Mixed gas distribution device

Abstract

The utility model discloses a mixed gas distribution device which comprises a main gas guide pipe, a plurality of branch gas guide pipes, a mixing tank, a gas storage tank and a vacuum pump, the branch gas guide pipes are communicated with one end of the mixing tank, the other end of the mixing tank is communicated with the gas storage tank through the main gas guide pipe, and the vacuum pump is communicated with the gas storage tank. The mixing tank comprises a tank body and a plurality of flow guide sets sequentially arranged in the tank body in the radial direction of the tank body, a plurality of air inlets are formed in the upper end of the side wall of the tank body, an air outlet is formed in the lower end of the side wall of the tank body, each flow guide set comprises a plurality of arc-shaped flow guide pieces installed in the tank body at intervals in the circumferential direction of the tank body, and the arc-shaped flow guide pieces are coaxially arranged. The arc-shaped flow deflectors of every two adjacent flow guiding sets are distributed in a staggered mode, the air inlets are opposite to the arc-shaped flow deflectors, and the air outlets are distributed among the arc-shaped flow deflectors at the lowest end. And the branch gas guide pipes convey the gas to the gas storage tank after being mixed by the mixing tank, so that different types of gas are prevented from being layered in the gas storage tank.

Description

Technical Field

[0001] The present application relates to the technical field of gas and gas or steam mixing, and in particular to a mixed gas distribution device. Background Art

[0002] When filling a gas storage tank with mixed gas, the gas is usually filled into a cylinder and then transported by a gas manifold.

[0003] The utility model patent with announcement number CN206386698U discloses a multi-component flammable and explosive mixed gas preparation and tank filling device, including a buffer tank, a mixed gas tank filling circuit, a mixed gas storage cylinder and at least two parallel mixed gas preparation circuits, the outlet ends of all mixed gas preparation circuits are connected to the air inlet of the buffer tank, and each mixed gas preparation circuit is sequentially provided with a pressure reducing and stabilizing valve and a mass flow controller; the air inlet end of the mixed gas tank filling circuit is connected to the air outlet of the buffer tank, and the air outlet end of the mixed gas tank filling circuit is connected to the air inlet of the mixed gas storage cylinder, and the first electromagnetic regulating valve, the first two-position three-way valve and the second electromagnetic regulating valve are sequentially provided on the mixed gas tank filling circuit from the air inlet end to the air outlet end.

[0004] Various standard gases of the gas source flow from the standard gas cylinders of each mixed gas preparation gas circuit through the pressure reducing and stabilizing valve, the mass flow controller, into the buffer tank, and then flow through the first solenoid regulating valve, the first port and the second port of the first two-position three-way valve, the first solenoid regulating valve, and enter the mixed gas storage cylinder.

[0005] When the densities of different types of standard gases are different, stratification will occur in the standard gas in the buffer tank. The gases of different components in the buffer tank enter the mixed gas storage cylinder in different orders, causing the gas with low density to flow into the mixed gas storage cylinder first, and the standard gas with high density to flow into the mixed gas storage cylinder later. The high-density standard gas remaining in the buffer tank and the delivery pipeline causes the proportion of the high-density standard gas in the mixed gas storage cylinder to decrease, reducing the accuracy of the mixed gas distribution. Summary of the invention

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a mixed gas distribution device, and the technical solution adopted includes:

[0007] A mixed gas distribution device, comprising a main air pipe, a branch air pipe, a mixing tank, an air storage tank and a vacuum pump, wherein the branch air pipes are provided in plurality, the plurality of branch air pipes are respectively connected to one end of the mixing tank, the other end of the mixing tank is connected to the air storage tank through the main air pipe, the vacuum pump is connected to the air storage tank, the branch air pipes are used to respectively send gases into the mixing tank and send the gases to the air storage tank through the main air pipe after mixing;

[0008] The mixing tank comprises a tank body and a plurality of guide groups sequentially arranged in the tank body along the radial direction thereof. The upper end of the side wall of the tank body is provided with a plurality of air inlets, and the lower end of the tank body is provided with an air outlet.

[0009] Each of the guide groups comprises a plurality of arc guide vanes spaced apart along the circumference of the tank body, each of the arc guide vanes is coaxially arranged in the tank body and its lower end is connected to the inner wall of the tank body, the radius of the arc guide vanes of the guide group decreases from the outside to the inside, the arc guide vanes of two adjacent guide groups are staggered up and down, and the upper ends of all the arc guide vanes are flush with the upper end of the tank body,

[0010] The plurality of air inlets are respectively opposite to the arc-shaped guide vanes, and the air outlets are distributed between the plurality of arc-shaped guide vanes at the lowest ends.

[0011] A technical solution adopted by an embodiment of the utility model to solve its technical problem is: a plurality of air inlets correspond one-to-one to the arc-shaped guide vanes of the guide group at the uppermost end and are distributed relatively to the corresponding arc-shaped guide vanes.

[0012] An embodiment of the utility model adopts a technical solution to solve its technical problem: in two adjacent guide groups, the gap between two adjacent arc-shaped guide vanes of the guide group located on the inner side is distributed in the arc opening of the arc-shaped guide vane of the guide group located on the outer side.

[0013] The technical solution adopted by an embodiment of the utility model to solve the technical problem is: the tank body is conical.

[0014] The technical solution adopted by an embodiment of the utility model to solve the technical problem is: each of the branch air guide pipes is sequentially provided with a flow sensor and a solenoid valve along its conveying direction.

[0015] Beneficial effects of the utility model:

[0016] Several branch gas pipes transport gas to the mixing tank respectively, and then transport the gas to the gas storage tank after mixing in the mixing tank, so that the gas can be evenly mixed and then flow into the gas storage tank evenly, avoiding the uneven mixing of the gas in the mixing tank affecting the gas component content in the gas storage tank, thereby ensuring the accuracy of gas distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of the mixer gas distribution device described in this application;

[0019] Figure 2 This is a schematic diagram of the structure of the gas mixing tank described in this application;

[0020] Figure 3 A side cross-sectional view of the gas mixing tank described in this application;

[0021] Figure 4 This is a top sectional view of the gas mixing tank described in this application. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0026] Reference Figure 1-4, an embodiment of the present application is proposed, in which the mixed gas distribution device described in this embodiment includes a main air pipe 10, a branch air pipe 20, a mixing tank 30, an air storage tank 40 and a vacuum pump 50, and the branch air pipe 20 is provided with a plurality of branch air pipes, and the plurality of branch air pipes 20 are respectively connected to one end of the mixing tank 30, and the other end of the mixing tank 30 is connected to the air storage tank 40 through the main air pipe 10, and the vacuum pump 50 is connected to the air storage tank 40, and the branch air pipes 20 are used to respectively send gases into the mixing tank 30 and send the gases to the air storage tank 40 through the main air pipe 10 after mixing.

[0027] Before filling the gas storage tank 40 with gas, the vacuum pump 50 is started, and the vacuum pump 50 evacuates the gas storage tank 40 , thereby exhausting the air in the gas storage tank 40 to prevent the gas in the gas storage tank 40 from causing mixed gas pollution.

[0028] According to the attached Figure 1 As shown in the schematic diagram of the mixing and gas distribution device, after the gas storage tank 40 starts to be filled with gas, several branch gas pipes 20 respectively transport gas to the mixing tank 30, and the gas is mixed in the mixing tank 30 and then transported to the gas storage tank 40, until the gas filling amount in the gas storage tank 40 reaches a preset loading amount, the branch gas pipes 20 stop supplying gas to the mixing tank 30, so that the gas is mixed evenly and stored in the gas storage tank 40, avoiding the stratification of different types of gases in the gas storage tank 40, and making the gas mix evenly and then flow into the gas storage tank, avoiding the influence of the gas component content in the gas storage tank due to uneven gas mixing.

[0029] Based on the above content, specifically, the mixing tank 30 includes a tank body 31 and a plurality of guide groups 32 sequentially arranged in the tank body 31 along its radial direction, a plurality of air inlets 311 are arranged on the upper end of the side wall of the tank body 31, and an air outlet 312 is arranged at the lower end of the tank body 31;

[0030] Each of the guide groups 32 includes a plurality of arc guide vanes spaced apart along the circumference of the tank body 31, each of the arc guide vanes is coaxially arranged in the tank body 31 and its lower end is connected to the inner wall of the tank body 31, the radius of the arc guide vanes of the guide group 32 decreases from the outside to the inside, and the arc guide vanes of two adjacent guide groups 32 are staggered up and down, that is, in two adjacent guide groups 32, each arc guide vane of the guide group 32 located on the outside is distributed between two adjacent arc guide vanes of the guide group 32 located on the inside, and the upper ends of all the arc guide vanes are flush with the upper end of the tank body 31.

[0031] The plurality of air inlets 311 are respectively opposite to the arc-shaped guide vanes, and the air outlets 312 are distributed between the plurality of arc-shaped guide vanes at the lowest ends.

[0032] The air inlet 311 can be distributed relative to the arc-shaped guide vane of the uppermost guide group 32, and the air inlet 311 can also be distributed relative to the arc-shaped guide vanes of other guide groups 32. In order to ensure the mixing effect of all gases after entering the mixing tank 30, the present embodiment preferably designs multiple air inlets 311 to correspond one-to-one to the arc-shaped guide vanes of the uppermost guide group 32 and to be distributed relative to the corresponding arc-shaped guide vanes.

[0033] Preferably, in two adjacent guide groups 32, the gap between two adjacent arc-shaped guide plates of the inner guide group 32 is distributed in the arc mouth of the arc-shaped guide plate of the outer guide group 32, and the mixing tank 30 allows the gas flowing into the mixing tank 30 to be broken up by the arc-shaped guide plates and then mixed in pairs, and then the mixed gas is further broken up by the inner arc-shaped guide plates and then mixed in pairs, so that the different gases flowing into the mixing tank 30 can be effectively and fully mixed and then delivered to the gas storage tank 40.

[0034] See attached Figure 2 The figure shows the flow direction of different types of gases in the mixing tank 30. Taking the one-to-one correspondence between the air inlet 311 and the arc-shaped guide vanes of the uppermost guide group 32 as an example, the guide groups 32 are named the first guide group, the second guide group 32 from top to bottom, and so on. When the gas flows into the mixing tank 30, it will be dispersed to both sides under the action of the arc-shaped guide vanes of the first guide group, and flow from the gap between two adjacent arc-shaped guide vanes toward the arc-shaped guide vanes of the second guide group, and flow from the gap between two adjacent arc-shaped guide vanes toward the arc-shaped guide vanes of the third guide group, and so on.

[0035] Based on the above content, the present application designs the tank body 31 as a conical cylinder, the lower end of the arc guide plate is connected to the inner wall of the conical cylinder, and the arc guide plates of the multiple guide groups 32 are distributed in sequence along the radial direction of the conical cylinder to facilitate the assembly of the mixing tank 30.

[0036] Specifically, the branch air pipe 20 is provided with a flow sensor 60 and a solenoid valve 70 in sequence along its conveying direction. An air pump is provided at one end of the branch air pipe 20 away from the mixing tank 30. The air pump conveys the required filling gas to the mixing tank 30 through the branch air pipe 20. The flow sensor 60 and the solenoid valve 70 are arranged on the branch air pipe 20. The flow sensor 60 and the solenoid valve 70 are respectively connected to the control box. The flow sensor 60 is used to detect the gas flow flowing through the branch air pipe 20. After the flow sensor 60 detects that the gas conveying amount in the branch air pipe 20 reaches the preset loading amount, the solenoid valve 70 is closed to complete the filling of the gas.

[0037] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A mixed gas distribution device, characterized in that: The invention comprises a main air pipe (10), a branch air pipe (20), a mixing tank (30), an air storage tank (40) and a vacuum pump (50); a plurality of branch air pipes (20) are provided, and the plurality of branch air pipes (20) are respectively connected to one end of the mixing tank (30); the other end of the mixing tank (30) is connected to the air storage tank (40) through the main air pipe (10); the vacuum pump (50) is connected to the air storage tank (40); the branch air pipes (20) are used to respectively send gases into the mixing tank (30), and after mixing, the gases are sent to the air storage tank (40) through the main air pipe (10); The mixing tank (30) comprises a tank body (31) and a plurality of guide groups (32) arranged in sequence in the tank body (31) along the radial direction thereof; a plurality of air inlets (311) are arranged on the upper end of the side wall of the tank body (31); and an air outlet (312) is arranged at the lower end of the tank body (31). Each of the guide groups (32) comprises a plurality of arc-shaped guide vanes spaced apart along the circumference of the tank body (31); each of the arc-shaped guide vanes is coaxially arranged in the tank body (31) and its lower end is connected to the inner wall of the tank body (31); the radius of the arc-shaped guide vanes of the guide group (32) decreases from the outside to the inside; the arc-shaped guide vanes of two adjacent guide groups (32) are staggered in upper and lower directions; and the upper ends of all the arc-shaped guide vanes are flush with the upper end of the tank body (31). The plurality of air inlets (311) are respectively opposite to the arc-shaped guide vanes, and the air outlets (312) are distributed between the plurality of arc-shaped guide vanes at the bottom.

2. The mixed gas distribution device according to claim 1, characterized in that: The plurality of air inlets (311) correspond one-to-one to the arc-shaped guide vanes of the uppermost guide group (32) and are distributed relative to the corresponding arc-shaped guide vanes.

3. The mixed gas distribution device according to claim 1, characterized in that: In two adjacent flow guide groups (32), the gap between two adjacent arc-shaped flow guide plates of the flow guide group (32) located on the inner side is distributed in the arc opening of the arc-shaped flow guide plate of the flow guide group (32) located on the outer side.

4. The mixed gas distribution device according to claim 1, characterized in that: The tank body (31) is conical.

5. The mixed gas distribution device according to claim 1, characterized in that: Each of the branch air ducts (20) is provided with a flow sensor (60) and a solenoid valve (70) in sequence along its conveying direction.

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