CN213932741U

CN213932741U - High-precision ultrasonic liquid level meter

Info

Publication number: CN213932741U
Application number: CN202022552079.2U
Authority: CN
Inventors: 陈雪中; 孙进; 高春甫; 孙顺远; 陈光远
Original assignee: Shenyang Jiahua Electric Appliance Co ltd
Current assignee: Shenyang Jiahua Electric Appliance Co ltd
Priority date: 2020-11-07
Filing date: 2020-11-07
Publication date: 2021-08-10
Anticipated expiration: 2030-11-07

Abstract

The invention relates to the technical field of liquid level meters and discloses a high-precision ultrasonic liquid level meter which comprises a top plate, wherein the top plate is a circular plate, a fixing plate is fixedly arranged below the top plate, the fixing plate is a circular plate, the area of the top plate is one-half and five times of that of the fixing plate, the fixing plate and the top plate are concentrically arranged, external threads are arranged at the excircle of the fixing plate, an ultrasonic liquid level measuring instrument is vertically arranged at the upper end of the top plate, and an ultrasonic wave emitting port is fixedly arranged at the lower end of the ultrasonic liquid level measuring instrument. According to the invention, the floating plate is added to enable the floating plate to freely slide up and down under the action of buoyancy at the excircle of the sliding rod through the sliding sleeve, the floating plate can replace a liquid level to measure, and the upper end surface of the floating plate is in a parallel state, so that the ultrasonic wave can be efficiently fed back through a normal reflection angle when in contact with the floating plate, and the phenomenon that the ultrasonic wave reflection angle changes and the measurement is inaccurate due to the fact that the ultrasonic wave is in contact with the liquid level with ripples when the liquid level is rippled is avoided.

Description

High-precision ultrasonic liquid level meter

Technical Field

The invention relates to the technical field of liquid level meters, in particular to a high-precision ultrasonic liquid level meter.

Background

The ultrasonic liquid level meter is a monitoring instrument for measuring the height of liquid, the height of a tank body and the position of materials. The instrument itself can adopt two-wire system, three-wire system or four-wire system technology, the two-wire system is: the power supply and the signal output are shared; the three-wire system is: the power supply loop and the signal output loop are independent, when direct current 24v is adopted for power supply, a 3-core cable can be used, and the power supply negative terminal and the signal output negative terminal share one core wire; the four-wire system is: when alternating current 220v power supply is adopted or when direct current 24v power supply is adopted and the power supply loop is required to be completely isolated from the signal output loop, a 4-core cable is used. The direct current or alternating current is used for power supply, and the high-low switching value output is 4-20 mADC.

When the existing ultrasonic liquid level meter in the market is used, because liquid is when receiving slight vibrations, the liquid level can appear water wave or ripple very easily, and water wave and ripple can lead to the angle of ultrasonic wave retro-reflection to change when water wave or ripple appear at the liquid level when measuring to influence the precision of measuring. To this end, we propose a high precision ultrasonic level gauge.

Disclosure of Invention

The invention mainly solves the technical problems in the prior art and provides a high-precision ultrasonic liquid level meter.

In order to achieve the purpose, the invention adopts the following technical scheme that the high-precision ultrasonic liquid level meter comprises a top plate, wherein the top plate is a circular plate, a fixing plate is fixedly arranged below the top plate, the fixing plate is the circular plate, the area of the top plate is one-half of the area of the fixing plate, the fixing plate and the top plate are concentrically arranged, external threads are arranged at the excircle of the fixing plate, an ultrasonic liquid level measuring instrument is vertically arranged at the upper end of the top plate, an ultrasonic emission port is fixedly arranged at the lower end of the ultrasonic liquid level measuring instrument, the ultrasonic emission port penetrates through the top plate and the fixing plate and extends to the lower end of the fixing plate, a sliding rod is vertically and downwards fixedly arranged at the middle position of the lower end of the fixing plate, the sliding rod is a cylindrical long rod, a limiting plate is fixedly arranged at the lower end of the sliding rod, the limiting plate is the circular plate, the diameter of the limiting plate is twice that of the sliding rod, and a sliding sleeve is slidably connected at the excircle of the sliding rod, the sliding sleeve is a circular sleeve.

Preferably, the outer circle of the sliding sleeve is fixedly provided with a floating plate in parallel, the floating plate is a rectangular plate made of foam, and the lower end of the floating plate is provided with a plurality of groups of buffer devices.

Preferably, buffer includes the side board, and the side board is the rectangular plate and every buffer of group includes two sets of side boards, the upper end of two sets of side boards and the lower terminal surface fixed connection who floats the board.

Preferably, two sets of the side board is close to each other and all vertically has seted up perpendicular groove in a side intermediate position, and perpendicular groove is the rectangular channel and erects the lower terminal surface of groove and side board and does not communicate, and the inside horizontal sliding connection in two sets of perpendicular grooves has the removal axle.

Preferably, the moving shaft is a cylindrical rod and can freely slide up and down in the two groups of vertical grooves, the outer circle of the moving shaft is sleeved with a foam wheel, and the foam wheel is a circular wheel made of foam.

Advantageous effects

The invention provides a high-precision ultrasonic liquid level meter. The method has the following beneficial effects:

(1) the high-precision ultrasonic level meter is characterized in that a top plate is connected to the upper end of a liquid bearing tank to be measured through a fixed plate in a threaded manner, a slide rod is connected with the whole bearing tank through threads at the excircle of the fixed plate in a plugged manner and is kept in a vertical state with the liquid level inside the bearing tank all the time through the threads at the excircle of the fixed plate, when the slide rod is plugged inside the bearing tank, liquid inside the bearing tank can push a floating plate upwards through buoyancy to enable the floating plate to float above the liquid level, an ultrasonic level measuring instrument downwards sends out ultrasonic waves through an ultrasonic wave sending port to enable the ultrasonic waves to be in contact with the floating plate and then returns to analyze the distance between the ultrasonic wave sending port and the floating plate, the effect of measuring the height of the liquid level is achieved, and the floating plate is added to enable the floating plate to freely slide up and down under the action of the buoyancy at the excircle of the slide rod through a sliding sleeve, the floating plate can replace the liquid level to measure and the up end that floats the board is parallel state for ultrasonic wave can feed back through normal reflection angle when floating the board contact by high efficiency, avoid the liquid level ultrasonic wave and the liquid level contact that has the ripple when the ripple appears to lead to ultrasonic wave reflection angle to change, the measuring inaccurate condition takes place.

(2) This high accuracy ultrasonic wave level gauge, when the board floats on the surface of water, ripple appears when the surface of water, and the water wave can strike on buffer, makes when ripple strikes on buffer through setting up removal axle and foam wheel, and the impact force of water wave can be applyed the foam wheel, makes the foam wheel can slide from top to bottom in the inside of erecting the groove through the impact of water wave to the foam wheel to make whole showy board be in parallel state all the time, guarantee measuring stability.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a detailed schematic view of the floating plate of the present invention;

FIG. 3 is a schematic view of a buffering device according to the present invention.

Illustration of the drawings:

1 top plate, 2 fixed plate, 3 ultrasonic liquid level measuring instrument, 4 ultrasonic transmitter, 5 slide bar, 6 limiting plate, 7 sliding sleeve, 8 floating plate, 9 buffer device, 10 side plate, 11 vertical groove, 12 moving shaft and 13 foam wheel.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example (b): a high-precision ultrasonic liquid level meter is shown in figures 1-3 and comprises a top plate 1, wherein the top plate 1 is a circular plate, a fixed plate 2 is fixedly arranged below the top plate 1, the fixed plate 2 is a circular plate, the area of the top plate 1 is one point five times of the area of the fixed plate 2, the fixed plate 2 and the top plate 1 are concentrically arranged, an external thread is arranged at the excircle of the fixed plate 2, an ultrasonic liquid level measuring instrument 3 is vertically arranged at the upper end of the top plate 1, an ultrasonic emission port 4 is fixedly arranged at the lower end of the ultrasonic liquid level measuring instrument 3, the ultrasonic emission port 4 penetrates through the top plate 1 and the fixed plate 2 and extends to the lower end of the fixed plate 2, a sliding rod 5 is vertically and downwardly fixedly arranged at the middle position of the lower end of the fixed plate 2, the sliding rod 5 is a cylindrical long rod, a limiting plate 6 is fixedly arranged at the lower end of the sliding rod 5, the limiting plate 6 is a circular plate, and the diameter of the limiting plate 6 is twice that of the sliding rod 5, sliding connection has sliding sleeve 7 in slide bar 5's excircle department sliding connection, and sliding sleeve 7 is circular cover, and the parallel fixed mounting in sliding sleeve 7's excircle department has floating plate 8, floats plate 8 and is foam's rectangular plate, and the lower extreme of floating plate 8 is provided with a plurality of buffer 9 of group.

Buffer 9 includes side board 10, side board 10 includes two sets of side boards 10 for rectangular plate and every buffer 9 of group, the upper end of two sets of side boards 10 and the lower terminal surface fixed connection who floats board 8, the equal vertical perpendicular groove 11 of having seted up of a side intermediate position that two sets of side boards 10 are close to each other, it is not communicated for rectangular channel and perpendicular groove 11 and side board 10's lower terminal surface to erect groove 11, two sets of inside horizontal sliding connection who erects groove 11 has removal axle 12, removal axle 12 is cylindrical pole and removal axle 12 can be in the free upper and lower slip in the inside of two sets of perpendicular grooves 11, the foam wheel 13 has been cup jointed to removal axle 12's excircle department, foam wheel 13 is the circular wheel of foam material.

The working principle of the invention is as follows:

when the ultrasonic liquid level measuring device is used, the top plate 1 is connected to the upper end of a liquid bearing tank to be measured through the fixed plate 2 in a threaded manner, the slide rod 5 is connected with the whole bearing tank through the thread at the excircle of the fixed plate 2, the slide rod 5 is always kept in a vertical state with the liquid level in the bearing tank through the thread at the excircle of the fixed plate 2, when the slide rod 5 is connected in the bearing tank, the liquid in the bearing tank can upwards push the floating plate 8 through buoyancy to enable the floating plate 8 to float on the liquid level, the ultrasonic liquid level measuring device 3 downwards sends out ultrasonic waves through the ultrasonic wave sending outlet 4 to enable the ultrasonic waves to be in contact with the floating plate 8 and then return to analyze the distance between the ultrasonic wave sending outlet 4 and the floating plate 8, the effect of measuring the liquid level is achieved, the floating plate 8 is added to enable the floating plate 8 to freely slide up and down under the effect of buoyancy at the excircle of the slide rod 5 through the sliding sleeve 7, float board 8 and can replace the liquid level to measure and float board 8's up end is parallel state for ultrasonic wave can feed back through normal reflection angle when floating board 8 contacts by high efficiency, avoid the liquid level ultrasonic wave and the liquid level contact that has the ripple when the ripple to lead to ultrasonic wave reflection angle to change, the measuring inaccurate condition takes place appears.

When 8 float boards float on the surface of water, the ripple appears when the surface of water, and the wave can strike on buffer 9, makes when the ripple strikes on buffer 9 through setting up removal axle 12 and foam wheel 13, and the impact force of wave can be exerted on foam wheel 13, makes foam wheel 13 can slide from top to bottom in the inside of perpendicular groove 11 through removal axle 12 to the impact of wave to foam wheel 13 to make whole float board 8 be in parallel state all the time, guarantee measured stability.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A high accuracy ultrasonic wave level gauge, includes roof (1), its characterized in that: the lower part of the top plate (1) is fixedly provided with a fixed plate (2), the upper end of the top plate (1) is vertically provided with an ultrasonic liquid level measuring instrument (3), the lower end of the ultrasonic liquid level measuring instrument (3) is fixedly provided with an ultrasonic hair outlet (4), the ultrasonic hair outlet (4) penetrates through the top plate (1) and the fixed plate (2) and extends to the lower end of the fixed plate (2), the lower end middle position of the fixed plate (2) is vertically and downwards fixedly provided with a sliding rod (5), the sliding rod (5) is a cylindrical long rod, the lower end of the sliding rod (5) is fixedly provided with a limiting plate (6), the limiting plate (6) is a circular plate, the diameter of the limiting plate (6) is twice that of the sliding rod (5), the excircle of the sliding rod (5) is slidably connected with a sliding sleeve (7), the sliding sleeve (7) is a circular sleeve, the excircle of the sliding sleeve (7) is parallelly and fixedly provided with a floating plate (8), the floating plate (8) is a rectangular plate made of foam materials, and a plurality of groups of buffer devices (9) are arranged at the lower end of the floating plate (8).

2. A high accuracy ultrasonic level gauge as defined in claim 1, wherein: the fixing plate (2) is a circular plate, the area of the top plate (1) is one to five times that of the fixing plate (2), the fixing plate (2) and the top plate (1) are arranged concentrically, and external threads are arranged on the outer circle of the fixing plate (2).

3. A high accuracy ultrasonic level gauge as defined in claim 1, wherein: buffer (9) include side board (10), and side board (10) are rectangular plate and every buffer (9) of group and include two sets of side boards (10), the upper end of two sets of side boards (10) and the lower terminal surface fixed connection who floats board (8).

4. A high accuracy ultrasonic level gauge as defined in claim 3, wherein: two sets of side board (10) are close to each other side intermediate position all vertically seted up perpendicular groove (11), erect groove (11) and erect the lower terminal surface nonconnection of groove (11) and side board (10) for the rectangular channel, and the inside horizontal sliding connection in two sets of perpendicular grooves (11) has removal axle (12).

5. A high accuracy ultrasonic level gauge as claimed in claim 4, wherein: the movable shaft (12) is a cylindrical rod, the movable shaft (12) can freely slide up and down in the two groups of vertical grooves (11), the outer circle of the movable shaft (12) is sleeved with the foam wheel (13), and the foam wheel (13) is a circular wheel made of foam.