Centralized gas supply system for special gas

Abstract

The utility model discloses a centralized gas supply system for special gas, which belongs to the technical field of centralized gas supply systems and comprises a base and a gas storage tank, a protection mechanism for protecting the gas storage tank is mounted on the periphery of the base, and the gas storage tank is mounted on the base and positioned on the inner side of the protection mechanism. A connecting port of the gas storage tank communicates with a gas guide pipe through a connector, residual gas in a branch gas pipe connected with the replaced gas storage tank can be collected and cleaned through the arranged vacuum assembly, and therefore it is guaranteed that no redundant gas is left in the gas guide pipe, and the gas storage tank is safer to replace; according to the gas storage tank, the gas leakage is avoided, accidents caused by multiple gas leakage are avoided, the protection mechanism is installed around the gas storage tank, and a movable fence and a fixed fence in the protection mechanism are fixed through a positioning pin, so that the protection effect on the gas storage tank is enhanced, the gas storage tank is prevented from being collided by the outside, and meanwhile, a user can replace the gas storage tank conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of centralized gas supply systems, in particular to a centralized gas supply system for special gases. Background Art

[0002] The centralized gas supply system, also known as the central gas supply system, is a gas supply method that is increasingly being used by people. It is mainly composed of a gas source, a switching device, a pressure regulating device, a terminal gas point, and a monitoring and alarm device. In short, the centralized gas supply system transports the gas in the central gas storage equipment through a switching device and pressure regulation through a pipeline system to various dispersed terminal gas points. The decentralized cylinder gas supply method in factory workshops and laboratories in the past has become increasingly outdated and gradually abandoned.

[0003] In the centralized gas supply system, it is necessary to put a pipe on the gas outlet of the gas tank to transport the gas. Long-term use leads to a decrease in the amount of gas in the gas tank, so the gas tank needs to be replaced. However, during the replacement of the gas tank, gas will remain in the pipe connected to the gas tank, which will cause gas leakage in the connected pipe during the replacement process. If multiple gas tanks are replaced at the same time, and the gases in each gas tank are different, these special gases may easily mix in the air, which may cause more serious safety accidents. In addition, there is a lack of protective measures around the gas tank, which may easily cause the gas tank to be hit by the outside and tip over, which may easily cause the gas tank to leak and reduce the protective effect of the gas tank. Therefore, in order to solve the above-mentioned problems, we have proposed an improved centralized gas supply system for special gases. Utility Model Content

[0004] The purpose of the utility model is to provide a centralized gas supply system for special gases. The vacuum component set up can collect and clean the residual gas in the bronchus connected to the replaced gas tank, thereby ensuring that no excess gas remains in the air duct, making the replacement of the gas tank safer and avoiding accidents caused by multiple gas leaks. At the same time, the protective mechanism installed around the gas tank enhances the protection effect of the gas tank and prevents the gas tank from being hit by the outside world, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special gas centralized gas supply system, comprising a base and a gas tank, wherein the base is equipped with protective mechanisms for protecting the gas tank, the gas tank is installed on the base and located on the inner side of the protective mechanism, the connecting port of the gas tank is connected to an air duct through a connecting head, the other end of the air duct is connected to a first switch valve for controlling the gas flow in the gas tank, a plurality of the first switch valves are equipped with a bus, and the vacuum assembly installed on the base is connected to the lower surface of the air duct.

[0006] Preferably, a first pressure reducer is installed at a position of the busbar near the first switch valve, a second switch valve is provided at a bend of the busbar, and a second pressure reducer is installed on the busbar at an upper end position of the second switch valve.

[0007] Preferably, the protective mechanism includes a movable bar and a fixed bar, the two movable bars are hinged on two symmetrical sides of the base through hinges, and the two fixed bars are installed on the other two symmetrical sides of the base, and positioning holes are provided on the tops of the joints of the fixed bars and the movable bars, and positioning pins are inserted into the inner cavities of the positioning holes.

[0008] Preferably, the vacuum assembly includes a vacuum box, a vacuum pump is installed on the top of the vacuum box, the air inlet of the vacuum pump is connected to a multi-way pipe, the air inlet of the vacuum pump is connected to the vacuum box, multiple pipe openings of the multi-way pipe away from the vacuum pump are respectively connected to the air guide pipe, and a third switch valve is installed on the multi-way pipe.

[0009] Preferably, the gas storage tanks are provided in two groups, each group having three gas storage tanks, and a limiting seat is provided at the bottom of each gas storage tank, and the limiting seat is fixed on the base.

[0010] Preferably, a first flow detector is installed on the reflux bar between the second switch valve and the second pressure reducer, and a second flow detector is installed on the reflux bar located at the upper end of the second pressure reducer.

[0011] Preferably, the depth of the positioning hole formed on the fixed bar is greater than the depth of the positioning hole formed on the movable bar, the positioning pin is arranged in a curved shape, and the length of the curves at both ends of the positioning pin is set according to the depth of the positioning hole.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides a centralized gas supply system for special gases. The vacuum component can collect and clean the residual gas in the bronchus connected to the replaced gas tank, thereby ensuring that no excess gas remains in the airway, making the replacement of the gas tank safer and avoiding accidents caused by multiple gas leaks.

[0014] 2. The utility model provides a centralized gas supply system for special gases. A protective mechanism is installed around the gas tank. The movable fence and the fixed fence in the protective mechanism are fixed by positioning pins. This not only enhances the protection effect on the gas tank and prevents the gas tank from being hit by the outside world, but also makes it convenient for users to replace the gas tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the unfolded state of the protective mechanism structure of the utility model;

[0018] Figure 4 It is a partial cross-sectional schematic diagram of the base and protective mechanism structure of the utility model.

[0019] Numbers in the figure: 1. base; 2. gas storage tank; 3. protective mechanism; 31. movable fence; 32. fixed fence; 33. positioning hole; 34. positioning pin; 4. air guide tube; 5. first switch valve; 6. bus; 7. vacuum assembly; 71. vacuum box; 72. vacuum pump; 73. multi-way pipe; 74. third switch valve; 8. first pressure reducer; 9. second switch valve; 10. second pressure reducer; 11. limit seat; 12. first flow detector; 13. second flow detector. DETAILED DESCRIPTION

[0020] 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.

[0021] The utility model provides Figures 1 to 4 A special gas centralized gas supply system shown in the figure includes a base 1 and a gas storage tank 2. A protective mechanism 3 for protecting the gas storage tank 2 is installed around the base 1. The gas storage tank 2 is installed on the base 1 and is located on the inner side of the protective mechanism 3. The connecting port of the gas storage tank 2 is connected to an air duct 4 through a connecting head. The other end of the air duct 4 is connected to a first switch valve 5 for controlling the gas flow in the gas storage tank 2. A bus 6 is installed on multiple first switch valves 5. A vacuum component 7 installed on the base 1 is connected to the lower surface of the air duct 4. The protective mechanism 3 arranged around the gas storage tank 2 can provide a protective effect for the gas storage tank 2, so that the gas storage tank 2 will not be overturned due to external collision, and the vacuum component 7 installed on the air duct 4 can evacuate the residual gas in the air duct 4, thereby preventing the user from causing leakage of the residual gas in the air duct 4 when replacing the gas storage tank 2.

[0022] A first pressure reducer 8 is installed at a position of the bus 6 near the first switch valve 5, a second switch valve 9 is provided at the turning point of the bus 6, and a second pressure reducer 10 is installed on the bus 6 at the upper end of the second switch valve 9. The first pressure reducer 8 and the second pressure reducer 10 can regulate the gas pressure flowing in the bus 6 twice to achieve the required working pressure, thereby ensuring the output of a stable gas working pressure, so that the working pressure will not change due to changes in the high-pressure gas pressure in the gas storage tank 2.

[0023] The protective mechanism 3 includes a movable bar 31 and a fixed bar 32. The two movable bars 31 are hinged to two symmetrical sides of the base 1 through hinges, and the two fixed bars 32 are installed on the other two symmetrical sides of the base 1. Positioning holes 33 are provided on the tops of the joints between the fixed bars 32 and the movable bars 31. Positioning pins 34 are inserted into the inner cavities of the positioning holes 33. The movable bar 31 and the fixed bar 32 in the protective mechanism 3 are fixed by the positioning pins 34, which not only enhances the protection effect of the gas tank 2 and prevents the gas tank 2 from being hit by the outside, but also facilitates the user to replace the gas tank 2.

[0024] The vacuum assembly 7 includes a vacuum box 71, a vacuum pump 72 is installed on the top of the vacuum box 71, the air inlet of the vacuum pump 72 is connected to a multi-way pipe 73, the air inlet of the vacuum pump 72 is connected to the vacuum box 71, and multiple pipe openings of the multi-way pipe 73 away from the vacuum pump 72 are respectively connected to the air duct 4, and a third switch valve 74 is installed on the multi-way pipe 73, which can collect and clean the residual gas in the bronchus connected to the replaced gas storage tank 2, thereby ensuring that no excess gas will remain in the air duct 4, making it safer to replace the gas storage tank 2 and avoiding accidents caused by multiple gas leaks.

[0025] There are two groups of gas storage tanks 2, each group has three gas storage tanks 2, and a limiting seat 11 is provided at the bottom of each gas storage tank 2. The limiting seat 11 is fixed on the base 1, which reflects the centralized type of the gas storage tank 2, thereby facilitating the gas supply and transportation of multiple gases, and the limiting seat 11 provided at the bottom of the gas storage tank 2 enhances the stability of the gas storage tank 2.

[0026] A first flow detector 12 is installed on the reflux row between the second switch valve 9 and the second pressure reducer 10, and a second flow detector 13 is installed on the reflux row located at the upper end of the second pressure reducer 10. The designed first flow detector 12 can detect the first gas pressure adjustment, and the set second flow detector 13 can detect the second gas pressure adjustment, thereby ensuring the stability of gas transportation.

[0027] The depth of the positioning hole 33 opened on the fixed column 32 is greater than the depth of the positioning hole 33 opened on the movable column 31. The positioning pin 34 is arranged in a curved shape, and the length of the curve at both ends of the positioning pin 34 is set according to the depth of the positioning hole 33, so that the positioning pin 34 can move in the positioning hole 33.

[0028] When in use, each gas storage tank 2 is connected to the bus 6 through the air guide pipe 4, so that the gas in the gas storage tank 2 is centrally transported to the bus 6, and then the first pressure reducer 8 and the second pressure reducer 10 installed in the bus 6 can perform two gas pressure adjustments on the gas flowing in the bus 6 to achieve the required working pressure, thereby ensuring the output of a stable gas working pressure, so that the working pressure will not change due to the change of the high-pressure gas pressure in the gas storage tank 2, and after each gas pressure adjustment, the first flow detector 12 can be used to detect the first gas pressure. The adjustment of the secondary gas pressure is detected, and the second flow detector 13 is capable of detecting the adjustment of the secondary gas pressure, thereby ensuring the stability of gas transportation. If the gas tank 2 is used for a long time, it needs to be replaced. When replacing the gas tank 2, the valve on the gas tank 2 is closed, and then the first switch valve 5 on the bus 6 is closed, thereby starting the vacuum in the vacuum assembly 7 to evacuate the residual gas in the connected air duct 4 of the gas tank 2 through the multi-way pipe 73, thereby avoiding leakage of the residual gas inside when the gas tank 2 is separated from the air duct 4.

[0029] 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 centralized gas supply system for special gases, comprising a base (1) and a gas storage tank (2), characterized in that: The base (1) is provided with a protective mechanism (3) around its periphery for protecting the gas storage tank (2); the gas storage tank (2) is installed on the base (1) and is located inside the protective mechanism (3); the connection port of the gas storage tank (2) is connected to an air guide pipe (4) via a connector; the other end of the air guide pipe (4) is connected to a first switch valve (5) for controlling the gas flow in the gas storage tank (2); a plurality of the first switch valves (5) are provided with a bus bar (6); and a vacuum assembly (7) installed on the base (1) is connected to a lower surface of the air guide pipe (4).

2. A special gas centralized gas supply system according to claim 1, characterized in that: A first pressure reducer (8) is installed at a position of the busbar (6) close to the first switch valve (5), a second switch valve (9) is provided at a bend of the busbar (6), and a second pressure reducer (10) is installed on the busbar (6) at an upper end of the second switch valve (9).

3. A special gas centralized gas supply system according to claim 2, characterized in that: The protection mechanism (3) comprises a movable bar (31) and a fixed bar (32), wherein the two movable bars (31) are hinged to two symmetrical sides of the base (1) via hinges, and the two fixed bars (32) are mounted on the other two symmetrical sides of the base (1), and a positioning hole (33) is provided at the top of the joint between the fixed bar (32) and the movable bar (31), and a positioning pin (34) is inserted into the inner cavity of the positioning hole (33).

4. A special gas centralized gas supply system according to claim 3, characterized in that: The vacuum assembly (7) comprises a vacuum box (71), a vacuum pump (72) being mounted on the top of the vacuum box (71), an air inlet of the vacuum pump (72) being connected to a multi-way pipe (73), the air inlet of the vacuum pump (72) being connected to the vacuum box (71), a plurality of pipe openings of the multi-way pipe (73) being remote from the vacuum pump (72) being respectively connected to corresponding air guide pipes (4), and a third switch valve (74) being mounted on the multi-way pipe (73).

5. A special gas centralized gas supply system according to claim 1, characterized in that: The gas storage tanks (2) are provided in two groups, each group having three gas storage tanks (2), and a limit seat (11) is provided at the bottom of each gas storage tank (2), and the limit seat (11) is fixed on the base (1).

6. A special gas centralized gas supply system according to claim 2, characterized in that: A first flow detector (12) is installed on the reflux bar between the second switch valve (9) and the second pressure reducer (10), and a second flow detector (13) is installed on the reflux bar located at the upper end of the second pressure reducer (10).

7. A special gas centralized gas supply system according to claim 3, characterized in that: The depth of the positioning hole (33) formed on the fixed bar (32) is greater than the depth of the positioning hole (33) formed on the movable bar (31); the positioning pin (34) is arranged in a curved shape, and the length of the curve at both ends of the positioning pin (34) is set according to the depth of the positioning hole (33).

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