CN217359479U

CN217359479U - Liquid density real-time measuring device based on lever principle and electronic scale

Info

Publication number: CN217359479U
Application number: CN202221295621.3U
Authority: CN
Inventors: 李凡生; 刘丽勤
Original assignee: Guangxi Normal University for Nationalities
Current assignee: Guangxi Normal University for Nationalities
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-02
Anticipated expiration: 2032-05-27

Abstract

The utility model relates to a teaching equipment field specifically discloses a liquid density real-time measuring device based on lever principle and electronic scale, including the lever frame, the one end below of lever frame is provided with the crane, the other end below of lever frame is provided with the electronic scale, the electronic scale reaches the top of crane is located the front surface of lever frame all is provided with the lever arm, the last surface mounting of crane has the beaker, the inside of beaker is provided with the float, the top of electronic scale is provided with the counter weight bottle, accommodate the lead screw is all installed at the both ends of lever frame, the counter weight nut is installed in accommodate the lead screw's the outside. The sliding block at the lower end of the scissor type support can slide in the support sliding groove, the purpose of controlling the lifting frame to integrally lift is achieved, the submergence degree of the floater in the beaker is adjusted, when liquid to be measured just submerges the floater, the liquid discharge amount can be obtained, and errors caused by the method of collecting after the liquid is directly discharged are avoided.

Description

Liquid density real-time measuring device based on lever principle and electronic scale

Technical Field

The utility model relates to a teaching equipment field specifically is a liquid density real-time measuring device based on lever principle and electronic scale.

Background

The density of the liquid is the mass of a unit volume substance at a specified temperature, when the density of the liquid is measured, a small amount of liquid sample is injected into a vibrating sample tube, the change of the mass of the sample tube causes the change of the vibration frequency, the density of the sample is calculated by combining calibration data, and in the measuring process, the temperature of the sample can be accurately measured, the capability of controlling the temperature of the sample is realized, and meanwhile, the precision required by the standard is achieved.

However, in the teaching experiment, the diffusion of the densitometer cannot be guaranteed, and the density is usually detected by the drainage method, but the volume of the water discharged in the drainage method detection is measured after being transferred, and a large error is generated.

SUMMERY OF THE UTILITY MODEL

To current problem, the utility model provides a liquid density real-time measuring device based on lever principle and electronic scale, the device cooperation is used the problem that can propose in the effectual solution background art.

In order to solve the above problem, the utility model adopts the following technical scheme:

the utility model provides a liquid density real-time measurement device based on lever principle and electronic scale, includes the lever frame, the one end below of lever frame is provided with the crane, the other end below of lever frame is provided with the electronic scale, the electronic scale reaches the top of crane is located the front surface of lever frame all is provided with the lever arm, the couple is installed to the lower extreme of lever arm, the last surface mounting of crane has the beaker, the inside of beaker is provided with the float, the top of electronic scale is provided with the counter weight bottle, accommodate the lead screw is all installed at the both ends of lever frame, the counter weight nut is installed in accommodate the outside of lead screw.

As a further aspect of the present invention: the lifting frame is characterized in that a base is arranged below the lifting frame, a scissor type support is connected between the base and the lifting frame, one end of the scissor type support is located on the outer side of the base and provided with a support sliding groove, a lifting screw rod is mounted on the lower surface of the lifting frame, and a crank is mounted at one end of the lifting screw rod.

As a further aspect of the present invention: the balance weight nut is meshed with the adjusting screw rod and is rotationally connected with the adjusting screw rod, and the two lever arms are rotationally connected with the lever frame.

As a further aspect of the present invention: the beaker is a transparent glass component, and the counterweight bottle and the floater are both positioned on a plastic component.

As the utility model discloses further scheme again: the outer side of one end of the scissor type support is located inside the support sliding groove, a sliding block is installed inside the scissor type support, and the other end of the scissor type support is rotatably connected with the base through a rotating shaft.

As a further aspect of the present invention: the lifting screw rod is meshed with the lifting frame and is rotationally connected with the lifting frame.

As a further aspect of the present invention: the counterweight bottle, the floater and the hook are connected through long strings with equal length.

As the utility model discloses further scheme again: the adjusting screw rod is fixedly connected with the lever frame in a meshed mode.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the rotation that can control the counter weight nut in the accommodate the lead screw's at both ends the whole balance that adjusts the lever frame, thereby it eliminates the influence of lever dead weight to the experiment to guarantee that the lever frame transfers horizontal position.

2. The sliding block at the lower end of the scissor type support can slide in the support sliding groove, the purpose of controlling the lifting frame to integrally lift is achieved, the submergence degree of the floater in the beaker is adjusted, when liquid to be measured just submerges the floater, the liquid discharge amount can be obtained, and errors caused by the method of collecting after the liquid is directly discharged are avoided.

Drawings

FIG. 1 is a schematic view showing a structure of a liquid density real-time measuring apparatus based on a lever principle and an electronic scale;

FIG. 2 is a cross-sectional view of a lifting frame in a liquid density real-time measuring apparatus based on the lever principle and an electronic scale;

FIG. 3 is an enlarged view of the position A of a real-time liquid density measuring apparatus based on the lever principle and an electronic scale.

In the figure: 1. a lever frame; 2. a lifting frame; 3. an electronic scale; 4. a lever arm; 5. a counterweight bottle; 6. a float; 7. a beaker; 8. hooking; 101. adjusting a screw rod; 102. a counterweight nut; 201. lifting a screw rod; 202. a scissor-type stand; 203. a base; 204. a bracket chute; 205. a crank handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figures 1-3, the embodiment provides a liquid density real-time measuring device based on a lever principle and an electronic scale, which comprises a lever frame 1, wherein a lifting frame 2 is arranged below one end of the lever frame 1, an electronic scale 3 is arranged below the other end of the lever frame 1, lever arms 4 are arranged on the electronic scale 3 and the front surface of the lifting frame 2, which is positioned above the lever frame 1, the two lever arms 4 are rotatably connected with the lever frame 1, a hook 8 is arranged at the lower end of the lever arms 4, a beaker 7 is arranged on the upper surface of the lifting frame 2, liquid to be measured is filled in the beaker 7, a floater 6 is arranged in the beaker 7, a counterweight bottle 5 is arranged above the electronic scale 3, the electronic scale 3 is arranged for weighing the filled weight of the counterweight bottle 5 and the floater 6, the counterweight bottle 5 and the floater 6 are connected with the hook 8 through thin ropes with equal length, can reduce the interference to the experiment, accommodate the lead screw 101 is all installed at the both ends of lever frame 1, and counter weight nut 102 is installed in accommodate the lead screw 101's the outside, can control the rotation that counter weight nut 102 adjusted lever frame 1's overall balance in the accommodate the lead screw 101's at both ends the outside, thereby it eliminates the influence of lever dead weight to the experiment to guarantee lever frame 1 to transfer horizontal position.

As shown in fig. 1-2, a base 203 is arranged below the lifting frame 2, a scissor type bracket 202 is connected between the base 203 and the lifting frame 2, a bracket chute 204 is arranged at one end of the scissor type bracket 202, which is positioned at the outer side of the base 203, a lifting lead screw 201 is arranged at the lower surface of the lifting frame 2, a crank 205 is arranged at one end of the lifting lead screw 201, when a torsion force is applied to the crank 205, the lifting lead screw 201 can drive one end of the scissor type bracket 202 to move towards the crank 205, a slider at the lower end of the scissor type bracket 202 can slide in the bracket chute 204, so as to achieve the purpose of controlling the lifting frame 2 to integrally lift, and thus the submergence degree of the floater 6 in the beaker 7 can be adjusted.

The utility model discloses a theory of operation is: when the device is used, media with equal mass, such as sand and stones, are filled in the floater 6 and the counterweight bottle 5, data are weighed and recorded on the electronic scale 3, the floater 6 and the counterweight bottle 5 are connected by the strings and the hooks 8 respectively, the counterweight bottle 5 is placed on the upper surface of the electronic scale 3, the integral balance of the two lever arms 4 is controlled by adjusting the distance between the counterweight nut 102 and the adjusting screw rod 101, meanwhile, the numerical value on the electronic scale 3 is cleared, then liquid to be measured is injected into the beaker 7, and torque is gradually applied to the crank 205, so that the lifting screw rod 201 drives one end of the scissor type support 202 to move towards the crank 205, the sliding block at the lower end of the scissor type support 202 slides in the support sliding groove 204, the purpose of controlling the integral lifting of the lifting frame 2 is achieved, and the submergence degree of the floater 6 in the beaker 7 is adjusted, when the liquid to be measured just submerges the floater 6, the reading on the electronic scale 3 is recorded, and the density of the liquid is calculated according to the Archimedes principle, F floating = rho liquid gV row.

It should be noted that, in this document, relational terms such as first and second, and the like are only used for distinguishing one entity or operation from another entity or operation, and do not necessarily require or imply any actual relation or order between the entities or operations, and furthermore, the terms "comprise", or any other variation thereof are intended to cover a non-exclusive inclusion, so that a process, a method, an article, or an apparatus including a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A liquid density real-time measuring device based on a lever principle and an electronic scale comprises a lever frame (1), it is characterized in that a lifting frame (2) is arranged below one end of the lever frame (1), an electronic scale (3) is arranged below the other end of the lever frame (1), lever arms (4) are arranged on the electronic scale (3) and the lifting frame (2) and positioned on the front surface of the lever frame (1), the lower end of the lever arm (4) is provided with a hook (8), the upper surface of the lifting frame (2) is provided with a beaker (7), a floater (6) is arranged inside the beaker (7), a counterweight bottle (5) is arranged above the electronic scale (3), adjusting screw rods (101) are installed at two ends of the lever frame (1), and balance weight nuts (102) are installed on the outer sides of the adjusting screw rods (101).

2. The device for measuring the liquid density in real time based on the lever principle and the electronic scale is characterized in that a base (203) is arranged below the lifting frame (2), a scissor type support (202) is connected between the base (203) and the lifting frame (2), a support sliding groove (204) is formed in the outer side of the base (203) at one end of the scissor type support (202), a lifting screw rod (201) is installed on the lower surface of the lifting frame (2), and a crank (205) is installed at one end of the lifting screw rod (201).

3. A device for real-time measurement of liquid density based on the lever principle and electronic scale according to claim 1, characterized in that said weight nut (102) is engaged with said adjusting screw (101) and rotatably connected thereto, and both said lever arms (4) are rotatably connected to said lever frame (1).

4. A device for real-time measurement of liquid density based on the lever principle and electronic scale according to claim 1, characterized in that said beaker (7) is a transparent glass material, and said counter-weight bottle (5) and said float (6) are both located on a plastic material.

5. The device for measuring the liquid density in real time based on the lever principle and the electronic scale as claimed in claim 2, wherein a slider is installed at the outer side of one end of the scissor-type stand (202) inside the stand sliding groove (204), and the other end of the scissor-type stand (202) is rotatably connected with the base (203) through a rotating shaft.

6. The device for measuring the density of liquid in real time based on the lever principle and the electronic scale as claimed in claim 2, wherein the lifting screw rod (201) is engaged with the lifting frame (2) to rotate.

7. The device for real-time measurement of liquid density based on lever principle and electronic scale as claimed in claim 1, wherein said counter weight bottle (5) and said float (6) are connected to said hook (8) by means of strings of equal length.

8. The device for measuring the density of a liquid in real time based on the lever principle and the electronic scale as claimed in claim 1, wherein the adjusting screw rod (101) is fixedly connected with the lever frame (1) in an engaged manner.