Ellipsoidal bottom volume calibration method

Abstract

The invention discloses a method for calibrating the volume of an ellipsoid bottom. The method comprises the following steps: installing a test blanking cap to the ellipsoid bottom; turning over the ellipsoid bottom; supporting the ellipsoid bottom by using a supporting ring; the PVC transparent hard tube is connected with the test blanking cap through the PVC hose; placing an I-shaped ruler at the large end of the fork-shaped ring at the ellipsoid bottom; the steel plate ruler is used for assisting in measuring the distance between the I-shaped ruler and the PVC transparent hard tube for measuring the liquid level; connecting a filling hose with the test blanking cap; the digital display flowmeter is connected with the filling hose; and after a theoretical design value is filled, the height between the liquid level in the PVC transparent hard tube and the I-shaped ruler is measured. The theoretical volume liquid level is moved to the outside of the box bottom through the PVC transparent pipe according to the communicating vessel principle, the relative height of the liquid level in the pipe and the I-shaped ruler is measured, and therefore the theoretical installation position of a sensor signaling point is accurately measured, the box bottom volume liquid level is simply and rapidly measured, and the problems that a traditional method is large in operation difficulty and large in measurement error are solved. And the measurement convenience and accuracy are improved.

Description

Technical Field

[0001] The patent of this invention involves the aerospace pressure vessel industry, and in particular, the field of tank bottom sensor position calibration. Background Art

[0002] According to the technical requirements of the tank design, in order to provide more accurate information on the position of the rocket fuel, higher and higher requirements are placed on the installation accuracy of the liquid level sensor. During the production process of the tank bottom, there is a certain deviation between the actual surface structure and the theoretical surface, so the sensor bracket cannot be welded according to the designed theoretical value. Therefore, the theoretical remaining liquid level volume value is often given, and the position of the theoretical signal point of the sensor is determined by conversion. At present, the liquid level height and the position of the sensor signal point are determined by direct measurement using an I-beam ruler and a steel ruler. During the operation, there are problems such as large measurement errors and high difficulty in operation.

[0003] For example, a 5M-level tank volume calibration equipment invented by Meng Fanxin and others can realize volume calibration under the whole tank state, but the measurement method under the single bottom state still needs further improvement. Summary of the invention

[0004] The purpose of the present invention is to quickly and accurately realize the volume calibration measurement of the sensor sending point position in the single bottom state of the box bottom, and propose a measurement method. In order to solve the above technical problems, the present invention provides a method for ellipsoid bottom volume calibration.

[0005] A method for calibrating the volume of an ellipsoid base comprises the following steps:

[0006] S1: Install the test plug cover to the bottom of the ellipsoid;

[0007] S2: flip the ellipsoid base assembly over;

[0008] S3: Use a support ring to support the ellipsoid base;

[0009] S4: The PVC transparent hard tube is connected to the test plug cap through a PVC hose to move the liquid level to a measurable position;

[0010] S5: Use an I-square to place the large end of the fork ring on the bottom of the ellipsoid to convert the reference of the bottom of the box to be measured to the position to be measured;

[0011] S6: Use a steel ruler to assist in measuring the distance between the I-ruler and the PVC transparent hard tube to measure the liquid level;

[0012] S7: Connect the filling hose to the test plug cap;

[0013] S8: The digital flow meter is connected to the filling hose to count the volume of the test medium filled;

[0014] S9: Set the test medium filling volume of the filling system according to the design value and start filling the system;

[0015] S10: After filling is completed, measure the height between the liquid level in the PVC transparent hard tube and the I-ruler. This height is the position of the sensor's signal sending point.

[0016] As a preferred embodiment, the support ring in S3 is connected to the support base to stabilize the position of the ellipsoid base during the volume calibration process.

[0017] As a preferred embodiment, the PVC transparent hard tube in S4 is provided with a scale for accurately measuring the liquid level height.

[0018] Beneficial effects of the present invention:

[0019] The present invention adopts the principle of communicating vessels, moves the theoretical volume liquid level to the outside of the box bottom through a PVC transparent tube, measures the relative height between the liquid level in the tube and the I-ruler, determines the position of the sensor sending point, and thus accurately measures the theoretical installation position of the sensor. The present invention can realize simple and fast box bottom volume liquid level measurement, solves the problems of difficult operation and large measurement error of traditional methods, and improves the convenience and accuracy of measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 Schematic diagram of the process of ellipsoid base volume calibration;

[0021] Attached Figure 2 The working principle diagram of ellipsoid bottom volume calibration;

[0022] Attached Figure 3 Schematic diagram of the measurement location.

[0023] In the figure, 1 is an I-ruler, 2 is a PVC transparent hard tube, 3 is a steel ruler, 4 is a PVC hose, 5 is an ellipsoid bottom, 6 is a support ring, 7 is a test plugging cover, 8 is a filling hose, 9 is a digital flow meter, and 10 is a support base. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the embodiments of the present invention are given below, and the present invention is described in detail through the embodiments. It is necessary to point out that the embodiments are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art in this field can make some non-essential improvements and adjustments based on the content of the present invention.

[0025] Embodiment:

[0026] like Figures 1 to 3 As shown, a method for calibrating the volume of an ellipsoid base comprises the following steps:

[0027] S1: Install the test plug cover (7) to the ellipsoid bottom (5);

[0028] S2: Turning over the ellipsoidal base (5) by a special lifting device;

[0029] S3: The ellipsoid base (5) is supported by a support ring (6), wherein the support ring (6) is connected to a support base (10) to stabilize the position of the ellipsoid base (5) during the volume calibration process;

[0030] S4: The PVC transparent rigid tube (2) is connected to the test plug cover (7) through the PVC hose (4) to move the liquid level to a measurable position; the PVC transparent rigid tube (2) is provided with a scale for measuring the liquid level height;

[0031] S5: Use an I-ruler (1) to be placed on the large end of the fork ring of the ellipsoid bottom (5) to convert the reference of the bottom of the box to be measured to the position to be measured;

[0032] S6: Use a steel ruler (3) to assist in measuring the distance between the I-ruler (1) and the PVC transparent hard tube (2) to measure the liquid level;

[0033] S7: Connect the filling hose (8) to the test plug cap (7);

[0034] S8: A digital flow meter (9) is connected to the filling hose (8) and is used to count the volume of the test medium filled;

[0035] S9: Set the test medium filling volume of the filling system according to the design value and start filling the system;

[0036] S10: After the filling is completed, the height between the liquid level in the PVC transparent hard tube (2) and the I-ruler (1) is measured. This height is the position of the sensor's signal transmission point.

[0037] It should be noted that the embodiments described are intended to help readers understand the principles of the present invention, and it should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. A person skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical inspiration disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A method for calibrating the volume of an ellipsoid base, characterized in that: The steps include: S1: Install the test plug cover to the bottom of the ellipsoid; S2: flip the ellipsoid base; S3: Use a support ring to support the ellipsoid base; S4: The PVC transparent hard tube is connected to the test plug cap through a PVC hose to move the liquid level to a measurable position; S5: Use an I-square to place the large end of the fork ring on the bottom of the ellipsoid to convert the reference of the bottom of the box to be measured to the position to be measured; S6: Use a steel ruler to assist in measuring the distance between the I-ruler and the PVC transparent hard tube to measure the liquid level; S7: Connect the filling hose to the test plug cap; S8: The digital flow meter is connected to the filling hose to count the volume of the test medium filled; S9: Set the test medium filling volume of the filling system according to the design value and start filling the system; S10: After filling is completed, measure the height between the liquid level in the PVC transparent hard tube and the I-ruler. This height is the position of the sensor's signal sending point.

2. The method for calibrating the volume of an ellipsoid base according to claim 1, characterized in that: The support ring in S3 is connected to the support base.

3. The method for calibrating the volume of an ellipsoid base according to claim 1, characterized in that: The PVC transparent hard tube in the S4 has scales on it.

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