KR102230648B1 - Joint Pipe have Sealing Member for Connecting Pipe and Manufacturing Method of Sealing Member - Google Patents

Abstract

The present invention relates to a method of manufacturing a joint pipe having a sealing member for pipe connection and a method of manufacturing a sealing member, and a first sealing ring and a second sealing ring are continuously formed at each end of both sides for connection of pipes that are inserted into both sides. , On the other hand, the first sealing ring is sealed through a metal ring, while the second sealing ring is provided with a joint pipe having a sealing member for connecting a pipe in which sealing is performed through a sealing member, while fluorspar (ClaF2 The raw material collected from the raw stone (fluorite) is purified and powdered, and then manufactured through compression, heat treatment, and grinding. As it is worn on the joint pipe that connects the pipes for moving high temperature fluids or chemical fluids, An object of the present invention is to provide a method of manufacturing a sealing member for pipe connection that manufactures a sealing member that semi-permanently prevents external loss of high-temperature fluid or chemical fluid without changing physical properties even in long-term contact.

Description

Joint Pipe have Sealing Member for Connecting Pipe and Manufacturing Method of Sealing Member}

The present invention relates to a joint pipe having a sealing member for pipe connection and a method of manufacturing the sealing member, and more particularly, a joint pipe having a sealing member for connecting pipes used for transporting high temperature fluid or chemical fluid. B. To provide a sealing member that can semi-permanently prevent loss of fluid without change in physical properties despite being in contact with a chemical fluid for a long period of time, while providing a manufacturing process for the sealing member.

Pipes are generally used to move each type of fluid, and since they have an appropriate length individually, joint pipes for connection purposes that enable these pipes to be connected to each other are also installed at construction sites.

Particularly, piping for the purpose of moving fluid in a high temperature state or a fluid in a compound state is a method to prevent leakage of fluid in the process of being connected through a joint pipe, as a sealing member, such as O-ring, is filled to ensure airtightness. , It prevents the fluid from being lost to the connection part of the pipes.

However, as a sealing member used in a joint pipe used for connection of pipes, for example, most O-rings are made of rubber material, so they have frequent contact with the O-rings in the process of moving a fluid made of compound through the pipes. Accordingly, the rubber-made O-ring loses its original properties and properties through chemical action, so that the airtightness of the O-ring decreases over a long period of time, causing a practical problem that cannot prevent external loss of fluid.

Patent Document 001: Registered Patent No. 10-0816627

The present invention for solving the above-described problems is applied to a joint pipe connecting pipes for fluid movement of a fluid or chemical component in a high temperature state, so that the external loss of fluid semi-permanently without change in physical properties even in prolonged contact with a high temperature fluid or a chemical fluid. It is an object of the present invention to provide a method of manufacturing a joint pipe and a sealing member having a sealing member for connecting a pipe that can prevent this.

The present invention for achieving the above objects is a connection use of pipes that are inserted into both sides, and a first sealing ring and a second sealing ring are continuously formed at each end of the first sealing ring, and the inside of the first sealing ring is made of metal. While sealing is performed through a ring, there is a feature of a joint pipe having a sealing member for connecting a pipe in which sealing is performed through a sealing member in the inside of the second sealing ring.

The sealing member having the second sealing ring sealed therein is characterized by a joint pipe having a sealing member for connecting a pipe made of a Teflon material.

The sealing member is formed in the form of an O-ring or a tube ring, wherein the O-ring has an inner diameter formed in a horizontal surface, and an outer diameter thereof is formed between a pair of cutting surfaces in which both sides are chamfered, and between the cutting surfaces. A joint pipe having a sealing member for pipe connection that is formed in a structural shape including a horizontal surface, but is sealed in a form that occupies a wider distribution area than a metal ring compressed by compression of the first sealing ring when the second sealing ring is compressed There is a feature to work.

On the other hand, the present invention is a joint pipe that connects pipes for moving high-temperature fluids or chemical fluids by purifying raw materials collected from raw stones of fluorite (CaF2, Fluorite), processing them with powder, and then manufacturing them through compression, heat treatment, and grinding processing. There is another feature in the method of manufacturing a sealing member for pipe connection, which manufactures a sealing member that prevents external loss of high-temperature fluid or chemical fluid as it is worn.

A) the collecting step of mining the raw material of the sealing member from the raw stone of fluorite (CaF2, Fluorite), b) crushing step, in which the collected raw material is put into a pulverizer and pulverized into a powder form, and a powder form raw material is provided in the compressor C) a mold input step that is input to the molded mold, d) a compression molding step in which the raw material input to the mold is compressed through the power of a cylinder provided in the compressor, and e) a heat treatment step in which the compressed raw material is heat treated through a heat treatment machine, and There is another feature in the manufacturing method of the sealing member for pipe connection including f) grinding processing step in which the heat-treated raw material is ground through a grinding machine.

In step d), a compression member pressurized by a pressing plate configured at an end of the loader of the cylinder enters the injection hole vertically formed in the mold part, and then pressurizes and compresses the raw material filled in the injection hole, and then the mold As the base plate supporting the part from the bottom and the mold part undergoes a demolding to be separated from each other, the raw material is a different feature in the manufacturing method of the sealing member for pipe connection in which the raw material is intermediately processed into the solid material of the cylindrical member having a hollow.

In the step e), the cylindrical member having a hollow is heat treated in a gradual heating method over 24 hours at a temperature ranging from 320°C to 380°C as a temperature for heat treatment in a heat treatment machine, for connecting a pipe that is heated to 2.5°C per hour. There is another feature in the method of manufacturing the sealing member.

There is another feature of the sealing member for pipe connection manufactured by the above manufacturing methods.

The sealing member is formed in the form of an O-ring or a tube ring, but the O-ring has an inner diameter formed in a horizontal plane, and the outer diameter is formed between a pair of cutting surfaces in which both sides are chamfered, and between the cutting surfaces. Another feature is the sealing member for connecting pipes formed in a structural shape including a horizontal plane.

According to the present invention as described above, a method of manufacturing a sealing member capable of sealing airtightly at a joint pipe portion for connecting these pipes to each other when pipes used for moving high temperature fluids or chemical fluids are required, and By providing the sealing member obtained from, there is an effect of semi-permanently preventing the external loss of fluid without changing physical properties even when in contact with a high temperature fluid or a chemical fluid for a long period of time.

In addition, the sealing member manufactured by the manufacturing method of the sealing member is made of Teflon material, and exhibits excellent heat resistance, chemical resistance, and high durability even in contact with fluids having characteristics such as high temperature fluids or chemical fluids, so there is no change in physical properties. By maintaining the relationship, inconveniences such as frequent replacement of the sealing member with the existing sealing member can be solved, and even the cost incurred by frequent replacement can be remarkably reduced.

1 is a diagram showing the configuration of a joint pipe having a sealing member in three dimensions;
2 is a cross-sectional view of the joint pipe showing the sealing state of the sealing member as an internal structure of the joint pipe cut in the direction of the cut line shown in FIG. 1;
3 is a block diagram sequentially schematically illustrating process steps for a method of manufacturing a sealing member for pipe connection according to an embodiment of the present invention;
FIG. 4 is a conceptual diagram sequentially schematically illustrating mechanical devices (grinding machine, compressor, heat treatment machine, and grinding machine) involved in the process steps for the manufacturing method shown in FIG. 3;
5 is a view showing an exemplary form of a sealing member intermediately processed through a compression treatment of a compressor among the mechanical devices shown in FIG. 4;
6 is a view showing an exemplary form of a sealing member produced as a product by final processing through the grinding treatment of a grinding machine among the mechanical devices shown in FIG. 4;
7 is a view showing another exemplary form of a sealing member produced as a product by final processing through the grinding treatment of a grinding machine among the mechanical devices shown in FIG. 4;
FIG. 8 is a view showing another exemplary form of a sealing member produced as a product by final processing through a grinding treatment of a grinding machine among the mechanical devices shown in FIG. 4.

The present invention should be interpreted in a manner that includes the scope of the rights to the technical idea through various modified embodiments, only these embodiments make the posting of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the scope of the claims.

Moreover, the drawings attached to the present invention are attached as a way to help the understanding of the description of the present invention to the last, and the technical idea of the present invention should not be interpreted as being limited by the attached drawings.

The joint pipe (J) having a sealing member for pipe connection according to the present invention is used to connect pipes (P) for moving a fluid having a risk such as a high temperature fluid or a chemical fluid, as shown in Figs. 1 and 2 As, both ends may be obtained as a first sealing ring (J1) that can be sealed in a double structure and a second sealing ring (J2) formed in connection with the first sealing ring.

Particularly, the first sealing ring (J1) may be provided in a structure in which a metal ring (R) is inserted as shown in FIG. 2, and the inside of the second sealing ring (J2) is shown in FIG. As shown, it may be provided in a structure in which, for example, an O-ring 20 is inserted as a sealing member.

A first sealing ring (J1) that can be double-sealed in order to prevent loss of fluid moving along the inner moving path of the pipes (P) while the pipes (P) are inserted into the joint pipe (J). And the second sealing ring (J2) may be compressed, and the first sealing ring (J1) and the second sealing ring (J2) are also compressed with the metal ring (R) and O-ring (20) provided therein during the pressing process. As shown in Fig. 2, the loss of fluid can be double-sealed and blocked.

In particular, the O-ring 20 is sealed in a form having a wide distribution during the pressing process of the second sealing ring J2, so that the distribution area of the sealing can be secured more than that of the metal ring R.

Since the O-ring 20 is made of a Teflon material, even when it comes into contact with a high-temperature fluid or chemical fluid moving inside the pipes P, the fluid is continuously lost while maintaining its original properties without changing its original properties. Can be blocked.

Therefore, the O-ring 20 can eliminate problems such as frequent replacement of the existing rubber sealing member due to the characteristic that there is no change in physical properties even in frequent contact with the fluid, and can be used semi-permanently to block loss of fluid.

On the other hand, a detailed description of the manufacturing method of the sealing member for pipe connection according to the present invention is as follows.

The manufacturing method of the sealing member for pipe connection, as shown in Figure 3, includes a) collecting step, b) grinding step, c) mold input step, d) compression molding step, e) heat treatment step, and f) grinding processing step. It may be made in the order of processing including the process.

a) harvesting step

The above step a) is a process of collecting the raw material of the sealing member, and the so-called fluorine resin is chemically bonded to a non-flammable fluororesin belonging to the organic polymer family in the state of collecting fluorine resin from the raw stone of fluorite (CaF2 fluorite). Teflon can be obtained.

That is, the raw material of the sealing member is a non-flammable fluorine resin containing fluorine, which is a material called Teflon, and this Teflon is called by the chemical name of polytetrafluoroethylene (PTFE).

This Teflon is a nonvolatile acid fluorine resin, which reacts fluorspar (CaF2 fluorite) with sulfuric acid.For example, its chemical reaction formula may be CaF2 + H2SO4 = CaSO4 + 2HF, and impurities such as SiO2 may be generated at this time. have. Therefore, it can be obtained as a non-flammable fluororesin (PTFE) compound through a purification method of distilling after reacting with KMnO4 to make inert acid in order to remove such SiO2 impurities.

Of course, such Teflon can be made of tetrafluoroethylene (TFE) and hydrochloric acid (HCl) into a polymer-like non-flammable fluororesin, such as a polymer at a specific pressure and temperature, which is a white plastic-like material, and thus polymerized. The Teflon material is insoluble in almost all solvents, does not burn, and does not rot or decompose.

b) grinding step

The a) pulverization step is a process of pulverizing the Teflon material as a raw material of the sealing member into the size of powder particles using the pulverizer 100 shown in FIG. 4.

At this time, the Teflon material is preferably pulverized into a powder particle size having a range of 15 μm to 35 μm.When the powder particles of such a Teflon material are less than 15 μm, the cohesive force between the powder particles decreases in the compression molding step described later, which will be described later. Cracking may occur in the heat treatment step, and when the powder particles of the Teflon material exceed 35 μm, the cohesive force between the powder particles becomes too high, making it unsuitable for the use of a sealing member having a predetermined elasticity.

Therefore, the Teflon material is a joint pipe for connecting pipes used for moving a fluid in a high temperature state or a fluid in a compound state through a compression molding step and a heat treatment step described later in a powder particle size in the range of 15 μm to 35 μm. It can be used as a sealing member that maintains airtightness in the area.

c) Mold input step

The c) mold injection step is a process of introducing a powdered Teflon material into the mold part M provided in the compressor 200 shown in FIGS. 4 and 5.

That is, the powdered Teflon material is introduced into the injection hole M1 of the mold part M. In this case, the mold part M is preferably formed in a cylindrical shape, and the injection hole ( M1) has a shape of a filling hole vertically dug as shown in FIG. 3 from the center point of the cylinder to the outer diameter, that is, along the circumference of any one point outside the center point to the bottom.

Accordingly, a powdered Teflon material may be injected and filled into the injection hole M1.

d) Compression molding step

In the d) compression molding step, the powdered Teflon filled in the injection hole M1 of the mold part M is pressed and compressed at a predetermined pressure, for example, in the range of 320 to 370 Kg based on the cross-sectional area. It's fair.

That is, the Teflon powder filled in the injection hole M1 of the mold part M is transferred to the pressure plate 220 integrated at the end of the rod through the power of the cylinder 210 configured in the compressor 200 shown in FIG. 4. It can be compressed through the compression member 230 pressed by.

In other words, the pressing plate 220 vertically enters the injection hole M1 at the end of the rod transmitting the power of the cylinder 210, and fills the Teflon powder inside the injection hole M1 at a predetermined level. It is compressed by pressing with pressure.

After the Teflon powder is compressed, as the mold part (M) is lifted in a vertical upward direction from the support plate (BP) supporting the lower part of the mold part (M), the Teflon powder is compressed to remain in a solid state. do.

Here, when the pressure is less than 320 Kg, the aggregated density between the Teflon powder particles decreases, and a phenomenon in which fluid permeates through the sealing member mass-produced as a product through the twisting process step described later occurs, resulting in a decrease in the material strength of the sealing member. May result.

On the other hand, when the pressure exceeds 370 Kg, the pressure may be too high, which may cause damage to the mold part (M), and above all, the hardness of Teflon itself increases, maintaining airtightness in the joint pipe for connecting pipes. It becomes unsuitable for the use of a sealing member having a predetermined elasticity.

e) heat treatment step

In the e) heat treatment step, the Teflon compressed as a sealing member is heat treated in a state that is put into the heat treatment machine 300 shown in Fig. 4, and the temperature for the heat treatment is from 320°C to 380°C, gradually over 24 hours. It can be heat treated in a manner that is heated to At this time, the temperature is preferably raised to 2.5 ℃ per hour, the error range can be set to ±0.5 ℃.

The reason that Teflon is heat-treated in a heat treatment method ranging from 320°C to 380°C for 24 hours in the heat treatment unit 300 is to completely remove the fluorine gas contained in Teflon during the heat treatment process, and to prevent combustion. .

That is, the temperature in the heat treatment unit 300 cannot be raised from 320° C. to 380° C. to 2.5° C. per hour, and the temperature is rapidly increased to a temperature exceeding 2.5° C. or more than an hour may elapse in a state exceeding 380° C. In this case, there may be a problem that the Teflon is burned.

Therefore, in the process of heat treatment of Teflon through the heat treatment unit 300, it must be heat-treated by a heating method ranging from 320°C to 380°C for 24 hours, and heat treatment must be performed in a regular heating method at 2.5°C per hour. As harmful impurity gas contained in, fluorine gas can also be completely removed.

As such, the heat-treated Teflon can be obtained as a solid material in the form of a cylindrical member 10 having a through-shaped hollow as an intermediate work as shown in FIG. 6. Of course, Teflon that has undergone this heat treatment process can be cooled with natural wind for 24 hours.

f) Grinding processing step

In the f) grinding processing step, a solid material in the form of a cylindrical member 10 having a hollow as a heat treated Teflon is subjected to grinding processing through a grinding machine 400 shown in FIG. 4 to be an example of a sealing member, as shown in FIG. 7 f) It can be obtained in the form of, for example, an O-ring 20, which is a mass-produced product through the grinding processing step.

This O-ring 20 is a structure of its longitudinal section and forms a cutting surface 21, 22 having a chamfered shape in the left and right sides of the inner diameter while the outer diameter is horizontal, and the horizontal plane ( It can take a structural form consisting of 23).

In particular, in the longitudinal section of the O-ring 20, the structural form of the linkage between the cutting faces 21 and 22 and the horizontal face 23 is inserted into the end of the joint pipe J for pipe connection as shown in FIG. It is possible to easily perform the fitting workability of the O-ring 20, and in the future when the pipes are inserted into both sides of the joint pipe J and the both ends of the joint pipe J are crushed with a predetermined pressure, as shown in Fig. 2 Likewise, while preventing the removal of the pipes (P), the crimped O-ring (20) tightly fills the gap between the joint pipe (J) and the pipe (P), and is in close contact with the joint pipe (J) and the pipe (P). As the adhesion effect can be enhanced, the effect of preventing the loss of fluid can be excellent.

On the other hand, through the f) grinding processing step, Teflon is a structure that surrounds and surrounds the outer periphery of the silicone core (SC) as shown in FIG. 8, and may be commercialized and obtained in the form of, for example, a tube ring 30.

Although the tube ring 30 has a structure surrounding the silicone core SC, it has airtightness that prevents the loss of the fluid while fundamentally blocking the material that the silicone core SC will come into contact with the high temperature fluid or the compound fluid. It can be obtained as a product that has even the function of the secured sealing member.

In particular, since the tube ring 30 does not consume too much material of Teflon, which is a raw material, manufacturing cost incurred in processing the raw material can be significantly reduced.

As described above, the sealing member made of Teflon manufactured and commercialized by the above manufacturing method exhibits excellent heat resistance, chemical resistance, and high durability as the unique physical properties of fluorine-based polymers and can semi-permanently prevent the loss of fluid at the same time. For this reason, it may be suitable to be used for securing airtightness in the joint pipe (J) for connecting pipes used for the purpose of moving high-temperature fluids or compound fluids in particular.

As an example of such a sealing member, for example, the O-ring 20 shown in Fig. 7 is a structure of its longitudinal section, and forms cutting surfaces 21 and 22 having a chamfered shape in which the inner diameter is horizontal but the outer diameter is left and right. Between the surfaces 21 and 22 may take a structural form consisting of a horizontal surface 23.

In particular, in the longitudinal section of the O-ring 20, the structural form of the linkage between the cutting faces 21 and 22 and the horizontal face 23 is inserted into the end of the joint pipe J for pipe connection as shown in FIG. It is possible to easily perform the fitting workability of the O-ring 20, and in the future when the pipes are inserted into both sides of the joint pipe J and the both ends of the joint pipe J are crushed with a predetermined pressure, as shown in Fig. 2 Likewise, while preventing the removal of the pipes (P), the compressed O-rings (20) airtightly fill the gap between the joint pipes (J) and the pipes (P), and are in close contact with the joint pipes (J) and the pipes (P). As the adhesion effect can be enhanced, the effect of preventing the loss of fluid can be excellent.

The sealing member made of such a Teflon material can be compared with the properties of the hydrocarbon-based PE, which can be referred to in Table 1 below.

Property Sealing member (PTFE) PE Chemical structure -(CF ₂ CF ₂ ) _n- -(CH ₂ CH ₂ ) _n- Melting temperature (℃) 342(first), 327(second) 105-140 Refractive index 135 151 Chain branching propensity No Yes Melt viscosity (Poise) 10 ¹⁰ -10 ¹² 10 ⁴ -6×10 ⁴ Activation energy of thermal degradation (KJ/mol) 339 264 Surface energy (mN/m) 18 33 Density 2.2-2.3 0.92-1 Dynamic coefficient of friction 0.04 0.33 Dielectric constant (1kHz) 2.0 2.3 Resistance to solvents and chemicals No known solvent Hot hydrocarbons

As can be seen from Table 1, the sealing member (PTFE) is particularly airtightly worn on the joint pipe for connecting pipes that move high-temperature fluid or chemical fluid to prevent loss of fluid that may leak through the clearance gap between the pipe and the joint pipe. It is suitable for the purpose of preventing, and furthermore, it exhibits excellent heat resistance, chemical resistance, and high durability even through contact with these fluids, so that it can be used semi-permanently as a sealing member for preventing loss.

Piping (P) Joint pipe (J)
Cylindrical member (10) O-ring (20)
Tube Ring(30)
Crusher(100) Compressor(200)
Heat treatment machine (300) Grinding machine (400)

Claims (9)

delete delete delete delete delete delete As the raw material collected from the raw stone of fluorite (CaF2, Fluorite) is refined and powdered, it is manufactured through compression, heat treatment, and grinding, and is worn on the joint pipe connecting the pipes for moving high temperature fluids or chemical fluids To manufacture a sealing member that prevents external loss of high-temperature fluid or chemical fluid,
A) collecting step of mining the raw material of the sealing member from the raw stone of fluorite (CaF2 螢石, Fluorite); B) a pulverizing step in which the collected raw material is put into a pulverizer and pulverized into a powder form; C) a mold input step in which the raw material in the form of a powder is injected into a mold provided in the compressor; D) compression molding step in which the raw material input to the mold is compressed through the power of a cylinder provided in the compressor; E) heat treatment step in which the compressed raw material is heat treated through a heat treatment machine; And f) grinding processing step of grinding the heat-treated raw material through a grinding machine. Including,
In step d), a compression member pressurized by a pressurizing plate configured at an end of the loader of the cylinder enters the injection hole vertically formed in the mold part, and pressurizes the raw material filled in the injection hole, and then pressurizes the mold. As the base plate supporting the part at the bottom and the mold part go through the demolding to be separated from each other, the raw material is intermediately processed into the solid material of the cylindrical member having a hollow,
In step e),
The cylindrical member having a hollow is a temperature for heat treatment in a heat treatment machine and is heat-treated in a gradual heating method over 24 hours at a temperature ranging from 320°C to 380°C, and the temperature is increased to 2.5°C per hour. Method of manufacturing. delete delete

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