Gas mixing system with carbon dioxide water removal device

Abstract

The utility model discloses a gas mixing system with a carbon dioxide dewatering device, which belongs to the technical field of mixed gas supply, and comprises an argon conveying pipeline and a carbon dioxide conveying pipeline, a balance valve is arranged between the midways of the paths of the two conveying pipelines, and the end points of the paths of the two conveying pipelines are communicated through a proportioning valve. A cold trap and a thermostat are sequentially arranged on the portion, between the balance valve and the proportioning valve, of the carbon dioxide conveying pipeline in the gas flowing direction. The gas mixing system can effectively remove moisture in the carbon dioxide gas through the condensation effect of the cold trap, so that the content of water vapor in the mixed gas is reduced. Meanwhile, the thermostat is used for heating the dewatered carbon dioxide to recover the carbon dioxide to normal temperature pressure, so that the pressure change caused by temperature fluctuation is avoided, the accuracy of the mixing ratio of the carbon dioxide and the argon is ensured, and the reliability and the applicability of the gas mixing system are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mixed gas supply technical field, specifically a kind of mixed gas system with carbon dioxide water removal device. BACKGROUND

[0002] In modern industrial field, carbon dioxide and argon mixed gas is widely used in welding, laser processing and other processes requiring high-precision protective gas. The ratio and quality of mixed gas directly affect the process effect, so the design of related equipment needs to fully guarantee the accuracy of gas ratio and output quality.

[0003] Mixed gas distribution cabinet is composed of mixed gas reservoir and control valve components, with adjustable flow and high precision, by mixing carbon dioxide and argon in a certain proportion inside, to output mixed gas at a certain pressure value. But mixed gas distribution cabinet also has some problems in use, such as high water vapor content in output mixed gas and water vapor condensation at gas distribution cabinet outlet, which will affect the welding protection effect and cause quality problems for some water content sensitive processes (such as precision laser welding).

[0004] Carbon dioxide gas is easy to adsorb moisture during preparation and storage, and its water content is often higher than that of argon. High water content of carbon dioxide may cause water vapor condensation with temperature and pressure changes. High-density filter can remove water in gas to some extent, but gas flow will be affected by filter resistance, resulting in unstable flow and speed of gas output, and significantly reduced flow. Condenser can condense and remove water vapor by reducing gas temperature, with low impact on gas flow, but condenser cooling will change the pressure of carbon dioxide, affecting its accurate ratio with argon. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a kind of mixed gas system with carbon dioxide water removal device to solve the problems in the prior art.

[0006] A kind of mixed gas system with carbon dioxide water removal device is provided, comprising:

[0007] Argon conveying pipeline and carbon dioxide conveying pipeline, balance valve is arranged between the path midway of argon conveying pipeline and the path midway of carbon dioxide conveying pipeline, and the path terminal of argon conveying pipeline and the path terminal of carbon dioxide conveying pipeline are communicated by ratio valve;

[0008] Cold trap and thermostat are sequentially arranged on carbon dioxide conveying pipeline between balance valve and ratio valve along gas flow direction.

[0009] Further, the thermostat comprises a heating assembly and a coil assembly, two ends of the coil assembly are communicated with the carbon dioxide conveying pipeline, and the heating assembly is used for controlling the temperature of the coil assembly. Through cooperation of the coil assembly and the heating assembly, the gas can be subjected to temperature rising and temperature stabilization treatment, the quality of mixed gas output is ensured, and the accuracy of gas proportioning affected by pressure fluctuation is avoided.

[0010] Further, the output end of the coil assembly is provided with a temperature detector. Through the arrangement of the temperature detector, real-time monitoring and accurate control of the gas temperature can be realized, and the pressure stability of the gas output is further improved.

[0011] Further, the thermostat further comprises a thermostat box, the coil assembly is immersed in a water bath in the thermostat box, and the heating assembly is used for controlling the temperature of the water bath in the thermostat box. The thermostat is provided with the thermostat box, the coil assembly is immersed in the water bath in the thermostat box, the temperature of the water bath is controlled and kept constant by the heating assembly, so that the temperature of the gas in the coil is more uniform.

[0012] Further, a control pressure gauge is arranged between the thermostat and the proportioning valve. The pressure gauge can reflect the change of the gas pressure in real time, the pressure of the carbon dioxide gas entering the proportioning valve is stable, the accuracy of the gas proportioning is improved, and the influence of the pressure fluctuation on the mixed gas proportion is avoided.

[0013] Further, the carbon dioxide conveying pipeline comprises a ball valve, a pressure controller, an input pressure gauge and a one-way valve arranged in sequence along the gas flow direction, and the balance valve is located between the input pressure gauge and the one-way valve. Through reasonable configuration of these pipeline components, the gas flow and the pressure in the carbon dioxide conveying path can be accurately controlled, the gas unidirectional flow is ensured, the backflow of the gas cooled by the cold trap interferes with the pressure control of the whole system is prevented, and the stability of the system is further improved.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The mixed gas system is provided with a cold trap in the carbon dioxide conveying pipeline, water in the carbon dioxide gas can be effectively removed through condensation, so that the content of water vapor in the mixed gas is reduced. Meanwhile, the cold trap is used for preliminarily cooling and removing water in the carbon dioxide, the thermostat is used for heating the carbon dioxide after water removal to restore the carbon dioxide to normal temperature and pressure, the pressure change caused by temperature fluctuation is avoided, the accuracy of the carbon dioxide and argon mixing proportion is ensured, and the reliability and applicability of the mixed gas system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 The overall structure schematic diagram of the gas mixing system with the carbon dioxide water removal device;

[0018] Figure 2 The structure schematic diagram of the thermostat provided by the embodiment of the present application.

[0019] In the figure: 1, argon conveying pipeline; 2, carbon dioxide conveying pipeline; 21, ball valve; 22, pressure controller; 23, input pressure gauge; 24, check valve; 3, balance valve; 4, proportioning valve; 5, cold trap; 6, thermostat; 61, heating assembly; 62, coil assembly; 63, temperature detector; 64, thermostat box; 7, control pressure gauge. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will describe and explain the present application by combining with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, the present application can also be applied to other similar situations without creative labor. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in the present application, some design, manufacture or production changes based on the technical content disclosed in the present application are only routine technical means, and should not be understood as insufficient disclosure of the present application.

[0022] However, there will be cases of omitting unnecessary detailed description. For example, there are cases of omitting detailed description of well-known matters, repeated description of actually identical structures. This is to avoid the following description from becoming unnecessarily long, facilitating the understanding of those skilled in the art. In addition, the drawings and the following description are provided for those skilled in the art to fully understand the present application, and are not intended to limit the subject matter recited in the claims.

[0023] Referring to Figure 1 As shown in the utility model embodiment, the balance valve 3 is arranged between the path of the argon conveying pipeline 1 and the path of the carbon dioxide conveying pipeline 2, and the path end of the argon conveying pipeline 1 and the path end of the carbon dioxide conveying pipeline 2 are communicated through the proportioning valve 4. The cold trap 5 and the thermostat 6 are arranged in sequence along the gas flow direction between the balance valve 3 and the proportioning valve 4 on the carbon dioxide conveying pipeline 2.

[0024] The two kinds of gases to be mixed enter the balance valve 3 through the argon conveying pipeline 1 and the carbon dioxide conveying pipeline 2 respectively. The balance valve 3 is used for coordinating the flow of the two kinds of gases by controlling the open size, improving the mixing ratio precision of the two kinds of gases, and then entering the respective pipelines respectively. The carbon dioxide gas enters the cold trap 5, which preliminarily cools the carbon dioxide, reduces the temperature of the carbon dioxide, and removes water vapor through condensation. The gas treated by the cold trap 5 further enters the thermostat 6, which warms the gas to normal temperature or isothermal state with argon, reduces the pressure fluctuation caused by temperature reduction, and improves the gas mixing and proportioning precision of the proportioning valve 4. The system can realize high-precision proportioning of the mixed gas through multi-stage processing. The combination of the cold trap 5 and the thermostat 6 can not only effectively remove the water vapor in the carbon dioxide, but also eliminate the pressure imbalance caused by the temperature difference of the gas, ensure the stability of the gas mixing ratio, and thus improve the quality and process effect of the output gas.

[0025] Referring to Figure 1 and Figure 2 As shown in the utility model embodiment, the thermostat 6 includes a heating component 61 and a coil component 62. The heating component 61 controls the temperature of the coil component 62 through a thermal resistor or an infrared heating device. The two ends of the coil component 62 are communicated with the carbon dioxide conveying pipeline 2. The coil component 62 increases the flow path of the carbon dioxide gas through the coil structure, so that the carbon dioxide gas has sufficient temperature adjustment time, and thus the carbon dioxide gas output by the thermostat 6 is kept in the ideal temperature range, the influence of the temperature difference on the pressure is eliminated, and the accuracy of the gas mixing ratio is ensured.

[0026] A temperature detector 63 is arranged at the output end of the coil component 62. The temperature detector 63 is used for monitoring the output temperature of the carbon dioxide gas in real time, and feeding back the data to the control system to adjust the power or temperature parameter of the heating component 61. Through the temperature detector 63, the gas temperature is monitored and controlled in real time, the stability of the gas temperature and the reliability of the gas mixing system are further improved, and the error caused by the temperature fluctuation is reduced.

[0027] The thermostat 6 further comprises a thermostat box 64 filled with heat-conducting medium. The coil assembly 62 is immersed in a water bath in the thermostat box 64, the temperature of the water bath is controlled and kept stable by the heating assembly 61, and the gas is heated more uniformly by the heat transfer mode of the water bath to the coil assembly 62, and the efficiency of temperature control of the gas in the coil assembly 62 is improved.

[0028] The control pressure gauge 7 is arranged between the thermostat 6 and the proportioning valve 4, which is used to monitor the pressure change of the carbon dioxide gas after the thermostat treatment in real time, and correct or prompt the pressure fluctuation. Through the control pressure gauge 7, the pressure state of the gas can be grasped in real time, the pressure of the carbon dioxide gas entering the proportioning valve 4 is ensured to be stable, and feedback is provided for the temperature control of the thermostat 6.

[0029] The carbon dioxide delivery pipeline 2 comprises a ball valve 21, a pressure controller 22, an input pressure gauge 23 and a one-way valve 24 arranged in sequence along the gas flow direction, and the balance valve 3 is located between the input pressure gauge 23 and the one-way valve 24. The ball valve 21 is used to control the opening and closing of the carbon dioxide gas passage, the pressure controller 22 is used to preliminarily limit the output gas pressure, and the input pressure gauge 23 is used to monitor the gas pressure value output by the pressure controller 22. The one-way valve 24 is located between the balance valve 3 and the cold trap 5, which ensures the one-way flow of the gas flow and prevents the backflow of the gas cooled by the cold trap 5 from interfering with the pressure control of the whole system.

[0030] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and embodiments having the same technical idea and playing the same role and effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, within the scope of the main idea of the present application, various modifications of the embodiments that can be thought of by those skilled in the art, and other ways constructed by combining part of the constituent elements of the embodiments are also included in the scope of the present application.

Claims

1. A gas mixing system with a carbon dioxide water removal device, characterized by, The application relates to a carbon dioxide delivery pipeline (2) and an argon delivery pipeline (1), wherein a balance valve (3) is arranged between the middle of the path of the argon delivery pipeline (1) and the middle of the path of the carbon dioxide delivery pipeline (2), and the end of the path of the argon delivery pipeline (1) and the end of the path of the carbon dioxide delivery pipeline (2) are communicated through a proportioning valve (4). A cold trap (5) and a thermostat (6) are arranged in sequence along the gas flow direction on the carbon dioxide delivery pipeline (2) between the balance valve (3) and the proportioning valve (4). The thermostat (6) comprises a heating assembly (61) and a coil assembly (62), the two ends of the coil assembly (62) are communicated with the carbon dioxide delivery pipeline (2), and the heating assembly (61) is used for controlling the temperature of the coil assembly (62).

2. A gas mixing system with carbon dioxide water removal device according to claim 1, characterized in that, A temperature detector (63) is arranged at the output end of the coil assembly (62).

3. A gas mixing system with carbon dioxide water removal device according to claim 2, characterized in that, The thermostat (6) further comprises a thermostat box (64), the coil assembly (62) is immersed in a water bath in the thermostat box (64), and the heating assembly (61) is used for controlling the temperature of the water bath in the thermostat box (64).

4. The gas mixing system with carbon dioxide water removal device according to claim 2, characterized in that, A control pressure gauge (7) is arranged between the thermostat (6) and the proportioning valve (4).

5. The gas mixing system with carbon dioxide water removal device of claim 1, wherein, The carbon dioxide delivery pipeline (2) comprises a ball valve (21), a pressure controller (22), an input pressure gauge (23) and a one-way valve (24) arranged in sequence along the gas flow direction, and the balance valve (3) is arranged between the input pressure gauge (23) and the one-way valve (24).

6. A gas mixing system with carbon dioxide water removal device according to claim 1, characterized in that, ​

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