Pressure-equalizing gas mixing and distributing system

Abstract

The utility model belongs to a pressure-equalizing gas mixing and distributing system. Comprising a gas distribution and inlet main pipeline, a gas distribution and filling main pipeline and a gas distribution tail gas treatment pipeline, the gas distribution and inlet main pipeline is connected with the gas distribution tail gas treatment pipeline through the gas distribution and filling main pipeline, and the gas distribution and inlet main pipeline is communicated with a gas replacement pipeline and a plurality of gas inlet pipelines; the gas distributing and filling main pipeline is communicated with a pressure-equalizing gas distributing and filling unit; a tail gas treatment unit is arranged on the gas distribution tail gas treatment pipeline; a first valve is arranged on the gas replacement pipeline, and second valves are correspondingly arranged on the gas inlet pipelines respectively; the pressure-equalizing gas distributing and filling unit comprises a plurality of gas cylinder filling stations, and the length of the connecting position between the pressure-equalizing gas distributing and filling unit and the gas distributing and filling main pipeline is the same as the length of the pipeline between the gas cylinder filling stations. The device has the characteristics that the structure is simple, the design is reasonable, a plurality of gas cylinders can be filled at the same time, the filling efficiency is improved, and the quality of mixed gas can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of mixed gas, and in particular relates to a pressure-equalizing mixed gas system. Background Art

[0002] Mixed gas refers to a gas that is prepared by mixing two or more gases. It is often used in industrial production, modern medical care and fresh-keeping industries. The mixed gas can be a binary mixed gas, a ternary mixed gas, a quaternary mixed gas, etc. In the process of preparing the mixed gas, it is generally in the form of single-bottle filling to ensure the quality of the gas distribution. However, this working method has the defect of low filling efficiency. In order to improve the filling efficiency, several filling stations are generally set on the gas distribution main pipeline. However, due to the uneven pressure on the gas distribution main pipeline, it is easy to cause deviations in gas distribution between gas cylinders (that is, the area with high pressure is filled faster, and the area with low pressure is filled slower), thereby affecting the gas distribution efficiency and quality. Utility Model Content

[0003] The utility model provides a pressure-equalizing gas mixing system, which is used to solve the technical problems raised in the above-mentioned background technology.

[0004] The technical solution of the utility model is:

[0005] A pressure-equalizing gas mixing system comprises a gas distribution air intake main pipeline, a gas distribution and filling gas main pipeline and a gas distribution and exhaust gas treatment pipeline, wherein the gas distribution and filling gas main pipeline is connected to the gas distribution and exhaust gas treatment pipeline via the gas distribution and filling gas main pipeline, the gas distribution and filling gas main pipeline is connected with a replacement gas pipeline and a plurality of air intake pipelines, the gas distribution and filling gas main pipeline is connected with a pressure-equalizing gas distribution and filling unit; the gas distribution and exhaust gas treatment pipeline is provided with an exhaust gas treatment unit; the replacement gas pipeline is provided with a first valve, and a plurality of air intake pipelines are respectively provided with second valves; the pressure-equalizing gas distribution and filling unit comprises a plurality of gas cylinder filling stations, and the connection between the pressure-equalizing gas distribution and filling unit and the gas distribution and filling gas main pipeline is the same as the length of the pipelines between the plurality of gas cylinder filling stations.

[0006] The beneficial effects of the utility model are as follows: the utility model can replace the gas in the gas distribution gas intake main pipeline, the gas distribution gas filling main pipeline and the gas distribution gas exhaust treatment pipeline by arranging the air intake pipeline, the replacement gas pipeline and the matching exhaust gas treatment unit, so as to achieve the purpose of ensuring the quality of the mixed gas; further, by arranging the pressure equalizing gas distribution filling unit, the gas in the gas distribution gas filling main pipeline can be made to have the same pressure when entering several gas cylinder filling stations in a mechanical manner, so as to achieve the characteristic of improving the filling efficiency while ensuring the filling quality.

[0007] Preferably, the head end of the replacement gas pipeline is connected to the replacement gas pipeline network; the head ends of a plurality of air intake pipelines are respectively connected to corresponding different gas pipeline networks.

[0008] Preferably, the pressure-equalizing gas distribution and filling unit includes a filling main pipeline, the head end of the filling main pipeline is connected to the gas distribution and filling main pipeline, the end of the filling main pipeline is connected to the head ends of several filling branch pipelines, the ends of the filling branch pipelines are respectively connected to the head ends of several filling branch pipelines, and the filling branch pipelines are connected to the gas cylinder filling station through the corresponding third valve; the pipeline distances between the several gas cylinder filling stations and the head ends of the filling main pipeline are the same.

[0009] Preferably, the diameters of the several filling sub-pipelines are the same, and the diameters of the several filling branch pipes are the same.

[0010] Preferably, the diameters of the main filling pipeline, the branch filling pipeline and the branch filling pipeline are the same.

[0011] Preferably, the tail gas treatment unit includes a venting part and a vacuuming part; the venting part includes a venting pipe with a venting valve; the vacuuming part includes a vacuuming pipe, and the vacuuming pipe is provided with a vacuuming valve and a vacuum pump.

[0012] Preferably, the vacuum pumping unit further comprises a vacuum gauge provided at the head end of the air distribution and air intake main pipeline and having a fourth valve.

[0013] Preferably, a pressure transmitter is provided on the main pipeline for distributing and filling gas.

[0014] A pressure-equalizing gas mixing system made according to the above technical scheme, by setting a pressure-equalizing gas distribution and filling unit, can mechanically make the pressure of the gas in the gas distribution and filling gas main pipeline consistent when it enters several gas cylinder filling stations, so as to achieve the characteristic of improving the filling efficiency while ensuring the filling quality; by setting an air intake pipeline, a replacement gas pipeline and a matching exhaust gas treatment unit, it can realize the replacement of the gas in the gas distribution intake main pipeline, the gas distribution and filling gas main pipeline and the gas distribution exhaust gas treatment pipeline; further, by setting a venting part and a vacuum pumping part, the replaced gas and the filling residual gas in the intermediate process can be emptied to ensure the quality of the mixed gas and improve the filling efficiency; it has the characteristics of simple structure, reasonable design, and the ability to fill multiple gas cylinders at the same time, which not only improves the filling efficiency but also ensures the quality of the mixed gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Numbers in the figure: 1. Gas distribution intake main pipeline; 2. Gas distribution filling gas main pipeline; 3. Gas distribution exhaust gas treatment pipeline; 4. Replacement gas pipeline; 5. Intake pipeline; 6. Replacement gas pipeline network; 7. Gas pipeline network; 8. Charging main pipeline; 9. Charging branch pipeline; 10. Charging branch pipeline; 11. Gas cylinder filling station; 12. Vent valve; 13. Vent pipeline; 14. Vacuum pipeline; 15. Vacuum valve; 16. Vacuum pump; 17. Vacuum gauge; 18. Pressure transmitter; 19. First valve; 20. Second valve; 21. Third valve; 22. Fourth valve. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0019] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0020] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1 As shown, the utility model is a pressure-equalizing mixing and distributing gas system, which includes a distribution gas intake main pipeline 1, a distribution gas filling main pipeline 2 and a distribution gas exhaust gas treatment pipeline 3, the distribution gas intake main pipeline 1 is connected to the distribution gas exhaust gas treatment pipeline 3 through the distribution gas filling main pipeline 2, the distribution gas intake main pipeline 1 is connected with a replacement gas pipeline 4 and a plurality of intake pipelines 5, the distribution gas filling main pipeline 2 is connected with a pressure-equalizing distribution gas filling unit; the distribution gas exhaust gas treatment pipeline 3 is provided with an exhaust gas treatment unit; the replacement gas pipeline 4 is provided with a first valve 19, and a plurality of intake pipelines 5 are respectively provided with second valves 20; the pressure-equalizing distribution gas filling unit includes a plurality of gas cylinder filling stations 11, and the connection between the pressure-equalizing distribution gas filling unit and the distribution gas filling main pipeline 2 is the same as the length of the pipeline between the plurality of gas cylinder filling stations 11. As is known to all, in order to ensure the quality of gas distribution in the pressure-equalizing gas mixing system, a small diameter pipe is generally used. The pipe can achieve the characteristics of precise gas distribution and reduce gas loss, but at the same time there is a hysteresis defect (that is, the gas pressure is uneven after passing through the filling main pipe 8, the pressure is uneven when multiple bottles are filled, and when the air pressure fluctuates, the adjustment timing of the automatic control valve is often delayed), resulting in the defect that the traditional automatic control form cannot achieve precise gas distribution; the utility model sets a pressure-equalizing gas distribution filling unit, so that the connection between the pressure-equalizing gas distribution filling unit and the gas distribution filling gas main pipe 2 is the same as the pipe length between several gas cylinder filling stations 11, so as to achieve the same pressure at several gas cylinder filling stations 11 during the filling process; at the same time, in order to improve the efficiency of filling and mixing gas and the quality of mixed gas, the utility model also specially sets an exhaust gas treatment unit, which can quickly replace the gas in the gas distribution air intake main pipe 1, the gas distribution filling gas main pipe 2 and the gas distribution exhaust gas treatment pipe 3 by means of vacuuming and venting. The utility model can realize the simultaneous filling of multiple gas cylinders on the basis of ensuring the quality of the mixed gas so as to improve the filling efficiency.

[0023] Furthermore, the head end of the replacement gas pipeline 4 is connected to the replacement gas network 6; the head ends of the plurality of air intake pipelines 5 are respectively connected to corresponding different gas networks 7. The replacement gas network 6 described in the utility model may contain balance gas such as nitrogen and neon, and different gas networks 7 may be determined according to actual production conditions.

[0024] Furthermore, the pressure-equalizing gas distribution and filling unit includes a filling main pipeline 8, the head end of the filling main pipeline 8 is connected to the gas distribution and filling gas main pipeline 2, the end of the filling main pipeline 8 is connected to the head ends of several filling branch pipelines 9, the ends of the filling branch pipelines 9 are respectively connected to the head ends of several filling branch pipelines 10, and the filling branch pipelines 10 are connected to the gas cylinder filling station 11 through the corresponding third valve 21; the pipeline distances between the several gas cylinder filling stations 11 and the head ends of the filling main pipeline 8 are the same. The filling main pipeline 8 described in the utility model is connected to the filling branch pipeline 10 through the filling branch pipeline 9, so that multiple gas cylinder filling stations 11 can be set in the same pressure-equalizing gas distribution and filling unit to achieve the purpose of simultaneously filling the gas cylinders; it should be noted that the end of the filling main pipeline 8 is connected to at least two filling branch pipelines 9 (which can be three, four, five, six, etc.), and the end of a filling branch pipeline 9 is connected to at least two filling branch pipelines 10 (which can be three, four, five, six, etc.), and there is a one-to-one correspondence between the filling branch pipelines 10 and the gas cylinder filling stations 11 (and the third valve 21).

[0025] Furthermore, the diameters of the plurality of filling branch pipes 9 are the same, and the diameters of the plurality of filling branch pipes 10 are the same. In combination with the same pipe distances between the plurality of gas cylinder filling stations 11 and the head end of the filling main pipe 8, the same pressure at the plurality of gas cylinder filling stations 11 during the filling process can be further achieved by having the same pipe diameters.

[0026] Furthermore, the filling main pipeline 8, the filling branch pipeline 9 and the filling branch pipeline 10 have the same diameter.

[0027] Furthermore, the tail gas treatment unit includes a venting part and a vacuuming part; the venting part includes a venting pipe 13 with a venting valve 12; the vacuuming part includes a vacuuming pipe 14, and the vacuuming pipe 14 is provided with a vacuuming valve 15 and a vacuum pump 16. The utility model can vent the replacement gas and the filling gas in the intermediate process through the above arrangement, and then perform vacuuming after venting, so as to achieve the purpose of quickly replacing the gas, thereby achieving the purpose of ensuring the quality of the mixed gas and improving the efficiency of filling the mixed gas.

[0028] Furthermore, the vacuum pumping unit also includes a vacuum gauge 17 provided at the head end of the gas distribution and intake main pipeline 1 and provided with a fourth valve 22. As can be seen from the foregoing, in order to ensure the quality of gas distribution in the pressure-equalizing mixing and gas distribution system, a pipe with a small diameter is generally used. The lower the vacuum degree, the greater the difficulty of vacuum pumping. There is a certain deviation between the vacuum degree at the vacuum pump 16 and the vacuum degree at the gas distribution and intake main pipeline 1. The above-mentioned setting can truly reflect the vacuum degree in the gas distribution and intake main pipeline 1, the gas distribution and charging gas main pipeline 2 and the gas distribution and exhaust gas treatment pipeline 3, thereby ensuring the gas distribution quality.

[0029] Furthermore, a pressure transmitter 18 is provided on the gas distribution and charging gas main pipeline 2 .

[0030] The working principle of the utility model is as follows: when the utility model is needed, (1) the gas cylinder is placed at the gas cylinder filling station 11, and the cylinder valve on the gas cylinder is connected to the filling branch pipe 10; (2) the first valve 19 and the venting valve 12 are opened, so that the replacement gas passes through the gas distribution inlet main pipe 1, the gas distribution filling gas main pipe 2 and the gas distribution exhaust gas treatment pipe 3 in sequence, and is vented through the venting pipe 13; (3) after venting for a period of time, the first valve 19 and the venting valve 12 are closed, the vacuum valve 15 is opened, and the vacuum pump 16 is turned on. , perform vacuuming operation; when the vacuum degree displayed by the vacuum gauge 17 reaches the preset threshold, close the vacuuming valve 15 and the vacuum pump 16; (4) fill the first gas, open the second valve 20 corresponding to the first gas, and the gas in the gas network 7 enters the corresponding gas cylinder through the corresponding gas inlet pipeline 5, the gas distribution gas inlet main pipeline 1, the gas distribution and filling gas main pipeline 2 and the pressure distribution and filling unit; the gas pressure in the pressure distribution and filling unit remains consistent during the above filling process; when the gas cylinder reaches the corresponding weight, close the corresponding second valve 20 to and the corresponding third valve 21; (5) opening the venting valve 12 to vent the residual filling gas in the pipeline; (6) after venting for a period of time, closing the venting valve 12, opening the vacuum valve 15, and the vacuum pump 16 to perform a vacuum operation; when the vacuum degree displayed by the vacuum gauge 17 reaches a preset threshold, closing the vacuum valve 15 and the vacuum pump 16; (7) opening the first valve 19 and the venting valve 12, so that the replacement gas passes through the gas distribution intake main pipeline 1, the gas distribution filling gas main pipeline 2 and the gas distribution exhaust gas treatment pipeline 3 in sequence, and is discharged by the venting pipe (8) After a period of time, close the first valve 19 and the venting valve 12, open the vacuum valve 15, and the vacuum pump 16 to perform the vacuum operation; when the vacuum degree displayed by the vacuum gauge 17 reaches the preset threshold, close the vacuum valve 15 and the vacuum pump 16; (9) Fill the second gas and repeat the above steps (4) to 8; (10) When all gases are filled, close the bottle valve, open the corresponding third valve 21, and repeat the above steps (5), (6) and (7). The utility model has the characteristics of simple structure, reasonable design, and the ability to simultaneously fill multiple gas cylinders, which not only improves the filling efficiency but also ensures the quality of the mixed gas.

[0031] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in this field. The utility model is mainly used to protect mechanical devices, so the utility model no longer explains the control method and circuit connection in detail. The peripheral controller mentioned in the specification can control the electrical components mentioned in this article, and the peripheral controller is a conventional known device.

[0032] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0033] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above are only preferred implementation methods of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A pressure-equalizing gas mixing system, characterized in that: The system comprises a gas distribution air intake main pipeline (1), a gas distribution charging gas main pipeline (2) and a gas distribution exhaust gas treatment pipeline (3). The air distribution air intake main pipeline (1) is connected to the air distribution exhaust gas treatment pipeline (3) through the air distribution charging gas main pipeline (2). The main air distribution and intake pipeline (1) is connected to a replacement air pipeline (4) and a plurality of intake pipelines (5). The main gas distribution and filling pipeline (2) is connected to a pressure equalizing gas distribution and filling unit; The exhaust gas treatment pipeline (3) is provided with an exhaust gas treatment unit; The replacement gas pipeline (4) is provided with a first valve (19), and a plurality of air intake pipelines (5) are respectively provided with second valves (20); The pressure-equalizing gas distribution and filling unit comprises a plurality of gas cylinder filling stations (11), and the connection between the pressure-equalizing gas distribution and filling unit and the gas distribution and filling gas main pipeline (2) is the same as the length of the pipelines between the plurality of gas cylinder filling stations (11).

2. The pressure-equalizing gas mixing system according to claim 1, characterized in that: The head end of the replacement gas pipeline (4) is connected to the replacement gas pipeline network (6); The head ends of the plurality of air inlet pipes (5) are respectively connected to corresponding different gas pipeline networks (7).

3. The pressure-equalizing gas mixing system according to claim 1, characterized in that: The pressure-equalizing gas distribution and filling unit comprises a filling main pipeline (8), the head end of the filling main pipeline (8) is connected to the gas distribution and filling main pipeline (2), the end of the filling main pipeline (8) is connected to the head ends of a plurality of filling branch pipelines (9), the ends of the filling branch pipelines (9) are respectively connected to the head ends of a plurality of filling branch pipelines (10), and the filling branch pipelines (10) are connected to the gas cylinder filling station (11) through corresponding third valves (21); The pipeline distances between a plurality of gas cylinder filling stations (11) and the head end of the filling main pipeline (8) are the same.

4. A pressure-equalizing gas mixing system according to claim 3, characterized in that: The diameters of the plurality of filling sub-pipelines (9) are the same, and the diameters of the plurality of filling branch pipes (10) are the same.

5. A pressure-equalizing gas mixing system according to claim 4, characterized in that: The pipe diameters of the main filling pipe (8), the branch filling pipe (9) and the branch filling pipe (10) are the same.

6. The pressure-equalizing gas mixing system according to claim 1, characterized in that: The tail gas treatment unit includes a venting part and a vacuuming part; The venting part comprises a venting pipeline (13) with a venting valve (12); The vacuum pumping part comprises a vacuum pumping pipeline (14), and a vacuum pumping valve (15) and a vacuum pump (16) are provided on the vacuum pumping pipeline (14).

7. The pressure-equalizing gas mixing system according to claim 6, characterized in that: The vacuum pumping unit also includes a vacuum gauge (17) provided at the head end of the gas distribution and intake main pipeline (1) and having a fourth valve (22).

8. The pressure-equalizing gas mixing system according to claim 1, characterized in that: The main gas distribution and charging gas pipeline (2) is provided with a pressure transmitter (18).

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