CN102963830B - Hydraulic hoisting apparatus - Google Patents
Hydraulic hoisting apparatus Download PDFInfo
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- CN102963830B CN102963830B CN201210460211.4A CN201210460211A CN102963830B CN 102963830 B CN102963830 B CN 102963830B CN 201210460211 A CN201210460211 A CN 201210460211A CN 102963830 B CN102963830 B CN 102963830B
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Abstract
A kind of hydraulic hoisting apparatus, comprise the balance valve block that hoists, lifting motor, retarder, reel and range limiter, the described balance valve block that hoists controls the action of lifting motor, lifting motor is by the rotation of retarder band movable reel, and described range limiter is fixed on reel side and controls to hoist according to the position degree of reel the state of balance valve block.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 hydraulic hoisting apparatus, particularly a kind of hydraulic hoisting apparatus with distance caging device.
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, provides a kind of hydraulic hoisting apparatus, this hydraulic hoisting apparatus 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 hydraulic hoisting apparatus, comprise the balance valve block that hoists, lifting motor, retarder, reel and range limiter, the described balance valve block that hoists controls the action of lifting motor, lifting motor is by the rotation of retarder band movable reel, and described range limiter is fixed on reel side and controls to hoist according to the position degree of reel the state of balance valve block.The present invention is by the stroke of range limiter setting weight-lifting equipment; When reach capacity position time, cut off by the oil circuit in balance valve block that controls to hoist and enter the fluid of lifting motor and then realize the limit function of this equipment.
In order to improve spacing accuracy and reliability, described retarder comprises brake plate, described in the balance valve block that hoists comprise three hydraulic fluid ports and be respectively hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port H, 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 balance valve block that hoists comprises the valve that contends with, shuttle valve, change-over valve, first check valve, second check valve, first hydraulic control one-way valve and the second hydraulic control one-way valve, 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 brake plate and change-over valve respectively, another oil inlet of described shuttle valve is connected with hydraulic fluid port B, the hydraulic fluid port that contends with of the described valve that contends with is 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, another hydraulic fluid port of described change-over valve is connected with hydraulic fluid port H, the commutation of described change-over valve is controlled by range limiter, and described first hydraulic control one-way valve and the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve can be selected to be connected with the oil outlet of shuttle valve under the effect of change-over valve.
The principle of work of the balance valve block that hoists: when hoisting, fluid enters in valve body from hydraulic fluid port A, the brake plate 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 brake plate 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 the brake plate of retarder through shuttle valve from hydraulic fluid port B, 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 brake plate 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.
A range limiter is installed in reel side, control hoists forced stroke, and then make, with erecting equipment, there is good limit function, accomplish spacing accurately and reliably, be active in one's movements, debug easy, keep in repair easy, durable in use, easy for installation and volume is little, cost is low, practical.
Range limiter preferred version one: the trip limiting device can realize bidirectionally limited, described reel comprises drum shaft; Described change-over valve comprises valve body and contact lever; Described range limiter comprises limiting device housing, screw rod, hits a plate, guide rod, lower limiting board, upper limit plate and rocking bar, described screw rod is connected with drum shaft by screw thread, a described plate rotary type that hits is fixed on screw rod end, described guide rod is fixedly mounted on limiting device housing, the center of described guide rod and the center parallel of drum shaft, described guide rod is through hitting a plate top; Described rocking bar is fixedly connected with the contact lever of change-over valve, and described upper limit plate is fixed on lower limiting board and forms " F " shape structure, and the middle part that described rocking bar is fixed on lower limiting board forms fork configuration; Described bottom of hitting a plate is between lower limiting board and upper limit plate.
Conveniently regulate stroke-limit, described lower limiting board comprises the elongate slots on limiting section, base plate and base plate, described limiting section is vertical with base plate, described upper limit plate is fixedly connected with lower limiting board by elongate slots, described rocking bar is fixedly connected with lower limiting board by elongate slots, and rocking bar junction is between upper limit plate and limiting section.
In order to realize accurate limiting, described top of hitting a plate is provided with can through the pilot hole of guide rod, described center of hitting a plate is provided with the stepped hole be connected with screw rod rotary type, described in hit a plate bottom be provided with the limited step contacted with upper limit plate with lower limiting board.
Range limiter principle of work: drum shaft is fixed on reel side, screw rod is threaded connection in drum shaft, screw rod then with drum shaft synchronous axial system, the distance of motion that hoists and the revolution direct proportionality of reel, and drum shaft rotates a circle, in a screw rod just mobile pitch in drum shaft endoporus.Hit a plate and be fixed on screw rod side, screw rod hits a plate by the constraint of guide rod, can not rotate around screw axis, be merely able to move forward and backward with screw rod.Therefore, hoist motion distance just with the distance also direct proportionality hitting plate movement on screw rod.Therefore, when determining the uplink and downlink qualifying bit postpone hoisted as required, the ultimate range of hitting a plate corresponding permission movement on screw rod just can be calculated.Hitting a plate moves when will surmount this distance, and will promote to be connected to the upper limit plate on change-over valve or lower limiting board, upper limit plate is connected on lower limiting board, and lower limiting board is opened an elongate slots and regulated lower limit distance to facilitate.Therefore, when determining the uplink and downlink qualifying bit postpone hoisted as required, the elongate slots just by lower limiting board regulates the ultimate range of hitting a plate corresponding permission movement.Hitting a plate moves when will surmount this distance, the contact lever of change-over valve will be promoted, hydraulic circuit is connected and namely flows to the first hydraulic control one-way valve or the second hydraulic control one-way valve, cause hydraulic oil by lifting motor, thus the stop motion that hoists running to the upper limit or lower position cannot be made.Now, spool turns rotates backward only.
Range limiter preferred version two: the trip limiting device can only realize unidirectional spacing, described reel comprises drum shaft; Described change-over valve comprises valve body and contact lever; Described range limiter comprises limiting device housing, screw rod, hits a plate, guide rod, rocking bar and spacing spheroid, described screw rod is connected with drum shaft by screw thread, a described plate rotary type that hits is fixed on screw rod end, described guide rod is fixedly mounted on limiting device housing, the center of described guide rod and the center parallel of drum shaft, described guide rod is through hitting a plate top; Described rocking bar is fixedly connected with the contact lever of change-over valve, and described spacing spheroid is fixed on the upper end of rocking bar; A described plate bottom of hitting is provided with the spacing inclined-plane contacted with spacing spheroid.
Range limiter principle of work: drum shaft is fixed on reel side, screw rod is threaded connection in drum shaft, screw rod then with drum shaft synchronous axial system, the distance of motion that hoists and the revolution direct proportionality of reel, and drum shaft rotates a circle, in a screw rod just mobile pitch in drum shaft endoporus.Hit a plate and be fixed on screw rod side, screw rod hits a plate by the constraint of guide rod, can not rotate around screw axis, be merely able to move forward and backward with screw rod.Therefore, hoist motion distance just with the distance also direct proportionality hitting plate movement on screw rod.Therefore, when determining a certain qualifying bit postpone hoisted as required, the ultimate range of hitting a plate corresponding permission movement on screw rod just can be calculated.Hitting a plate moves when will surmount this distance, the spacing spheroid be connected on change-over valve will be promoted, and then promote the contact lever of change-over valve, hydraulic circuit is connected and namely flows to the first hydraulic control one-way valve or the second hydraulic control one-way valve, cause hydraulic oil by lifting motor, thus the stop motion that hoists running to the upper limit or lower position cannot be made.Now, spool turns rotates backward only.
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 overall structure schematic diagram of the present invention;
Fig. 2 is that the present invention hoists the hydraulic schematic diagram of balance valve block;
Fig. 3 is the first exemplary construction schematic diagram of range limiter of the present invention;
Fig. 4 is the first example lower limit position plate structure schematic diagram of range limiter of the present invention;
Fig. 5 hits a plate structure schematic diagram in the first example of range limiter of the present invention;
Fig. 6 is the second exemplary construction schematic diagram of range limiter of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment one
As Figure 1-5, a kind of hydraulic hoisting apparatus, comprise the balance valve block 1 that hoists, lifting motor 2, retarder 3, reel 4 and range limiter 5, the described balance valve block 1 that hoists controls the action of lifting motor 2, lifting motor 2 is by the rotation of retarder 3 with movable reel 4, and described range limiter 5 is fixed on reel 4 side and controls to hoist according to the position degree of reel 4 state of balance valve block 1.The present invention sets the stroke of weight-lifting equipment by range limiter 5; When reach capacity position time, cut off by the oil circuit in balance valve block 1 that controls to hoist and enter the fluid of lifting motor 2 and then realize the limit function of this equipment.
In order to improve spacing accuracy and reliability, described retarder 3 comprises brake plate 6, the described balance valve block 1 that hoists comprises three hydraulic fluid ports and is respectively hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port H, and 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 balance valve block 1 that hoists comprises the valve 11 that contends with, shuttle valve 12, change-over valve 13, first check valve 14, second check valve 15, first hydraulic control one-way valve 16 and the second hydraulic control one-way valve 17, be connected with hydraulic fluid port A after the described valve 11 that contends with is in parallel with shuttle valve 12, described hydraulic fluid port A is connected by valve 11 and lifting motor 2 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 2, the drain tap of described lifting motor 2 is connected with hydraulic fluid port H, the oil outlet of described shuttle valve 12 is connected with brake plate 6 and change-over valve 13 respectively, another oil inlet of described shuttle valve 12 is connected with hydraulic fluid port B, the hydraulic fluid port that contends with of the described valve 11 that contends with is connected with hydraulic fluid port B, described first check valve 14 is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the first hydraulic control one-way valve 16, and the first check valve 14 is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, and the first hydraulic control one-way valve 16 is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, described second check valve 15 is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the second hydraulic control one-way valve 17, and the second check valve 15 is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, and the second hydraulic control one-way valve 17 is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, described first hydraulic control one-way valve 16 is connected with change-over valve 13 respectively with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve 17, described another hydraulic fluid port of change-over valve 13 is connected with hydraulic fluid port H, the commutation of described change-over valve 13 is controlled by range limiter 5, and described first hydraulic control one-way valve 16 and the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve 17 can be selected to be connected with the oil outlet of shuttle valve 12 under the effect of change-over valve 13.
The principle of work of the balance valve block that hoists 1: when hoisting, fluid enters in valve body from hydraulic fluid port A, the brake plate 6 of retarder 3 is opened through shuttle valve 12, then through contending with valve 11 Free to A1 point, fluid enters lifting motor 2, and lifting motor 2 rotates, and fluid is other flatly to B1 point from lifting motor 2, then flow out from hydraulic fluid port B, lifting motor 2 draining is from H mouth oil sump tank.When change-over valve 13 encounters upper limit, originally the fluid flowing to brake plate 6 flows to change-over valve 13 through C point, then U point is flowed to through change-over valve 13, flow to the signal port of the second hydraulic control one-way valve 17 again, the second hydraulic control one-way valve 17 is connected, now, fluid flows out through hydraulic fluid port B through the second hydraulic control one-way valve 17 and the second check valve 15 successively from hydraulic fluid port A, therefore lifting motor 2 does not have fluid to pass through, and lifting motor 2 just quits work, and reaches upper limit effect.Otherwise during decline, oil circuit opens the brake plate 6 of retarder 3 through shuttle valve 12 from hydraulic fluid port B, fluid directly enters lifting motor 2, and lifting motor 2 rotates, when normally running, fluid flows out from hydraulic fluid port A through B1 point, A1 point and the valve 11 that contends with successively from hydraulic fluid port B; The valve 11 that now contends with needs to overcome gravity and declines, and plays and prevents hoisting heavy free fall.When change-over valve 13 encounters upper limit, originally the fluid flowing to brake plate 6 flows to change-over valve 13 by C point, then flow to L point through change-over valve 13 successively, then flow to the signal port of the first hydraulic control one-way valve 16, the first hydraulic control one-way valve 16 is connected, now, fluid flows out through hydraulic fluid port A through the first hydraulic control one-way valve 16 and the first check valve 14 successively from hydraulic fluid port B, and therefore lifting motor 2 does not have fluid to pass through, lifting motor 2 just quits work, and reaches lower limit effect.
In reel 4 side, a range limiter 5 is installed, control hoists forced stroke, and then make, with erecting equipment, there is good limit function, accomplish spacing accurately and reliably, be active in one's movements, debug easy, keep in repair easy, durable in use, easy for installation and volume is little, cost is low, practical.
This range limiter 5 can realize bidirectionally limited, and described reel 4 comprises drum shaft 41; Described change-over valve 13 comprises valve body 131 and contact lever 132; Described range limiter 5 comprises limiting device housing 51, screw rod 52, hits a plate 53, guide rod 54, lower limiting board 55, upper limit plate 56 and rocking bar 57, described screw rod 52 is connected with drum shaft 41 by screw thread, a described plate 53 rotary type that hits is fixed on screw rod 52 end, described guide rod 54 is fixedly mounted on limiting device housing 51, the center of described guide rod 54 and the center parallel of drum shaft 41, described guide rod 54 is through hitting a plate 53 top; Described rocking bar 57 is fixedly connected with the contact lever 132 of change-over valve 13, and described upper limit plate 56 is fixed on lower limiting board 55 and forms " F " shape structure, and the middle part that described rocking bar 57 is fixed on lower limiting board 55 forms fork configuration; Described bottom of hitting a plate 53 is between lower limiting board 55 and upper limit plate 56.
Conveniently regulate stroke-limit, described lower limiting board 55 comprises the elongate slots 553 on limiting section 551, base plate 552 and base plate 552, described limiting section 551 is vertical with base plate 552, described upper limit plate 56 is fixedly connected with lower limiting board 55 by elongate slots 553, described rocking bar 57 is fixedly connected with lower limiting board 55 by elongate slots 553, and rocking bar 57 junction is between upper limit plate 56 and limiting section 551.
In order to realize accurate limiting, described top of hitting a plate 53 is provided with can through the pilot hole 531 of guide rod 54, described center of hitting a plate 53 is provided with the stepped hole 532 be connected with screw rod 52 rotary type, described in hit a plate 53 bottom be provided with the limited step 533 contacted with upper limit plate 56 with lower limiting board 55.
Range limiter 5 principle of work: drum shaft 41 is fixed on reel 4 side, screw rod 52 is threaded connection in drum shaft 41, screw rod 52 and drum shaft 41 synchronous axial system, the distance of motion that hoists and the revolution direct proportionality of reel 4, and drum shaft 41 rotates a circle, in a screw rod 52 just mobile pitch in drum shaft 41 endoporus.Hit a plate 53 and be fixed on screw rod 52 side, screw rod 52 hits a plate 53 constraint by guide rod 54, can not rotate around screw rod 52 axis, be merely able to screw rod 52 movable.Therefore, hoist motion distance just with the distance also direct proportionality hitting a plate 53 movement on screw rod 52.Therefore, when determining the uplink and downlink qualifying bit postpone hoisted as required, the ultimate range of hitting a plate 53 corresponding permission movement on screw rod 52 just can be calculated.Hitting a plate 53 moves when will surmount this distance, and will promote to be connected to the upper limit plate 56 on change-over valve 13 or lower limiting board 55, upper limit plate 56 is connected on lower limiting board 55, and lower limiting board 55 is opened an elongate slots 553 and regulated lower limit distance to facilitate.Therefore, when determining the uplink and downlink qualifying bit postpone hoisted as required, the elongate slots 553 just by lower limiting board 55 regulates the ultimate range of hitting a plate 53 corresponding permission movement.Hitting a plate 53 moves when will surmount this distance, the contact lever 132 of change-over valve 13 will be promoted, hydraulic circuit is connected and namely flows to the first hydraulic control one-way valve 16 or the second hydraulic control one-way valve 17, cause hydraulic oil by lifting motor 2, thus the stop motion that hoists running to the upper limit or lower position cannot be made.Now, reel 4 rotates and rotates backward only.
Embodiment two
As shown in Fig. 1,2,6, a kind of hydraulic hoisting apparatus, comprise the balance valve block 1 that hoists, lifting motor 2, retarder 3, reel 4 and range limiter 5, the described balance valve block 1 that hoists controls the action of lifting motor 2, lifting motor 2 is by the rotation of retarder 3 with movable reel 4, and described range limiter 5 is fixed on reel 4 side and controls to hoist according to the position degree of reel 4 state of balance valve block 1.The present invention sets the stroke of weight-lifting equipment by range limiter 5; When reach capacity position time, cut off by the oil circuit in balance valve block 1 that controls to hoist and enter the fluid of lifting motor 2 and then realize the limit function of this equipment.
In order to improve spacing accuracy and reliability, described retarder 3 comprises brake plate 6, the described balance valve block 1 that hoists comprises three hydraulic fluid ports and is respectively hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port H, and 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 balance valve block 1 that hoists comprises the valve 11 that contends with, shuttle valve 12, change-over valve 13, first check valve 14, second check valve 15, first hydraulic control one-way valve 16 and the second hydraulic control one-way valve 17, be connected with hydraulic fluid port A after the described valve 11 that contends with is in parallel with shuttle valve 12, described hydraulic fluid port A is connected by valve 11 and lifting motor 2 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 2, the drain tap of described lifting motor 2 is connected with hydraulic fluid port H, the oil outlet of described shuttle valve 12 is connected with brake plate 6 and change-over valve 13 respectively, another oil inlet of described shuttle valve 12 is connected with hydraulic fluid port B, the hydraulic fluid port that contends with of the described valve 11 that contends with is connected with hydraulic fluid port B, described first check valve 14 is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the first hydraulic control one-way valve 16, and the first check valve 14 is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, and the first hydraulic control one-way valve 16 is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, described second check valve 15 is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the second hydraulic control one-way valve 17, and the second check valve 15 is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, and the second hydraulic control one-way valve 17 is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, described first hydraulic control one-way valve 16 is connected with change-over valve 13 respectively with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve 17, described another hydraulic fluid port of change-over valve 13 is connected with hydraulic fluid port H, the commutation of described change-over valve 13 is controlled by range limiter 5, and described first hydraulic control one-way valve 16 and the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve 17 can be selected to be connected with the oil outlet of shuttle valve 12 under the effect of change-over valve 13.
The principle of work of the balance valve block that hoists 1: when hoisting, fluid enters in valve body from hydraulic fluid port A, the brake plate 6 of retarder 3 is opened through shuttle valve 12, then through contending with valve 11 Free to A1 point, fluid enters lifting motor 2, and lifting motor 2 rotates, and fluid is other flatly to B1 point from lifting motor 2, then flow out from hydraulic fluid port B, lifting motor 2 draining is from H mouth oil sump tank.When change-over valve 13 encounters upper limit, originally the fluid flowing to brake plate 6 flows to change-over valve 13 through C point, then U point is flowed to through change-over valve 13, flow to the signal port of the second hydraulic control one-way valve 17 again, the second hydraulic control one-way valve 17 is connected, now, fluid flows out through hydraulic fluid port B through the second hydraulic control one-way valve 17 and the second check valve 15 successively from hydraulic fluid port A, therefore lifting motor 2 does not have fluid to pass through, and lifting motor 2 just quits work, and reaches upper limit effect.Otherwise during decline, oil circuit opens the brake plate 6 of retarder 3 through shuttle valve 12 from hydraulic fluid port B, fluid directly enters lifting motor 2, and lifting motor 2 rotates, when normally running, fluid flows out from hydraulic fluid port A through B1 point, A1 point and the valve 11 that contends with successively from hydraulic fluid port B; The valve 11 that now contends with needs to overcome gravity and declines, and plays and prevents hoisting heavy free fall.When change-over valve 13 encounters upper limit, originally the fluid flowing to brake plate 6 flows to change-over valve 13 by C point, then flow to L point through change-over valve 13 successively, then flow to the signal port of the first hydraulic control one-way valve 16, the first hydraulic control one-way valve 16 is connected, now, fluid flows out through hydraulic fluid port A through the first hydraulic control one-way valve 16 and the first check valve 14 successively from hydraulic fluid port B, and therefore lifting motor 2 does not have fluid to pass through, lifting motor 2 just quits work, and reaches lower limit effect.
In reel 4 side, a range limiter 5 is installed, control hoists forced stroke, and then make, with erecting equipment, there is good limit function, accomplish spacing accurately and reliably, be active in one's movements, debug easy, keep in repair easy, durable in use, easy for installation and volume is little, cost is low, practical.
This range limiter 5 can only realize unidirectional spacing, and described reel 4 comprises drum shaft 41; Described change-over valve 13 comprises valve body 131 and contact lever 132; Described range limiter 5 comprises limiting device housing 51, screw rod 52, hits a plate 53, guide rod 54, rocking bar 57 and spacing spheroid 58, described screw rod 52 is connected with drum shaft 41 by screw thread, a described plate 53 rotary type that hits is fixed on screw rod 52 end, described guide rod 54 is fixedly mounted on limiting device housing 51, the center of described guide rod 54 and the center parallel of drum shaft 41, described guide rod 54 is through hitting a plate 53 top; Described rocking bar 57 is fixedly connected with the contact lever 132 of change-over valve 13, and described spacing spheroid 58 is fixed on the upper end of rocking bar 57; A described plate 53 bottom of hitting is provided with the spacing inclined-plane 534 contacted with spacing spheroid 58.
Range limiter 5 principle of work: drum shaft 41 is fixed on reel 4 side, screw rod 52 is threaded connection in drum shaft 41, screw rod 52 and drum shaft 41 synchronous axial system, the distance of motion that hoists and the revolution direct proportionality of reel 4, and drum shaft 41 rotates a circle, in a screw rod 52 just mobile pitch in drum shaft 41 endoporus.Hit a plate 53 and be fixed on screw rod 52 side, screw rod 52 hits a plate 53 constraint by guide rod 54, can not rotate around screw rod 52 axis, be merely able to screw rod 52 movable.Therefore, hoist motion distance just with the distance also direct proportionality hitting a plate 53 movement on screw rod 52.Therefore, when determining a certain qualifying bit postpone hoisted as required, the ultimate range of hitting a plate 53 corresponding permission movement on screw rod 52 just can be calculated.Hitting a plate 53 moves when will surmount this distance, the spacing spheroid 58 be connected on change-over valve 13 will be promoted, and then promote the contact lever 132 of change-over valve 13, hydraulic circuit is connected and namely flows to the first hydraulic control one-way valve 16 or the second hydraulic control one-way valve 17, cause hydraulic oil cannot by lifting motor 2, thus make the stop motion that hoists running to the upper limit or lower position, now spool turns rotates backward only.
Claims (5)
1. a hydraulic hoisting apparatus, comprise the balance valve block that hoists (1), lifting motor (2), retarder (3), reel (4) and range limiter (5), the described balance valve block that hoists (1) controls the action of lifting motor (2), lifting motor (2) is by the rotation of retarder (3) band movable reel (4), described range limiter (5) is fixed on reel (4) side and controls to hoist according to the position degree of reel (4) state of balance valve block (1), it is characterized in that: described retarder (3) comprises brake plate (6), the described balance valve block that hoists (1) comprises three hydraulic fluid ports and is respectively hydraulic fluid port A, hydraulic fluid port B and hydraulic fluid port H, described hydraulic fluid port A and hydraulic fluid port B is the hydraulic fluid port of working connection, described hydraulic fluid port H is motor drain tap, the described balance valve block that hoists (1) comprises the valve that contends with (11), shuttle valve (12), change-over valve (13), first check valve (14), second check valve (15), first hydraulic control one-way valve (16) and the second hydraulic control one-way valve (17), be connected with hydraulic fluid port A after the described valve that contends with (11) is in parallel with shuttle valve (12), described hydraulic fluid port A is connected by the valve that contends with (11) and lifting motor (2) main hydraulic fluid ports, described hydraulic fluid port B is connected with another main hydraulic fluid port of lifting motor (2), the drain tap of described lifting motor (2) is connected with hydraulic fluid port H, the oil outlet of described shuttle valve (12) is connected with brake plate (6) and change-over valve (13) respectively, another oil inlet of described shuttle valve (12) is connected with hydraulic fluid port B, the hydraulic fluid port that contends with of the described valve that contends with (11) is connected with hydraulic fluid port B, described first check valve (14) is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the first hydraulic control one-way valve (16), and the first check valve (14) is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, and the first hydraulic control one-way valve (16) is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, described second check valve (15) is connected between hydraulic fluid port A and hydraulic fluid port B after connecting with the second hydraulic control one-way valve (17), and the second check valve (15) is from hydraulic fluid port A to hydraulic fluid port B one-way conduction, and the second hydraulic control one-way valve (17) is from hydraulic fluid port B to hydraulic fluid port A one-way conduction, described first hydraulic control one-way valve (16) is connected with change-over valve (13) respectively with the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve (17), described change-over valve (13) another hydraulic fluid port is connected with hydraulic fluid port H, the commutation of described change-over valve (13) is controlled by range limiter (5), and described first hydraulic control one-way valve (16) and the hydraulic control hydraulic fluid port of the second hydraulic control one-way valve (17) can be selected to be connected with the oil outlet of shuttle valve (12) under the effect of change-over valve (13),
When hoisting, fluid enters in valve body from hydraulic fluid port A, the brake plate 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 brake plate 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, 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 the brake plate of retarder through shuttle valve from hydraulic fluid port B, 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 brake plate 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, first hydraulic control one-way valve is connected, and 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 lifting motor does not have fluid to pass through, lifting motor just quits work, and reaches lower limit effect.
2. hydraulic hoisting apparatus according to claim 1, is characterized in that: described reel (4) comprises drum shaft (41); Described change-over valve (13) comprises valve body (131) and contact lever (132); Described range limiter (5) comprises limiting device housing (51), screw rod (52), hits a plate (53), guide rod (54), lower limiting board (55), upper limit plate (56) and rocking bar (57), described screw rod (52) is connected with drum shaft (41) by screw thread, a described plate (53) rotary type that hits is fixed on screw rod (52) end, described guide rod (54) is fixedly mounted on limiting device housing (51), the center of described guide rod (54) and the center parallel of drum shaft (41), described guide rod (54) is through hitting a plate (53) top; Described rocking bar (57) is fixedly connected with the contact lever (132) of change-over valve (13), described upper limit plate (56) is fixed on the upper formation of lower limiting board (55) " F " shape structure, and the middle part that described rocking bar (57) is fixed on lower limiting board (55) forms fork configuration; Described bottom of hitting a plate (53) is positioned between lower limiting board (55) and upper limit plate (56).
3. hydraulic hoisting apparatus according to claim 2, it is characterized in that: described lower limiting board (55) comprises the elongate slots (553) on limiting section (551), base plate (552) and base plate (552), described limiting section (551) is vertical with base plate (552), described upper limit plate (56) is fixedly connected with lower limiting board (55) by elongate slots (553), described rocking bar (57) is fixedly connected with lower limiting board (55) by elongate slots (553), and rocking bar (57) junction is positioned between upper limit plate (56) and limiting section (551).
4. hydraulic hoisting apparatus according to claim 2, it is characterized in that: described in hit a plate (53) top be provided with the pilot hole (531) that can pass guide rod (54), described center of hitting a plate (53) is provided with the stepped hole (532) be connected with screw rod (52) rotary type, described in hit a plate (53) bottom be provided with the limited step (533) contacted with upper limit plate (56) with lower limiting board (55).
5. hydraulic hoisting apparatus according to claim 1, is characterized in that: described reel (4) comprises drum shaft (41); Described change-over valve (13) comprises valve body (131) and contact lever (132); Described range limiter (5) comprises limiting device housing (51), screw rod (52), hits a plate (53), guide rod (54), rocking bar (57) and spacing spheroid (58), described screw rod (52) is connected with drum shaft (41) by screw thread, a described plate (53) rotary type that hits is fixed on screw rod (52) end, described guide rod (54) is fixedly mounted on limiting device housing (51), the center of described guide rod (54) and the center parallel of drum shaft (41), described guide rod (54) is through hitting a plate (53) top; Described rocking bar (57) is fixedly connected with the contact lever (132) of change-over valve (13), and described spacing spheroid (58) is fixed on the upper end of rocking bar (57); A described plate (53) bottom of hitting is provided with the spacing inclined-plane (534) contacted with spacing spheroid (58).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210460211.4A CN102963830B (en) | 2012-11-15 | 2012-11-15 | Hydraulic hoisting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210460211.4A CN102963830B (en) | 2012-11-15 | 2012-11-15 | Hydraulic hoisting apparatus |
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| Publication Number | Publication Date |
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| CN102963830A CN102963830A (en) | 2013-03-13 |
| CN102963830B true CN102963830B (en) | 2015-12-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346784A (en) * | 2001-11-13 | 2002-05-01 | 胡世璇 | Hydraulic winch with free release function |
| CN2509165Y (en) * | 2001-11-19 | 2002-09-04 | 辛文阁 | Hydraulic lifting mechanism |
| CN102556875A (en) * | 2012-01-17 | 2012-07-11 | 中国水产科学研究院渔业机械仪器研究所 | Wave compensation system for marine exploration device |
| CN202912604U (en) * | 2012-11-15 | 2013-05-01 | 江苏威和重工有限公司 | Hydraulic hoisting equipment |
-
2012
- 2012-11-15 CN CN201210460211.4A patent/CN102963830B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346784A (en) * | 2001-11-13 | 2002-05-01 | 胡世璇 | Hydraulic winch with free release function |
| CN2509165Y (en) * | 2001-11-19 | 2002-09-04 | 辛文阁 | Hydraulic lifting mechanism |
| CN102556875A (en) * | 2012-01-17 | 2012-07-11 | 中国水产科学研究院渔业机械仪器研究所 | Wave compensation system for marine exploration device |
| CN202912604U (en) * | 2012-11-15 | 2013-05-01 | 江苏威和重工有限公司 | Hydraulic hoisting equipment |
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| Publication number | Publication date |
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| CN102963830A (en) | 2013-03-13 |
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