CN210036531U - Device for measuring height difference of stress point between digital pressure gauge and standard device - Google Patents

Abstract

The utility model is used for measuring the height difference of the stress point between the digital pressure gauge and the standard device, and the measuring device comprises a flat height gauge, a leveling component, an analog-digital meter interface part, a digital meter blind hole length taking-out device and a measuring device; the flat plate height gauge comprises a flat plate (2), supports (3) symmetrically arranged on two sides below the flat plate (2) and height gauges (1) arranged on the upper surface of the flat plate (2). The utility model has the advantages that: the structure design is reasonable, the conception is novel, the operation is convenient and fast, and the measurement accuracy is high.

Description

Device for measuring height difference of stress point between digital pressure gauge and standard device

Technical Field

The utility model relates to a measuring device, concretely relates to a device that is used for measuring atress point height difference between digital pressure gauge and the etalon.

Background

The digital pressure gauge is widely used as a direct-reading pressure gauge, is mainly used in places with higher precision and is used for magnitude transmission at present, and the precision grades commonly used at present are 0.05 grade, 0.02 grade and 0.01 grade. At the present, the quantity is not very large, but the development of the pressure gauge is towards higher precision and higher stability, the application of the pressure gauge is more and more extensive in the future, in the verification process of the high-precision digital pressure gauge, the pressure difference caused by the horizontal height difference of a stress point between a standard instrument and a detected instrument (the digital pressure gauge) needs to be compensated, and the pressure difference is specified in the verification procedure of the digital pressure gauge. The digital pressure meter has the advantages that the higher the precision and the lower the measuring range, the higher the requirement on the measurement of the height difference is, so the accurate measurement of the height difference is very important in the verification work, and the device is developed to fill the blank that no special equipment exists in the verification of the digital pressure meter because no special equipment exists at present.

In the process of calibrating the high-precision digital pressure gauge by using the piston, the pressure difference caused by the horizontal height difference of the stress point between the standard instrument (piston) and the tested instrument (digital pressure gauge) needs to be compensated. The higher the accuracy, the lower the range of the digital meter, the higher the measurement requirement for the height difference, so the accurate measurement for the height difference is very important in the verification work. In practical work with piston certified digital meters, accurate height differential measurement is difficult, here in two steps. After the first measuring piston rod is installed in the piston, the difference value H between the position of the bottom stress point and the digital installation point₁. The measurement can be completed only by indirect measurement in the device, the accuracy is difficult to realize at different positions, and the stress point H in a blind hole of the digital meter to be detected is measured secondly₂This is also internal, because of the problems of structure and nature, it cannot be measured directly with depth gauges, and it is also an indirect measurement that the device solves the problem of this measurement.

Disclosure of Invention

The utility model aims to overcome the not enough of prior art, provide a structural design is reasonable, the design is novel, the simple operation, measurement accuracy are high be used for measuring the device of the high difference of atress point between digital pressure gauge and the etalon.

The utility model is used for measuring the height difference of the stress point between the digital pressure gauge and the standard device, and the measuring device comprises a flat height gauge, a leveling component, an analog-digital meter interface part, a digital meter blind hole length taking-out device and a measuring device; the flat height gauge comprises a flat plate 2, supports 3 symmetrically arranged on two sides below the flat plate 2 and height gauges 1 arranged on the upper surface of the flat plate 2; the leveling component is a leveling block 6 with a hole I7 in the middle; the interface part of the analog-digital meter is a measuring shaft 4 with a hole II 5 in the middle; the device for taking out the length of the blind hole of the digital meter comprises a length taking part 12, wherein an eccentric wheel 22 is hinged on the length taking part 12 through a slotted flat end set screw 13 and is matched with a small tube 11 used by the length taking part 12; the measuring device comprises a base 15, a graduated scale 16 is arranged on the surface of the base 15, the gland 9 is fixed on the two sides of the graduated scale 16 through a cross recessed pan head screw 8, so that the graduated scale 16 is fixed on the surface of the base 15, and a groove 10 capable of placing a lengthening piece 12 is formed in the surface of the base 15.

The surface of the base 15 is provided with a display screen 17 with a sliding block, and the display screen 17 with the sliding block is connected and matched with a pressing block 14 arranged on the surface of the base 15 through a clamping jaw.

The small pipe 11 is made of a hollow plastic rod with a straight steel wire added inside.

The utility model has the advantages that:

the device can improve the accuracy of height difference correction measurement in high-accuracy digital verification, is convenient to use, can improve the working efficiency, and can be widely used in a digital meter verification mechanism; at present, more than one hundred digital verification mechanisms are developed in China, the device has market economic benefit and larger social benefit in production, and can improve the working efficiency and reduce errors caused by the height difference of verification work.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic diagram of the structure of the interface components of the analog-digital meter.

Fig. 3 is a cross-sectional view of fig. 2.

FIG. 4 is a schematic structural view of a leveling assembly.

Fig. 5 is a schematic view of the structure of the level.

FIG. 6 is a schematic structural diagram of a device for taking out the length of a blind hole of a digital meter and a measuring device.

Fig. 7 is a front view of the elongated member.

Fig. 8 is a side view of the elongated member.

Fig. 9 is a cross-sectional view of fig. 8.

Fig. 10 is a schematic structural view of the eccentric wheel.

Fig. 11 is a cross-sectional view of fig. 10.

Fig. 12 is a schematic view of a structure in which a digitizer is mounted on a piston.

In the figure: the height gauge comprises a height gauge 1, a flat plate 2, a support 3, a measuring shaft 4, a hole II 5, a leveling block 6, a hole I7, a cross-shaped groove pan head screw 8, a gland 9, a groove 10, a small tube 11, a lengthening piece 12, a slotted flat end set screw 13, a pressing block 14, a base 15, a graduated scale 16, a display screen 17 with a sliding block, a piston rod 18, a piston sleeve 19, a piston bottom stress point 20, a digital meter internal stress point 21, an eccentric wheel 22, a piston base 23 and a level gauge 24.

Detailed Description

The present invention will be further described with reference to fig. 1-9.

The utility model discloses by height gauge 1, flat board 2, support 3, measuring spindle 4, hole II 5, transfer horizontal piece 6, hole I7, cross recess pan head screw 8, gland 9, recess 10, tubule 11, get long 12, fluting flat end holding screw 13, briquetting 14, base 15, scale 16, have the display screen 17, eccentric wheel 22, the piston base 23 constitution of slider. The concrete structure is as follows: the measuring device comprises a flat height gauge, a leveling component, an analog-digital meter interface part, a digital meter blind hole length taking-out device and a measuring device; the flat height gauge comprises a flat plate 2, supports 3 symmetrically arranged on two sides below the flat plate 2 and height gauges 1 arranged on the upper surface of the flat plate 2; the leveling component is a leveling block 6 with a hole I7 in the middle; the interface part of the analog-digital meter is a measuring shaft 4 with a hole II 5 in the middle; the device for taking out the length of the blind hole of the digital meter comprises a length taking part 12, wherein an eccentric wheel 22 is hinged on the length taking part 12 through a slotted flat end set screw 13 and is matched with a small tube 11 used by the length taking part 12; the measuring device comprises a base 15, a graduated scale 16 is arranged on the surface of the base 15, the gland 9 is fixed on the two sides of the graduated scale 16 through a cross recessed pan head screw 8, so that the graduated scale 16 is fixed on the surface of the base 15, and a groove 10 capable of placing a lengthening piece 12 is formed in the surface of the base 15. The surface of the base 15 is provided with a display screen 17 with a sliding block, and the display screen 17 with the sliding block is connected and matched with a pressing block 14 arranged on the surface of the base 15 through a clamping jaw. The small pipe 11 is made of a hollow plastic rod with a straight steel wire added inside.

The measurement principle is as follows:

as shown in fig. 9, H is the height difference to be measured, and H ═ H₁+H₂。H₂The height difference between the stress point 20 at the bottom of the piston and the stress point 21 in the digital meter is measured, because the stress point 20 at the bottom of the piston can be measured after the piston rod 18 is installed, and the stress point 20 at the bottom of the piston is in a closed structure after the piston rod 18 is installed, the measurement of the point can be completed only by indirect measurement.

Secondly, the internal force point 21 of the digital meter to be measured is measured by using an analog digital meter interface part at present, the internal force point 21 of the digital meter is also arranged inside the joint and needs indirect measurement to obtain, and the height difference of the two points to be measured is on different horizontal planes, so that the measurement accuracy is not easy to guarantee.

H₁The depth of an interface part of an analog-digital meter to a blind hole of a diaphragm in the digital meter is mounted, and the diaphragm cannot be damaged by too large force and impact force, so that the conventional depth gauge cannot be used for direct measurement, and the depth can be obtained by indirect measurement. Measuring H ═ H₁+H₂The resulting pressure difference is then calculated on the basis of the density of the pressure medium used by the device, and pressure compensation is carried out.

The measuring method comprises the following steps:

1)H₂the measurement of (2): firstly, a flat plate 2 with adjustable level is manufactured, and the length L of a piston rod 18 is measured on the flat plate 2 by a height gauge 1₁Then piston rod 18 is installed back into the piston manometer; making an interface part of an analog-digital meter, and measuring the actual length L of the interface part of the analog-digital meter on a flat plate 2 by using a height gauge 1₂Then it is mounted on the movable joint of piston pressure meter digital meter to simulate the mounting state of digital meter, and the leveling component is used to regulate piston rod 18,Simulating the level of the joint of the interface part of the digital meter, firstly, placing a leveling component on the piston rod 18, and adjusting the level of the piston rod 18 by using a level meter 24; then the leveling component is placed on the interface part of the analog-digital meter, and the level of the joint of the interface part of the analog-digital meter is adjusted by a level meter 24; the flat plate 2 is arranged on the surface of a piston base 23, the flat plate 2 is adjusted to the horizontal position by a level gauge 24, then the piston rod 18 is lifted to the working position, and the height L of the piston rod 18 relative to the flat plate 2 is measured by a height gauge 1₃The height L of an analog digital meter interface part arranged on an active joint of a piston pressure meter digital meter relative to a flat plate 2 is measured by a height gauge 1_4，Calculate H₂The following formula:

H₂＝(L₄-L₂)-(L₃-L₁)

H₂＝L₄+L₁-(L₂+L₃)

2)H₁the measurement of (2): h₁Because the diaphragm is arranged in the pressure of the digital meter, the diaphragm cannot be damaged by the collision of hardware and impact force, the direct measurement cannot be carried out by using a depth ruler, but the length of a blind hole is taken out by using a material which cannot damage the pressure diaphragm and then measured, so that the length of the blind hole is taken out by using a soft plastic material, the length of a small pipe 11 is taken out by using a phi 2.2MM hollow plastic rod which is relatively straight, in order to increase the rigidity and the straightness, a straight steel wire is additionally arranged in the hollow plastic rod to form the small pipe 11, the length of the small pipe 11 is taken out by using a taking-out piece 12, namely, the small pipe 11 with a certain length is put into the hole of the taking-out piece 12, then the taking-out piece 12 with the small pipe 11 is put at the interface of the digital meter, the phi 2.2MM small pipe 11 freely falls to the bottom, then the eccentric wheel 22 is rotated to clamp the small pipe 11, then the small pipe 11 is put, finally displayed by a display screen 17 with a slide block, and the measured value is H₁Using the formula H ═ H₁+H₂；H₂＝L₄+L₁-(L₂+L₃)；H＝H₁+L₄+L₁-(L₂+L₃)。

3) After H is calculated, the pressure value which needs to be compensated can be calculated according to the effective area of the used piston and the used medium, or the weight mass of the pressure value on the piston can be compensated.

Claims (3)

1. A device for measuring stress point height difference between digital pressure gauge and the etalon, its characterized in that: the measuring device comprises a flat height gauge, a leveling component, an analog-digital meter interface part, a digital meter blind hole length taking-out device and a measuring device; the flat plate height gauge comprises a flat plate (2), supports (3) symmetrically arranged on two sides below the flat plate (2) and height gauges (1) arranged on the upper surface of the flat plate (2); the leveling component is a leveling block (6) with a hole I (7) in the middle; the interface part of the analog-digital meter is a measuring shaft (4) with a hole II (5) in the middle; the device for taking out the length of the blind hole of the digital meter comprises a length taking part (12), wherein an eccentric wheel (22) is hinged on the length taking part (12) through a slotted flat end set screw (13), and the length taking part (12) is matched with a small pipe (11); the measuring device comprises a base (15), wherein a graduated scale (16) is arranged on the surface of the base (15), the two sides of the graduated scale (16) are fixed with a gland (9) through cross recessed pan head screws (8), so that the graduated scale (16) is fixed on the surface of the base (15), and a groove (10) capable of placing a lengthening piece (12) is formed in the surface of the base (15).

2. The apparatus for measuring the force point height difference between a digital pressure gauge and a standard according to claim 1, wherein: the surface of the base (15) is provided with a display screen (17) with a sliding block, and the display screen (17) with the sliding block is connected with a pressing block (14) arranged on the surface of the base (15) through a clamping jaw for matching use.

3. The apparatus for measuring the force point height difference between a digital pressure gauge and a standard according to claim 1, wherein: the small pipe (11) is made by additionally arranging a straight steel wire in a hollow plastic rod.

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