Distributor based on flow control to prevent gas backflow corrosion

Abstract

This invention relates to a distributor based on diversion control to prevent gas backflow corrosion, comprising a distribution box and a display mounted on the distribution box. A first air inlet pipe is installed on one side of the distribution box, and a second air inlet pipe is installed on the other side. A plurality of first tee quick-connect fittings are installed on one side of the first air inlet pipe, and these fittings are interconnected. A plurality of compression tee fittings are installed on one side of each first tee quick-connect fitting. By fixing an upper cover plate and a lower cover plate, when leakage occurs at the connection points between valves and pipes, gas directly enters the cavity between the upper and lower cover plates. When the gas level in the cavity reaches a certain quantity, gas enters the detection block from the connecting pipe opening, pushing an adjusting rod inside the connecting pipe to move. The adjusting rod moves towards the compression spring. When the battery on the adjusting rod moves to the alarm position, the positive and negative terminals of the battery energize the alarm, triggering an alarm and transmitting information to the display for real-time monitoring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dispensers, in particular to a dispenser based on shunt control to prevent gas backflow corrosion. BACKGROUND

[0002] At present, the market of the detection industry mainly uses the gas dispenser produced by the American cortest company. The dispenser uses a needle valve to control the gas flow, and a tee to switch the gas type. The needle valve used is a custom-made 316L material needle valve, and the needle valve and tee are connected by a nylon pipe. Each dispenser is equipped with 2 gas inlets and 6 gas outlets, which can realize the control of different flow rates of two different gases at the same time.

[0003] In Chinese patent application 201821715496.0, a gas dispenser is disclosed, which comprises a body and a first adjusting cam, the first adjusting cam being rotatably installed on the body, the body being provided with a first interface and a first channel structure, the body being provided with a cavity inside, the inner wall of the first channel structure being provided with a second interface, the first interface and the second interface being communicated with the cavity, the second interface being adapted to connect a first connecting pipe, a first opening being provided on one side wall of the first channel structure, the first adjusting cam having a cam profile adapted to extrude the first connecting pipe, and the extrusion degree of the first adjusting cam on the first connecting pipe being adjusted by rotating the first adjusting cam. The gas dispenser can be installed at any position on the oxygen supply pipeline or the atomization pipeline, and the user can adjust the flow rate in the pipeline through the gas dispenser without moving to the position where the valve is located when the flow rate needs to be adjusted.

[0004] The dispenser in the prior art is usually made of stainless steel, and the needle valve will leak gas and lose the function of controlling the gas flow after long-term contact with corrosive gases such as H2S / CO2 / O2, etc. Because the gas used in the dispenser is toxic and harmful, once leakage occurs, the consequences are unpredictable, therefore, real-time air tightness detection of the needle valve and the connection between the valve and the pipeline needs to be carried out, and risk treatment needs to be done. SUMMARY

[0005] The purpose of the present application is to provide a dispenser based on shunt control to prevent gas backflow corrosion.

[0006] In order to solve the above technical problems, the present application provides a dispenser based on shunt control to prevent gas backflow corrosion, which comprises a distribution box and a display installed on the distribution box,

[0007] The first air inlet pipe is provided with a plurality of first three-way quick couplings on one side, the plurality of first three-way quick couplings are connected to each other, the first three-way quick couplings are provided with a plurality of sleeve three-ways on one side, the sleeve three-ways are provided with a plurality of needle valves on one side, the second air inlet pipe is provided with a plurality of second three-way quick couplings on one side, the plurality of second three-way quick couplings are connected to each other, the second three-way quick couplings are connected to the sleeve three-ways, and the first three-way quick couplings, the second three-way quick couplings, the sleeve three-ways and the needle valves are all provided with detection parts, wherein the detection parts are used for detecting the air tightness of the first air inlet pipe and the second air inlet pipe in real time.

[0008] Further, the detection parts include an upper cover plate, a lower cover plate and a detection box, the upper cover plate and the lower cover plate are spliced to form a sealed cavity inside, and the first three-way quick couplings, the second three-way quick couplings, the sleeve three-ways and the needle valves are wrapped.

[0009] Further, a ring groove is formed on the pipeline at the connection position of the first three-way quick couplings, the second three-way quick couplings, the sleeve three-ways and the needle valves, a clamping groove is formed on the upper cover plate and the lower cover plate, the clamping groove is in a semicircular arc shape, and the clamping groove is arranged in the ring groove.

[0010] Further, the detection box is composed of an upper box body fixed to one side of the upper cover plate and a lower box body fixed to the lower cover plate, a detection block is arranged in the lower box body, an air outlet hole is formed in the detection block, a connecting pipe is formed in the detection block, an inlet of the connecting pipe is in communication with the inside of the lower cover plate, an adjusting rod is arranged in the connecting pipe, a gas guide pipe is formed at one end of the adjusting rod, and the gas guide pipe is in an L shape.

[0011] When the upper cover plate and the lower cover plate are filled with gas, the gas enters the connecting pipe and pushes the adjusting rod to move to one side, so that the connecting pipe, the gas guide pipe and the air outlet hole are in communication.

[0012] Further, a hydraulic cylinder is arranged at the other end of the connecting pipe, a spring is arranged on one side of the hydraulic cylinder, and the other side of the spring is fixed to the end of the adjusting rod.

[0013] Further, a storage battery is arranged on the adjusting rod, and an alarm is arranged on the detection block, wherein when the gas pushes the adjusting rod to move to the direction of the compression spring, the storage battery is connected to the alarm and is electrified.

[0014] Further, the lower box body is internally provided with air pumps, the air outlet end of the air pump is located outside the lower box body, the air inlet end is located inside the box body, the air outlet ends of multiple air pumps are connected with each other through pipelines and extend to the outside of the box body.

[0015] Further, the connecting positions of the upper cover plate, the lower cover plate, the upper box body and the lower box body are all provided with sealing rings.

[0016] Further, the sleeve three-way switch is installed on the top of the distribution box, and the needle valve switch is installed on the side wall of the distribution box.

[0017] The beneficial effects of the present application are that, when the valve and the pipeline connection position leaks, the gas directly enters the cavity in the upper cover plate and the lower cover plate, when the gas in the cavity reaches a certain amount, the gas enters the detection block from the connecting pipe, and the adjusting rod in the connecting pipe is pushed to move, the adjusting rod moves towards the compression spring, when the battery on the adjusting rod moves to the alarm position, the battery positive and negative electrodes power on the alarm, and the information is transmitted to the display for real-time monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application is further described below in conjunction with the drawings and examples.

[0019] Figure 1 is a perspective view of the present application;

[0020] Figure 2 is a perspective view of the detection part of the present application;

[0021] Figure 3 is a sectional view of the upper cover plate and the upper box body of the present application;

[0022] Figure 4 is a perspective view of the lower cover plate of the present application;

[0023] Figure 5 is a front view of the first three-way quick connector or the second three-way quick connector of the present application;

[0024] Figure 6 is a perspective view of the present application Figure 3 is a local enlarged structure schematic view of A in the present application;

[0025] Figure 7 is a gas circuit diagram of the distributor based on shunt control to prevent gas backflow corrosion of the present application.

[0026] In the drawings:

[0027] 1. Distribution box; 11. Display; 2. First air inlet pipe; 3. Second air inlet pipe; 4. First tee quick-connect fitting; 5. Compression fitting tee; 6. Needle valve; 7. Second tee quick-connect fitting; 8. Detection section; 81. Upper cover plate; 811. Detection block; 812. Air outlet; 813. Connecting pipe; 814. Adjusting rod; 815. Air guide pipe; 816. Hydraulic cylinder; 817. Spring; 818. Battery; 819. Alarm; 8110. Air pump; 82. Lower cover plate; 83. Detection box; 84. Ring groove; 85. Slot; 86. Sealing ring; 87. Upper housing; 88. Lower housing. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0029] like Figures 1-7 As shown, the distributor based on diversion control to prevent gas backflow corrosion of the present invention includes a distribution box 1 and a display 11 installed on the distribution box 1. A first air inlet pipe 2 is installed on one side of the distribution box 1, and a second air inlet pipe 3 is installed on the other side of the distribution box 1. A plurality of first tee quick-connect fittings 4 are installed on one side of the first air inlet pipe 2, and the plurality of first tee quick-connect fittings 4 are interconnected. A plurality of clamping tee fittings 5 ​​are installed on one side of the first tee quick-connect fittings 4, and a plurality of needle valves 6 are installed on one side of the clamping tee fittings 5. A plurality of second tee quick-connect fittings 7 are installed on one side of the second air inlet pipe 3, and the plurality of second tee quick-connect fittings 7 are interconnected. The second tee quick-connect fittings 7 are connected to the clamping tee fittings 5. A detection unit 8 is installed on the first tee quick-connect fittings 4, the second tee quick-connect fittings 7, the clamping tee fittings 5, and the needle valves 6, wherein the detection unit 8 is used to detect the airtightness of the first air inlet pipe 2 and the second air inlet pipe 3 in real time.

[0030] Compression Fitting Tee 5: Enables switching between two gases; made of PTFE, PTFE is virtually unaffected by chemicals and can withstand the effects of all strong acids (including aqua regia), strong oxidizing agents, reducing agents, and various organic solvents, except for molten alkali metals, Iberstein bases, fluorinated media, and sodium hydroxide above 300°C. This protects parts from any type of chemical corrosion. Using the PTFE compression fitting tee 5 effectively prevents damage to the tee from corrosive gases.

[0031] Needle valve 6: Regulates the flow rate of the incoming gas. Conventional distributors use 316L stainless steel needle valves 6, which have a high failure rate, mostly due to localized corrosion on the sealing surface, leading to poor sealing or even complete failure to seal. PTFE (polytetrafluoroethylene) needle valves 6, due to their excellent corrosion resistance, effectively prevent sealing failures caused by gas corrosion in corrosive environments. They also allow for minute adjustments to the gas flow rate.

[0032] The first air inlet pipe 2 and the second air inlet pipe 3 are made of polyurethane explosion-proof material: connecting various fittings to realize the circulation of gas; the temperature is -30~65℃, the pressure range is 0-11 kg, and it has good corrosion resistance.

[0033] The first three-way quick connector 4 and the second three-way quick connector 7: realize the shunt of gas; the connector is convenient to use, can realize quick disassembly, has good sealing performance, is convenient to use, and adopts plastic steel material which has good corrosion resistance.

[0034] All equipment is made of non-metallic materials such as polytetrafluoroethylene, polyurethane and polypropylene. These materials exhibit excellent corrosion resistance in a hydrogen sulfide environment, avoiding gas leakage, flow control and other situations caused by corrosion during use, and improving the safety factor. The fittings used in the distributor are national standard products, and the installation of each fitting is simple and easy to operate, and can realize self-maintenance and replacement of fittings.

[0035] In use, connect various fittings and fix them in the box; among them, the outlet 1-6 is connected with the experimental container, and hydrogen sulfide and N2 are connected with the external pressure reducing valve (not shown in the figure); then close the needle valve 6 and screw the sleeve three-way pipe 5 to the middle position; adjust the pressure reducing valve to keep the outlet pressure at about 0.2MPa, when using H2S gas, screw the sleeve three-way pipe 5 to the H2S position, slowly adjust the needle valve 6 to the required flow, and when using N2, screw the sleeve three-way pipe 5 to the N2 position, slowly adjust the needle valve 6 to the required flow.

[0036] The detection part 8 includes an upper cover plate 81, a lower cover plate 82 and a detection box 83. The upper cover plate 81 and the lower cover plate 82 are spliced to form a sealed cavity inside, and the first three-way quick connector 4, the second three-way quick connector 7, the sleeve three-way pipe 5 and the needle valve 6 are wrapped. A ring groove 84 is formed on the pipeline connecting the first three-way quick connector 4, the second three-way quick connector 7, the sleeve three-way pipe 5 and the needle valve 6. A clamping groove 85 is formed on the upper cover plate 81 and the lower cover plate 82, and the clamping groove 85 is a semicircular arc. The clamping groove 85 is installed in the ring groove 84.

[0037] Because the first air inlet pipe 2 and the second air inlet pipe 3 are connected with various valves, the interface is prone to leakage, and real-time monitoring of the interface is required. By setting the detection part 8, the interface is detected. When there is a gas leakage, an alarm will be generated and the information will be transmitted to the display 11, prompting the staff.

[0038] The first three-way quick coupling 4, the second three-way quick coupling 7, the sleeve three-way 5 and the needle valve 6 are wrapped by the plurality of upper cover plates 81 and the lower cover plates 82, the upper cover plates 81 and the lower cover plates 82 can constitute an internal hollow cavity, the clamping slots 85 on the upper cover plates 81 and the lower cover plates 82 are correspondingly clamped in the ring grooves 84 during installation, and the upper cover plates 81 and the lower cover plates 82 are fixed by bolts, and the upper cover plates 81 and the lower cover plates 82 can be provided in various shapes to adapt to the corresponding first three-way quick coupling 4, the second three-way quick coupling 7, the sleeve three-way 5 and the needle valve 6.

[0039] The detection box 83 is composed of the upper box body 87 fixed on one side of the upper cover plate 81 and the lower box body 88 fixed on the lower cover plate 82, the detection block 811 is installed in the inside of the lower box body 88, the gas outlet hole 812 is opened on the detection block 811, the connecting pipe 813 is opened in the inside of the detection block 811, the inlet of the connecting pipe 813 is communicated with the inside of the lower cover plate 82, the adjusting rod 814 is installed in the inside of the connecting pipe 813, the gas guide pipe 815 is opened on one end of the adjusting rod 814, the gas guide pipe 815 is L-shaped with the connecting pipe 813, wherein when the gas enters the inside of the upper cover plate 81 and the lower cover plate 82, the gas enters the connecting pipe 813 and pushes the adjusting rod 814 to move to one side, so that the connecting pipe 813, the gas guide pipe 815 and the gas outlet hole 812 are communicated, the other end of the connecting pipe 813 is installed with the hydraulic cylinder 816, one side of the hydraulic cylinder 816 is installed with the spring 817, the other side of the spring 817 is fixed on the end of the adjusting rod 814, the adjusting rod 814 is provided with the storage battery 818, the detection block 811 is installed with the alarm 819, wherein when the gas pushes the adjusting rod 814 to move to the direction of the compression spring 817, the storage battery 818 is connected with the alarm 819 and is electrified.

[0040] After the upper cover plate 81 and the lower cover plate 82 are fixed, the upper box body 87 and the lower box body 88 are also fixed, when the gas leakage occurs at the connection between the valve and the pipeline, the gas directly enters the cavity in the upper cover plate 81 and the lower cover plate 82, when the gas in the cavity reaches a certain amount, the gas enters the detection block 811 from the pipe opening of the connecting pipe 813, and pushes the adjusting rod 814 in the connecting pipe 813 to move, the adjusting rod 814 moves to the direction of the compression spring 817, when the storage battery 818 on the adjusting rod 814 moves to the position of the alarm 819, the positive and negative poles of the storage battery 818 electrify the alarm 819, and alarm, and the information is transmitted to the display 11 for real-time monitoring.

[0041] At the same time, the gas enters the guide pipe 815 again through the connecting pipe 813, and is discharged into the gas collection space inside the upper box 87 and the lower box 88. When the gas leakage occurs, the first air inlet or the second air inlet stops the air supply first, and the gas inside the upper box 87 and the lower box 88, the upper cover plate 81 and the lower cover plate 82 is extracted by starting the air pump 8110, and is collected through the external pipeline. Since there may still be gas between the upper cover plate 81 and the lower cover plate 82 after the gas inside the upper box 87 and the lower box 88 is extracted, and the adjusting rod 814 is reset by the spring 817 at this time, the guide pipe 815 and the gas outlet hole 812 cannot be connected. By starting the hydraulic cylinder 816 to drive the spring 817 and the adjusting rod 814 to contract, the connecting pipe 813, the guide pipe 815 and the gas outlet hole 812 are connected, and the remaining gas between the upper box 87 and the lower box 88 is collected.

[0042] The connecting part of the upper cover plate 81, the lower cover plate 82, the upper box 87 and the lower box 88 is provided with a sealing ring 86.

[0043] The sealing ring 86 can seal the upper cover plate 81 and the lower cover plate 82, the upper box 87 and the lower box 88, and prevent the gas leakage.

[0044] The sleeve tee 5 switch is installed on the top of the distribution box 1, and the needle valve 6 switch is installed on the side wall of the distribution box 1, which can conveniently adjust the needle valve 6 and the sleeve tee 5.

[0045] Based on the above ideal embodiments according to the application, the related personnel can make various changes and modifications without deviating from the technical idea of the application. The technical scope of the application is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims

1. A distributor for preventing gas backflow corrosion based on flow control, comprising a distribution box (1) and a display (11) installed on the distribution box (1), characterized in that, one side of the distribution box (1) is provided with a first air inlet pipe (2), the other side of the distribution box (1) is provided with a second air inlet pipe (3), one side of the first air inlet pipe (2) is provided with a plurality of first three-way quick couplings (4), a plurality of the first three-way quick couplings (4) are connected to each other, one side of the first three-way quick couplings (4) is provided with a plurality of sleeve three-ways (5), one side of the sleeve three-ways (5) is provided with a plurality of needle valves (6), one side of the second air inlet pipe (3) is provided with a plurality of second three-way quick couplings (7), a plurality of the second three-way quick couplings (7) are connected to each other, the second three-way quick couplings (7) are connected with the sleeve three-ways (5), the first three-way quick couplings (4), the second three-way quick couplings (7), the sleeve three-ways (5) and the needle valves (6) are all provided with detection parts (8), wherein the detection parts (8) are used for real-time detection of the air tightness of the first air inlet pipe (2) and the second air inlet pipe (3); the detection parts (8) comprise an upper cover plate (81), a lower cover plate (82) and a detection box (83), the upper cover plate (81) and the lower cover plate (82) are spliced to form a sealed cavity inside, and the first three-way quick couplings (4), the second three-way quick couplings (7), the sleeve three-ways (5) and the needle valves (6) are wrapped; the detection box (83) is composed of an upper box body (87) fixed on one side of the upper cover plate (81) and a lower box body (88) fixed on the lower cover plate (82), a detection block (811) is installed inside the lower box body (88), an air outlet hole (812) is formed in the detection block (811), a connecting pipe (813) is formed in the inside of the detection block (811), the inlet of the connecting pipe (813) is communicated with the inside of the lower cover plate (82), an adjusting rod (814) is installed in the inside of the connecting pipe (813), a gas guide pipe (815) is formed at one end of the adjusting rod (814), the gas guide pipe (815) and the connecting pipe (813) are L-shaped, wherein when the upper cover plate (81) and the lower cover plate (82) are entered by gas inside, the gas enters the connecting pipe (813) and pushes the adjusting rod (814) to move to one side, so that the connecting pipe (813), the gas guide pipe (815) and the air outlet hole (812) are communicated; the other end of the connecting pipe (813) is provided with a hydraulic cylinder (816), one side of the hydraulic cylinder (816) is provided with a spring (817), the other side of the spring (817) is fixed to the end of the adjusting rod (814). The adjusting rod (814) is provided with a battery (818), and the detection block (811) is provided with an alarm (819), wherein when the gas pushes the adjusting rod (814) to move towards the compression spring (817), the battery (818) is connected with the alarm (819) and is powered on; The inner distribution box (1) of the lower box body (88) is provided with gas pumps (8110), the gas outlet of the gas pump (8110) is located outside the lower box body (88), the gas inlet is located inside the box body, the gas outlets of a plurality of gas pumps (8110) are connected with each other through pipelines and extend to the outside of the box body.

2. The gas distributor based on shunt control to prevent gas backflow corrosion according to claim 1, wherein, The sleeve tee (5) switch is installed on the top of the distribution box (1), and the needle valve (6) switch is installed on the side wall of the distribution box (1).

3. The gas distributor based on shunt control to prevent gas backflow corrosion according to claim 1, wherein, A ring groove (84) is formed on the pipeline at the connection between the first tee quick coupler (4), the second tee quick coupler (7), the sleeve tee (5) and the needle valve (6), a clamping groove (85) is formed on the upper cover plate (81) and the lower cover plate (82), the clamping groove (85) is semicircular, and the clamping groove (85) is installed in the ring groove (84).

4. The gas distributor based on shunt control to prevent gas backflow corrosion according to claim 1, wherein, Sealing rings (86) are installed at the connections between the upper cover plate (81), the lower cover plate (82), the upper box body (87) and the lower box body (88).

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