An apparatus and system for obtaining standard gas.

Abstract

This invention discloses an apparatus and system for obtaining standard gas, relating to the field of material separation technology. The apparatus includes a frame, a controller, a first power-driven telescopic rod, a second power-driven telescopic rod, a syringe body, a needle, a first power-driven valve, a second power-driven valve, a first pipeline, and a second pipeline. The fixed parts of the first and second power-driven telescopic rods and the container are fixedly connected to the frame. The movable part of the first power-driven telescopic rod is fixedly connected to the push rod of the syringe body. The movable part of the second power-driven telescopic rod is fixedly connected to the needle. The first pipeline connects the container to the standard gas tank. The first power-driven valve is on the first pipeline. The second pipeline connects the needle to the container. The second power-driven valve is on the second pipeline. The system includes an initialization module, a pretreatment module, a first extension module, and a first contraction module. The telescopic rods and valves can vent air from the pipelines and needle, thereby ensuring high accuracy of the standard gas.

Description

Technical Field

[0001] This invention relates to the field of material separation technology, and in particular to an apparatus and system for obtaining standard gas. Background Technology

[0002] The application, published under CN115201390A, is entitled "An Automatic Sample Injection Device and Method for Chromatographic Analysis of Insulating Oil." It includes a six-way valve, a quantitative tube, a valve island, several sample injectors, a carrier gas line, and a standard gas line. A mass flow controller is installed on the carrier gas line, which is connected via a three-way connector to branch lines equipped with a first and second solenoid valve. An inlet connected to the standard gas line is located near the left side of the valve island, and a third solenoid valve is installed on the standard gas line. Multiple sample lines, each connected to a sample injector, are evenly distributed on the valve island. One end of the quantitative tube is connected to a six-way valve interface, and the other end is connected to a six-way valve interface. The six-way valve interface is connected to the valve island's outlet, a vent line equipped with a fourth solenoid valve, and the sample injection line. This device enables automatic injection of multiple samples, reducing labor intensity and solving the problem of poor repeatability in manual injection.

[0003] The authorization announcement number is CN105241987B, and the name is "Fully Automatic Dissolved Gas Analyzer in Insulating Oil". This gas analyzer includes a degassing mechanism, an automatic sample injection mechanism, a chromatography mechanism, and a circuit control section. The degassing mechanism includes a degassing disc, a degassing motor, a background light source, and a camera. The degassing motor drives the degassing disc to rotate. N vertical syringe mounting holes are evenly arranged around the upper surface of the degassing disc. The background light source and camera are used to detect the amount of insulating oil in the syringes. The automatic sample injection mechanism includes a gas injection motor, a belt, a gas injection head bracket, a gas injection head, and a push rod motor. The gas injection motor drives the gas injection head bracket to move up and down via the belt. The gas injection head is mounted on the gas injection head bracket. When the degassing disc rotates to the set position, the upper end of the syringe being tested on the degassing disc corresponds exactly to the gas injection head, and the lower end corresponds exactly to the upper end of the push rod of the push rod motor. The hollow needle in the gas injection head is connected to the chromatography mechanism. It has a high degree of automation and small error.

[0004] The authorization announcement number is CN214585159U, and the name is "A Gas Sampling Device for a Chromatograph". Its structure includes a transparent syringe quantitative clamp, which comprises a clamp body with a fixing hole for inserting a syringe. One side of the clamp body with the fixing hole is divided into two separate parts, which are connected and locked together by a locking mechanism. The other side of the clamp body with the fixing hole has a through hole for inserting and fixing an adjusting rod. It features high measurement accuracy and good sealing performance.

[0005] Based on the above three patent documents and existing technical solutions, the inventors analyze the existing technical solutions as follows.

[0006] Transformers are among the most important pieces of equipment in a power system, and their safe and stable operation plays a crucial role in the stability of the power grid. The dissolved gas test in transformer oil can effectively reflect whether there is internal discharge in the transformer. It is one of the most accurate and intuitive tests for reflecting the equipment's condition and is widely used both domestically and internationally.

[0007] Currently, mainstream dissolved gas testing in oils requires manual extraction of standard gas from a standard gas tank and injection into the chromatograph. Because the accuracy requirements for dissolved gas testing in oils are extremely high, different methods of extracting the standard gas can significantly impact the test results, leading to misjudgments of equipment status by professional testing personnel. There is an urgent need for a device and system to improve the accuracy of standard gas extraction, enabling automated standard gas extraction and avoiding errors caused by manual standardization.

[0008] Existing technical issues and considerations:

[0009] How to solve the technical problem of large errors in standard gas. Summary of the Invention

[0010] This invention provides an apparatus and system for obtaining standard gas, solving the technical problem of large errors in standard gas.

[0011] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0012] An apparatus for obtaining a standard gas includes a frame, a controller, a first power-driven telescopic rod, a second power-driven telescopic rod, a syringe body, a needle, a first power-driven valve, a second power-driven valve, a first tubing, and a second tubing. The fixed portions of the first and second power-driven telescopic rods, as well as the container of the syringe body, are fixedly connected to the frame. The movable portion of the first power-driven telescopic rod is fixedly connected to the push rod of the syringe body. The movable portion of the second power-driven telescopic rod is fixedly connected to the needle. One end of the first tubing is connected to the container, and the other end is connected to a standard gas cylinder. The first power-driven valve is on the first tubing. One end of the second tubing is connected to the container, and the other end is connected to the needle. The second power-driven valve is on the second tubing. The control terminal of the controller is electrically connected to the control terminals of the first power-driven telescopic rod, the second power-driven telescopic rod, the first power-driven valve, and the second power-driven valve.

[0013] A further technical solution includes a standard gas cylinder, with the first pipeline connected to the standard gas cylinder.

[0014] A further technical solution involves connecting the standard gas tank to the frame.

[0015] A further technical solution is that the syringe body includes a container and a plunger, the plunger being movably connected to the container and used for sampling or dispensing.

[0016] A further technical solution is that the controller is a microcontroller or an industrial computer.

[0017] A further technical solution is that the power-driven telescopic rod is an electric push rod.

[0018] A further technical solution is that the power-driven valve is a solenoid valve.

[0019] A further technical solution involves using a flexible hose as the pipeline.

[0020] A system for obtaining standard gas includes the aforementioned apparatus, and further includes an initialization module, a preprocessing module, a first extension module, and a first contraction module. The initialization module is used for the controller to obtain a sampling scale and a number of cycles. The controller sends the sampling scale to a first power-driven telescopic rod, which obtains the sampling scale and uses it as a contraction stroke parameter. The preprocessing module is used for the controller to execute the first extension module, and to cyclically execute the first contraction module and the first extension module sequentially according to the number of cycles. The first extension module is used for the controller to send a closing command to a first power-driven valve and an opening command to a second power-driven valve. The first power-driven valve receives the closing command and closes, and the second power-driven valve receives the opening command and opens. The controller sends an extension command to the first power-driven telescopic rod, which receives the extension command and, according to a preset first extension... The stroke parameters control the extension of its movable part. The extended movable part of the first power-driven telescopic rod drives the plunger of the syringe body to move. The moving plunger approaches the container until it presses against the container. The first power-driven telescopic rod is aware that the extension is complete and informs the controller. The first contraction module is used by the controller to send an open command to the first power-driven valve and a close command to the second power-driven valve. The first power-driven valve receives the open command and opens, and the second power-driven valve receives the close command and closes. The controller sends a contraction command to the first power-driven telescopic rod. The first power-driven telescopic rod receives the contraction command and controls its movable part to contract according to the contraction stroke parameters. The contracted movable part of the first power-driven telescopic rod drives the plunger of the syringe body to move. The moving plunger moves away from the container until it reaches the position corresponding to the contraction stroke parameters. The first power-driven telescopic rod is aware that the contraction is complete and informs the controller.

[0021] A further technical solution includes a sampling module, which is used to execute the first shrinkage module and complete sampling after the preprocessing module has been executed.

[0022] A further technical solution includes a second extension module and an injection module. The second extension module is used by the controller to send an extension command to the second power-driven telescopic rod. The second power-driven telescopic rod receives the extension command and controls its movable part to extend according to the preset second extension stroke parameters. The extended movable part of the second power-driven telescopic rod drives the needle to move. The moving needle approaches and pierces the air-sealing membrane. The second power-driven telescopic rod knows that the extension is complete and informs the controller. The injection module is used by the controller to execute the first extension module and complete the sample sorting after the sampling module and the second extension module have been executed.

[0023] A further technical solution includes a second contraction module, which is used to send a contraction command to the second power-driven telescopic rod after the injection module has executed the command. The second power-driven telescopic rod receives the contraction command and contracts its movable part. The second power-driven telescopic rod then knows that the contraction is complete and informs the controller.

[0024] A further technical solution includes an input device, a controller connected to and communicating with the input device, and an initialization module used to input the sampling scale and the number of cycles into the input device. The input device obtains the sampling scale and the number of cycles and sends them to the controller.

[0025] A further technical solution includes a chromatograph, with a frame mounted on the chromatograph, a needle inserted into or withdrawn from the chromatograph's gas-isolating membrane, and a controller connected to and communicating with the chromatograph.

[0026] The beneficial effects of adopting the above technical solution are as follows:

[0027] First, an apparatus for obtaining standard gas includes a frame, a controller, a first power-driven telescopic rod, a second power-driven telescopic rod, a syringe body, a needle, a first power-driven valve, a second power-driven valve, a first tubing, and a second tubing. The fixed portions of the first and second power-driven telescopic rods, as well as the container of the syringe body, are fixedly connected to the frame. The movable portion of the first power-driven telescopic rod is fixedly connected to the push rod of the syringe body, and the movable portion of the second power-driven telescopic rod is fixedly connected to the needle. One end of the first tubing is connected to the container, and the other end is connected to a standard gas container. The first power-driven valve is on the first tubing. One end of the second tubing is connected to the container, and the other end is connected to the needle. The second power-driven valve is on the second tubing. The control terminal of the controller is electrically connected to the control terminals of the first power-driven telescopic rod, the second power-driven telescopic rod, the first power-driven valve, and the second power-driven valve. This technical solution allows air to be vented from the tubing and needle through the telescopic rods and valves, thus ensuring high accuracy of the standard gas.

[0028] Second, a system for obtaining standard gas includes the aforementioned apparatus, further comprising an initialization module, a preprocessing module, a first extension module, and a first contraction module. The initialization module is used for the controller to obtain a sampling scale and a number of cycles. The controller sends the sampling scale to a first power-driven telescopic rod, which obtains the sampling scale and uses it as a contraction stroke parameter. The preprocessing module is used for the controller to execute the first extension module, cyclically executing the first contraction module and the first extension module sequentially according to the number of cycles. The first extension module is used for the controller to send a closing command to a first power-driven valve and an opening command to a second power-driven valve. The first power-driven valve receives the closing command and closes, the second power-driven valve receives the opening command and opens, and the controller sends an extension command to the first power-driven telescopic rod. The first power-driven telescopic rod receives the extension command and, according to a preset first... The extension stroke parameters control the extension of its movable part. The extension of the first power-driven telescopic rod drives the plunger of the syringe body to move. The moving plunger approaches the container until it presses against the container. The first power-driven telescopic rod detects that the extension is complete and notifies the controller. The first contraction module is used by the controller to send an open command to the first power-driven valve and a close command to the second power-driven valve. The first power-driven valve opens upon receiving the open command, and the second power-driven valve closes upon receiving the close command. The controller then sends a contraction command to the first power-driven telescopic rod. The first power-driven telescopic rod receives the contraction command and controls its movable part to contract according to the contraction stroke parameters. The contraction of the first power-driven telescopic rod drives the plunger of the syringe body to move away from the container until it reaches the position corresponding to the contraction stroke parameters. The first power-driven telescopic rod detects that the contraction is complete and notifies the controller. This technical solution, through the telescopic rod and valves, can vent air from the tubing and needle, thus ensuring high accuracy of the calibration gas.

[0029] See the detailed implementation section for further description. Attached Figure Description

[0030] Figure 1 This is a structural diagram of Embodiment 1 of the present invention;

[0031] Figure 2 This is a principle block diagram of Embodiment 1 of the present invention;

[0032] Figure 3 This is a principle block diagram of Embodiment 2 of the present invention;

[0033] Figure 4 This is a principle block diagram of Embodiment 3 of the present invention.

[0034] The components include: 1. base, 2. bracket, 3. first electric push rod, 4. second electric push rod, 5. push rod of syringe body, 6. needle, 7. first solenoid valve, 8. second solenoid valve, 9. first ventilation hose, 10. second ventilation hose, 11. limit pin, 12. standard gas tank, and 13. air barrier membrane. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] Example 1:

[0038] like Figure 1 and Figure 2 As shown, this invention discloses a device for obtaining standard gas, comprising a frame, a controller, a first power-driven telescopic rod, a second power-driven telescopic rod, a syringe body, a needle, a first power-driven valve, a second power-driven valve, a first pipeline, and a second pipeline. The syringe body includes a container and a push rod, the push rod being movably connected to the container and used for sampling or discharging. The controller is a microcontroller, the power-driven telescopic rod is an electric push rod, the power-driven valve is a solenoid valve, and the pipeline is a flexible tube. The fixing parts of the first and second power-driven telescopic rods, as well as the container of the syringe body, are all fixedly connected to the frame. The movable part of the force-driven telescopic rod is fixedly connected to the plunger of the syringe body, and the movable part of the second power-driven telescopic rod is fixedly connected to the needle. One end of the first tubing is connected to the container, and the other end of the first tubing is used to connect to the standard gas cylinder. The first power-driven valve is fixedly connected to the first tubing. One end of the second tubing is connected to the container, and the other end of the second tubing is connected to the needle. The second power-driven valve is fixedly connected to the second tubing. The control terminal of the controller is electrically connected to the control terminals of the first power-driven telescopic rod, the second power-driven telescopic rod, the first power-driven valve, and the second power-driven valve, respectively.

[0039] like Figure 1As shown, the frame includes a base 1 and a bracket 2 that are fixedly connected to each other. The first power-driven telescopic rod is a first electric push rod 3, the second power-driven telescopic rod is a second electric push rod 4, the syringe body has a push rod 5, a needle 6, a first power-driven valve is a first solenoid valve 7, a second power-driven valve is a second solenoid valve 8, a first pipeline is a first ventilation hose 9, a second pipeline is a second ventilation hose 10, and a limiting pin 11. The container of the syringe body is fixedly connected to the bracket 2 through the limiting pin 11.

[0040] like Figure 2 As shown, the control terminal of the microcontroller is electrically connected to the control terminals of the first power-driven telescopic rod, the second power-driven telescopic rod, the first power-driven valve, and the second power-driven valve, respectively. That is, the control terminal of the controller is electrically connected to the control terminal of the first electric push rod, the control terminal of the controller is electrically connected to the control terminal of the second electric push rod, the control terminal of the controller is electrically connected to the control terminal of the first solenoid valve, and the control terminal of the controller is electrically connected to the control terminal of the second solenoid valve.

[0041] The microcontroller, electric actuator, and solenoid valve themselves, as well as the corresponding communication connection technology, are existing technologies and will not be elaborated here.

[0042] Example 1 Instructions for use:

[0043] like Figure 1 As shown, before use, fix the standard gas cylinder 12 to the bracket 2, and connect the first ventilation hose 9 to the standard gas cylinder 12. Fix the base 1 on the chromatograph, adjust its position so that the needle 6 can penetrate the gas septum 13 of the chromatograph or be pulled out.

[0044] Example 2:

[0045] Example 2 differs from Example 1 in that it also includes a standard gas tank and the controller is an industrial computer.

[0046] like Figure 1 and Figure 3As shown, this invention discloses a device for obtaining standard gas, comprising a frame, a controller, a first power-driven telescopic rod, a second power-driven telescopic rod, a syringe body, a needle, a first power-driven valve, a second power-driven valve, a first pipeline, a second pipeline, and a standard gas container. The syringe body includes a container and a push rod, the push rod being movably connected to the container and used for sampling or discharging. The controller is an industrial computer, the power-driven telescopic rod is an electric push rod, the power-driven valve is a solenoid valve, and the pipeline is a flexible hose. The fixing parts of the first and second power-driven telescopic rods, as well as the container of the syringe body, are all fixedly connected to the frame. The movable part of a power-driven telescopic rod is fixedly connected to the plunger of the syringe body; the movable part of a second power-driven telescopic rod is fixedly connected to the needle; one end of a first tubing is connected to a container; the other end of the first tubing is connected to a standard gas cylinder; a first power-driven valve is fixedly connected to the first tubing; one end of a second tubing is connected to a container; the other end of the second tubing is connected to the needle; a second power-driven valve is fixedly connected to the second tubing; and the control terminal of the controller is electrically connected to the control terminals of the first power-driven telescopic rod, the second power-driven telescopic rod, the first power-driven valve, and the second power-driven valve, respectively.

[0047] like Figure 1 As shown, the frame includes a base 1 and a bracket 2 fixedly connected to each other. The first power-driven telescopic rod is a first electric push rod 3, the second power-driven telescopic rod is a second electric push rod 4, the syringe body has a push rod 5, a needle 6, a first power-driven valve is a first solenoid valve 7, a second power-driven valve is a second solenoid valve 8, a first pipeline is a first ventilation hose 9, a second pipeline is a second ventilation hose 10, and a limiting pin 11. The syringe body's container is fixedly connected to the bracket 2 via the limiting pin 11. A standard gas canister 12 is fixedly connected to the bracket 2, and the first ventilation hose 9 is connected to the standard gas canister 12 for conduction.

[0048] like Figure 3 As shown, the control terminal of the industrial control computer is electrically connected to the control terminals of the first power-driven telescopic rod, the second power-driven telescopic rod, the first power-driven valve, and the second power-driven valve, respectively. That is, the control terminal of the controller is electrically connected to the control terminal of the first electric push rod, the control terminal of the controller is electrically connected to the control terminal of the second electric push rod, the control terminal of the controller is electrically connected to the control terminal of the first solenoid valve, and the control terminal of the controller is electrically connected to the control terminal of the second solenoid valve.

[0049] The industrial control computer, electric actuator, and solenoid valve themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0050] Instructions for use of Example 2:

[0051] like Figure 1As shown, before use, fix the base 1 on the chromatograph, adjust its position so that the needle 6 can pierce the gas-isolating membrane 13 of the chromatograph or be pulled out. Connect the industrial control computer to the chromatograph and establish communication.

[0052] Example 3:

[0053] Example 3 differs from Example 1 in that it further includes an initialization module, a preprocessing module, a first stretching module, a first contraction module, a sampling module, a second stretching module, a second contraction module, and an injection module.

[0054] like Figure 1 and Figure 4 As shown, the present invention discloses a system for obtaining standard gas, including the apparatus of Embodiment 1, and further including an initialization module, a preprocessing module, a first stretching module, a first contraction module, a sampling module, a second stretching module, a second contraction module, and an injection module running on a controller.

[0055] The initialization module is used by the controller to obtain the sampling scale and the number of cycles. The controller sends the sampling scale to the first power-driven telescopic rod, which obtains the sampling scale and uses it as the retraction stroke parameter.

[0056] The preprocessing module is used by the controller to execute the first stretching module, and to execute the first contraction module and the first stretching module sequentially according to the number of cycles.

[0057] The first extension module is used by the controller to send a closing command to the first power-driven valve and an opening command to the second power-driven valve. The first power-driven valve receives the closing command and closes, and the second power-driven valve receives the opening command and opens. The controller sends an extension command to the first power-driven telescopic rod. The first power-driven telescopic rod receives the extension command and controls its movable part to extend according to the preset first extension stroke parameters. The extended movable part of the first power-driven telescopic rod drives the push rod of the syringe body to move. The moving push rod approaches the container until it presses the container. The first power-driven telescopic rod knows that the extension is complete and informs the controller.

[0058] The first contraction module is used by the controller to send an open command to the first power-driven valve and a close command to the second power-driven valve. The first power-driven valve receives the open command and opens, and the second power-driven valve receives the close command and closes. The controller sends a contraction command to the first power-driven telescopic rod. The first power-driven telescopic rod receives the contraction command and controls its movable part to contract according to the contraction stroke parameters. The contracted movable part of the first power-driven telescopic rod drives the push rod of the syringe body to move. The moving push rod moves away from the container until it reaches the position corresponding to the contraction stroke parameters. The first power-driven telescopic rod knows that the contraction is complete and informs the controller.

[0059] The sampling module is used to execute the first shrinkage module and complete the sampling after the preprocessing module has been executed.

[0060] The second extension module is used by the controller to send an extension command to the second power-driven telescopic rod. The second power-driven telescopic rod receives the extension command and controls its movable part to extend according to the preset second extension stroke parameters. The extended movable part of the second power-driven telescopic rod drives the needle to move. The moving needle approaches and pierces the air barrier membrane. The second power-driven telescopic rod knows that the extension is complete and informs the controller.

[0061] The injection module is used by the controller to execute the first extension module and complete the sorting after the sampling module and the second extension module have been executed.

[0062] The second contraction module is used to send a contraction command to the second power-driven telescopic rod after the injection module is executed. The second power-driven telescopic rod receives the contraction command and contracts its movable part. The second power-driven telescopic rod knows that the contraction is complete and informs the controller.

[0063] In this embodiment, the sampling scale and the number of cycles are downloaded to the controller in advance as needed.

[0064] The sampling scale can be freely set according to the required sampling amount, and the number of cycles is at least once.

[0065] For example, the loop count is three times.

[0066] Example 4:

[0067] The difference between Example 4 and Example 3 is that the controller is an industrial computer and also includes an input device. The controller is connected to and communicates with the input device. The initialization module is also used to input the sampling scale and the number of cycles into the input device. The input device obtains the sampling scale and the number of cycles and sends them to the controller.

[0068] The present invention discloses a system for obtaining standard gas, including the system of embodiment 3, and further includes an input device, a controller connected to and communicating with the input device, an initialization module, and is also used to input the sampling scale and the number of cycles into the input device, the input device obtaining the sampling scale and the number of cycles and sending them to the controller.

[0069] The input device includes a monitor, keyboard, and mouse. The industrial computer is connected to and communicates with the monitor, the keyboard, and the mouse. The hardware itself is existing technology and will not be described in detail.

[0070] Example 5:

[0071] Example 5 differs from Example 4 in that it also includes a chromatograph, with the frame fixed on the chromatograph, the needle inserted into or pulled out of the chromatograph's gas-isolating membrane, and the industrial control computer connected to and communicating with the chromatograph.

[0072] Compared to the above embodiments, the program module can also be a hardware module made using existing logic operation technology to implement the corresponding logic operation steps, communication steps and control steps, thereby realizing the above-mentioned corresponding steps. The logic operation unit is existing technology and will not be described in detail here.

[0073] Research and development process:

[0074] 1. Technical problems to be solved

[0075] Currently, mainstream dissolved gas testing in oils requires manual extraction of standard gas from a standard gas tank and injection into the chromatograph. Because the accuracy requirements for dissolved gas testing in oils are extremely high, different methods of extracting the standard gas can significantly impact the test results, leading to misjudgments of equipment status by professional testing personnel. There is an urgent need for a device and system to improve the accuracy of standard gas extraction, enabling automated standard gas extraction and avoiding errors caused by manual standardization.

[0076] 2 Technical Solution

[0077] The invention relates to a device and system for improving the accuracy of calibration gas, which simulates the manual calibration process, automates the calibration work, and ensures that the machine's operation is standardized, uniform, and reliable, thus avoiding calibration errors caused by factors in the manual calibration process.

[0078] ① Structure

[0079] The standard gas cylinder is connected to the syringe via a hose and a first valve.

[0080] The needle is connected to the syringe via a tubing and a second valve.

[0081] The plunger of the first electric actuator is connected to the syringe core.

[0082] The insertion of the syringe is achieved by controlling the extension and retraction of the first electric plunger.

[0083] The second electric actuator is connected to the needle via its push rod.

[0084] The insertion and withdrawal of the needle into and out of the gas barrier membrane and the gas path of the chromatograph are achieved by controlling the extension and retraction of the second electric actuator.

[0085] The gas-barrier membrane is an original structure of the chromatograph.

[0086] The syringe, first electric plunger, second electric plunger, first valve, second valve, and standard gas canister are fixed on the bracket.

[0087] The bracket is fixed to the base.

[0088] The base is placed on top of the chromatograph, and the needle is aligned with the gas-isolating membrane.

[0089] ② Process

[0090] Manual process:

[0091] S11 Insert the syringe needle into the standard gas canister and draw standard gas.

[0092] S12 pulls out the needle to purge the gas from the syringe.

[0093] Repeat steps S11 and S12 three times to ensure that the residual gas inside the syringe and needle is the standard gas.

[0094] S13 Insert the syringe needle into the standard gas cylinder and draw a fixed amount of standard gas.

[0095] S14 pulls out the needle and moves the syringe vertically downwards above the air barrier membrane.

[0096] S15 inserts the syringe needle into the gas-isolating membrane, thus connecting the syringe with the chromatograph.

[0097] S16 rapidly injects the extracted standard gas into the chromatograph.

[0098] S17 Remove the needle.

[0099] Machine process:

[0100] With the S21 syringe core at the bottom, open the first valve and close the second valve to control the first electric plunger to draw standard gas from the standard gas tank to the required scale.

[0101] S22 closes the first valve and opens the second valve, controlling the first electric plunger to vent the gas from the syringe.

[0102] Repeat steps S21 and S22 three times to ensure that the residual gas inside the syringe, tubing, and needle is the standard gas.

[0103] S23 opens the first valve and closes the second valve, controlling the first electric thruster to draw standard gas from the standard gas cylinder to the required scale.

[0104] S24 controls the second electric actuator to insert the needle into the air-sealing membrane, close the first valve, and open the second valve.

[0105] S25 controls the first electric thruster to rapidly inject standard gas from the syringe into the chromatograph.

[0106] S26 controls the second electric actuator to pull the needle out of the air barrier membrane.

[0107] The process of removing and inserting the needle is complete.

[0108] Research and development concept:

[0109] Set technical parameters and purge air from the tubing and needle to improve the accuracy of the calibration gas. Avoid situations where air in the tubing and needle leads to poor calibration gas accuracy, i.e., large calibration gas error.

[0110] Technical contributions of this application:

[0111] The inventor's technical solution involves three sampling and discharging operations from a standard gas cylinder using a first electric plunger, syringe body, first solenoid valve, second solenoid valve, first tubing, and second tubing, thus purging air from the tubing and needle. The sampled standard gas is then injected into the chromatograph using a second electric plunger and needle. Two electric plungers are used, and the syringe body and needle are separate. The first electric plunger, syringe body, first solenoid valve, second solenoid valve, first tubing, and second tubing are used for sampling; the first electric plunger, syringe body, second electric plunger, second tubing, second solenoid valve, and needle are used for discharging. This part is fundamentally different from existing technical solutions and is not easily conceived.

[0112] The power-driven telescopic rod can be an electric push rod, a hydraulic telescopic rod, or a pneumatic telescopic rod, etc. Electric push rods, hydraulic telescopic rods, or pneumatic telescopic rods have their own stroke control mechanism, which can extend or retract to the corresponding position according to the preset stroke parameters. This part belongs to the prior art and will not be described in detail.

[0113] The power-driven valve can be an electric valve, a pneumatic valve, or a hydraulic valve, etc. This part belongs to the prior art and will not be described in detail.

[0114] The pipeline can be a telescopic pipeline or a flexible pipeline, such as a hose, a snake-skin hose, or a telescopic sleeve. This part is existing technology and will not be described in detail.

[0115] Inventive concept:

[0116] Simulates the manual gas calibration process to automate the calibration work. The machine's operation is standardized, uniform, and reliable, avoiding calibration errors caused by factors in the manual calibration process.

[0117] After this application had been running internally for a period of time, the beneficial aspects reported by on-site technicians were:

[0118] ① Stronger stability

[0119] ② Higher accuracy

[0120] Table 1 shows the oil chromatographic test data of a certain standard oil prepared using a fully automated chromatograph, which is used as the standard data. Tables 2 and 3 show the oil chromatographic test data using manual injection and machine injection, respectively. Comparative analysis shows that the test data using this device exhibits good repeatability and relatively small deviation.

[0121] Table 1: Test Data of Fully Automated Chromatography System

[0122]

[0123] Table 2: Data from the manual sample injection test

[0124]

[0125] Table 3: Machine Sample Injection Test Data

[0126]

[0127] Currently, the technical solution of this invention has undergone pilot testing, which is a small-scale trial of the product before large-scale mass production. After the pilot testing was completed, a user survey was conducted on a small scale, and the survey results showed that user satisfaction was high. Now, preparations have begun for the formal production and industrialization of the product (including intellectual property risk warning surveys).

Claims

1. An apparatus for obtaining a standard gas, characterized in that: The device includes a frame, a controller, a first power-driven telescopic rod, a second power-driven telescopic rod, a syringe body, a needle, a first power-driven valve, a second power-driven valve, a first tubing, and a second tubing. The fixed parts of the first and second power-driven telescopic rods, as well as the container of the syringe body, are all fixedly connected to the frame. The movable part of the first power-driven telescopic rod is fixedly connected to the push rod of the syringe body. The movable part of the second power-driven telescopic rod is fixedly connected to the needle. One end of the first tubing is connected to the container, and the other end is connected to a standard gas cylinder. The first power-driven valve is on the first tubing. One end of the second tubing is connected to the container, and the other end is connected to the needle. The second power-driven valve is on the second tubing. The control terminals of the controller are electrically connected to the control terminals of the first and second power-driven telescopic rods, the first and second power-driven valves, and the second power-driven valve. The syringe body includes a container and a push rod, which is movably connected to the container and used for sampling or dispensing.

2. The apparatus for obtaining standard gas according to claim 1, characterized in that: It also includes a standard gas cylinder, and the first pipeline is connected to the standard gas cylinder.

3. The apparatus for obtaining standard gas according to claim 2, characterized in that: The standard gas cylinder is connected to the frame.

4. The apparatus for obtaining standard gas according to claim 1, characterized in that: The controller is a microcontroller or industrial computer, the power-driven telescopic rod is an electric push rod, the power-driven valve is a solenoid valve, and the pipeline is a flexible hose.

5. A system for obtaining standard gas, characterized in that: The apparatus comprising any one of claims 1 to 4 further comprises an initialization module, a preprocessing module, a first stretching module, and a first contraction module. The initialization module is used by the controller to obtain the sampling scale and the number of cycles. The controller sends the sampling scale to the first power-driven telescopic rod, and the first power-driven telescopic rod obtains the sampling scale and uses it as the retraction stroke parameter. The preprocessing module is used by the controller to execute the first stretching module, and to execute the first contraction module and the first stretching module sequentially according to the number of cycles; The first extension module is used by the controller to send a closing command to the first power-driven valve and an opening command to the second power-driven valve. The first power-driven valve receives the closing command and closes, and the second power-driven valve receives the opening command and opens. The controller sends an extension command to the first power-driven telescopic rod. The first power-driven telescopic rod receives the extension command and controls its movable part to extend according to the preset first extension stroke parameters. The extended movable part of the first power-driven telescopic rod drives the push rod of the syringe body to move. The moving push rod approaches the container until it presses the container. The first power-driven telescopic rod knows that the extension is complete and informs the controller. The first contraction module is used by the controller to send an open command to the first power-driven valve and a close command to the second power-driven valve. The first power-driven valve receives the open command and opens, and the second power-driven valve receives the close command and closes. The controller sends a contraction command to the first power-driven telescopic rod. The first power-driven telescopic rod receives the contraction command and controls its movable part to contract according to the contraction stroke parameters. The contracted movable part of the first power-driven telescopic rod drives the push rod of the syringe body to move. The moving push rod moves away from the container until it reaches the position corresponding to the contraction stroke parameters. The first power-driven telescopic rod knows that the contraction is complete and informs the controller.

6. A system for obtaining standard gas according to claim 5, characterized in that: It also includes a sampling module, which is used by the controller to execute the first shrinkage module and complete the sampling after the preprocessing module has been executed.

7. A system for obtaining standard gas according to claim 6, characterized in that: It also includes a second extension module and an injection module. The second extension module is used by the controller to send the extension command to the second power-driven telescopic rod. The second power-driven telescopic rod receives the extension command and controls its movable part to extend according to the preset second extension stroke parameters. The extended movable part of the second power-driven telescopic rod drives the needle to move. The moving needle approaches and pierces the air barrier membrane. The second power-driven telescopic rod knows that the extension is complete and informs the controller. The injection module is used by the controller to execute the first extension module and complete the sorting after the sampling module and the second extension module have been executed.

8. A system for obtaining standard gas according to claim 7, characterized in that: It also includes a second contraction module, which is used to send a contraction command to the second power-driven telescopic rod after the injection module is executed. The second power-driven telescopic rod receives the contraction command and contracts its movable part. The second power-driven telescopic rod knows that the contraction is complete and informs the controller.

9. A system for obtaining standard gas according to claim 5, characterized in that: It also includes an input device, the controller is connected to and communicates with the input device, and an initialization module, which is also used to input the sampling scale and the number of cycles into the input device. The input device obtains the sampling scale and the number of cycles and sends them to the controller.

10. A system for obtaining standard gas according to claim 5, characterized in that: It also includes a chromatograph, with a frame mounted on the chromatograph, a needle inserted into or pulled out of the chromatograph's gas-isolating membrane, and a controller connected to and communicating with the chromatograph.

Images