CN216669182U - Main line valve internal leakage detection device and circumferential weld repair operation system - Google Patents
Main line valve internal leakage detection device and circumferential weld repair operation system Download PDFInfo
- Publication number
- CN216669182U CN216669182U CN202123394623.6U CN202123394623U CN216669182U CN 216669182 U CN216669182 U CN 216669182U CN 202123394623 U CN202123394623 U CN 202123394623U CN 216669182 U CN216669182 U CN 216669182U
- Authority
- CN
- China
- Prior art keywords
- valve
- detection device
- internal leakage
- trunk
- cut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model provides a main line valve internal leakage detection device and a circumferential weld repair operation system. The main valve internal leakage detection device comprises a valve blowdown connector, a first cut-off valve, a double-valve group and a pressure gauge which are sequentially arranged on a detection pipeline. The valve sewage draining joint is connected with the valve sewage draining valve port and can be changed in size according to the valve sewage draining valve port. The first cut-off valve, the double valve group and the pressure gauge are sequentially connected behind the valve blowdown connector; and (4) quantifying the internal leakage of the valve by calculation. The girth weld repair work system includes: the valve internal leakage detection device comprises an emptying unit, a fire working unit and a judgment unit, wherein the judgment unit is configured to judge whether the emptying unit carries out emptying operation or not and whether the fire working unit carries out fire working or not according to the internal leakage amount detected by the valve internal leakage detection device. The utility model provides a pressure detection device for detecting the internal leakage condition of a valve, which has a simple structure and is simple and convenient to operate.
Description
Technical Field
The utility model relates to the field of pipeline oil and gas transmission, in particular to a gas-liquid linkage valve internal leakage detection device and a circumferential weld repair operation system.
Background
The valve is an important device in petrochemical production, and in current practical application, the condition of internal leakage of the valve often occurs, so that the product quality is influenced, the safety of petrochemical production is influenced, and environmental influences can be caused. The valve can be replaced when the internal leakage is solved, but the cost of replacing one valve and plugging is very high, namely one or two million valves are frequently replaced, and the cost is too high; the detection devices on the market are also expensive to purchase. At present, the method for detecting the internal leakage of the valve at home and abroad comprises the following steps: the acoustic emission detection method, the ultrasonic detection method, the vibration detection method and the temperature method are greatly influenced by environmental factors, the application range is limited, and the implementation in practice is difficult.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a trunk valve internal leakage detection device and a circumferential weld repair operation system, so as to realize quantitative detection of valve internal leakage and judge a subsequent operation plan according to the detected internal leakage.
The utility model provides a main line valve internal leakage detection device, which comprises a valve blowdown connector, a first cut-off valve, a double-valve group and a pressure gauge, wherein the valve blowdown connector, the first cut-off valve, the double-valve group and the pressure gauge are sequentially arranged on a detection pipeline; the first shut-off valve has a first open position in which the flow passage of the detection line is shut off and a first shut-off position in which the flow passage of the detection line is open; the double-valve group comprises a second cut-off valve and an air release valve, the second cut-off valve is provided with a second opening position and a second cut-off position, the second cut-off position is arranged on the second opening position, the flow channel of the detection pipeline is cut off, the second opening position is arranged on the second opening position, the flow channel of the detection pipeline is opened, and the air release valve is located at the downstream of the second cut-off valve according to the flowing direction of media.
Optionally, the valve waste fitting is removably connected between the main valve and the first shut off valve.
Optionally, the aperture of the valve blowdown connector matches the aperture of the main valve blowdown port.
Alternatively, the first shut-off valve may be a needle valve.
Optionally, the outer surface of one end of the valve contamination discharging connector is provided with external threads, and the other end of the valve contamination discharging connector is connected with the first cut-off valve through threads.
Alternatively, the pressure gauge may include: the shell wraps the pressure guide system, the gear transmission mechanism, the connecting rod and the number indicating unit, wherein the pressure guide system is connected with the gear transmission mechanism and then connected with the number indicating unit through the connecting rod, and the shell is provided with an overflow hole.
Optionally, the emptying valve can be connected with a pressure guiding pipe.
Alternatively, the main valve may be a gas-liquid linkage valve.
Optionally, the material used for the valve drain connector can be stainless steel, cast steel or carbon steel.
In another aspect, the present invention provides a circumferential weld repairing system, including: the emptying unit is used for emptying the natural gas pipeline; the fire unit is used for carrying out fire repairing operation on the natural gas pipeline; a trunk valve internal leak detection device as described above; and the judging unit is configured to judge whether the emptying unit carries out emptying operation or not and whether the firing unit carries out firing operation or not according to the internal leakage amount detected by the main valve internal leakage detection device.
Compared with the prior art, the utility model has the beneficial effects that: the structure is simple, the operation is simple and convenient, and the application range is wide; the interface is replaceable, and the valve leak detection device is used for detecting the internal leakage conditions of various valves, so that the cost is reduced; the pressure gauge quantitatively detects the pressure and then calculates the inner leakage, and the accuracy is improved.
Drawings
FIG. 1 is a schematic view of a leak detection device in a trunk valve according to an exemplary embodiment of the present invention.
Description of reference numerals:
1-valve pollution discharge joint, 2-first cut-off valve, 3-double valve group, 301-second cut-off valve, 302-emptying valve and 4-pressure gauge.
Detailed Description
The present invention will be better understood by those skilled in the art from the following detailed description of the utility model, taken in conjunction with the accompanying drawings and specific embodiments.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In recent years, the circumferential weld repairing operation is more and more, and before the operation, the related natural gas pipeline needs to be emptied and then the operation of firing is carried out. However, the shut-off valve of the main line often has internal leakage in different degrees, but the internal leakage amount cannot be quantified, and a decision basis cannot be provided for a fire operation plan.
In order to solve the problem that the valve internal leakage measurement cannot be quantized when a fire is fired in a long-distance pipeline and to decide the emptying rate, the utility model researches a novel valve internal leakage detection device, and has important significance for improving the production safety, quantitatively detecting the internal leakage condition, providing decision basis for subsequent operation plans, reducing the production cost and the like.
In an exemplary embodiment, a main valve internal leakage detection device is provided, the detection device comprises a valve blowdown connector, a first block valve, a double valve group and a pressure gauge which are arranged on a detection pipeline in sequence, wherein the valve blowdown connector is connected to a main valve; the first shut-off valve has a first open position in which the flow passage of the detection line is shut off and a first shut-off position in which the flow passage of the detection line is open; the double-valve group comprises a second cut-off valve and an air release valve, the second cut-off valve is provided with a second opening position and a second cut-off position, the second cut-off position is used for cutting off the flow channel of the detection pipeline, the second opening position is used for opening the flow channel of the detection pipeline, and the air release valve is located at the downstream of the second cut-off valve in the medium flowing direction.
According to the detection device, the valve internal leakage amount is obtained by detecting the numerical value change of the pressure gauge at the opening. The detection process mainly comprises the steps of opening a valve blow-down valve, opening a double-valve-group stop valve and closing an emptying valve, observing the numerical value change of a pressure gauge in a certain time, and calculating the internal leakage flow, so that the size of the internal leakage flow is calculated.
FIG. 1 is a schematic view of a leak detection device in a trunk valve according to an exemplary embodiment of the present invention. As shown in fig. 1, in an exemplary embodiment, the main valve internal leakage detection device is used for detecting the internal leakage condition of a main valve, and the main valve (not shown) can be a gas-liquid linkage valve. The detection device comprises a valve blowdown connector 1, a first cut-off valve 2, a double valve group 3 and a pressure gauge 4 which are sequentially arranged on a detection pipeline.
The aperture of the valve pollution discharge joint 1 is matched with the aperture of the vent of the main valve. The material used for the valve pollution discharge joint can be stainless steel, cast steel or carbon steel.
A valve blowdown fitting 1 is removably connected between the main valve and a first block valve 2. For example, the valve waste fitting 1 is connected to the drain of the main valve by a threaded connection. In this embodiment, the outer surface of one end of the valve contamination discharging joint 1 is provided with an external thread, and the other end is connected with the first cut-off valve 2 through a thread. The valve sewage draining joint 1 can be changed into different sizes according to the model and the size of the valve sewage draining valve port, and is suitable for valve sewage draining outlets of various models.
The other end of the valve fitting 1 is connected to a first shut-off valve 2, which has a first open position in which the flow passage of the test line is shut off and a first shut-off position in which the flow passage of the test line is open. The test line may be a pipe made of stainless steel, cast steel, carbon steel, and the like.
In the embodiment, the first cut-off valve is a needle valve which can bear higher pressure than other types of valves, and has the advantages of convenience in mounting and dismounting, fastening connection, convenience in fire prevention and explosion prevention, high pressure resistance, good sealing performance and the like; the needle valve is used together with a pressure gauge 4, and is generally used for sealing gas or liquid medium with smaller flow and higher pressure.
The double valve block may comprise a second shut-off valve 301, which has a second open position, in which the flow channel of the test line is shut off, and a second shut-off position, in which the flow channel of the test line is opened, and a blow valve 302, which is located downstream of the second shut-off valve in the direction of flow of the medium.
The emptying valve 302 can be connected with a pressure guiding pipe for discharging gas and liquid with pressure after detection, so that accidents are avoided.
The double-valve group 3 is matched with a pressure gauge for use, and is used for connecting a process end with an instrument, so that gas-liquid contact with the instrument is avoided, multiple paths are provided for the instrument, installation workload is reduced, and system reliability is improved.
The pressure gauge connected with the double valve group 3 is used for observing the change of pressure in a certain time. The pressure gauge may include: the device comprises a shell, a pressure guide system, a gear transmission mechanism, a connecting rod and a number indicating unit. The pressure guide system, the gear transmission mechanism, the connecting rod and the number indicating unit are arranged in the shell. The pressure guide system is connected with the gear transmission mechanism and then connected with the number indicating unit through a connecting rod, and an overflow hole is formed in the shell. However, the present invention is not limited thereto, and a commonly used or commercially available pressure gauge may be used.
The detection process mainly comprises the steps of connecting the valve sewage connector 1 with the valve sewage valve port and recording the numerical value of the pressure gauge, wherein the use and operation steps of the main valve internal leakage detection device are as follows:
in the first step, all valves of the leak detection device in the main valve are checked to be in a closed state.
And secondly, opening the needle valve to enable gas and liquid to flow in the channel, and slowly opening the double-valve-group block valve.
And thirdly, observing the change of the value of the pressure gauge 4 after a period of time.
And fourthly, calculating the magnitude of the internal leakage flow by using a calculation formula according to the numerical value change.
And step five, closing the needle valve and the second stop valve 301, and opening the emptying valve 302 to empty.
The quick connector of the inner leakage detection device is provided with two cut-off valves and one emptying valve, so that the inner leakage detection device is convenient and safe; the valve blowdown connector at the foremost end of the quick connector can replace connectors of various valves with different sizes for use of emptying ports with different pipe diameters.
And quantifying the internal leakage amount by calculation of a calculation formula.
Here, the leakage amount can be calculated by equations (1) and (2).
The standard volume can be calculated as follows (1):
in formula (1): vn represents the standard volume; v represents the pipe volume; pabs stands for standard pressure; pn represents the pressure measured by the pressure gauge; tn represents the standard temperature; t represents the measured temperature; t represents an absolute temperature; a Zn standard compression factor; z represents a compression factor.
Calculation of leakage amount:
leak is measured in standard volume/measurement time.
For example, after three days of fire remains after two weld defects of a pipeline in a certain place are changed, the main line block valve of a certain valve chamber has internal leakage through detection, but the internal leakage amount cannot be quantified, and whether a large amount of air is emptied is always discussed. And finally, the valve internal leakage detection device is put into use one day before the fire, and by detecting the internal leakage amount, the result meets the fire-making requirement, the natural gas emptying cost is saved by 74 ten thousands of standards, and a basis is provided for the fire-making scheme decision.
For example: and (3) testing the leakage in the valve chamber: the standard volume 3.578610136M can be obtained by the formula according to the parameters of the tube volume 0.549135776M3, the temperature 16 ℃, the current pressure 0.55MPa, the compression factor 0.996, the measurement time 10min and the like3And leakage 21.4716609M3/h。
In another exemplary embodiment, there is also provided a girth weld repair work system, including: the device comprises an emptying unit, a firing unit, a judging unit and the main valve internal leakage detection device.
Wherein, the unloading unit is used for unloading the natural gas pipeline. The fire unit is used for carrying out fire repairing operation on the natural gas pipeline. The judging unit is configured to judge whether the emptying unit performs emptying operation or not and whether the firing unit performs firing operation or not according to the inner leakage amount detected by the main valve inner leakage detecting device.
The utility model provides a valve internal leakage detection device of a pressure trunk valve, which is used for detecting the internal leakage condition of the valve, quantifying the internal leakage quantity of the valve during the operation of firing and saving the air release quantity to provide a basis.
The pressure trunk valve inner leakage detection device is simple in structure, simple and convenient to operate and wide in application range; the interface is replaceable, and the valve leak detection device is used for detecting the internal leakage conditions of various valves, so that the cost is reduced; the pressure gauge quantitatively detects the pressure and then calculates the inner leakage, and the accuracy is improved. The device is suitable for testing the gas-liquid linkage valve, can effectively measure and calculate the internal leakage of the valve so as to judge whether the internal leakage is serious, and provides a basis for subsequent operation plans.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. The main valve inner leakage detection device is characterized by comprising a valve blowdown connector, a first cut-off valve, a double-valve group and a pressure gauge which are sequentially arranged on a detection pipeline, wherein,
the valve blowdown fitting is connected to a trunk valve;
the first shut-off valve has a first open position in which the flow passage of the detection line is shut off and a first shut-off position in which the flow passage of the detection line is open;
the double-valve group comprises a second cut-off valve and an air release valve, the second cut-off valve is provided with a second opening position and a second cut-off position, the second cut-off position is used for cutting off the flow channel of the detection pipeline, the second opening position is used for opening the flow channel of the detection pipeline, and the air release valve is located at the downstream of the second cut-off valve in the medium flowing direction.
2. The trunk valve internal leak detection device of claim 1, wherein the valve blowdown fitting is removably connected between the trunk valve and the first shut-off valve.
3. The trunk valve internal leakage detection device of claim 2, wherein the aperture of the valve blowdown fitting matches the aperture of the main valve blowdown port.
4. The trunk valve internal leak detection device of claim 2, wherein the first shut-off valve is a needle valve.
5. The trunk valve internal leakage detection device of claim 3, wherein the valve waste fitting has an external thread on an outer surface at one end and is threadably connected to the first shut-off valve at the other end.
6. The trunk valve internal leak detection device of claim 1, wherein the pressure gauge comprises: the device comprises a shell, a pressure guide system, a gear transmission mechanism, a connecting rod and a number indicating unit, wherein the pressure guide system is connected with the gear transmission mechanism and then connected with the number indicating unit through the connecting rod, and an overflow hole is formed in the shell.
7. The trunk valve internal leakage detection device of claim 1, wherein a pressure-introducing pipe is connected to the blow-down valve.
8. The trunk valve internal leakage detection device of claim 5, wherein the valve waste fitting is made of stainless steel, cast steel, or carbon steel.
9. The device of any one of claims 1 to 8, wherein the main valve is a gas-liquid linkage valve.
10. A girth weld repair work system, comprising:
the emptying unit is used for emptying the natural gas pipeline;
the fire unit is used for carrying out fire repairing operation on the natural gas pipeline;
a trunk valve internal leak detection arrangement as claimed in any one of claims 1 to 9;
and the judging unit is configured to judge whether the emptying unit carries out emptying operation or not and whether the firing unit carries out firing operation or not according to the internal leakage amount detected by the detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123394623.6U CN216669182U (en) | 2021-12-30 | 2021-12-30 | Main line valve internal leakage detection device and circumferential weld repair operation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123394623.6U CN216669182U (en) | 2021-12-30 | 2021-12-30 | Main line valve internal leakage detection device and circumferential weld repair operation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216669182U true CN216669182U (en) | 2022-06-03 |
Family
ID=81798728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123394623.6U Active CN216669182U (en) | 2021-12-30 | 2021-12-30 | Main line valve internal leakage detection device and circumferential weld repair operation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216669182U (en) |
-
2021
- 2021-12-30 CN CN202123394623.6U patent/CN216669182U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022267075A1 (en) | Pipe pressure resistance testing device and testing method thereof | |
| CN113720555B (en) | Detection device and method for oil and gas pipeline ball valve internal leakage | |
| CN201083590Y (en) | High-temperature high pressure helium-leakage detecting apparatus | |
| CN102072406A (en) | Device and method for detecting product pipeline leakage condition | |
| CN105067509A (en) | Crude oil storage tank corrosion monitoring device | |
| US20100064778A1 (en) | Testing apparatus and method for valves | |
| CN216669182U (en) | Main line valve internal leakage detection device and circumferential weld repair operation system | |
| CN113465843A (en) | Equipment and method for detecting tightness of ship pipeline system | |
| CN219348116U (en) | Air cooler tube bundle finned tube leak detection device | |
| CN113740004A (en) | Valve internal leakage rate evaluation device and evaluation grade method | |
| CN117007252A (en) | Ultrasonic water meter pipe section tightness detection method | |
| CN209117139U (en) | Water flow standard apparatus | |
| CN214040539U (en) | Heat exchange tube leak detection device | |
| CN107462509A (en) | A kind of perm-plug method rock core grasping system suitable for more specification Oil in Super-low Permeability rock cores | |
| CN210571763U (en) | On-spot withstand voltage detection device of PE pipe for gas | |
| CN209821181U (en) | Dissolved oxygen sensor test device | |
| CN113155671A (en) | Measuring method of continuous automatic measuring and sampling device for density and pH value of slurry of desulfurization absorption tower | |
| CN220749220U (en) | Window detection mechanism and emergency cut-off valve | |
| CN210765367U (en) | Blast furnace stave water pipe leak hunting device | |
| CN111750936A (en) | Differential pressure flowmeter metering device | |
| CN220603014U (en) | Solvent steel bottle sampling device and sampling mechanism | |
| CN217878236U (en) | Oil flow pipeline pressure testing and purging device | |
| CN210513681U (en) | Automatic control test bed equipment for detecting valve full performance | |
| CN217442796U (en) | Pressure testing device for heat exchanger | |
| CN211344206U (en) | Pipeline valve leakage detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |