Oxygen filling system

Abstract

The utility model discloses an oxygen filling system which comprises a liquid oxygen storage tank, a low-temperature liquid oxygen pump, a first gasifier, a second gasifier, a buffer tank and a filling busbar, the lower end of the liquid oxygen storage tank is communicated with a liquid inlet pipe and a liquid outlet pipe; a port of the liquid inlet pipe is communicated with a liquid inlet joint; the liquid outlet pipe is communicated with the inlet end of the low-temperature liquid oxygen pump; the outlet end of the low-temperature liquid oxygen pump is communicated with a first pipeline; and the first pipeline is communicated with the inlet end of the first gasifier. The control system has the advantages that the switching process of the first vaporizer and the second vaporizer is effectively improved by controlling the opening and closing of the electromagnetic valves through the controller, and when the working efficiency of the first vaporizer is reduced due to frosting, the third electromagnetic valve and the fifth electromagnetic valve are closed through the controller, and the fourth electromagnetic valve and the seventh electromagnetic valve are opened through the controller; therefore, the gasifier can be quickly switched, the continuous gasification process is ensured, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen filling, in particular to an oxygen filling system. Background Art

[0002] The oxygen filling system meets the needs of industrial and medical fields by converting cryogenic liquid oxygen into gaseous oxygen and filling it into oxygen cylinders. The system includes key components such as liquid oxygen storage tanks, vaporizers, filling equipment, and strict safety operating procedures to ensure the safety of the filling process and the quality of oxygen. Liquid oxygen storage tanks usually adopt a double-shell structure, and the maximum working pressure of the inner cylinder is 0.8MPa or 1.6MPa to ensure storage safety. However, the existing oxygen filling system has slow working efficiency when it is in operation. First, the finned tubes of the vaporizer are prone to frost during operation, and using only one set of vaporizers can easily slow down the speed of oxygen filling; secondly, the filling rack adopts a single-row method, which can easily lead to uneven gas filling. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an oxygen filling system which can ensure a stable and efficient oxygen filling process.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] An oxygen filling system comprises a liquid oxygen storage tank, a cryogenic liquid oxygen pump, a first vaporizer, a second vaporizer, a buffer tank, a filling bus, a molding press, and a pressure pump; the lower end of the liquid oxygen storage tank is connected with a liquid inlet pipe and a liquid outlet pipe; the liquid inlet pipe port is connected with a liquid inlet joint; the liquid outlet pipe is connected with the inlet end of the cryogenic liquid oxygen pump; the outlet end of the cryogenic liquid oxygen pump is connected with a first pipeline; the first pipeline is connected with the inlet end of the first vaporizer; the outlet end of the first vaporizer is connected with a second pipeline; the outlet end of the second pipeline is connected with the lower part of the buffer tank; the upper part of the buffer tank is connected with the pressure pump through a pipeline; the pressure pump is connected with the molding press through a pipeline; the molding press is connected with several filling busbars; the first pipeline is connected with a third pipeline; the second pipeline is connected with a fourth pipeline; the second vaporizer is connected between the third pipeline and the fourth pipeline.

[0006] Furthermore, it also includes a controller; a first solenoid valve is connected to the liquid outlet pipe; a second solenoid valve is connected between the low-temperature liquid oxygen pump and the third pipeline; a third solenoid valve is connected between the third pipeline and the first vaporizer; a fourth solenoid valve is connected to the third pipeline; a fifth solenoid valve is connected between the first vaporizer and the fourth pipeline; a sixth solenoid valve is connected between the buffer tank and the fourth pipeline; a seventh solenoid valve is connected to the third pipeline; the controller is electrically connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, and the seventh solenoid valve, respectively.

[0007] Furthermore, an eighth solenoid valve is connected to the pipeline between the buffer tank and the filling bus; the eighth solenoid valve is electrically connected to the controller.

[0008] Furthermore, the filling bus includes a first branch pipe, a second branch pipe, a third branch pipe, and a fourth branch pipe; the first branch pipe is symmetrically connected to two second branch pipes; the second branch pipe is symmetrically connected to two third branch pipes at one end away from the first branch pipe; four fourth branch pipes are evenly distributed on the third branch pipe; the fourth pipe is fixedly connected to a filling connector at one end away from the third pipe; the number of the filling connectors is 16 and they are distributed in four rows and four columns.

[0009] Furthermore, the liquid inlet pipe is connected to a sewage pipe; and the sewage pipe is provided with a sewage valve.

[0010] Furthermore, the first gasifier and the second gasifier are air-temperature gasifiers.

[0011] Furthermore, the first vaporizer and the second vaporizer are water bath vaporizers.

[0012] Beneficial effects of the utility model:

[0013] (1) By setting up a first vaporizer and a second vaporizer, the first vaporizer and the second vaporizer are in a standby and standby mode, which effectively ensures that the liquid oxygen is continuously vaporized during the filling operation, avoiding the need to stop the machine to defrost the vaporizer during the filling process;

[0014] (2) The controller controls the opening and closing of each solenoid valve, which effectively improves the switching process between the first vaporizer and the second vaporizer. When the first vaporizer is frosted and the working efficiency is reduced, the controller closes the third solenoid valve and the fifth solenoid valve and opens the fourth solenoid valve and the seventh solenoid valve, so that the vaporizer can be switched quickly to ensure the continuity of the vaporization process, thereby effectively improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a structural diagram of the charging bus.

[0017] In the figure, 1-liquid oxygen storage tank, 2-cryogenic liquid oxygen pump, 3-first vaporizer, 4-second vaporizer, 5-liquid inlet pipe, 6-liquid outlet pipe, 7-liquid inlet joint, 8-first pipeline, 9-second pipeline, 10-buffer tank, 11-charging bus, 12-third pipeline, 13-fourth pipeline, 14-controller, 15-first solenoid valve, 16-second solenoid valve, 17-third solenoid valve, 18-fourth solenoid valve, 19-fifth solenoid valve, 20-seventh solenoid valve, 21-sixth solenoid valve, 22-drain pipe, 23-drain valve, 24-eighth solenoid valve, 25-molding machine, 26-pressure pump.

[0018] 111 - first branch pipe, 112 - second branch pipe, 113 - third branch pipe, 114 - fourth branch pipe, 115 - filling connector. DETAILED DESCRIPTION

[0019] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0020] Reference Figure 1-2 As shown, an oxygen filling system includes a liquid oxygen storage tank 1, a cryogenic liquid oxygen pump 2, a first vaporizer 3, a second vaporizer 4, a buffer tank 10, a filling bus 11, a molding machine 25, and a pressure pump 26; the lower end of the liquid oxygen storage tank 1 is connected with a liquid inlet pipe 5 and a liquid outlet pipe 6; the end of the liquid inlet pipe 5 is connected with a liquid inlet joint 7; the liquid outlet pipe 6 is connected with the inlet end of the cryogenic liquid oxygen pump 2; the outlet end of the cryogenic liquid oxygen pump 2 is connected with a first pipeline 8; the first pipeline 8 is connected with the inlet end of the first vaporizer 3; the outlet end of the first vaporizer 3 is connected with a second pipeline 9; the outlet end of the second pipeline 9 is connected with the lower part of the buffer tank 10; the upper part of the buffer tank 10 is connected with the pressure pump 26 through a pipeline; the pressure pump 26 is connected with the molding machine 25 through a pipeline; the molding machine 25 is connected with several filling busbars 11; the first pipeline 8 is connected with a third pipeline 12; the second pipeline 9 is connected with a fourth pipeline 13; the second vaporizer 4 is connected between the third pipeline 12 and the fourth pipeline 13.

[0021] It should be noted that the liquid oxygen storage tank 1 is the main location for storing liquid oxygen, and the cryogenic liquid oxygen pump 2 can provide power for liquid oxygen transmission. The model of the cryogenic liquid oxygen pump 2 used in the present invention is QL30, and those skilled in the art can also make reasonable choices according to their needs; the first vaporizer 3 and the second vaporizer 4 adopt a backup and reserve form, which effectively ensures that during the filling operation, the liquid oxygen can be continuously vaporized, avoiding shutdown during the filling process to defrost the vaporizer; the filling bus 11 can fill the gas cylinder with oxygen; the buffer tank 10 can ensure sufficient supply of vaporized oxygen during refilling; the molding machine 25 can compress the oxygen and then transport it to the filling bus 11 through a pipeline to realize the filling of oxygen.

[0022] As another embodiment, it also includes a controller 14; a first solenoid valve 15 is connected to the liquid outlet pipe 6; a second solenoid valve 16 is connected between the cryogenic liquid oxygen pump 2 and the third pipeline 12; a third solenoid valve 17 is connected between the third pipeline 12 and the first vaporizer 3; a fourth solenoid valve 18 is connected to the third pipeline 12; a fifth solenoid valve 19 is connected between the first vaporizer 3 and the fourth pipeline 13; a sixth solenoid valve 21 is connected between the buffer tank 10 and the fourth pipeline 13; a seventh solenoid valve 20 is connected to the third pipeline 12; and the controller 14 is electrically connected to the first solenoid valve 15, the second solenoid valve 16, the third solenoid valve 17, the fourth solenoid valve 18, the fifth solenoid valve 19, the sixth solenoid valve 21, and the seventh solenoid valve 20, respectively. The controller 14 used in the present invention is a commercially available product. The controller 14 controls the opening and closing of each solenoid valve, which effectively improves the switching process between the first vaporizer 3 and the second vaporizer 4. When frosting occurs in the first vaporizer 3 and the working efficiency is reduced, the controller 14 closes the third solenoid valve 17 and the fifth solenoid valve 19 and opens the fourth solenoid valve 18 and the seventh solenoid valve 20, so that the vaporizer can be switched quickly, ensuring the continuity of the vaporization process and effectively improving the working efficiency.

[0023] Specifically, in order to effectively control the filling process, an eighth solenoid valve 24 is connected to the pipeline between the buffer tank 10 and the filling bus 11 ; the eighth solenoid valve 24 is electrically connected to the controller 14 .

[0024] Specifically, the filling busbar 11 includes a first branch pipe 111, a second branch pipe 112, a third branch pipe 113, and a fourth branch pipe 114. The first branch pipe 111 is symmetrically connected to two second branch pipes 112. The end of the second branch pipe 112 away from the first branch pipe 111 is symmetrically connected to two third branch pipes 113. Four fourth branch pipes 114 are evenly distributed on the third branch pipe 113. The end of the fourth branch pipe 114 away from the third branch pipe 113 is fixedly connected to a filling connector 115. There are 16 filling connectors 115, arranged in four rows and four columns. The individual branch pipes evenly distribute the airflow, ensuring a balanced amount of gas to be filled in each cylinder.

[0025] Specifically, in order to remove the waste liquid in the liquid inlet pipe 5 , the liquid inlet pipe 5 is connected to a sewage pipe 22 ; a sewage valve 23 is provided on the sewage pipe.

[0026] Specifically, the first vaporizer 3 and the second vaporizer 4 are air-temperature vaporizers or water-bath vaporizers. In this application, the water-bath vaporizer is used.

[0027] The working principle of this utility model:

[0028] Liquid oxygen enters the liquid oxygen storage tank 1 through the liquid inlet joint 7 for storage. When filling oxygen, the liquid oxygen is transported by the low-temperature liquid oxygen pump 2 and vaporized after passing through the first vaporizer 3. The vaporized oxygen enters the buffer tank 10 for storage to ensure sufficient supply of filling oxygen. The oxygen in the buffer tank 10 reaches the molding machine 25 through the pressure pump 26. The molding machine 25 can compress the oxygen and then transport it to the filling bus 11 through a pipeline to fill each gas cylinder. The air flow is evenly distributed through the branch pipes to ensure the balance of gas filling amount in each gas cylinder; the opening and closing of each solenoid valve is controlled by the controller 14 to effectively improve the switching process of the first vaporizer 3 and the second vaporizer 4. When the first vaporizer 3 is frosted and the working efficiency is reduced, the third solenoid valve 17 and the fifth solenoid valve 19 are closed by the controller 14, and the fourth solenoid valve 18 and the seventh solenoid valve 20 are opened, so that the vaporizer can be switched quickly to ensure the continuity of the vaporization process, which effectively improves the working efficiency.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. An oxygen filling system, characterized in that: The invention comprises a liquid oxygen storage tank (1), a cryogenic liquid oxygen pump (2), a first vaporizer (3), a second vaporizer (4), a buffer tank (10), a filling bus (11), a molding machine (25), and a pressure pump (26); the lower end of the liquid oxygen storage tank (1) is connected to a liquid inlet pipe (5) and a liquid outlet pipe (6); the port of the liquid inlet pipe (5) is connected to a liquid inlet joint (7); the liquid outlet pipe (6) is connected to the inlet end of the cryogenic liquid oxygen pump (2); the outlet end of the cryogenic liquid oxygen pump (2) is connected to a first pipeline (8); the first pipeline (8) is connected to the inlet end of the first vaporizer (3); the second vaporizer (4) is connected to the first pipeline (8); the first vaporizer (3 ... The outlet end of a vaporizer (3) is connected to a second pipe (9); the outlet end of the second pipe (9) is connected to the lower part of a buffer tank (10); the upper part of the buffer tank (10) is connected to a pressure pump (26) through a pipe; the pressure pump (26) is connected to a molding machine (25) through a pipe; the molding machine (25) is connected to a plurality of charging busbars (11); the first pipe (8) is connected to a third pipe (12); the second pipe (9) is connected to a fourth pipe (13); the second vaporizer (4) is connected between the third pipe (12) and the fourth pipe (13); The invention also includes a controller (14); a first solenoid valve (15) is connected to the liquid outlet pipe (6); a second solenoid valve (16) is connected between the cryogenic liquid oxygen pump (2) and the third pipeline (12); a third solenoid valve (17) is connected between the third pipeline (12) and the first vaporizer (3); a fourth solenoid valve (18) is connected to the third pipeline (12); a fifth solenoid valve (19) is connected between the first vaporizer (3) and the fourth pipeline (13); a sixth solenoid valve (21) is connected between the buffer tank (10) and the fourth pipeline (13); a seventh solenoid valve (20) is connected to the third pipeline (12); and the controller (14) is electrically connected to the first solenoid valve (15), the second solenoid valve (16), the third solenoid valve (17), the fourth solenoid valve (18), the fifth solenoid valve (19), the sixth solenoid valve (21), and the seventh solenoid valve (20), respectively.

2. The oxygen filling system according to claim 1, characterized in that: An eighth solenoid valve (24) is connected to the pipeline between the buffer tank (10) and the charging bus (11); the eighth solenoid valve (24) is electrically connected to the controller (14).

3. The oxygen filling system according to claim 1, characterized in that: The charging bus (11) comprises a first branch pipe (111), a second branch pipe (112), a third branch pipe (113), and a fourth branch pipe (114); the first branch pipe (111) is symmetrically connected to two second branch pipes (112); the second branch pipe (112) is symmetrically connected to two third branch pipes (113) at one end away from the first branch pipe (111); four fourth branch pipes (114) are evenly distributed on the third branch pipe (113); the fourth branch pipe (114) is fixedly connected to a charging connector (115) at one end away from the third branch pipe (113); the number of the charging connectors (115) is 16 and they are distributed in four rows and four columns.

4. The oxygen filling system according to claim 1, characterized in that: The liquid inlet pipe (5) is connected to a sewage discharge pipe (22); a sewage discharge valve (23) is provided on the sewage discharge pipe.

5. The oxygen filling system according to any one of claims 1 to 4, characterized in that: The first vaporizer (3) and the second vaporizer (4) are air-temperature vaporizers.

6. The oxygen filling system according to any one of claims 1 to 4, characterized in that: The first vaporizer (3) and the second vaporizer (4) are water bath type vaporizers.

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