阅读说明：本技术 一种带放大机构的液位面测量装置 (Liquid level measuring device with amplifying mechanism ) 是由 孙立国 杜成斌 江守燕 陈玉泉 于 2020-06-12 设计创作，主要内容包括：本发明公开了一种带放大机构的液位面测量装置,包括储液仓,所述储液仓的顶面通过管道与待测液罐的顶面连通,所述储液仓的底面与待测液罐的底面连通；所述待测液罐的顶面设有进液口,底面设有出液口；所述储液仓内设有浮块,所述浮块漂浮于储液仓内溶液表面；所述浮块上方连接有菱形连杆机构,所述菱形连杆机构上方设有位移传感器；所述菱形连杆机构用于对浮块向上/向下的位移进行放大,所述位移传感器用于检测菱形连杆机构放大后的位移数据。本发明通过设置菱形连杆机构提高了液位面小位移的测量精度,提高了液位面测量装置的灵敏度。(The invention discloses a liquid level measuring device with an amplifying mechanism, which comprises a liquid storage bin, wherein the top surface of the liquid storage bin is communicated with the top surface of a liquid tank to be measured through a pipeline, and the bottom surface of the liquid storage bin is communicated with the bottom surface of the liquid tank to be measured; a liquid inlet is formed in the top surface of the liquid tank to be detected, and a liquid outlet is formed in the bottom surface of the liquid tank to be detected; a floating block is arranged in the liquid storage bin and floats on the surface of the solution in the liquid storage bin; a rhombic connecting rod mechanism is connected above the floating block, and a displacement sensor is arranged above the rhombic connecting rod mechanism; the diamond-shaped link mechanism is used for amplifying upward/downward displacement of the floating block, and the displacement sensor is used for detecting displacement data amplified by the diamond-shaped link mechanism. The invention improves the measurement precision of the small displacement of the liquid level surface by arranging the rhombic connecting rod mechanism and improves the sensitivity of the liquid level surface measuring device.)

1. A liquid level measuring device with an amplifying mechanism is characterized by comprising a liquid storage bin, wherein the top surface of the liquid storage bin is communicated with the top surface of a liquid tank to be measured through a pipeline, and the bottom surface of the liquid storage bin is communicated with the bottom surface of the liquid tank to be measured; a liquid inlet is formed in the top surface of the liquid tank to be detected, and a liquid outlet is formed in the bottom surface of the liquid tank to be detected; a floating block is arranged in the liquid storage bin and floats on the surface of the solution in the liquid storage bin; a rhombic connecting rod mechanism is connected above the floating block, and a displacement sensor is arranged above the rhombic connecting rod mechanism; the diamond-shaped link mechanism is used for amplifying upward/downward displacement of the floating block, and the displacement sensor is used for detecting displacement data amplified by the diamond-shaped link mechanism.

2. The liquid level surface measuring device with the amplifying mechanism as claimed in claim 1, wherein the rhombic connecting rod mechanism comprises a distance measuring plate, a top hinged member, a plurality of X-shaped hinged members, a fixed shaft and a bottom hinged member in sequence from top to bottom;

the bottom surface of the distance measuring plate is connected with the top hinged piece through a bracket;

the top articulated piece is an inverted V-shaped articulated piece, the top end of the top articulated piece is articulated through a pin shaft, and the bottom end of the top articulated piece is articulated with the top end of the adjacent X-shaped articulated piece through a pin shaft;

the top end and the bottom end of the adjacent X-shaped hinge parts are hinged through a pin shaft;

the bottom articulated piece is a V-shaped articulated piece, the bottom end of the bottom articulated piece is articulated with the top surface of the floating block through a pin shaft, and the top end of the bottom articulated piece is articulated with the bottom end of the adjacent X-shaped articulated piece through a pin shaft; and in the plurality of X-shaped hinged pieces, the central point of the X-shaped hinged piece at the bottommost part is hinged through the fixed shaft, and two ends of the fixed shaft are fixedly connected with the side wall of the liquid storage bin.

3. The liquid level measuring device with the amplifying mechanism as claimed in claim 2, wherein the top hinge is provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are at the same horizontal height;

the bracket comprises a connecting rod and a mounting rod, the mounting rod is a cross rod, a third mounting hole and a hole groove are formed in the mounting rod, and the slotting direction of the hole groove is the horizontal direction; the third mounting hole is matched with the first mounting hole, and the inner diameter of the hole groove is matched with the second mounting hole; the first mounting hole is hinged with the third mounting hole through a first pin; the second mounting hole is movably connected with the hole groove through a second pin, and the second pin slides left and right in the hole groove along the horizontal direction; the connecting rod is the montant, the both ends of connecting rod are connected with range finding board, installation pole respectively.

4. The liquid level surface measuring device with the amplifying mechanism as claimed in claim 2, wherein a mounting seat is arranged at the center of the top surface of the floating block, and a pin shaft at the bottom end of the bottom hinged member is mounted on the mounting seat.

5. The liquid level surface measuring device with the amplifying mechanism as claimed in claim 4, wherein the cross section of the mounting seat is U-shaped.

6. The liquid level surface measuring device with the amplifying mechanism as claimed in claim 2, wherein the opening and closing angle of the X-shaped hinge is 5-180 °.

7. The liquid level surface measuring device with the amplifying mechanism as claimed in claim 1, wherein the diamond-shaped link mechanism is made of light material.

8. The liquid level surface measuring device with an amplifying mechanism according to claim 1, wherein the displacement sensor is a laser displacement sensor.

Technical Field

The invention belongs to the technical field of displacement measurement, and particularly relates to a liquid level surface measuring device with an amplifying mechanism.

Background

For the research of the liquid level measuring sensor, the foreign start is earlier, and the research work is relatively mature. The research on the liquid level measuring sensor in China is far behind that of other developed countries, the automation degree of the measuring system is not high, and the precision reliability and other aspects have great gaps with foreign technologies. However, in recent years, with the rapid development of the economic and technical levels of China, the state gradually pays attention to the research of the liquid level measuring sensor, and the liquid level measuring technology is comprehensively developed and updated.

The common liquid level measuring technology is a measuring method for measuring the liquid level of liquid by a pressure sensor, such as a static pressure type liquid level measuring method by adopting a diffused silicon pressure sensor, and has the advantages of good stability, high reliability and long service life. The instrument in the static pressure type liquid level measuring method has relatively simple structure and design, convenient device and easy application.

However, the pressure sensor usually needs to be installed in a sealing mode, the requirement on the sealing performance is high, and the installation position also has certain requirements.

Conventional displacement sensors generally do not have the capability of amplifying small displacements, and the measurement of the small displacements may cause inaccuracy of displacement measurement due to insufficient sensitivity.

Disclosure of Invention

The invention aims to provide a liquid level surface measuring device with an amplifying mechanism, which solves the problem that the measurement sensitivity of the traditional displacement sensor to small displacement is not enough to cause inaccuracy of displacement measurement.

In order to achieve the purpose, the invention adopts the technical scheme that:

a liquid level measuring device with an amplifying mechanism comprises a liquid storage bin, wherein the top surface of the liquid storage bin is communicated with the top surface of a liquid tank to be measured through a pipeline, and the bottom surface of the liquid storage bin is communicated with the bottom surface of the liquid tank to be measured; a liquid inlet is formed in the top surface of the liquid tank to be detected, and a liquid outlet is formed in the bottom surface of the liquid tank to be detected; a floating block is arranged in the liquid storage bin and floats on the surface of the solution in the liquid storage bin; a rhombic connecting rod mechanism is connected above the floating block, and a displacement sensor is arranged above the rhombic connecting rod mechanism; the diamond-shaped link mechanism is used for amplifying upward/downward displacement of the floating block, and the displacement sensor is used for detecting displacement data amplified by the diamond-shaped link mechanism.

Specifically, the rhombic connecting rod mechanism sequentially comprises a distance measuring plate, a top articulated piece, a plurality of X-shaped articulated pieces, a fixed shaft and a bottom articulated piece from top to bottom;

the bottom surface of the distance measuring plate is connected with the top hinged piece through a bracket;

the top articulated piece is an inverted V-shaped articulated piece, the top end of the top articulated piece is articulated through a pin shaft, and the bottom end of the top articulated piece is articulated with the top end of the adjacent X-shaped articulated piece through a pin shaft;

the top end and the bottom end of the adjacent X-shaped hinge parts are hinged through a pin shaft;

the bottom articulated piece is a V-shaped articulated piece, the bottom end of the bottom articulated piece is articulated with the top surface of the floating block through a pin shaft, and the top end of the bottom articulated piece is articulated with the bottom end of the adjacent X-shaped articulated piece through a pin shaft; and in the plurality of X-shaped hinged pieces, the central point of the X-shaped hinged piece at the bottommost part is hinged through the fixed shaft, and two ends of the fixed shaft are fixedly connected with the side wall of the liquid storage bin.

Specifically, in the present invention, the top hinge, the plurality of X-shaped hinges and the bottom hinge constitute a plurality of diamond structures, and the number of diamond structures is 1 more than the number of X-shaped hinges.

Specifically, a first mounting hole and a second mounting hole are formed in the top hinged piece, and the first mounting hole and the second mounting hole are located at the same horizontal height;

the bracket comprises a connecting rod and a mounting rod, the mounting rod is a cross rod, a third mounting hole and a hole groove are formed in the mounting rod, and the slotting direction of the hole groove is the horizontal direction; the third mounting hole is matched with the first mounting hole, and the inner diameter of the hole groove is matched with the second mounting hole; the first mounting hole is hinged with the third mounting hole through a first pin; the second mounting hole is movably connected with the hole groove through a second pin, and the second pin slides left and right in the hole groove along the horizontal direction; the connecting rod is the montant, the both ends of connecting rod are connected with range finding board, installation pole respectively. According to the invention, the distance measuring plate is arranged on the top hinged member through the bracket, so that the distance measuring plate can be always kept in a horizontal state in the telescopic process of the diamond-shaped connecting rod mechanism, and the stability of the measuring device is improved.

Specifically, the center of the top surface of the floating block is provided with an installation seat, and a pin shaft at the bottom end of the bottom hinged part is installed on the installation seat; the cross section of the mounting seat is U-shaped.

Specifically, the opening and closing angle of the X-shaped hinge is 5-180 degrees.

In the invention, when the liquid level in the liquid tank to be measured descends, the liquid storage bin and the liquid tank to be measured form a communicating vessel, the liquid level in the liquid storage bin also descends along with the descending of the liquid level, the floating block in the liquid storage bin also descends along with the liquid level, and the central point of the X-shaped hinge at the bottommost part is restrained by the fixed shaft, so that the diamond structure at the bottommost part is vertically elongated, the shape change of the diamond structure at the bottommost part causes the shape change of a plurality of diamond structures at the upper part of the diamond structure, thereby achieving the effect of stroke amplification, and when the opening and closing angle of the X-shaped hinge is 5 degrees, the lower limit of the liquid level to; on the contrary, when the liquid level surface rises, the rhomboid structure is gradually compressed vertically, and when the opening and closing angle of the X-shaped hinge is changed to 180 degrees, the upper limit of the measured liquid level surface is reached.

Specifically, the rhombic connecting rod mechanisms are made of light materials, so that the influence of the self weight of the rhombic connecting rod mechanisms on the telescopic performance of the rhombic connecting rod mechanisms is reduced.

Specifically, the displacement sensor is a laser displacement sensor.

Compared with the prior art, the invention has the beneficial effects that: (1) aiming at the problems of low accuracy, low sensitivity and inaccurate small displacement measurement of the traditional liquid level meter, the invention converts the change of the liquid level surface into the displacement change of the top end of the diamond-shaped connecting rod mechanism by arranging the diamond-shaped connecting rod mechanism, and amplifies the displacement of the liquid level surface by multiple times, thereby improving the measurement accuracy of the small displacement of the liquid level surface and improving the sensitivity of the liquid level surface measuring device; (2) the measuring device has low installation requirement, is convenient and fast to operate, has no requirement on the diameter of the liquid tank to be measured, is still suitable for the situation that the traditional liquid level meter cannot be installed for measuring the liquid level, and has strong applicability.

Drawings

FIG. 1 is a schematic view of an installation structure of a liquid level measuring device with an amplifying mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a side sectional view of a liquid level surface measuring device with an amplifying mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic front view of the diamond-shaped magnifying mechanism in a contracted state according to an embodiment of the present invention;

FIG. 4 is a schematic front view of the diamond-shaped enlarged mechanism in an extended state according to the embodiment of the present invention;

FIG. 5 is a schematic view of an installation structure of a distance measuring board according to an embodiment of the present invention;

FIG. 6 is a schematic view of a top hinge according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a bracket and a distance measuring board according to an embodiment of the present invention;

in the figure: 1. a liquid storage bin; 2. a pipeline; 3. a liquid tank to be tested; 4. a liquid inlet; 5. a liquid outlet; 6. floating blocks; 7. a diamond-shaped link mechanism; 8. a displacement sensor; 9. a distance measuring plate; 10. a top hinge; 11. an X-shaped hinge; 12. a fixed shaft; 13. a bottom hinge; 14. a support; 15. a pin shaft; 16. a first mounting hole; 17. a second mounting hole; 18. a connecting rod; 19. mounting a rod; 20. a third mounting hole; 21. a hole groove; 22. a first pin; 23. a second pin; 24. and (7) mounting a seat.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the present embodiment provides a liquid level measuring device with an amplifying mechanism, which includes a liquid storage bin 1, wherein a top surface of the liquid storage bin 1 is communicated with a top surface of a liquid tank 3 to be measured through a pipeline 2, and a bottom surface of the liquid storage bin 1 is communicated with a bottom surface of the liquid tank 3 to be measured; a liquid inlet 4 is formed in the top surface of the liquid tank 3 to be detected, and a liquid outlet 5 is formed in the bottom surface of the liquid tank; a floating block 6 is arranged in the liquid storage bin 1, and the floating block 6 floats on the surface of the solution in the liquid storage bin 1; a rhombic connecting rod mechanism 7 is connected above the floating block 6, and a displacement sensor 8 is arranged above the rhombic connecting rod mechanism 7; the rhombic connecting rod mechanism 7 is used for amplifying the upward/downward displacement of the floating block 6, and the displacement sensor 8 is used for detecting the displacement data of the rhombic connecting rod mechanism 7 after amplification.

Specifically, as shown in fig. 3 and 4, the rhombic link mechanism 7 sequentially comprises a ranging plate 9, a top hinge 10, 3X-shaped hinge 11, a fixed shaft 12 and a bottom hinge 13 from top to bottom; the number of the X-shaped hinges 11 is determined according to actual requirements, and the larger the number of the X-shaped hinges 11 is, the larger the magnification is.

The bottom surface of the distance measuring plate 9 is connected with the top hinged piece 10 through a bracket 14;

the top hinged part 10 is an inverted V-shaped hinged part, the top end of the top hinged part 10 is hinged through a pin shaft 15, and the bottom end of the top hinged part 10 is hinged with the top end of the adjacent X-shaped hinged part 11 through the pin shaft 15;

the top end and the bottom end of the adjacent X-shaped hinge parts 11 are hinged through a pin shaft 15;

the bottom hinged piece 13 is a V-shaped hinged piece, the bottom end of the bottom hinged piece 13 is hinged with the top surface of the floating block 6 through a pin shaft 15, and the top end of the bottom hinged piece 13 is hinged with the bottom end of the adjacent X-shaped hinged piece 11 through the pin shaft 15; 3 of X-shaped articulated elements 11, the central point of the X-shaped articulated element 11 at the bottommost passes through fixed axle 12 is articulated, the both ends of fixed axle 12 and the lateral wall fixed connection of stock solution storehouse 1.

Specifically, in the present embodiment, the top hinge 10, the 3X-shaped hinges 11 and the bottom hinge 13 form 4 diamond structures.

Specifically, as shown in fig. 5 to 7, a first mounting hole 16 and a second mounting hole 17 are provided on the top hinge 10, and the first mounting hole 16 and the second mounting hole 17 are located at the same horizontal height;

the support 14 comprises a connecting rod 18 and a mounting rod 19, the mounting rod 19 is a cross rod, a third mounting hole 20 and a hole groove 21 are formed in the mounting rod 19, and the slotting direction of the hole groove 21 is the horizontal direction; the third mounting hole 20 is matched with the first mounting hole 16, and the inner diameter of the hole groove 21 is matched with the second mounting hole 17; the first mounting hole 16 is hinged with the third mounting hole 20 through a first pin 22; the second mounting hole 17 is movably connected with the hole groove 21 through a second pin 23, and the second pin 23 slides left and right in the hole groove 21 along the horizontal direction; the connecting rod 18 is a vertical rod, and two ends of the connecting rod 18 are respectively connected with the distance measuring plate 9 and the mounting rod 19.

In this embodiment, when the diamond-shaped linkage 7 is contracted to the limit, the top hinge 10 resembles a horizontal straight line, and at this time, the first mounting hole 16 is farthest away from the second mounting hole 17, and the second pin 23 is located at the rightmost end of the hole slot 21; when the diamond-shaped linkage mechanism 7 extends to the limit, the opening angle of the top hinge 10 is about 5 degrees, at this time, the distance from the first mounting hole 16 to the second mounting hole 17 is the nearest, and the second pin 23 is at the leftmost end of the hole slot 21; this embodiment is passed through support 14 and is installed range finding board 9 on top articulated elements 10, can guarantee that range finding board 9 is in the horizontality all the time, avoids range finding board 9 slope to lead to measured data inaccurate, has improved measuring device's stability.

Specifically, the center of the top surface of the floating block 6 is provided with an installation seat 24, and a pin shaft 15 at the bottom end of the bottom hinged part 13 is installed on the installation seat 24; the mounting seat 24 is U-shaped in cross section.

Specifically, the opening and closing angle of the X-shaped hinge 11 is 5 ° to 180 °.

In this embodiment, when the liquid level in the liquid tank 3 to be measured falls, since the liquid storage bin 1 and the liquid tank 3 to be measured form a communicating vessel, the liquid level in the liquid storage bin 1 also falls along with the fall, the floating block 6 in the liquid storage bin 1 also falls along with the liquid level, and since the central point of the X-shaped hinge 11 at the bottommost is restrained by the fixed shaft 12, the diamond structure at the bottommost is elongated vertically, the shape change of the diamond structure at the bottommost causes the shape change of the 3 diamond structures at the upper part thereof, thereby achieving the effect of stroke amplification, and when the opening and closing angle of the X-shaped hinge 11 becomes 5 degrees, the lower limit of the liquid level to be measured is reached; on the contrary, when the level rises, the rhomboid is gradually compressed vertically, and when the opening and closing angle of the X-shaped hinge 11 becomes 180 degrees, it is the upper limit of the measured level.

Specifically, the rhombic connecting rod mechanisms 7 are made of light materials, so that the influence of the self weight of the rhombic connecting rod mechanisms 7 on the telescopic performance of the rhombic connecting rod mechanisms is reduced.

Specifically, the displacement sensor 8 is a laser displacement sensor.

In this embodiment, all the hinged parts can adopt a ball bearing sleeve structure, that is, the ball bearing sleeve is sleeved on the outer periphery of the pin 15 or the fixed shaft 12 and lubricated to reduce friction to the maximum extent and reduce measurement errors.

The working principle of the measuring device of the embodiment is as follows: when the liquid level changes, the liquid level in the liquid storage bin 1 is consistent with the liquid level of the liquid tank 3 to be measured (the atmospheric pressure in the liquid storage bin 1 is consistent with the atmospheric pressure in the liquid tank 3 to be measured) because the liquid storage bin 1 and the liquid tank 3 to be measured form a communicating vessel (the bottom surface of the liquid storage bin 1 is communicated with the bottom surface of the liquid tank 3 to be measured, and the top surface of the liquid storage bin 1 is communicated with the top surface of the liquid tank 3 to be measured); the liquid level in the liquid storage bin 1 synchronously changes along with the liquid level in the liquid tank 3 to be measured; the height of the floating block 6 in the liquid storage bin 1 rises and falls along with the rise and fall of the liquid level; because the central point of the X-shaped hinge 11 at the bottommost part is hinged through the fixing shaft 12, and the two ends of the fixing shaft 12 are fixed on the side wall of the liquid storage bin 1, in the ascending/descending process of the floating block 6, the diamond structure at the bottommost part can be stretched or compressed, so that the whole diamond link mechanism 7 is driven to extend/shorten, the distance measuring plate 9 at the top of the diamond link mechanism 7 is driven to move upwards/downwards, the displacement of the distance measuring plate 9 is 6 times of the displacement of the height of the liquid level, namely the amplification factor is 2 times of the number of the X-shaped hinge 11; and finally, detecting the displacement of the distance measuring plate 9 through a laser displacement sensor 8, and dividing the measured displacement by 6 to obtain the actual displacement of the liquid level surface.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that 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.