KR900003999Y1 - Oil pressure control valve in excavator - Google Patents
Oil pressure control valve in excavator Download PDFInfo
- Publication number
- KR900003999Y1 KR900003999Y1 KR2019850011721U KR850011721U KR900003999Y1 KR 900003999 Y1 KR900003999 Y1 KR 900003999Y1 KR 2019850011721 U KR2019850011721 U KR 2019850011721U KR 850011721 U KR850011721 U KR 850011721U KR 900003999 Y1 KR900003999 Y1 KR 900003999Y1
- Authority
- KR
- South Korea
- Prior art keywords
- valve
- cylinder
- oil
- excavator
- hole
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/425—Drive systems for dipper-arms, backhoes or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2285—Pilot-operated systems
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Safety Valves (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 단면도.1 is a cross-sectional view of the present invention.
제2도는 본 고안의 작용상태를 나타낸 단면도.2 is a cross-sectional view showing an operating state of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 밸브체 2 : 밸브실1: valve body 2: valve chamber
3 : 통공 4 : 코일스프링3: through-hole 4: coil spring
5 : 스푸울밸브 6, 6' : 통로5: Spoul valve 6, 6 ': passage
7 : 캡 8 : 도입관7: cap 8: introduction tube
9 : 연결관9: connector
본 고안은 굴삭기(EXCAVATOR)의 암실린더등에 샤용되는 자동조절 부압 방지밸브에 관한 것이다.The present invention relates to a self-adjusting negative pressure preventing valve used in the dark cylinder of the excavator (EXCAVATOR).
굴삭기에 있어서 암실린더를 신장시키는 경우 작용유를 암실린더의 하부로 공급하면 암(ARM) 및 버켓의 중량에 의하여 제어하려는 유량의 속도보다 빨리 하강하게 되고, 이로 인하여 암실린더 내부하측에는 캐비테이션(Cabitation)이 생기게 되므로 압력손실과 소음 및 동체에 진동을 받게되는등 문제점이 있어 종래에는 올리퍼스(Orifice)와 첵크밸브를 암실린더의 상부유관에 병열로 설치하여 사용되어 왔으나 이는 올리퍼스의 내구면적이 일정하게 고정되어 있어 암실런더에 공급유량이 적은 경우에는 부압방지역활을 제대로 수행하지 못하고 또 공급유량이 많은 경우에는 압력손실이 큰 결함이 있었다.In the case of extending the dark cylinder in the excavator, supplying the working oil to the lower part of the dark cylinder lowers the speed of the flow rate to be controlled by the weight of the arm and the bucket, which causes the cavitation inside the lower cylinder. There are problems such as pressure loss, noise, and vibration in the fuselage.Therefore, oliffers and check valves have been used in parallel to the upper oil pipe of the arm cylinder. Since it is fixed constantly, when the supply flow rate is low in the dark cylinder, the negative pressure area activation cannot be performed properly, and when the supply flow rate is large, the pressure loss is large.
본 고안은 종래 그와 같은 결함을 해결하기 위하여 암실린더의 상부유관에 설치되어 있는 통상의 첵크밸브 상, 하부 및 앙실린더의 하부 유관 사이에 자동조절밸브를 배관설치하여 암실린더 하부유관의 파이롯유량(유압)에 따라 밸브체내의 스푸울 밸브가 이동작용을 하여 상부유관의 귀환통로를 크게 또는 작게 자동조절할 수 있게 하여, 부압방지와 압력손실이 없도록 할 목적으로 착안한 것인데 이를 첨부도면에 의거하여 상세히 설명하면 다음과 같다.The present invention is to provide a pilot of the lower cylinder of the lower cylinder by installing an automatic control valve between the upper, lower and the lower cylinder of the lower cylinder of the normal shank valve installed in the upper cylinder of the cylinder in order to solve such defects. According to the attached drawing, the spun valve in the valve body moves according to the flow rate (hydraulic pressure) so that the return passage of the upper oil pipe can be automatically or largely adjusted, thereby preventing negative pressure and no pressure loss. When described in detail as follows.
밸브체(1)내부 밸브실(2)에 통공(3)을 수직향으로 뚫은 스푸울밸브(5)를 내측의 코일스프링(4)으로 탄력설치함과 동시에 밸브체(1)에 개설한 상, 하 통로(6) (6')에 그 통공(3)이 관통되게 하여 상통로(6)는 암실린더(10)의 상부유관(11)에 실치한 공지의 첵크밸브(12)상부측에 배관 설치하고, 또 하통로(6')는 첵크밸브(12) 하부측에 배관 설치하며, 또 밸브실(2) 좌측 캡(7)에는 도입관(8)을 형성하여 암실린더(10)의 하부유관(11')을 통해 오일펌프(13)의 유압이 도입될때 그의 파이롯유압이 도입관(8)을 통해 밸브실(2)의 스푸울밸브(5)를 우측으로 밀어 작용하도록 한 것이다.The sprue valve 5, which vertically drills the through hole 3 in the valve chamber 2 inside the valve body 1, is elastically installed with the coil spring 4 on the inner side and opened in the valve body 1. The through hole 3 passes through the lower passage 6 and 6 'so that the upper passage 6 is placed on the upper side of the known check valve 12 mounted on the upper oil pipe 11 of the arm cylinder 10. Piping is provided, and the lower passage 6 'is provided in the lower side of the check valve 12, and an inlet pipe 8 is formed in the left side cap 7 of the valve chamber 2 so that the female cylinder 10 When the hydraulic pressure of the oil pump 13 is introduced through the lower oil pipe 11 ', its pilot hydraulic pressure pushes the spoof valve 5 of the valve chamber 2 to the right through the inlet pipe 8 to the right. .
도면중 미설명 부호 14은 유량의 방향전환밸브, 14'는 그의 핸들, 15는 연결관(9)에 설치된 올리퍼스(Orifice) 16은 오일탱크, 17은 피스톤이다.In the figure, reference numeral 14 denotes a flow diverting valve, 14 'is a handle thereof, 15 is an olifer 16 installed in a connecting pipe 9, and 17 is a piston.
이와 같이 구성된 본 고안은 굴삭기에 있어서, 그의 암실린더(10)에 방향전환밸브(14)의 핸들(14')조작으로 오일펌프(13)의 유압을 하부유관(11')을 통해 하부측에 공급시킴과 동시에 그의 상부유는 상부유관(11)을 통해 밸브체(1)의 상통로(6)와 통공(3) 및 하통로(6')을 거쳐 하부오일 탱크(10)로 귀환시켜 피스톤(17)을 상승시키고, 또 그와 반대로 피스톤(17)을 하강시킬때에는 오일펌프(13)의 유압을 상부유관(11)을 통해 상부측에 공급시킴과 동시에 그의 하부유는 하부유관(11')을 통해 오일탱크(16)에 귀환시켜 굴삭기의 암을 작동시키게 되는데 본 고안은 작업시 암실린더(10)의 피스톤(17)을 상승시키는 경우, 오일펌프(13)의 작동유를 암실린더(10)의 하부측에 공급시킬때에는 하부유관(11')을 통한 그의 파이롯 압력이 항상 밸브체(1)의 연결관(9)을 통하여 캡(7)의 도입관(8)으로 도입되어져서 밸브실(2)에 설치한 스푸울밸브(5)를 우측으로 밀어서 암실린더(10)상부측의 귀환유의 통로인 상,하 통로(6) (6')와 통공(3)과의 개구상태를 크게 또는 적게 개수시켜서 암실린더(10)의 상부측 귀환유량을 조정배출시키므로서 암실린더(10)내의 부압방지의 압력손실이 없는 효과가 있으며, 또 본 고안의 스푸울밸브(5)는 일측에 코일스프링(4)으로 밸브실(2)내에 탄력 설치되어 있으므로 상기의 파이롯 압력이 도입관(8)을 통해 스푸울밸브(5)의 좌측에 강하게 가압하여 코일스프링(4)의 수축을 크게하면 상하통로(6) (6')와 통공(3)이 크게 개방되어 귀환유가 빨리 배출되고 반대로 파이롯압력이 약하게 가압하여 코일스프링(4)의 수축을 작게하면 상하통로(6) (6')와 통공(3)이 작게 열려서 귀환유가 느리게 배출케 되는 작동이 원활히 자동적으로 조절이 되므로 사용이 매우 편리하고 또 그 구성을 간단하여 고장없이 장기간 이용할수 있는 이점도 있다.According to the present invention configured as described above, the hydraulic pressure of the oil pump 13 is lowered through the lower oil pipe 11 'by manipulating the handle 14' of the direction switching valve 14 to the female cylinder 10 of the excavator. At the same time, the upper oil is returned to the lower oil tank 10 via the upper oil passage 11, the upper passage 6 of the valve body 1, the through hole 3, and the lower passage 6 '. At the time of raising the 17 and vice versa, when the piston 17 is lowered, the oil pressure of the oil pump 13 is supplied to the upper side through the upper oil pipe 11 and the lower oil is lower oil 11 '. By returning back to the oil tank 16 to operate the excavator's arm, the present invention raises the piston 17 of the arm cylinder 10 during operation, the operating oil of the oil pump 13 to the arm cylinder (10) When feeding to the lower side of the valve), its pilot pressure through the lower oil pipe 11 'is always shown through the connecting pipe 9 of the valve body 1 The upper and lower passages 6 and 6 ', which are introduced into the inlet pipe 8 and push the sprue valve 5 installed in the valve chamber 2 to the right, are the passages for the return oil on the upper side of the arm cylinder 10. By opening or closing the opening state with the through hole 3 to adjust or discharge the upper return flow rate of the upper cylinder 10, there is an effect that there is no pressure loss of the negative pressure prevention in the female cylinder 10, and Since the spun valve 5 is elastically installed in the valve chamber 2 with the coil spring 4 on one side, the pilot pressure is strongly pressurized to the left side of the spun valve 5 through the introduction pipe 8. If the contraction of the coil spring 4 is increased, the upper and lower passages 6, 6 'and the through hole 3 are largely opened, and the return oil is quickly discharged. On the contrary, the pilot pressure is weakly pressed to reduce the contraction of the coil spring 4. When the upper and lower passages (6) (6 ') and the through hole (3) are small, the operation of slowly returning the return oil is automatically performed. It is very convenient to use and can be used for a long time without failure because its configuration is simple.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850011721U KR900003999Y1 (en) | 1985-09-13 | 1985-09-13 | Oil pressure control valve in excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850011721U KR900003999Y1 (en) | 1985-09-13 | 1985-09-13 | Oil pressure control valve in excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR870005304U KR870005304U (en) | 1987-04-23 |
| KR900003999Y1 true KR900003999Y1 (en) | 1990-05-07 |
Family
ID=19245231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019850011721U KR900003999Y1 (en) | 1985-09-13 | 1985-09-13 | Oil pressure control valve in excavator |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900003999Y1 (en) |
-
1985
- 1985-09-13 KR KR2019850011721U patent/KR900003999Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR870005304U (en) | 1987-04-23 |
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