CN102963834B - The stroke position limiting valve of hydraulic hoisting apparatus - Google Patents
The stroke position limiting valve of hydraulic hoisting apparatus Download PDFInfo
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- CN102963834B CN102963834B CN201210459929.1A CN201210459929A CN102963834B CN 102963834 B CN102963834 B CN 102963834B CN 201210459929 A CN201210459929 A CN 201210459929A CN 102963834 B CN102963834 B CN 102963834B
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- valve
- fluid port
- hydraulic fluid
- hydraulic
- lifting motor
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Abstract
A kind of stroke position limiting valve of hydraulic hoisting apparatus, comprise the valve that contends with, shuttle valve, change-over valve, the first check valve, the second check valve, the first hydraulic control one-way valve, the second hydraulic control one-way valve and three hydraulic fluid ports and be respectively hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port H, described stroke position limiting valve is connected with the lifting motor of band hydraulic braking sheet; Described hydraulic fluid port A and hydraulic fluid port B is the hydraulic fluid port of working connection, and described hydraulic fluid port H is motor drain tap; The limit function of hydraulic hoisting apparatus is realized by the trend of change-over valve switching oil circuit.Beneficial effect: of the present invention can accomplish spacing accurately and reliably, be active in one's movements, debug easy, keep in repair easy, durable in use, easy for installation, cost is low, practical.
Description
Technical field
The present invention relates to a kind of distance caging device of hydraulic hoisting apparatus, particularly a kind of stroke position limiting valve of hydraulic hoisting apparatus.
Background technology
At present, general weight-lifting equipment is all with distance caging device, and the stroke limiter that hoists conventional in elevator machinery class safety guard has weight hammer type, coding type and driving type etc. several.Heavy hammer type lifting stroke limiter have employed suspension hook and collides the principle that lever makes counter weight balanced type switch motion when the rising limit, there is the shortcomings such as fragile, poor reliability, maintenance are large.The hoist coder of stroke limiter and drum shaft of coding type joins, and exports pulse code accurate representation reel revolution and angle, there is the shortcomings such as poor reliability, maintenance is large, cost is higher equally.The hoist reductor of stroke limiter of driving type is connected with drum shaft, and selecting transmitting ratio to make worm gear wheel shaft upper-part make switch motion when control position, is a kind of modal distance caging device.Its Typical Representative is as the patent No.: ZL200520111759.3 Cam type lifting device is Typical Representative, its hydraulic stop is that LS mouth connection limit valve carries out spacing from the working oil path of manual apportioning valve, Costco Wholesale is high, usage range is little, pipeline is long, expose outside that it is malfunctioning easily to get rusty outside limit valve although it is convenient that it regulates! Also have its apportioning valve itself to require very high, little of usage range is practically applicable to the apportioning valve of manual apportioning valve working oil path band LS mouth, and this is much more expensive than the apportioning valve price not with LS mouth same specification model.Also have the working oil path of apportioning valve of part brand not to be with LS mouth, just having no idea carries out hoisting carry out up and down spacing.
Summary of the invention
Goal of the invention: for weak point of the prior art, a kind of stroke position limiting valve of hydraulic hoisting apparatus is provided, this stroke position limiting valve can accomplish spacing accurately and reliably, be active in one's movements, debug easy, keep in repair easy, durable in use, easy for installation, cost is low, practical.
Technical scheme: a kind of stroke position limiting valve of hydraulic hoisting apparatus, comprise the valve that contends with, shuttle valve, change-over valve, the first check valve, the second check valve, the first hydraulic control one-way valve, the second hydraulic control one-way valve and three hydraulic fluid ports and be respectively hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port H, described stroke position limiting valve is connected with the lifting motor of band hydraulic braking sheet; Described hydraulic fluid port A and hydraulic fluid port B is the hydraulic fluid port of working connection, and described hydraulic fluid port H is motor drain tap; The described valve that contends with is connected with hydraulic fluid port A with after shuttle valve parallel connection, described hydraulic fluid port A is connected by valve and the lifting motor main hydraulic fluid port that contends with, described hydraulic fluid port B is connected with another main hydraulic fluid port of lifting motor, the drain tap of described lifting motor is connected with hydraulic fluid port H, the oil outlet of described shuttle valve is connected with hydraulic braking sheet and change-over valve respectively, another oil inlet of described shuttle valve is connected with hydraulic fluid port B, described in the contend with hydraulic fluid port that contends with of valve be connected with hydraulic fluid port B; Described first check valve is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the first hydraulic control one-way valve, and the first check valve is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, and the first hydraulic control one-way valve is from hydraulic fluid port A to hydraulic fluid port B one-way conduction; Described second check valve is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the second hydraulic control one-way valve, and the second check valve is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, and the second hydraulic control one-way valve is from hydraulic fluid port B to hydraulic fluid port A one-way conduction; Described first hydraulic control one-way valve is connected with change-over valve respectively with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve, and another hydraulic fluid port of described change-over valve is connected with hydraulic fluid port H; Described first hydraulic control one-way valve is connected with the oil outlet of shuttle valve by change-over valve with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve.
Principle of work: when hoisting, fluid enters in valve body from hydraulic fluid port A, the hydraulic braking sheet of retarder is opened through shuttle valve, then through contending with valve Free to A1 point, fluid enters lifting motor, and lifting motor rotates, and fluid is other flatly to B1 point from lifting motor, then flow out from hydraulic fluid port B, lifting motor draining is from H mouth oil sump tank.When change-over valve encounters upper limit, originally the fluid flowing to hydraulic braking sheet flows to change-over valve through C point, then U point is flowed to through change-over valve, flow to the signal port of the second hydraulic control one-way valve again, the second hydraulic control one-way valve is connected, now, fluid flows out through hydraulic fluid port B through the second hydraulic control one-way valve and the second check valve successively from hydraulic fluid port A, therefore lifting motor does not have fluid to pass through, and lifting motor just quits work, and reaches upper limit effect.Otherwise during decline, oil circuit opens hydraulic braking sheet from hydraulic fluid port B through shuttle valve, and fluid directly enters lifting motor, lifting motor rotates, and when normally running, fluid flows out from hydraulic fluid port A through B1 point, A1 point and the valve that contends with successively from hydraulic fluid port B; The valve that now contends with needs to overcome gravity and declines, and plays and prevents hoisting heavy free fall.When change-over valve encounters upper limit, originally the fluid flowing to hydraulic braking sheet flows to change-over valve by C point, then flow to L point through change-over valve successively, then flow to the signal port of the first hydraulic control one-way valve, the first hydraulic control one-way valve is connected, now, fluid flows out through hydraulic fluid port A through the first hydraulic control one-way valve and the first check valve successively from hydraulic fluid port B, and therefore lifting motor does not have fluid to pass through, lifting motor just quits work, and reaches lower limit effect.
Beneficial effect: of the present invention can accomplish spacing accurately and reliably, be active in one's movements, debug easy, keep in repair easy, durable in use, easy for installation, cost is low, practical.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in the figure, a kind of stroke position limiting valve of hydraulic hoisting apparatus, comprise the valve 1 that contends with, shuttle valve 2, change-over valve 3, first check valve 4, second check valve 5, first hydraulic control one-way valve 6, second hydraulic control one-way valve 7 and three hydraulic fluid ports and be respectively hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port H, described stroke position limiting valve is connected with the lifting motor 9 of band hydraulic braking sheet 8; Described hydraulic fluid port A and hydraulic fluid port B is the hydraulic fluid port of working connection, and described hydraulic fluid port H is motor drain tap; Be connected with hydraulic fluid port A after the described valve 1 that contends with is in parallel with shuttle valve 2, described hydraulic fluid port A is connected by valve 1 and lifting motor 9 one the main hydraulic fluid ports that contend with, described hydraulic fluid port B is connected with another main hydraulic fluid port of lifting motor 9, the drain tap of described lifting motor 9 is connected with hydraulic fluid port H, the oil outlet of described shuttle valve 2 is connected with hydraulic braking sheet 8 and change-over valve 3 respectively, another oil inlet of described shuttle valve 2 is connected with hydraulic fluid port B, described in the contend with hydraulic fluid port that contends with of valve 1 be connected with hydraulic fluid port B; Described first check valve 4 is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the first hydraulic control one-way valve 6, and the first check valve 4 is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, and the first hydraulic control one-way valve 6 is from hydraulic fluid port A to hydraulic fluid port B one-way conduction; Described second check valve 5 is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the second hydraulic control one-way valve 7, and the second check valve 5 is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, and the second hydraulic control one-way valve 7 is from hydraulic fluid port B to hydraulic fluid port A one-way conduction; Described first hydraulic control one-way valve 6 is connected with change-over valve 3 respectively with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve 7, and described another hydraulic fluid port of change-over valve 3 is connected with hydraulic fluid port H; Described first hydraulic control one-way valve 6 is connected by the oil outlet of change-over valve 3 with shuttle valve 2 with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve 7.
Principle of work: when hoisting, fluid enters in valve body from hydraulic fluid port A, hydraulic braking sheet 8 is opened through shuttle valve 2, then through contending with valve 1 Free to A1 point, fluid enters lifting motor 9, and lifting motor 9 rotates, and fluid is other flatly to B1 point from lifting motor 9, then flow out from hydraulic fluid port B, lifting motor 9 draining is from H mouth oil sump tank.When change-over valve 3 encounters upper limit, originally the fluid flowing to hydraulic braking sheet 8 flows to change-over valve 3 through C point, then U point is flowed to through change-over valve 3, flow to the signal port of the second hydraulic control one-way valve 7 again, the second hydraulic control one-way valve 7 is connected, now, fluid flows out through hydraulic fluid port B through the second hydraulic control one-way valve 7 and the second check valve 5 successively from hydraulic fluid port A, therefore lifting motor 9 does not have fluid to pass through, and lifting motor 9 just quits work, and reaches upper limit effect.Otherwise during decline, oil circuit opens hydraulic braking sheet 8 from hydraulic fluid port B through shuttle valve 2, and fluid directly enters lifting motor 9, and lifting motor 9 rotates, when normally running, fluid flows out from hydraulic fluid port A through B1 point, A1 point and the valve 1 that contends with successively from hydraulic fluid port B; The valve 1 that now contends with needs to overcome gravity and declines, and plays and prevents hoisting heavy free fall.When change-over valve 3 encounters upper limit, originally the fluid of hydraulic braking sheet 8 flows to change-over valve 3 by C point, then flow to L point through change-over valve 3 successively, then flow to the signal port of the first hydraulic control one-way valve 6, the first hydraulic control one-way valve 6 is connected, now, fluid flows out through hydraulic fluid port A through the first hydraulic control one-way valve 6 and the first check valve 4 successively from hydraulic fluid port B, and therefore lifting motor 9 does not have fluid to pass through, lifting motor 9 just quits work, and reaches lower limit effect.
Claims (1)
1. the stroke position limiting valve of a hydraulic hoisting apparatus, it is characterized in that: comprise the valve that contends with (1), shuttle valve (2), change-over valve (3), the first check valve (4), the second check valve (5), the first hydraulic control one-way valve (6), the second hydraulic control one-way valve (7) and three hydraulic fluid ports and be respectively hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port H, described stroke position limiting valve is connected with the lifting motor (9) of band hydraulic braking sheet (8); Described hydraulic fluid port A and hydraulic fluid port B is the hydraulic fluid port of working connection, and described hydraulic fluid port H is motor drain tap; Be connected with hydraulic fluid port A after the described valve that contends with (1) is in parallel with shuttle valve (2), described hydraulic fluid port A is connected by the valve that contends with (1) and lifting motor (9) main hydraulic fluid ports, described hydraulic fluid port B is connected with another main hydraulic fluid port of lifting motor (9), the drain tap of described lifting motor (9) is connected with hydraulic fluid port H, the oil outlet of described shuttle valve (2) is connected with hydraulic braking sheet (8) and change-over valve (3) respectively, another oil inlet of described shuttle valve (2) is connected with hydraulic fluid port B, described in the contend with hydraulic fluid port that contends with of valve (1) be connected with hydraulic fluid port B; Described first check valve (4) is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the first hydraulic control one-way valve (6), and the first check valve (4) is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, and the first hydraulic control one-way valve (6) is from hydraulic fluid port A to hydraulic fluid port B one-way conduction; Described second check valve (5) is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the second hydraulic control one-way valve (7), and the second check valve (5) is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, and the second hydraulic control one-way valve (7) is from hydraulic fluid port B to hydraulic fluid port A one-way conduction; Described first hydraulic control one-way valve (6) is connected with change-over valve (3) respectively with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve (7), and described change-over valve (3) another hydraulic fluid port is connected with hydraulic fluid port H; Described first hydraulic control one-way valve (6) is connected by the oil outlet of change-over valve (3) with shuttle valve (2) with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve (7); When hoisting, fluid enters in valve body from hydraulic fluid port A, the hydraulic braking sheet of retarder is opened through shuttle valve, then through contending with valve Free to A1 point, fluid enters lifting motor, and lifting motor rotates, and fluid is other flatly to B1 point from lifting motor, then flow out from hydraulic fluid port B, lifting motor draining is from H mouth oil sump tank;
When change-over valve encounters upper limit, originally the fluid flowing to hydraulic braking sheet flows to change-over valve through C point, then U point is flowed to through change-over valve, flow to the signal port of the second hydraulic control one-way valve again, the second hydraulic control one-way valve is connected, now, fluid flows out through hydraulic fluid port B through the second hydraulic control one-way valve and the second check valve successively from hydraulic fluid port A, therefore lifting motor does not have fluid to pass through, and lifting motor just quits work, and reaches upper limit effect;
Otherwise during decline, fluid opens hydraulic braking sheet from hydraulic fluid port B through shuttle valve, and fluid directly enters lifting motor, lifting motor rotates, and when normally running, fluid flows out from hydraulic fluid port A through B1 point, A1 point and the valve that contends with successively from hydraulic fluid port B; The valve that now contends with needs to overcome gravity and declines, and plays and prevents hoisting heavy free fall;
When change-over valve encounters lower limit, originally the fluid flowing to hydraulic braking sheet flows to change-over valve by C point, then L point is flowed to through change-over valve successively, flow to the signal port of the first hydraulic control one-way valve again, the first hydraulic control one-way valve is connected, now, fluid flows out through hydraulic fluid port A through the first hydraulic control one-way valve and the first check valve successively from hydraulic fluid port B, therefore lifting motor does not have fluid to pass through, and lifting motor just quits work, and reaches lower limit effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210459929.1A CN102963834B (en) | 2012-11-15 | 2012-11-15 | The stroke position limiting valve of hydraulic hoisting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210459929.1A CN102963834B (en) | 2012-11-15 | 2012-11-15 | The stroke position limiting valve of hydraulic hoisting apparatus |
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| Publication Number | Publication Date |
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| CN102963834A CN102963834A (en) | 2013-03-13 |
| CN102963834B true CN102963834B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210459929.1A Expired - Fee Related CN102963834B (en) | 2012-11-15 | 2012-11-15 | The stroke position limiting valve of hydraulic hoisting apparatus |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201301975Y (en) * | 2008-09-17 | 2009-09-02 | 徐州重型机械有限公司 | Liquid proportional pressure-reducing valve, valve bank, suspension arm and hoisting hydraulic control system |
| CN201647868U (en) * | 2009-11-24 | 2010-11-24 | 镇江维斯特船用设备有限公司(外商独资) | Novel hydraulic winch |
| CN102030267A (en) * | 2011-01-17 | 2011-04-27 | 徐州重型机械有限公司 | Hoist and closed hydraulic system thereof |
| CN202912617U (en) * | 2012-11-15 | 2013-05-01 | 江苏威和重工有限公司 | Stroke limiting valve of hydraulic hoisting equipment |
-
2012
- 2012-11-15 CN CN201210459929.1A patent/CN102963834B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201301975Y (en) * | 2008-09-17 | 2009-09-02 | 徐州重型机械有限公司 | Liquid proportional pressure-reducing valve, valve bank, suspension arm and hoisting hydraulic control system |
| CN201647868U (en) * | 2009-11-24 | 2010-11-24 | 镇江维斯特船用设备有限公司(外商独资) | Novel hydraulic winch |
| CN102030267A (en) * | 2011-01-17 | 2011-04-27 | 徐州重型机械有限公司 | Hoist and closed hydraulic system thereof |
| CN202912617U (en) * | 2012-11-15 | 2013-05-01 | 江苏威和重工有限公司 | Stroke limiting valve of hydraulic hoisting equipment |
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| Publication number | Publication date |
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| CN102963834A (en) | 2013-03-13 |
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Effective date of registration: 20151009 Address after: 212219 Jiangsu province Yangzhong City eight Town Bridge Industrial Zone Bridge Hotel Applicant after: Yu Xiaobing Address before: 212219 Jiangsu city of Zhenjiang province Yangzhong City Bridge Industrial Zone Applicant before: Jiangsu Weihe Heavy Industry Co., Ltd. |
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Granted publication date: 20151209 Termination date: 20181115 |
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