CN104295781A - Safety throttle valve - Google Patents
Safety throttle valve Download PDFInfo
- Publication number
- CN104295781A CN104295781A CN201410551200.6A CN201410551200A CN104295781A CN 104295781 A CN104295781 A CN 104295781A CN 201410551200 A CN201410551200 A CN 201410551200A CN 104295781 A CN104295781 A CN 104295781A
- Authority
- CN
- China
- Prior art keywords
- cavity volume
- valve
- radial hole
- valve core
- spool
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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Classifications
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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
- 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
- F16K17/044—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 with more than one spring
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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
- 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
- F16K17/0473—Multiple-way safety valves
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a safety throttle valve comprising a valve body, a taper spool and a slide spool. The valve body is internally provided with a first cavity and a second cavity. The taper spool is arranged inside the first cavity. The slide spool is disposed inside the second cavity. A first spring is disposed between the taper spool and the valve body. The valve body is provided with a first radial hole. The slide spool is internally axially provided with a third cavity and a fourth cavity. The slide spool is provided with a second radial hole and a third radial hole. The second radial hole is communicated with the third cavity. The third radial hole is communicated with the fourth cavity. A damping hole is provided between the third cavity and the fourth cavity. A second spring is disposed inside the second cavity. The first radial hole is connected with an opening T connected with an oil tank. The valve body is provided with an oblique hole; one end of the oblique hole is communicated with the first cavity, and the other end of the oblique hole is communicated with the opening T. The safety throttle valve as functional as a universal safety valve and a universal throttle valve is compact in structure, requires only one mounting hole, is convenient to mount, has small pressure regulation error, is high in pressure regulation precision and allows stable flow regulation.
Description
Technical field
The present invention relates to a kind of valve, particularly relate to a kind of safety throttle valve.
Background technique
Common safety valve is in closed condition when hydraulic system normally works; only have and just open overflow when system pressure is more than or equal to minimum setting pressure of relief valve; overload protective function is risen to system; by means of control mechanism, spool is moved relative to valve body hole during conventional throttle valve, to change the area of passage of valve port thus regulation output flow.
Not only need control flow but also need pilot pressure in the runner of some occasion of Hydraulic Field, and now general safety valve and throttle valve are all independent valve body structures, need two mounting holes, and the setting precision of flow and pressure is not high.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve the problem, and the invention provides a kind of safety throttle valve and solves the problems referred to above.
The technical solution adopted for the present invention to solve the technical problems is a kind of safety throttle valve, comprise valve body, poppet valve core and valve core of the spool valve, there is in described valve body the first cavity volume and the second cavity volume, described poppet valve core is arranged in the first cavity volume, described valve core of the spool valve is arranged in the second cavity volume, described poppet valve core is used for intercepting and being communicated with the first cavity volume and the second cavity volume, spring one is provided with and spring one acts on large end, the cross section of described poppet valve core between described poppet valve core and valve body, described valve body has radial hole one, the 3rd cavity volume and the 4th cavity volume is axially arranged with in described valve core of the spool valve, described valve core of the spool valve has radial hole two and radial hole three, described radial hole two is communicated with the 3rd cavity volume, described radial hole three is communicated with the 4th cavity volume, the damping hole for controlling flow is provided with between the 3rd described cavity volume and the 4th cavity volume, spring two is also provided with in the second described cavity volume, described spring two acts on valve core of the spool valve one end near the 4th cavity volume,
Described radial hole one is connected with the T mouth be connected with fuel tank, and described valve body has inclined hole, and described inclined hole one end is communicated with the first cavity volume, and the other end is communicated with T mouth.
Described radial hole three has 2, and circumference is distributed on valve core of the spool valve.
Described radial hole two has 4, and circumference is distributed on valve core of the spool valve.
The section area at the axial two ends of described valve core of the spool valve is equal.
When the pressure of the 3rd cavity volume is less than the spring force of spring one, poppet valve core is closed, first cavity volume is not communicated with the second cavity volume, the hydraulic fluid pressure to the right of the 3rd cavity volume and spring two spring force left and the second cavity volume hydraulic fluid pressure left keep balancing, the radial hole three of valve core of the spool valve is corresponding with radial hole on valve body one, and fluid approach damping hole, radial hole three, radial hole one flow to T mouth.
When the pressure of the 3rd cavity volume is greater than the spring force of spring one, poppet valve core is opened, first cavity volume, the second cavity volume, fuel tank T mouth are communicated with, second chamber pressure reduces, valve core of the spool valve slides to the right under the effect of the hydraulic fluid pressure to the right of the 3rd cavity volume, the radial hole two of valve core of the spool valve is corresponding with the radial hole one on valve body, and fluid approach radial hole two, radial hole one flow to T mouth.
The invention has the beneficial effects as follows that safety throttle valve of the present invention has the effect of universal protection valve and general throttle valve concurrently, compact structure simultaneously, only need a mounting hole, easy for installation, and also override pressure is little, and regulation precision is high, throttle valve adjustment stability of flow.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the optimum embodiment of safety throttle valve of the present invention.
In figure 1, valve body, 2, poppet valve core, 3, spring one, 4, valve core of the spool valve, 5, spring two, 6, filter screen, 7-1, the first pad, 7-2, the second pad, 8, spiral back-up ring, 1-K1, radial hole one, 1-K2, inclined hole, 1-R1, the first cavity volume, 1-R2, the second cavity volume, 4-R3, the 3rd cavity volume, 4-R4, the 4th cavity volume, 4-K1, radial hole three, 4-K2, radial hole two, 4-K3, damping hole.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
As shown in Figure 1, a kind of safety throttle valve of the present invention, comprise valve body 1, poppet valve core 2 and valve core of the spool valve 4, there is in valve body 1 first cavity volume 1-R1 and the second cavity volume 1-R2, poppet valve core 2 is arranged in the first cavity volume 1-R1, valve core of the spool valve 4 is arranged in the second cavity volume 1-R2, poppet valve core 2 is for intercepting and being communicated with the first cavity volume 1-R1 and the second cavity volume 1-R2, spring 1 is provided with and spring 1 acts on large end, the cross section of poppet valve core 2 between poppet valve core 2 and valve body 1 inwall, valve body 1 has radial hole one 1-K1, the 3rd cavity volume 4-R3 and the 4th cavity volume 4-R4 is provided with vertically in valve core of the spool valve 4, valve core of the spool valve 4 has radial hole two 4-K2 and radial hole three 4-K1, radial hole two 4-K2 is communicated with the 3rd cavity volume 4-R3, radial hole three 4-K1 is communicated with the 4th cavity volume 4-R4, the damping hole 4-K3 for controlling flow is provided with between 3rd cavity volume 4-R3 and the 4th cavity volume 4-R4, spring 25 is also provided with in second cavity volume 1-R2, spring 25 acts on valve core of the spool valve 4 one end near the 4th cavity volume 4-R4, radial hole one 1-K1 is connected with the T mouth be connected with fuel tank, and described valve body 1 has inclined hole 1-K2, and inclined hole 1-K2 one end is communicated with the first cavity volume 1-R1, and the other end is communicated with T mouth.
Radial hole three 4-K1 has 2, and circumference is distributed on valve core of the spool valve 4.Radial hole two 4-K2 has 4, and circumference is distributed on valve core of the spool valve 4.The section area at the axial two ends of valve core of the spool valve 4 is equal.
When the pressure of the 3rd cavity volume 4-R3 is less than the spring force of spring 1, poppet valve core 2 is closed, first cavity volume 1-R1 is not communicated with the second cavity volume 1-R2, the hydraulic fluid pressure to the right of the 3rd cavity volume 4-R3 and spring 25 spring force left and the second cavity volume 1-R2 hydraulic fluid pressure left keep balancing, radial hole three 4-K1 of valve core of the spool valve 4 is corresponding with radial hole one 1-K1 on valve body 1, and the fluid approach damping hole 4-K3 in the 3rd cavity volume 4-R3, radial hole three 4-K1, radial hole one 1-K1 flow to T mouth.
When the pressure of the 3rd cavity volume 4-R3 is greater than the spring force of spring 1, poppet valve core 2 is opened, first cavity volume 1-R1, second cavity volume 1-R2, T mouth are communicated with, second cavity volume 1-R2 pressure reduces, valve core of the spool valve 4 slides to the right under the effect of the hydraulic fluid pressure to the right of the 3rd cavity volume 4-R3, radial hole two 4-K2 of valve core of the spool valve 4 is corresponding with radial hole one 1-K1 on valve body 1, and fluid approach radial hole two 4-K2 in the 3rd cavity volume 4-R3, radial hole one 1-K1 flow to T mouth.
A kind of safety throttle valve also comprises the filter screen 6 for filtering impurity in fluid, for the first pad 7-1, the second pad 7-2 and the spiral back-up ring 8 of fixing filter screen 6;
Working principle: valve body 1 has radial hole one 1-K1, valve core of the spool valve 4 two ends active area is equal, valve core of the spool valve 4 has two row's radial holes, first row is radial hole three 4-K1, there are 2, circumference is distributed on valve core of the spool valve 4, second row has radial hole two 4-K2, there are 4, circumference is distributed on valve core of the spool valve 4, and valve core of the spool valve 4 inside is axially provided with the 3rd cavity volume 4-R3 successively, for controlling flow damping hole 4-K3, 4th cavity volume 4-R4, when the pressure of the 3rd cavity volume 4-R3 is less than the return spring force on poppet valve core 2, poppet valve core 2 is not opened, now valve core of the spool valve 4 is at the 3rd cavity volume 4-R3 hydraulic fluid pressure to the right, balance is kept under the effect of return spring force left and the second cavity volume 1-R2 hydraulic fluid pressure left, now the fluid of the first cavity volume 1-R1 is successively by the damping hole 4-K3 of valve core of the spool valve 4 inside, two radial hole three 4-K1 of the first row of valve core of the spool valve 4, radial hole 1-K1 on valve body 1, the T mouth that the final flow direction is communicated with fuel tank, be now firm discharge by the flow of the damping hole 4-K3 of valve core of the spool valve 4 inside, play the effect of general throttle valve.
Valve body 1 has inclined hole 1-K2, first cavity volume 1-R1 is communicated with the T mouth being connected fuel tank, when the pressure of the 3rd cavity volume 4-R3 is greater than the return spring force on poppet valve core 2, poppet valve core 2 is opened, second cavity volume 1-R2 of valve body 1 is communicated with the first cavity volume 1-R1, and then be communicated with the T mouth being connected fuel tank, now the second cavity volume 1-R2 pressure of valve body 1 reduces, then on valve core of the spool valve 4, the second cavity volume 1-R2 hydraulic fluid pressure left reduces, valve core of the spool valve 4 moves right in valve body 2, two radial hole three 4-K1 having blocked valve core of the spool valve 4 first row are communicated with situation with radial hole one 1-K1's on valve body 1, namely fluid is without the damping hole 4-K3 of valve core of the spool valve 4 inside, now the fluid of the 3rd cavity volume 4-R3 passes through four radial hole two 4-K2 of the second row on valve core of the spool valve 4, the T mouth that the direct flow direction is communicated with fuel tank, now flow is larger, serve the effect of safety valve.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to right.
Claims (6)
1. a safety throttle valve, it is characterized in that: comprise valve body (1), poppet valve core (2) and valve core of the spool valve (4), there is in described valve body (1) the first cavity volume (1-R1) and the second cavity volume (1-R2), described poppet valve core (2) is arranged in the first cavity volume (1-R1), described valve core of the spool valve (4) is arranged in the second cavity volume (1-R2), described poppet valve core (2) is for intercepting and being communicated with the first cavity volume (1-R1) and the second cavity volume (1-R2), spring one (3) is provided with between described poppet valve core (2) and valve body (1) inwall, and spring one (3) acts on large end, the cross section of described poppet valve core (2), described valve body (1) has radial hole one (1-K1), the 3rd cavity volume (4-R3) and the 4th cavity volume (4-R4) is provided with vertically in described valve core of the spool valve (4), described valve core of the spool valve (4) has radial hole two (4-K2) and radial hole three (4-K1), described radial hole two (4-K2) is communicated with the 3rd cavity volume (4-R3), described radial hole three (4-K1) is communicated with the 4th cavity volume (4-R4), the damping hole (4-K3) for controlling flow is provided with between the 3rd described cavity volume (4-R3) and the 4th cavity volume (4-R4), spring two (5) is also provided with in described the second cavity volume (1-R2), described spring two (5) acts on valve core of the spool valve (4) one end near the 4th cavity volume (4-R4),
Described radial hole one (1-K1) is connected with the T mouth be connected with fuel tank, described valve body (1) has inclined hole (1-K2), described inclined hole (1-K2) one end is communicated with the first cavity volume (1-R1), and the other end is communicated with T mouth.
2. safety throttle valve according to claim 1, is characterized in that: described radial hole three (4-K1) has 2, and circumference is distributed on valve core of the spool valve (4).
3. safety throttle valve according to claim 1, is characterized in that: described radial hole two (4-K2) has 4, and circumference is distributed on valve core of the spool valve (4).
4. safety throttle valve according to claim 1, is characterized in that: the section area at described valve core of the spool valve (4) axial two ends is equal.
5. safety throttle valve according to claim 1, it is characterized in that: when the pressure of the 3rd cavity volume (4-R3) is less than the spring force of spring one (3), poppet valve core (2) is closed, first cavity volume (1-R1) is not communicated with the second cavity volume (1-R2), the hydraulic fluid pressure to the right of the 3rd cavity volume (4-R3) and spring two (5) spring force left and the second cavity volume (1-R2) hydraulic fluid pressure left keep balancing, the radial hole three (4-K1) of valve core of the spool valve (4) is corresponding with the upper radial hole one (1-K1) of valve body (1), fluid approach damping hole (4-K3) in 3rd cavity volume (4-R3), radial hole three (4-K1), radial hole one (1-K1) flows to T mouth.
6. safety throttle valve according to claim 1, it is characterized in that: when the pressure of the 3rd cavity volume (4-R3) is greater than the spring force of spring one (3), poppet valve core (2) is opened, first cavity volume (1-R1), second cavity volume (1-R2), T mouth is communicated with, second cavity volume (1-R2) pressure reduces, valve core of the spool valve (4) slides to the right under the effect of the hydraulic fluid pressure to the right of the 3rd cavity volume (4-R3), the radial hole two (4-K2) of valve core of the spool valve (4) is corresponding with the radial hole one (1-K1) on valve body (1), fluid approach radial hole two (4-K2) in 3rd cavity volume (4-R3), radial hole one (1-K1) flows to T mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551200.6A CN104295781B (en) | 2014-10-16 | 2014-10-16 | Safety throttle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551200.6A CN104295781B (en) | 2014-10-16 | 2014-10-16 | Safety throttle valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104295781A true CN104295781A (en) | 2015-01-21 |
| CN104295781B CN104295781B (en) | 2017-03-15 |
Family
ID=52315635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410551200.6A Active CN104295781B (en) | 2014-10-16 | 2014-10-16 | Safety throttle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104295781B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439145A (en) * | 2016-11-25 | 2017-02-22 | 合肥协力液压科技有限公司 | Hydraulic valve |
| CN106838398A (en) * | 2015-11-05 | 2017-06-13 | 费希尔控制产品国际有限公司 | The method of the stick force on balanced trim and reduction valve rod |
| CN107614923A (en) * | 2015-06-03 | 2018-01-19 | Ｋｙｂ株式会社 | Decay valve and buffer |
| CN116906399A (en) * | 2023-07-17 | 2023-10-20 | 杭州励贝电液科技有限公司 | Hydraulic proportional speed regulating valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0742857A (en) * | 1993-08-03 | 1995-02-10 | Sanwa Seiki Co Ltd | Back pressure valve |
| US20030111114A1 (en) * | 2001-12-18 | 2003-06-19 | Koo Bon Seok | Hydraulic relief valve |
| CN1432752A (en) * | 2002-01-11 | 2003-07-30 | 沃尔沃建造设备控股（瑞典）有限公司 | Guiding pressure rise controlling valve |
| US20070056632A1 (en) * | 2005-09-15 | 2007-03-15 | Volvo Construction Equipment Holding Sweden Ab | Hydraulic relief valve |
| CN204187068U (en) * | 2014-10-16 | 2015-03-04 | 江苏恒立液压有限公司 | Safety throttle valve |
-
2014
- 2014-10-16 CN CN201410551200.6A patent/CN104295781B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0742857A (en) * | 1993-08-03 | 1995-02-10 | Sanwa Seiki Co Ltd | Back pressure valve |
| US20030111114A1 (en) * | 2001-12-18 | 2003-06-19 | Koo Bon Seok | Hydraulic relief valve |
| CN1432752A (en) * | 2002-01-11 | 2003-07-30 | 沃尔沃建造设备控股（瑞典）有限公司 | Guiding pressure rise controlling valve |
| US20070056632A1 (en) * | 2005-09-15 | 2007-03-15 | Volvo Construction Equipment Holding Sweden Ab | Hydraulic relief valve |
| CN204187068U (en) * | 2014-10-16 | 2015-03-04 | 江苏恒立液压有限公司 | Safety throttle valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107614923A (en) * | 2015-06-03 | 2018-01-19 | Ｋｙｂ株式会社 | Decay valve and buffer |
| CN106838398A (en) * | 2015-11-05 | 2017-06-13 | 费希尔控制产品国际有限公司 | The method of the stick force on balanced trim and reduction valve rod |
| CN106439145A (en) * | 2016-11-25 | 2017-02-22 | 合肥协力液压科技有限公司 | Hydraulic valve |
| CN116906399A (en) * | 2023-07-17 | 2023-10-20 | 杭州励贝电液科技有限公司 | Hydraulic proportional speed regulating valve |
| CN116906399B (en) * | 2023-07-17 | 2024-04-19 | 杭州励贝电液科技有限公司 | Hydraulic proportional speed regulating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104295781B (en) | 2017-03-15 |
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Address after: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Applicant after: JIANGSU HENGLI HYDRAULIC CO., LTD. Address before: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Applicant before: JIANGSU HENGLI HYDRAULIC CO., LTD. |
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Effective date of registration: 20170519 Address after: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Co-patentee after: Changzhou Hengli Pneumatic Technology Co. Ltd. Patentee after: JIANGSU HENGLI HYDRAULIC CO., LTD. Address before: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Patentee before: JIANGSU HENGLI HYDRAULIC CO., LTD. |