CN102797717A - Safety type hydraulic lock for height adjustable hydraulic system of coal cutter - Google Patents
Safety type hydraulic lock for height adjustable hydraulic system of coal cutter Download PDFInfo
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- CN102797717A CN102797717A CN2011101393199A CN201110139319A CN102797717A CN 102797717 A CN102797717 A CN 102797717A CN 2011101393199 A CN2011101393199 A CN 2011101393199A CN 201110139319 A CN201110139319 A CN 201110139319A CN 102797717 A CN102797717 A CN 102797717A
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Abstract
The invention discloses a safety type hydraulic lock for a height adjustable hydraulic system of a coal cutter, comprising a first check valve, a second check valve, a first oil opening, a second oil opening, a third oil opening and a fourth oil opening, which are arranged in a valve body of the hydraulic lock, and further comprising a first safety valve and a second safety valve, which are arranged in the valve body of the hydraulic lock, wherein the first safety valve is connected with the fourth oil opening and the second safety valve is connected with the third oil opening; when an oil cavity which is connected with the third oil opening or the fourth oil opening reaches a certain pressure, the first safety valve and the second safety valve are turned on and an oil cavity connected with the third oil opening is connected with the second oil opening; and an oil cavity connected with the fourth oil opening is connected with the first oil opening. The safety type hydraulic lock disclosed by the invention can be used for protecting elements of the hydraulic system, protecting an oil pipe and preventing the oil pipe from bursting due to overhigh pressure; and the an oil cylinder can be protected and the damage to the oil cylinder due to the overhigh pressure can be avoided.
Description
Technical field
The present invention relates to a kind of coal winning machine height-regulating hydraulic system and use hydraulic lock, particularly a kind of coal winning machine height-regulating hydraulic system is used the safety type hydraulic lock.
Background technique
The use of hydraulic lock is very general on the hydraulic support that uses in the coal mining equipment in modern times, the coal winning machine; Normally used hydraulic lock structure is as shown in Figure 1, and its function in system is as shown in Figure 2, and first hydraulic fluid port, 31 ' hydraulic oil arrives the 3rd hydraulic fluid port 33 ' through one-way valve; And open the one-way valve of opposite side simultaneously; Arrive second hydraulic fluid port 32 ' from the 34 ' oil return of the 4th hydraulic fluid port through opened one-way valve, do not have at first hydraulic fluid port 31 ', second hydraulic fluid port 32 ' that one-way valve can not be opened under the hydraulic pressure oil condition, the fluid that has both connected the 3rd hydraulic fluid port 33 ', the 4th hydraulic fluid port 34 ' is lockable; Hydraulic lock of the prior art is too high and explosion takes place for tubing pressure; Oil cylinder working-pressure is too high and cause the situation of damage not have protective action, has caused the rising of equipment failure and cost, influences working efficiency.
Summary of the invention
The purpose of this invention is to provide the coal winning machine height-regulating hydraulic system and use the safety type hydraulic lock, can protect, can not only protect oil pipe, prevent overpressure and cause explosion the hydraulic system element; Can also protect oil cylinder, avoid oil cylinder working-pressure too high and cause damage, thereby the Security of coal winning machine, hydraulic support, stability are greatly improved.
In order to realize above purpose, the present invention realizes through following technological scheme:
A kind of coal winning machine height-regulating hydraulic system is used the safety type hydraulic lock, comprises in the valve body that is arranged on hydraulic lock: first, second one-way valve and first, second, third, fourth hydraulic fluid port; Also comprise in the valve body that is arranged on hydraulic lock:
First, second safety valve; Described first safety valve links to each other with described the 4th hydraulic fluid port; Second safety valve links to each other with described the 3rd hydraulic fluid port, and after the oil pocket that links to each other with the 3rd hydraulic fluid port or the 4th hydraulic fluid port reached certain pressure, described first, second safety valve was opened; The oil pocket that links to each other with the 3rd hydraulic fluid port links to each other with second hydraulic fluid port, and the oil pocket that links to each other with the 4th hydraulic fluid port links to each other with first hydraulic fluid port.
Also comprise: piston, described piston are arranged between first, second one-way valve and link to each other with first, second one-way valve respectively.
The valve pocket of described first, second one-way valve respectively and be provided with cavity between the piston.
The spool of described first, second one-way valve is provided with groove, and after first, second one-way valve opens, described groove communicates with the duct of valve inner, and hydraulic fluid port first hydraulic fluid port is communicated with the 3rd hydraulic fluid port, and second hydraulic fluid port communicates with the 4th hydraulic fluid port.
The present invention compared with prior art has the following advantages:
The present invention can protect the hydraulic system element owing to adopt safety valve, can not only protect oil pipe, prevents overpressure and causes explosion; Can also protect oil cylinder, avoid oil cylinder working-pressure too high and cause damage, thereby the Security of coal winning machine, hydraulic support, stability are greatly improved.
Description of drawings
Fig. 1 be in the existing technology coal winning machine height-regulating hydraulic system with the structural representation of hydraulic lock;
Fig. 2 be in the existing technology coal winning machine height-regulating hydraulic system with the functional diagram of hydraulic lock;
Fig. 3 is that a kind of coal winning machine height-regulating hydraulic system of the present invention is with safety type hydraulic lock structural representation;
Fig. 4 is the functional diagram of a kind of coal winning machine height-regulating hydraulic system of the present invention with the safety type hydraulic lock.
Embodiment
Below in conjunction with accompanying drawing,, the present invention is done further elaboration through specifying a preferable specific embodiment.
Like Fig. 3, shown in Figure 4; A kind of coal winning machine height-regulating hydraulic system is used the safety type hydraulic lock, comprises in the valve body 1 that is arranged on hydraulic lock: first, second one- way valve 21,22, piston 5, first, second safety valve 41,42 and first, second, third, fourth hydraulic fluid port 31,32,33,34.
Piston 5 is arranged on first, second one-way valve 21, also links to each other with first, second one- way valve 21,22 respectively between 22.Wherein, Be equipped with cavity between the valve pocket of first, second one- way valve 21,22 and the piston 5, the spool of first, second one- way valve 21,22 is provided with groove, when hydraulic oil gets into valve body 1 from first hydraulic fluid port 31; Hydraulic oil arrives the valve pocket of first one-way valve 21 and the cavity between the piston 5; The spool that hydraulic oil promotes first one-way valve 21 is moved to the left and pressure spring, opens the spool of first one-way valve 21, and the duct of the hydraulic fluid port 31 of winning through the groove on the spool, valve inner is connected with the 3rd hydraulic fluid port 33; Make hydraulic oil arrive the 3rd hydraulic fluid port 33, realize the oil-feed process of hydraulic oil from first hydraulic fluid port 31.When hydraulic oil promotes the spool of first one-way valve 21; Hydraulic oil can promote piston 5 and move right; The spool that piston 5 promotes second one-way valve 22 moves right and pressure spring, opens the spool of second one-way valve 22, makes second hydraulic fluid port 32 be connected with the 4th hydraulic fluid port 34 through the duct of the groove on the spool, valve inner; Make hydraulic oil arrive second hydraulic fluid port 32, realize the oil return process of hydraulic oil from the 4th hydraulic fluid port 34.
When not having hydraulic oil to arrive first hydraulic fluid port 31 or second hydraulic fluid port 32; Piston can move left and right; Can not open the spool of first, second one- way valve 21,22, then between the 3rd hydraulic fluid port 33 and first hydraulic fluid port 31, sealed by spool between the 4th hydraulic fluid port 34 and second hydraulic fluid port 32.In the present embodiment, first, second one- way valve 21,22 is selected guiding valve for use, and hydraulic oil is selected the hydraulic oil of high pressure for use.
First, second safety valve 41,42 links to each other with the 3rd hydraulic fluid port 33 with the 4th hydraulic fluid port 34 respectively, and when external load was too big, the oil pocket pressure that links to each other with the 3rd hydraulic fluid port 33 or the 4th hydraulic fluid port 34 can increase; In the present embodiment, after reaching 32MPa, hydraulic oil can act on through the gland center hole of safety valve on the spool of first, second safety valve 41,42; And promote this spool, and first, second safety valve 41,42 is opened, the oil pocket that then links to each other with the 3rd hydraulic fluid port 33 links to each other with second hydraulic fluid port 32; The oil pocket that links to each other with the 4th hydraulic fluid port 34 links to each other with first hydraulic fluid port 31, and at this moment, hydraulic oil can arrive second hydraulic fluid port 32 or first hydraulic fluid port 31; Realized the unloading of hydraulic oil; Avoided tubing pressure too high and explosion takes place, avoided the too high and damage that causes of oil cylinder working-pressure, thereby guaranteed that oil pipe, oil cylinder work in the safety pressure scope.In the present embodiment, first, second safety valve 41,42 is selected cone valve for use.
Certainly, in the present embodiment, first, second one- way valve 21,22 and first, second safety valve 41,42 are for being symmetrical set, and the oil-feed path and the oil return path of hydraulic oil also can exchange.
In sum, a kind of coal winning machine height-regulating hydraulic system of the present invention is used the safety type hydraulic lock, can protect the hydraulic system element, can not only protect oil pipe, prevents overpressure and causes explosion; Can also protect oil cylinder, avoid oil cylinder working-pressure too high and cause damage.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (4)
1. a coal winning machine height-regulating hydraulic system is used the safety type hydraulic lock, comprises in the valve body (1) that is arranged on hydraulic lock: first, second one-way valve (21,22) and first, second, third, fourth hydraulic fluid port (31,32,33,34); It is characterized in that, also comprise in the valve body (1) that is arranged on hydraulic lock:
First, second safety valve (41,42); Described first safety valve (41) links to each other with described the 4th hydraulic fluid port (34); Second safety valve (42) links to each other with described the 3rd hydraulic fluid port (33); After the oil pocket that links to each other with the 3rd hydraulic fluid port (33) or the 4th hydraulic fluid port (34) reaches certain pressure; Described first, second safety valve (41,42) is opened, and the oil pocket that links to each other with the 3rd hydraulic fluid port (33) links to each other with second hydraulic fluid port (32), and the oil pocket that links to each other with the 4th hydraulic fluid port (34) links to each other with first hydraulic fluid port (31).
2. coal winning machine height-regulating hydraulic system according to claim 1 is used the safety type hydraulic lock; It is characterized in that; Also comprise: piston (5), described piston (5) are arranged between first, second one-way valve (21,22) and link to each other with first, second one-way valve (21,22) respectively.
3. coal winning machine height-regulating hydraulic system according to claim 2 is used the safety type hydraulic lock, it is characterized in that, the valve pocket of described first, second one-way valve (21) is provided with cavity respectively and between the piston (5).
4. coal winning machine height-regulating hydraulic system according to claim 1 is used the safety type hydraulic lock; It is characterized in that; The spool of described first, second one-way valve (21,22) is provided with groove, and after first, second one-way valve (21,22) was opened, described groove communicated with the inner duct of valve body (1); Hydraulic fluid port first hydraulic fluid port (31) is communicated with the 3rd hydraulic fluid port (33), and second hydraulic fluid port (32) communicates with the 4th hydraulic fluid port (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110139319.9A CN102797717B (en) | 2011-05-27 | 2011-05-27 | Safety type hydraulic lock for height adjustable hydraulic system of coal cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110139319.9A CN102797717B (en) | 2011-05-27 | 2011-05-27 | Safety type hydraulic lock for height adjustable hydraulic system of coal cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102797717A true CN102797717A (en) | 2012-11-28 |
| CN102797717B CN102797717B (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110139319.9A Active CN102797717B (en) | 2011-05-27 | 2011-05-27 | Safety type hydraulic lock for height adjustable hydraulic system of coal cutter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374947A (en) * | 2019-07-09 | 2019-10-25 | 浙江科力车辆控制系统有限公司 | Oil cylinder with two-way linkage locking function |
| CN111022400A (en) * | 2020-03-06 | 2020-04-17 | 山东交通职业学院 | Hydraulic bidirectional lock convenient for pressure relief |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4669494A (en) * | 1986-08-13 | 1987-06-02 | Teleflex Incorporated | Hydraulic lock valve with partial return to tank for marine steering |
| CN201433950Y (en) * | 2009-04-10 | 2010-03-31 | 竺浩君 | Bidirectional hydraulic lock for connecting pipelines with pressure maintaining effect |
| CN201496335U (en) * | 2009-09-09 | 2010-06-02 | 四川神坤装备股份有限公司 | Automatic balancing valve |
-
2011
- 2011-05-27 CN CN201110139319.9A patent/CN102797717B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4669494A (en) * | 1986-08-13 | 1987-06-02 | Teleflex Incorporated | Hydraulic lock valve with partial return to tank for marine steering |
| CN201433950Y (en) * | 2009-04-10 | 2010-03-31 | 竺浩君 | Bidirectional hydraulic lock for connecting pipelines with pressure maintaining effect |
| CN201496335U (en) * | 2009-09-09 | 2010-06-02 | 四川神坤装备股份有限公司 | Automatic balancing valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374947A (en) * | 2019-07-09 | 2019-10-25 | 浙江科力车辆控制系统有限公司 | Oil cylinder with two-way linkage locking function |
| CN111022400A (en) * | 2020-03-06 | 2020-04-17 | 山东交通职业学院 | Hydraulic bidirectional lock convenient for pressure relief |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102797717B (en) | 2015-04-08 |
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