阅读说明：本技术 瓶装纯气和混合气的自动化充装装置及其充装控制方法 (Automatic filling device for bottled pure gas and mixed gas and filling control method thereof ) 是由 黄波 杨军 周廷志 刘洋 袁明星 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种瓶装纯气和混合气的自动化充装装置及其充装控制方法,自动化充装装置包括气源供应机构、配气阀组、充装台、控制单元、备用气源,所述备用气源设置在气源供应机构和充装台之间；还包括用以连接气源供应机构、配气阀组、充装台和备用气源的管道及安装在管道组件上的监控组件。充装控制方法包括以下步骤：通过用户在计算机控制单元选择充装参数,并由控制单元控制自动化。本发明能够有效降低充装温度、高精度温度预测与补偿、自动切换充装台提高生产效率、适应多种压力等级产品、高纯气生产、多种组分的混合气生产、原料余气回收、减少低温泵频繁启停、多种产品的预先定义,实现一键式生产。(The invention discloses an automatic filling device for bottled pure gas and mixed gas and a filling control method thereof, wherein the automatic filling device comprises a gas source supply mechanism, a gas distribution valve group, a filling platform, a control unit and a standby gas source, wherein the standby gas source is arranged between the gas source supply mechanism and the filling platform; the device also comprises a pipeline used for connecting the air source supply mechanism, the air distribution valve group, the filling platform and the standby air source, and a monitoring assembly arranged on the pipeline assembly. The filling control method comprises the following steps: the filling parameters are selected by the user at the computer control unit and controlled automatically by the control unit. The invention can effectively reduce the filling temperature, predict and compensate the high-precision temperature, automatically switch the filling platform to improve the production efficiency, adapt to various pressure grade products, produce high-purity gas, produce mixed gas with various components, recover residual gas of raw materials, reduce frequent start and stop of a low-temperature pump and predefine various products, and realize one-key production.)

1. Bottled pure gas fills device with the automation of gas mixture, its characterized in that: the device comprises an air source supply mechanism (1), an air distribution valve group (15), a filling platform (22), a control unit and a standby air source (10), wherein the standby air source (10) is arranged between the air source supply mechanism (1) and the filling platform (22); the device also comprises a pipeline used for connecting the air source supply mechanism (1), the air distribution valve group (15), the filling platform (22) and the standby air source (10), and a monitoring assembly arranged on the pipeline assembly.

2. The automatic filling device of bottled pure gas and mixed gas according to claim 1, wherein: the gas source supply mechanism (1) comprises a low-temperature liquid storage tank (2) for storing liquid raw materials, a liquid outlet of the low-temperature liquid storage tank (2) is connected to a low-temperature liquid pump (3) through a pipeline, and a thermal expansion valve and a low-temperature ball valve are mounted on the pipeline; two interfaces are arranged at the inlet of the low-temperature liquid pump (3), one interface is connected with a liquid outlet pipeline through an elastic hose (4), and the other interface is connected back to the low-temperature liquid storage tank (2) through a return pipeline.

3. The automatic filling device of bottled pure gas and mixed gas according to claim 1, wherein: the gas source supply mechanism (1) comprises a supply pipeline for producing supplied materials or a steel cylinder for storing gaseous raw materials, and the outlet of the supply pipeline for producing the supplied materials or the steel cylinder for storing the gaseous raw materials is connected to the gas distribution valve group (15).

4. The automatic filling device of bottled pure gas and mixed gas according to claim 2, wherein: and a thermostatic expansion valve and a low-temperature ball valve are also arranged on the return pipeline, and a temperature sensor (6) is also arranged on the return pipeline.

5. The automatic filling device of bottled pure gas and mixed gas according to claim 2, wherein: the outlet of the low-temperature liquid pump (3) is connected to the water bath type vaporizer (5-1) or the air bath type vaporizer (5-2) through a one-way valve (21); the outlet of the air bath type vaporizer (5-2) is connected with an air distribution valve group (15); the low-temperature liquid pump (3) connected to the water bath type vaporizer (5-1) is provided with two outlets which are respectively connected back to the low-temperature liquid storage tank (2) and connected into the water bath type vaporizer (5-1); and the inlet and outlet pipelines are connected with monitoring components.

6. The automatic filling device of bottled pure gas and mixed gas according to claim 5, wherein: the outlet pipeline of the low-temperature liquid pump (3) is also provided with a bypass pipeline (14) bypassing the water bath type vaporizer (5-1) or the inlet of the water bath type vaporizer (5-1) and directly communicated with the outlet of the water bath type vaporizer (5-1) or the water bath type vaporizer (5-1), the bypass pipeline (14) is provided with an adjusting valve, and the merged pipeline is provided with a temperature sensor (6).

7. The automatic filling device of bottled pure gas and mixed gas according to claim 1, wherein: the control unit comprises a cloud server, an electric control unit and a computer control unit which are controlled by the cloud server.

8. The automatic filling device of bottled pure gas and mixed gas according to any one of claims 1 or 5, wherein: the monitoring assembly comprises a pressure sensor (7), a temperature sensor (6), a safety valve (9) and a vent valve (8) for guaranteeing the pressure safety of the pipeline.

9. The automatic filling device of bottled pure gas and mixed gas according to claim 1, wherein: the standby air source (10) comprises a filling container (11), an air inlet pipeline of the filling container (11) is connected to an outlet of the vaporizer (5), and an air outlet pipeline of the standby air source (10) is connected to the air distribution valve group (15).

10. The automated bottled pure gas and mixed gas filling apparatus according to claim 9, wherein: the outlet pipeline of the standby air source (10) is also connected to an instrument air supply pipeline of the supply system, and a pressure gauge and a pressure reducing valve are arranged on the supply pipeline.

11. The automatic filling device of bottled pure gas and mixed gas according to claim 1, wherein: the gas distribution valve group (15) comprises a plurality of raw gas pipelines (16), a main bus (17) connected to each raw gas pipeline (16), and an ambient temperature sensor (6); the main bus bar (17) is connected with an emptying pipeline through an emptying valve (8) and is connected with a vacuum pipeline through a vacuum valve.

12. The automated bottled pure gas and mixed gas filling apparatus according to claim 11, wherein: the outlet of the main bus bar (17) is connected to the filling workbench through a filling valve, the main bus bar (17) is connected with one or more filling valves, a sub bus bar (23) is connected to the rear end of each filling valve, and a pressure sensor (7) is mounted on each sub bus bar (23).

13. The automated bottled pure gas and mixed gas filling apparatus according to claim 11, wherein: each inlet pipeline of the raw material gas pipelines (16) is provided with a pneumatic valve and a one-way valve (21), and a branch pipeline is arranged between the pneumatic valve and the one-way valve (21) and is connected with an emptying branch pipe (20).

14. The automated bottled pure gas and mixed gas filling apparatus according to claim 12, wherein: a plurality of safety valves (9) with different pressure grades are mounted on the sub bus bar (23), pneumatic valves are mounted between the safety valves (9) and the sub bus bar (23), the pneumatic valves corresponding to the matched safety valves (9) are automatically opened according to the pressure grade of a produced product, and the pneumatic valves corresponding to the rest safety valves (9) are closed; the sub-busbars (23) are connected to the respective filling stations (22) by means of pipes, each of which is fitted with a pneumatic valve; the sub-bus bar (23) is connected with a vent pipeline and a vacuum pipeline, and the pipeline is provided with a corresponding valve for controlling the connection state of the pipeline.

15. The automatic filling device of bottled pure gas and mixed gas according to any one of claims 12 or 14, wherein: two filling joints (24) are simultaneously installed on the sub bus bar (23) to respectively match with the filling of the packaging grids or the filling of the bulk bottles assembled on the tray; a lifting protective cover is arranged on the filling platform (22); and the filling joint (24) can be lifted.

16. The filling control method comprises the following steps: the method is characterized by comprising the following steps:

a, a user selects filling parameters from a computer control unit, a cloud server generates a product formula creating result according to a request and transmits the product formula creating result back to the computer control unit, and the computer control unit synchronizes the formula into an electrical control unit;

b: the electric control unit automatically controls the gas distribution valve group (15) to complete the assembly of a raw material gas incoming path according to a first group of products and stations selected by a user, and performs emptying and vacuum process operation. Then, the gas distribution valve group (15) of the automatic control gas source supply mechanism (1) sequentially supplies and fills raw materials according to products;

c, in the production process of the step B, a user can select a second group of stations and products, and the electric control unit automatically controls the gas distribution valve group (15) and the vacuum pump (25) to finish the emptying and vacuum process operation of the corresponding sub-bus (23) according to the second group of products and stations selected by the user, and waits for the completion of the filling of the first group;

and D, after the filling in the step B is finished, controlling the gas distribution valve group (15) to automatically fill the second group of products.

17. The fill control method of claim 16, wherein: and (3) for the low-temperature storage tank serving as the gas source supply mechanism (1), before filling in the steps B and D, opening a liquid inlet valve and a gas return valve of the low-temperature pump to finish cooling of a pump body of the low-temperature liquid pump (3), and starting the low-temperature liquid pump (3) to supply raw materials after cooling is finished.

18. The fill control method of claim 17, wherein: when gas filling is started, the low-temperature liquid pump (3) and the standby gas source (10) supply raw materials to the gas distribution valve bank (15) simultaneously; when the pressure in the steel cylinder to be charged and the pressure of the buffer container are smaller than the set threshold value, the standby gas source (10) is closed; and after the filling is finished, the standby gas source (10) is opened, the low-temperature liquid pump (3) replenishes the standby gas source to the target pressure and supplies for the next filling, and the liquid outlet valve is closed and the gas return valve is opened after the low-temperature liquid pump (3) is stopped to recover the raw material gas.

19. The fill control method of claim 17, wherein: in the filling process, for a bypass pipeline (14) on the gasifier, the electric control unit adjusts the opening degree of a valve on the bypass pipeline in real time according to the gas temperature in an outlet pipeline of the gasifier so as to ensure that the raw gas entering the gas distribution valve group (15) is at a low temperature, reduce the temperature rise of a steel cylinder and improve the filling efficiency.

20. The fill control method of claim 17, wherein: when filling is finished, if multiple paths of feed gas are used for supplying gas, after filling of each gas is finished, each feed gas pipeline (16) opens a vent valve (8) divided between a pneumatic valve and a one-way valve (21) of the feed gas pipeline, filling pressure is reduced, and the pipeline is emptied.

21. The fill control method of claim 17, wherein: in the filling process, the temperature in the gas cylinder is predicted according to the ambient temperature sensor (6) and the magnetic temperature sensor (6) attached to the steel cylinder, and the temperature compensation of the filling pressure is performed according to a gas state equation according to the difference between the predicted temperature and the reference temperature defined by the product.

22. The fill control method of claim 21, wherein: the temperature compensation adopts multi-parameter real gas state equations such as MBWR (modified Benedict-Webb-Rubin) and Bender and a mixed model thereof, the parameters are fitting results based on experimental data, and the average deviation of the state equation calculation results and the experimental data is within 1%.

Technical Field

The invention belongs to the technical field of automatic high-pressure filling, and particularly relates to an automatic filling device for bottled pure gas and mixed gas and a filling control method thereof.

Background

In industrial production, various industrial pure gas, high-purity gas and mixed gas are often applied, for example, carbon dioxide arc welding can obviously improve welding efficiency, and argon arc welding can reduce welding spatter, reduce polishing and the like. Various industrial pure gases also include, for example: pure oxygen, nitrogen, argon and the like, and has excellent service performance and wide application prospect.

The production of bottled pure gas, high-purity gas and mixed gas adopts manual filling all the time, the safety risk of over-temperature and over-pressure mainly exists when the pure gas is produced, meanwhile, the common distance between a raw material supply area and a filling platform is far, and the workload of workers is large; the process of emptying, vacuumizing and replacing is complicated during the production of high-purity gas, the temperature of the steel cylinder rises due to compression heat during the production of mixed gas, the temperature compensation is carried out by manually checking the table according to the product in real time, the requirement on the skill of personnel is high, the culture period is long, and the product quality fluctuation is large. In summer, due to high ambient temperature, the temperature of the gas cylinder is easily higher than 60 ℃ required by national standard due to compression heat in the filling process, and the filling needs to be stopped or the filling speed is lower to avoid the too fast temperature rise.

Therefore, in the prior art, various automatic filling devices have appeared, and these filling devices mainly adopt the cooperation of a low-temperature storage tank, a pipeline, a vaporizer and a gas distribution valve group, and complete the automatic filling process through a PLC and a corresponding human-computer interaction page.

However, in the prior art, various types of automatic filling equipment currently available are mainly divided into two types, the first type occupies the majority, and safety risks are eliminated by monitoring over-temperature and over-pressure and automatically stopping a pump; the second type has automatic raw material supply, temperature compensation and automatic vacuum pumping, but does not solve the compatibility problem of various raw material supply types, still has low production efficiency and can not ensure the product purity. The main reasons are that only low-temperature liquefied gas raw materials are used, the temperature compensation precision is not high, raw material selection and parameter setting are required for each production, ternary mixed gas is produced at most, the filling temperature cannot be reduced, a standby gas source is not provided to improve the filling speed, parallel filling cannot be performed, high-purity products cannot be produced, and the like. High-precision low-temperature filling of various mixed gases cannot be achieved, and production efficiency is low.

Disclosure of Invention

The invention aims to provide an automatic filling device and a filling control method for bottled pure gas and mixed gas, which solve the problems by providing a new filling device and a new filling method, improve the automation degree and the control precision, effectively reduce the filling temperature, predict and compensate the high-precision temperature, automatically switch the filling platform to improve the production efficiency, adapt to various pressure grade products, produce high pure gas, produce mixed gas with various components, recover raw material residual gas, reduce frequent start and stop of a low-temperature pump and predefine various products, and realize one-key production.

In order to achieve the purpose, the invention adopts the technical scheme that:

the automatic filling device for bottled pure gas and mixed gas comprises a gas source supply mechanism, a gas distribution valve group, a filling platform, a control unit and a standby gas source, wherein the standby gas source is arranged between the gas source supply mechanism and the filling platform; the device also comprises a pipeline used for connecting the air source supply mechanism, the air distribution valve group, the filling platform and the standby air source, and a monitoring assembly arranged on the pipeline assembly.

Further, the gas source supply mechanism comprises a low-temperature liquid storage tank for storing liquid raw materials, a liquid outlet of the low-temperature liquid storage tank is connected to the low-temperature liquid pump through a pipeline, and a thermostatic expansion valve and a low-temperature ball valve are mounted on the pipeline; two connectors are arranged at the inlet of the low-temperature liquid pump, one connector is connected with a liquid outlet pipeline through an elastic hose, and the other connector is connected back to the low-temperature liquid storage tank through a return pipeline.

Further, the gas supply mechanism comprises a cylinder for producing the incoming material supply pipeline or storing the gaseous raw material, and an outlet of the cylinder for producing the incoming material supply pipeline or storing the gaseous raw material is connected to the gas distribution valve bank.

Furthermore, a thermostatic expansion valve and a low-temperature ball valve are also arranged on the return pipeline, and a temperature sensor is also arranged on the return pipeline.

Further, the outlet of the low-temperature liquid pump is connected to the water bath type vaporizer or the air bath type vaporizer through a one-way valve; the outlet of the air bath type vaporizer is connected with an air distribution valve bank; the low-temperature liquid pump connected to the water bath type vaporizer is provided with two outlets which are respectively connected back to the low-temperature liquid storage tank and connected into the water bath type vaporizer; and the inlet and outlet pipelines are connected with monitoring components.

Furthermore, the outlet pipeline of the low-temperature liquid pump is also provided with a bypass pipeline which bypasses the inlet of the water bath type vaporizer or the water bath type vaporizer and is directly communicated with the outlet of the water bath type vaporizer or the water bath type vaporizer, the bypass pipeline is provided with a regulating valve, and the pipeline after the confluence is provided with a temperature sensor.

Further, the control unit comprises a cloud server, an electric control unit and a computer control unit which are controlled by the cloud server.

Further, the monitoring assembly comprises a pressure sensor, a temperature sensor, a safety valve and a vent valve for guaranteeing the pressure safety of the pipeline.

Further, the standby gas source comprises a filling container, a gas inlet pipeline of the filling container is connected to an outlet of the vaporizer, and a gas outlet pipeline of the standby gas source is connected to the gas distribution valve bank.

Furthermore, the spare gas source outlet pipeline is also connected to a gas supply pipeline of a supply system instrument, and a pressure gauge and a pressure reducing valve are installed on the supply pipeline.

Furthermore, the gas distribution valve group comprises a plurality of raw gas pipelines, a main bus connected to each raw gas pipeline and an ambient temperature sensor; the main bus bar is connected with an emptying pipeline through an emptying valve, and is connected with a vacuum pipeline through a vacuum valve.

Further, the main bus bar outlet is connected to the filling workbench through a filling valve, one or more filling valves are connected to the main bus bar, a sub bus bar is connected to the rear end of each filling valve, and a pressure sensor is mounted on each sub bus bar.

Furthermore, each inlet pipeline of the raw material gas pipelines is provided with a pneumatic valve and a one-way valve, a branch pipeline is arranged between the pneumatic valve and the one-way valve, and the branch pipeline is connected with an emptying branch pipe.

Furthermore, a plurality of safety valves with different pressure grades are installed on the sub bus bar, pneumatic valves are installed between the safety valves and the sub bus bar, the pneumatic valves corresponding to the matched safety valves are automatically opened according to the pressure grade of the produced product, and the pneumatic valves corresponding to the rest safety valves are closed; the sub-busbars are connected to each filling platform through pipelines, and each pipeline is provided with a pneumatic valve; the sub-bus bar is connected with an emptying pipeline and a vacuum pipeline, and the pipeline is provided with a corresponding valve for controlling the connection state of the pipeline.

Furthermore, two filling joints are simultaneously installed on the sub bus bar so as to respectively match with the filling of the packaging grids or the filling of bulk bottles assembled on the tray; a lifting protective cover is arranged on the filling platform; and the filling joint can be lifted.

Meanwhile, the invention also discloses a filling control method, which can effectively improve the filling efficiency, and in order to achieve the technical purpose, the specific technical method comprises the following steps:

the filling control method comprises the following steps: the method comprises the following steps:

a, a user selects filling parameters from a computer control unit, a cloud server generates a product formula creating result according to a request and transmits the product formula creating result back to the computer control unit, and the computer control unit synchronizes the formula into an electrical control unit;

b: the electric control unit automatically controls the gas distribution valve group to complete the path of the combined feed gas according to the first group of products and stations selected by a user, and performs emptying and vacuum process operation. Then automatically controlling a gas distribution valve group of a gas source supply mechanism to sequentially supply and fill raw materials according to the product;

c, in the production process of the step B, a user can select a second group of stations and products, and the electric control unit automatically controls the gas distribution valve group and the vacuum pump to finish corresponding sub-busbar emptying and vacuum process operation according to the second group of products and stations selected by the user and waits for the first group to be filled;

and D, after the filling in the step B is finished, controlling the gas distribution valve group to automatically fill the second group of products.

Further, for the low-temperature storage tank used as an air source supply mechanism, before filling in the steps B and D, a liquid inlet valve and an air return valve of the low-temperature pump are opened to finish cooling of a pump body of the low-temperature liquid pump, and the low-temperature liquid pump is started to supply raw materials after cooling is finished.

Further, when gas filling is started, the low-temperature liquid pump and the standby gas source supply raw materials to the gas distribution valve bank simultaneously; closing the standby gas source when the pressure in the steel cylinder to be charged and the pressure of the buffer container are smaller than a set threshold value; and after the filling is finished, the standby gas source is opened, the low-temperature liquid pump replenishes the target pressure to supply for the next filling, and the liquid outlet valve is closed and the gas return valve is opened after the low-temperature liquid pump stops working to recover the raw material gas.

Furthermore, in the filling process, for a bypass pipeline on the gasifier, the electric control unit adjusts the opening degree of a valve on the bypass pipeline in real time according to the temperature of gas in an outlet pipeline of the gasifier so as to ensure that the raw gas entering the gas distribution valve group is at a low temperature, reduce the temperature rise of a steel cylinder and improve the filling efficiency.

Further, when filling is finished, if multiple paths of feed gas are adopted for supplying gas, after filling of each gas is finished, each feed gas pipeline opens a vent valve which is divided between a pneumatic valve and a one-way valve of each feed gas pipeline, filling pressure is reduced, and the pipelines are emptied.

Furthermore, in the filling process, the temperature in the gas cylinder is predicted according to an ambient temperature sensor and a magnetic temperature sensor attached to the steel cylinder, and the temperature compensation of the filling pressure is performed according to a gas state equation and the difference between the predicted temperature and the reference temperature defined by the product.

Furthermore, the temperature compensation adopts multi-parameter real gas state equations such as MBWR (modified connected-Webb-Rubin) and Bender and a mixed model thereof, parameters of the multi-parameter real gas state equations are fitting results based on experimental data, and the average deviation of the state equation calculation results and the experimental data is within 1%.

Compared with the prior art, the invention has the advantages that: firstly, on the basis of a common automatic filling machine, a standby gas source is additionally arranged between a gas source supply mechanism and a filling mechanism, the standby gas source capable of storing filling gas is arranged in the standby gas source, after the first inflation is completed, the standby gas source is filled with the body to be inflated, the body to be inflated of a packaging lattice can be used as the standby gas source, and a low-temperature liquid pump and the packaging lattice can be used as the gas source to improve the filling speed in the next filling; and the low-temperature liquid pump does not need to be frequently started and stopped for the requirements of tiny amount of inflation and the requirements of gas supply of instruments, cylinders and the like, thereby effectively prolonging the service life of the low-temperature liquid pump.

In addition, the invention arranges a bypass pipeline on the gasifier, after the low-temperature liquid is introduced into the gasifier, the raw material entering the gas distribution valve bank is always at a lower temperature by controlling the liquid flow of the bypass pipeline, thereby ensuring that the charging in summer is not over 60 ℃ limited by national standard.

Meanwhile, the computer control system and the cloud server are used, so that a user is allowed to quickly complete the creation and synchronization of the product formula, the production can be completed in one key mode only by selecting the product during production, and the manual load is reduced.

Meanwhile, the invention uses an environment temperature sensor and a temperature sensor attached to the outer wall of the steel cylinder, combines a high-precision real gas state equation, accurately completes temperature compensation and improves the filling quality.

Meanwhile, the invention can produce common pure gas, high-purity gas and mixed gas with more than 3 components, and has strong function and high flexibility.

Moreover, the invention provides a plurality of filling stations, the bus bars are respectively communicated with different filling stations through different confluence branch circuits, and an emptying valve, a vacuum valve and the like which are used for ensuring safety on each confluence branch circuit are mutually independent, each group can independently perform emptying, vacuum and filling, and the invention has the advantages that the second group can synchronously complete part of procedures when the first group is filled, the second group can be automatically filled after the first group is filled, the production is not interrupted, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a first schematic view of an automated filling apparatus system for providing bottled pure gas and mixed gas according to the present invention;

FIG. 2 is a schematic view of a second system for providing an automated filling apparatus for bottled pure gas and mixed gas according to the present invention;

FIG. 3 is a third schematic view of the system of the present invention for providing an automated filling device of bottled pure gas and mixed gas;

FIG. 4 is a fourth schematic view of the system of the present invention for providing an automated filling apparatus for bottled pure gas and mixed gas;

FIG. 5 is a fifth schematic view of the system of the present invention for providing an automated filling device of bottled pure gas and mixed gas;

FIG. 6 is a schematic diagram of a water bath vaporizer used in an automatic filling apparatus for bottled pure gas and mixed gas according to the present invention;

FIG. 7 is a schematic diagram of an air bath vaporizer for an automatic filling apparatus for bottled pure gas and mixed gas according to the present invention;

FIG. 8 is a first schematic view of a valve block of the present invention for providing an automatic filling device of bottled pure gas and mixed gas;

fig. 9 is a second structural diagram of a gas distribution valve assembly of the automatic filling device for bottled pure gas and mixed gas according to the present invention.

Reference numerals: 1-gas source supply mechanism, 2-low-temperature liquid storage tank, 3-low-temperature liquid pump, 4-elastic hose, 5-vaporizer, 5-1-water bath vaporizer, 5-2-air bath vaporizer, 6-temperature sensor, 7-pressure sensor, 8-vent valve, 9-safety valve, 10-standby gas source, 11-filling container, 12-low-temperature liquid pump inlet interface, 13-low-temperature liquid pump outlet, 14-bypass pipeline, 15-gas distribution valve group, 16-raw gas pipeline, 17-main manifold, 18-vacuum pipeline, 19-vent pipeline, 20-vent branch pipe, 21-one-way valve, 22-filling platform, 23-sub manifold, 24-filling joint, 25-vacuum pump, 26-big valve, 27-small valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," "third," and the like, if any, are only used to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

As shown in fig. 1-4, the automatic filling device for bottled pure gas and mixed gas comprises a gas source supply mechanism 1, a gas distribution valve group 15, a filling platform 22, a control unit, and a standby gas source 10, wherein the standby gas source 10 is arranged between the gas source supply mechanism 1 and the filling platform 22; the device also comprises pipelines for connecting the air supply mechanism 1, the air distribution valve group 15, the filling platform 22 and the standby air supply 10, and a monitoring assembly arranged on the pipeline assembly.

Compared with the prior art, the automatic filling device for bottled pure gas and mixed gas additionally provides a standby gas source 10, the standby gas source 10 is arranged between the gas source supply mechanism 1 and the filling mechanism, and a container assembly capable of storing a to-be-filled gas is arranged in the standby gas source 10 and used for storing a certain amount of gasified to-be-filled gas as the standby gas source 10.

The gas source supply mechanism 1 comprises a low-temperature liquid storage tank 2 for storing liquid raw materials, a liquid outlet of the low-temperature liquid storage tank 2 is connected to a low-temperature liquid pump 3 through a pipeline, and a thermal expansion valve and a low-temperature ball valve are mounted on the pipeline; the inlet interfaces of the cryogenic liquid pump 3 are two, one of the two interfaces is connected with the liquid outlet pipeline through the elastic hose 4, and the other interface is connected back to the cryogenic liquid storage tank 2 through a return pipeline.

Similarly, the gas supply mechanism 1 can be directly connected to a production supply line or a cylinder storing gaseous raw material, and an outlet of the production supply line or the cylinder storing gaseous raw material is connected to the valve block 15.

A thermostatic expansion valve and a low-temperature ball valve are also arranged on the return pipeline, and a temperature sensor 6 is also arranged on the return pipeline.

As shown in fig. 6 to 7, the outlet of the cryogenic liquid pump 3 is connected to the water bath vaporizer 5-1 or the air bath vaporizer 5-2 via the check valve 21; the outlet of the air bath type vaporizer 5-2 is connected with an air distribution valve group 15; the outlets of the low-temperature liquid pump 3 connected to the water bath type vaporizer 5-1 comprise two outlets which are respectively connected back to the low-temperature liquid storage tank 2 and connected into the water bath type vaporizer 5-1; and the inlet and outlet pipelines are connected with monitoring components.

The outlet pipeline of the low-temperature liquid pump 3 can also be provided with a bypass pipeline 14 which bypasses the water bath type vaporizer 5-15 or the inlet of the water bath type vaporizer 5-15 and is directly communicated with the outlet of the water bath type vaporizer 5-15 or the water bath type vaporizer 5-15, the bypass pipeline 14 is provided with a regulating valve, and the pipeline after the confluence is provided with a temperature sensor 6.

The control unit comprises a cloud server, an electric control unit and a computer control unit which are controlled by the cloud server.

The monitoring assembly comprises a pressure sensor 7 and a temperature sensor 6, as well as a safety valve 9 and a blow-down valve 8 for securing the pipeline pressure. The temperature sensor 6 is installed mainly behind the main passage of the carburetor 5. The system automatically monitors the filling temperature, adjusts the temperature of the air source and controls the air supply speed through the frequency converter, so that the filling temperature does not exceed the temperature specified by the national standard, and if the filling temperature exceeds the temperature specified by the national standard, the filling is stopped immediately. The balance time is set in the filling, emptying and vacuum processes in consideration of the flow capacity of pipelines and valves, and the pressure after balance is used as the standard for whether each process flow is finished or not. The detection sensor further comprises a pressure sensor 7, the pressure sensor 7 mainly adopts a pressure gauge and is also installed behind the vaporizer 5, the pressure sensor 7 is mainly used for detecting the pressure state in the pipeline, a manual emptying valve 8 is arranged at the corresponding position of the pressure gauge, and the phenomenon that the pipeline is broken by too much gas to be inflated after vaporization in the pipeline is avoided.

The standby air source 10 comprises a filling container 11, an air inlet pipeline of the filling container 11 is connected to an outlet of the vaporizer 5, and an air outlet pipeline of the standby air source 10 is connected to an air distribution valve group 15. After the back-up gas source 10 is completely filled, it can be used as the back-up gas source 10, and for a small amount of filling, for example, 10% Ar + 90% N2, the argon gas in the back-up gas source 10 can be used directly without separately activating the argon pump. Only a small amount of filling space remains, and at this time, if the conventional automatic filling apparatus is used, the cryogenic liquid pump 3 needs to be restarted to pump out the liquefied gas stored in the cryogenic liquid storage tank 2, vaporize the liquefied gas, and refill the liquefied gas into the cylinder. And the service life of the cryogenic liquid pump 3 can not only be seriously influenced by frequent start and stop of the cryogenic liquid pump 3, and the volume of the liquefied condensed gas after being re-gasified is hundreds of times of that of the liquefied state, so that a small amount of gas taken out at one time can not be accurately controlled, the redundant gas can only be subjected to evacuation treatment, and the filling cost for a small amount of gas is too high. While the alternate gas source 10 solves this problem well.

The outlet pipeline of the standby air source 10 is also connected to an instrument air supply pipeline of the supply system, and a pressure gauge and a pressure reducing valve are arranged on the supply pipeline. The gas stored in the backup gas source 10 can also be used as a gas supply source for instruments and meters, various industrial gases are inevitably adopted in factories, such as a cylinder and the like, a certain amount of industrial gas is required to be used as a power source for expansion and contraction, and the backup gas source 10 can also be used as a gas source for the cylinder.

As shown in fig. 3 to 5 and fig. 8 to 9, the air distribution valve group 15 includes a plurality of raw gas pipelines 16, a main bus 17 connected to each raw gas pipeline 16, and an ambient temperature sensor 6; the main bus bar 17 is connected with an emptying pipeline through an 8-door emptying valve, and is connected with a vacuum pipeline through a vacuum valve.

The main bus bar 17 outlet is connected to the filling workbench through a filling valve, one or more filling valves are connected to the main bus bar 17, a sub bus bar 23 is connected to the rear end of each filling valve, and a pressure sensor 7 is mounted on each sub bus bar 23.

Each inlet pipeline of the plurality of raw material gas pipelines 16 is provided with an air-operated valve and a one-way valve 21, and a pipeline is divided between the air-operated valve and the one-way valve 21 and is connected with an emptying branch pipe 20.

As shown in fig. 3, the charge valves of the main manifold may be set in a mode of regulating valves; also, as shown in fig. 5, the way of the large valve 26 plus the small valve 27 is adopted, and when a small amount of refined filling is performed, compared with the mode of a single regulating valve, the filling accuracy can be effectively improved by adopting the small valve 27. During normal filling, the large valve 26 is opened for filling, and the filling efficiency is not influenced.

A plurality of safety valves 9 with different pressure grades are arranged on the sub bus bar 23, pneumatic valves are arranged between the safety valves 9 and the sub bus bar 23, the pneumatic valve corresponding to the matched safety valve 9 is automatically opened according to the pressure grade of the produced product, and the pneumatic valves corresponding to the rest safety valves 9 are closed; the sub-busbars 23 are connected to the various filling stations 22 by means of pipes, each of which is fitted with a pneumatic valve; the sub-bus 23 is connected to a vent and vacuum line with corresponding valves controlling its on-state.

Two filling joints 24 are simultaneously arranged on the sub bus bar 23 to respectively match with container grids for filling or bulk bottles assembled on the tray for filling; a lifting protective cover is arranged on the filling platform 22; and the filling connection 24 can be lifted.

The gas source supply mechanism 1 comprises a cryogenic liquid storage tank 2 and a cryogenic liquid pump 3 connected to an outlet pipeline of the cryogenic liquid storage tank 2, and the cryogenic liquid pump 3 is communicated with a vaporizer 5.

The filling control method comprises the following steps: the method comprises the following steps:

a, a user selects filling parameters from a computer control unit, a cloud server generates a product formula creating result according to a request and transmits the product formula creating result back to the computer control unit, and the computer control unit synchronizes the formula into an electrical control unit;

b: the electric control unit automatically controls the gas distribution valve group 15 to complete the path of the combined feed gas according to the first group of products and stations selected by the user, and performs the operations of emptying and vacuum process. Then the gas distribution valve group 15 of the automatic control gas source supply mechanism 1 sequentially supplies and fills raw materials according to products;

for the low-temperature storage tank adopted as the air source supply mechanism 1, before filling is started, a liquid inlet valve and an air return valve of the low-temperature pump are opened to finish cooling of a pump body of the low-temperature liquid pump 3, and after cooling is finished, the low-temperature liquid pump 3 is started to supply raw materials.

When gas filling is started, the low-temperature liquid pump 3 and the standby gas source 10 supply raw materials to the gas distribution valve group 15 at the same time; when the pressure in the steel cylinder to be charged and the pressure of the buffer container are smaller than the set threshold value, the standby gas source 10 is closed; and after the filling is finished, the standby gas source 10 is opened, the low-temperature liquid pump 3 replenishes the target pressure to be used for next filling, the liquid outlet valve is closed and the gas return valve is opened after the low-temperature liquid pump 3 is stopped, and the raw material gas is recovered.

In the filling process, for the bypass pipeline 14 on the gasifier, the electric control unit adjusts the opening degree of a valve on the bypass pipeline in real time according to the gas temperature in the outlet pipeline of the gasifier so as to ensure that the feed gas entering the gas distribution valve group 15 is at low temperature, reduce the temperature rise of a steel cylinder and improve the filling efficiency. In the filling process, the temperature in the gas cylinder is predicted according to the ambient temperature sensor 6 and the magnetic temperature sensor 6 attached to the steel cylinder, and the temperature compensation of the filling pressure is performed according to a gas state equation and the difference between the predicted temperature and the reference temperature defined by the product. The temperature compensation adopts multi-parameter real gas state equations such as MBWR (modified Benedict-Webb-Rubin) and Bender and a mixed model thereof, the parameters are fitting results based on experimental data, and the average deviation of the state equation calculation results and the experimental data is within 1%.

C, in the production process of the step B, a user can select a second group of stations and products, and the electric control unit automatically controls the gas distribution valve group 15 and the vacuum pump 25 to finish the emptying and vacuum process operation of the corresponding sub-bus 23 according to the second group of products and stations selected by the user, and waits for the completion of the filling of the first group;

and D, after the filling in the step B is finished, controlling the gas distribution valve group 15 to automatically fill the second group of products. When the filling is finished, if multiple paths of feed gas are used for supplying gas, after each gas is filled, each feed gas pipeline 16 opens the emptying valve 8 divided between the pneumatic valve and the one-way valve 21, the filling pressure is reduced, and the pipelines are emptied.

Example one

In practical use, if a single pure gas is used for filling, the gas source supply mechanism 1 can adopt that only one condensed liquefied pure gas exists. The air supply mechanism 1 and the filling mechanism are sequentially installed in place, then the air distribution valve group 15 and the pipeline are installed between the air supply mechanism 1 and the filling mechanism, and a standby air supply 10 is connected between the air supply mechanism 1 and the filling mechanism. The low-temperature storage tank is used for storing low-temperature liquefied gas, the outlet of the low-temperature storage tank is connected with a thermal expansion valve, a low-temperature pneumatic control ball valve, a hose and a filter to one end of the inlet of the low-temperature liquid pump 3, and the other end of the inlet of the low-temperature liquid pump 3 is connected with the hose, a temperature sensor 6, the thermal expansion valve, a manual emptying valve 8, the low-temperature pneumatic control ball valve and the thermal expansion valve and returns to the storage tank. The outlet of the low-temperature liquid pump 3 is connected with a check valve 21, a pressure gauge and a temperature sensor 6 to a standby gas source 10. Of course, depending on the particular individual pure gas, for example carbon dioxide, whose piping and vaporizer 5 differ slightly due to their own different characteristics, the carbon dioxide medium requires an electrically heated vaporizer 5.

In the process of filling single pure gas, because only one incoming gas source is provided, the gas distribution valve group 15 does not relate to the switching of multiple types of condensate and the switching of raw gas, and the structure of the gas distribution valve group is mainly used for maintaining the stability of the gas inlet pipeline and the gas charging pipeline. And every single pure gas fills the mouth and can set up a plurality of exports, for example divide into two sets of exports with the pipeline that the air supply converges, every way connects has solitary unloading, vacuum valve, every group can carry out unloading, vacuum and filling alone, the advantage lies in filling the in-process in first group, can utilize vacuum pump 25 to carry out preliminary treatment such as evacuation to the pipeline of second group, can carry out second group automatically and fill after first group fills and accomplish, improves production efficiency.

The low-temperature liquefied gas in liquid state is led out from the low-temperature storage tank, is pressurized by the low-temperature liquid pump 3, and is led into the vaporizer 5, the vaporizer 5 generally adopts an air bath vaporizer 5-2, and the air bath vaporizer 5-2 is a common energy-saving auxiliary device and is not described much here. The gas in the condensed state undergoes a transition from the liquid state to the gaseous state via the vaporizer 5, during which a severe expansion of the gas volume occurs, typically several hundred times the gas volume in the condensed state of the liquid state. At this moment, each pressure gauge on the pipeline needs to be monitored, and the pipeline damage or the exceeding of the design pressure caused by the gas in the expansion process is avoided.

Meanwhile, the temperature sensor 6 is also needed to effectively monitor the room temperature, the pipeline temperature and the filling temperature. The room temperature, the pipeline temperature and the filling temperature all have different degrees of influence on the filling pressure. In order to be different from other common automatic inflation equipment on the market and more accurately fill a steel cylinder or other containers 11 to be filled, the invention also designs thermodynamic calculation according to the temperature of the temperature sensor 6 and the room temperature and temperature compensation for filling pressure. The temperature compensation adopts multi-parameter real gas state equations such as MBWR (modified Benedict-Webb-Rubin) and Bender and a mixed model thereof, the parameters are fitting results based on experimental data, and the average deviation of the state equation calculation results and the experimental data is within 1%.

After the first filling is completed, the filling valve of the filling station 22 is closed and the cryogenic tank continues to be supplied with gas until the backup gas source 10 of the backup gas source 10 continues to be filled. And then the gas supply ball valve of the low-temperature storage tank is cut off, and the gasified gas to be charged in the pipeline can be still existed in the pipeline, at the moment, the bypass valve is opened, and the residual gas to be charged in the pipeline is introduced into the low-temperature storage tank again. On one hand, the waste is avoided, and the gases are re-introduced into the low-temperature environment and re-condensed into liquid; on the other hand, the risk that the pipeline is burst due to excessive residual gas in the pipeline is effectively avoided, and in the prior art, in order to avoid the situation, the gas is usually simply discharged into the atmosphere.

Similarly, if the target factory has the production incoming gas, the production incoming gas can be directly connected to the production line, so that the devices such as the low-temperature storage tank, the low-temperature liquid pump 3, the vaporizer 5 and the like can be omitted, and the production line can be directly connected to the gas distribution valve group 15. Similarly, when only a small amount of rare gas is filled, only a storage container such as a steel cylinder can be directly provided. The equipment and storage cost is reduced.

Example two

In actual use, if multiple paths of feed gas are adopted, the gas source supply mechanism 1 has a plurality of low-temperature storage tanks for storing multiple condensed liquefied pure gases respectively. And because the air supply mechanism 1 adopts various condensed liquid pure gases as the air supply, a plurality of different low-temperature storage tanks are needed to store different pure gases respectively. And each low-temperature storage tank is correspondingly provided with a standby air source 10, and the opening and closing relationship between the filling platform 22 and the air inlet pipeline is controlled by arranging an air distribution valve group 15. Here, the filling stations 22 may be provided in several numbers, and the single incoming gas or the mixed incoming gas is mainly controlled by the gas distribution valve group 15.

Compared with single-path pure gas, the multi-gas-source supply mechanism 1 is mainly characterized in that all gas supply pipelines coming out of the low-temperature storage tank are communicated and connected in parallel, and the gas distribution valve group 15 not only needs to meet the opening and closing functions of the single-path pure gas, but also needs to meet the requirements of multiple paths of gas coming and filling in sequence. And when the single pure gas of multichannel filling, can switch to effectively discharge other gas through the busbar, avoid mutual pollution.

If current air supply includes multiple such as nitrogen gas, argon gas, carbon dioxide, when filling, has a plurality of fill dress stations, both can fill scattered bottle, also can fill dress check (steel bottle is tied a bundle), before mixed filling, preferentially carry out single pure gas and fill dress, carry out the first time at every kind of pure gas and fill dress and accomplish the back to reserve air supply 10 in the reserve air supply 10 that will correspond fills the completion in proper order, as the reserve air supply 10 of this kind of gas. The invention is superior to other automatic filling devices, the different feed gas inlet pipelines of the main bus bar 17 are respectively provided with the mutually independent emptying valves 8, when the pure gas is changed from mixing or the pure gas is changed into other types of pure gas for filling, other residual gases in the pipelines can be effectively discharged through the emptying branch pipes 20, and the problem of purity reduction caused by the fact that the other residual gases in the inlet pipelines are used as pollution sources can be effectively avoided. And also be provided with mutually independent unloading, vacuum valve on every confluence branch road respectively, every group can carry out unloading, vacuum and fill dress alone, and the advantage lies in that first group can carry out the second group automatically and fill dress after filling the completion, improves production efficiency. The automatic filling device can effectively ensure the filling pressure, and the automatic filling device provided by the invention can support the filling pressure of 42 MPa.

And moreover, the control computer is added, various products can be predefined and sent to the PLC in a mode of downloading product formulas, and a user directly selects the products through a human-computer interface without setting the processes and operations of pressure gas proportion, emptying and vacuum every time.

The filling process can automatically monitor pressure and temperature changes, and the system can be automatically switched to a safe state when the pressure and temperature changes within a certain time window and the change threshold value is not reached. The system automatically monitors the filling temperature, adjusts the temperature of the air source and controls the air supply speed through the frequency converter, so that the filling temperature does not exceed the temperature specified by the national standard, and if the filling temperature exceeds the temperature specified by the national standard, the filling is stopped immediately. The balance time is set in the filling, emptying and vacuum processes in consideration of the flow capacity of pipelines and valves, and the pressure after balance is used as the standard for whether each process flow is finished or not.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.