Delivery device for special gases

Abstract

The utility model relates to special gas conveying technical field, specifically is a kind of special gas conveying device, including conveying pipe, both ends of conveying pipe are fixedly arranged with valve seat, and gas port is opened on the valve seat;The inner wall of the gas port is provided with a sliding slot, a baffle is sealingly and slidingly arranged in the sliding slot;Z-shaped air groove is opened in the baffle and penetrates its body, one-way valve is arranged in the Z-shaped air groove, and the gas outlet direction of two one-way valves is opposite;The top of the baffle is rotatably connected with threaded column, the outer wall of the top side of valve seat is fixedly provided with two supporting plates, the top side of the supporting plate is fixedly provided with top plate, and the threaded column is connected with the top plate by thread cooperation;By rotating the threaded column, threaded motion occurs between the threaded column and the top plate, so as to drive the baffle rotationally connected to sealingly slide in the sliding slot, ensure production safety and gas purity.

Description

Technical Field

[0001] This utility model relates to the field of special gas transportation technology, and more specifically, to a special gas transportation device. Background Technology

[0002] Special gas delivery systems are professional equipment used for the safe and precise delivery of corrosive, toxic, flammable, explosive, or gases requiring specific parameter control (such as medical oxygen, industrial specialty gases, and high-purity laboratory gases). They are widely used in medical, industrial, and laboratory settings and are key infrastructure for preventing dangerous accidents and ensuring process quality.

[0003] For example, Chinese Patent Publication No. CN202221640968.7 discloses a special pipeline for transporting special gases. The pipeline includes a main body with a transport groove inside. A corrosion-resistant structure is fixedly connected inside the main body, located within the transport groove. Connecting pipes are fixedly connected to the left and right ends of the main body. Each connecting pipe has a groove at its left and right ends, and several evenly distributed threaded pipes are fixedly connected within each groove. A protective structure is movably connected to the outer surface of the main body. By setting both the corrosion-resistant and protective structures, the corrosion resistance during the transport of special gases is improved, achieving dual corrosion resistance. The protective position of the pipeline is also adjustable. Manganese and chromium plates jointly increase the pressure resistance of the pipeline, preventing displacement or free movement during use.

[0004] However, in the above-mentioned technical solutions, during the process of dismantling old gas cylinders and installing new ones, some hazardous gases inevitably remain in the delivery pipeline. Existing devices lack targeted sealing and purging structures, and operators can only handle the residual gases by simply dismantling the pipeline to empty it or by natural diffusion. This is not only inefficient but also cannot completely remove the residues in the pipeline. If the residual gases are not effectively treated, they are very likely to cross-contaminate with the newly injected gas after replacing the cylinder. For scenarios with high purity requirements (such as high-purity silane gas in semiconductor manufacturing), cross-contamination will directly lead to a decrease in gas purity, which will cause problems such as product scrapping and experimental data deviation. For flammable, explosive, or toxic special gases, cross-contamination may trigger chemical reactions and even cause safety accidents such as explosions and poisoning. At the same time, some residual gases are directly emitted into the environment, which will also cause environmental pollution and resource waste. Utility Model Content

[0005] The main objective of this invention is to provide a special gas delivery device that effectively solves the problem in the prior art where, during the disassembly of old gas cylinders and the installation of new ones, some hazardous gases inevitably remain in the delivery pipeline. Existing devices lack targeted sealing and purging structures, and operators can only handle the residual gas by simply disassembling the pipeline to empty it or by natural diffusion. This is not only inefficient but also fails to completely remove the residue from the pipeline. If the residual gas is not effectively treated, it is very easy for it to cross-contaminate with the newly injected gas after replacing the cylinder. In scenarios requiring high purity (such as high-purity silane gas in semiconductor manufacturing), cross-contamination will directly lead to a decrease in gas purity, resulting in problems such as product scrapping and experimental data deviation. For flammable, explosive, or toxic special gases, cross-contamination may trigger chemical reactions and even cause safety accidents such as explosions and poisoning. At the same time, some residual gas is directly emitted into the environment, causing environmental pollution and resource waste.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a special gas conveying device includes a conveying pipe, both ends of which are fixedly provided with valve seats, and the valve seats are provided with gas ports; a groove is provided on the inner wall of the gas port, and a baffle is slidably disposed therein in a sealing fit with the groove; a Z-shaped gas groove penetrating the body is provided on the baffle, and a one-way valve is provided in the Z-shaped gas groove, with the two one-way valves having opposite gas outlet directions; a threaded column is rotatably connected to the top of the baffle, and two support plates are fixedly provided on one side of the outer wall of the top of the valve seat, and a top plate is fixedly provided on one side above the support plates, and the threaded column is connected to the top plate by a threaded fit; by rotating the threaded column to make it threaded with the top plate, the baffle rotatably connected thereto is driven to slide in a sealing fit within the groove.

[0007] Preferably, a handle is fixedly provided at the end of the threaded post away from the baffle.

[0008] Preferably, the delivery pipe is connected to the air inlet.

[0009] Preferably, the one-way valve includes a one-way valve base, an air inlet on the one-way valve base, an air outlet on one side of the air inlet, the radius of the air outlet being larger than the radius of the air inlet, a sealing plate being movably disposed inside the air outlet, a groove being disposed on the inner wall of one side of the air outlet, and a spring being fixedly installed in the groove.

[0010] Preferably, the radius of the sealing plate is larger than the radius of the air inlet.

[0011] Preferably, the spring is fixedly connected to the sealing plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) The operator rotates the handle to drive the threaded column to rotate so that the baffle slides downward to seal. When the baffle slides down to a specific position, its body completely seals the two ends of the conveying pipe. At the same time, the Z-shaped air groove inside it forms a purge channel with the inner cavity of the conveying pipe. Then, the cleaning gas is injected from the air port of one side valve seat. The gas overcomes the resistance of the one-way valve on that side and enters the inner cavity of the conveying pipe. The continuously injected cleaning gas squeezes the residual special gas and moves it to the air port on the other side. The residual gas pushes the one-way valve on the other side to open and is discharged to the special treatment device through the channel. After the purging is completed, the gas cylinder replacement operation can be safely carried out, thereby effectively preventing different gases from mixing and ensuring production safety and gas purity. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a special gas conveying device according to the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of a special gas conveying device according to the present invention;

[0016] Figure 3 This is a schematic diagram of the one-way valve in a special gas conveying device according to this utility model.

[0017] In the diagram: 1. Delivery pipe; 2. Valve seat; 3. Air port; 4. Slide groove; 5. Baffle; 6. Air groove; 7. Check valve; 701. Check valve base; 702. Air inlet; 703. Air outlet; 704. Sealing plate; 705. Groove; 706. Spring; 8. Threaded post; 9. Handle; 10. Support plate; 11. Top plate. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 1 and Figure 2As shown, a special gas conveying device includes a conveying pipe 1, with valve seats 2 fixedly installed at both ends of the conveying pipe 1. Each valve seat 2 has a gas port 3. A groove 4 is formed on the inner wall of each gas port 3, and a baffle 5 is slidably disposed within the groove 4 in a sealing fit. A Z-shaped gas groove 6 penetrating the baffle 5 is formed on the baffle 5, and a one-way valve 7 is installed within the Z-shaped gas groove 6, with the two one-way valves 7 having opposite gas outlet directions. A threaded column 8 is rotatably connected to the top of the baffle 5. Two support plates 10 are fixedly installed on one side of the outer wall of the top of the valve seat 2, and a top plate 11 is fixedly installed on one side above the support plates 10. The threaded column 8 is threadedly connected to the top plate 11. By rotating the threaded column 8 to cause threaded movement with the top plate 11, the baffle 5 rotatably connected to it is driven to slide in a sealing fit within the groove 4.

[0020] A handle 9 is fixedly provided at the end of the threaded post 8 away from the baffle 5.

[0021] like Figure 3 As shown, in another embodiment of the present invention, the one-way valve 7 includes a one-way valve base 701, an air inlet 702 is provided on the one-way valve base 701, an air outlet 703 is provided on one side of the air inlet 702, the radius of the air outlet 703 is larger than the radius of the air inlet 702, a sealing plate 704 is movably provided in the air outlet 703, a groove 705 is provided on the inner wall of one side of the air outlet 703, and a spring 706 is fixedly installed in the groove 705;

[0022] When gas moves from the inlet 702 to the outlet 703, the gas compresses the sealing plate 704, causing the sealing plate 704 to move away from the inlet 702. The spring 706 deforms, releasing the sealing plate 704 from the inlet 702, allowing the gas to pass through the inlet 702 and outlet 703 and be discharged to the designated location. Conversely, when gas moves from the outlet 703 to the inlet 702, the sealing plate 704 seals the inlet 702 to prevent backflow of gas.

[0023] The working principle of this special gas delivery device:

[0024] In use, the operator rotates the handle 9 to drive the threaded column 8 to rotate. Since the threaded column 8 is threadedly engaged with the top plate 11 and rotates to connect with the baffle 5, this rotational motion is converted into the baffle 5 sliding downwards in a straight line within the slide groove 4. When the baffle 5 slides down to a specific position, its body completely seals both ends of the conveying pipe 1. At the same time, the Z-shaped air groove 6 inside it forms a purge channel with the inner cavity of the conveying pipe 1. Then, the cleaning gas is injected from the air port 3 of one side valve seat. The gas overcomes the resistance of the one-way valve 7 on that side and enters the inner cavity of the conveying pipe 1. The continuously injected cleaning gas squeezes the residual special gas and moves it to the air port 3 on the other side. The residual gas pushes the one-way valve 7 on the other side to open and is discharged to the special treatment device through this channel. After the purging is completed, the gas cylinder replacement operation can be safely carried out, thereby effectively preventing different gases from mixing and ensuring production safety and gas purity.

[0025] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A special gas conveying device, comprising a conveying pipe (1), characterized in that: Both ends of the conveying pipe (1) are fixedly provided with valve seats (2), and air ports (3) are opened on the valve seats (2); the inner wall of the air port (3) is provided with a sliding groove (4), and a baffle (5) is slidably disposed in the sliding groove (4) in a sealing fit; the baffle (5) is provided with a Z-shaped air groove (6) that runs through its body, and a one-way valve (7) is provided in the Z-shaped air groove (6), and the two one-way valves (7) have opposite air outlet directions; a threaded column (8) is rotatably connected to the top of the baffle (5), and two support plates (10) are fixedly provided on the outer wall of one side of the top of the valve seat (2), and a top plate (11) is fixedly provided on one side above the support plate (10), and the threaded column (8) is connected to the top plate (11) by a threaded fit; by rotating the threaded column (8) to make it move threadedly with the top plate (11), the baffle (5) rotatably connected to it is driven to slide in the sliding groove (4) in a sealing fit.

2. The special gas conveying device according to claim 1, characterized in that: A handle (9) is fixedly provided at the end of the threaded post (8) away from the baffle (5).

3. The special gas conveying device according to claim 2, characterized in that: The delivery pipe (1) is connected to the air port (3).

4. A special gas conveying device according to claim 3, characterized in that: The one-way valve (7) includes a one-way valve base (701), an air inlet (702) is provided on the one-way valve base (701), an air outlet (703) is provided on one side of the air inlet (702), the radius of the air outlet (703) is larger than the radius of the air inlet (702), a sealing plate (704) is movably provided in the air outlet (703), a groove (705) is provided on the inner wall of one side of the air outlet (703), and a spring (706) is fixedly installed in the groove (705).

5. A special gas conveying device according to claim 4, characterized in that: The radius of the sealing plate (704) is larger than the radius of the air inlet (702).

6. A special gas conveying device according to claim 5, characterized in that: The spring (706) is fixedly connected to the sealing plate (704).

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