KR20100087489A - An inward form regulator - Google Patents

Abstract

PURPOSE: An embedded regulator is provided to streamline assembly processes and reduce time by integrating a systone and a solenoid valve in order to reduce the volume thereof. CONSTITUTION: An embedded regulator comprises a housing(110), a valve shaft(120), a solenoid valve(500), a systone(130), a cap(150), and a reduction unit(100). An orifice is formed in the housing. The valve shaft is coupled with the orifice. The solenoid valve blocks an input port(112). The systone contacts one end of the valve shaft and enables tip movement. The systone is integrated with the solenoid valve blocking the input port. The cap is coupled with the housing in order to surround the end wherein the systone is installed. The reduction unit comprises a spring(150) combined between the systone and the cap. The housing comprises an air port(180) to connect to the upper end of the systone.

Description

Built-in regulator {AN INWARD FORM REGULATOR}

The present invention relates to a built-in regulator, and relates to a built-in regulator that can reduce the volume and volume of the component by arranging a systone formed integrally with the seat, and forming a solenoid and a regulator to open and close the cystone and the input port integrally. will be.

In general, gas-based fuel devices include fuel cells that use oxygen and hydrogen as fuels, compressed natural gas (CNG) fuel, liquefied petroleum gas (LPG) fuel, di-methyl-ether (DME) fuel, and methane gas. There are a vehicle and a plurality of fuel apparatuses using the lamp as a fuel.

A fuel cell, which is an example of a fuel device using gaseous fuel as a medium, generates electricity electrochemically in a stack using oxygen and hydrogen, that is, directly converts chemical energy of a fuel into electrical energy.

More specifically, fuel and air can be supplied externally and continue to generate power regardless of the capacity of the battery, making it an ideal power generation system with high efficiency and few pollutants.

As a result, many automakers and parts companies are currently working on developing automobiles using gas-based fuel systems, and many attempts have been made.

Such a vehicle to which the fuel cell is applied should supply electricity to the fuel cell, supply hydrogen to the anode of the fuel cell, and supply air to the cathode to obtain energy required for driving the vehicle.

As described above, in the fuel apparatus using gas as a medium, a regulator for adjusting the pressure of the compressed gas to a predetermined pressure is provided.

1 is a view schematically showing a general compressed natural gas vehicle. As shown in FIG. 1, the compressed natural gas vehicle includes a cylinder 21 in which compressed natural gas is stored, a fuel supply line 23 connecting the cylinder 21 and the engine 22, and the fuel supply line 23. And a regulator (24) installed at the pressure gauge to reduce the compressed natural gas, and a mixer (24) which mixes the compressed natural gas and the intake air reduced in pressure by the regulator (A) and supplies it to the engine.

In addition, the cylinder 21 is stored in the compressed natural gas at a pressure of approximately 350Bar, the compressed natural gas is maintained at approximately 2 ~ 5Bar at 350Bar while passing through the regulator (A) before being supplied to the engine 22 To reduce the pressure.

In addition, the mixer 24 is provided with an air cleaner 25 to remove foreign substances in the intake air, the foreign matters that are hindered in the combustion of the engine 22 by the air cleaner 25 is removed to prevent engine relief. do.

Here, the engine 22, regulator A, mixer 24, and air cleaner 25 are controlled by a main control device such as an ECU.

Accordingly, the mixer in which the compressed natural gas and the intake air are combined by the mixer 24 is injected into each combustion chamber of the engine 22 to perform combustion, and the harmful exhaust gas generated by the combustion is discharged to the outside.

Here, the gas pressure reducing regulator (A) is a device for reducing the high pressure gas pressure formed on the inlet side to a predetermined pressure and supplying it to the outlet side, and a conventional gas pressure reducing regulator performs only one-stage pressure reduction. Korean Utility Model Registration No. 0289663.

Referring to FIG. 2, the configuration of the conventional regulator 10 includes a gas supply port 6 through which gas is supplied from a control valve, a diaphragm 7 that expands and contracts according to inflow and outflow of gas, A pressure regulating screw 8a for adjusting the flow rate of the gas, a balance spring 8 for pressing the diaphragm 7, and a valve 6a installed at the gas supply port 6 when the diaphragm 7 is lowered. It comprises a lever (9) for opening and closing the.

First, when the high-pressure fuel is introduced into the interior through the valve 6a provided at the end of the gas supply port 6, the pressure in the decompression chamber is increased, and the diaphragm 7 is raised upward.

In this case, the balance spring 8 installed on the upper surface of the diaphragm 7 is contracted, and the main spring 9a mounted at the lower part of the lever 9 is expanded while the valve formed at the upper portion of the gas supply port 6 ( 6a) is closed to cut off the gas supply.

The gas thus decompressed is discharged through the gas discharge port 10a formed at one side, and the diaphragm 7 is lowered by the elasticity of the balance spring 8 to operate the lever 9 downward to operate the gas supply port 6. The gas starts to be supplied again by opening the valve 6a.

In this manner, the high pressure fuel is reduced to the next stage through the repeated opening and closing of the valve 6a and mixed with air.

However, when the regulator of the prior art as described above is installed in a fuel cell vehicle, there is a problem that it is difficult to sufficiently supply hydrogen gas during high-speed driving of the vehicle.

That is, when high-pressure hydrogen gas flows into the gas supply part 6, the diaphragm 7 rises, and the valve 6a closes the gas supply part 6 to serve only as a decompression function, but is sufficient for high-speed driving. It is difficult to supply a positive amount of hydrogen gas, and thus it is not easy to provide a constant pressure in a state of high load and high power.

Therefore, a typical representative high pressure gas regulator capable of providing a gas compressed at high pressure to natural gas and other gas vehicles is as follows.

First, U.S. Patent No. 6,629,544 (Prior Art 1) discloses a normal close type regulator, and the regulator according to the prior art 1 has a reaction force of a diaphragm and an elastic body (coil spring) having a high inlet pressure. This structure is designed to reduce the pressure at a constant pressure.

And, the reaction force of the elastic body is to be adjusted by a separate mechanism for adjusting the force of the spring. In this case, when the pressure is higher than the required outlet pressure, the orifice portion is closed, and when it is low, the orifice portion is opened to show the pressure compensation.

In addition, U. S. Patent No. 5,890, 512 (Prior Art 2) also discloses a normally closed regulator similar to the prior art 1, which differs from the prior art 1 in that a spring (elastic material) acting on the valve stem also at the inlet side. There is a hot water aisle is provided separately.

In addition, U. S. Patent 678,712 (Prior Art 3) also discloses a normally closed regulator, in which a disc spring is employed as a spring acting as a reaction force against the inlet pressure, and the pressure reducing section and the spring chamber are used instead of the diaphragm. It consists of a sliding part capable of axial movement.

On the other hand, U.S. Patent No. 6,321,779 (Prior Art 4) discloses a structure of a regulator of a normal open type, in which a reduced inlet pressure acts as a pressure on an outlet upper end surface to close an orifice valve part. It has the principle of depressurizing to a certain pressure.

Here, an elastic body capable of compensating even if the inlet pressure is high or low and an outlet pressure holding unit for maintaining the outlet pressure at a constant pressure are provided, and a disk spring is adopted as the elastic body to be applied.

However, the regulator according to the prior art is not installed in the fuel tank, so the stability of the high-pressure line fuel cell vehicle is not guaranteed, and the solenoid valve for blocking and connecting with the tank is mounted on the outside of the regulator, whereby the regulator's volume and volume There was a problem such as increasing.

The present invention has been made in order to solve the above problems, it is equipped with a built-in regulator in the fuel tank, the piston and the seat portion integrally formed, the regulator and the solenoid valve integrally formed to reduce the volume and volume It is an object of the present invention to provide a built-in regulator.

 In order to achieve the above object, the present invention provides a built-in regulator for reducing the fuel introduced into the input port to discharge to the output port, the housing is formed with an orifice; A valve shaft coupled with the orifice; A solenoid valve blocking the input port; A seastone integrally formed with the solenoid valve blocking the input port by performing tip motion by contacting one end of the valve shaft; A cap coupled to the housing to surround an end portion of the seastone; It characterized in that it comprises a decompression unit consisting of a spring coupled between the seastone and the cap.

The decompression unit may further include a hot water port and a hot water flow path provided at an input port and an output port, respectively, to the outside of the housing.

In addition, the housing is characterized in that the air port is further formed to communicate with the top of the seastone.

The pressure reducing unit may further include a shut off valve.

The pressure reducing unit further includes a pressure sensor.

In addition, the decompression unit is characterized in that it further comprises a relief valve.

The input port may further include a manual valve for manually operating the solenoid valve.

The decompression unit may further include a bleed valve for removing residual fuel in the tank.

The pressure reducing part may further include a PRV valve and a PRD valve.

Preferably, the decompression unit further comprises a high pressure sensor for detecting a high pressure gas pressure and a low pressure sensor for detecting a low pressure gas pressure.

As described above, the present invention having the configuration as described above affects the depressurization operation of the cystone even if icing due to the inflow of the high pressure gas is generated by changing the diaphragm of the rubber material in the depressurization portion to the metal cystone. At the same time, the stability of the machine can be increased, and the cystone and the solenoid valve can be integrally formed to reduce the volume and volume, and to reduce the assembly time and the time.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view illustrating a built-in regulator according to the present invention, FIG. 4 is an enlarged view of an enlarged portion of the seastone of FIG. 3, and FIG. 5 is a perspective view of the built-in regulator according to the present invention.

As shown in Figure 3 to 5, the built-in regulator according to the present invention is composed of a pressure reducing unit 100 for reducing the gas, the pressure reducing unit 100 is formed integrally with the solenoid valve 500.

Here, the decompression unit 100 has a housing 110 in which an orifice is formed, the valve shaft 120 coupled to the orifice, and the seastone 130 that comes into contact with one end of the valve shaft 120 to perform a tip motion. The cap 140 is coupled to the housing 110 so as to cover an end portion at which the cystone 130 is installed, and the spring 150 is coupled between the cystone 130 and the cap 140.

In this case, the seastone 130 is formed integrally with the sheet 222, and the sheet 222 is fixed with a heat insulating material that surrounds the passage through which gas is introduced so that ice does not occur in the regulator.

Here, the seastone 130 is defined as a compound word meaning a piston formed integrally with the seat 222, the seat 222 to be in contact with the tapered portion of the valve shaft 120 in the seastone 130. It is formed integrally with the seastone 130.

In addition, the housing 110 includes an input port 112 through which gas is introduced and an output port 212 through which the reduced pressure gas is discharged, and a filter (not shown) is attached to the input port 112 so that It may be provided to filter foreign matters and the like, and to prevent engine relief.

In addition, the seastone 130 is further provided with a rubber O-ring 131 to prevent the leakage of gas.

In addition, a flow path is formed in the housing 110 so as to communicate with the orifice, and a stopper is formed between the flow path and the seastone 130 to prevent the inflow path from being blocked by the seastone 130.

That is, the flow path and the orifice are composed of an open flow path that is open.

In addition, the housing 110 is provided with an output port 212 communicating with the flow path to output the reduced pressure gas.

Preferably, the decompression unit 100 may further include a hot water port and a hot water flow path to surround the output port 212, to prevent icing through the hot water flow path, and the hot water port may include a housing ( The outside of the 110 may be provided at the inlet and outlet, respectively.

For example, when the pressure is reduced through the decompression unit 100, a sudden temperature decrease occurs due to the characteristics of the gas, which is prevented by the hot water port and the hot water flow path, and the hot water circulating the hot water port and the hot water flow path usually prevents engine deterioration. Use coolant.

On the other hand, the housing 110 has an air port 180 is formed in communication with the top of the seastone 130, the air port 180 is a CNG vehicle or rapid acceleration or full throttle to which the regulator of the present invention is applied It is used when the flow rate of air is increased.

That is, when the flow rate of air is increased, when the increased flow rate of air is injected into the air port 180, the seastone 130 and the solenoid valve 500 moves to the lower end, and thus the orifice is opened to open the gas. In order to increase the flow rate of the gas, the flow rate of the gas is also adjusted in proportion to the flow rate of the air.

And, the cap 140 is provided with adjustment screws, respectively, to adjust the elastic force of the spring 150 to fine-tune the flow rate of the gas.

Here, the decompression unit 100 is further provided with a shut-off valve (not shown) to control the inflow of gas, it is preferable that the shut-off valve is typically used a solenoid valve.

In addition, the pressure reducing unit 100 may be further provided with a pressure sensor for measuring the pressure of the gas flowing into the input port 112, the pressure reducing unit 100 is to increase the pressure of the gas above the set pressure. In this case, a relief valve for discharging gas may be further provided to prevent damage to the built-in regulator of the present invention.

Since the shut-off valve for intermitting the inflow of gas, the pressure sensor for measuring the pressure of the gas, and the relief valve for discharging when the gas is higher than the set pressure are already used in the related art, a detailed description of the internal structure and operation thereof Is omitted.

In addition, the cystone 130 according to the present invention is formed of a metal material such as aluminum, unlike the rubber diaphragm according to the prior art icing occurs at a low temperature, the rubber diaphragm is broken Unlike this, it is made to withstand high pressure and low temperature.

In addition, the decompression unit 100 installs the solenoid valve 500 to serve to block the gas when the high-pressure gas flowing from the input port 112 flows into the excessive input.

In addition, the bottom of the pressure reducing unit 100 may be further provided with a manual valve for blocking the passage of the input port 112 by manual operation when the solenoid valve 500 is not normally operated, the pressure of the pressure reducing unit 100 A low pressure sensor for detecting the high pressure sensor to detect the pressure of the decompression unit 100 is also installed on one side of the low pressure sensor.

In addition, the pressure reducing unit 100 is provided with a temperature sensor for measuring the tank temperature, when filling the fuel tank, the check valve (not shown) is coupled to one side of the solenoid valve 500 so that the fuel does not flow back Inlet holes (not shown) are also formed.

In addition, a sealing body cap is coupled to the lower surface of the pressure reducing part 100, and a PRV valve (Pressure Relief Valve), which is a pressure reducing valve, and a PRD valve (Pressure Relief Device), which is a safety valve, are installed.

When the depressurized fuel flows to a pressure higher than the appropriate pressure, the PRV valve discharges the fuel to the outside to reduce the fuel pressure, and the PRD valve discharges the fuel so that the vehicle is protected in the event of a fire.

In addition, a bleed valve for removing residual fuel in a fuel tank is installed, and a PRV / PRD vent port connected to the PRV valve and the PRD valve is installed to supply fuel to the PRV / PRD vent from the PRV valve and the PRD valve. Ejected through the port, such a configuration and operating principles are disclosed in the applicant's patent application No. 2007-0111255, detailed description thereof will be omitted.

Hereinafter, an operation process of the above-described built-in regulator will be described.

First, when a high-pressure gas flows into the input port 112 and is guided to the orifice side, the gas passing through the orifice presses the seastone 130 and moves the seastone 130 to the upper end, whereby the opening amount of the orifice is increased. The valve is reduced to reduce pressure.

At this time, in the case of natural gas fuel, the pressure is reduced to 7 ~ 8bar at 350bar, the gas is output to the output port 212 through the flow path is reduced, even if the fluctuation amount of the gas pressure on the input port 112 side, Since the fluctuation amount can be minimized through the pass passage, the gas can be stably output to the output port 212.

In addition, since the decompression unit 100 for decompressing the high-pressure gas is formed of a metal material, the cystone 130 is configured so that the operation of the cystone 130 is unreasonable even if icing occurs according to the high-pressure gas temperature. do.

In addition, according to the present invention, as the solenoid valve 500 is integrally formed with the regulator on the lower surface of the sistone 130, the input port 112 may be blocked as necessary, and the existing port is installed in the tank. Valve springs and components for mounting them can be eliminated and made to reduce assembly labor and volume.

In the above described exemplary embodiments of the present invention by way of example, the scope of the present invention is not limited only to this specific embodiment, and those skilled in the art within the scope of the claims of the present invention Changes may be made as appropriate.

1 is a view schematically showing a typical compressed natural gas vehicle.

2 is a cross-sectional view schematically showing a regulator according to the prior art.

3 is a sectional view showing a built-in regulator according to the present invention.

4 is an enlarged view illustrating an enlarged portion of the systone of FIG. 3;

4 is a perspective view showing a built-in regulator according to the present invention.

<Brief description of reference numerals for the main parts of the drawings>

100: pressure reduction portion 111: orifice

113: euro 120: valve shaft

121: valve 130: seastone

131: O-ring 140: cap

150: spring

Claims (10)

In the built-in regulator for reducing the fuel flowing into the input port to discharge to the output port, A housing in which an orifice is formed; A valve shaft coupled with the orifice; A solenoid valve blocking the input port; A seastone integrally formed with the solenoid valve blocking the input port by performing tip motion by contacting one end of the valve shaft; A cap coupled to the housing to surround an end portion of the seastone; Built-in regulator characterized in that it comprises a decompression unit consisting of a spring coupled between the cystone and the cap. The method of claim 1, The decompression unit And a hot water port and a hot water flow path provided on the input port and the output port, respectively, to the outside of the housing. The method of claim 1, The housing is And an air port to communicate with an upper end of the seastone. The method according to any one of claims 1 to 3, The pressure reducing unit is a built-in regulator, characterized in that further provided with a shut off valve. The method according to any one of claims 1 to 3, The pressure reducing unit is a built-in regulator, characterized in that further provided with a pressure sensor. The method according to any one of claims 1 to 3, The pressure reducing unit is a built-in regulator, characterized in that further provided with a relief valve. The method of claim 1, The input port is And a manual valve for manually operating the solenoid valve. The method of claim 1, The decompression unit And a bleed valve for removing residual fuel in the tank. The method of claim 1, The pressure reducing unit further includes a PRV valve, a PRD valve. The method of claim 1, The decompression unit And a low pressure sensor for detecting a gas pressure at a low pressure and a high pressure sensor for detecting a gas pressure at a high pressure.

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