CN220490309U

CN220490309U - Nitrogen sealing valve on-line detection device

Info

Publication number: CN220490309U
Application number: CN202321970135.1U
Authority: CN
Inventors: 唐爽; 李泽宇; 陆冲; 李文婧; 秦晓杉
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-07-25
Filing date: 2023-07-25
Publication date: 2024-02-13
Anticipated expiration: 2033-07-25

Abstract

The utility model discloses an online detection device for a nitrogen seal valve, which relates to the technical field of nitrogen seal valve detection and aims to solve the problems of troublesome detection process and long detection period of the nitrogen seal valve; the air inlet pipe is communicated with the three-way valve on the start-stop pipe through a bypass pipe, a valve II and a pressure stabilizing tank are arranged on the bypass pipe, the valve II is arranged at the upstream of the pressure stabilizing tank, a pressure gauge I and an air outlet are arranged on the pressure stabilizing tank, and a valve III is arranged on the air outlet; the three-way valve on the air outlet pipe is communicated with a test tube, and the other end of the test tube is communicated with a water tank.

Description

Nitrogen sealing valve on-line detection device

Technical Field

The utility model relates to the technical field of nitrogen seal valve detection, in particular to an online detection device for a nitrogen seal valve.

Background

The nitrogen seal valve is mainly applied to the top of the storage tank and is used for maintaining micro positive pressure in the storage tank, isolating contact between materials and the outside, reducing volatilization and waste of the materials and protecting installation of the storage tank.

The existing nitrogen seal valve is a safety accessory which is required to be installed on a flammable and explosive dangerous article storage tank, when the nitrogen seal valve is used, nitrogen needs to be supplemented into the tank in a constant pressure and quantitative mode, and safe operation of the storage tank is guaranteed, so that all parameters of the nitrogen seal valve are required to be accurate, the nitrogen seal valve is required to be detected at present, the nitrogen seal valve is required to be detached from the storage tank, the nitrogen seal valve is adjusted in a transportation workshop, all parameters of the nitrogen seal valve are detected in the workshop, the nitrogen seal valve is transported back to be installed on the storage tank after detection is completed, the process is very troublesome, and the detection period is long.

Disclosure of Invention

In order to solve the problems that the detection process of the nitrogen seal valve is troublesome and the detection period is long, the utility model provides an online detection device of the nitrogen seal valve, which comprises a storage tank, wherein the storage tank is provided with a nitrogen seal valve body, an air inlet end, an air outlet end and a start-stop end of the nitrogen seal valve body are respectively communicated with an air inlet pipe, an air outlet pipe and a start-stop pipe, the other end of the air inlet pipe is communicated with an air source, the other ends of the air outlet pipe and the start-stop pipe are both communicated with the storage tank, and three-way valves are arranged on the air outlet pipe and the start-stop pipe; the air inlet pipe is communicated with the three-way valve on the start-stop pipe through a bypass pipe, a valve II and a pressure stabilizing tank are arranged on the bypass pipe, the valve II is arranged at the upstream of the pressure stabilizing tank, a pressure gauge I and an air outlet are arranged on the pressure stabilizing tank, and a valve III is arranged on the air outlet; the three-way valve on the air outlet pipe is communicated with a test tube, the other end of the test tube is communicated with a water tank, and one end of the test tube stretches into the water tank.

Through adopting above-mentioned technical scheme, can realize not dismantling under the circumstances of nitrogen seal valve body, detect opening pressure, closing pressure and the leakage quantity of nitrogen seal valve body, and then make the testing process to nitrogen seal valve body simpler and more convenient, detect more quick, and then detect the cycle shorter.

The utility model is further provided with: and a flowmeter is arranged on the test tube.

Through adopting above-mentioned technical scheme, the flowmeter can detect out the flow change of survey in the test tube, and then is convenient for judge the closing condition of nitrogen seal valve.

The utility model is further provided with: and a valve I is arranged on the air inlet pipe.

Through adopting above-mentioned technical scheme, the valve one can control the intercommunication of nitrogen seal valve body and air supply, and then realizes the control to nitrogen seal valve body is whole.

The utility model is further provided with: and the air inlet pipe is also provided with a second pressure gauge, and the second pressure gauge is arranged at the downstream of the first valve.

By adopting the technical scheme, the second pressure gauge can detect the air pressure value in the air inlet pipe.

The beneficial effects of the utility model are as follows:

through setting up the surge tank, can make nitrogen seal valve body open fast or stop, simulate the storage tank work, survey test tube and basin in the cooperation, can detect opening or closing degree of nitrogen seal valve body, and then under the different states of nitrogen seal valve body, observe the reading of manometer one and can obtain opening pressure, closing pressure and the leakage quantity of nitrogen seal valve body, further make the testing process to nitrogen seal valve body simpler and more convenient, detect more fast, and then detection cycle is shorter.

Drawings

Fig. 1 shows a schematic configuration of the opening pressure detection process of the present utility model.

Fig. 2 shows a schematic structural diagram of the closing pressure detection process of the present utility model.

Reference numerals: 1. a storage tank; 2. a nitrogen seal valve body; 3. an air inlet pipe; 31. a valve I; 32. a second pressure gauge; 4. an air outlet pipe; 5. starting and stopping the pipe; 6. a three-way valve; 7. a bypass pipe; 71. a second valve; 72. a surge tank; 721. a third valve; 722. a first pressure gauge; 8. a test tube; 81. a flow meter; 9. a water tank.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

The utility model provides an online detection device for a nitrogen seal valve, which comprises a storage tank 1, wherein a nitrogen seal valve body 2 is arranged above the storage tank 1, an air inlet pipe 3 is communicated with an air inlet end of the nitrogen seal valve body 2, an air source is communicated with the other end of the air inlet pipe 3, the air source is used for supplying nitrogen, an air outlet pipe 4 is communicated with an air outlet end of the nitrogen seal valve body 2, the other end of the air outlet pipe 4 is communicated to the storage tank 1 and is used for filling nitrogen into the storage tank 1, a start-stop pipe 5 is communicated with a start-stop end of the nitrogen seal valve body 2, and the other end of the start-stop pipe 5 is communicated to the storage tank 1.

When the nitrogen content in the storage tank 1 is reduced, the air pressure value in the storage tank 1 is reduced, the valve core of the nitrogen seal valve body 2 is not blocked by the pressure value in the storage tank 1, the valve core of the nitrogen seal valve body 2 is pushed to move, the nitrogen seal valve body 2 is opened, nitrogen supplied by an air source enters the air outlet pipe 4 along the air inlet pipe 3, and the air outlet pipe 4 is supplemented into the storage tank 1 until the air pressure value in the storage tank 1 can be set from the valve core of the nitrogen seal valve body 2, so that the nitrogen seal valve body 2 can be in a closed state.

The three-way valve 6 is arranged on the air outlet pipe 4 and the start-stop pipe 5, the air inlet pipe 3 is communicated with the bypass pipe 7 through a three-way pipe, the other end of the bypass pipe 7 is communicated with the three-way valve 6 on the start-stop pipe 5, the bypass pipe 7 is provided with the valve II 71, the valve II 71 is a stop valve, the bypass pipe 7 is also provided with the surge tank 72, the surge tank 72 is arranged at the downstream of the valve II 71, the surge tank 72 is provided with the first pressure gauge 722 and the air outlet, and the detection probe of the first pressure gauge 722 extends into the surge tank 72 to be used for detecting the air pressure value in the surge tank 72. And a valve III 721 is arranged on the air outlet, and the valve III 721 is a stop valve for pressure relief operation in the surge tank 72.

The three-way valve 6 on the air outlet pipe 4 is communicated with a test tube 8, the other end of the test tube 8 is communicated with a water tank 9, one end of the test tube 8 stretches into the position below the liquid level in the water tank 9, and when air in the air outlet pipe 4 passes through, bubbles can be generated in the water tank 9. The test tube 8 is also provided with a flow meter 81 for detecting the flow of gas in the test tube 8.

The air inlet pipe 3 is provided with a valve I31, the valve I31 is a stop valve, the valve I31 is arranged at the downstream of the tee joint, and the communication between the nitrogen seal valve body 2 and the air source can be cut off by closing the valve I31.

The air inlet pipe 3 is also provided with a second pressure gauge 32, and the second pressure gauge 32 is arranged downstream of the first valve 31 and is used for detecting the pressure value in the air inlet pipe 3.

Opening pressure detection process: firstly, the three-way valve 6 on the air outlet pipe 4 and the start-stop pipe 5 is regulated, the output end of the nitrogen seal valve body 2 is communicated with the test pipe 8, the start-stop end of the nitrogen seal valve body 2 is communicated with the surge tank 72, then the valve III 721 is closed, the valve I31 and the valve II 71 are opened, at the moment, the air pressure in the surge tank 72 is lower, the nitrogen seal valve body 2 is opened, part of nitrogen enters the air outlet pipe 4 along the air inlet pipe 3 and then enters the test pipe 8 through the air outlet pipe 4, the nitrogen is discharged into the water tank 9 through the test pipe 8, air bubbles are generated in the water tank 9, part of nitrogen filled into the air inlet pipe 3 through the air source also enters the surge tank 72 along the bypass pipe 7, the air pressure value in the surge tank 72 is gradually increased, when the air pressure is increased to a certain value, the nitrogen seal valve body 2 is closed, namely no air bubbles are generated in the water tank 9, and the number of the flowmeter 81 is zero.

And secondly, closing the valve II 71 and opening the valve III 721, at the moment, the air source is not inflated into the pressure stabilizing tank 72, nitrogen in the pressure stabilizing tank 72 flows out from the air outlet, the pressure in the pressure stabilizing tank 72 is reduced, when the air pressure is reduced to a certain value, the nitrogen seal valve body 2 is opened, namely, continuous bubbles are generated in the water tank 9, and the pressure value displayed by the pressure gauge I722 at the moment is observed to be the opening pressure of the nitrogen seal valve body 2.

Closing the pressure detection process: after the detection of the opening pressure is completed, the valve III 721 is closed, the valve II 71 is opened until no continuous bubble is generated in the water tank 9, the indication number of the flowmeter 81 is zero, and the pressure value displayed by the pressure gauge I722 at the moment is observed to be the closing pressure of the nitrogen seal valve body 2.

The leakage amount detection process comprises the following steps: after the closing pressure detection is completed, the valve two 71 and the valve three 721 are adjusted to maintain the closing pressure value in the surge tank 72, and the surge tank is kept for a period of time, and whether air bubbles are generated in the water tank 9 is observed to judge whether leakage exists or not, and whether the indication of the flowmeter 81 is changed or not is observed to judge the leakage amount.

In summary, the pressure stabilizing tank 72 is provided in the present utility model, so that the nitrogen seal valve body 2 can be quickly opened or stopped, the operation of the storage tank 1 is simulated, the opening or closing degree of the nitrogen seal valve body 2 can be detected by matching the upper test tube 8 with the water tank 9, further, under different states of the nitrogen seal valve body 2, the opening pressure, closing pressure and leakage amount of the nitrogen seal valve body 2 can be obtained by observing the indication value of the pressure gauge 722, further, the detection process of the nitrogen seal valve body 2 is simpler and more convenient, the detection is quicker, and the detection period is shorter.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model, and in particular, the technical features set forth in the various embodiments may be combined in any manner so long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

In the description of the present utility model, terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate a direction or a positional relationship, are based on the direction or the positional relationship shown in the drawings, are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus/means that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus/means.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims

1. The utility model provides a nitrogen seal valve on-line measuring device, including storage tank (1), be provided with nitrogen seal valve body (2) on storage tank (1), the inlet end, the end of giving vent to anger and the start-stop end of nitrogen seal valve body (2) communicate respectively have intake pipe (3), outlet duct (4) and start-stop pipe (5), the other end intercommunication of intake pipe (3) has the air supply, outlet duct (4) with the other end of starting-stop pipe (5) all with storage tank (1) are linked together, its characterized in that: three-way valves (6) are arranged on the air outlet pipe (4) and the start-stop pipe (5); the air inlet pipe (3) is communicated with the three-way valve (6) on the start-stop pipe (5) through a bypass pipe (7), a valve II (71) and a pressure stabilizing tank (72) are arranged on the bypass pipe (7), the valve II (71) is arranged at the upstream of the pressure stabilizing tank (72), a pressure gauge I (722) and an air outlet are arranged on the pressure stabilizing tank (72), and a valve III (721) is arranged on the air outlet; the three-way valve (6) on the air outlet pipe (4) is communicated with a test pipe (8), the other end of the test pipe (8) is communicated with a water tank (9), and one end of the test pipe (8) stretches into the water tank (9).

2. The nitrogen seal valve on-line detection device according to claim 1, wherein: and a flowmeter (81) is arranged on the test tube (8).

3. The nitrogen seal valve on-line detection device according to claim 1, wherein: the air inlet pipe (3) is provided with a valve I (31).

4. The online detection device for nitrogen-sealed valves according to claim 3, wherein: the air inlet pipe (3) is also provided with a second pressure gauge (32), and the second pressure gauge (32) is arranged at the downstream of the first valve (31).