Ring cavity shielding gas online switching device based on multiple gas source channels

Abstract

The invention relates to the technical field of gas source switching, in particular to an annular cavity shielding gas online switching device based on multiple gas source channels, which comprises a first gas inlet storage tank and a second gas inlet storage tank, the first gas inlet storage tank and the second gas inlet storage tank are fixedly communicated with a first gas inlet pipe and a second gas inlet pipe respectively, and a gas outlet pipe is fixedly communicated between the first gas inlet storage tank and the second gas inlet storage tank. An annular cavity pipe is installed on the air outlet pipe, and a switching assembly is arranged between the first air inlet storage tank and the second air inlet storage tank; a pressure accumulation type double-air-inlet storage tank linkage switching assembly serves as a core, two independent air inlet storage tanks are used for conducting temporary storage type pressure accumulation on different protective gas, when the air amount of an air source is insufficient, air pressure difference is naturally formed between the two storage tanks, automatic triggering is conducted, the opening degree of two air inlet ball valves is adjusted firstly, air supply of a current channel is maintained, and air pressure difference force accumulation is conducted; and then the two groups of air outlet ball valves are driven to be quickly and reversely opened and closed, so that quick switching from the in-use air source channel to the standby air source channel is realized.

Description

Technical Field

[0001] This invention relates to the field of gas source switching technology, and in particular to an online switching device for annular cavity protective gas based on multiple gas source channels. Background Technology

[0002] The annular cavity of a gasifier is the space occupied by coal gas, slag, and reaction gases in the furnace environment. To ensure the normal operation of the gasification process and to prevent the reaction gases in the annular cavity from oxidizing or causing changes in the composition of the coal gas, which could lead to incomplete reaction or material loss in the gasifier, the annular cavity needs to be filled with a protective gas. This gas is called the annular cavity protective gas.

[0003] However, the current mainstream annular protective gas supply system relies on a single gas source and pipeline without any backup plan. Once there is insufficient gas supply, pipeline component failure, or maintenance of pipelines and storage tanks, the protective gas supply will be directly cut off. The interruption of protective gas will quickly disrupt the atmosphere balance inside the gasifier, causing a chain reaction of problems such as abnormal gas composition and oxidation of reactant gases, ultimately forcing the gasifier to shut down and seriously affecting the continuity of production.

[0004] To address the aforementioned technical shortcomings, a solution is proposed: a dual-intake air tank linkage switching component that uses pressure storage. When the available air source is insufficient, the pressure difference between the two sets of air tanks triggers automatic switching of the air supply channel, avoiding reliance on a single air source, which could lead to a direct interruption of the protective air supply if the air supply is insufficient. Summary of the Invention

[0005] The purpose of this invention is to provide an online switching device for protective gas in an annular cavity based on multiple gas source channels, in order to solve the aforementioned technical defects. The core of the device is a pressure-accumulating dual-inlet gas storage tank linkage switching component: two independent gas inlet tanks are used to temporarily store and accumulate different protective gases. When the gas supply is insufficient, a pressure difference is naturally formed between the two tanks, which automatically triggers the linkage of the piston block, support rod, push frame and other structures. First, the opening of the two inlet balloon valves is adjusted and the gas supply of the current channel is maintained to accumulate pressure difference. Then, the two outlet balloon valves are driven to open and close rapidly in the opposite direction, realizing the rapid switching of the gas source channel to the backup gas source channel. At the same time, the outlet channel of the corresponding inlet tank is closed to store pressure for backup, thus achieving the effect of automatic reverse switching of gas source.

[0006] The objective of this invention can be achieved through the following technical solution: an online switching device for annular protective gas based on multiple gas source channels, comprising an air inlet tank 1 and an air inlet tank 2, wherein an air inlet pipe 1 and an air inlet pipe 2 are respectively fixedly connected to the air inlet tank 1 and the air inlet tank 2, and an air outlet pipe is fixedly connected between the air inlet tank 1 and the air outlet pipe, and an annular tube is installed on the air outlet pipe; a switching component for different gas sources to enter the annular tube is provided between the air inlet tank 1 and the air inlet tank 2.

[0007] Preferably, an intake shut-off valve, an intake balloon valve, and an intake check valve are fixedly installed on both intake pipe one and intake pipe two. An outlet balloon valve, a regulating valve, and an outlet check valve are fixedly installed on both sides of the outlet pipe located in the annular cavity. A pressure gauge is installed on both intake storage tank one and intake storage tank two.

[0008] Preferably, the switching assembly includes an air intake linkage arm fixedly connected to the valve stem of the air intake valve and an air outlet linkage arm fixedly connected to the valve stem of the air outlet valve. A pusher frame one and a pusher frame two are respectively provided between the two sets of air intake valves and the two sets of air outlet valves.

[0009] Preferably, both the first and second pusher frames are fixedly connected to pins at their ends, and both the air intake linkage arm and the air exhaust linkage arm have slots that are slidably connected to the corresponding pins. The length of the air intake linkage arm is greater than the length of the air exhaust linkage arm.

[0010] Preferably, pressure cylinders are fixedly connected to the opposite sides of the first and second air intake tanks. Piston block 1 and piston block 2 are slidably connected inside the two sets of pressure cylinders, and a support rod is fixedly connected between piston block 1 and piston block 2. The support rod is fixedly connected to the push frame 1 through a connecting block. A spring 1 is fixedly connected between piston block 1 and piston block 2 and the corresponding pressure cylinder.

[0011] Preferably, the push frame 2 is fixedly connected to a U-shaped seat that is slidably connected to the support rod, and the connecting block is located inside the U-shaped seat.

[0012] Preferably, a support plate is fixedly connected to the pressure cylinder, and a square rod that is slidably connected to the U-shaped seat is fixedly connected between the support plates. A locking block that is slidably connected to the square rod is installed on the square rod through a spring. The U-shaped seat has symmetrically opened slots on both sides that are adapted to the locking blocks.

[0013] The beneficial effects of this invention are as follows:

[0014] (1) This invention uses two sets of air inlet storage tanks to temporarily store and pressurize different protective gases, providing a basis for stable gas supply. When the gas supply is insufficient, a pressure difference is formed between the two sets of air inlet storage tanks, driving the piston block to move with the support rod: first, the opening degree of the two sets of air inlet valves is adjusted, while the current gas supply channel is maintained to ensure continuous gas supply, which further increases the pressure difference. Then, the two sets of air outlet valves are opened and closed in opposite directions, thereby completing the automatic switching of the gas supply channel. Through the alternating use of multiple gas source channels, the uninterrupted switching of different protective gases is achieved, effectively ensuring the continuous and stable operation of the gasifier.

[0015] (2) The present invention also establishes a step-by-step linkage mechanism by means of the locking structure of the locking block on the square rod and the locking groove on the U-shaped seat: first, the opening of the inlet balloon valve is adjusted to store the pressure difference, and then the locking groove is used to briefly limit the push frame one to form a larger pressure difference between the two sets of inlet storage tanks. When the pressure accumulates to the threshold, the locking block separates from the locking groove, and the instantaneously released thrust acts on the push frame two to drive the two sets of outlet balloon valves to open and close in reverse quickly. This not only realizes the rapid switching of different air sources, but also simultaneously closes the outlet channel of the corresponding inlet storage tank to store pressure for later use, achieving the effect of automatic reverse switching of air sources. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings;

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the connection between the air intake tank and the corresponding pipeline of the present invention;

[0019] Figure 3 This is a schematic diagram of the switching component of the present invention;

[0020] Figure 4 This is a schematic diagram of the cooperation between the support rod and the push frame of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the second pusher frame of the present invention;

[0022] Figure 6 This is a schematic diagram of the U-shaped base of the present invention.

[0023] Legend:

[0024] 1. Inlet tank one; 11. Inlet tank two; 12. Inlet pipe one; 13. Inlet pipe two; 14. Outlet pipe; 15. Annular tube; 16. Inlet shut-off valve; 17. Inlet balloon valve; 18. Inlet check valve; 19. Outlet balloon valve; 110. Regulating valve; 111. Outlet check valve;

[0025] 2. Switching components; 21. Intake linkage arm; 22. Exhaust linkage arm; 23. Push frame one; 24. Push frame two; 25. Pressure cylinder; 26. Piston block one; 27. Piston block two; 28. Support rod; 29. ​​Connecting block; 210. Spring one; 211. U-shaped seat; 212. Support plate; 213. Square rod; 214. Spring two; 215. Locking block; 216. Locking groove. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1: Please refer to Figures 1-5 As shown, the current annular protective gas supply system relies on a single gas source and pipeline. If there is insufficient gas supply, pipeline component failure, or maintenance of pipelines or storage tanks, the protective gas supply will be directly interrupted. The following solutions can be used to address this problem.

[0028] The online switching device for annular protective gas based on multiple gas source channels in this embodiment includes an air inlet storage tank 1 and an air inlet storage tank 2 11. The two sets of air inlet storage tanks are used to temporarily store and store different protective gases during the gas supply process, providing a basis for stable gas supply. An air inlet pipe 12 and an air inlet pipe 2 13 are fixedly connected to the air inlet storage tank 1 and the air inlet storage tank 2 11, respectively.

[0029] The free end of the first intake pipe 12 is connected to the first gas source and is used to inject nitrogen into the annular cavity for protection. The free end of the second intake pipe 13 is connected to the second gas source and is used to inject carbon dioxide into the annular cavity for protection. An outlet pipe 14 is fixedly connected between the first intake tank 1 and the second intake tank 11, and an annular cavity pipe 15 is installed on the outlet pipe 14. A switching component 2 for different gas sources to enter the annular cavity pipe 15 is provided between the first intake tank 1 and the second intake tank 11.

[0030] Inlet shut-off valve 16, inlet balloon valve 17, and inlet check valve 18 are fixedly installed on both inlet pipe 12 and inlet pipe 13. Outlet balloon valve 19, regulating valve 110, and outlet check valve 111 are fixedly installed on both sides of outlet pipe 14 and annular tube 15. Gas source 1 is injected into inlet storage tank 1 for pressurization through inlet pipe 12 and the corresponding inlet shut-off valve 16, inlet balloon valve 17, and inlet check valve 18 on the pipeline. Then, nitrogen is injected into annular tube 15 through outlet pipe 14 on one side of annular tube 15 and the corresponding outlet balloon valve 19, regulating valve 110, and outlet check valve 111. Nitrogen then enters the annular cavity of the gasifier to act as protective gas.

[0031] Conversely, gas source two injects carbon dioxide into the gasifier annular cavity through gas inlet pipe two 13, gas inlet storage tank two 11, part of the gas outlet pipe 14 and corresponding valves to act as protective gas. Gas inlet storage tank one 1 and gas inlet storage tank two 11 are both equipped with pressure gauges. After the protective gas enters the corresponding gas inlet storage tank, the pressure value is displayed by the pressure gauge. When the standby gas inlet storage tank is pressurized for standby, the pressure value is observed by the pressure gauge to be close to and not exceed the set pressure value.

[0032] The switching component 2 includes an air intake linkage arm 21 fixedly connected to the valve stem of the air intake valve 17, and an air outlet linkage arm 22 fixedly connected to the valve stem of the air outlet valve 19. A push frame 1 23 and a push frame 24 are respectively provided between the two sets of air intake valves 17 and the two sets of air outlet valves 19. When the push frame 1 23 moves, one set of air intake valves 17 increases its opening degree and the other set decreases its opening degree. When the push frame 24 moves, one set of air outlet valves 19 opens and the other closes.

[0033] Both the ends of the first pusher 23 and the second pusher 24 are fixedly connected with pins. The air inlet linkage arm 21 and the air outlet linkage arm 22 are provided with slots that slide to connect with the corresponding pins. The length of the air inlet linkage arm 21 is greater than the length of the air outlet linkage arm 22, ensuring that the second pusher 24 with a small stroke can close the air outlet valve 19. The movement stroke of the first pusher 23 is insufficient to completely close the air inlet valve 17, so as to inject air into the corresponding air inlet tank for pressurization. By closing the corresponding air inlet shut-off valve 16, the injection of air into the pipeline is stopped, and the maintenance of the pipeline, tank and valve is realized.

[0034] Pressure cylinders 25 are fixedly connected to the opposite sides of air inlet tank 1 and air inlet tank 2. Piston block 1 26 and piston block 27 are slidably connected inside the two sets of pressure cylinders 25 respectively, and a support rod 28 is fixedly connected between piston block 1 26 and piston block 27. The support rod 28 is fixedly connected to the push frame 1 23 through the connecting block 29. Spring 1 210 is fixedly connected between piston block 1 26 and piston block 27 and the corresponding pressure cylinder 25.

[0035] When the amount of nitrogen in the gas source is insufficient, the gas pressure in the gas inlet storage tank 1 drops until it is lower than the gas pressure in the gas inlet storage tank 21. The atmospheric pressure in the gas inlet storage tank 21 and the low gas pressure in the gas inlet storage tank 1 push the piston block 27 to move and compress the corresponding spring 210. Combined with the support rod 28, the piston block 26 pulls the corresponding spring 210. The support rod 28 carries the push frame 23 to move synchronously through the connecting block 29.

[0036] By sliding the pin on the push frame 23 and the slot on the air intake linkage arm 21, the opening amount of the air intake valve 17 on the air intake pipe 12 decreases, while the opening amount of the air intake valve 17 on the air intake pipe 2 increases. During this process, the air outlet valve 19 connected to the air intake tank 1 remains open, while the air outlet valve 19 connected to the air intake tank 2 remains closed. This causes the air pressure in the air intake tank 1 to drop rapidly, and opens the air intake shut-off valve 16 on the air intake pipe 2, allowing carbon dioxide from the air source 2 to enter the air intake tank 2, causing the air pressure to rise rapidly.

[0037] A U-shaped seat 211 that is slidably connected to the support rod 28 is fixedly connected to the second pusher 24. The connecting block 29 is located inside the U-shaped seat 211. When the connecting block 29 moves, it abuts against the inner wall of the other side of the U-shaped seat 211, which drives the second pusher 24 to move. In conjunction with the sliding of the pin on the second pusher 24 and the slot on the air outlet linkage arm 22, the air outlet valve 19 connected to the first air inlet tank 1 is closed, and the air outlet valve 19 connected to the second air inlet tank 11 is opened, so that carbon dioxide replaces nitrogen and is injected into the annular cavity as a protective gas without stopping the gas flow.

[0038] Example 2: Please refer to Figures 3-6 As shown, the problem of large fluctuations in outlet air pressure caused by the difficulty in quickly opening and closing the two sets of outlet air valves when switching air source channels can be solved by the following solution;

[0039] In this embodiment, a support plate 212 is fixedly connected to the pressure cylinder 25, and a square rod 213 that is slidably connected to the U-shaped seat 211 is fixedly connected between the support plates 212. A locking block 215 that is slidably connected to the square rod 213 is installed on it through a spring 214. The U-shaped seat 211 has symmetrical slots 216 that are adapted to the locking block 215 on both sides. When the connecting block 29 abuts against the inner wall of the other side of the U-shaped seat 211, the locking block 215 is engaged with the corresponding slot 216, which temporarily restricts the movement of the push frame 23, causing the pressure difference between the air pressure in the second air tank 11 and the air pressure in the first air tank 1 to further increase, thereby realizing pressure difference power storage.

[0040] When the pressure accumulates to the threshold, the force of the air pressure in the second air tank 11 pushing the piston block 27 is sufficient to cause the locking block 215 to separate from the corresponding locking groove 216. The instantaneously released thrust acts on the second pusher 24. While the first pusher 23 continues to move rapidly, it simultaneously drives the second pusher 24 to move rapidly, thereby driving the two sets of outlet air valves 19 to open and close rapidly in opposite directions. This achieves rapid switching between different air sources while simultaneously closing the outlet channel of the corresponding air tank to store pressure for later use, thus achieving the effect of automatic reverse switching of air sources.

[0041] Example 3: Please refer to Figures 1-6 As shown, the present invention also proposes a method for using an online switching device for annular cavity protective gas based on multiple gas source channels, including the following steps:

[0042] Step 1: Nitrogen gas is injected into the annular tube 15 through the gas source 1 via the gas inlet pipe 12, gas inlet storage tank 1, gas outlet pipe 14 and the corresponding gas inlet shut-off valve 16, gas inlet balloon valve 17, gas inlet check valve 18, gas outlet balloon valve 19, regulating valve 110 and gas outlet check valve 111. During the process of gas source 1 injecting gas into the annular tube 15 with sufficient nitrogen, the gas pressure in gas inlet storage tank 11 is greater than the gas pressure in gas inlet storage tank 21, which pushes piston block 26 to compress the corresponding spring 210. At the same time, the gas inlet balloon valve 17 connected to gas inlet storage tank 11 opens to the maximum and the gas outlet balloon valve 19 opens. The gas inlet balloon valve 17 connected to gas inlet storage tank 21 opens to the minimum and the gas outlet balloon valve 19 closes.

[0043] Step 2: When the nitrogen supply in gas source 1 is insufficient, the pressure in gas in inlet tank 1 decreases until it falls below the pressure in inlet tank 21. The difference between the atmospheric pressure in inlet tank 21 and the low pressure in inlet tank 1 causes piston block 27 to move and compress the corresponding spring 210. This, combined with support rod 28, causes piston block 26 to stretch the corresponding spring 210. Support rod 28, through connecting block 29, synchronously moves push frame 23, engaging with the pin on push frame 23 and the slot on inlet linkage arm 21. The sliding of the air causes the opening amount of the air inlet valve 17 on the first air inlet pipe 12 to decrease, while the opening amount of the air inlet valve 17 on the second air inlet pipe 13 to increase. During this process, the air outlet valve 19 connected to the first air inlet tank 1 remains open, while the air outlet valve 19 connected to the second air inlet tank 11 remains closed. This causes the air pressure in the first air inlet tank 1 to drop rapidly, and opens the air inlet shut-off valve 16 on the second air inlet pipe 13. Carbon dioxide from the second air source enters the second air inlet tank 11, causing the air pressure to rise rapidly.

[0044] Step 3: When the connecting block 29 abuts against the inner wall of the other side of the U-shaped seat 211, the engagement of the locking block 215 with the corresponding slot 216 temporarily restricts the movement of the push frame 23, causing the pressure difference between the air in the second air inlet tank 11 and the first air inlet tank 1 to further increase, until the force of the air pressure in the second air inlet tank 11 pushing the piston block 27 is sufficient to cause the locking block 215 to separate from the corresponding slot 216, thereby pushing the push frame 23 to continue to move rapidly, engaging the connecting block 29. The contact with the other side of the U-shaped seat 211 simultaneously drives the push frame 24 to move quickly. In conjunction with the sliding of the pin on the push frame 24 and the slot on the air outlet linkage arm 22, the air outlet valve 19 connected to the air inlet tank 1 is quickly closed, and the air outlet valve 19 connected to the air inlet tank 21 is quickly opened. At this time, the locking block 215 automatically engages with another locking slot 216, and in conjunction with the air outlet check valve 111, carbon dioxide replaces nitrogen and is injected into the annular cavity as a protective gas without stopping the gas flow.

[0045] Step 4: Close the intake shut-off valve 16 on intake pipe 12, perform maintenance and repair on gas source 1, and then open the intake shut-off valve 16 on intake pipe 12 to allow nitrogen to enter the intake storage tank 1 and increase the pressure. Use the pressure gauge until the pressure value is close to and does not exceed the set pressure value, and then close the intake shut-off valve 16 on intake pipe 12. This will automatically switch to gas source 1 and use nitrogen as a protective gas when gas source 2 is insufficient.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An online switching device for annular protective gas based on multiple gas source channels, comprising an inlet storage tank one (1) and an inlet storage tank two (11), characterized in that, The first air intake tank (1) and the second air intake tank (11) are respectively fixedly connected to the first air intake pipe (12) and the second air intake pipe (13). The first air intake tank (1) and the second air intake tank (11) are fixedly connected to the outlet pipe (14), and the outlet pipe (14) is equipped with an annular cavity pipe (15). A switching component (2) for different air sources to enter the annular cavity pipe (15) is provided between the first air intake tank (1) and the second air intake tank (11).

2. The online switching device for annular cavity protective gas based on multiple gas source channels according to claim 1, characterized in that, An air intake shut-off valve (16), an air intake ball valve (17), and an air intake check valve (18) are fixedly installed on both the first air intake pipe (12) and the second air intake pipe (13). An air outlet ball valve (19), a regulating valve (110), and an air outlet check valve (111) are fixedly installed on both sides of the air outlet pipe (14) and the annular cavity pipe (15). A pressure gauge is installed on both the first air intake tank (1) and the second air intake tank (11).

3. The online switching device for annular cavity protective gas based on multiple gas source channels according to claim 2, characterized in that, The switching assembly (2) includes an air intake linkage arm (21) fixedly connected to the valve stem of the air intake valve (17) and an air outlet linkage arm (22) fixedly connected to the valve stem of the air outlet valve (19). A pusher frame one (23) and a pusher frame two (24) are respectively provided between the two sets of air intake valves (17) and the two sets of air outlet valves (19).

4. The online switching device for annular cavity protective gas based on multiple gas source channels according to claim 3, characterized in that, The ends of the first pusher (23) and the second pusher (24) are fixedly connected with pins. The air intake linkage arm (21) and the air exhaust linkage arm (22) are provided with slots that are slidably connected to the corresponding pins. The length of the air intake linkage arm (21) is greater than the length of the air exhaust linkage arm (22).

5. The online switching device for annular cavity protective gas based on multiple gas source channels according to claim 3, characterized in that, Pressure cylinders (25) are fixedly connected to the opposite sides of the first air intake tank (1) and the second air intake tank (11). Piston block 1 (26) and piston block 2 (27) are slidably connected inside the two sets of pressure cylinders (25). A support rod (28) is fixedly connected between piston block 1 (26) and piston block 2 (27). The support rod (28) is fixedly connected to the push frame 1 (23) through the connecting block (29). Spring 1 (210) is fixedly connected between piston block 1 (26) and piston block 2 (27) and the corresponding pressure cylinder (25).

6. The online switching device for annular cavity protective gas based on multiple gas source channels according to claim 5, characterized in that, The push frame 2 (24) is fixedly connected to a U-shaped seat (211) that is slidably connected to the support rod (28), and the connecting block (29) is located inside the U-shaped seat (211).

7. The online switching device for annular cavity protective gas based on multiple gas source channels according to claim 6, characterized in that, A support plate (212) is fixedly connected to the pressure cylinder (25). A square rod (213) that is slidably connected to the U-shaped seat (211) is fixedly connected between the support plates (212). A locking block (215) that is slidably connected to the square rod (213) is installed on it through a spring (214). The U-shaped seat (211) has symmetrically opened slots (216) on both sides that are adapted to the locking block (215).

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