An online measuring device for liquid volatilization

Abstract

The invention belongs to the field of liquid measurement, and discloses an online measuring device for liquid volatilization, comprising an electronic balance and a bracket installed inside the balance, and a sealed container placed in the bracket, wherein a vertically movable weighing chassis is arranged in the sealed container, the weighing chassis is used to place the liquid container, a vertically movable frame plate is arranged in the bracket, and the weight of the liquid container can be weighed by using the frame plate in conjunction with the weighing chassis and the sealed container, and a lifting motor is symmetrically arranged on the bracket to drive the middle bracket; with a measuring device adopting this structure, liquid can be stored in the liquid container for a long time by using the sealed container, and during measurement, the lifting motor is controlled by a control device to move downward so that the weighing chassis is in full contact with the weighing pan of the balance, and the weighing chassis is completely separated from the sealed container, thereby achieving accurate measurement; in this way, the liquid can be kept in a stable environment for a long time, and problems such as container contamination caused by repeated taking can be avoided, which leads to a decrease in measurement accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid measurement, and in particular relates to an online measurement device for liquid volatilization. Background Art

[0002] Volatile liquids tend to evaporate into gas when affected by temperature, such as direct sunlight, ground heat radiation, high-temperature conduction of the oil pump, heating of the return oil temperature of the return oil pipe, or other environmental changes. This requires testing the volatility of the liquid to determine its safety and other characteristics.

[0003] At the same time, in the preparation process of standard gas, liquid volatilization is often used. This is because the volatilization amount of many liquids is constant at a specific temperature and a specific concentration. In this way, various standard gases can be obtained. Regardless of the above-mentioned uses, it is necessary to continuously measure the volatilization amount of volatile liquids. The existing measurement method is generally a weighing method, that is, the liquid to be tested is continuously volatilized in a stable environment, and its mass is measured regularly. The volatilization amount can be estimated by the change in mass. However, the disadvantage of this method is that the weighing place and the liquid placement place are different. Each measurement requires manual transfer of the container containing the liquid to be tested. During this process, due to changes in the environment and operational errors, the error in volatilization detection is likely to increase. At the same time, manual operation can easily contaminate the liquid, making the final test result inaccurate, and the data obtained or the prepared standard gas is difficult to meet the process requirements. How to solve the above problems has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] In order to overcome the deficiencies in the prior art, the present invention provides an online measuring device for the volatilization amount of a liquid, the device comprises a balance and a bracket installed inside the balance, and a sealed container placed in the bracket, a vertically movable weighing chassis is arranged in the sealed container, the weighing chassis is used to place the liquid container, a vertically movable frame plate is arranged in the bracket, the weight of the liquid container can be weighed by using the frame plate in conjunction with the weighing chassis and the sealed container, and a lifting motor is symmetrically arranged on the bracket to drive the middle bracket; with a measuring device of this structure, the liquid can be stored in the liquid container for a long time by using the sealed container, and during measurement, the lifting motor is controlled by the control device to move downward so that the weighing chassis is in full contact with the weighing pan of the balance, and at the same time, the weighing chassis is completely separated from the sealed container, so as to achieve accurate measurement; in this way, the liquid can be kept in a stable environment for a long time, and problems such as container contamination caused by repeated taking can be avoided, which leads to a decrease in measurement accuracy.

[0005] Since the measurement of liquid volatilization in the prior art requires manual picking up and measuring of the container containing the liquid, which can easily lead to contamination and damage of the container, the inventor finally decided to store the container for storing volatile liquid in a stable environment for a long time to measure its volatilization. In order to avoid the disadvantages brought by manual operation, a mechanical structure is used to achieve contact adjustment between the liquid container and the measuring balance. When not measuring, the liquid container and the balance pan are not in contact. Only when measuring do the two contact to achieve weighing. In this way, the weight fluctuation caused by liquid volatilization can be measured in a more stable environment, which better reflects the degree of liquid volatilization and improves the measurement accuracy. In addition, the automatic control device can realize timed measurement. Based on the above concept, the inventor provides a specific technical solution as follows:

[0006] An online measuring device for liquid volatilization, comprising a balance and a bracket installed inside the balance, and a sealed container placed inside the bracket, wherein a vertically movable weighing chassis is arranged inside the sealed container, the weighing chassis is used to place the liquid container, and a vertically movable frame plate is arranged inside the bracket, and the weight of the liquid container can be weighed by using the frame plate in conjunction with the weighing chassis and the sealed container, and a lifting motor is symmetrically arranged on the bracket to drive the middle bracket;

[0007] The sealed container is composed of an upper sealing cover, a sealing cylinder, a weighing chassis, a sealing clamp ring and a lower sealing cover, wherein the weighing chassis is composed of a tray, a weighing seat and an outer sealing ring, wherein the shape of the outer sealing ring is adapted to the sealing clamp ring, and the corresponding contact surfaces of the two are in a bell-mouth shape; the weighing seat passes through the sealing clamp ring and the lower sealing cover;

[0008] The sealed container adopting this structure can be assembled in the above-mentioned order, and then the liquid container containing volatile liquid is placed on the tray of the weighing chassis, and then the upper sealing cover is installed to form a sealed container. Since the shape of the outer sealing ring of the weighing chassis is adapted to the sealing clamp ring, under normal conditions, under the action of gravity, the outer sealing ring of the weighing chassis is completely in contact with the sealing clamp ring to achieve sealing inside the sealing cylinder. When the entire sealed container is lowered with the bracket, the weighing seat contacts the balance pan and can support its weighing chassis and the liquid container placed thereon. At this time, the entire weighing chassis has no contact with the sealed container. In this way, the balance can be used to weigh only the weight of the chassis and the liquid container placed thereon, without weighing the entire sealed container. Therefore, a high-precision electronic balance can be used for weighing to improve the weighing accuracy.

[0009] The bracket is composed of a fixed upper bracket, a middle bracket and a lower bracket, the frame plate is located on the middle bracket, and the bracket also includes a column that passes through the upper bracket, the middle bracket and the lower bracket. The middle bracket can move vertically under the limiting action of the column. The frame plate is located at the center of the middle bracket, and an opening is provided in the center of the frame plate. The diameter of the opening is larger than the diameter of the weighing seat of the weighing chassis; lifting motors are symmetrically arranged on the upper bracket, and the lifting rod at the bottom of the motor is fixedly connected to the middle bracket.

[0010] With this structure of the bracket, the upper bracket and the lower bracket are fixed, and together with the columns can provide stable support for the entire bracket, while the lifting motors are symmetrically arranged to provide power for the lifting of the middle bracket, and the lifting speed is regulated by an external control device.

[0011] Preferably, a heating and insulation layer is provided on the outside of the sealed container. This structure can realize precise control of the temperature inside the sealed container and provide corresponding temperature guarantee for liquid volatilization. The heating and insulation layer can adopt various existing electric heating structures and utilize external power supply for energy.

[0012] Furthermore, an air inlet, an air outlet and a temperature measuring port are provided on the upper sealing cover. By introducing inert gas into the sealed container through the air inlet, the volatilized gas can be carried out of the sealed container for use in detecting or preparing standard gas, etc.; through the temperature measuring port, a precision temperature measuring instrument can be used to detect the temperature in the sealed container to obtain more accurate data.

[0013] Based on the above structure, the specific working process of the measuring device of this application is as follows:

[0014] First, place the entire bracket in the weighing room of the electronic balance, align the opening on the frame plate with the balance pan, then assemble the sealed container and ensure that the weighing chassis can be freely lifted and lowered vertically, place the sealed container on the opening, install a heating and insulation device on its outside, then open the upper sealing cover, carefully place the container containing the liquid to be tested on the tray, then cover the upper sealing cover and install the air inlet pipe, air outlet pipe and thermometer, test that the lifting motor can normally drive the middle bracket to move vertically, and make sure that the weighing seat and the balance pan can fully contact and support the weighing chassis to completely separate from the sealed container, then close the weighing room of the electronic balance to form a relatively sealed environment. As the liquid evaporates, its weight will gradually decrease. At this time, regularly control the lifting motor to drive the middle bracket to lift and lower, and the weight change of the container containing the liquid to be tested can be measured; the volatilized gas can leave the sealed container driven by the inert gas.

[0015] Preferably, the electronic balance weighing chamber is provided with a dedicated opening to facilitate the extraction of air inlet pipes, air outlet pipes, power lines and other lines from the weighing chamber. Preferably, the opening is provided with a sealing structure to prevent the external environment from affecting the accuracy of the balance.

[0016] Compared with the prior art, the above-mentioned measurement process does not require human intervention, which reduces the error caused by manual operation. When not measuring, the weighing chassis is not in contact with the scale pan, and the entire weighing chassis is in full contact with the sealing clamp ring, thereby realizing a sealed environment in the sealed container. During the measurement process, except for the weighing chassis and the container placed thereon, the weight of the entire sealed container and the heating and insulation layer acts completely on the frame plate and does not act on the scale pan. Therefore, the weight measured by the scale pan is very small, which can greatly improve the measurement accuracy. More importantly, since the above-mentioned processes are all controlled by the control device, the vertical stroke of the controllable central bracket is greatly shortened, and accurate data can be measured by only controlling the weighing chassis to be completely separated from the sealing clamp ring, which greatly improves the stability of the entire device. The entire placement and measurement process is completed in the electronic balance, which ensures the consistency of the environment, and the electronic balance can be corrected at any time, further improving the measurement accuracy. The above-mentioned structure is proposed and designed for the first time in this application, filling the gap in this field.

[0017] To sum up, with the measuring device of the above structure, the liquid can be stored in the liquid container for a long time by using a sealed container. During measurement, the control device controls the lifting motor to move downward so that the weighing chassis is in full contact with the balance weighing pan, and at the same time, the weighing chassis is completely separated from the sealed container, thereby achieving accurate measurement. In this way, the liquid can be kept in a stable environment for a long time, avoiding problems such as container contamination caused by repeated taking, which leads to a decrease in measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the on-line measuring device for liquid volatilization amount of the present invention;

[0019] Figure 2 It is a side view of the on-line measuring device for liquid volatilization amount of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the support and the sealed container of the present invention;

[0021] Figure 4 is a schematic diagram of the structure of the bracket of the present invention;

[0022] Figure 5 and 6 Schematic diagrams of the structure of the sealed container of the present invention at different angles;

[0023] Figure 7 This is a schematic diagram of the exploded structure of the sealed container of the present invention;

[0024] Figure 8 It is a structural schematic diagram of the weighing chassis of the present invention;

[0025] In the figure: 1. electronic balance; 2. heating and insulation layer; 3. bracket; 31. lower bracket; 32. middle bracket; 33. column; 34. lifting motor; 35. upper bracket; 36. lifting rod; 37. shelf; 38. opening; 4. sealed container; 41. upper sealing cover; 42. sealing cylinder; 43. weighing chassis; 431. tray; 432. outer sealing ring; 433. weighing seat; 44. sealing clamp ring; 45. lower sealing cover; 46. through hole. DETAILED DESCRIPTION

[0026] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0027] Example 1

[0028] An online measuring device for liquid volatilization comprises an electronic balance 1 and a bracket 3 installed inside the balance, and a sealed container 4 placed inside the bracket, wherein a vertically movable weighing chassis 43 is arranged inside the sealed container 4, and the weighing chassis 43 is used to place the liquid container, and a vertically movable shelf 37 is arranged inside the bracket 3, and the weight of the liquid container can be weighed by using the shelf 37 in conjunction with the weighing chassis and the sealed container, and a lifting motor 34 is symmetrically arranged on the bracket 3 to drive the middle bracket;

[0029] The sealed container 4 is composed of an upper sealing cover 41, a sealing cylinder 42, a weighing chassis 43, a sealing clamp ring 44 and a lower sealing cover 45, wherein the weighing chassis 43 is composed of a tray 431, a weighing seat 433 and an outer sealing ring 432, wherein the shape of the outer sealing ring 432 is adapted to the sealing clamp ring 44, and the corresponding contact surfaces of the two are in a bell-mouth shape; the sealing clamp ring 44 and the lower sealing cover 45 are both provided with openings, and the weighing seat 433 passes through the sealing clamp ring 44 and the lower sealing cover 45;

[0030] The sealed container adopting this structure can be assembled in the above-mentioned order, and then the liquid container containing volatile liquid is placed on the tray of the weighing chassis, and then the upper sealing cover is installed to form a sealed container. Since the shape of the outer sealing ring of the weighing chassis is adapted to the sealing clamp ring, under normal conditions, under the action of gravity, the outer sealing ring of the weighing chassis is completely in contact with the sealing clamp ring to achieve sealing inside the sealing cylinder. When the entire sealed container is lowered with the bracket, the weighing seat contacts the balance pan and can support its weighing chassis and the liquid container placed thereon. At this time, the entire weighing chassis has no contact with the sealed container. In this way, the balance can be used to weigh only the weight of the weighing chassis and the liquid container placed thereon, without weighing the entire sealed container. Therefore, a high-precision electronic balance can be used for weighing to improve the weighing accuracy.

[0031] The support 3 is composed of a fixed upper support 35, a middle support 32 and a lower support 31. The frame plate 37 is located on the middle support 32. The support 3 also includes a column 33 that passes through the upper support, the middle support and the lower support. The middle support 32 can move vertically under the limiting action of the column 33. The frame plate 37 is located at the center of the middle support, and an opening 38 is provided at the center of the frame plate 37. The diameter of the opening 38 is larger than the diameter of the weighing seat 433 of the weighing chassis; a lifting motor 34 is symmetrically arranged on the upper support 35, and the lifting rod 36 at the bottom of the motor is fixedly connected to the middle support 32.

[0032] With this structure of the bracket, the upper bracket and the lower bracket are fixed, and together with the columns can provide stable support for the entire bracket, while the lifting motors are symmetrically arranged to provide power for the lifting of the middle bracket, and the lifting speed is regulated by an external control device.

[0033] Preferably, a heating and insulation layer 2 is provided on the outside of the sealed container 4. This structure can realize precise control of the temperature inside the sealed container and provide corresponding temperature guarantee for liquid volatilization. The heating and insulation layer can adopt various existing electric heating structures and utilize external power supply for energy.

[0034] Furthermore, three through holes 46 are provided on the upper sealing cover, which are an air inlet, an air outlet and a temperature measuring port. Inert gas is introduced into the sealed container through the air inlet, and the volatilized gas can be carried out of the sealed container for use in detecting or preparing standard gas, etc.; the temperature in the sealed container can be detected by a precision temperature measuring instrument through the temperature measuring port to obtain more accurate data.

[0035] Preferably, the weighing chamber of the electronic balance 1 is provided with a dedicated opening to facilitate leading out of the air inlet pipe, air outlet pipe, power line and other lines from the weighing chamber. Preferably, the opening is provided with a sealing structure to prevent the external environment from affecting the accuracy of the electronic balance.

[0036] Example 2

[0037] The specific working process of the online measurement device for liquid evaporation is as follows:

[0038] First, place the entire bracket in the weighing room of the electronic balance, align the opening on the frame plate with the balance pan, then assemble the sealed container and ensure that the weighing chassis can be freely lifted and lowered vertically, place the sealed container on the opening, install a heating and insulation device on its outside, then open the upper sealing cover, carefully place the container containing the liquid to be tested on the tray, then cover the upper sealing cover and install the air inlet pipe, air outlet pipe and thermometer, test that the lifting motor can normally drive the middle bracket to move vertically, and make sure that the weighing seat and the balance pan can fully contact and support the weighing chassis to completely separate from the sealed container, then close the weighing room of the electronic balance to form a relatively sealed environment. As the liquid evaporates, its weight will gradually decrease. At this time, regularly control the lifting motor to drive the middle bracket to lift and lower, and the weight change of the container containing the liquid to be tested can be measured; the volatilized gas can leave the sealed container driven by the inert gas.

[0039] Compared with the prior art, the above-mentioned measurement process does not require human intervention, which reduces the error caused by manual operation. When not measuring, the weighing chassis is not in contact with the scale pan, and the entire weighing chassis is in full contact with the sealing clamp ring, thereby realizing a sealed environment in the sealed container. During the measurement process, except for the weighing chassis and the container placed thereon, the weight of the entire sealed container and the heating and insulation layer acts completely on the frame plate and does not act on the scale pan. Therefore, the weight measured by the scale pan is very small, which can greatly improve the measurement accuracy. More importantly, since the above-mentioned processes are all controlled by the control device, the vertical stroke of the controllable central bracket is greatly shortened, and accurate data can be measured by only controlling the weighing chassis to be completely separated from the sealing clamp ring, which greatly improves the stability of the entire device. The entire placement and measurement process is completed in the electronic balance, which ensures the consistency of the environment, and the electronic balance can be corrected at any time, further improving the measurement accuracy. The above-mentioned structure is proposed and designed for the first time in this application, filling the gap in this field.

Claims

1. An online measuring device for liquid volatilization, comprising an electronic balance (1), characterized in that: It also includes a support (3) installed inside the balance, and a sealed container (4) placed inside the support, a vertically movable weighing chassis (43) is arranged inside the sealed container (4), a vertically movable frame plate (37) is arranged inside the support (3), and a lifting motor (34) is symmetrically arranged on the support (3) to drive the middle support (32); The sealed container (4) is composed of an upper sealing cover (41), a sealing cylinder (42), a weighing chassis (43), a sealing snap ring (44) and a lower sealing cover (45); the weighing chassis (43) is composed of a tray (431), a weighing seat (433) and an outer sealing ring (432), wherein the shape of the outer sealing ring (432) is adapted to the sealing snap ring (44), and the corresponding contact surfaces of the two are in a trumpet shape; the bracket (3) is composed of a fixed upper bracket (35), a middle bracket (32) and a lower bracket (31), the frame plate (37) is located on the middle bracket (32), the frame plate (37) is located at the center of the middle bracket, and an opening (38) is provided at the center of the frame plate (37), the diameter of the opening (38) is larger than the diameter of the weighing seat (433) of the weighing chassis; a lifting motor (34) is symmetrically provided on the upper bracket (35), and a lifting rod (36) at the bottom of the motor is fixedly connected to the middle bracket (32).

2. The on-line measuring device for liquid volatilization according to claim 1, characterized in that: The sealing clamp ring (44) and the lower sealing cover (45) are both provided with openings, and the weighing seat (433) passes through the sealing clamp ring (44) and the lower sealing cover (45).

3. The on-line measuring device for liquid volatilization according to claim 1, characterized in that: The bracket (3) further comprises a column (33) penetrating the upper bracket, the middle bracket and the lower bracket, and the middle bracket (32) moves vertically under the limiting action of the column (33).

4. The on-line measuring device for liquid volatilization according to claim 1, characterized in that: A heating and heat-insulating layer (2) is provided on the outer side of the sealed container (4).

5. The on-line measuring device for liquid volatilization according to claim 1, characterized in that: The upper sealing cover (41) is provided with three through holes (46), which are respectively an air inlet, an air outlet and a temperature measuring port.

6. The on-line measuring device for liquid volatilization according to claim 1, characterized in that: The weighing chamber of the electronic balance (1) is provided with an opening.

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