KR20130065088A - Fuel filter for compressed natural gas vehicle - Google Patents

Fuel filter for compressed natural gas vehicle Download PDF

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Publication number
KR20130065088A
KR20130065088A KR1020110131799A KR20110131799A KR20130065088A KR 20130065088 A KR20130065088 A KR 20130065088A KR 1020110131799 A KR1020110131799 A KR 1020110131799A KR 20110131799 A KR20110131799 A KR 20110131799A KR 20130065088 A KR20130065088 A KR 20130065088A
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South Korea
Prior art keywords
screw portion
natural gas
male screw
ring
filter
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KR1020110131799A
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Korean (ko)
Inventor
김종인
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주식회사 대흥정공
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Priority to KR1020110131799A priority Critical patent/KR20130065088A/en
Publication of KR20130065088A publication Critical patent/KR20130065088A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2271/02—Gaskets, sealings
    • B01D2271/027—Radial sealings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Abstract

PURPOSE: A fuel filter for a natural gas vehicle is provided to prevent the deterioration of binding power due to vibration by fixing a body and a top cover by the double screw-coupling. CONSTITUTION: A fuel filter for a natural gas vehicle includes a body(210), a drain valve(220), a filter pipe(230), a guide pipe(240), a top cover(250), a first O-ring(260), a second O-ring(270), and a lower cover(280). The body has a first male screw part(211) on the upper end external circumference surface. The drain valve is installed to be separated and coupled at the lower surface of body. The filter pipe is built in the body and separates a foreign substance included in the natural gas. The guide pipe is installed in the filter pipe so as to induce the natural gas to the central portion of the filter pipe. The top cover has a first female screw part, which is screw-coupled to the first male screw, at the lower inner side circumference surface, has a second male screw part(254) at the lower outer side circumference surface, and has a supplying hole and a discharging hole(253) at the upper portion thereof. The first O-ring is installed so as to maintain the air tightness between the upper surface of body and the lower surface of top cover. The second O-ring is installed so as to maintain the air tightness between the external circumference surface of the body and the internal circumference surface of the top cover. The lower cover includes a second female screw part(281), which is screw-coupled to the second male screw part, on the internal circumference surface thereof.

Description

천연가스 자동차용 연료필터{Fuel filter for compressed natural gas　vehicle}Fuel filter for natural gas vehicles {Fuel filter for compressed natural gas vehicle}

본 발명은 천연가스 자동차용 연료필터에 관한 것으로서, 더욱 상세하게는 차량 주행중 발생되는 진동에 의해서 연료필터의 기밀이 감소되는 것을 방지하여 가스의 누출로 인한 안전사고를 미연에 방지할 수 있는 천연가스 자동차용 연료필터에 관한 것이다.The present invention relates to a fuel filter for a natural gas vehicle, and more particularly, to prevent the gas filter from being tightly sealed due to vibration generated while driving a vehicle, thereby preventing natural accidents caused by gas leakage. It relates to a fuel filter for automobiles.

일반적으로 압축천연가스(Compressed Natural Gas : CNG)는 가정 및 공장 등에서 사용되는 도시가스를 자동차 연료로 사용하기 위하여 약 200기압으로 압축한 것을 말하며, 이러한 압축천연가스는 고압의 압축된 기체(비중 : 0.61)로 공기(비중 : 1)보다 가볍고 누출되어도 쉽게 확산 되며, 휘발유, 경유, LPG에 비하여 안전한 연료로 평가 받고 있다.In general, compressed natural gas (CNG) refers to a compressed gas at about 200 atmospheres for use as a fuel for automobiles, which are used in homes and factories, and such compressed natural gas is a high-pressure compressed gas. 0.61), lighter than air (specific gravity: 1) and easily spread even if leaked, and is considered to be a safer fuel than gasoline, diesel, and LPG.

또한, 가솔린과 비교하면 착화점은 거의 같지만 저 발열량과 옥탄가가 약간 높으며, 가솔린 엔진의 연료로서 매우 적합하며 가격이 싸기 때문에 영업용 택시나, 트럭, 버스 등 영업차의 연료로 널리 보급되어 사용되고 있다.In addition, compared to gasoline, the ignition point is almost the same, but low calorific value and slightly higher octane number, and is very suitable as a fuel for gasoline engine, and because the price is low, it is widely used as fuel of commercial vehicles such as taxis, trucks and buses.

이와 같은 CNG 차량은 가스 충전구에 의해 다수의 봄베 내부에 연료를 충전시키게 되며, 충전시에는 충전소의 압축기를 이용하여 고압으로 연료를 충전시키게 되고, 충전 후 주행 중 엔진으로 공급되는 연료는 저속으로 공급되도록 구성되어 있다.Such a CNG vehicle uses a gas filling port to fill fuel in a plurality of cylinders, and when charging, the fuel is charged at high pressure by using a compressor of a charging station. It is configured to be supplied.

한편, 상기 천연가스가 엔진으로 공급되는 공급라인에는 천연가스에 포함된 이물질을 분리하기 위한 연료필터가 설치되어 있는바, 종래의 연료필터(100)는 도 1에 나타낸 바와 같이 외형을 형성하는 몸체(110)가 마련되어 있되, 상기 몸체(110)의 상부 외측 둘레면에는 숫나사부(111)가 형성되어 있고, 상기 몸체(110)의 저면에는 이물질을 외부로 배출시키기 위한 드레인 밸브(120)가 분리/결합 가능하도록 결합되어 있다.On the other hand, the supply line for supplying the natural gas to the engine is provided with a fuel filter for separating the foreign matter contained in the natural gas, the conventional fuel filter 100 as shown in Figure 1 the body forming the appearance 110 is provided, but the male threaded portion 111 is formed on the upper outer peripheral surface of the body 110, the drain valve 120 for discharging the foreign matter to the bottom of the body 110 is separated / Combined to be combinable.

상기 몸체(110)의 내부에는 천연가스에 포함된 이물질을 분리하기 위한 필터관(130)이 내장되어 있고, 상기 필터관(130)의 내부에는 천연가스를 필터관(130)의 중앙부로 유도하기 위한 유도관(140)이 설치되어 있다.The inside of the body 110 has a filter tube 130 for separating the foreign matter contained in the natural gas is built, the inside of the filter tube 130 to guide the natural gas to the central portion of the filter tube 130 Induction pipe 140 for is installed.

그리고, 상기 몸체(110)의 상단에는 상부커버(150)가 설치되어 있되, 상기 상부커버(150)의 하단 내측 둘레면에는 숫나사부(111)와 나사 결합되는 암나사부(151)가 형성되어 있는 것으로서, 상기 몸체(110)와 상부커버(150)는 나사 결합에 의해 결합되는 것이다.In addition, an upper cover 150 is installed at an upper end of the body 110, and a female screw part 151 is screwed to a male thread part 111 on a lower inner circumferential surface of the upper cover 150. As the body 110 and the upper cover 150 is to be coupled by screw coupling.

또한 상기 몸체(110)의 상면과 상부커버(150)의 저면 사이에는 기밀을 유지하기 위한 오링(160)이 설치되어 있다.In addition, an O-ring 160 is installed between the upper surface of the body 110 and the lower surface of the upper cover 150 to maintain airtightness.

상기 상부커버(150)에는 천연가스가 공급되는 공급관(190)을 결합하기 위한 공급공(152)과, 필터관(130)을 통과하면서 이물질이 분리된 천연가스가 배출되는 배출관(191)을 결합하기 위한 배출공(153)이 형성되어 있다.The upper cover 150 is coupled to the supply hole 152 for coupling the supply pipe 190 for supplying natural gas, and the discharge pipe 191 through which the natural gas from which foreign substances are separated while passing through the filter tube 130 is discharged. The discharge hole 153 is formed to.

이와 같이 구성된 종래의 연료필터(100)는 차량에 장착되는 것이며, 상기 차량 주행중 발생되는 진동은 연료필터(100)에 전달되는 것이다.The conventional fuel filter 100 configured as described above is mounted on a vehicle, and the vibration generated while driving the vehicle is transmitted to the fuel filter 100.

따라서, 장기간 사용시 연료필터(100)에 전달되는 진동으로 인하여 나사 결합되어 있는 몸체(110)와 상부커버(150)의 결합력이 감소되었으며, 이로 인하여 오링(160)의 접촉력이 감소되어 상기 몸체(110)와 상부커버(150)의 사이로 천연가스가 유출되는 등의 문제점이 있었다.Therefore, due to the vibration transmitted to the fuel filter 100 in a long time use, the coupling force between the body 110 and the upper cover 150, which is screwed together, is reduced, and thus the contact force of the O-ring 160 is reduced, thereby reducing the body 110. And natural gas flows out between the upper cover 150 and the upper cover 150.

또한, 종래의 연료필터(100)의 기밀을 유지하기 위한 오링(160)은 몸체(110)의 상면과 상부커버(150)의 저면 사이에만 설치되어 있으므로, 탄성이 상,하로만 작용되어 오히려 몸체(110)의 상면과 상부커버(150)를 밀어내는 작용을 하게 되므로 기밀을 유지하는데 어려움이 있었다.In addition, the O-ring 160 for maintaining the airtight of the conventional fuel filter 100 is installed only between the upper surface of the body 110 and the bottom surface of the upper cover 150, the elasticity is only acted up and down, rather the body Since the upper surface and the upper cover 150 of the 110 is acting to push, there was a difficulty in maintaining airtightness.

본 발명은 상기한 문제점을 해결하기 위하여 발명한 것으로서, 그 목적은 몸체와 상부커버를 이중의 나사 결합에 의해서 고정하여 진동에 의한 결합력 감소를 방지함은 물론, 몸체와 상부커버의 상하면 및 측면에 기밀을 유지하기 위한 오링을 각각 설치하여 기밀력을 향상시킬 수 있는 천연가스 자동차용 연료필터를 제공함에 있다.The present invention has been invented to solve the above problems, the object of which is to fix the body and the top cover by a double screw coupling to prevent the reduction of the coupling force due to vibration, as well as on the upper and lower sides and sides of the body and the top cover It is to provide a fuel filter for natural gas vehicles that can improve the air tightness by installing each O-ring to maintain the airtight.

상기 목적을 해결하기 위한 본 발명의 특징적인 구성은 외형을 형성하고, 상단 외측 둘레면에는 제1숫나사부가 형성된 몸체; 상기 몸체의 저면에 분리/결합 가능하게 설치된 드레인 밸브; 상기 몸체에 내장되어 천연가스에 포함된 이물질을 분리하는 필터관; 상기 필터관의 중앙부로 천연가스를 유도하도록 필터관의 내부에 설치된 유도관; 상기 제1숫나사부와 나사결합되는 제1암나사부가 하부 내측 둘레면에 형성되고, 하부 외측 둘레면에는 제2숫나사부가 형성되며, 상부에는 공급공 및 배출공이 형성된 상부커버; 상기 몸체의 상면과 상부커버의 저면 사이에는 기밀을 유지하도록 설치된 제1오링; 상기 몸체의 외측 둘레면과 상부커버의 내측 둘레면 사이에 기밀을 유지하도록 설치된 제2오링; 상기 제2숫나사부에 나사 결합되는 제2암나사부가 내측 둘레면에 형성된 하부커버를 포함하여서 된 것이다.A characteristic configuration of the present invention for solving the above object is to form an outer shape, the upper outer peripheral surface formed with a first male screw portion; A drain valve detachably installed at a bottom of the body; A filter tube embedded in the body to separate foreign substances contained in natural gas; An induction pipe installed inside the filter pipe to guide natural gas to the center of the filter pipe; An upper cover having a first female screw portion screwed to the first male screw portion on a lower inner circumferential surface, a second male screw portion on a lower outer circumferential surface, and a supply hole and a discharge hole formed on an upper portion thereof; A first O-ring installed between the upper surface of the body and the lower surface of the upper cover to maintain airtightness; A second O-ring installed to maintain airtightness between the outer circumferential surface of the body and the inner circumferential surface of the upper cover; The second female screw portion screwed to the second male screw portion is to include a lower cover formed on the inner peripheral surface.

또한 본 발명에 있어서, 상기 제1숫나사부와 제1암나사부의 피치간격과 제2숫나사부와 제2암나사부의 피치간격은 서로 다른 간격으로 형성된 것이다.In the present invention, the pitch spacing of the first male screw portion and the first female screw portion and the pitch spacing of the second male screw portion and the second female screw portion are formed at different intervals.

또한 본 발명에 있어서, 상기 제1숫나사부와 제1암나사부의 피치방향과 제2숫나사부와 제2암나사부의 피치방향은 서로 다른 방향으로 형성된 것이다.In the present invention, the pitch direction of the first male screw portion and the first female screw portion and the pitch direction of the second male screw portion and the second female screw portion are formed in different directions.

이와 같이 본 발명은 몸체와 상부커버를 이중의 나사 결합에 의해서 고정하여 진동에 의한 결합력 감소를 방지함은 물론, 몸체와 상부커버의 상,하면으로의 탄성과 측면으로 탄성이 작용 되는 기밀을 유지하기 위한 오링을 각각 설치하여 기밀을 향상시켜 가스 누출을 미연에 방지할 수 있는 특유의 효과가 있다.As described above, the present invention fixes the body and the upper cover by double screw coupling to prevent the reduction of the coupling force due to vibration, as well as maintaining the air tightness and elasticity of the upper and lower surfaces of the body and the upper cover. O-rings to install each to improve the airtight has a unique effect that can prevent gas leakage in advance.

도 1은 종래의 연료필터를 나타낸 결합상태 단면도.
도 2는 본 발명에 따른 연료필터를 나타낸 분해 사시도.
도 3은 본 발명에 따른 연료필터를 나타낸 결합상태 단면도.1 is a cross-sectional view illustrating a conventional fuel filter.
Figure 2 is an exploded perspective view showing a fuel filter according to the present invention.
Figure 3 is a cross-sectional view showing a combined state of the fuel filter according to the present invention.

이하 본 발명의 실시 예를 첨부된 도면을 참조해서 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 연료필터를 나타낸 분해 사시도이고, 도 3은 본 발명에 따른 연료필터를 나타낸 결합상태 단면도이다.2 is an exploded perspective view showing a fuel filter according to the present invention, Figure 3 is a cross-sectional view of the coupling state showing a fuel filter according to the present invention.

여기에서 참조되는 바와 같이 본 발명에 따른 연료필터(200)는 외형을 형성하는 몸체(210)가 마련되어 있되, 상기 몸체(210)의 상부 외측 둘레면에는 제1숫나사부(211)가 형성되어 있고, 제1숫나사부(211)의 하단에는 걸림턱(212)이 형성되어 있으며, 상기 몸체(210)의 저면에는 이물질을 외부로 배출시키기 위한 드레인 밸브(220)가 분리/결합 가능하도록 결합되어 있다.As referred to herein, the fuel filter 200 according to the present invention is provided with a body 210 forming an outer shape, and a first male screw portion 211 is formed on the upper outer circumferential surface of the body 210. A locking jaw 212 is formed at a lower end of the first male screw portion 211, and a drain valve 220 for discharging foreign substances to the outside is coupled to the bottom of the body 210 so as to be detachable / combined. .

상기 몸체(210)의 내부에는 천연가스에 포함된 이물질을 분리하기 위한 필터관(230)이 내장되어 있고, 상기 필터관(230)의 내부에는 천연가스를 필터관(230)의 중앙부로 유도하기 위한 유도관(240)이 설치되어 있다.The inside of the body 210 is a filter tube 230 for separating the foreign matter contained in the natural gas is built, the inside of the filter tube 230 to guide the natural gas to the central portion of the filter tube 230 Induction pipe 240 for is installed.

그리고, 상기 몸체(210)의 상단에는 상부커버(250)가 설치되어 있되, 상기 상부커버(250)의 하단 내측 둘레면에는 제1숫나사부(211)와 나사 결합되는 제1암나사부(251)가 형성되어 있고, 하단 외측 둘레면에는 제2숫나사부(254)가 형성되어 있는 것으로서, 상기 몸체(210)와 상부커버(250)는 제1숫나사부(211)와 제1암나사부(251)의 나사 결합에 의해 결합되는 것이다.The upper cover 250 is installed at the upper end of the body 210, and the first female screw part 251 is screwed to the first male screw part 211 at the lower inner circumferential surface of the upper cover 250. Is formed, the lower outer peripheral surface is formed with a second male screw portion 254, the body 210 and the upper cover 250 is the first male screw portion 211 and the first female screw portion 251 It is to be joined by screwing.

또한 상기 몸체(210)의 상면과 상부커버(250)의 저면 사이에는 기밀을 유지하기 위한 제1오링(260)이 설치되어 있고, 몸체(210)의 외측 둘레면과 상부커버(250)의 내측 둘레면 사이에는 제2오링(270)이 설치되어 있다.In addition, a first O-ring 260 is installed between the upper surface of the body 210 and the bottom surface of the upper cover 250 to maintain airtightness, and an outer circumferential surface of the body 210 and an inner side of the upper cover 250. The second O-ring 270 is provided between the circumferential surface.

상기 제1오링(260)은 상,하의 탄성으로 기밀을 유지하지만, 제2오링(270)은 좌,우의 측면에 탄성 작용으로 상부커버(250)의 내측에서 밀착되어 있으므로, 차량의 진동으로 약간의 틈새가 벌어질 경우에는 제1오링(260)은 기밀을 상실되지만 측면으로 작용하는 제2오링(270)은 기밀을 유지하는 상태에 있으므로 가스 누출을 미연에 방지할 수 있는 특유의 효과가 있는 것이다.The first O-ring 260 maintains hermeticity with the elasticity of the upper and lower, but the second O-ring 270 is in close contact with the inner side of the upper cover 250 by elastic action on the left and right sides, slightly due to the vibration of the vehicle If the gap between the first O-ring 260 is not airtight, but the second O-ring 270 acting as a side is in a state of maintaining the airtight has a unique effect that can prevent gas leakage in advance. will be.

상기 상부커버(250)에는 천연가스가 공급되는 공급관(290)을 결합하기 위한 공급공(252)과, 필터관(230)을 통과하면서 이물질이 분리된 천연가스가 배출되는 배출관(291)을 결합하기 위한 배출공(253)이 형성되어 있다.The upper cover 250 is coupled to the supply hole 252 for coupling the supply pipe 290 for supplying natural gas and the discharge pipe 291 through which the natural gas from which foreign substances are separated while passing through the filter tube 230 is discharged. A discharge hole 253 is formed therein.

한편, 상기 몸체(210)와 상부커버(250)의 연결부에는 하부커버(280)가 설치되어 있되, 상기 하부커버(280)의 내측 둘레면에는 제2숫나사부(254)에 나사 결합되는 제2암나사부(281)가 형성되어 있고, 하부커버(280)의 하단에는 걸림턱(212)에 접촉되는 걸림링(282)이 형성되어 있다.On the other hand, the lower cover 280 is provided on the connection portion of the body 210 and the upper cover 250, the second screw threaded to the second male screw portion 254 on the inner peripheral surface of the lower cover 280 A female screw portion 281 is formed, and a locking ring 282 that is in contact with the locking jaw 212 is formed at the lower end of the lower cover 280.

따라서 하부커버(280)를 결합할 때 걸림턱(212)과 걸림링(282)이 접촉되면 더 이상 회전되지 않고 결합된 상태를 유지하게 되는 것이다.Therefore, when the locking jaw 212 and the locking ring 282 is in contact when the lower cover 280 is coupled, it will be maintained without being rotated any more.

그리고, 진동에 의한 나사부의 풀림을 방지하기 위하여 상기 제1숫나사부(211)와 제1암나사부(251)의 피치간격과 제2숫나사부(254)와 제2암나사부(281)의 피치간격을 서로 다른 간격으로 형성하거나, 상기 제1숫나사부(211)와 제1암나사부(251)의 피치방향과 제2숫나사부(254)와 제2암나사부(281)의 피치방향을 서로 다른 방향으로 형성하는 것이 바람직하다.And, in order to prevent loosening of the screw portion due to vibration, the pitch interval of the first male screw portion 211 and the first female screw portion 251 and the pitch interval of the second male screw portion 254 and the second female screw portion 281. Are formed at different intervals, or the pitch directions of the first male screw portion 211 and the first female screw portion 251 and the pitch directions of the second male screw portion 254 and the second female screw portion 281 are different from each other. It is preferable to form.

이와 같이 구성된 종래의 연료필터(200)는 차량에 장착되는 것이며, 상기 차량 주행중 발생되는 진동은 연료필터(200)에 전달되는 것이다.The conventional fuel filter 200 configured as described above is mounted on a vehicle, and vibration generated while driving the vehicle is transmitted to the fuel filter 200.

따라서, 장기간 사용시 연료필터(200)에 진동이 전달되어도 몸체(210)와 상부커버(250)는 제1숫나사부(211)와 제1암나사부(251)의 나사결합 및 제2숫나사부(254)와 제2암나사부(281)의 나사결합에 의해서 고정되어 있으므로, 결합력이 감소되는 것이 방지된다.Therefore, even when vibration is transmitted to the fuel filter 200 during long-term use, the body 210 and the upper cover 250 are screwed and the second male threaded portion 254 of the first male threaded portion 211 and the first female threaded portion 251. ) And the second female screw portion 281 are fixed by screwing, thereby preventing the coupling force from being reduced.

특히, 상기 제1숫나사부(211)와 제1암나사부(251)의 피치간격과 제2숫나사부(254)와 제2암나사부(281)의 피치간격을 서로 다른 간격으로 형성하거나, 상기 제1숫나사부(211)와 제1암나사부(251)의 피치방향과 제2숫나사부(254)와 제2암나사부(281)의 피치방향을 서로 다른 방향으로 형성할 경우에는 진동에 의한 풀림이 발생되지 않는 것이다.In particular, pitch pitches of the first male thread part 211 and the first female thread part 251 and pitch intervals of the second male thread part 254 and the second female thread part 281 are formed at different intervals, or When the pitch directions of the male screw portion 211 and the first female screw portion 251 and the pitch directions of the second male screw portion 254 and the second female screw portion 281 are formed in different directions, loosening due to vibration is prevented. It doesn't happen.

그리고, 상기 몸체(210)와 상부커버(250)의 사이에는 제1오링(260) 및 제2오링(270)이 각각 설치되어 있으므로, 가스가 누출되는 것이 방지되는 것이다.In addition, since the first O-ring 260 and the second O-ring 270 are installed between the body 210 and the upper cover 250, gas leakage is prevented.

이와 같은 본 발명에 의하면 연료필터(200)의 몸체(210)와 상부커버(250)를 견고하게 결합함은 물론, 장기간 사용시 연료필터(200)에 전달되는 진동에 의해서 몸체(210)와 상부커버(250)의 결합력이 감소되지 않게 되므로 가스 누출에 의한 안전사고를 미연에 방지할 수 있게 되는 것이다.According to the present invention as well as the body 210 and the upper cover 250 of the fuel filter 200 is firmly coupled, as well as the body 210 and the upper cover by the vibration transmitted to the fuel filter 200 during long-term use. Since the coupling force of 250 is not reduced, safety accidents due to gas leakage can be prevented in advance.

210 : 몸체 211 : 제1숫나사부
220 : 드레인 밸브 230 : 필터관
240 : 유도관 250 : 상부커버
251 : 제1암나사부 252 : 공급공
253 : 배출공 254 : 제2숫나사부
260 : 제1오링 270 : 제2오링
280 : 하부커버 281 : 제2암나사부210: body 211: first male thread portion
220: drain valve 230: filter tube
240: guide tube 250: top cover
251: 1st female thread 252: supply hole
253: discharge hole 254: second male thread portion
260: first O-ring 270: second O-ring
280: lower cover 281: second female screw portion

Claims (3)

외형을 형성하고, 상단 외측 둘레면에는 제1숫나사부(211)가 형성된 몸체(210);
상기 몸체(210)의 저면에 분리/결합 가능하게 설치된 드레인 밸브(220);
상기 몸체(210)에 내장되어 천연가스에 포함된 이물질을 분리하는 필터관(230);
상기 필터관(230)의 중앙부로 천연가스를 유도하도록 필터관(230)의 내부에 설치된 유도관(240);
상기 제1숫나사부(211)와 나사결합되는 제1암나사부(251)가 하부 내측 둘레면에 형성되고, 하부 외측 둘레면에는 제2숫나사부(254)가 형성되며, 상부에는 공급공(252) 및 배출공(253)이 형성된 상부커버(250);
상기 몸체(210)의 상면과 상부커버(250)의 저면 사이에는 기밀을 유지하도록 설치된 제1오링(260);
상기 몸체(210)의 외측 둘레면과 상부커버(250)의 내측 둘레면 사이에 기밀을 유지하도록 설치된 제2오링(270);
상기 제2숫나사부(254)에 나사 결합되는 제2암나사부(281)가 내측 둘레면에 형성된 하부커버(280)를 포함함을 특징으로 하는 천연가스 자동차용 연료필터.A body 210 having an outer shape and having a first male screw portion 211 formed at an outer circumferential surface of the upper end;
A drain valve 220 detachably installed on the bottom of the body 210;
A filter tube 230 which is built in the body 210 and separates foreign substances contained in natural gas;
An induction pipe 240 installed inside the filter pipe 230 to guide natural gas to the center of the filter pipe 230;
The first female screw portion 251, which is screwed to the first male screw portion 211, is formed on the lower inner circumferential surface, the second male screw portion 254 is formed on the lower outer circumferential surface, and the supply hole 252 is provided on the upper portion thereof. And an upper cover 250 in which the discharge hole 253 is formed;
A first O-ring 260 installed between the upper surface of the body 210 and the lower surface of the upper cover 250 to maintain airtightness;
A second O-ring 270 installed to maintain airtightness between the outer circumferential surface of the body 210 and the inner circumferential surface of the upper cover 250;
The second female screw portion (281) screwed to the second male screw portion (254) comprises a lower cover (280) formed on the inner circumferential surface. 청구항 1에 있어서, 상기 제1숫나사부(211)와 제1암나사부(251)의 피치간격과 제2숫나사부(254)와 제2암나사부(281)의 피치간격은 서로 다른 간격으로 형성됨을 특징으로 하는 천연가스 자동차용 연료필터.The method of claim 1, wherein the pitch spacing between the first male screw portion 211 and the first female screw portion 251 and the pitch spacing between the second male screw portion 254 and the second female screw portion 281 are formed at different intervals. A fuel filter for a natural gas vehicle, characterized in that. 청구항 1에 있어서, 상기 제1숫나사부(211)와 제1암나사부(251)의 피치방향과 제2숫나사부(254)와 제2암나사부(281)의 피치방향은 서로 다른 방향으로 형성됨을 특징으로 하는 천연가스 자동차용 연료필터.2. The pitch direction of the first male thread part 211 and the first female thread part 251 and the pitch direction of the second male thread part 254 and the second female thread part 281 are formed in different directions. A fuel filter for a natural gas vehicle, characterized in that.
KR1020110131799A 2011-12-09 2011-12-09 Fuel filter for compressed natural gas vehicle KR20130065088A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104248890A (en) * 2013-06-28 2014-12-31 量瑞流体科技(上海)有限公司 Compressed gas ultrafilter
US9463408B2 (en) 2014-05-06 2016-10-11 dHybrid Systems, LLC Compressed natural gas filter for natural gas vehicle
CN109882327A (en) * 2019-01-22 2019-06-14 蚌埠市海曼滤清器有限公司 A kind of anti-clogging filter of engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104248890A (en) * 2013-06-28 2014-12-31 量瑞流体科技(上海)有限公司 Compressed gas ultrafilter
CN104248890B (en) * 2013-06-28 2016-04-13 量瑞流体科技(上海)有限公司 Compressed Gas accurate filter
US9463408B2 (en) 2014-05-06 2016-10-11 dHybrid Systems, LLC Compressed natural gas filter for natural gas vehicle
US10161359B2 (en) 2014-05-06 2018-12-25 Worthington Industries, Inc. Compressed natural gas filter for natural gas vehicle
CN109882327A (en) * 2019-01-22 2019-06-14 蚌埠市海曼滤清器有限公司 A kind of anti-clogging filter of engine

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