Nitrogen making machine control device suitable for injection molding machine production mode

Abstract

The utility model relates to a nitrogen making machine control device suitable for a production mode of an injection molding machine, which belongs to the technical field of nitrogen preparation equipment and comprises a nitrogen making system, the output end of the nitrogen making system is connected with a nitrogen buffer tank, and the outer side of the nitrogen buffer tank is respectively connected with a nitrogen waste gas storage tank and a nitrogen high-pressure gas storage tank; the input end of the nitrogen making system and the output end of the nitrogen high-pressure gas storage tank are each provided with an electric control valve, manual control valves are installed beside the two electric control valves in parallel, and the two electric control valves are both in circuit connection with a laser cutting starting button on the laser cutting machine. A pressure gauge is installed on the nitrogen waste gas storage tank, and a waste gas tank gas outlet valve is installed at the output end of the nitrogen waste gas storage tank. According to the nitrogen making machine control device suitable for the injection molding machine production mode, the working efficiency is improved, the energy consumption is reduced, the production cost is reduced, and the automatic production level of a workshop is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen preparation equipment, in particular to a nitrogen generator control device suitable for an injection molding machine production mode. Background Art

[0002] The injection molding machine industry is an important field in the manufacturing industry. Currently, the injection molding machine industry mostly uses bottled liquid nitrogen or liquid nitrogen towers for sheet metal laser cutting. The transportation and procurement costs are relatively expensive. The nitrogen generator is a device that produces nitrogen by separating air. Its use cost is relatively low. In the injection molding machine industry, the use of nitrogen generators can bring many advantages such as reducing processing costs and reducing corporate risks.

[0003] However, the application of existing nitrogen generators in the injection molding machine industry still has the following problems:

[0004] (1) Laser cutting machines have minimum requirements for nitrogen purity when using nitrogen. Nitrogen generators generally need to reach 99.95% in the nitrogen purity monitoring system before they can output nitrogen. Some companies' injection molding machine laser cutting does not require 24-hour continuous processing. After employees turn off the nitrogen generator after work, they need to turn on the nitrogen generator and re-purify it before going to work each time. They need to wait for the purity in the nitrogen buffer tank to reach 99.99% before starting processing. It takes about 40 minutes to wait, which reduces production efficiency.

[0005] (2) If the nitrogen generator is not turned off, the nitrogen in the nitrogen buffer tank will be mixed with air and the purity will not meet the standard. The nitrogen in the nitrogen high-pressure storage tank will escape from the downstream laser cutting machine. After the nitrogen pressure in the tank drops, the nitrogen generator will start to produce nitrogen and increase the pressure. Frequent opening of the air compressor and nitrogen generator will increase energy consumption in the production process and increase production costs.

[0006] (3) The nitrogen output from the drain valve is only high-purity nitrogen that does not meet the purity requirement of 99.99%. The concentration is also higher than the nitrogen produced in the air compressor. There is a certain degree of waste if it is directly discharged into the air without being reused.

[0007] Based on this, a nitrogen generator control device suitable for the injection molding machine production mode is proposed to solve the above problems. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides a nitrogen generator control device suitable for the injection molding machine production mode, which improves work efficiency, reduces energy consumption, reduces production costs, improves the level of automated production in the workshop, and solves the problems in the prior art.

[0009] To achieve the above object, the utility model provides the following technical solutions: a nitrogen generator control device suitable for an injection molding machine production mode, comprising a nitrogen making system, wherein the output end of the nitrogen making system is connected to a nitrogen buffer tank, and the outer sides of the nitrogen buffer tank are respectively connected to a nitrogen waste gas storage tank and a nitrogen high-pressure gas storage tank;

[0010] The input end of the nitrogen production system and the output end of the nitrogen high-pressure gas storage tank are both provided with electric control valves, and manual control valves are installed in parallel beside the two electric control valves, and the two electric control valves are connected to the laser cutting start button circuit on the laser cutting machine;

[0011] A pressure gauge is installed on the nitrogen waste gas storage tank, and a waste gas tank outlet valve is installed at the output end of the nitrogen waste gas storage tank. An air compressor outlet valve is also provided at the input end of the nitrogen production system. The air compressor outlet valve is placed at the front end of the electric control valve outside the nitrogen production system, and the waste gas tank outlet valve is connected to the air compressor outlet valve.

[0012] Furthermore, the nitrogen production system is composed of two adsorption towers, and a uniform diffuser is installed at the lower part of the two adsorption towers.

[0013] Furthermore, a nitrogen purity monitoring and exhaust system is provided at the output end of the nitrogen buffer tank.

[0014] Furthermore, a drain valve is provided between the nitrogen purity monitoring and draining system and the nitrogen waste gas storage tank, and a booster is installed between the nitrogen purity monitoring and draining system and the nitrogen high-pressure gas storage tank.

[0015] Furthermore, a gas transmission control valve is provided between the nitrogen purity monitoring and exhaust system and the booster.

[0016] Compared with the prior art, the utility model provides a nitrogen generator control device suitable for the production mode of an injection molding machine, which has the following beneficial effects:

[0017] 1. This nitrogen generator control device suitable for the injection molding machine production mode reduces the downtime waiting time of employees before daily work compared to the previous shutdown of the equipment, and reduces the nitrogen re-generating time from 30-40 minutes to 5-10 minutes, thereby improving work efficiency.

[0018] 2. Compared with the previous situation where the equipment was not shut down, the nitrogen generator control device suitable for the production mode of the injection molding machine reduces the energy consumption from about 20kwh to less than 1kwh in the standby state throughout the night. It can also reduce energy consumption during the normal daytime idle time, thereby reducing production costs.

[0019] 3. The nitrogen generator control device suitable for the injection molding machine production mode is linked to the laser cutting machine, which improves the automation production level of the workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the nitrogen production system of the utility model;

[0022] Figure 3 The utility model is a flow chart of the use of the nitrogen generator control device.

[0023] In the figure: 1. Nitrogen production system; 101. Adsorption tower; 102. Equalizing diffuser; 2. Manual control valve; 3. Electric control valve; 4. Drain valve; 5. Nitrogen waste gas storage tank; 6. Pressure gauge; 7. Waste gas tank outlet valve; 8. Air compressor outlet valve; 9. Nitrogen high-pressure gas storage tank; 10. Nitrogen buffer tank; 11. Nitrogen purity monitoring and draining system; 12. Booster; 13. Gas transmission control valve; 14. Laser cutting start button. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figures 1 to 3 In this embodiment, a nitrogen generator control device suitable for an injection molding machine production mode includes a nitrogen making system 1. The output end of the nitrogen making system 1 is connected to a nitrogen buffer tank 10, and the outer sides of the nitrogen buffer tank 10 are respectively connected to a nitrogen waste gas storage tank 5 and a nitrogen high-pressure gas storage tank 9.

[0026] The nitrogen production system 1 is composed of two adsorption towers 101 , and a uniform diffuser 102 is installed at the lower part of the two adsorption towers 101 .

[0027] In this embodiment, the input end of the nitrogen production system 1 and the output end of the nitrogen high-pressure gas storage tank 9 are both provided with electric control valves 3, and manual control valves 2 are installed in parallel beside the two electric control valves 3. The two electric control valves 3 are both circuit-connected to the laser cutting start button 14 on the laser cutting machine.

[0028] In this embodiment, a pressure gauge 6 is installed on the nitrogen waste gas storage tank 5, and a pressure sensor is provided on the pressure gauge 6. A waste gas tank outlet valve 7 is installed at the output end of the nitrogen waste gas storage tank 5. An air compressor outlet valve 8 is also provided at the input end of the nitrogen making system 1. The air compressor outlet valve 8 is placed at the front end of the electric control valve 3 outside the nitrogen making system 1, and the waste gas tank outlet valve 7 is connected to the air compressor outlet valve 8.

[0029] It should be supplemented that a nitrogen purity monitoring and emptying system 11 is provided at the output end of the nitrogen buffer tank 10, wherein an emptying valve 4 is provided between the nitrogen purity monitoring and emptying system 11 and the nitrogen waste gas storage tank 5, a booster compressor 12 is installed between the nitrogen purity monitoring and emptying system 11 and the nitrogen high-pressure gas storage tank 9, and a gas transmission control valve 13 is provided between the nitrogen purity monitoring and emptying system 11 and the booster compressor 12.

[0030] The working principle of the above embodiment is:

[0031] (1) Two electric control valves 3 are added in front of the nitrogen production system 1 and at the outlet of the nitrogen high-pressure gas storage tank 9, and a timer is connected in series in the control circuit. The laser cutting start button 14 of the laser cutting machine provides a signal. After the laser cutting machine is started, the relay is closed, the electric control valve 3 is opened, and the timer works. If the signal is continuously received, the timer is reset. If no signal is received again within 40 minutes, the relay is disconnected, the compressor stops working, the electric control valve 3 is closed, the nitrogen high-pressure gas storage tank 9 enters the pressure-maintaining state, and the nitrogen production system 1 enters the standby state;

[0032] (2) To prevent the electric control valve 3 from delaying production due to failure, a normally closed manual control valve 2 is connected in parallel next to it. When the electric control valve 3 fails, the manual control valve 2 can be opened to allow normal operation. After get off work, the manual control valve 2 can be closed to maintain high-pressure nitrogen pressure, thereby reducing production costs.

[0033] (3) The original drain valve 4 is connected to the nitrogen waste gas storage tank 5. The nitrogen waste gas storage tank 5 is equipped with a pressure gauge 6. The pressure in the nitrogen waste gas storage tank 5 is monitored by the pressure sensor on the pressure gauge 6. When the pressure of the nitrogen waste gas storage tank 5 reaches 0.3 MPa, the air compressor outlet valve 8 is cut off, the waste gas tank outlet valve 7 is opened, and the air source of the nitrogen production system 1 is switched to the higher concentration of nitrogen in the nitrogen waste gas storage tank 5. After the pressure of the nitrogen waste gas storage tank 5 drops, the air compressor outlet valve 8 is opened, the waste gas tank outlet valve 7 is closed, and the air source of the nitrogen production system 1 is switched to the clean air in the air compressor.

[0034] The installation method, connection method or setting method disclosed in this embodiment are all common mechanical methods, and they can be implemented as long as they can achieve their beneficial effects. In addition, the electrical components appearing in the text are all electrically connected to the main controller and the power supply. The main controller is a conventional known device, and there is an existing disclosed power connection technology. Therefore, the text will not go into too much detail on its specific structural composition and working principle.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nitrogen generator control device suitable for an injection molding machine production mode, comprising a nitrogen generating system (1), wherein the output end of the nitrogen generating system (1) is connected to a nitrogen buffer tank (10), and the outer sides of the nitrogen buffer tank (10) are respectively connected to a nitrogen waste gas storage tank (5) and a nitrogen high-pressure gas storage tank (9), wherein: The input end of the nitrogen production system (1) and the output end of the nitrogen high-pressure gas storage tank (9) are both provided with electric control valves (3), and manual control valves (2) are installed in parallel beside the two electric control valves (3), and the two electric control valves (3) are both connected to the laser cutting start button (14) on the laser cutting machine; A pressure gauge (6) is installed on the nitrogen waste gas storage tank (5), and a waste gas tank outlet valve (7) is installed at the output end of the nitrogen waste gas storage tank (5). An air compressor outlet valve (8) is also provided at the input end of the nitrogen production system (1). The air compressor outlet valve (8) is placed at the front end of the electric control valve (3) outside the nitrogen production system (1), and the waste gas tank outlet valve (7) is connected to the air compressor outlet valve (8).

2. A nitrogen generator control device suitable for injection molding machine production mode according to claim 1, characterized in that: The nitrogen production system (1) is composed of two adsorption towers (101), and a uniform diffuser (102) is installed at the bottom of the two adsorption towers (101).

3. A nitrogen generator control device suitable for injection molding machine production mode according to claim 1, characterized in that: The output end of the nitrogen buffer tank (10) is provided with a nitrogen purity monitoring and exhaust system (11).

4. A nitrogen generator control device suitable for injection molding machine production mode according to claim 3, characterized in that: A drain valve (4) is provided between the nitrogen purity monitoring and draining system (11) and the nitrogen waste gas storage tank (5), and a booster (12) is installed between the nitrogen purity monitoring and draining system (11) and the nitrogen high-pressure gas storage tank (9).

5. A nitrogen generator control device suitable for injection molding machine production mode according to claim 4, characterized in that: A gas delivery control valve (13) is provided between the nitrogen purity monitoring and exhaust system (11) and the booster (12).

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