Sealing performance detection device for dry gas sealing element

Abstract

The utility model discloses a sealing performance detection device for a dry gas sealing element, which comprises a sealing gas simulation part, an isolation gas simulation part, a detection tool and an analysis detection part, quick-release interfaces are arranged outside the detection tool and are respectively communicated with the sealing end of the to-be-detected sealing element, the isolation gas inlet and the sealing gas outlet, and the corresponding quick-release interfaces are respectively connected with the sealing gas simulation part, the isolation gas simulation part and the analysis detection part. The discharging environment of the isolation gas needing to be discharged is simulated as much as possible, extra pressure basically does not exist outside, meanwhile, the used isolation gas can be collected and detected, the detection result is accurate, a test can be conducted by replacing corresponding tools to achieve sealing of all ports, the cost of test equipment is reduced, and the test efficiency is improved. The gas storage tank is arranged to store the sealing gas and the isolation gas, and the simulation of the used gas can be realized only by replacing the gas storage tank according to different sealing gases and isolation gases.

Description

Technical Field

[0001] The utility model belongs to the technical field of dry gas sealing detection, and in particular relates to a sealing performance detection device for a dry gas sealing component. Background Art

[0002] The dry gas seal is a new type of non-contact seal developed through fundamental improvements to mechanical seals based on gas hydrodynamic bearings. It essentially achieves non-contact operation of the seal face by adding hydrodynamic grooves to the mechanical seal's dynamic ring and installing a corresponding auxiliary system. It is primarily used in pipelines, offshore platforms, refineries, and the petrochemical industry, and is suitable for any gas transportation system. Because dry gas seals are non-contact seals and are largely unrestricted by PV values, they are particularly suitable as shaft seals for large centrifugal compressors operating under high-speed and high-pressure conditions. The advent of dry gas seals represents a revolution in sealing technology, resolving the challenges of gas sealing, eliminating the need for sealing lubricants. Furthermore, the required gas control system is much simpler than the oil system of oil film seals.

[0003] Dry gas seals organically combine dry gas sealing technology with the principle of blocking seals. The principle of using sealing liquid or sealing gas can ensure that any sealing medium can achieve zero leakage. This makes dry gas seals have a wide range of application prospects in the field of pump shaft seals.

[0004] However, existing dry gas seals need to undergo gas sealing performance tests before leaving the factory. There are few existing testing equipment, and there are actually many models and different applicable scenarios for testing. Therefore, the equipment required for sealing tests requires specially designed corresponding testing equipment, which causes inconvenience in testing and high cost. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies, the inventor of the present invention has continuously reformed and innovated through long-term exploration and attempts, multiple experiments and efforts, and proposed a sealing performance detection device for dry gas seals, which uses an air bag to collect the isolation gas after use, simulates the emission environment of the isolation gas that needs to be discharged as much as possible, so that there is basically no additional pressure on the outside, and can also collect and detect the isolation gas after use, with accurate test results. The dry gas seal to be tested is installed using a detection tool, and using a quick-release interface, it is only necessary to replace the corresponding tool to achieve the sealing of each port of the dry gas seal for testing. The cost of the test equipment is reduced, and only the corresponding tool needs to be designed. A gas storage tank is set to store the sealing gas and isolation gas. For different sealing gases and isolation gases, it is only necessary to replace the gas storage tank to achieve the simulation of the use of gas, and the corresponding pressure is simulated by adjusting the pressure reducing valve and reading the data with the pressure gauge. A vacuum equipment is set to discharge the residual gas or air in the pipeline, which is convenient for eliminating interference and achieving a good simulation experimental environment.

[0006] To achieve the above-mentioned objectives, the present invention employs a technical solution: providing a dry gas seal sealing performance testing device. The device comprises a sealing gas simulator, an isolation gas simulator, a testing fixture, and an analysis and testing unit. The seal to be tested is mounted in the testing fixture. Quick-release interfaces are provided on the exterior of the testing fixture, communicating with the sealing end of the seal to be tested, the isolation gas inlet, and the sealing gas outlet. The corresponding quick-release interfaces connect the sealing gas simulator, isolation gas simulator, and analysis and testing unit.

[0007] According to the sealing performance detection device of a dry gas seal described in the utility model, its further preferred technical solution is: the sealing gas simulation part is a quick-release interface that connects the sealing gas tank to the sealing end of the seal to be tested through a sealing gas pipeline, and a first flow meter, a first one-way valve, and a first pressure gauge are arranged in sequence in the sealing gas pipeline.

[0008] According to the sealing performance detection device of a dry gas seal of the present invention, a further preferred technical solution is that a first pressure reducing valve is provided between the first flow meter and the sealing gas tank.

[0009] According to the sealing performance detection device of a dry gas seal described in the utility model, its further preferred technical solution is: the isolation gas simulation part is a quick-release interface that connects the isolation gas tank to the inlet of the gas to be isolated through a sealing gas pipeline, and a second flow meter, a second one-way valve, and a second pressure gauge are arranged in the sealing gas pipeline in sequence.

[0010] According to the sealing performance detection device of the dry gas seal described in the utility model, a further preferred technical solution is: a second pressure reducing valve is provided between the second flow meter and the sealing gas tank.

[0011] According to the sealing performance detection device of a dry gas seal described in the present invention, a further preferred technical solution is: the analysis and detection part is connected to the air bag through an isolation gas outlet pipe, and a gas composition detection sensor is provided on the isolation gas outlet pipe.

[0012] According to the sealing performance detection device of a dry gas seal of the present invention, a further preferred technical solution is that a third flow meter is further provided on the isolation gas outlet pipe.

[0013] According to the sealing performance detection device of a dry gas seal described in the utility model, a further preferred technical solution is: a vacuum pump is also provided, and the vacuum pump is respectively connected to the pipelines of the sealing gas simulation part, the isolation gas simulation part, and the analysis and detection part.

[0014] According to the sealing performance detection device of a dry gas seal described in the utility model, a further preferred technical solution is that electromagnetic valves are provided on the pipelines connecting the vacuum pump and the sealing gas simulation part, the isolation gas simulation part, and the analysis and detection part.

[0015] Compared with the existing technology, the technical solution of the utility model has the following advantages / benefits:

[0016] 1. Use the air bag to collect the isolation gas after use, and simulate the emission environment of the isolation gas to be discharged as much as possible, so that there is basically no additional pressure outside. At the same time, the isolation gas after use can also be collected and tested, and the test results are accurate.

[0017] 2. Use the inspection tooling to install the dry gas seal to be inspected. Utilizing the quick-release interface, you only need to replace the corresponding tooling to achieve the sealing of each port of the dry gas seal before conducting the test. The cost of the test equipment is reduced, and only the corresponding tooling needs to be designed.

[0018] 3. Set up a gas tank to store sealing gas and isolation gas. For different sealing gas and isolation gas, you only need to replace the gas tank to simulate the use of gas, and adjust the pressure reducing valve and read the data of the pressure gauge to simulate the corresponding pressure.

[0019] 4. Set up vacuum equipment to discharge residual gas or air in the pipeline to eliminate interference and achieve a good simulation experimental environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 The utility model is a structural schematic diagram of a sealing performance detection device for a dry gas seal.

[0022] The marks in the figure are: 1. Sealing gas simulation part 101. Sealing gas tank 102. First pressure reducing valve 103. First flow meter 104. First one-way valve 105. First pressure gauge 2. Isolation gas simulation part 201. Isolation gas tank 202. Second pressure reducing valve 203. Second flow meter 204. Second one-way valve 205. Second pressure gauge 3. Detection tooling 301. Quick release interface 4. Analysis and detection part 401. Third flow meter 402. Detection sensor 403. Airbag 5. Vacuum pump 501. Solenoid valve. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0025] Example:

[0026] like Figure 1 As shown, a sealing performance detection device for dry gas seals. It includes a sealing gas simulation part 1, an isolation gas simulation part 2, a detection tool 3, and an analysis detection part 4. The seal to be detected is installed in the detection tool 3, and a quick-release interface 301 is provided on the outside of the detection tool 3 to be connected with the sealing end of the seal to be detected, the isolation gas inlet, and the sealing gas outlet respectively. The connection here means that the use environment of the seal to be detected is simulated by using the detection tool 3, and its air inlet is led out to the outer surface of the detection tool 3, and a quick-release interface 301 is provided on the outer surface to connect the corresponding sealing gas simulation part 1, the isolation gas simulation part 2, and the analysis detection part 4. The corresponding quick-release interfaces 301 are respectively connected to the sealing gas simulation part 1, the isolation gas simulation part 2, and the analysis detection part 4 to realize the entry or discharge of gas.

[0027] It should be noted that the detection tooling 3 mentioned in the present invention refers to a tooling for installing the dry gas seal to be tested, which is mainly used to isolate and seal the positions of each gas inlet and outlet so that the corresponding gas can be introduced. The corresponding remaining equipment can be set on the detection tooling 3 by yourself, such as the power source required for dry gas sealing, such as a motor, etc. The detection tooling 3 as a whole can be considered as an extended covering sealing device, and each inlet and outlet of the dry gas seal to be tested is separately isolated and extended to the surface of the detection tooling 3 to install the quick-release interface 301. This is not difficult to implement, and there are many ways of sealing and isolation, which will not be repeated here.

[0028] The sealing gas simulation part 1 is a quick-release interface 301 that connects the sealing gas tank 101 to the sealing end of the sealing component to be tested through a sealing gas pipeline. A first flowmeter 103, a first one-way valve 104, and a first pressure gauge 105 are sequentially arranged in the sealing gas pipeline. A first pressure reducing valve 102 is arranged between the first flowmeter 103 and the sealing gas tank 101. The isolation gas simulation part 2 is a quick-release interface 301 that connects the isolation gas tank 201 to the inlet of the gas to be isolated through a sealing gas pipeline. A second flowmeter 203, a second one-way valve 204, and a second pressure gauge 205 are sequentially arranged in the sealing gas pipeline. A second pressure reducing valve 202 is arranged between the second flowmeter 203 and the sealing gas tank 101. The above-mentioned first flow meter is used to count the flow (the outlet pipe is not drawn in the figure, and only some dry gas sealing valves require sealing gas to flow in and out). The first flow meter is only used when needed, and can also determine the leakage of sealing gas. The second flow meter and the third flow meter 401 are used for flow monitoring of isolation gas, which can assist in determining the inflow and outflow of isolation gas. The one-way valve is used to prevent backflow, and the pressure gauge is used to read the pressure in order to simulate the pressure requirements during use.

[0029] The analysis and detection part 4 is connected to the air bag 403 through the isolation gas outlet pipe. The air bag can collect the isolation gas in a sealed environment while ensuring that basically no additional pressure is brought, thereby simulating the use environment of the dry gas seal to be tested. A gas composition detection sensor 402 is set on the isolation gas outlet pipe. The gas composition detection sensor 402 is mainly used to detect whether there is sealing gas in the isolation gas and the content of the sealing gas, etc. Therefore, the gas composition detection sensor 402 is a general term, which can be a sensor specifically used to detect sealing gas, and can be set according to the type of sealing gas.

[0030] A third flow meter 401 is also provided on the isolation gas outlet pipe. The third flow meter 401 is mainly used for estimating the overall gas flow rate, which facilitates the estimation of leakage data detected.

[0031] A vacuum pump 5 is also provided, which is respectively connected to the pipelines of the sealing gas simulation part 1, the isolation gas simulation part 2, and the analysis and detection part 4. An electromagnetic valve 501 is provided on the pipelines connecting the vacuum pump 5 and the sealing gas simulation part 1, the isolation gas simulation part 2, and the analysis and detection part 4. The vacuum pump 5 is mainly used to extract the residual gas in the pipeline to ensure that there is no other gas in the pipeline. It is suitable for replacing different isolation gases or sealing gases, and is also suitable for restarting the entire equipment after maintenance.

[0032] Instructions for use: Install the dry gas seal to be tested into the corresponding test fixture, and install the test fixture in place. After closing all valves, install the corresponding gas isolation cylinder and sealing cylinder, turn on the vacuum pump and solenoid valve to exhaust the gas in the pipe, close the solenoid valve, open the pressure relief valve near the isolation cylinder and sealing cylinder, and adjust the air pressure to the corresponding value through the corresponding pressure gauge to maintain the normal operation of the dry gas seal to be tested, calculate the leakage rate by reading the value of the flow meter and the parameters of the gas composition detection sensor, and thus realize the sealing performance test of the dry gas seal.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the claims. Persons skilled in the art will appreciate that improvements and modifications may be made without departing from the spirit and scope of the present invention, and such improvements and modifications shall also be considered within the scope of protection of the present invention.

Claims

1. A sealing performance detection device for dry gas seals, characterized in that: It includes a sealing gas simulation part, an isolation gas simulation part, a detection tooling, and an analysis and detection part. The sealing part to be detected is installed in the detection tooling, and a quick-release interface is arranged on the outside of the detection tooling to be connected with the sealing end of the sealing part to be detected, the isolation gas inlet, and the sealing gas outlet respectively. The sealing gas simulation part, the isolation gas simulation part, and the analysis and detection part are respectively connected at the corresponding quick-release interfaces.

2. The sealing performance detection device of a dry gas seal according to claim 1, characterized in that: The sealing gas simulation part is a quick-release interface that connects the sealing gas tank to the sealing end of the sealing component to be tested through a sealing gas pipeline, and a first flow meter, a first one-way valve, and a first pressure gauge are sequentially arranged in the sealing gas pipeline.

3. The sealing performance detection device of a dry gas seal according to claim 2, characterized in that: A first pressure reducing valve is provided between the first flow meter and the sealing gas tank.

4. The sealing performance detection device of a dry gas seal according to claim 1, characterized in that: The isolation gas simulation part is a quick-release interface that connects the isolation gas tank to the inlet of the gas to be isolated through a sealing gas pipeline, and a second flow meter, a second one-way valve, and a second pressure gauge are sequentially arranged in the sealing gas pipeline.

5. The sealing performance detection device of a dry gas seal according to claim 4, characterized in that: A second pressure reducing valve is provided between the second flow meter and the sealing gas tank.

6. The sealing performance detection device of a dry gas seal according to claim 1, characterized in that: The analysis and detection part is connected to the air bag through an isolation gas outlet pipe, and a gas component detection sensor is arranged on the isolation gas outlet pipe.

7. The sealing performance detection device of a dry gas seal according to claim 6, characterized in that: A third flow meter is also provided on the isolation gas outlet pipe.

8. The sealing performance detection device of a dry gas seal according to claim 1, characterized in that: A vacuum pump is also provided, which is respectively connected to the pipelines of the sealing gas simulation part, the isolation gas simulation part and the analysis and detection part.

9. The sealing performance detection device of a dry gas seal according to claim 8, characterized in that: Solenoid valves are provided on the pipelines connecting the vacuum pump with the sealing gas simulation part, the isolation gas simulation part and the analysis and detection part.

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