Universal flange plate for verification and calibration of flange type pressure gauge

Abstract

The universal flange plate comprises a flange plate body, a connecting pipe and a nut connecting end, a circular through hole is formed in the center of the flange plate body, the connecting pipe is arranged at the bottom of the circular through hole, and the universal nut connecting end is arranged at the bottom of the connecting pipe. Four U-shaped holes are evenly formed in the periphery of the flange plate, and a pressing assembly is slidably connected into the U-shaped hole in the lower portion of the U-shaped hole. According to the invention, through the pressing assembly slidably connected in the U-shaped hole, flange type pressure gauges of different specifications can be fixed; by adopting the design of the double-layer sealing ring and the three-layer fixing ring, the gas tightness and the tightness in a high-pressure environment are ensured, the condition of medium gas or liquid leakage is avoided, the verification and calibration of the existing industrial flange type pressure gauges with different specifications can be realized, the working efficiency is greatly improved, the verification accuracy is ensured, the disassembly and assembly are convenient, the maintenance is convenient, and the practicability is high. The method is simple to operate and can be used for lifetime after once investment.

Description

Technical Field

[0001] The invention relates to a flange, in particular to a universal flange for verification and calibration of a flange-type pressure gauge, belonging to the technical field of equipment detection. Background Art

[0002] Flange-type pressure gauges, due to their stable structure and excellent sealing performance, are widely used in industrial fields, particularly in applications requiring precise pressure measurement, such as in the petrochemical, electric power, and machinery manufacturing industries. These pressure gauges are typically connected to pipelines or equipment via flanges. Special flange fasteners are fitted at the lower end, and a seal (containing hydraulic fluid) is located at the center to transmit the pressure signal. Before using flange-type pressure gauges in laboratories or industrial sites, they must be calibrated and verified to ensure measurement accuracy and precision. Since flanged pressure gauges come in a wide variety of models and specifications, and their flange sizes vary, it is necessary to process multiple matching flanges of the same style and specification as the original pressure gauge flanges when verifying and calibrating the gauge in the laboratory. These flanges must then be welded or fixed and sealed before verification and calibration can be performed. This method is time-consuming, labor-intensive, wasteful, and inefficient. It not only increases the production, inventory, and management of spare parts required for verification and calibration, but also greatly increases the number of redundant verification / calibration steps, increasing the possibility of systematic errors in the verification process. Furthermore, it increases the time cost of verification and calibration work, increases the number of verification and calibration personnel, and frequent disassembly and assembly operations may damage flanges or seals, affecting the service life of the pressure gauge and the accuracy and precision of verification. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a universal flange for verification and calibration of flange-type pressure gauges, thereby eliminating the tedious process of making flanges of different specifications, improving work efficiency, reducing personnel allocation, greatly reducing the complexity of the operation process, and ensuring the accuracy and timeliness of verification and calibration results.

[0004] The technical solution adopted by the present invention to solve the technical problem is: A universal flange for verification and calibration of flange-type pressure gauges comprises a flange, a connecting pipe and a nut connecting end. A circular through hole is provided in the center of the flange, a connecting pipe is provided at the bottom of the circular through hole, a nut connecting end is provided at the bottom of the connecting pipe, U-shaped holes are provided at the edges of the flange, and a clamping assembly is slidably connected in the U-shaped hole.

[0005] There are four clamping components, which are respectively composed of a base, a support plate, a pressure handle and a handle. A support plate is vertically arranged above the base. The upper right end of the support plate is hinged to the bottom of the left end of the pressure handle, the top of the left end of the pressure handle is hinged to the right end of the handle, the side of the handle is hinged to the top of the middle connecting plate, and the bottom of the middle connecting plate is hinged to the upper left end of the support plate.

[0006] The handle consists of a first support handle and a second support handle. The left end of the first support handle is connected to the second support handle. The angle between the first support handle and the second support handle is 120°. The right end of the first support handle is hinged to the top of the left end of the pressing handle.

[0007] U-shaped frames are respectively provided on both sides of the bottom of the U-shaped hole, and the ends of the base are slidably connected to the U-shaped frames.

[0008] The pressing handle is distributed in a U-shape, and a rubber pad is provided at the bottom of the right end of the pressing handle.

[0009] A first limiting ring is provided on the outside of the circular through hole, a second limiting ring is provided at an outer interval of the first limiting ring, a third limiting ring is provided at an outer interval of the second limiting ring, a first sealing ring is provided in the annular space between the first limiting ring and the second limiting ring, and a second sealing ring is provided in the annular space between the second limiting ring and the third limiting ring.

[0010] The first sealing ring and the second sealing ring are both made of perfluororubber material.

[0011] There are four U-shaped holes, which are evenly distributed outside the circular through hole, and the angle between adjacent U-shaped holes is 90°.

[0012] A support is provided on the outer wall of the lower end of the connecting pipe, and a slope support is provided between the support and the bottom surface of the flange.

[0013] The positive beneficial effects of the present invention are: 1. The present invention provides a slope support between the bottom of the flange and the support, thereby enhancing the strength and stability of the structure, which is beneficial to the long-term and stable implementation of verification and calibration work.

[0014] 2. The present invention has a clamping assembly that is slidably connected in the U-shaped hole, which can fix flanges of different specifications according to the size of the flange pressure gauge. There is no need to separately process matching flanges, which reduces resource waste, improves work efficiency and saves costs.

[0015] 3. The present invention adopts a double-layer sealing ring design, and the sealing ring is made of perfluororubber material, which has good high temperature resistance and corrosion resistance, ensuring sealing performance under high pressure environment, avoiding leakage of intermediate gas or liquid, and improving the safety and accuracy of the calibration process.

[0016] 4. The present invention increases the contact surface area by arranging a rubber pad at the bottom of the front end of the pressure handle, thereby increasing the reliability of the pressure gauge flange being pressed and fixed, and avoiding wear on the flange chassis of the pressure gauge being tested, making it convenient for staff to quickly press the pressure gauge chassis, and is easy to disassemble and assemble, and simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a usage state diagram of the present invention; Figure 2 It is a structural schematic diagram of the flange of the present invention; Figure 3 for Figure 1 Side view of; Figure 4 It is a structural schematic diagram of the compression assembly of the present invention; Among them: 1-flange, 2-U-shaped hole, 3-U-shaped frame, 401-first limiting ring, 402-second limiting ring, 402-third limiting ring, 501-first sealing ring, 502-second sealing ring, 6-connecting pipe, 601-slope support, 7-support, 8-nut connecting end, 9-base, 10-support plate, 11-pressure handle, 12-rubber pad, 13-first support handle, 14-second support handle, 15-middle connecting plate. DETAILED DESCRIPTION

[0018] The present invention will be further explained and illustrated below with reference to the accompanying drawings: Example, participate Figures 1-4 A universal flange for verification and calibration of flange-type pressure gauges includes a flange 1, a connecting pipe 6 and a nut connecting end 8. A circular through hole is provided in the center of the flange 1, a connecting pipe 6 is provided at the bottom of the circular through hole, a nut connecting end 8 is provided at the bottom of the connecting pipe 6, and a U-shaped hole 3 is provided at the edges of the flange 1. A clamping component is slidably connected in the U-shaped hole 3.

[0019] There are four clamping components, which are respectively composed of a base 9, a support plate 10, a pressing handle 11 and a handle. A support plate 10 is vertically arranged above the base 9. The upper right end of the support plate 10 is hinged to the bottom of the left end of the pressing handle 11, the top of the left end of the pressing handle 11 is hinged to the right end of the handle, the side of the handle is hinged to the top of the middle connecting plate 15, and the bottom of the middle connecting plate 15 is hinged to the upper left end of the support plate 10.

[0020] The handle consists of a first handle 13 and a second handle 14. The left end of the first handle 13 is connected to the second handle 14. The angle between the first handle 13 and the second handle 14 is 120°. The right end of the first handle 13 is hinged to the top of the left end of the pressing handle 11.

[0021] U-shaped frames 3 are respectively provided on both sides of the bottom of the U-shaped hole 3 , and the ends of the base 9 are slidably connected to the U-shaped frames 3 .

[0022] The pressing handle 11 is U-shaped, and a rubber pad 12 is provided at the bottom of the right end of the pressing handle 11 .

[0023] A first limiting ring 401 is arranged on the outside of the circular through hole, a second limiting ring 402 is arranged at an outer interval of the first limiting ring 401, a third limiting ring 403 is arranged at an outer interval of the second limiting ring 402, a first sealing ring 501 is arranged in the annular space between the first limiting ring 401 and the second limiting ring 402, and a second sealing ring 502 is arranged in the annular space between the second limiting ring 402 and the third limiting ring 403.

[0024] The first sealing ring 501 and the second sealing ring 402 are both made of perfluororubber material.

[0025] There are four U-shaped holes 3 evenly distributed outside the circular through hole, and the angle between adjacent U-shaped holes 3 is 90°.

[0026] A support 7 is provided on the outer wall of the lower end of the connecting pipe 6 , and a slope support 601 is provided between the support 7 and the bottom surface of the flange 1 .

[0027] In the above description, when the second support handle is flipped upward, the pressing handle is in a raised state, and when the second support handle is pressed downward, the pressing handle can move the casting downward and press and fix the chassis of the flange pressure gauge.

[0028] In the above description, when the base is moved to the middle or right side of the U-shaped frame, the pressing handle can press and fix the flange-type pressure gauge chassis.

[0029] In the above description, the first limiting ring, the second limiting ring, and the third limiting ring are distributed concentrically, and their outer diameters increase in sequence.

[0030] In the above description, the inner diameter of the circular through hole is consistent with the size of the inner hole of the flange pressure gauge chassis. In actual operation, the inner hole size of the flange pressure gauge chassis remains unchanged, and the outer diameter of the chassis changes.

[0031] In the above description, the nut connection end is connected to the pipe mouth of the detection equipment through a thread, and the chassis of the flange pressure gauge to be detected is fixedly connected to the flange through a clamping assembly.

[0032] Working principle: Before use, connect the nut connection end to the testing equipment through threads, then place the chassis of the flange pressure gauge to be tested on the sealing ring, and move the clamping assembly according to the outer diameter of the chassis. Finally, use the clamping assembly to tighten and fix the chassis and flange, and then you can perform the testing operation.

[0033] The present invention can fix flange pressure gauges of different specifications by slidingly connecting a compression component in a U-shaped hole; adopts a double-layer sealing ring design to ensure sealing performance under high-pressure environments, avoid leakage of intermediate gas or liquid, improve work efficiency, ensure detection accuracy, and facilitate disassembly and assembly and simple operation.

Claims

1. A universal flange for verification and calibration of flange-type pressure gauges, comprising a flange (1), a connecting pipe (6) and a nut connecting end (8), characterized in that: A circular through hole is provided at the center of the flange (1), a connecting pipe (6) is provided at the bottom of the circular through hole, a nut connecting end (8) is provided at the bottom of the connecting pipe (6), and U-shaped holes (3) are provided at the edges of the flange (1), and a clamping assembly is slidably connected in the U-shaped hole (3).

2. The universal flange for verification and calibration of flange-type pressure gauges according to claim 1, characterized in that: The clamping components are four in number and are respectively composed of a base (9), a support plate (10), a pressure handle (11) and a handle. A support plate (10) is vertically arranged above the base (9). The upper right end of the support plate (10) is hinged to the bottom of the left end of the pressure handle (11). The top of the left end of the pressure handle (11) is hinged to the right end of the handle. The side of the handle is hinged to the top of the middle connecting plate (15). The bottom of the middle connecting plate (15) is hinged to the upper left end of the support plate (10).

3. The universal flange for verification and calibration of flange-type pressure gauges according to claim 2, characterized in that: The handle consists of a first support handle (13) and a second support handle (14), the left end of the first support handle (13) is connected to the second support handle (14), the angle between the first support handle (13) and the second support handle (14) is 120 degrees, and the right end of the first support handle (13) is hinged to the top of the left end of the pressing handle (11).

4. The universal flange for verification and calibration of flange-type pressure gauges according to claim 1, characterized in that: U-shaped frames (3) are respectively provided on both sides of the bottom of the U-shaped hole (3), and the ends of the base (9) are slidably connected to the U-shaped frames (3).

5. The universal flange for verification and calibration of flange-type pressure gauges according to claim 2, characterized in that: The pressing handle (11) is U-shaped, and a rubber pad (12) is provided at the bottom of the right end of the pressing handle (11).

6. The universal flange for verification and calibration of flange-type pressure gauges according to claim 1, characterized in that: A first limiting ring (401) is provided on the outside of the circular through hole, a second limiting ring (402) is provided at an interval outside the first limiting ring (401), a third limiting ring (403) is provided at an interval outside the second limiting ring (402), a first sealing ring (501) is provided in the annular space between the first limiting ring (401) and the second limiting ring (402), and a second sealing ring (502) is provided in the annular space between the second limiting ring (402) and the third limiting ring (403).

7. The universal flange for verification and calibration of flange-type pressure gauges according to claim 6, characterized in that: The first sealing ring (501) and the second sealing ring (402) are both made of perfluororubber material.

8. The universal flange for verification and calibration of flange-type pressure gauges according to claim 1, characterized in that: There are four U-shaped holes (3) evenly distributed outside the circular through hole, and the angle between adjacent U-shaped holes (3) is 90°.

9. The universal flange for verification and calibration of flange-type pressure gauges according to claim 1, characterized in that: A support (7) is provided on the outer wall of the lower end of the connecting pipe (6), and a slope support (601) is provided between the support (7) and the bottom surface of the flange (1).

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