System for intensively supplying inert protective gas in field welding

Abstract

The utility model discloses a system for intensively supplying inert protective gas in field welding, belongs to the technical field of gas supply for welding, and aims to solve the problems that in the existing construction project with large welding workload and concentrated welding positions, a 40L bottled argon gas supply mode is high in gas cylinder replacement rate, and the gas supply efficiency is low. And the problems of unstable gas supply, poor welding quality, high safety risk, high cost and resource waste are solved. The device comprises a plurality of Dewar tanks, an electromagnetic switching valve, an air bath type vaporizer, a main distribution disc and a plurality of secondary distribution discs, the outlet ends of the Dewar tanks are communicated with the inlet end of the electromagnetic switching valve, the outlet end of the electromagnetic switching valve is communicated with the inlet end of the air bath type vaporizer, the outlet end of the air bath type vaporizer is communicated with the inlet end of the main distribution disc, and the outlet end of the secondary distribution disc is communicated with the outlet end of the main distribution disc. The main distribution disc and the secondary distribution disc are provided with a plurality of outlet ends, the outlet end of the main distribution disc is communicated with the inlet end of the secondary distribution disc through a connecting pipe, and the outlet end of the secondary distribution disc is communicated with an air supply pipe. The utility model is suitable for the on-site welding centralized gas supply system.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding gas supply, and particularly relates to a system for centralized supply of inert protective gas for on-site welding. Background Art

[0002] With the development and progress of science and technology, in construction projects such as new construction or maintenance of petrochemical plants where the welding workload is large and the welding positions are concentrated, the traditional method of supplying argon gas in ordinary 40L cylinders can no longer meet the requirements of safety, quality, efficiency, energy conservation, emission reduction, quality improvement, efficiency increase and labor intensity reduction in current pipeline welding construction.

[0003] If the welded material requires internal or back argon protection, due to the capacity problem of 40L cylinders, it is impossible to meet the simultaneous operation of the argon welding torch and argon backfilling protection. Then a welder needs to use two cylinders of argon gas simultaneously to carry out normal welding construction. In order to ensure the welding quality and efficiency, welders usually prepare 2-3 additional cylinders of argon gas as backups beside the welding machine. In actual operation, the 40L cylinder gas supply mainly has the following defects:

[0004] 1. Frequent cylinder replacement: Due to the relatively small capacity of 40L cylinders of argon gas, for continuous or large-scale welding operations, frequent cylinder replacement is required, which not only increases the labor intensity but also affects the continuity and efficiency of welding operations.

[0005] 2. Unstable gas supply: Frequent cylinder replacement may lead to unstable gas supply during the process, affecting the welding quality. Especially during welding, fluctuations in gas pressure may cause unstable welding parameters, thus affecting the quality of the weld.

[0006] 3. Safety risks: When replacing cylinders, operators need to carry and connect them frequently, which increases the safety risks during the operation. In addition, the storage and handling of cylinders also need to comply with safety regulations, otherwise potential safety hazards may be caused.

[0007] 4. Cost issues: Although the cost of a single 40L cylinder of inert gas is not high, frequent replacement and handling of cylinders will increase additional labor and time costs. In the long run, this will increase the overall cumulative cost of welding operations.

[0008] 5. Resource waste: Frequent cylinder replacement means more use of packaging materials and transportation resources, which not only increases the environmental burden but also causes waste of resources.

[0009] 6. Pressure loss: During the use of cylinders, as the gas is consumed, the pressure inside the cylinders will gradually decrease, which may lead to unstable gas flow during welding, affecting the welding effect.

[0010] 7. Gas purity issue: When frequently replacing gas cylinders or during the use of bottled argon gas, air or other impurities may be mixed in, affecting the purity of argon gas and thus the welding quality. Summary of the Invention

[0011] The purpose of the present utility model is to provide a system for centralized supply of inert protective gas for on-site welding, which solves the problems of unstable gas supply, poor welding quality, high safety risks, high costs, and resource waste caused by the high replacement rate of 40L bottled argon gas in construction projects with large welding workloads and concentrated welding positions.

[0012] The technical solution adopted by the present utility model is as follows:

[0013] A system for centralized supply of inert protective gas for on-site welding includes a plurality of Dewar flasks, electromagnetic switching valves, air-bath vaporizers, a main distribution panel, and a plurality of secondary distribution panels. The outlet end of the Dewar flask is connected to the inlet end of the electromagnetic switching valve, the outlet end of the electromagnetic switching valve is connected to the inlet end of the air-bath vaporizer, the outlet end of the air-bath vaporizer is connected to the inlet end of the main distribution panel. The main distribution panel is provided with a plurality of outlet ends, and the outlet ends of the main distribution panel are connected to the inlet ends of the secondary distribution panels through connecting pipes. The secondary distribution panels are provided with a plurality of outlet ends, and the outlet ends of the secondary distribution panels are connected to gas supply pipes. Valves and argon gas meters are installed on the secondary distribution panels, and liquid argon is provided in the Dewar flasks.

[0014] Further, the outlet end of the electromagnetic switching valve is connected to the inlet end of the air-bath vaporizer through a metal hose, and the outlet end of the air-bath vaporizer is connected to the inlet end of the main distribution panel through a metal hose.

[0015] Further, the connecting pipes are oxygen rubber hoses or acetylene rubber hoses.

[0016] Further, a safety valve is installed on the Dewar flask, an electronic control pressure gauge is installed on the Dewar flask, and the electronic control pressure gauge is electrically connected to the electromagnetic switching valve.

[0017] Further, valves are installed at the outlet ends of the Dewar flask and the outlet ends of the air-bath vaporizer.

[0018] Further, the gas supply pipes are oxygen rubber hoses or acetylene rubber hoses.

[0019] Further, the volume of the Dewar flask is 210L.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0021] 1. In the present utility model, a Dewar flask is used to store liquid argon, and an air-bath vaporizer is used to convert liquid argon into argon. The argon is supplied in a centralized, simultaneous, and continuous manner for welding gas and internal protection gas through the main distribution plate, connecting pipe, secondary distribution plate, and gas supply pipe, effectively solving the problems of unstable gas supply, poor welding quality, high safety risk, high cost, and resource waste caused by the high replacement rate of traditional 40L gas cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings, where:

[0023] Figure 1 is the system structure diagram of the present utility model;

[0024] Reference numerals in the figure: 1 - Dewar flask, 2 - electromagnetic switching valve, 3 - air-bath vaporizer, 4 - main distribution plate, 5 - secondary distribution plate, 6 - connecting pipe, 7 - gas supply pipe, 8 - valve, 9 - argon meter, 10 - safety valve, 11 - electronic control pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0027] It should be noted that the reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and is a simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", etc. do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] A system for centrally supplying inert protective gas for on-site welding includes a plurality of Dewar flasks, electromagnetic switching valves, air-bath vaporizers, a main distribution panel, and a plurality of secondary distribution panels. The outlet end of the Dewar flask is communicated with the inlet end of the electromagnetic switching valve, the outlet end of the electromagnetic switching valve is communicated with the inlet end of the air-bath vaporizer, the outlet end of the air-bath vaporizer is communicated with the inlet end of the main distribution panel. The main distribution panel is provided with a plurality of outlet ends, the outlet ends of the main distribution panel are communicated with the inlet ends of the secondary distribution panels through connecting pipes, the secondary distribution panels are provided with a plurality of outlet ends, the outlet ends of the secondary distribution panels are communicated with gas supply pipes, and valves and argon meters are installed on the secondary distribution panels. Liquid argon is provided in the Dewar flasks.

[0032] Further, the outlet end of the electromagnetic switching valve is communicated with the inlet end of the air-bath vaporizer through a metal hose, and the outlet end of the air-bath vaporizer is communicated with the inlet end of the main distribution panel through a metal hose.

[0033] Further, the connecting pipe is an oxygen hose or an acetylene hose.

[0034] Further, a safety valve is installed on the Dewar flask, and an electronic control pressure gauge is installed on the Dewar flask. The electronic control pressure gauge is electrically connected to the electromagnetic switching valve.

[0035] Further, a valve is installed at the outlet end of the Dewar flask, and a valve is installed at the outlet end of the air-bath vaporizer.

[0036] Further, the gas supply pipe is an oxygen rubber hose or an acetylene rubber hose.

[0037] Further, the volume of the Dewar flask is 210L.

[0038] In the implementation process of the present utility model, a Dewar flask is used to store liquid argon, and the liquid argon is converted into argon gas through an air-bath vaporizer. The argon gas is supplied in a centralized, simultaneous, and continuous manner through the main distribution plate, connecting pipe, secondary distribution plate, and gas supply pipe for welding gas and internal protection gas. Compared with the traditional 40L gas cylinder for gas supply, it has the following advantages:

[0039] 1. The 40L gas cylinder has a small capacity and a high gas cylinder replacement rate. However, the large-capacity unified gas supply system of the present system effectively reduces the number of gas cylinders and the replacement frequency, is convenient and fast to use, saves the time for replacing gas cylinders, improves the pipeline welding efficiency and construction progress, and reduces safety risks.

[0040] 2. After gas replacement, air enters the rubber hose, the replacement is slow, and a large amount of gas is wasted. There is a risk of air being brought in at the damaged part of the rubber hose. The air pressure output of the present system is stable, the flow rate is uniform, and the argon gas can maintain a high purity of 99.999% for a long time, improving the quality of the argon arc weld and the back protection gas, and reducing the risk of weld unqualified due to the protection gas.

[0041] 3. Using liquid argon as the initial raw material can effectively reduce the number of bottled argon gas, reduce potential safety hazards and construction costs.

[0042] 4. The larger and more concentrated the welding volume is, the more the centralized gas supply system can reflect its lower cost, higher safety, better quality, lower labor intensity, and higher cost-effectiveness ratio.

[0043] Example 1

[0044] A system for centrally supplying inert protective gas for on-site welding, comprising a plurality of Dewar flasks, electromagnetic switching valves, air-bath vaporizers, a main distribution panel, and a plurality of secondary distribution panels. The outlet end of the Dewar flask is communicated with the inlet end of the electromagnetic switching valve, the outlet end of the electromagnetic switching valve is communicated with the inlet end of the air-bath vaporizer, the outlet end of the air-bath vaporizer is communicated with the inlet end of the main distribution panel. The main distribution panel is provided with a plurality of outlet ends, and the outlet ends of the main distribution panel are communicated with the inlet ends of the secondary distribution panels through connecting pipes. The secondary distribution panels are provided with a plurality of outlet ends, and the outlet ends of the secondary distribution panels are communicated with gas supply pipes. Valves and argon gauges are installed on the secondary distribution panels, and liquid argon is provided in the Dewar flasks.

[0045] Example 2

[0046] On the basis of Example 1, the outlet end of the electromagnetic switching valve is communicated with the inlet end of the air-bath vaporizer through a metal hose, and the outlet end of the air-bath vaporizer is communicated with the inlet end of the main distribution panel through a metal hose.

[0047] Example 3

[0048] On the basis of the above embodiments, the connecting pipe is an oxygen hose or an acetylene hose.

[0049] Example 4

[0050] On the basis of the above embodiments, a safety valve is installed on the Dewar flask, an electronic control pressure gauge is installed on the Dewar flask, and the electronic control pressure gauge is electrically connected to the electromagnetic switching valve.

[0051] Example 5

[0052] On the basis of the above embodiments, a valve is installed at the outlet end of the Dewar flask, and a valve is installed at the outlet end of the air-bath vaporizer.

[0053] Example 6

[0054] On the basis of the above embodiments, the gas supply pipe is an oxygen hose or an acetylene hose.

[0055] Example 7

[0056] On the basis of the above embodiments, the volume of the Dewar flask is 210L.

[0057] The above is the embodiment of the present utility model. The foregoing are the various preferred embodiments of the present utility model. If the preferred implementation manners in the various preferred embodiments are not obviously self-contradictory or premised on a certain preferred implementation manner, the various preferred implementation manners can be arbitrarily superimposed and combined for use. The embodiments and the specific parameters in the embodiments are only for clearly expressing the verification process of the utility model, and are not used to limit the patent protection scope of the present utility model. The patent protection scope of the present utility model still takes its claims as the criterion. All equivalent structural changes made by using the content of the specification and drawings of the present utility model should, by the same token, be included in the protection scope of the present utility model.

Claims

1. A system for centralized supply of inert shielding gas for on-site welding, characterized in that: The invention comprises a plurality of dewar tanks (1), an electromagnetic switching valve (2), an air bath type vaporizer (3), a main distribution plate (4), and a plurality of secondary distribution plates (5). The outlet end of the dewar tank (1) is connected to the inlet end of the electromagnetic switching valve (2), the outlet end of the electromagnetic switching valve (2) is connected to the inlet end of the air bath type vaporizer (3), the outlet end of the air bath type vaporizer (3) is connected to the inlet end of the main distribution plate (4), the main distribution plate (4) is provided with a plurality of outlet ends, the outlet end of the main distribution plate (4) is connected to the inlet end of the secondary distribution plate (5) through a connecting pipe (6), the secondary distribution plate (5) is provided with a plurality of outlet ends, the outlet end of the secondary distribution plate (5) is connected to a gas supply pipe (7), the secondary distribution plate (5) is installed with a valve (8) and an argon meter (9), and liquid argon is provided in the dewar tank (1).

2. A system for centralized supply of inert shielding gas for on-site welding according to claim 1, characterized in that: The outlet end of the electromagnetic switching valve (2) is connected to the inlet end of the air bath type vaporizer (3) through a metal hose, and the outlet end of the air bath type vaporizer (3) is connected to the inlet end of the main distribution plate (4) through a metal hose.

3. A system for centralized supply of inert shielding gas for on-site welding according to claim 1, characterized in that: The connecting pipe (6) is an oxygen hose or an acetylene hose.

4. A system for centralized supply of inert shielding gas for on-site welding according to claim 1, characterized in that: The dewar tank (1) is provided with a safety valve (10), and the dewar tank (1) is provided with an electric control pressure gauge (11), and the electric control pressure gauge (11) is connected to the electromagnetic switching valve (2) via an electrical signal.

5. A system for centralized supply of inert shielding gas for on-site welding according to claim 1, characterized in that: The outlet end of the Dewar tank (1) is provided with a valve (8), and the outlet end of the air bath vaporizer (3) is provided with a valve (8).

6. A system for centralized supply of inert shielding gas for on-site welding according to claim 1, characterized in that: The gas supply pipe (7) is an oxygen hose or an acetylene hose.

7. A system for centralized supply of inert shielding gas for on-site welding according to claim 1, characterized in that: The volume of the Dewar tank (1) is 210L.

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