A differential pressure gauge fixing device for metrological calibration

Abstract

The utility model discloses a kind of differential pressure gauge fixing devices for measurement calibration, belong to the technical field of measuring tool, including base, the base is equipped with the fixed base of arc structure, the fixed base is equipped with the clamping assembly that can be to differential pressure gauge center fixed;The lowest point side of the fixed base is equipped with support plate, the support support plate upper portion is equipped with the height adjuster corresponding with the lowest point of the fixed base, the height adjuster is contacted with the top surface of differential pressure gauge and forms four-point support with the clamping assembly and fixed base.Arc structure's fixed base can form center support to the lowest point of differential pressure gauge, clamping assembly cooperates with height adjuster, finally can form the fixation of four points of up and down left and right to different specifications of differential pressure gauge, to form the stable fixed state of differential pressure gauge, reduce the interference of external fixed factor to calibration accuracy, improve the precision of calibration.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of measuring tools, and particularly relates to a differential pressure gauge fixing device for measurement and calibration. BACKGROUND

[0002] A differential pressure gauge is a tool for measuring the pressure difference of a medium, and reflects the flow state or pressure state of the measured medium by measuring the difference between the pressure values at two different positions. The differential pressure gauge mainly comprises a pointer, a dial, a handle, a rotor and the like. Some differential pressure gauges use a rubber diaphragm as a sensitive element, and when the differential pressure acts on the diaphragm, the diaphragm deforms and drives the pointer to rotate, thereby indicating the pressure data on the dial. The differential pressure gauge is widely used for measuring the pressure of a fan and a blower, the resistance of a filter, the wind speed, the furnace pressure, the differential pressure of an orifice plate, the bubble water level and the pressure of a liquid amplifier or a hydraulic system, etc. Meanwhile, it is also used for controlling the air-gas ratio in a combustion process and the automatic valve control, and monitoring the blood pressure and respiratory pressure in a medical care device.

[0003] A differential pressure gauge is an instrument for measuring the pressure difference of a gas between different points. It is based on Bernoulli's theorem and converts the differential pressure into a physical quantity of flow rate or flow volume, and realizes measurement through this method. The differential pressure gauge is used for: medical industry GMP certification special instrument; used for measuring the positive and negative pressure difference of a clean room of a pharmaceutical factory, an electronic factory, a heating and ventilation air conditioner, a purification air conditioner, a purification tornado shower room special table, and a clean air conditioner filter screen pressure difference detector, etc. According to the requirements of GMP and the measurement and verification regulations, the differential pressure gauge of the company needs to be calibrated every year to ensure the accuracy of the instrument and meet the use requirements.

[0004] In the prior art, when the differential pressure gauge is calibrated, the differential pressure gauge is held by hand to measure, the differential pressure gauge itself has high accuracy, the hand-held differential pressure gauge is easy to cause unstable reading, and the accuracy of the measurement result cannot be ensured, manual holding consumes manpower and physical strength, and the stable state during calibration and testing of the differential pressure gauge cannot be ensured, thereby affecting the calibration accuracy. UTILITY MODEL CONTENTS

[0005] To solve the problem that the calibration accuracy is not accurate due to the unstable state during calibration of the differential pressure gauge, the utility model provides a differential pressure gauge fixing device for measurement and calibration.

[0006] The utility model is implemented through the following technical solutions:

[0007] The utility model provides a differential pressure gauge fixing device for metrological calibration, including the base, be equipped with the fixed seat of arc structure on the base, be equipped with the clamping assembly of can be fixed to the differential pressure gauge in the fixed seat in the middle, one side of the lowest point of fixed seat is equipped with the support plate, the upper portion of support plate is equipped with the height adjuster corresponding with the lowest point of fixed seat, the top surface of differential pressure gauge is contacted by height adjuster and forms four point support with clamping assembly and fixed seat.

[0008] The arc-shaped fixed seat can centrally support the lowest point of the differential pressure gauge. The clamping assembly and the height adjuster cooperate to finally fix the differential pressure gauge of different specifications from four points, thereby achieving stable fixing of the differential pressure gauge, reducing the interference of external fixing factors on the calibration accuracy, and improving the calibration accuracy.

[0009] Further improvements of the utility model also include that the clamping assembly includes a double-threaded screw rod, positioning nuts, and support columns. The positioning nuts are symmetrically arranged on the double-threaded screw rod. The support columns are installed on the positioning nuts. An adjusting hole one is formed in the fixed seat and is in the same vertical plane as the arc line of the fixed seat. The double-threaded screw rod and the two positioning nuts are arranged in the adjusting hole one. The adjusting hole one is adapted to the positioning nuts. An adjusting hole two is formed in the top surface of the fixed seat and is in communication with the adjusting hole one. The support columns are slidably arranged in the adjusting hole two.

[0010] Further improvements of the utility model also include that the support columns are detachably installed with anti-slip close-fitting members.

[0011] Further improvements of the utility model also include that a plurality of height adjustment holes are sequentially arranged on the support columns from top to bottom. Insert rods connected to the anti-slip close-fitting members are inserted into the height adjustment holes.

[0012] Further improvements of the utility model also include that a middle scale line is marked at the lowest point of the fixed seat.

[0013] Further improvements of the utility model also include that notches are formed in the top surfaces of the positioning nuts. The support columns are inserted into the notches. When the support columns are inserted into the notches, the sides of the support columns close to the fixing positions of the differential pressure gauges are in the same vertical plane as the end surfaces of the positioning nuts close to the fixing positions of the differential pressure gauges.

[0014] Further improvements of the utility model also include that levels are arranged on the sides of the fixed seat away from the support plates. The levels are arranged inside the base. The positions corresponding to the levels on the top surfaces of the base are transparent regions.

[0015] The further improvement of the utility model also has that the above -mentioned level includes the target ring of setting below the transparent area, the water drop of condensation rolls on the surface of the target ring.

[0016] The further improvement of the utility model also has that the base is provided with the leg column with adjustable height at four corners of the bottom surface.

[0017] From the above technical scheme, the beneficial effects of the utility model are that the fixed seat of arc structure can form central support to the lowest point of pressure difference table, the clamping assembly cooperates with the height adjuster, and finally can form the fixation of four points of up, down, left and right to different specifications of pressure difference table, so that the stable fixation state is formed to the pressure difference table, the interference of external fixation factors to the calibration accuracy is reduced, and the calibration accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the utility model, the drawings needed to be used in the description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to the drawings for the ordinary skilled in the art without creating labor.

[0019] Figure 1 It is the first structural schematic view of the specific embodiment of the utility model.

[0020] Figure 2 It is the second structural schematic view of the specific embodiment of the utility model.

[0021] Figure 3 It is the structural schematic view of the pressure difference table fixing assembly of the specific embodiment of the utility model.

[0022] Figure 4 It is the fixed seat of the specific embodiment of the utility model.

[0023] Figure 5 It is the structural schematic view of the clamping assembly of the specific embodiment of the utility model.

[0024] Figure 6 It is the internal structure schematic view of the level of the specific embodiment of the utility model.

[0025] In the drawings, 1, base;2, fixed seat;21, adjusting hole one;22, adjusting hole two;23, double thread screw rod;24, support column;241, height adjusting hole;25, antiskid close part;251, plug rod;26, positioning nut;3, support plate;4, upper platform;5, height adjuster;6, level;7, leg column;8, water drop;9, target ring. CONCRETE EMBODIMENT

[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0027] like Figures 1-6 As shown, a differential pressure gauge fixing device for metrological calibration includes a base 1, on which a fixing seat 2 with an arc-shaped structure is provided. The fixing seat 2 is provided with a clamping component that can fix the differential pressure gauge in a centered position. The fixing seat 2 supports the lowest point of the differential pressure gauge, and the clamping component clamps the differential pressure gauge symmetrically on both sides, thereby forming a three-point support.

[0028] The clamping assembly includes a double-threaded screw 23, a positioning nut 26, and a support column 24. Two positioning nuts 26 are provided, symmetrically arranged on the double-threaded screw 23, and the support column 24 is mounted on the positioning nuts 26. The fixing base 2 has an adjustment hole 21 in the same vertical plane as the arc of the fixing base 2. The double-threaded screw 23 and the two positioning nuts 26 are disposed within the adjustment hole 21, and the adjustment hole 21 is adapted to the positioning nuts 26. The top surface of the fixing base 2 has an adjustment hole 22 communicating with the adjustment hole 21, and the support column 24 is slidably disposed within the adjustment hole 22. The positioning nut 26 is placed in the adjustment hole 21 that is adapted to the positioning nut 26, so that when the double threaded screw 23 is rotated, the two positioning nuts 26 move towards each other in the adjustment hole 21; the support column 24 passes downward through the adjustment hole 22 and is connected to the positioning nut 26, so that the support column 24 moves with the positioning nut 26, thereby completing the symmetrical clamping of the two sides of the differential pressure gauge.

[0029] A rubber anti-slip fastener 25 is detachably installed on the support column 24, and the anti-slip fastener 25 has an arc-shaped structure with its opening facing the position where the differential pressure gauge is to be fixed. The rubber anti-slip fastener 25 with its arc-shaped structure not only has a certain degree of resilience, but also has strong friction, which can form a better fixed support when it comes into contact with the differential pressure gauge.

[0030] The support column 24 is provided with multiple height adjustment holes 241 arranged sequentially from top to bottom. A rod 251 connected to the anti-slip fastener 25 can be inserted into each height adjustment hole 241. According to the required differential pressure gauge specifications, the rod 251 is matched with the height adjustment holes 241 of different heights to complete the adaptation between the anti-slip fastener 25 and the differential pressure gauge to be calibrated.

[0031] The lowest point of the fixed seat 2 is marked with a middle scale line; the two positioning nuts 26 are adjusted to the close state in advance through the middle scale line, and whether the gap between the two positioning nuts 26 corresponds to the middle scale line is observed to ensure that the differential pressure gauge to be calibrated is centered in the middle of the fixed seat 2 during the calibration operation, and at the same time, the contact pressure of the anti-slip close parts 25 on both sides is ensured to be the same, forming symmetrical support.

[0032] The top surface of the positioning nut 26 is provided with a notch, the support column 24 can be inserted into the notch, and when the support column 24 is inserted into the notch, the side surface of the support column 24 close to the fixed position of the differential pressure gauge is in the same vertical plane as the end surface of the positioning nut 26 close to the fixed position of the differential pressure gauge. When observing whether the gap in the middle of the two positioning nuts 26 is corresponding to the middle scale line when they are close, whether the two support columns 24 without anti-slip close parts 25 are at the middle scale line after being close can be observed to quickly determine whether the clamping assembly needs to be adjusted on the fixed seat 2.

[0033] The fixed seat 2 is provided with a support plate 3 on one side of the lowest point, the upper part of the support plate 2 is provided with an upper platform 4 extending upwards from the fixed seat 2, the upper platform 4 is provided with a height adjuster 5 corresponding to the lowest point of the fixed seat 2 in an up-down manner, and the height adjuster 5 is a screw rod structure penetrating and threadedly connected to the upper platform 4; the height adjuster 5 contacts the top surface of the differential pressure gauge and forms a four-point support with the clamping assembly and the fixed seat 2. The arc-shaped fixed seat 2 can centrally support the lowest point of the differential pressure gauge, the clamping assembly cooperates with the height adjuster 5, and finally a four-point fixation of up, down, left and right can be formed for differential pressure gauges of different specifications, so that a stable fixed state of the differential pressure gauge is formed, and the interference of external fixation factors on the calibration accuracy is reduced.

[0034] The fixed seat 2 is provided with a level 6 on the side away from the support plate 3, the level 6 is arranged inside the base 1, and the position corresponding to the level 6 on the top surface of the base 1 is a transparent area; the level 6 includes a target ring 9 arranged below the transparent area, and condensed water droplets 8 roll on the surface of the target ring 9. The level 6 can detect the plane where the base 1 is located to assist in adjusting the judgment of the environment to be calibrated.

[0035] The bottom surface of the base 1 is provided with height-adjustable leg columns 7 at the four corners. Through the adjustment of the leg columns 7, the base 1 is quickly completed in a horizontal state in cooperation with the level 6.

[0036] The utility model discloses a differential pressure gauge fixing device for measurement and calibration, the fixed base of arc structure can form the central support of the lowest point of the differential pressure gauge, and the clamping assembly cooperates with the height adjuster, and finally can form the fixation of four points of up, down, left and right to the differential pressure gauge of different specifications, so that the stable fixed state is formed to the differential pressure gauge, the interference of external fixed factors to the calibration accuracy is reduced, and the calibration precision is improved.

[0037] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0038] In the specification, the terms "upper", "lower", "outer side" and "inner side" in the description and claims and the above drawings, if any, are used to distinguish the relative relationship in position, and do not have to be given a nature. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A differential pressure gauge fixing device for metrological calibration, comprising a base (1), characterised in that, The base (1) is provided with an arc-shaped fixing seat (2), the fixing seat (2) is provided with a clamping assembly capable of fixing the pressure difference table centrally; the fixing seat (2) is provided with a support plate (3) on the lowest point side, the support plate (3) is provided with a height adjuster (5) corresponding to the upper and lower points of the fixing seat (2), the height adjuster (5) is in contact with the top surface of the pressure difference table and forms a four-point support with the clamping assembly and the fixing seat (2).

2. A differential pressure gauge fixing device for metrological calibration according to claim 1, characterized in that, The clamping assembly comprises a double-thread screw rod (23), a positioning nut (26) and a support column (24); the positioning nut (26) is provided with two, and the two positioning nuts (26) are symmetrically arranged on the double-thread screw rod (23), and the support column (24) is installed on the positioning nut (26); the fixing seat (2) is provided with an adjusting hole (21) in the same vertical plane as the arc line of the fixing seat (2), the double-thread screw rod (23) and the two positioning nuts (26) are arranged in the adjusting hole (21), and the adjusting hole (21) is matched with the positioning nut (26); the top surface of the fixing seat (2) is provided with an adjusting hole (22) communicating with the adjusting hole (21), and the support column (24) is slidably arranged in the adjusting hole (22).

3. A differential pressure gauge fixing device for metrological calibration according to claim 2, characterized in that, The support column (24) is detachably provided with an anti-skid close piece (25).

4. A differential pressure gauge fixing device for metrological calibration according to claim 3, characterized in that, The support column (24) is provided with a plurality of height adjustment holes (241) from top to bottom, and the height adjustment hole (241) is provided with a connecting rod (251) connected to the anti-skid close piece (25).

5. A differential pressure gauge fixing device for metrological calibration according to any one of claims 2 to 4, characterised in that, The lowest point of the fixing seat (2) is marked with a middle scale line.

6. A differential pressure gauge fixing device for metrological calibration according to claim 5, characterized in that The top surface of the positioning nut (26) is provided with a notch, the support column (24) is inserted into the notch, and the side surface of the support column (24) close to the fixed position of the pressure difference table is in the same vertical plane as the end surface of the positioning nut (26) close to the fixed position of the pressure difference table.

7. A differential pressure gauge fixing device for metrological calibration according to any one of claims 1 to 4, characterized in that, The side of the fixing seat (2) away from the support plate (3) is provided with a level (6), the level (6) is arranged inside the base (1), and the position corresponding to the level (6) on the top surface of the base (1) is a transparent area.

8. A differential pressure gauge fixing device for metrological calibration according to claim 7, characterized in that The level (6) comprises a target ring (9) arranged below the transparent area, and the surface of the target ring (9) is rolled with condensed water droplets (8).

9. A differential pressure gauge fixing device for metrological calibration according to claim 8, characterized in that The bottom surface of the base (1) is provided with height-adjustable leg columns (7) at four corners.

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