Water communication type height difference measuring instrument

Abstract

The utility model discloses a water communication type height difference measuring instrument, and relates to the technical field of forklift limiting devices. Comprising a water communication cylinder, a transparent hose, a magnetic gauge stand, an adjustable connecting rod and a pointed-end spiral micrometer head, the water communication cylinder and the magnetic gauge stand are simultaneously placed on the surface of a measured object, one end of the adjustable connecting rod is connected with the magnetic gauge stand, and the other end is detachably connected with the pointed-end spiral micrometer head through the chuck. A mouthpiece is arranged on the side wall of the bottom of the water communicating cylinder, and is connected with a transparent hose; the pointed-end spiral micrometer head is located above the water communication cylinder and extends into the water communication cylinder. According to the water communication principle and the liquid capillarity, the water communication cylinder is processed by utilizing leftover bits and pieces on a construction site, so that the measuring precision of a high-precision level gauge can be achieved, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of height difference measurement, in particular to a water-connected height difference measuring instrument. Background Art

[0002] During the installation of large-scale generator sets such as steam turbine generator sets and gas turbine generator sets, it is necessary to precisely measure and strictly control the height difference between the foundation plate / embedded plate. The commonly used measuring instrument is a high-precision level. Its main disadvantages are: First, the purchase cost of the high-precision level is high, and there are relatively few scenarios for its use in unit installation, and the instrument cost-effectiveness is low; second, the measurement technology requirements are high, and the measurement personnel need to undergo professional measurement training; third, the measurement is inconvenient, and the instrument needs to be re-installed and adjusted for each measurement, which takes a long time and has many restrictions on the use environment; fourth, the high-precision level is a precision instrument with strict daily maintenance requirements. It must be sent to a professional testing agency for calibration every year, and the calibration fee is expensive; fifth, when the instrument fails, it is sometimes impossible to discover it in time and intuitively, and its inaccurate measurement will cause great difficulties to the subsequent installation work. At the same time, there are prominent problems such as the high cost of instrument repair and replacement.

[0003] Therefore, a water-connected height difference measuring instrument is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a water-connected height difference measuring instrument to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A water-connected height difference measuring instrument comprises a water connecting tube, a transparent hose, a magnetic base, an adjustable connecting rod and a pointed screw micrometer; the water connecting tube and the magnetic base are placed on the surface of the object to be measured at the same time, one end of the adjustable connecting rod is connected to the magnetic base, and the other end is detachably connected to the pointed screw micrometer through a chuck; a nozzle is provided on the bottom side wall of the water connecting tube, and a transparent hose is connected to the nozzle; the pointed screw micrometer is located above the water connecting tube and extends into the water connecting tube.

[0007] Furthermore, the water connecting cylinder comprises a cylinder body and a bottom plate fixedly connected to the cylinder body, and the bottom surface of the bottom plate has a surface roughness of 3.2 through fine turning.

[0008] Furthermore, the number of the nozzles is 2, and the angle between the two nozzles is 90 degrees or 180 degrees.

[0009] Furthermore, the number of the nozzles is 3, and the three nozzles are arranged in sequence at 90 degree intervals.

[0010] Furthermore, the water connecting tube is made of carbon steel or stainless steel.

[0011] Furthermore, the front end of the nozzle has a taper.

[0012] Furthermore, a top cover is provided on the top of the water connecting cylinder.

[0013] The utility model has the following beneficial effects:

[0014] The utility model uses the water connection principle and the liquid capillary phenomenon, utilizes the leftover materials on the construction site to process the water connection tube, which can not only achieve the measurement accuracy of the high-precision level instrument, but also has low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is the measurement principle diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of the chuck structure of the utility model;

[0018] Figure 4 This is a schematic diagram of a water connecting cylinder with two nozzles of the utility model;

[0019] Figure 5 This is a schematic diagram of a water connecting cylinder with two nozzles of the utility model;

[0020] Figure 6 This is a schematic diagram of a three-joint water connecting cylinder of the utility model;

[0021] Figure 7 This is a schematic diagram of Embodiment 1 of the present utility model.

[0022] Parts and numbers in the picture:

[0023] 1-water connecting tube; 2-transparent hose; 3-magnetic base; 4-adjustable connecting rod; 5-pointed screw micrometer; 6-chuck; 7-nozzle; 101-cylinder; 102-bottom plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Although the utility model has been described with reference to the preferred embodiments, various improvements can be made to it and the components thereof can be replaced with equivalents without departing from the scope of the utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0025] like Figure 1-4As shown, the water-connected height difference measuring instrument comprises a water connecting tube 1, a transparent hose 2, a magnetic base 3, an adjustable connecting rod 4 and a pointed screw micrometer 5; the water connecting tube 1 and the magnetic base 3 are placed on the surface of the object to be measured at the same time, one end of the adjustable connecting rod 4 is connected to the magnetic base 3, and the other end is detachably connected to the pointed screw micrometer 5 through a chuck 6; a nozzle 7 is provided on the bottom side wall of the water connecting tube 1, and a transparent hose 2 is connected to the nozzle 7; the pointed screw micrometer 5 is located above the water connecting tube 1 and extends into the water connecting tube 1.

[0026] like Figure 2 As shown, the principle of the water-connected height difference measuring instrument is as follows: the interconnected water connecting tubes 1 are placed on the surface of the measured object, and the liquid contained therein will form a constant liquid surface. Under the condition of keeping the height L between the base surface of the magnetic table base 3 of the measuring instrument and the pointed screw micrometer 5 unchanged, the surface height difference between the measured objects can be accurately measured;

[0027] During the measurement process, the measuring instrument uses the capillary phenomenon of liquid to achieve accurate measurement. During measurement, the pointed screw micrometer 5 is slowly rotated. When the tip of the measuring rod is instantly in contact with the liquid surface, the liquid will be adsorbed onto the tip of the measuring rod due to the capillary phenomenon of the liquid. At this position, the liquid surface will form a tiny "halo ring" with the tip of the measuring rod as the center. At this time, the reading of the pointed screw micrometer 5 is the measurement data.

[0028] In order to better implement the above solution, the water connecting cylinder 1 includes a cylinder body 101 and a bottom plate 102 fixedly connected to the cylinder body 101. The bottom surface of the bottom plate 102 has a surface roughness of 3.2 through fine turning.

[0029] In order to better implement the above scheme, the water connecting tube 1 is made of carbon steel or stainless steel, and is processed and manufactured using leftover materials from the construction site; in order to use it repeatedly in the future and reduce rust removal and maintenance work, stainless steel is preferred.

[0030] In order to better implement the above solution, the front end of the nozzle 7 has a taper to facilitate insertion into the transparent hose 2.

[0031] In order to better implement the above scheme, a cylinder cover is provided on the top of the water connecting cylinder 1. The cylinder cover is made of 3mm polytetrafluoroethylene. The outer diameter of the cylinder cover is 20 to 30mm larger than the outer diameter of the water connecting cylinder. It is used to cover the water connecting cylinder 1 to reduce the impact of wind on the liquid surface and the natural evaporation of the liquid on the liquid surface. The cylinder cover is opened during measurement and closed after the measurement is completed.

[0032] It should also be noted that all welding of the water connecting tube 1 is carried out by argon arc welding, the weld angle height is 4 to 5 mm, and the weld must be inspected by penetrant coloring to have no surface defects;

[0033] In order to ensure the tightness of the interface of the transparent hose 2 after it is inserted into the nozzle 7, a clamp or a thin wire can be used to clamp it when necessary to prevent leakage at the interface of the transparent hose 2, causing the liquid level to drop, thereby affecting the accuracy of the measurement;

[0034] The transparent hose 2 shall not be replaced by a non-transparent hose, because after the water-connected height difference measuring instrument is assembled, clean water is injected into it, and it is necessary to ensure that there is no stagnant air in the transparent hose 2. The use of the transparent hose 2 can timely detect whether there is stagnant air in the tube and exhaust the air in the tube, ensuring that the liquid level will not change during measurement, so as to ensure the accuracy of the measurement;

[0035] The pointed screw micrometer 5 adopts a 30° pointed outside micrometer product. The screw micrometer products sold on the market have a cylindrical measuring rod head and cannot be used for liquid level measurement. However, professional measuring tool manufacturers all produce 30° pointed outside micrometer products with an accuracy of 0.01mm, but they are generally not sold as separate products. When ordering, you only need to explain the situation to the manufacturer, and you can purchase the 30° pointed screw micrometer 5. There is no need to customize the pointed screw micrometer 5 from the measuring tool manufacturer, which will not incur a relatively high customization fee.

[0036] Embodiment 1

[0037] like Figure 4-7As shown, in this embodiment, the number of nozzles 7 on the water connecting tube 1 is 2, the angle between the two nozzles 7 is 90 degrees or 180 degrees, and the number of nozzles 7 is 3, and the three nozzles 7 are arranged in sequence at 90 degrees. The table of a separate device is used as a measurement and adjustment unit, such as a low-pressure cylinder table, a generator table, etc., a table is selected as a reference table, the water connecting tube 1 is placed in the middle position of the table in the measurement and adjustment unit, and a transparent hose 2 of a suitable length is cut according to the distance between adjacent water connecting tubes 1, and the transparent hose 2 is inserted into the nozzle 7. Clean water is slowly injected into the water connecting tube 1, and the final injection liquid level is maintained at about 4 / 5 of the height of the cylinder. Check whether the transparent hose 2 and its interface are Check for liquid leakage and whether there is stagnant air in the pipe, and promptly exhaust the air in the stagnant pipe. Finally, cover the water connecting tube 1 with a tube cover to reduce the impact of wind and natural evaporation of liquid on the liquid level. Install the pointed spiral micrometer 5 on the chuck 6 of the adjustable connecting rod 4 that has been adjusted and fixed. Rotate the spiral micrometer 5 flexibly without jamming, and rotate its measuring rod to the maximum range position. Place the magnetic base 3 on the table so that the measuring rod of the pointed spiral micrometer 5 is located in the middle of the liquid level in the water connecting tube 1, and then suck the magnetic base 3 tightly to the table. After the liquid level in the water connecting tube 1 is stable, rotate the measuring rod of the pointed spiral micrometer 5 so that the tip of the measuring rod gradually approaches the liquid surface, observe the changes in the liquid level, and continue to slowly rotate the spiral micrometer. When the tip of the measuring rod touches the liquid surface instantaneously, the liquid will be adsorbed onto the tip of the measuring rod due to the capillary phenomenon of the liquid. A tiny "halo ring" with the tip of the measuring rod as the center will be formed on the liquid surface at that location. At this moment, stop rotating the micrometer screw, read and record the measurement data, then rotate the micrometer screw in the opposite direction to make the tip of the measuring rod leave the liquid surface, then rotate the micrometer screw again to perform the second measurement. If the difference between the two measurement data is less than 0.03mm, the measurement is considered correct, and the tube cover is closed after the measurement.

[0038] In summary, the utility model uses the water connection principle and liquid capillary phenomenon, and utilizes the leftover materials on the construction site to process the water connection tube, which can not only achieve the measurement accuracy of a high-precision level instrument, but also has a low manufacturing cost.

[0039] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. Water-connected height difference measuring instrument, characterized in that: It comprises a water connecting tube (1), a transparent hose (2), a magnetic table base (3), an adjustable connecting rod (4) and a pointed screw micrometer (5); The water connecting tube (1) and the magnetic base (3) are placed on the surface of the object to be measured at the same time; one end of the adjustable connecting rod (4) is connected to the magnetic base (3), and the other end is detachably connected to the pointed screw micrometer (5) through a chuck (6); The bottom side wall of the water connecting tube (1) is provided with a nozzle (7), and the nozzle (7) is connected to a transparent hose (2); The pointed screw micrometer (5) is located above the water connecting tube (1) and extends into the water connecting tube (1).

2. The water-connected height difference measuring instrument according to claim 1, characterized in that: The water connecting cylinder (1) comprises a cylinder body (101) and a bottom plate (102) fixedly connected to the cylinder body (101); the bottom surface of the bottom plate (102) has a surface roughness of 3.2 after fine turning.

3. The water-connected height difference measuring instrument according to claim 1, characterized in that: The number of the nozzles (7) is 2, and the angle between the two nozzles (7) is 90 degrees or 180 degrees.

4. The water-connected height difference measuring instrument according to claim 1, characterized in that: The number of the nozzles (7) is 3, and the three nozzles (7) are arranged in sequence at 90-degree intervals.

5. The water-connected height difference measuring instrument according to any one of claims 1 to 4, characterized in that: The water connecting tube (1) is made of carbon steel or stainless steel.

6. The water-connected height difference measuring instrument according to any one of claims 1 to 4, characterized in that: The front end of the nozzle (7) has a taper.

7. The water-connected height difference measuring instrument according to any one of claims 1 to 4, characterized in that: The top of the water connecting cylinder (1) is provided with a top cover.

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