Integrated multi-mode cutting gas source generating device

Abstract

An integrated multi-mode cutting gas source generating device relates to the technical field of laser cutting and comprises a bottom pry, and an air compressor, a freezing dryer, an air filtering system, an air storage tank, a gas source switching system, a pressure swing adsorption nitrogen generation unit, a nitrogen storage tank, an electrical control system, an oil-free supercharger, a high-pressure tank and a nitrogen filtering system are integrated on the bottom pry. Wherein the air compressor, the freezing dryer, the air filtering system and the air storage tank are sequentially connected, the air storage tank is connected with the air source switching system and the pressure swing adsorption nitrogen generation unit, and the air source switching system and the pressure swing adsorption nitrogen generation unit are both connected with the nitrogen storage tank. According to the cutting gas source generating device, a compressed air mode and a nitrogen mode are adopted, the advantages of a nitrogen source and an air source are combined, the cutting gas source generating device is selected according to actual working conditions, and energy conservation, consumption reduction and cost reduction are achieved for clients.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting, in particular to an integrated multi-mode cutting gas source generating device. Background Art

[0002] At present, the auxiliary gases commonly used in laser cutting machines include: oxygen, nitrogen, and compressed air. Oxygen is mainly used to cut carbon steel materials. During cutting, oxygen and iron elements react thermochemically, which can improve cutting efficiency, achieve cutting of thicker materials, and significantly improve the processing capacity of laser cutting machines. However, due to the presence of oxygen, an obvious oxide film will be produced on the end face of the cut, and a quenching effect will be produced on the material around the cut surface, which will increase the hardness and have a certain impact on subsequent processing. The end face of the cut will appear black or dark yellow. Because oxygen is a flammable and explosive gas, the oxygen production and storage process is relatively dangerous and costly; Nitrogen is mainly used to cut stainless steel, galvanized sheet, aluminum and aluminum alloy, brass and other materials. During cutting, nitrogen will form a protective layer around the molten metal to prevent the metal from being oxidized and avoid the formation of an oxide film, thus achieving oxygen-free cutting. The non-oxidized cut surface has the characteristics of being directly welded, smeared, and having strong corrosion resistance. When the cutting surface precision is high, nitrogen cutting can be used; Compressed air cutting has a wide range of applications, is easier to obtain than oxygen and nitrogen, and is very cheap. Although the air contains only 20% oxygen, the cutting efficiency of air is higher than that of nitrogen.

[0003] Therefore, considering the cutting ability, precision and application range of the cutting machine gas source, it is urgent to develop a multi-mode cutting gas source device to make the cutting equipment more widely used. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide an integrated multi-mode cutting gas source generating device that can solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An integrated multi-mode cutting gas source generating device comprises a base skid, on which an air compressor, a cold dryer, an air filtration system, an air storage tank, a gas source switching system, a pressure swing adsorption nitrogen making unit, a nitrogen storage tank, an electrical control system, an oil-free booster, a high-pressure tank and a nitrogen filtration system are integrated; wherein the air compressor, the cold dryer, the air filtration system and the air storage tank are connected in sequence, the air storage tank is connected with the gas source switching system and the pressure swing adsorption nitrogen making unit, the gas source switching system and the pressure swing adsorption nitrogen making unit are both connected to the nitrogen storage tank, and the nitrogen storage tank, the oil-free booster, the high-pressure tank and the nitrogen filtration system are connected in sequence.

[0007] Preferably, the pressure swing adsorption nitrogen production unit comprises an adsorption tower 1 and an adsorption tower 2, wherein the adsorption tower 1 and the adsorption tower 2 are connected in series, and a lower air distribution pipe is installed at the lower end inlet of the adsorption tower 1 and the adsorption tower 2, and an upper air distribution pipe is installed at the upper end outlet, and filtering mineral screen pipes are installed on the upper air distribution pipe and the lower air distribution pipe.

[0008] Preferably, the screen bar size of the filtering ore screen pipe is 1.5 mm*2 mm, and the annular screen bar spacing is ≤0.5 mm.

[0009] Preferably, coconut palm mats are provided on the tops of the first and second adsorption towers.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model adopts a cutting gas source generating device with two modes, compressed air and nitrogen, combines the advantages of nitrogen gas source and air gas source, and selects them according to actual working conditions, so as to achieve energy saving and consumption reduction and reduce costs for customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the adsorption tower structure of the utility model;

[0014] Figure 3 It is a schematic diagram of the installation structure of the filter type ore screen pipe on the upper air pipe of the utility model;

[0015] Figure 4 The utility model is a schematic diagram of the installation structure of the filtering type ore screen pipe on the lower air pipe.

[0016] Description of reference numerals:

[0017] 1- skid, 2- air compressor, 3- cold dryer, 4- air filtration system, 5- air storage tank, 6- air source switching system, 7- pressure swing adsorption nitrogen production unit, 8- nitrogen storage tank, 9- electrical control system, 10- oil-free booster, 11- high pressure tank, 12- nitrogen filtration system, 13- lower air pipe, 14- upper air pipe, 15- filter type mine screen pipe, 16- coconut palm mat. DETAILED DESCRIPTION

[0018] The following is a detailed description of the invention of the utility model by way of examples in conjunction with the accompanying drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Example

[0019] like Figures 1 to 4 As shown, the utility model discloses an integrated multi-mode cutting gas source generating device, including a base skid 1, on which an air compressor 2, a cold dryer 3, an air filtration system 4, an air storage tank 5, an air source switching system 6, a pressure swing adsorption nitrogen making unit 7, a nitrogen storage tank 8, an electrical control system 9, an oil-free supercharger 10, a high-pressure tank 11 and a nitrogen filtration system 12 are integrated; wherein, the air compressor 2, the cold dryer 3, the air filtration system 4 and the air storage tank 5 are connected in sequence, the cold dryer 3 and the air filtration system 4 are used to filter the compressed air and store the air in the air storage tank 5, and the oil removal filter in the air filtration system 4 adopts a Nautilus filter, which can meet the oil removal accuracy of 0.0009ppm; the air storage tank 5 is connected with the air source switching system 6 and the pressure swing adsorption nitrogen making unit 7. The gas source switching system 6 is used for switching between air and nitrogen modes, and the pressure swing adsorption nitrogen production unit 7 is used for producing nitrogen, and the purity of nitrogen can be customized according to customer needs; the gas source switching system 6 and the pressure swing adsorption nitrogen production unit 7 are both connected to the nitrogen storage tank 8, and the nitrogen storage tank 8 is used to store and buffer nitrogen; the nitrogen storage tank 8, the oil-free booster 10, the high-pressure tank 11 and the nitrogen filtration system 12 are connected in sequence, the oil-free booster 10 is used to provide a high-pressure gas source, the high-pressure tank 11 is used to store and buffer high-pressure gas, and the nitrogen filtration system 12 is used to filter high-pressure nitrogen. The oil-free booster 10 and the nitrogen filtration system 12 can remove the gaseous water produced after compression to obtain a gas source that meets the requirements, and will not cause the gas source to be unclean, causing the laser beam to be dispersed due to the focus, resulting in the product not being cut through, having burrs, and having a rough cut surface.

[0020] The specific working principle is as follows:

[0021] The electrical control system 9 is used to start the equipment, provide power to the air compressor 2, cold dryer 3, pressure swing adsorption nitrogen production unit 7, oil-free booster 10 and other components, and operate the equipment. This application uses two gas source systems: compressed air and nitrogen. The specific process is as follows:

[0022] Nitrogen gas source mode: After being compressed by the air compressor 2, the air flows through the cold dryer 3 to remove water, and then the oil mist, dust particles and gaseous water in the compressed air are intercepted by the air filtration system 4 to obtain clean compressed air, which flows through the air storage tank 5, closes the switching valve in the gas source switching system 6, enters the pressure swing adsorption nitrogen production unit 7 to obtain compressed nitrogen, and then flows through the nitrogen storage tank 8, enters the oil-free booster 10 to obtain high-pressure nitrogen, flows through the high-pressure tank 11 and then passes through the nitrogen filtration system 12 to remove the dust particles generated by the pressure swing adsorption nitrogen production unit 7, thereby obtaining a clean high-pressure nitrogen gas source.

[0023] Air source mode: After being compressed by the air compressor 2, the air flows through the cold dryer 3 to remove water, and then the oil mist, dust particles and gaseous water in the compressed air are intercepted by the air filtration system 4 to obtain clean compressed air, which flows through the air storage tank 5, opens the switching valve in the air source switching system 6, flows through the nitrogen storage tank 8, enters the oil-free booster 10 to obtain high-pressure air, flows through the high-pressure tank 11 and then passes through the nitrogen filtration system 12, thereby obtaining a clean high-pressure air source.

[0024] Furthermore, in the present embodiment, the pressure swing adsorption nitrogen production unit 7 comprises an adsorption tower 1 and an adsorption tower 2, which are used to be filled with high-performance molecular sieves; the adsorption tower 1 and the adsorption tower 2 are connected in series, and a lower air distribution pipe 13 is installed at the lower inlet of the adsorption tower 1 and the adsorption tower 2, and an upper air distribution pipe 14 is installed at the upper outlet, and a filtering mineral sieve pipe 15 is installed on both the upper air distribution pipe 14 and the lower air distribution pipe 13, which is used to filter the molecular sieve and isolate the molecular sieve inside the adsorption tower, while distributing the intake airflow and the desorption airflow in the adsorption tower in an all-round and resistance-free manner.

[0025] The main working processes of adsorption tower 1 and adsorption tower 2 include "nitrogen production", "regeneration" and "pressure equalization". Compressed air is introduced into adsorption tower 1, and nitrogen is obtained by adsorbing oxygen in the compressed air through the nitrogen-making molecular sieve in the adsorption tower, which is called "nitrogen production". At the same time, the nitrogen-making molecular sieve in adsorption tower 2 is flushed with part of the nitrogen produced, and the oxygen adsorbed in the nitrogen-making molecular sieve is discharged, which is called "regeneration". When the nitrogen-making molecular sieve in adsorption tower 1 of "nitrogen production" is saturated with adsorption, "nitrogen production" and "regeneration" are suspended at the same time, and adsorption towers 1 and 2 that have completed "regeneration" and "nitrogen production" transfer the nitrogen in adsorption tower 1 to adsorption tower 2 through a process called "pressure equalization", so that the pressure of adsorption towers 1 and 2 is almost equal. Because the equipment has only two adsorption towers, no gas is discharged from the outlet during pressure equalization. At this time, the pressure and flow rate will decrease. A nitrogen storage tank 8 is installed after the pressure swing adsorption nitrogen production unit 7 to maintain a continuous supply of nitrogen during the pressure equalization state. After "pressure equalization", compressed air is introduced into adsorption tower 2 for "nitrogen production", and adsorption tower 1 is flushed with nitrogen and emptied for "regeneration". Adsorption tower 1 and adsorption tower 2 work alternately, and the on-off of the solenoid valve is controlled by the PLC program, thereby controlling the operation of the pneumatic pipeline valve, and automatically realizing the operating states of "nitrogen production", "regeneration" and "pressure equalization".

[0026] As shown in the following table:

[0027] Adsorption tower 1 Nitrogen production Pressure Balance regeneration Adsorption tower 2 regeneration Pressure Balance Nitrogen production

[0028] Furthermore, in this embodiment, the screen bar size of the filtering ore screen pipe 15 is 1.5 mm*2 mm, and the annular screen bar spacing is ≤0.5 mm.

[0029] Furthermore, in this embodiment, coconut palm mats 16 are provided on the tops of the first and second adsorption towers to prevent the molecular sieve from overflowing and pulverizing.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and application concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated multi-mode cutting gas source generating device, comprising a base skid (1), characterized in that: The skid (1) is integrated with an air compressor (2), a cold dryer (3), an air filtration system (4), an air storage tank (5), an air source switching system (6), a pressure swing adsorption nitrogen production unit (7), a nitrogen storage tank (8), an electrical control system (9), an oil-free booster (10), a high-pressure tank (11) and a nitrogen filtration system (12); wherein the air compressor (2), the cold dryer (3), the air filtration system (4) and the air storage tank (5) are connected in sequence, the air storage tank (5) is connected with the air source switching system (6) and the pressure swing adsorption nitrogen production unit (7), the air source switching system (6) and the pressure swing adsorption nitrogen production unit (7) are both connected with the nitrogen storage tank (8), and the nitrogen storage tank (8), the oil-free booster (10), the high-pressure tank (11) and the nitrogen filtration system (12) are connected in sequence.

2. The integrated multi-mode cutting gas source generating device as claimed in claim 1, characterized in that: The pressure swing adsorption nitrogen production unit (7) comprises an adsorption tower 1 and an adsorption tower 2, wherein the adsorption tower 1 and the adsorption tower 2 are connected in series, and a lower gas distribution pipe (13) is installed at the lower inlet of the adsorption tower 1 and the adsorption tower 2, and an upper gas distribution pipe (14) is installed at the upper outlet, and a filtering mineral screen pipe (15) is installed on both the upper gas distribution pipe (14) and the lower gas distribution pipe (13).

3. The integrated multi-mode cutting gas source generating device as claimed in claim 2, characterized in that: The screen bar size of the filtering ore screen tube (15) is 1.5 mm*2 mm, and the annular screen bar spacing is ≤0.5 mm.

4. The integrated multi-mode cutting gas source generating device as claimed in claim 2, characterized in that: Coconut palm mats (16) are provided on the tops of the first adsorption tower and the second adsorption tower.

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