CN218725029U - Online monitoring system for leakage of equipment pipeline in heat preservation layer - Google Patents
Online monitoring system for leakage of equipment pipeline in heat preservation layer Download PDFInfo
- Publication number
- CN218725029U CN218725029U CN202222960521.4U CN202222960521U CN218725029U CN 218725029 U CN218725029 U CN 218725029U CN 202222960521 U CN202222960521 U CN 202222960521U CN 218725029 U CN218725029 U CN 218725029U
- Authority
- CN
- China
- Prior art keywords
- gas
- pipe
- pipeline
- gas collecting
- valve
- 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 relates to an online monitoring system for pipeline leakage of equipment in a heat preservation layer, which comprises a gas collecting device, a power device and a detection and transmission device. The gas collecting device comprises a plurality of gas collecting pipes, and a plurality of gas inlet small holes are formed in the gas collecting pipes; the gas collecting pipe is communicated with the power device through a main pipe; the detection transmission device is arranged on the main pipe, and the vacuum pump is used for conveying the collected gas to the detection transmission device. The on-line monitoring system for the equipment pipeline leakage in the heat insulation layer can sample and analyze the leakage of the equipment pipeline on the premise of not dismounting the equipment and insulating the pipeline, thereby improving the monitoring capability of the equipment and the pipeline and reducing the safety risk in the use of the equipment.
Description
Technical Field
The utility model relates to an online monitoring system of heat preservation in situ equipment pipeline leakage belongs to industrial equipment, pipeline leakage monitoring analysis field.
Background
In actual production in the petrochemical industry, equipment and pipelines often leak due to the influence of factors such as materials, welding, sealing and corrosion. Because the heat preservation layer is arranged outside the equipment and the pipeline, flammable, explosive, toxic and colorless gaseous media are difficult to discover after leakage, and serious accident potential is hidden.
The traditional detection method is to remove the heat-insulating layer structure and mainly depends on manual visual inspection or timing and fixed-point sampling inspection. Influenced by pipeline length, pipeline quantity, heat preservation leakproofness, personnel skill etc. detection efficiency is low. Demolish heat preservation structural cost higher, be difficult to satisfy the detection and the safety demand of enterprise.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model aims at providing an online monitoring system is leaked to insulation layer in equipment pipeline can be under the prerequisite of not demolising equipment, pipeline heat preservation, take a sample, the analysis to the leakage of equipment pipeline, has improved the monitoring ability of equipment, pipeline, has reduced the safe risk in the equipment use.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an online monitoring system of heat preservation in situ equipment pipeline leakage, include:
the gas collecting device comprises a plurality of gas collecting pipes, a plurality of gas inlet holes are formed in the gas collecting pipes, tail end adjusting valves, first pressure meters and front end cutting valves are further mounted on the gas collecting pipes, the tail end adjusting valves control the pressure in the gas collecting pipes, the first pressure meters indicate the pressure in the gas collecting pipes, and the front end cutting valves adjust the flow of gas in the gas collecting pipes;
the power device comprises a vacuum pump, and the gas collecting pipe is communicated with the vacuum pump through a main pipe;
detect transmission device, it sets up to detect transmission device house steward on, the vacuum pump is used for carrying the gas of collecting detect transmission device, be equipped with house steward trip valve on the house steward.
The gas collecting device further comprises a gas cooling device, a flow meter and a rear-end cut-off valve, wherein the gas inlet end of the gas cooling device is communicated with the gas collecting pipe, the gas outlet end of the gas cooling device is communicated with the header pipe, the flow meter and the rear-end cut-off valve are arranged on a pipeline through which the gas cooling device is communicated with the header pipe, the flow meter indicates the gas flow rate in the gas collecting pipe, and the gas collecting pipe and the header pipe are cut off by the rear-end cut-off valve.
The gas cooling device comprises a gas cooler, the gas cooler comprises a cooling water inlet and a cooling water outlet, the cooling water inlet is communicated with a water inlet pipe, the cooling water outlet is communicated with a water outlet pipe, a water inlet stop valve is arranged on the water inlet pipe, a water outlet stop valve is arranged on the water outlet pipe, the gas inlet end of the gas cooler is communicated with a gas collecting pipe, and the gas outlet end of the gas cooler is communicated with a header pipe.
Detect transmission device includes online analytical instrument, online analytical instrument sets up on the house steward, house steward's trip valve sets up online analytical instrument's import department, gas after the cooling enters into online analytical instrument detects, online analytical instrument sends the result of detecting for showing in the DCS.
The detection and transmission device further comprises a second pressure gauge, the second pressure gauge is arranged on the header pipe and used for indicating the negative pressure in the header pipe, and the negative pressure of the header pipe is lower than that of the gas collecting pipe.
The detection and transmission device further comprises a separation filter, the separation filter is arranged on the header pipe, the bottom of the separation filter is connected with a bottom discharge valve, and the second pressure gauge and the separation filter are arranged on the upstream of the online analysis meter.
The detection and transmission device further comprises a header pipe thermometer, wherein the header pipe thermometer is arranged on the header pipe and is used for detecting the temperature of the gas entering the online analysis meter.
The device still includes the air door, the air door is established on house steward, and is located the entrance point of vacuum pump, the air door is used for adjusting house steward's pressure.
The power device further comprises an outlet air release pipeline, the outlet air release pipeline is connected with an outlet of the vacuum pump, and a pump outlet pipe stop valve is further arranged on the outlet air release pipeline.
The power device further comprises a back purging pipeline, one end of the back purging pipeline is communicated with an outlet of the vacuum pump, the other end of the back purging pipeline is communicated with the gas collecting pipe, and a back purging cut-off valve is arranged on the back purging pipeline.
The power device further comprises an atmosphere communicating valve, the atmosphere communicating valve is installed at the inlet end of the power device and communicated with the atmosphere, and the atmosphere communicating valve provides atmosphere for the return purging pipeline.
And a plurality of air inlets are formed in the same cross section of the gas collecting pipe along the circumferential direction, and are uniformly distributed along the circumferential direction.
The utility model discloses owing to take above technical scheme, it has following advantage:
carry online gas analysis appearance through the vacuum pump with gas in the gas collecting pipe, detect gaseous composition or concentration through online gas analysis appearance, with real-time detection data transmission to DCS monitored control system in, can be under the prerequisite of not demolising equipment, pipeline heat preservation, take a sample, the analysis to the leakage of equipment pipeline, improved the monitoring ability of equipment, pipeline, reduced the safety risk in the equipment use.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a block diagram of the utility model provides an online monitoring system for pipeline leakage of equipment in the heat preservation layer
FIG. 2 is a schematic structural view of an embodiment of an online monitoring system for leakage of equipment pipelines in a heat preservation layer provided by the present invention;
FIG. 3 is a schematic view of a gas collecting tube of the gas collecting device
FIG. 4 is a cross-sectional view of the header;
the reference symbols in the drawings denote the following:
1. a tail end regulating valve; 2. a pressure gauge; 3. a front end shutoff valve; 4. a gas collecting pipe and 41-air inlet holes; 5. a gas cooler; 6. a water inlet shut-off valve; 7. a water outlet shut-off valve; 8. a flow meter; 9. a rear end shutoff valve; 10. a main pipe pressure gauge; 11. a separation filter; 12. a manifold thermometer; 13. a main pipe shut-off valve; 14. An online analytical instrument; 15. a damper; 16. an atmosphere communication valve; 17. an explosion-proof vacuum pump; 18. a blowback cut-off valve; 19. a pump outlet cut-off valve; 20. an emptying pipeline; 21. and returning the purge line.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
An embodiment of the utility model provides an online monitoring system of heat preservation in situ equipment pipeline leakage, including gas collection device, power device and detection transmission device. The gas collecting device comprises a plurality of gas collecting pipes, a plurality of gas inlets are formed in the gas collecting pipes, tail end regulating valves, first pressure meters and front end cut-off valves are further installed on the gas collecting pipes, the tail end regulating valves control the pressure in the gas collecting pipes, the first pressure meters indicate the pressure in the gas collecting pipes, and the tail end regulating valves regulate the flow of gas in the gas collecting pipes; the gas collecting pipe is communicated with the power device through a header pipe; the detection transmission device is arranged on the main pipe, the vacuum pump is used for conveying collected gas to the detection transmission device, and the main pipe is provided with a main pipe cut-off valve. The system for online monitoring of the leakage of the equipment pipeline in the heat insulation layer can sample and analyze the leakage of the equipment pipeline on the premise of not dismantling the equipment and maintaining the heat of the pipeline, thereby improving the monitoring capability of the equipment and the pipeline and reducing the safety risk in the use of the equipment.
Example 1
As shown in fig. 1 and fig. 2, the system for online monitoring of equipment pipeline leakage in the thermal insulation layer comprises a gas collecting device, a power device and a detection transmission device. The gas collecting device comprises a plurality of gas collecting pipes 4, a plurality of gas inlet holes 41 are formed in the gas collecting pipes 4, tail end adjusting valves 1, first pressure gauges 2 and front end cutting valves 3 are further installed on the gas collecting pipes 4, the tail end adjusting valves 1 control the pressure in the gas collecting pipes 4, the first pressure gauges 2 indicate the pressure in the gas collecting pipes 4, and the tail end adjusting valves 1 adjust the flow of gas in the gas collecting pipes 4; the power device comprises a vacuum pump 17, and the gas collecting pipe 4 is communicated with the vacuum pump 17 through a main pipe; the detection transmission device is arranged on the main pipe, the vacuum pump 17 is used for conveying collected gas to the detection transmission device, and the main pipe is provided with a main pipe cut-off valve 13.
The online monitoring system for equipment pipeline leakage in the heat preservation layer conveys gas in the gas collecting pipe 4 to the detection transmission device through the power device, detects gas components or concentration through the detection transmission device, transmits real-time detection data to the DCS monitoring system, can sample and analyze the leakage of the equipment pipeline on the premise of not dismantling the equipment and the pipeline heat preservation, improves the monitoring capability of the equipment and the pipeline, and reduces the safety risk in the use of the equipment.
The gas collecting device further comprises a gas cooling device, a flow meter 8 and a rear-end cut-off valve 9, the gas inlet end of the gas cooling device is communicated with the gas collecting pipe 4, the gas outlet end of the gas cooling device is communicated with the header pipe, the flow meter 8 and the rear-end cut-off valve 9 are arranged on a pipeline communicated with the gas cooling device and the header pipe, the flow meter 8 indicates the gas flow rate in the gas collecting pipe 4, and the rear-end cut-off valve 9 cuts off the gas collecting pipe 4 and the header pipe.
The gas cooling device comprises a gas cooler 5, cooling medium is water-cooled, the gas cooler 5 comprises a cooling water inlet and a cooling water outlet, the cooling water inlet is communicated with a water inlet pipe, the cooling water outlet is communicated with a water outlet pipe, a water inlet stop valve 6 is arranged on the water inlet pipe, a water outlet stop valve 7 is arranged on the water outlet pipe, the gas inlet end of the gas cooler 5 is communicated with a gas collecting pipe 4, and the gas outlet end is communicated with a header pipe.
Detect transmission device includes on-line analysis instrument 14, on-line analysis instrument 14 sets up on the house steward, house steward trip valve 13 sets up on-line analysis instrument 14's import department, the gas after the cooling enters into on-line analysis instrument 14 detects, on-line analysis instrument 14 sends the result of detecting for showing in the DCS.
The gas collecting pipe 2 is installed outside the industrial equipment and pipeline with heat insulating interlayer, and the inner medium is gas phase or inflammable, explosive and toxic gas phase medium which is flash evaporated and volatilized into gas phase after leakage. The gas in the gas collecting pipe 4 is conveyed to an online gas analyzer 14 through a vacuum pump 17, the gas components or the gas concentration are detected through the analyzer, and the real-time detection data are transmitted to a DCS monitoring system. The gas composition or concentration sets an alarm value. The monitoring personnel can immediately find the leakage phenomenon and then specifically check and position the leakage phenomenon in a targeted manner.
The detection and transmission device further comprises a second pressure gauge 10, the second pressure gauge 10 is arranged on the header pipe, the second pressure gauge 10 is used for indicating the negative pressure in the header pipe, and the negative pressure of the header pipe is lower than that of the gas collecting pipe 4.
The detection and transmission device further comprises a separation filter 11, the separation filter 11 is arranged on the header pipe, the bottom of the separation filter 11 is connected with a bottom discharge valve, and the second pressure gauge 10 and the separation filter 11 are both arranged on the upstream of the online analysis meter 14. A filter screen is arranged in the separation filter 11, a certain amount of condensate can be stored at the bottom of the filter, and a discharge valve is arranged at the bottom of the filter and can be used for discharging the condensate.
The test transfer device also includes a manifold thermometer 12, the manifold thermometer 12 being disposed on the manifold, the manifold thermometer 12 being configured to detect the temperature of the gas entering the meter of the online analyzer 14.
The power device further comprises a damper 15, the damper 15 is arranged on the main pipe and is located at the inlet end of the vacuum pump 17, and the damper 15 is used for adjusting the pressure of the main pipe.
The power device further comprises an outlet air release pipeline 20, the outlet air release pipeline 20 is connected with an outlet of the vacuum pump 17, and a pump outlet pipe cut-off valve 19 is further arranged on the outlet air release pipeline 17.
The power device further comprises a back purging pipeline 21, one end of the back purging pipeline 21 is connected with an outlet of the vacuum pump 17, the other end of the back purging pipeline 21 is connected with the gas collecting pipe 4, and a back purging cut-off valve 18 is arranged on the back purging pipeline 21.
The power device further comprises an atmosphere communication valve 16, the atmosphere communication valve 16 is installed at the inlet end of the power device, the atmosphere communication valve 16 is communicated with the atmosphere, and the return purge line 21 provides the atmosphere.
As shown in fig. 3 and 4, a plurality of air inlet holes 41 are formed in the same cross section of the gas collecting pipe 4 along the circumferential direction, and the plurality of air inlet holes 41 are uniformly distributed along the circumferential direction. The intake holes 41 may be arranged in a plurality of rows. Preferably, the air inlet holes 41 are distributed in three at 180 degrees, so that the air collection reliability can be ensured.
The in-situ equipment pipeline leakage online monitoring system for the heat preservation layer comprises:
the gas collecting device is arranged on the outer wall of equipment or a pipeline in the heat-insulating layer, micro negative pressure is arranged in the gas collecting pipe 4, gas in the equipment or the pipeline heat-insulating layer enters the gas collecting pipe through the gas inlet 41, the gas flow in the gas collecting pipe is controlled by the opening of the front end cut-off valve 3, the pressure in the gas collecting pipe is indicated by the pressure gauge 2, and the pressure in the gas collecting pipe can be controlled by the tail end regulating valve 1.
The gas in the gas collecting pipe is cooled to a proper temperature through the cooler 5, the cooling medium of the cooler is circulating water, a cooling water inlet cut-off valve 6 and a cooling water outlet cut-off valve 7 are arranged, and the amount of cooling water and the temperature of the gas can be adjusted according to the temperature condition. The cooled gas enters the flowmeter 8 to indicate the gas circulation rate in the gas collecting pipe, and the rear-end cut-off valve 9 can cut off the gas collecting pipe 4 from the main pipe.
The pressure of the main pipe at the inlet of the vacuum pump 17 is indicated by a pressure gauge 10, and the negative pressure of the main pipe is lower than that of a pressure gauge 2 of the gas collecting pipe. The collected gas phase may have impurities or condensed water after cooling, and is separated and filtered by the separation filter 11, and the impurities and the condensed water can be discharged through a bottom discharge valve. The header pipe is provided with a thermometer 12 which can judge the effect of the cooler and prevent the analysis instrument from being influenced by overhigh temperature. And gas enters the online board separation instrument 14 through the main pipe shut-off valve 13, and the analysis result is transmitted to the DCS for display.
The inlet of the explosion-proof vacuum pump 17 is controlled by a damper 15, the pressure of the main pipe can be adjusted, and gas is pumped out of the system by the vacuum pump and is discharged by an outlet air discharge pipeline 20. In order to prevent the small holes of the gas collecting pipeline from being blocked, the system can realize on-line reverse purging, open the pump inlet bypass valve 16, close the main pipe shut-off valve 13, the reverse purging shut-off valve 18 and close the pump outlet pipe shut-off valve 19, so that air can flow reversely, and the problem that foreign matters block gas collecting holes is solved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (12)
1. The utility model provides an equipment pipeline in heat preservation leaks on-line monitoring system which characterized in that includes:
the gas collecting device comprises a plurality of gas collecting pipes, a plurality of gas inlet holes are formed in the gas collecting pipes, tail end adjusting valves, first pressure meters and front end cutting valves are further mounted on the gas collecting pipes, the tail end adjusting valves control the pressure in the gas collecting pipes, the first pressure meters indicate the pressure in the gas collecting pipes, and the front end cutting valves adjust the flow of gas in the gas collecting pipes;
the power device comprises a vacuum pump, and the gas collecting pipe is communicated with the vacuum pump through a main pipe;
detect transmission device, it sets up to detect transmission device house steward on, the vacuum pump is used for carrying the gas of collecting detect transmission device, be equipped with house steward trip valve on the house steward.
2. The system for on-line monitoring of pipeline leakage of equipment in a thermal insulation layer according to claim 1, wherein the gas collecting device further comprises a gas cooling device, a flow meter and a rear-end cut-off valve, a gas inlet end of the gas cooling device is communicated with the gas collecting pipe, a gas outlet end of the gas cooling device is communicated with the header pipe, the flow meter and the rear-end cut-off valve are arranged on a pipeline through which the gas cooling device is communicated with the header pipe, the flow meter indicates the gas flow rate in the gas collecting pipe, and the rear-end cut-off valve cuts off the gas collecting pipe from the header pipe.
3. The insulation layer in-plant pipeline leakage on-line monitoring system of claim 2, wherein the gas cooling device comprises a gas cooler, the gas cooler comprises a cooling water inlet and a cooling water outlet, the cooling water inlet is communicated with a water inlet pipe, the cooling water outlet is communicated with a water outlet pipe, a water inlet cut-off valve is arranged on the water inlet pipe, a water outlet cut-off valve is arranged on the water outlet pipe, the gas inlet end of the gas cooler is communicated with the gas collecting pipe, and the gas outlet end is communicated with the header pipe.
4. The system for online monitoring of leakage of equipment pipelines in a heat preservation layer according to claim 1, wherein the detection transmission device comprises an online analysis meter, the online analysis meter is arranged on the main pipe, the main pipe shut-off valve is arranged at an inlet of the online analysis meter, cooled gas enters the online analysis meter to be detected, and the online analysis meter sends a detection result to the control system to be displayed.
5. The system for on-line monitoring of equipment pipeline leakage in a thermal insulation layer according to claim 4, wherein the detection transmission device further comprises a second pressure gauge, the second pressure gauge is arranged on the header pipe and used for indicating the negative pressure in the header pipe, and the negative pressure of the header pipe is lower than the negative pressure of the gas collecting pipe.
6. The system for online monitoring of equipment pipeline leakage in an insulation layer according to claim 5, wherein the detection transmission device further comprises a separation filter, the separation filter is arranged on the main pipe, a bottom discharge valve is connected to the bottom of the separation filter, and the second pressure gauge and the separation filter are both arranged upstream of the online analysis meter.
7. The in-situ equipment pipeline leak online monitoring system of claim 6, wherein the detection transmission device further comprises a manifold thermometer, the manifold thermometer being disposed on the manifold, the manifold thermometer being configured to detect the temperature of the gas entering the online analytical instrument.
8. The in-situ insulation equipment pipeline leakage monitoring system according to claim 1, wherein the power device further comprises a damper, the damper is arranged on the main pipe and is located at the inlet end of the vacuum pump, and the damper is used for adjusting the pressure of the main pipe.
9. The in-situ insulation equipment pipeline leakage online monitoring system according to claim 8, wherein the power device further comprises an outlet air release pipeline, the outlet air release pipeline is connected with an outlet of the vacuum pump, and a pump outlet pipe shut-off valve is further arranged on the outlet air release pipeline.
10. The system for online monitoring of equipment pipeline leakage in a heat preservation layer according to claim 9, wherein the power plant further comprises a back purging pipeline, one end of the back purging pipeline is communicated with an outlet of the vacuum pump, the other end of the back purging pipeline is communicated with the gas collecting pipe, and a back purging cut-off valve is arranged on the back purging pipeline.
11. The system for online monitoring of equipment pipeline leakage in a heat preservation layer according to claim 10, wherein the power plant further comprises an atmosphere communication valve, the atmosphere communication valve is installed at an inlet end of the power plant, and the atmosphere communication valve is communicated with atmosphere to provide atmosphere for the return purge pipeline.
12. The system for on-line monitoring of pipeline leakage of equipment in an insulation layer according to claim 1, wherein a plurality of air inlet holes are circumferentially arranged on the same cross section of the gas collecting pipe, and the plurality of air inlet holes are circumferentially and uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222960521.4U CN218725029U (en) | 2022-11-08 | 2022-11-08 | Online monitoring system for leakage of equipment pipeline in heat preservation layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222960521.4U CN218725029U (en) | 2022-11-08 | 2022-11-08 | Online monitoring system for leakage of equipment pipeline in heat preservation layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218725029U true CN218725029U (en) | 2023-03-24 |
Family
ID=85609088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222960521.4U Active CN218725029U (en) | 2022-11-08 | 2022-11-08 | Online monitoring system for leakage of equipment pipeline in heat preservation layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218725029U (en) |
-
2022
- 2022-11-08 CN CN202222960521.4U patent/CN218725029U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7454956B1 (en) | Heat exchanger leak detection using mass gas flow metering | |
| WO2023087732A1 (en) | System for locating leakage position of condenser heat exchange tube, and method | |
| CN106442890A (en) | Multichannel rapid air changing double-pump type gas detecting device | |
| CN102589811A (en) | Method and system for detecting interior leakage of heat exchanger | |
| CN111855112B (en) | Heat exchanger leakage detection system and detection method | |
| CN106323561A (en) | Cooler on-line leakage detection system | |
| CN101509822B (en) | Light organic petrochemicals water cooler leakage on-line monitoring method and instrument | |
| CN210774922U (en) | Dew point meter with sampling system | |
| CN106969946B (en) | Condensate sampling method and device for detecting leakage of condenser | |
| CN218725029U (en) | Online monitoring system for leakage of equipment pipeline in heat preservation layer | |
| CN110174483A (en) | A kind of total organic carbon high temperature detection pretreatment system in steam | |
| CN106872223B (en) | A kind of flue gas monitoring system multidraw method | |
| CN202501959U (en) | Detection system of internal leak of heat exchanger | |
| CN211234865U (en) | Online leak detector | |
| CN210090387U (en) | High-temperature detection pretreatment system for total organic carbon in steam | |
| CN204788835U (en) | Online leak detection system of cooler | |
| GB2558906A (en) | Improved metering systems and methods | |
| CN206055212U (en) | The leak detection system and jet chimney of jet chimney | |
| CN210079272U (en) | Device for online monitoring leakage of fine processing powder resin | |
| CN221470781U (en) | System for preventing icing and blocking of flame arrester | |
| CN209961778U (en) | Crude oil real-time on-line monitoring system | |
| CN220960512U (en) | Broken pipe leakage control system of front module heat exchanger | |
| CN210464589U (en) | Stator cooling water tank leaks hydrogen detection device | |
| CN220625890U (en) | Coke oven gas closed circulation sampling device | |
| CN216350634U (en) | Torch waste gas monitoring and pretreatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |