KR102322063B1 - Valve connector assembly for multiple high pressure gas vessels - Google Patents

Abstract

A valve connector assembly for a plurality of high pressure gas vessels in accordance with the present invention comprises: a three-way valve connected to each of a plurality of high pressure gas vessels arranged in a line and including a main pipe having a thread on the outer circumference surface while extending in a straight line in the arrangement direction of the high pressure gas vessels, and a sub-pipe branching from one side of the main pipe to be connected to the high pressure gas vessels; a connector inserted and combined in an opening penetrating the end part at one side of the main pipe, and having a thread formed on the outer circumference surface of end parts at both sides; a ring-shaped coupler including a thread on the inner circumference surface, combined with the outer circumference surface of the connector by the thread, and placed in the hollow of the main pipe; and a nut combined with the main pipe by the thread as inserted into and combined with the outer circumference surface of the connector. In accordance with the valve connector assembly for a plurality of high-pressure gas vessels in accordance with the present invention, the combination structure of the valve and the connector, which is stable and provides convenience in installation, maintenance and repairs, can be ensured.

Description

Valve connector assembly for multiple high pressure gas vessels

The present invention relates to a valve connector assembly for a plurality of high-pressure gas containers, and more particularly, a valve for connecting a plurality of high-pressure gas containers, but providing an improved assembly structure from the welding structure of the past to enhance convenience as well as stability of manufacture It relates to an assembly (assembly) of connectors.

A high-pressure gas container is a container in which various gases are stored in a high-pressure filling method. The high-pressure gas containers commonly found in the market are, for example, oxygen, nitrogen, carbon monoxide, chlorine, ammonia, silane, helium, hydrogen, carbonic acid, and LPG containers. can be said

When a gas leak occurs, liquefied petroleum gas (LPG), including high-pressure gas, is heavier than air and does not diffuse into the air and accumulates in the lower part of the leak site. In this case, an explosion accident may occur due to static electricity or sparks.

Therefore, the combustible high-pressure gas or LPG container is installed in a well-ventilated place outside the building and connected to the gas burner installed inside the building through the window via the hose to the pressure regulator of the container.

On the other hand, as the law was amended from the existing weight sales method to the volume sales method, several LPG containers were arranged so that LPG could be sold by volume, and then a valve and a pipe, i.e. a connecting pipe, were connected to convert the LPG into a gas collection device (gas supply device). The charging method is widely used.

At this time, the connection pipe connecting several LPG containers and the valve was manufactured by a welding method in the past, but this welding method has problems with poor installation efficiency as well as difficulties in manufacturing and maintenance.

The welding method of high carbon steel, which is Korean Patent Publication No. 10-2001-0026304, installs an LPG storage unit composed of a used LPG storage unit and a spare LPG storage unit composed of a plurality of LPG containers, respectively, and supplies LPG gas from the LPG storage unit to the LPG storage unit. It is supplied to the LPG supply unit formed on the lower welding die on the inlet and outlet side through the supply line to burn and remove oxygen around the welding machine, but from the compressed air storage unit, compressed air with a compressed air control valve and booster regulator operated by a solenoid valve is supplied. By supplying compressed air to the LPG supply line near the welding machine through the line to remove the LPG gas remaining after use, it is disclosed that there is a characteristic capable of preventing the breakage of the welding part.

However, according to the above technology, it is not suitable for assembling an LPG container for home or living as described above, rather than a large-capacity LPG supply line, and is not suitable due to a complicated process, but also requires a lot of installation cost and time.

In order to solve this problem, a structure in which a worker can easily assemble and connect a high-pressure gas container including a plurality of LPG containers with a valve is required. ) and solving the gas leak problem is the most important thing.

Therefore, there is a need to develop a new and advanced connection structure for a high-pressure gas container that guarantees stability by presenting a structure that can conveniently connect the high-pressure gas container by prefabricating rather than welding, but guaranteeing airtightness and a strong bonding relationship.

The present invention has been devised to overcome the problems of the above technology, and by connecting the high-pressure gas container together with the valve in a prefabricated, not welding, valve connector assembly that provides convenience in manufacturing and maintenance and guarantees stability. Its main purpose is to provide

Another object of the present invention is to provide a means for checking whether there is a leak between the valve and the connecting pipe.

Another object of the present invention is to provide a cap capable of completely sealing a region through which gas does not flow.

It is a further object of the present invention to provide a composition that has corrosion resistance to gas and secures stable durability even after long-term use.

In order to achieve the above object, a plurality of valve connection pipe assemblies for high-pressure gas containers according to the present invention are respectively connected to a plurality of high-pressure gas containers arranged in a line, and extend in a straight line along the arrangement direction of the high-pressure gas container. a 3-way valve including a main pipe having a thread on the outer circumferential surface in the state, and a sub pipe branched from one side of the main pipe and connected to the high-pressure gas container; a connection pipe which is inserted into and coupled to an opening penetrated at one end of the main pipe, and a screw thread is formed on the outer circumferential surface of both ends; a ring-shaped coupler positioned in the hollow of the main pipe while screwing with the outer circumferential surface of the connecting pipe in a state having a screw thread on the inner circumferential surface; and a nut screwed to the main pipe in a state of being fitted to the outer circumferential surface of the connection pipe.

In addition, the valve connection pipe assembly, the cap is inserted into the hollow of the main pipe located at the outermost; it characterized in that the nut is threadedly coupled to the outer circumferential surface of the main pipe into which the cap is inserted.

In addition, the cap includes a first cylindrical body having a first diameter and a cylindrical second body having a second diameter larger than the first diameter in a portion opposite to the opening in the first body. characterized in that

According to the valve connection pipe assembly for a plurality of high-pressure gas containers according to the present invention,

1) It has the advantage of ensuring a stable coupling structure between the valve and the connecting pipe while having the convenience of installation and maintenance,

2) It is easy to check whether gas is leaking from the valve, enabling quick follow-up actions.

3) As well as ensuring airtightness to completely seal unused valves through the cap,

4) The corrosion-resistant composition is coated on the inner circumferential surface of the connector to provide the effect of further reinforcing the durability of the connector.

1 is a perspective view schematically showing a valve tube assembly for connecting a plurality of high-pressure gas containers.
Figure 2 is an exploded perspective view showing a detailed configuration constituting the valve connector assembly.
Figure 3 is an assembly view of the detailed configuration of the valve connector assembly.
Fig. 4 is a cross-sectional view of Fig. 3;
5 is a perspective view showing an improved structure of the cap.
Figure 6 is a flow chart showing the steps of manufacturing a corrosion resistant.
7 is a flow chart showing the steps of preparing a miscibility increasing agent.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numbers in each drawing refer to like elements.

1 is a perspective view schematically illustrating a valve tube assembly for connecting a plurality of high-pressure gas containers.

As can be seen from FIG. 1, the valve tube assembly of the present invention includes a plurality of 3-way valves 10 and the plurality of 3-way valves 10 connected to each other for gas supply or filling in the high-pressure gas container 1 arranged in plurality. It is based on a combination of the connecting pipe 20 and the accessory components connecting the 3-way valve 10.

Here, the high-pressure gas container 1 is a container in which, for example, a gas is accommodated therein in a high-pressure filling manner by standing up in a cylindrical shape as shown in FIG. 1 , wherein the high-pressure gas is, for example, liquefied petroleum gas LPG), as well as various gases (gases) such as hydrogen and oxygen. In other words, the high-pressure gas container 1 may be named by various names depending on the type of gas accommodated as well as the LPG container, and is not limited to the type of gas. However, for convenience of explanation, the high-pressure gas container 1 of the present invention will be described later, for example, as a known LPG container.

A plurality of such high-pressure gas containers 1 may be disposed. When a plurality of high-pressure gas containers 1 are disposed in this way, for example, for collecting LPG from a plurality of LPG containers in order to sell LPG in volume. It can be said that it is an environment for reducing time and improving work efficiency when you want to fill LPG into an empty LPG container through a gas collecting device equipped with a backflow prevention function in the gas collecting means.

On this basis, each high-pressure gas container 1, that is, the LPG container is connected to each valve to accommodate the LPG, that is, the 3-way valve 10 is disposed corresponding to the number of LPG containers.

The high-pressure gas container (LPG container) 1 and the 3-way valve 10 may be connected in various ways, but as shown in FIG. After placing in a line, the 3-way valve 10 and the connecting pipe 20 can be seated/disposed along the upper surface of the support. Here, the outermost (left in Fig. 1) side connection pipe is connected to the gas collection device, it is possible to provide an environment through which the gas can be supplied.

In the present invention, such a 3-way valve 10 and a connecting pipe 20 alc connecting them are named a valve connector assembly to be described later.

In the valve connector assembly, when the high-pressure gas is filled into the high-pressure gas container (1), the gas leaks or does not withstand high pressure, and depending on the type of high-pressure gas, it is possible to prevent sparks and even explosion, as well as prevent the risk of explosion. Even so, it is most important to have stability to prevent corrosion by gas. Hereinafter, the structural characteristics of the detailed configuration for this and furthermore, the characteristics of the corrosion-resistant composition will be sequentially described.

FIG. 2 is an exploded perspective view illustrating a detailed configuration of the valve connector assembly, FIG. 3 is an assembly view of the detailed configuration of the valve connector assembly, and FIG. 4 is a cross-sectional view of FIG. 3 .

As can be seen from FIGS. 2 to 4 , the valve connector assembly of the present invention basically includes a 3-way valve 10 , a connector 20 , and a coupler 30 and a nut 40 . .

The 3-way valve 10 has a structure of a well-known 3-way valve in a state in which each is connected to the number of a plurality of high-pressure gas containers 1 arranged in a line, and in detail, it stands up It is installed on the upper end of the standing pipe 13 and includes a main pipe 11 and a sub pipe 12 in a state equipped with a handle 14 for controlling the opening and closing of the 3-way valve 10 .

The main pipe 11 is a pipe-shaped structure having a thread 11a on its outer circumferential surface while extending in a straight line along the arrangement direction of the high-pressure gas container 1 . The main pipe 11 has openings at both ends and a hollow is formed therein to provide a space for gas to move.

At this time, the screw thread (11a) provides a function for assembling/fastening the nut 40 and the threaded method to be described later, it is not necessary to be formed on the entire outer peripheral surface of the main pipe 11, and it is also formed around the end of the opening side. possible.

The sub-pipe 12 is a pipe-shaped structure that is branched from one side (preferably the central part) of the main pipe 11 to the high-pressure gas container 1 and is connected to the high-pressure gas container 1, and includes the main pipe 11 and It is connected to the inner cylinder and serves to deliver the gas supplied from the main pipe 11 to the high-pressure gas container 1 .

Since this 3-way valve 10 has the same or similar structure to a general 3-way valve as mentioned above, further description will be omitted.

The connecting pipe 20 is a kind of pipe connecting each of the 3-way valves 10 , and is inserted and coupled to both ends or one side openings of the 3-way valve 10 . At this time, a screw thread 21 is formed on the outer peripheral surface of both ends of the connection pipe 20 for screw thread coupling with a coupler 30 to be described later.

The coupler 30 is tightly coupled to the hollow of the main pipe 11 to secure a close coupling relationship while maintaining airtightness between the 3-way valve 10 and the connecting pipe 20, and has a thread on the inner circumferential surface It is a ring-shaped structure located in the hollow of the main pipe 11 while screwing the outer circumferential surface of the connecting pipe 20 in one state.

At this time, the coupler 30 has a structure similar to a known packing in that it has a ring shape, but the diameter of the coupler 30 is the same as or similar to the inner diameter of the hollow of the main pipe 11, the main pipe ( 11) provides a function of maintaining the state of being inserted and coupled to the main pipe 11 more firmly by screwing the end of the connector 20 and threaded coupling while ensuring airtightness by closely bonding to the hollow of 11). It performs a function that is differentiated from known packing in that it does.

The nut 40 performs a function of threaded coupling to the main pipe 11 in a state of being fitted to the outer circumferential surface of the connection pipe 20 .

When the connection structure of the detailed configuration is described again based on this structure, the connection pipe 20 is inserted into the hollow of the main pipe 11 in a state where the coupler 30 and the screw thread are coupled, and the coupler 30 is the main pipe It is tightly coupled to the hollow of (11) to prevent the problem that the connection pipe 20 is pushed or flowed from the main pipe 11 or both are separated when high-pressure gas is injected, resulting in an unstable state. As can be seen from FIG. 3 , this structure consists of a complex structure continuously connecting between the plurality of 3-way valves 10 .

Furthermore, since the nut 40 is threadedly coupled to the main pipe 11 in such a way that the nut 40 covers the outer circumferential surface of the main pipe 11 (which may include a part of the outer circumferential surface of the coupling pipe) into which the connector 20 is inserted, as a result, the main The nut 40 is tightly coupled to the outer circumferential surface of the tube 11, and the coupler 30 is tightly coupled to the outer circumferential surface to maintain excellent airtightness with the connecting tube.

In summary, the 3-way valve 10 and the connecting pipe 20 are assembled and connected in a simpler way than the known welding method, which is difficult to manufacture and maintain, but 3-way by the complex coupling structure of the coupler 30 and the nut 40 By providing a tight coupling structure between the way valve 10 and the connecting pipe 20, it provides stability that can completely prevent gas leakage or the connecting pipe 20 from being separated from the main pipe 11. have

On the other hand, the above-described connection pipe 20 and the coupler 30 may be coupled to both ends of the main pipe 11, but as can be seen from FIG. 2, in the main pipe 11 located at the outermost side, one end is connected The coupler 30 is coupled through the pipe 20, and the cap 50 may be coupled directly to the other end without the connection pipe 20, which will be described later.

Additionally, referring to the partially enlarged cross-sectional view of FIG. 4 , it can be seen that a check hole 41 is formed on one side of the nut 40 to reach the outer peripheral surface of the main pipe 11 .

When these check holes 41 are visually observed, bubbles are generated when gas is leaked, or maintenance/repair can be easily performed by checking the position of the connecting pipe 20, that is, connecting to the main pipe 11 It provides a characteristic that can easily check whether a leak has occurred due to an unstable coupling state of the tube 20 .

In addition, as can be seen from Fig. 4, at one end (right end: one end in Fig. 4) of the main pipe 11 located at the outermost (opposite side of the gas collection device), a coupler ( 30) is coupled and the other end (left end: the other end in FIG. 4) may be coupled with a cap 50 directly inserted into the hollow without the connector 20.

In other words, the 3-way valve 10 is not disposed on the outside of the main pipe 11 located on the opposite side of the gas collection device, so it is necessary to airtightly process it. For this, a cap 50 is added This means that it can be provided as

Referring to FIG. 4 , the cap 50 is inserted into the hollow of the main pipe 11 located at the outermost side in a state having an outer diameter corresponding to the diameter of the hollow/inner peripheral surface of the main pipe 11 to prevent the inflow/outflow of gas. The unnecessary outermost main pipe 11 is sealed.

As described above, the nut 40 is threadedly coupled to the outer peripheral surface of the main tube 11 into which the cap 50 is inserted, thereby providing a function of fixing the cap 50 so as not to be easily separated from the main tube 11 .

The cap 50 is based on having a cylindrical shape corresponding to the hollow shape of the main pipe 11, through which the main pipe 11 located on the outermost side in the outermost 3-way valve 10 as well. This can effectively prevent gas leakage.

5 is a perspective view illustrating an improved structure of a cap.

5 shows the improved structure of the cap 50 described above, it can be said that the structure of the cap 50 for maintaining more perfect sealing/airtightness is presented.

Specifically, the cap 50 according to FIG. 5 includes a first body 51 having a cylindrical shape having a first diameter, and a portion on the opposite side from the opening of the main tube 11 in the first body 51 (ie, the opening). It is possible to include a cylindrical second body 51 having a second diameter larger than the first diameter in the portion inserted into the hollow inside of the main tube.

At this time, the second body 51 has a structure equal to or corresponding to the diameter of the hollow of the main tube 11 to provide a main function of sealing the hollow of the main tube 11 .

As such, by the cap 50 having a three-dimensional structure composed of the first and second bodies 51 and 52 with a difference in diameter as described above, the convenient insertion state of the main tube 10 into the hollow is achieved compared to a cylindrical cap having the same diameter. While ensuring that the second body 52 can provide a base that can enter more deeply into the hollow of the main tube (11).

In addition, the second body 52 is not formed at the end of the first body 51 as can be seen from FIG. 4 and the like, so the remainder of the first body 51 to the outside at the formation point of the second body 52 . Since the portion has an additionally extended structure, a buffer space is secured by the remaining portion of the first body 51 through this, so that when the cap 50 is inserted into the main tube 11, the repulsive force due to unnecessary air compression is reduced. It is possible to solve the problem that the cap 50 is not tightly coupled in the main tube 11.

Furthermore, it is possible to form a chamfer part 53 obtained by chamfering a corner portion of the first body 51 to the second body 52 side end (remaining portion of the first body described above).

The chamfer part 53 provides a basis for minimizing the air repulsion force described above in the process in which the cap 50 is inserted into the main pipe 11, as well as attaching the cap 50 to the main pipe 11 through this. In addition to providing the convenience of being able to be easily coupled to the main pipe 11, the air compressed in the main pipe 11 is released into an additional space by the chamfer part 53 while the cap 50 is entered into the main pipe 11. As a result, it provides a characteristic capable of reliably preventing a phenomenon in which unnecessary residual air remains in the main pipe 11 by allowing it to escape.

In the LPG exemplified as a kind of high-pressure gas above, there may be a problem that a gas explosion may be caused by the acetylene gas contained in the LPG.

Therefore, it is preferable to manufacture the connection pipe 20 of stainless steel (stainless steel) in order to ensure stability as a result while preventing unnecessary reactions with explosive gases such as LPG as well as acetylene gas.

Furthermore, as described above, in a state in which the connector 20 is made of stainless steel, it is possible to coat the inner circumferential surface of the connector 20 with an anticorrosive agent containing an epoxy resin.

That is, the stainless steel is corroded with a specific component of the high-pressure gas to form a roughness on the inner circumferential surface of the connection pipe 20, thereby preventing sparks or even the risk of explosion during gas injection. 20) is to prevent corrosion by various factors and to preserve durability for a long time.

Here, the corrosion-resistant agent can provide excellent corrosion resistance, including the epoxy resin, which has excellent adhesion to metal materials (especially, stainless steel) due to the nature of the epoxy resin, so that it has excellent adhesion to the inner peripheral surface of the connection pipe 20 made of stainless steel. This is because, in addition to exhibiting properties, it has excellent physical properties after curing, such as heat resistance, corrosion resistance, and electrical insulation.

Here, preferably, as the epoxy resin, bisphenol A epoxy resin, bisphenol F epoxy resin, novolac epoxy resin, and aliphatic epoxy resin may all be used. In this case, any one of the epoxy resins or a mixture thereof may be applied, but most For example, bisphenol F epoxy resin can be selectively applied.

This is because the bisphenol F epoxy resin has excellent heat resistance and chemical resistance as well as flexibility in the case of the bisphenol F epoxy resin.

Therefore, by coating the inner circumferential surface of the connection pipe 20 made of stainless steel with such a corrosion-resistant agent, it is possible to prevent corrosion even when the connection pipe 20 is repeatedly contacted with high-pressure gas, so that the connection pipe 20 It provides characteristics that can extend the lifespan of the product and secure durability at the same time.

Figure 6 is a flow chart showing the steps of manufacturing a corrosion-resistant.

As can be seen from FIG. 6 , the corrosion-resistant agent may further include an additional composition in addition to the bisphenol F epoxy resin, and the corrosion-resistant agent includes a step of preparing a first mixed solution (S11), a step of preparing a second mixed solution (S12), It can be manufactured through the step (S13) of completing the corrosion resistance.

(S11) preparing a first mixed solution

First, 50 to 70 parts by weight of bisphenol F epoxy resin, 20 to 40 parts by weight of polyolefin, and 10 to 30 parts by weight of titanium dioxide are mixed to prepare a first mixed solution.

Bisphenol F epoxy resin is known to have a high content of epoxy functional groups compared to bisphenol A epoxy resin, which is generally used the most among epoxy resins, and is known to have excellent chemical resistance.

Polyolefin is a high molecular compound produced by polymerization of olefin (a chain hydrocarbon compound having one double bond), and is known for its low density, heat resistance, and excellent transparency. It serves as a solvent for dissolving the bisphenol F epoxy resin.

Titanium dioxide performs a function as an inorganic filler in the anticorrosive agent of the present invention, is dispersed without dissolving in the first mixed solution, and has a high level of strength and hiding properties to increase the film strength for the corrosion-resistant coating film. carry out

(S12) preparing a second mixed solution

Subsequently, 75 to 90 parts by weight of the first mixture, 5 to 10 parts by weight of butyltriphenylphosphonium bromide, and 1 to 10 parts by weight of furfuryl sulphide, and propylene carbonate 3 to 10 parts by weight to prepare a second mixed solution.

Butyltriphenylphosphonium bromide is added as a curing agent for accelerating the curing of the above-described bisphenol F epoxy resin, and according to the addition, a corrosion resistant agent containing bisphenol F epoxy resin forms a coating film on the inner peripheral surface of the connecting pipe body faster.

Furfuryl sulfide is added to maximize the dispersion effect of various components included in the corrosion-resistant agent, and furthermore, the prepared corrosion-resistant agent serves to easily form a film on the inner circumferential surface of the connector body.

Propylene carbonate serves as a solvent miscible with water and various solvents, and at the same time serves to reduce the viscosity of the mixed material, thereby increasing the miscibility of various components added to the corrosion-resistant agent, and furthermore, a corrosion-resistant agent It plays a role in improving usability in the coating of

(S13) Step of completing the anticorrosive agent

Finally, 85 to 95 parts by weight of the second liquid mixture, 3 to 10 parts by weight of cerium oxide nanoparticles, and 1 to 10 parts by weight of a miscibility increasing agent comprising Cetrimonium Chloride Mix to complete the anticorrosive agent.

The cerium oxide nanoparticles are mixed with a corrosion-resistant agent and used to manufacture an organic-inorganic hybrid composite, and an effect of improving the strength of the corrosion-resistant film can be expected. In addition, the cerium oxide nanoparticles form a dense film on the surface of the corrosion-resistant agent, and thus have an excellent protective effect on the inside of the film, thereby maximizing the corrosion resistance.

Furthermore, the miscibility increasing agent may be added to the corrosion resistant agent in a state containing cetrimonium chloride, which disperses or suspends the insoluble solids contained in the corrosion resistant agent, that is, titanium dioxide and cerium oxide nanoparticles. It serves to increase the miscibility by performing a role to form an even dispersion.

Therefore, as such a corrosion-resistant agent is coated on the inner circumferential surface of the connector, it can exhibit better corrosion resistance than a case made of a single epoxy resin, and furthermore, the corrosion-resistant agent is strongly adhered to the inner circumferential surface of the connector and is not easily separated, The durability and strength of the coating film may also have excellent properties.

In order to test the physical properties of the corrosion-resistant agent of the present invention described above, the evaluation results of Examples and Comparative Examples will be compared and described. Examples are composed of Examples 1 and 2, which are preferred examples including the composition of the corrosion-resistant agent of the present invention, and the comparative example is a known corrosion-resistant agent that does not contain the composition of the corrosion-resistant agent of the present invention.

<Example 1>

A first mixed solution was prepared by mixing 60 g of bisphenol F epoxy resin, 30 g of polyolefin, and 10 g of titanium dioxide.

85 g of the prepared first mixed solution, 7 g of butyltriphenyl phosphonium bromide, 3 g of furfuryl sulfide, and 5 g of propylene carbonate were mixed to prepare a second mixed solution.

Finally, 90 g of the second liquid mixture, 5 g of cerium oxide nanoparticles, and 5 g of cetrimonium chloride were mixed and mixed at 1500 rpm for 3 minutes to complete 100 g of a corrosion resistant agent.

The prepared corrosion-resistant agent was spray-coated at a distance of 40 cm on a stainless steel substrate plate 60 mm × 60 mm × 3 mm (width × length × thickness), and heat-treated and cured at 150 ° C. for 1 hour to obtain a corrosion-resistant coated substrate prepared.

<Example 2>

95 g of bisphenol F epoxy resin and 5 g of butyltriphenylphosphonium bromide were mixed at 1500 rpm for 3 minutes to complete the corrosion resistance.

The prepared corrosion-resistant agent was spray-coated at a distance of 40 cm on a stainless steel substrate plate 60 mm × 60 mm × 3 mm (width × length × thickness), and heat-treated and cured at 150 ° C. for 1 hour to obtain a corrosion-resistant coated substrate prepared.

<Comparative example>

100 g of polyolefin was mixed at 1500 rpm for 3 minutes to complete the corrosion resistance.

The prepared corrosion-resistant agent was spray-coated at a distance of 40 cm on a stainless steel substrate plate 60 mm × 60 mm × 3 mm (width × length × thickness), and heat-treated and cured at 150 ° C. for 1 hour to obtain a corrosion-resistant coated substrate prepared.

In order to evaluate the corrosion resistance to the corrosion resistance of Examples 1 and 2 to Comparative Examples described above, the surface of the substrate and the surface of the substrate in which the substrate was immersed in saline containing NaCl at a concentration of 5% for 500 hours were examined under a stereoscopic microscope ( It was observed with a stereoscopic microscope (sometech, SV-35). It was confirmed that cracks occurred on the surface of the coated substrate, the coating film was peeled off, or there was no change depending on the observation.

Comparative table of the presence or absence of coating change in Examples and Comparative Examples Is there any change in the surface of the coated substrate? Example 1 no change Example 2 no change comparative example coating film peeling

As can be seen from the results in Table 1, it can be seen that Examples 1 to 2, which are preferred examples of the present invention, have excellent corrosion resistance compared to Comparative Examples.

Furthermore, the adhesive strength was evaluated by the ASTM D 3359 method for the substrates prepared in Examples 1 and 2 and Comparative Examples.

The degree of adhesion evaluation evaluates the degree of peeling of the coating film to 5B grade when peeling of the coating film does not occur, 4B grade when the coating film is peeled off by less than 5%, and 3B grade when the coating film is peeled by 5 to 15%, the coating film When the coating film was peeled off by 15 to 35%, it was graded 2B, when the coating film was peeled off by 35 to 65%, it was graded 1B, and finally, when the coating film was peeled off by more than 65%, it was graded 0B.

Comparative Table of ASTM Ratings of Examples and Comparative Examples ASTM grade Example 1 5B Example 2 4B comparative example 2B

As can be seen from the results in Table 2, it can be seen that Examples 1 to 2, which are preferred examples of the present invention, have superior adhesion compared to Comparative Examples. In addition, through the comparison between Example 1 and Example 2, it can be confirmed that Example 1 exhibits higher adhesion than Example 2.

7 is a flowchart illustrating the steps of preparing a miscibility increasing agent.

Referring to FIG. 7 , it can be seen that the above-described miscibility increasing agent may further include an additional composition in addition to cetrimonium chloride.

Such a miscibility increasing agent may be prepared through the step of preparing the first solution (S21), the step of preparing the second solution (S22), and the step of completing the miscibility increasing agent (S23).

(S21) preparing a first solution

First, 25 to 50 parts by weight of Cetrimonium Chloride, 30 to 60 parts by weight of divinylbenzene, and 10 to 40 parts by weight of Sorbitan Sesquiisostearate are mixed to form a first Prepare the solution.

Cetrimonium chloride serves to disperse or suspend the insoluble solid contained in the corrosion-resistant agent as described above to form an even dispersion, thereby increasing the miscibility.

Divinylbenzene is added as a solvent for cetrimonium chloride and at the same time as a branching agent. It is added to improve the melt properties of bisphenol F epoxy resin and polyolefin contained in the corrosion resistant agent and to increase workability. .

Sorbitan sesquiisostearate has a function as an emulsifier, and is added to increase the miscibility of various components included in the miscibility enhancer and the anticorrosive agent to which the miscibility enhancer is added.

(S22) preparing a secondary solution

Next, 75 to 95 parts by weight of the first solution, 5 to 15 parts by weight of Acetyl Tributyl Citrate, and 3 to 10 parts by weight of phenyl trimethicone are mixed to prepare a secondary solution do.

Acetyl tributyl citrate is added as a plasticizer, and to the bisphenol F epoxy resin and polyolefin contained in the corrosion resistant agent, it gives elasticity and flexibility, and lowers melt viscosity to improve processability for coating film formation.

Phenyltrimethicone is a silicone-based antifoaming agent added to prevent bubbles or bubbles from occurring on the coating film in a liquid corrosion resistant agent containing a miscibility enhancer and the miscibility increasing agent. Therefore, it is possible to form a more even corrosion-resistant coating film by phenyl trimethicone.

(S23) Completing the miscibility increasing agent

Finally, 85 to 95 parts by weight of the secondary solution, 5 to 10 parts by weight of C-mercaptotetrazol, and 1 to 5 parts by weight of dicyandiamide, and aluminum myristate (Aluminium Myristate) ) 1 to 3 parts by weight are mixed to complete the miscibility increasing agent.

C-mercaptotetrazole and dicyandiamide prevent the strength of the bisphenol F epoxy resin and polyolefin, which are the base materials of the corrosion-resistant agent, from being deteriorated by various plasticizers and branching agents included in the miscibility increasing agent, and increase the curing speed. It is added as a curing agent for

Aluminum myristate is added to enhance the functions of the miscibility enhancing agent and branching agent such as sorbitan sesquiisostearate and divinylbenzene included in the miscibility enhancing agent described above.

Therefore, according to the addition of the miscibility increasing agent, the processability and flexibility of the resin contained in the liquid corrosion-resistant agent is improved, and at the same time, the miscibility between the insoluble solid and the resin base is improved, and furthermore, the curing speed and the film strength are improved. It can be made to form an even coating film.

As described so far, the configuration and operation of a plurality of valve connector assemblies for high-pressure gas containers according to the present invention have been expressed in the above description and drawings, but these are merely examples and the spirit of the present invention is reflected in the above description and drawings. It is not limited, and various changes and modifications are possible without departing from the technical spirit of the present invention.

1: High pressure gas container (LPG container) 2: Support
10: 3-way valve 11: main pipe
11a: thread 12: sub tube
13: standing building 14: handle
20: connector 21: thread
30: coupler 40: nut
41: check hole 50: cap
51: first body 52: second body
53: chamfer part

Claims (8)

A valve connector assembly for a plurality of high-pressure gas vessels, comprising:
A main tube connected to a plurality of high-pressure gas containers arranged in a line, each having a screw thread on an outer circumferential surface in a state in which it extends in a straight line along the arrangement direction of the high-pressure gas container, and the high-pressure gas container is branched from one side of the main tube 3-way valve with sub-pipe connected to gas vessel;
a connection pipe made of a stainless material that is inserted into and coupled to an opening penetrated at one end of the main pipe and has threads formed on the outer circumferential surface of both ends;
a ring-shaped coupler positioned in the hollow of the main pipe while screwing with the outer circumferential surface of the connecting pipe in a state having a screw thread on the inner circumferential surface;
Including; a nut screwed to the main pipe in a state of being fitted to the outer circumferential surface of the connection pipe;
The inner circumferential surface of the connector is coated with a corrosion-resistant agent containing an epoxy resin,
The anticorrosive agent,
Preparing a first mixed solution by mixing 50 to 70 parts by weight of bisphenol F epoxy resin, 20 to 40 parts by weight of polyolefin, and 10 to 30 parts by weight of titanium dioxide;
75 to 90 parts by weight of the first mixture, 5 to 10 parts by weight of butyltriphenylphosphonium bromide, and 1 to 10 parts by weight of furfuryl sulphide, and 3 to propylene carbonate preparing a second mixed solution by mixing 10 parts by weight;
85 to 95 parts by weight of the second mixture, 3 to 10 parts by weight of cerium oxide nanoparticles, and 1 to 10 parts by weight of a miscibility increasing agent comprising Cetrimonium Chloride Completing the corrosion resistance; characterized in that manufactured through, the valve connector assembly. The method of claim 1,
On one side of the nut,
A valve connector assembly, characterized in that a check hole is formed to reach the main pipe. The method of claim 1,
The valve connector assembly,
Including; a cap inserted into the hollow of the main tube located in the outermost part;
On the outer peripheral surface of the main tube into which the cap is inserted,
A valve connector assembly, characterized in that the nut is threaded. 4. The method of claim 3,
The cap is
a first body having a cylindrical shape having a first diameter;
and a second cylindrical body having a second diameter larger than the first diameter in a portion opposite to the opening in the first body. 5. The method of claim 4,
At the end of the second body side in the first body,
A valve connector assembly, characterized in that a chamfered part is formed by chamfering the corner portion. The method of claim 1,
The miscibility increasing agent,
Cetrimonium chloride (Cetrimonium Chloride) 25 to 50 parts by weight, divinylbenzene (dibinylbenzene) 30 to 60 parts by weight, and sorbitan sesquiisostearate (Sorbitan Sesquiisostearate) by mixing 10 to 40 parts by weight of the first solution manufacturing;
Preparing a second solution by mixing 75 to 95 parts by weight of the first solution, 5 to 15 parts by weight of Acetyl Tributyl Citrate, and 3 to 10 parts by weight of phenyl trimethicone ;
85 to 95 parts by weight of the secondary solution, 5 to 10 parts by weight of C-mercaptotetrazol, and 1 to 5 parts by weight of dicyandiamide, and aluminum myristate 1 to 3 parts by weight to complete the mixing enhancer; characterized in that manufactured through, the valve connector assembly. delete delete

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