KR20150021165A - Hydro-pneumatic type relief valve - Google Patents

Hydro-pneumatic type relief valve Download PDF

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Publication number
KR20150021165A
KR20150021165A KR20130098052A KR20130098052A KR20150021165A KR 20150021165 A KR20150021165 A KR 20150021165A KR 20130098052 A KR20130098052 A KR 20130098052A KR 20130098052 A KR20130098052 A KR 20130098052A KR 20150021165 A KR20150021165 A KR 20150021165A
Authority
KR
South Korea
Prior art keywords
valve
valve body
spring
relief valve
inlet
Prior art date
Application number
KR20130098052A
Other languages
Korean (ko)
Inventor
안중혁
강병익
이지민
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR20130098052A priority Critical patent/KR20150021165A/en
Publication of KR20150021165A publication Critical patent/KR20150021165A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves

Abstract

The present invention relates to a relief valve used to prevent damage to a hydraulic device by the over-pressure in the hydraulic system and, more specifically, to a hydro-pneumatic relief valve which allows a valve to be operated by combination of a spring and hydro-pneumatic pressure in a traditional valve opening and closing structure operated by a spring so that a valve can be stably opened and closed. According to the present invention, the relief valve comprises a valve body having an inlet and an outlet; a disc which is installed in the valve body and opens and closes the inlet and the outlet; a valve sheet where the disc is mounted; a spring which opens and closes the disc in accordance with the working fluid pressure in the inlet; a cap equipped to be detached from the upper part of the valve body; a slide axis which is installed to be slid up and down by being fixed o the center of the upper surface of the disc in the lower end; a piston member which is fixed to the upper end of the slide axis and is installed to be slid up and down along the inner wall surface of a cylinder unit of the upper part of the valve body; a compressed fluid which is charged between the bottom of the piston member and the bottom surface of the cylinder unit of the upper part of the valve body; and a sealing member which is arranged in the bottom surface of the cylinder unit of the upper part of the valve body in order to prevent the leakage of the compressed fluid.

Description

A hydraulic-pneumatic relief valve

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relief valve used to prevent breakage of a hydraulic device due to overpressure in a hydraulic system, and more particularly, to a relief valve that is operated by a combination of a spring and a hydraulic pressure, Pressure relief valve for reliably opening and closing a valve.

BACKGROUND ART [0002] In general, a relief valve discharges a part or all of a working fluid flowing in a flow path when a pressure of a flow path in a hydraulic system reaches a set pressure of a valve, And a pressure control valve for preventing breakage of a turning motor and a traveling motor of a construction machine. This serves as a safety valve in the hydraulic system so that the internal pressure does not rise above a predetermined pressure.

FIG. 1 is a longitudinal sectional view of a relief valve according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view illustrating a relief valve of FIG. 1 in an open state.

1 and 2, a relief valve 10 according to one embodiment of the present invention includes a valve body 20 having an inlet 21 and an outlet 22, A valve seat 40 on which the disk 30 is mounted and a disk 30 on which the disk 30 is inserted when the disk 30 is opened and closed, A valve stem 50 which restricts the opening range of the valve stem 50 and a spring receiving hole 61 which is fixed to the valve stem 50 and which is supported by an outward elastic force, A spring 60 for opening or closing the disc 30 according to the working fluid pressure and a cap 70 detachably provided on the upper portion of the valve body 20 for the adjustment of the valve stem 50, (21) side of the valve body (20) is connected to the working fluid passage (not shown) of the hydraulic system (Not shown) for discharging part or all of the working fluid. When the set pressure in the flow path on the side of the inlet 21 is in a normal range, the elastic force of the spring 60 2, the disk 30 is lifted from the valve seat 40 while compressing the spring 60 as shown in Fig. 2 by the hydraulic pressure so that the valve is opened A part or all of the working fluid is discharged through the outlet 22.

When the working fluid is discharged and the pressure in the flow path of the inlet 21 drops below the set pressure, the compressed spring 60 expands and is restored to descend the disk 30 to the valve seat 40 to close the valve .

However, since the conventional relief valve 10 is opened and closed only by the operation of the metallic spring 60, the moment when the force due to the external overpressure and the force of the spring 60 are in equilibrium, The external pressure of the valve is referred to as a breaking pressure. At this time, the valve opening / closing occurs repeatedly unstably to deteriorate the valve performance, and the hydraulic equipment and the valve are damaged.

In order to prevent the above problem, a relief valve using metal springs having various structures has been proposed. However, the solution is not fundamentally solved, and the structure and shape of the relief valve are becoming more complicated and the manufacturing cost is increased due to the complicated structure. There is a problem that the structure and shape of the complicated relief valve are liable to cause additional quality problems.

SUMMARY OF THE INVENTION The present invention has been devised to overcome the above problems and provides a pneumo-hydraulic relief valve that allows a valve opening / closing structure by a conventional spring operation to be operated in combination with a combination of a spring and a hydraulic pressure, It has its purpose.

According to an aspect of the present invention, there is provided a pneumatic relief valve comprising: a valve body having an inlet and an outlet; a disk provided inside the valve body for opening and closing an inlet and an outlet; A known relief valve comprising a seat, a spring for opening and closing the disk in accordance with the working fluid pressure on the inlet side, and a cap detachably provided on the top of the valve body, A slide shaft having a lower end fixed and slidably installed up and down; A piston member fixed to an upper end portion of the slide shaft and slidably installed up and down along an inner wall surface of an upper side cylinder portion of the valve body; A compression fluid filled between a bottom surface of the piston member and a bottom surface of an upper side cylinder portion of the valve body; And a sealing member interposed to prevent leakage of the compressed fluid to the bottom surface of the upper side cylinder portion of the valve body.

And the spring is supported by vertically applying an outward elastic force between the piston member and the cap.

And the compressed fluid is composed of hydraulic oil and compressed air.

According to the pneumo-hydraulic relief valve of the present invention, when the pressure of the flow path in the hydraulic system is higher or lower than the set pressure of the valve, the disk operates in cooperation with the combination of the pneumatic pressure and the spring of the compressed fluid composed of hydraulic oil and compressed air So that the valve can be stably opened and closed.

1 is a longitudinal sectional view showing a relief valve according to a conventional example,
Fig. 2 is a longitudinal sectional view showing the relief valve of Fig. 1 in an open state,
3 is a longitudinal sectional view of a pneumo-hydraulic relief valve according to an embodiment of the present invention,
Fig. 4 is a longitudinal sectional view showing a state in which the pneumo-hydraulic relief valve of Fig. 3 is opened. Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of a pneumo-hydraulic relief valve according to the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention can be modified into various forms and the scope of the present invention should not be construed as being limited to the embodiments described in detail below.

In addition, the shapes and the like of the elements in the drawings may be exaggerated in order to emphasize a clearer explanation, and the same members in the drawings may be denoted by the same reference numerals, and the gist of the present invention may be unnecessarily blurred Detailed descriptions of known functions and configurations to be determined are omitted.

FIG. 3 is a longitudinal sectional view showing a pneumatic relief valve according to an embodiment of the present invention, and FIG. 4 is a longitudinal sectional view showing a state in which the hydraulic relief valve of FIG. 3 is opened.

3 and 4, the pneumo-hydraulic relief valve 100 according to the present invention includes a valve body 200 having an inlet 210 and an outlet 220 formed therein, A valve seat 400 on which the disk 300 is seated and a disk 300 on which the disk 300 is mounted in accordance with a working fluid pressure on the side of the inlet port 210. [ And a cap 700 detachably provided on the upper portion of the valve body 200. The relief valve includes a valve body 200 and a cap 700. The relief valve includes a valve body 200, A slide shaft 310 having a lower end fixed and slidably installed up and down; A piston member 500 fixed to an upper end of the slide shaft 310 and slidably installed up and down along an inner wall surface of the upper cylinder portion 230 of the valve body 200; A compressed fluid (800) filled between the bottom surface of the piston member (500) and the bottom surface of the upper side cylinder part (230) of the valve body (200); And a sealing member 240 interposed to prevent leakage of the compressed fluid 800 to the bottom surface of the upper cylinder portion 230 of the valve body 200.

At this time, the spring 600 is supported by vertically applying an outward elastic force between the piston member 500 and the cap 700. At this time, the spring 600 is a compression coil spring.

The compressed fluid 800 is preferably composed of hydraulic oil HF and compressed air PA. When the disk 300 is opened and closed between the inlet port 210 and the outlet port 220 of the valve body 200 by filling the lower portion with the hydraulic fluid HF and filling the upper portion with the compressed air PA, The valve opening operation can be performed with a small load and the valve closing operation requires a larger load so that unstable opening and closing of the valve caused by the burst pressure can be stably performed It is for this reason.

The operation and effect of the pneumo-hydraulic relief valve according to the present invention constructed as above will be described.

The inlet port 210 side of the valve body 200 is connected to the working fluid flow path (not shown) of the hydraulic system and the outlet port 220 side is connected to a part of the working fluid The valve is closed by the outward elasticity of the spring 600 when the set pressure in the flow path of the inlet port 210 is in the normal range and the valve is closed as shown in FIG. 210 and 210 is higher than the set pressure, the disk 300 is lifted from the valve seat 400 while compressing the spring 60 by the hydraulic pressure as shown in FIG. 4, . At this time, the piston member 500 rises by the pneumatic pressure of the compressed fluid 800 composed of the hydraulic oil HF and the compressed air PA to compress the spring 60, The disk 300 is operated in conjunction with the combination of the pneumatic pressure of the compressed fluid 800 and the spring 600 by lifting the disk 300 fixed with the valve seat 400 from the valve seat 400 The valve opening by the hydraulic pressure becomes possible with a small load.

When the working fluid is discharged and the pressure in the flow path on the inlet port 210 drops below the set pressure, the compressed spring 600 expands and is restored to descend the piston member 500, The disk 300 fixed by the valve 310 is lowered to the valve seat 400 to close the valve. At this time, due to the pore pressure of the compressed fluid (800) comprising the hydraulic oil (HF) and the compressed air (PA), a load greater than the valve opening occurs when the piston member 500 is moved down, . Therefore, since the disc 300 is operated by a combination of the pneumatic pressure of the compressed fluid 800 and the spring 600, the valve closing is relieved to prevent the valve opening and closing from occurring repeatedly unstably .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the particular details of the embodiments set forth herein. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

100: Pneumo-hydraulic relief valve 200: Valve body
210: inlet 220: outlet
230: cylinder part 240: sealing member
300: Disk 310: Slide shaft
400: valve seat 500: piston member
600: spring 700: cap
800: Compressed fluid
HF: Hydraulic oil PA: Compressed air

Claims (3)

A valve body 200 having an inlet 210 and an outlet 220 formed therein and a disk 300 installed inside the valve body 200 to open and close between the inlet 210 and the outlet 220, A spring 600 for opening or closing the disc 300 in accordance with a working fluid pressure at the inlet port 210; In the known relief valve including the cap 700 provided therein,
A slide shaft 310 having a lower end fixed to the center of the upper surface of the disk 300 and slidably installed up and down;
A piston member 500 fixed to an upper end of the slide shaft 310 and slidably installed up and down along an inner wall surface of the upper cylinder portion 230 of the valve body 200;
A compressed fluid (800) filled between the bottom surface of the piston member (500) and the bottom surface of the upper side cylinder part (230) of the valve body (200);
And a sealing member (240) interposed to prevent leakage of the compressed fluid (800) to the bottom surface of the upper cylinder part (230) of the valve body (200) . The method according to claim 1,
Wherein the spring (600) is supported by vertically applying an outward elastic force between the piston member (500) and the cap (700). The method according to claim 1,
Wherein the compressed fluid (800) comprises hydraulic oil (HF) and compressed air (PA).
KR20130098052A 2013-08-19 2013-08-19 Hydro-pneumatic type relief valve KR20150021165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20130098052A KR20150021165A (en) 2013-08-19 2013-08-19 Hydro-pneumatic type relief valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130098052A KR20150021165A (en) 2013-08-19 2013-08-19 Hydro-pneumatic type relief valve

Publications (1)

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KR20150021165A true KR20150021165A (en) 2015-03-02

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110056690A (en) * 2018-01-17 2019-07-26 秦皇岛森润滋科技有限公司 A kind of No leakage hydraulic cushion vacuum breaking aeration valve
CN110985722A (en) * 2018-10-02 2020-04-10 细美事有限公司 Substrate processing apparatus and safety valve applied to the same
CN112431380A (en) * 2020-11-19 2021-03-02 江苏海筑建设集团有限公司 Ceramic tile plastering device
CN117065958A (en) * 2023-10-16 2023-11-17 烟台美嘉涂胶设备有限公司 Angle-adjustable grease spray valve
CN117231829A (en) * 2023-11-15 2023-12-15 太仓濂辉液压器材有限公司 Explosion-proof and leak-proof high-pressure oil pipe assembly

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110056690A (en) * 2018-01-17 2019-07-26 秦皇岛森润滋科技有限公司 A kind of No leakage hydraulic cushion vacuum breaking aeration valve
CN110056690B (en) * 2018-01-17 2024-04-09 秦皇岛森润滋科技有限公司 Leakless hydraulic buffer vacuum damage air compensating valve
CN110985722A (en) * 2018-10-02 2020-04-10 细美事有限公司 Substrate processing apparatus and safety valve applied to the same
US11655907B2 (en) 2018-10-02 2023-05-23 Semes Co., Ltd. Substrate treating apparatus and safety valve applied thereto
CN112431380A (en) * 2020-11-19 2021-03-02 江苏海筑建设集团有限公司 Ceramic tile plastering device
CN112431380B (en) * 2020-11-19 2022-03-11 江苏海筑建设集团有限公司 Ceramic tile plastering device
CN117065958A (en) * 2023-10-16 2023-11-17 烟台美嘉涂胶设备有限公司 Angle-adjustable grease spray valve
CN117231829A (en) * 2023-11-15 2023-12-15 太仓濂辉液压器材有限公司 Explosion-proof and leak-proof high-pressure oil pipe assembly
CN117231829B (en) * 2023-11-15 2024-01-30 太仓濂辉液压器材有限公司 Explosion-proof and leak-proof high-pressure oil pipe assembly

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