CN222671356U

CN222671356U - Closed safety valve offline calibration device

Info

Publication number: CN222671356U
Application number: CN202421548037.3U
Authority: CN
Inventors: 赵东辉; 李万春; 李佳玲
Original assignee: Changchun Taiheng Electromechanical Equipment Testing Co ltd
Current assignee: Changchun Taiheng Electromechanical Equipment Testing Co ltd
Priority date: 2024-07-02
Filing date: 2024-07-02
Publication date: 2025-03-25
Anticipated expiration: 2034-07-02

Abstract

The utility model relates to a closed safety valve off-line checking device, belonging to a safety valve checking and detecting device. The base flat plate is fixedly connected with the bottom of the outer sealing ring, the inner sealing ring is fixedly connected above the base flat plate, the checking platform is fixedly connected with the top of the inner sealing ring, the bottom of the oil jack is fixedly connected with the top of the base flat plate through bolts, the piston of the oil jack penetrates through the checking platform, the top of the oil jack and the lower side of the checking disc to be fixedly connected with the clamping hook, the clamping hook is slidably connected with the clamping hook slide way of the checking platform, and the lower end of the sealing cover is arranged above the base flat plate and between the inner sealing ring and the outer sealing ring. The advantage is novel structure, presss from both sides tight relief valve through clamping device, and sealing device that forms through sealed cowling, interior sealing washer and outer sealing washer is under airtight environment, and safe and reliable satisfies leakproofness pressure test and leak rate test, has ended the drawback that relies on the manpower to detect, has adapted to the requirement that check out test set reforms transform the upgrading, has more strengthened accurate check-up function.

Description

Off-line checking device for closed safety valve

Technical Field

The utility model belongs to a safety valve checking and detecting device, and particularly relates to a closed type safety valve off-line checking device.

Background

The off-line verification process of the existing safety valve comprises the steps of placing the safety valve on a verification disc, opening a starting device after fixing, clamping the safety valve, opening a pressurizing valve, enabling pressure source gas to pass through a pressure pipeline, enabling the pressure source gas to reach the inner cavity of the safety valve through the verification disc, opening a valve clack when the pressure source gas reaches preset pressure, setting the pressure at the moment, reducing the pressure to 90% of the setting pressure, performing a tightness pressure test, visually checking whether a gauge needle of a pressure gauge falls back or not, and hearing whether a sealing surface has sound of air leakage or not, so that whether the safety valve is qualified or not is judged.

The disadvantages in the above-mentioned verification are:

1. When the valve clack is opened, slag is easy to be clamped, the sealing surface is easy to be damaged, and micro leakage is generated.

2. For the open type safety valve verification at normal temperature, bubble collection is difficult, and the leak rate can not be measured, which is the bottleneck of the whole detection safety valve mechanism detection.

3. The pressure gauge pipeline is shared with the check pipeline, so that the pressure value displayed by the pressure gauge is inaccurate.

4. The check disc is provided with a check pipeline, and the function is single.

Disclosure of Invention

The utility model provides an off-line checking device for a closed safety valve, which aims to solve the problems that old equipment is inaccurate in checking a pressure value by manpower, and an open safety valve can only be heard and visualized by the ear and cannot quantify the leakage rate.

The technical scheme includes that the device comprises a sealing cover, a clamping hook, a checking disc, a checking platform, an inner sealing ring, an oil jack, a base flat plate, an outer sealing ring, a purging pipe, a pressure gauge pipe and a checking pipe, wherein the base flat plate is fixedly connected with the bottom of the outer sealing ring, the upper part of the base flat plate is fixedly connected with the inner sealing ring, the checking platform is fixedly connected with the top of the inner sealing ring, the bottom of the oil jack is fixedly connected with the upper part of the base flat plate through bolts, a piston of the oil jack passes through the checking platform and the top and is fixedly connected with the lower part of the checking disc, the clamping hook is in sliding connection with a clamping hook slideway of the checking platform, the lower end of the sealing cover is arranged above the base flat plate and between the inner sealing ring and the outer sealing ring, and the purging pipe, the pressure gauge pipe and the checking pipe are respectively connected with the checking disc after passing through the checking platform and the base flat plate and the front end.

The check disc is provided with a purging duct, a pressure gauge duct and a check duct and is respectively connected with the front ends of the purging pipe, the pressure gauge pipe and the check pipe.

The oil jack is provided with an oil pipe and is used for being connected with an external oil pressure pump.

The base flat plate is fixedly connected with the verification platform through a fixing bolt.

The utility model has the advantages that the structure is novel, the safety valve is clamped by the clamping device, the sealing device formed by the sealing cover, the inner sealing ring and the outer sealing ring is safe and reliable in a closed environment, the tightness pressure test and the leakage rate test are met, the three pore channels are arranged in the middle of the checking disc, the function of high-pressure purging the cavity is increased, slag inclusion is prevented when the valve clack is opened, the artificial leakage of the sealing surface caused by slag inclusion is solved, an effective path is provided for the pressure meter to directly test the pressure in the safety valve cavity, the original checking function is reserved, the defect of manual detection is finished, the pressure in the valve cavity can be directly measured, the setting pressure is more accurate, the leakage rate of the safety valve is automatically quantized, the bottleneck of the old equipment checking difficulty is broken through, the requirement of the improvement and the upgrading of the detecting equipment is met, and the accurate checking function is more strengthened.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic illustration of the present utility model with the seal cover removed;

FIG. 3 is a cross-sectional view of the present utility model;

FIG. 4 is a schematic view of the structure of the pinch relief valve of the present utility model;

FIG. 5 is a schematic diagram of the construction of a check disk of the present utility model;

fig. 6 is a cross-sectional view of a check disk of the present utility model.

Detailed Description

As shown in fig. 1, 2, 3 and 4, the device comprises a sealing cover 1, a clamping hook 2, a check disc 3, a check platform 4, an inner sealing ring 5, an oil jack 6, a base flat plate 8 and an outer sealing ring 9, a purging pipe 10, a pressure gauge pipe 11 and a check pipe 12, wherein the base flat plate 8 is fixedly connected with the bottom of the outer sealing ring 9, the upper part of the base flat plate 8 is fixedly connected with the inner sealing ring 5, the check platform 4 is fixedly connected with the top of the inner sealing ring 5, the bottom of the oil jack 6 is fixedly connected with the upper part of the base flat plate 8 through bolts, a piston of the oil jack 6 passes through the check platform 4, the top of the oil jack is fixedly connected with the lower part of the check disc 3, the clamping hook 2 is in sliding connection with a clamping hook slideway 401 of the check platform 4, the lower end of the sealing cover 1 is arranged above the base flat plate 8 and between the inner sealing ring 5 and the outer sealing ring 9, and the purging pipe 10, the pressure gauge pipe 11 and the check pipe 12 are respectively connected with the check disc 3 after passing through the check platform 4 and the base flat plate 8 and the front end.

As shown in fig. 5 and 6, the check disk 3 has a purge hole 301, a pressure gauge hole 302, and a check hole 303, and is connected to the front ends of the purge pipe 10, the pressure gauge pipe 11, and the check pipe 12, respectively.

As shown in fig. 3, the hydraulic jack 6 has an oil pipe 601 for connection with an external hydraulic pump.

As shown in fig. 1 and 3, the base plate 8 and the verification platform 4 are fixedly connected through a fixing bolt 7.

Principle of work piece

The base plate 8 is arranged on external equipment, an oil pipe 601 of the oil jack 6 is connected with an external oil pump, a purging pipe 10, a pressure gauge pipe 11 and a checking pipe 12 are respectively connected with a steam source or a pressure gauge through a pressurizing valve and a pressure relief valve, a safety valve 13 to be checked is placed on a checking disc 3, the oil jack 6 jacks the checking disc 3, the safety valve 13 is locked by a clamping hook 2, the pressurizing valve and the pressure relief valve are opened to purge the inner cavity of the safety valve at high pressure, impurities are removed, the pressurizing valve is opened to perform a setting pressure test, water is injected into the space between an inner sealing ring 5 and an outer sealing ring 9 and a certain height liquid level is maintained, a sealing cover 1 is inserted into the liquid level to perform a sealing pressure test, and air bubbles are collected to measure the leakage rate, so that the checking is completed.

Claims

1. A closed safety valve offline calibration device, characterized in that it includes a sealing cover, a clamping hook, a calibration disk, a calibration platform, an inner sealing ring, a hydraulic jack, a base plate, an outer sealing ring, a purge pipe, a pressure gauge pipe and a calibration pipe, wherein the base plate is fixedly connected to the bottom of the outer sealing ring, the upper part of the base plate is fixedly connected to the inner sealing ring, the calibration platform is fixedly connected to the top of the inner sealing ring, the bottom of the hydraulic jack is fixedly connected to the upper part of the base plate by bolts, the piston of the hydraulic jack passes through the calibration platform, the top is fixedly connected to the lower part of the calibration disk, the clamping hook is slidably connected to the clamping hook slideway of the calibration platform, the lower end of the sealing cover is placed above the base plate and between the inner sealing ring and the outer sealing ring, the purge pipe, the pressure gauge pipe and the calibration pipe are connected to the calibration disk at the rear and front ends after passing through the calibration platform and the base plate.

2. A closed safety valve offline calibration device according to claim 1, characterized in that the calibration disk has a purge channel, a pressure gauge channel, and a calibration channel, and is respectively connected to the front end of the purge pipe, the pressure gauge pipe, and the calibration pipe.

3. A closed safety valve offline calibration device according to claim 1, characterized in that the hydraulic jack has an oil pipe for connecting to an external hydraulic pump.

4. A closed safety valve offline calibration device according to claim 1, characterized in that the base plate and the calibration platform are fixedly connected by fixing bolts.