor 2 can stably detect the weight of the liquid storage container 3 .

In order to facilitate the second pressure sensor 6 to accurately detect the weight of the weighing plate 7, to prevent the weighing plate 7 from shaking and detaching from the second pressure sensor 6, two second guide rods 22 are fixed on the top of the carrier plate 5, and on the weighing plate 7 A second guide sleeve 23 corresponding to the second guide rod 22 is fixed, and the second guide sleeve 23 is slidably fitted on the second guide rod 22. The top of the second guide rod 22 is fixed with a second stopper 24. A second compression spring 25 is sleeved on the guide rod 22 , the upper end of the second compression spring 25 is connected with the second limiting block 24 , and the lower end of the second compression spring 25 is connected with the second guide sleeve 23 . The second guide rod 22 and the second guide sleeve 23 play a position-limiting role to prevent the weighing plate 7 from shaking, and the second compression spring 25 provides the elastic force to press down, so that the weighing plate 7 presses the second pressure sensor 6, and the second The pressure sensor 6 can stably detect the weight of the weighing plate 7 .

In order to facilitate the installation of the first pressure sensor 2 and reduce the gap between the liquid storage container 3 and the frame 1 , the top of the frame 1 is provided with a first groove 26 , and the lower part of the first pressure sensor 2 is installed in the first groove 26 . The number of first grooves 26 is the same as that of the first pressure sensor 2 , both of which are four.

In order to facilitate the installation of the second pressure sensor 6 and reduce the gap between the carrier plate 5 and the weighing plate 7 , the top of the carrier plate 5 is provided with a second groove 27 , and the lower part of the second pressure sensor 6 is installed in the second groove 27 . The second groove 27 is mathematically the same as the second pressure sensor 6 , and both have four.

In order to prevent impurities from entering the liquid container during the detection process and affect the detection accuracy, a container cover 28 is detachably installed on the top of the liquid storage container 3 , and the container cover 28 is used to cover the liquid storage container 3 . The container cover 28 can be buckled on the top of the liquid storage container 3 by snap-fitting, and can also be screwed on the top of the liquid storage container 3 by threaded connection.

For the convenience of taking and placing the container cover 28, an operating handle 29 is installed on the top of the container cover 28. The container cover 28 can be conveniently picked up by operating the handle 29, so that the container cover 28 can be installed or detached from the liquid storage container 3.

The working steps of this embodiment:

S1. Under the experimental temperature and air pressure, the chemical instrument to be tested is placed on the weighing plate 7, so that the top opening of the chemical instrument to be tested is located directly below the infusion tube 8, and then the chemical instrument to be tested is clamped by the clamping mechanism;

S2. Adjust the lifting device 4, the lifting device 4 drives the carrier plate 5, the weighing plate 7 and the clamping mechanism to rise, so that the chemical instrument to be tested rises to the 8 infusion tubes, and the 8 infusion tubes are inserted into the top of the chemical instruments to be tested open mouth

S3, operate the control panel 10, set the pressure detected by the second pressure sensor 6 as zero at this time, and record the pressure value detected by the first pressure sensor 2 at this time;

S4. Operate the valve 9, the detection liquid in the liquid storage container 3 is output to the chemical instrument to be tested by the infusion tube 8, and then close the valve 9;

S5, the decrease of the pressure value detected by the first pressure sensor 2 is the detection liquid weight output by the liquid storage container 3, and the increase of the pressure value detected by the second pressure sensor 6 is the detection liquid weight entering the chemical instrument to be detected, for comparison Whether the deviation of the two is within the range of the normal deviation range, if the deviation of the two is too large and not within the range of the normal deviation range, re-test; if the deviation of the two is within the range of the normal deviation range, the second pressure sensor 6 Divide the weight of the testing liquid that enters the chemical instrument to be tested by the density of the testing liquid at the experimental temperature and air pressure to obtain the ideal volume of the testing liquid, and then compare the actual volume of the testing liquid corresponding to the scale of the chemical instrument to be tested to judge The accuracy of chemical instruments for measuring solutions.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; may be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediary, and may be an internal communication between two elements or an interactive relationship between two elements, unless otherwise stated Clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiment.

Claims (9)

1. A high precision chemical instrumentation detection apparatus comprising:

a frame (1);

it is characterized by also comprising:

the first pressure sensor (2) is arranged at the top of the rack (1);

the liquid storage container (3) is arranged at the top of the rack (1), is supported by the first pressure sensor (2) and is used for storing detection liquid;

the lifting device (4) is arranged at the bottom of the rack (1);

the carrier plate (5) is arranged at the top of the lifting device (4) and can be driven by the lifting device (4) to lift linearly;

the second pressure sensor (6) is arranged at the upper end of the carrier plate (5);

the weighing plate (7) is arranged above the carrier plate (5) and is supported by the second pressure sensor (6);

the clamping mechanism is arranged on the weighing plate (7) and used for clamping the chemical instrument to be detected;

the infusion tube (8) is vertically arranged, and the upper end of the infusion tube is communicated with the liquid storage container (3);

a valve (9) mounted on the infusion tube (8);

and the control panel (10) is installed on the rack (1) and is electrically connected with the first pressure sensor (2) and the second pressure sensor (6).

2. The high-precision chemical instrument metering detection device according to claim 1, wherein the clamping mechanism comprises two symmetrically arranged fixed seats (11), each fixed seat (11) is provided with a screw (12) in a threaded manner, each backward end of the two screws (12) is provided with a hand wheel (13), each opposite end of the two screws (12) is provided with a clamping plate (15) through a bearing (14), each clamping plate (15) is fixed with a polished rod (16) arranged in parallel with the screw (12), and the other end of each polished rod (16) penetrates through the fixed seat (11) and is in sliding connection with the fixed seat (11).

3. A high accuracy chemical instrumentation detection device according to claim 2 wherein an anti-slip rubber pad (17) is mounted on the end surface of the clamping plate (15) facing away from the screw (12).

4. The high-precision chemical instrument metering detection device according to claim 1, wherein at least two first guide rods (18) are fixed to the top of the rack (1), first guide sleeves (19) corresponding to the first guide rods (18) one by one are fixed to the liquid storage container (3), the first guide sleeves (19) are slidably sleeved on the first guide rods (18), first limit blocks (20) are fixed to the top of the first guide rods (18), first pressure springs (21) are sleeved on the first guide rods (18), the upper ends of the first pressure springs (21) are connected with the first limit blocks (20), and the lower ends of the first pressure springs (21) are connected with the first guide sleeves (19).

5. The high-precision chemical instrument metering detection device according to claim 1, wherein at least two second guide rods (22) are fixed on the top of the carrier plate (5), second guide sleeves (23) which correspond to the second guide rods (22) one by one are fixed on the weighing plate (7), the second guide sleeves (23) are slidably sleeved on the second guide rods (22), second limit blocks (24) are fixed on the top of the second guide rods (22), second pressure springs (25) are sleeved on the second guide rods (22), the upper ends of the second pressure springs (25) are connected with the second limit blocks (24), and the lower ends of the second pressure springs (25) are connected with the second guide sleeves (23).

6. A high accuracy chemo-instrumental detection device according to claim 1, characterized in that the top of the frame (1) is provided with a first groove (26), and the lower part of the first pressure sensor (2) is mounted in the first groove (26).

7. A high accuracy chemical instrumentation detection device according to claim 1 wherein the carrier plate (5) is provided with a second groove (27) on top and the second pressure sensor (6) is mounted with its lower portion in the second groove (27).

8. A high accuracy chemical instrumentation measurement device according to claim 1, wherein a container cover (28) is detachably mounted on the top of the liquid storage container (3), and the container cover (28) is used for covering the liquid storage container (3).

9. A high accuracy chemical instrumentation detection device according to claim 8 wherein an operating handle (29) is mounted on top of the container lid (28).

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