Quick connector for online replacement of oil chromatography gas cylinder

Abstract

The invention provides an online oil chromatography gas cylinder replacement quick connector which comprises a threaded connector, a first end of the threaded connector can be opened and closed and can be closed under pushing of a gas cylinder connector, and the first end of the threaded connector is meshed with a tooth groove of the gas cylinder connector; the first end of the flexible connecting pipe is detachably connected with the second end of the threaded connector, and the second end of the flexible connecting pipe is provided with a connecting part. According to the invention, the first end of the threaded connector is opened and closed, so that plug-in connection with a gas cylinder joint is realized; connection is achieved through the flexible connecting pipe arranged at the second end of the threaded connector, the connecting angle is freely adjusted in multiple dimensions, the probability of occurrence of various secondary faults is reduced by evenly dispersing pipeline stress, and the connecting angle can be optimized and the operation radius can be shortened through the flexible connecting mode; and the tedious step of repeatedly adjusting the holding position of the wrench in the operation process is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of online oil chromatography, in particular to an online oil chromatography gas cylinder replacement quick connector. BACKGROUND

[0002] The online oil chromatography analysis device needs to frequently replace the gas cylinder during operation, and the currently widely used traditional threaded connection method has many technical defects. This connection method completely relies on manual use of a wrench for fastening, and in actual application, it has exposed a series of problems such as poor sealing performance, complex operation process, and harsh requirements for installation space, which not only significantly increases the safety hazard of gas leakage, but also seriously affects the work efficiency of gas cylinder replacement.

[0003] After in-depth analysis, the current technical solution mainly has the following multiple technical bottlenecks: 1. Low installation operation efficiency: due to the compact structure design of the chromatography equipment, the gas cylinder replacement operation space is extremely narrow, and the use of traditional wrench tools is extremely inconvenient, and a large amount of time and manpower is required for each replacement.

[0004] 2. Insufficient system adaptability: the gas cylinder and the chromatography device are connected by a rigid pipeline, which cannot be flexibly adjusted according to the actual situation on site. This structural characteristic easily leads to mechanical stress concentration at the interface part, and further causes secondary problems such as sealing surface damage.

[0005] 3. Due to the extremely narrow operation space, the range of motion of the operator's arm is greatly limited, making it difficult to use a wrench of conventional size. In this restricted environment, the fastening operation becomes extremely difficult, and the operator has to use an extremely laborious way: only half a turn of the wrench can be turned each time, and then the holding position needs to be adjusted, and this process needs to be repeated several times to complete a complete fastening action. This operation method is not only low in efficiency, but also a great test of the operator's physical strength and patience, and any carelessness may cause the fastening to be not in place or the tool to slip. SUMMARY

[0006] In view of this, the present application provides an online oil chromatography gas cylinder replacement quick connector, which aims to solve the problems of low efficiency and complicated operation of the existing online oil chromatography analysis device in frequent replacement of the gas cylinder.

[0007] The application provides an online oil chromatographic gas cylinder replacement quick connector, which comprises a threaded connector, a first end of the threaded connector being capable of being opened and closed, and being used for being closed under the pushing of a gas cylinder connector, the first end of the threaded connector being engaged with a socket of the gas cylinder connector to be clamped on a gas cylinder connector of an online oil chromatographic gas cylinder, so as to realize plug-in connection between the threaded connector and the gas cylinder connector; and a flexible connecting pipe, a first end of the flexible connecting pipe being detachably connected with a second end of the threaded connector, and a connecting portion being arranged at a second end of the flexible connecting pipe, and being used for connecting a pressure gauge of an online oil chromatographic analysis device, so as to realize connection between the online oil chromatographic gas cylinder and the online oil chromatographic analysis device.

[0008] Further, the online oil chromatographic gas cylinder replacement quick connector, a gas path connecting pipe is arranged on the threaded connector, the gas path connecting pipe is in communication with an internal gas path channel of the threaded connector, and the gas path connecting pipe is arranged at an angle with the threaded connector, as a second end of the threaded connector, and is connected with the first end of the flexible connecting pipe.

[0009] Further, the online oil chromatographic gas cylinder replacement quick connector, an external thread is arranged on an outer wall of a disconnection end of the gas path connecting pipe away from the threaded connector, an internal thread is arranged on an inner wall of the first end of the flexible connecting pipe, and is matched with the external thread of the disconnection end of the gas path connecting pipe; and an external thread is arranged on an outer wall of the connecting portion, and is matched with an internal thread of an inner wall of a connecting pipe of the pressure gauge.

[0010] Further, the online oil chromatographic gas cylinder replacement quick connector, the gas path connecting pipe is made of stainless steel; and / or, a connector main body of the threaded connector is made of stainless steel.

[0011] Further, the online oil chromatographic gas cylinder replacement quick connector, a torque monitoring mechanism is arranged on the threaded connector, and is used for monitoring a pressing torque between the piston column and the gas cylinder connector.

[0012] Further, the online oil chromatographic gas cylinder replacement quick connector, the torque monitoring mechanism is connected with a controller, the controller is used for comparing the pressing torque with a preset torque threshold value; and the controller is connected with an alarm, and when the pressing torque is less than the preset torque threshold value, the controller controls the alarm to send warning information.

[0013] Further, the online oil chromatographic gas cylinder replacement quick connector, the warning information sent by the alarm comprises at least one of the following: an audible and light warning, a vibration warning and an electronic signal sent to a remote monitoring center through a communication module.

[0014] Further, the online oil chromatogram gas cylinder replacement quick connector, the controller is further connected with a data storage module for recording historical resisting torque data and corresponding time; the controller is further used for judging performance attenuation trend of the threaded connector based on the historical resisting torque data, and generating replacement prompt information when reaching a warning condition.

[0015] Further, the online oil chromatogram gas cylinder replacement quick connector, the torque monitoring mechanism comprises a torque sensor arranged at the top pressing end of the piston column.

[0016] Further, the online oil chromatogram gas cylinder replacement quick connector, both ends of the flexible connecting pipe are provided with limiting portions for limiting end connecting positions of the flexible connecting pipe.

[0017] The online oil chromatography gas cylinder replacement quick connector provided by the application can be closed under the push of the gas cylinder connector through the opening and closing mode of the first end of the threaded connector, the first end of the threaded connector is engaged with the alveolus of the gas cylinder connector to be clamped on the gas cylinder connector of the online oil chromatography gas cylinder, so as to realize the plug-in connection between the threaded connector and the gas cylinder connector, ensure the stability of the connection, and realize the second-level quick docking in the actual operation process. In the actual operation process, the technician is completely free from the restriction of the traditional wrench and other auxiliary tools, and only needs to simply align, insert or pull out the quick connector at the gas cylinder end and the standardized interface designed in advance on the online oil chromatography analysis device, so that the whole gas cylinder replacement process can be easily completed. This connection mode not only greatly shortens the time required for equipment maintenance and significantly reduces the complexity of manual operation, but also effectively avoids the risk of equipment damage caused by improper tool operation, thereby improving the work efficiency, ensuring the safety and reliability of the operation process, and providing a powerful guarantee for the efficient operation of the laboratory. The flexible connecting pipe arranged at the second end of the threaded connector realizes the connection between the threaded connector and the online oil chromatography analysis device. The flexible connecting pipe can be freely adjusted in multiple dimensions according to the actual space layout and working condition requirements of the on-site installation environment, so as to completely solve the technical problem of uneven mechanical stress concentration distribution existing in the traditional rigid pipe connection mode. At the same time, the flexible connection mode uniformly disperses the stress on the pipe, effectively avoids the structural damage of the sealing surface caused by stress concentration, greatly reduces the risk of sealing failure caused by vibration and displacement, significantly improves the reliability and stability of the equipment operation, fundamentally reduces the probability of secondary failures, prolongs the maintenance period of the whole equipment system, and brings significant economic benefits and use value to the user. In addition, the flexible connection mode can optimize the connection angle and shorten the operation radius, so that the operator can smoothly and easily perform the connection operation even in an extremely narrow working space. Compared with the traditional connection mode, the new design completely avoids the tedious steps of repeatedly adjusting the wrench holding position during the operation process, greatly reduces the physical exertion of the operator, and significantly improves the overall work efficiency, ensuring the convenience of operation and fully considering the comfort experience of the user, truly realizing the "people-oriented" design concept, and solving the problems of low efficiency and complicated operation of the existing online oil chromatography analysis device in frequent gas cylinder replacement. BRIEF DESCRIPTION OF DRAWINGS

[0018] 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 accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the application. Moreover, the same reference numerals in the drawings indicate the same or similar elements. In the drawings: Figure 1A schematic diagram of the installation and use state of the online oil chromatography gas cylinder replacement quick connector provided in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the disassembly and assembly of the quick-connect fitting for replacing an online oil chromatography gas cylinder, as provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the quick-connect fitting for replacing an online oil chromatography gas cylinder provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a threaded connector provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the flexible connecting tube provided in an embodiment of the present invention; Explanation of reference numerals in the attached figures: 1-Threaded connector, 11-Claw, 12-Piston rod, 13-Gas connection pipe, 14-Connector body, 2-Flexible connection pipe, 21-Connecting part, 22-Limiting part, 3-Online oil chromatography gas cylinder, 31-Gas cylinder connector, 4-Pressure gauge. Detailed Implementation

[0019] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] See Figures 1 to 4 This is a preferred structure of the online oil chromatography gas cylinder replacement quick connector provided in this embodiment of the invention. As shown in the figure, the online oil chromatography gas cylinder replacement quick connector includes: a threaded connector 1 and a flexible connecting tube 2; wherein, The first end of threaded connector 1 (e.g.) Figure 2 The left end shown can open and close. When it is used to abut against the gas cylinder connector 31 of the online oil chromatography gas cylinder 3, it can close under the push of the gas cylinder connector 31. The first end of the threaded connector 1 engages with the tooth groove of the gas cylinder connector 31 to lock onto the gas cylinder connector 31 of the online oil chromatography gas cylinder 3, so as to realize the plug-in connection between the connector 1 and the gas cylinder connector 31.

[0021] Specifically, such as Figure 4 As shown, the threaded connector 1 can refer to an external threaded quick connector disclosed in Chinese Publication No. CN218348107U. The first end of the threaded connector 1 (as shown) Figure 4The left end (as shown) is provided with claws 11, which can open and close. Connection and fixation can be achieved using a snap-fit ​​method or a plug-in method. The end wall of the piston column 12 of the threaded connector 1 (such as...) Figure 4 A main O-ring can be provided on the left end wall shown. When the gas cylinder connector 31 is inserted between the claw teeth 11, the gas cylinder connector 31 will push the main O-ring together with the piston and the adjusting shim. When the upper end face of the adjusting shim exceeds the trigger point of the claw teeth 11, the small spring pushes the sleeve upward, thereby pushing the slope of the claw teeth 11 until the sleeve clamps the six claw teeth 11, so that the claw teeth 11 close inward and the claw teeth 11 are tightly engaged with the tooth groove of the gas cylinder connector 31, achieving the effect of quick connection. Simultaneously, the main O-ring design, when fluid flows within the connector body 14, generates an upward thrust on the piston rod 12 due to the area difference between the tail O-ring and the main O-ring. This ensures the main O-ring tightly adheres to the end face of the gas cylinder connector 31, achieving a seal. The greater the pressure, the stronger the seal, achieving both sealing and pressure resistance. In other words, it enables a perfect three-dimensional fit between the gas cylinder connector 31 and the threaded connector 1, forming a reliable airtight barrier not only under static conditions but also maintaining a stable seal even under system pressure fluctuations or temperature changes. Rigorous laboratory airtightness tests demonstrate that this sealing system can control the leakage rate to an extremely low level, completely preventing the occurrence of trace gas leaks. In addition, the main O-ring and the tail O-ring can be made of special materials that are corrosion-resistant and aging-resistant, ensuring performance stability during long-term use. This significantly improves the safety and reliability of the entire system, providing a solid guarantee for precision analytical experiments. It solves the problems of the lack of professional sealing elements at the connection interface between the gas cylinder and the chromatography device, the difficulty in ensuring reliable airtightness by relying solely on threaded mechanical fit, and the high likelihood of trace gas leakage during long-term use.

[0022] The first end of the flexible connecting tube 2 (e.g.) Figure 2 The lower left end shown) and the second end of threaded connector 1 (as shown) Figure 2 The upper right end shown is detachably connected to the second end of the flexible connecting tube 2 (as shown in the upper right end). Figure 2 The upper right end shown is provided with a connecting part 21, which is used to connect the pressure gauge 4 of the online oil chromatography analyzer to realize the connection between the online oil chromatography gas cylinder 3 and the online oil chromatography analyzer.

[0023] Specifically, the flexible connecting tube 2 can be a highly elastic flexible pipeline connection system, with both ends detachably connected to the second end of the threaded connector 1 and the pressure gauge 4, respectively, especially using threaded connections. In this embodiment, the flexible connecting tube 2 can not only adjust the connection angle, but also be screwed on for easy threaded connection fixation. Compared with traditional connection methods, the flexible connecting tube 2 avoids the tedious steps of repeatedly adjusting the wrench grip position during operation, significantly reducing the physical exertion of operators and significantly improving overall work efficiency. The flexible connecting tube 2 ensures both ease of operation and fully considers the user's comfort experience, truly realizing the "human-centered" design concept. In this embodiment, both ends of the flexible connecting tube 2 can be provided with limiting parts 22 to restrict the end connection position of the flexible connecting tube 2. In particular, the limiting part 22 at the first end of the flexible connecting tube 2 can press against the second end of the threaded connector 1, and the air passage connecting tube 13 at the second end of the threaded connector 1 can be provided with a limiting ring, etc., to achieve limiting fixation. The limiting part 22 at the first end of the flexible connecting tube 2 can press against the limiting ring of the pressure gauge 4 to achieve end limiting.

[0024] In this embodiment, the flexible connecting tube 2 may include an inner soft-sealing tube, a middle support tube, and an outer protective tube arranged sequentially from the inside out. Specifically, the inner soft-sealing tube is a polyvinyl chloride tube or an EPDM rubber tube; the middle support tube is a spring tube wound with stainless steel wire; and the outer protective tube can be a plastic tube or other structures. The outer wall of the outer protective tube may have textured surfaces to increase friction during twisting and handling.

[0025] In this embodiment, the threaded connector 1 is equipped with a torque monitoring mechanism for monitoring the pressure torque between the piston rod 12 and the gas cylinder connector 31. Specifically, this mechanism constitutes the basic system architecture for realizing the torque monitoring function. Preferably, the torque monitoring mechanism can be integrated inside or at the end of the piston rod 12, especially at the top pressure end of the piston rod 12 (e.g., the top pressure end). Figure 3 The core function of the piston rod 12 (shown on the left) is to monitor the pressure torque generated when it presses against the gas cylinder connector 31. This pressure torque directly reflects the compression state of the sealing surface. As a preferred and specific implementation of the torque monitoring mechanism, the torque monitoring mechanism may include a high-precision torque sensor. This torque sensor is directly installed at the pressure end of the piston rod 12. Because it is closest to the point of force application, it can most directly and accurately capture the interaction torque between the piston rod 12 and the gas cylinder connector 31, thereby obtaining a high-fidelity pressure torque signal.

[0026] In this embodiment, the torque monitoring mechanism is connected with a controller, which is used to compare the pressing torque with a preset torque threshold. Specifically, the signal output end of the torque monitoring mechanism (e.g. torque sensor) is electrically connected with a controller (e.g. MCU, PLC or dedicated processing circuit). The controller pre-stores a preset torque threshold, which represents the minimum torque value required to ensure sealing. The controller is configured to perform a comparison program: continuously or periodically read the pressing torque signal from the torque monitoring mechanism, and compare it with the internally stored preset torque threshold in real time to realize all subsequent warning and intelligent analysis functions.

[0027] The controller is connected with an alarm, which sends warning information when the pressing torque is less than the preset torque threshold. Specifically, the controller realizes a real-time fault alarm function. The controller is communicatively connected with an alarm. Here, "communicatively connected" includes but is not limited to wired connection (such as cable) or wireless connection (such as Bluetooth, ZigBee). When the controller determines that the real-time pressing torque is less than the preset torque threshold, the sealing performance is poor and there is a risk of leakage. The controller will immediately send a trigger instruction to the alarm to drive the alarm to send a real-time fault alarm. The purpose of this alarm is to remind the operator of the current operation failure, which needs to be stopped immediately and the equipment needs to be reinstalled or checked. Among them, the preset torque threshold is not a fixed value, but can be set and adjusted according to the actual situation to enhance the applicability of the application. Specifically: the preset torque threshold can be set based on the specifications of different types of gas cylinder connectors 31. For example, by inputting the type of the interface on site, the controller automatically calls the corresponding threshold value from the internal memory. The preset torque threshold can also be set according to the recommended tightening torque value provided by the manufacturer of the threaded connector 1, and can be multiplied by a safety factor (such as 0.8 to 0.9) on this basis. This way makes the application can be flexibly applied to a variety of scenarios, improving the versatility.

[0028] In order to adapt to different working environments (such as noisy substations, strong light outdoors or laboratories that need to be kept quiet), the application diversifies the form of the alarm. The warning information sent by the alarm can be at least one of the following forms: Acoustic-optic warning: for example, a buzzer emits an alarm sound, and an LED light flashes or lights up a specific color (such as red) for visual warning. This is the most direct and eye-catching way.

[0029] Vibration warning: for example, a vibration motor is integrated in the hand-held part or the shell of the quick connector. This way is particularly effective in noisy environments or when the operator cannot observe.

[0030] Electronic signal: The alarm information and related data (such as torque value, time, device ID) are packaged and sent to the remote monitoring center or the mobile terminal of the operation and maintenance personnel through the built-in communication module (such as 4G / 5G, LoRa, Wi-Fi module), realizing remote monitoring and information management.

[0031] In order to realize long-term monitoring of the state of the device, the controller can also be connected with a data storage module (such as EEPROM, Flash memory or SD card) for recording historical resistance torque data and corresponding time. The module is used to systematically record historical resistance torque data and corresponding operation time. After each successful installation operation, the controller stores the final stable torque value and the time stamp at that time as a data entry into the storage module. This provides valuable data basis for subsequent performance analysis.

[0032] In order to realize the advanced function of predictive maintenance, the controller is also used to judge the performance degradation trend of the threaded connector 1 based on the historical resistance torque data, and generate a replacement prompt information when the warning condition is reached. Specifically, the controller is configured to execute an advanced analysis program, which includes: trend analysis: the controller periodically calls the historical resistance torque data in the storage module, and analyzes the trend of torque value with time or number of uses through built-in algorithm (for example, linear regression, moving average method). A continuous and slow torque value decline trend usually means that the sealing ring inside the threaded connector 1 is wearing, the threaded pair is plastic deformed or other components are aging. Warning judgment: a performance degradation warning threshold (for example, the torque value is decreased by 15% compared with the initial value) is set in the system. When the trend analysis result shows that the performance degradation degree reaches or exceeds the warning threshold, the controller will generate a preventive maintenance or replacement prompt. The prompt can be issued in a gentle way (such as yellow indicator light slow flashing) that is different from the real-time fault alarm through the alarm, or only a maintenance suggestion information is sent to the monitoring center through the communication module. This enables the device administrator to calmly arrange to replace the threaded connector 1 during the planned downtime before the failure occurs, thereby realizing the upgrade of the operation and maintenance mode from "passive repair" to "active prevention", greatly improving the system reliability and safety.

[0033] Continuing to refer to Figure 4For the convenience of installation and replacement in narrow areas, the threaded connector 1 is provided with an air path connecting pipe 13, which is connected with the air path channel in the threaded connector 1, and the air path connecting pipe 13 is arranged at an angle with the threaded connector 1, as the second end of the threaded connector 1, and is connected with the first end of the flexible connecting pipe 2. Specifically, the air path connecting pipe 13 is a tubular structure, which is inserted and fixed on the threaded connector 1 and is arranged vertically with the threaded connector 1, so as to lead the second end of the threaded connector 1, i.e. the connecting end with the flexible connecting pipe 2, to other positions, i.e. to one side (such as the upper side shown in Figure 3 The threaded connector 1 is made of stainless steel material.

[0034] In the embodiment, the air path connecting pipe 13, the first end of the flexible connecting pipe 2, and the connecting part 21 of the second end of the flexible connecting pipe 2 and the pressure gauge 4 can be connected by threads. Specifically, the outer wall of the disconnection end (such as the top end shown in Figure 4 The inner wall of the first end of the flexible connecting pipe 2 is provided with an internal thread, which is matched with the external thread of the disconnection end of the air path connecting pipe 13; the outer wall of the connecting part 21 is provided with an external thread, which is matched with the internal thread of the connecting pipe inner wall of the pressure gauge 4 of the online oil chromatographic analysis device.

[0035] In the embodiment, the quick connector can have good universality and interchangeability. The standardized interface design enables different brands and models of online oil chromatographic gas cylinders 3 and online oil chromatographic analysis devices to be seamlessly connected, greatly improving the compatibility and flexibility of the equipment. This universal design not only facilitates users to select and configure equipment according to actual needs, but also reduces additional costs and time waste caused by equipment mismatch, further improving the work efficiency and economic benefits of the entire laboratory In summary, the online oil chromatographic gas cylinder replacement quick connector provided by the embodiment can be closed under the pushing of the gas cylinder connector 31 through the opening and closing of the first end of the threaded connector 1, the first end of the threaded connector 1 is engaged with the tooth groove of the gas cylinder connector 31 to be clamped on the gas cylinder connector 31 of the online oil chromatographic gas cylinder 3, so as to realize the plug-in connection between the threaded connector 1 and the gas cylinder connector 31, ensure the stability of the connection, and realize the second-level quick docking in the actual operation process. In the actual operation process, the technician is completely free from the restriction of the traditional wrench and other auxiliary tools, and only needs to simply align, insert or pull out the quick connector at the gas cylinder end and the standardized interface designed in advance on the online oil chromatographic analysis device, so as to easily complete the entire gas cylinder replacement process. This connection mode not only greatly shortens the time required for equipment maintenance and significantly reduces the complexity of manual operation, but also effectively avoids the risk of equipment damage caused by improper tool operation, thereby improving the work efficiency and ensuring the safety and reliability of the operation process, providing a powerful guarantee for the efficient operation of the laboratory. The flexible connecting pipe 2 provided at the second end of the threaded connector 1 realizes the connection between the threaded connector 1 and the online oil chromatographic analysis device. The flexible connecting pipe 2 can be freely adjusted in multiple dimensions according to the actual space layout and working condition requirements of the on-site installation environment, thereby completely solving the technical problem of uneven mechanical stress concentration distribution existing in the traditional rigid pipe connection mode. At the same time, the flexible connection mode uniformly disperses the stress on the pipe, effectively avoids the structural damage of the sealing surface caused by stress concentration, greatly reduces the risk of sealing failure caused by vibration and displacement, significantly improves the reliability and stability of the equipment operation, and fundamentally reduces the probability of secondary failures, thereby prolonging the maintenance period of the entire equipment system and bringing significant economic benefits and use value to the user. In addition, the flexible connection mode can optimize the connection angle and shorten the operation radius, so that the operator can smoothly and easily perform the connection operation even in an extremely narrow working space. Compared with the traditional connection mode, the new design completely avoids the tedious steps of repeatedly adjusting the wrench holding position during the operation process, greatly reduces the physical exertion of the operator, and significantly improves the overall work efficiency, ensuring the convenience of operation and fully considering the comfort experience of the user, truly realizing the "people-oriented" design concept, and solving the problems of low efficiency and complicated operation of frequent replacement of the gas cylinder of the existing online oil chromatographic analysis device.

[0036] It should be noted that in the description of the present application, the terms "up", "down", "left", "right", "in", "out" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application.

[0037] Furthermore, it needs to be explained that in the description of the present application, unless explicitly defined and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. An online oil chromatography cylinder change quick connector, characterized by, The threaded connector is provided with a first end capable of being opened and closed, which is used to be closed under the pushing of the cylinder connector, and the first end of the threaded connector is engaged with the cylinder connector to be clamped on the cylinder connector of the online oil chromatography cylinder to achieve the plug-in connection between the threaded connector and the cylinder connector. The flexible connecting pipe is detachably connected with the second end of the threaded connector, and the second end of the flexible connecting pipe is provided with a connecting part for connecting a pressure gauge of an online oil chromatography analysis device to achieve the connection between the online oil chromatography cylinder and the online oil chromatography analysis device.

2. The online oil chromatography cylinder quick connector according to claim 1, wherein a gas path connecting pipe is arranged on the threaded connector, the gas path connecting pipe is in communication with the gas path channel in the threaded connector, and the gas path connecting pipe is arranged at an angle with the threaded connector as the second end of the threaded connector and is connected with the first end of the flexible connecting pipe.

3. The online oil chromatography cylinder quick connector according to claim 2, wherein an external thread is arranged on the outer wall of the disconnection end of the gas path connecting pipe away from the threaded connector, and an internal thread is arranged on the inner wall of the first end of the flexible connecting pipe, which is matched with the external thread of the disconnection end of the gas path connecting pipe; and an external thread is arranged on the outer wall of the connecting part, which is matched with the internal thread of the connecting pipe of the pressure gauge.

4. The online oil chromatography cylinder quick connector according to claim 2, wherein the gas path connecting pipe is made of stainless steel; and / or the connector body of the threaded connector is made of stainless steel.

5. The online oil chromatography cylinder quick connector according to any one of claims 1 to 4, wherein a torque monitoring mechanism is arranged on the threaded connector, which is used to monitor the pressing torque between the piston column and the cylinder connector.

6. The online oil chromatography cylinder quick connector according to claim 5, wherein the torque monitoring mechanism is connected with a controller, which is used to compare the pressing torque with a preset torque threshold; and the controller is connected with an alarm, which is controlled by the controller to send warning information when the pressing torque is less than the preset torque threshold.

7. The online oil chromatography cylinder quick connector according to claim 6, wherein the warning information sent by the alarm includes at least one of the following: audible and visual warning, vibration warning, and electronic signal sent to a remote monitoring center through a communication module.

8. The online oil chromatography cylinder quick connector according to claim 6, wherein the controller is further connected with a data storage module, which is used to record historical pressing torque data and corresponding time; and the controller is further used to judge the performance attenuation trend of the threaded connector based on the historical pressing torque data, and generate a replacement prompt information when a warning condition is reached.

9. The online oil chromatography cylinder quick connector according to claim 5, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The torque monitoring mechanism comprises a torque sensor arranged at the top pressing end of the piston column.

10. An online oil chromatography cylinder change quick coupling according to any one of claims 1 to 4, characterized in that, The flexible connecting pipe is provided with a limiting part at both ends, which is used for limiting the end connecting position of the flexible connecting pipe.

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