CN115784050A - Crane single-cylinder bolt telescopic system and crane - Google Patents
Crane single-cylinder bolt telescopic system and crane Download PDFInfo
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- CN115784050A CN115784050A CN202211434876.8A CN202211434876A CN115784050A CN 115784050 A CN115784050 A CN 115784050A CN 202211434876 A CN202211434876 A CN 202211434876A CN 115784050 A CN115784050 A CN 115784050A
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Abstract
The invention discloses a single-cylinder bolt telescopic system of a crane and the crane, wherein the system comprises a hydraulic oil tank, a reversing mechanism, a first hydraulic cylinder, an adjusting mechanism and a second hydraulic cylinder which are sequentially connected; the reversing mechanism is used for switching a connecting oil path between the hydraulic oil tank and the first hydraulic cylinder; the second hydraulic cylinder comprises an arm pin oil cylinder and a cylinder pin oil cylinder, and the adjusting mechanism is used for controlling the communication relation between the first hydraulic cylinder and the arm pin oil cylinder and the cylinder pin oil cylinder; a balance valve and a control mechanism are also arranged between the reversing mechanism and the first hydraulic cylinder, and an oil inlet and an oil outlet of the balance valve are connected in series between the reversing mechanism and the rodless cavity of the first hydraulic cylinder; a control oil port of the balance valve is connected to the control mechanism; according to the invention, an oil pump for controlling oil supply for the cylinder pin and the arm pin is omitted, so that the energy consumption of the system is reduced; the first hydraulic cylinder is only used as an oil return passage of the pull-plug cylinder arm pin system, so that the light design is realized, and meanwhile, the starting responsiveness of the first hydraulic cylinder and the starting stability of the balance valve are ensured through the control mechanism.
Description
Technical Field
The invention relates to a single-cylinder bolt telescopic system of a crane and the crane, and belongs to the technical field of engineering machinery.
Background
The basic form of the single-cylinder bolt telescopic system in the prior industry is as follows: an independent oil supply system is adopted to supply oil to the cylinder head body through the movable core pipe of the telescopic oil cylinder; a cylinder pin and an arm pin are pulled out through an oil cylinder arranged in the cylinder head body, and the cylinder pin and the arm pin are reset by a spring; and the small cavity pressure of the telescopic oil cylinder is utilized to open the balance valve to realize the retraction of the telescopic oil cylinder.
As shown in fig. 1, in order to implement a conventional hydraulic principle of a telescopic system, the extending and retracting actions of the telescopic cylinder 111 are controlled by a variable hydraulic pump 11 in cooperation with a pilot-controlled proportional directional valve 14. When the variable displacement hydraulic pump works, the current output to the variable displacement hydraulic pump 11 by the controller is adjusted to control the displacement, and further the movement speed of the telescopic oil cylinder 111 is controlled. The direction of the oil is changed by reversing the hydraulic control proportional directional valve 14, and the extension and retraction of the telescopic cylinder 111 are switched. The cylinder pin pulling and arm pin pulling actions are completed by another hydraulic system, and oil output by the constant delivery pump 117 passes through the reversing valve 116, the first core pipe 112 in the telescopic oil cylinder and the cylinder arm pin switching valve 113, enters the first cylinder pin oil cylinder 19 or the first arm pin oil cylinder 110, and completes the cylinder pin pulling and arm pin pulling actions. The cylinder/arm pin switching valve 113 controls switching between the cylinder pin pulling operation and the arm pin pulling operation. The fixed displacement pump 117 has an outlet first accumulator 115 for reducing pressure shock when the cylinder pin and the arm pin are pulled out.
The defects of the prior art are as follows: when the telescopic cylinder 111 is telescopic, the flow of the first core pipe 112 is ensured, and the system pressure is ensured, which results in large power loss. The first core pipe 112 bears the oil hydraulic pressure for pulling the cylinder pin and the arm pin, the structural strength requirement is high, and the weight is light and difficult to further promote; meanwhile, at the moment of retraction and starting of the telescopic oil cylinder 111 with the boom, the boom often sinks suddenly due to instantaneous full opening when the balance valve is opened, or the boom retraction does not react for a long time due to slow opening response.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a single-cylinder bolt telescopic system of a crane and the crane, and solves the technical problems that a telescopic oil cylinder is difficult to lighten and response is slow.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a single-cylinder bolt telescopic system of a crane, which comprises a hydraulic oil tank, a reversing mechanism, a first hydraulic cylinder, an adjusting mechanism and a second hydraulic cylinder which are sequentially connected; the first hydraulic cylinder is used for driving a telescopic arm of the crane, and the reversing mechanism is used for switching a connecting oil way between the hydraulic oil tank and the first hydraulic cylinder; the second hydraulic cylinder comprises an arm pin oil cylinder and a cylinder pin oil cylinder which are respectively used for driving an arm pin pulling mechanism and a cylinder pin pulling mechanism of the crane, and the adjusting mechanism is used for controlling the communication relation between the first hydraulic cylinder and the arm pin oil cylinder and between the first hydraulic cylinder and the cylinder pin oil cylinder;
a balance valve and a control mechanism are also arranged between the reversing mechanism and the first hydraulic cylinder, and an oil inlet and an oil outlet of the balance valve are connected in series between the reversing mechanism and the rodless cavity of the first hydraulic cylinder; the control mechanism comprises a first electromagnetic valve, a second electromagnetic valve, a differential pressure control valve, a first damping valve, a second damping valve, a third damping valve, a fourth damping valve, a fifth damping valve and a first overflow valve; a control oil port of the balance valve is connected to a hydraulic oil tank, a core pipe of the first hydraulic cylinder and a first oil port of a first overflow valve through a first damping valve, and a second oil port of the first overflow valve is connected to a rodless cavity of the first hydraulic cylinder; a control oil port of the balance valve is connected to a first oil port and a second oil port of the first electromagnetic valve and the second electromagnetic valve, a rod cavity of the first hydraulic cylinder and a pressure regulating port of the differential pressure control valve through a second damping valve; a control oil port of the balance valve is connected to third oil ports of the first electromagnetic valve and the second electromagnetic valve through a third damping valve and a fourth damping valve; a control oil port of the balance valve is connected to fourth oil ports of the first electromagnetic valve and the second electromagnetic valve; and a first oil port of the differential pressure control valve is connected to a rod cavity of the first hydraulic cylinder through a fifth damping valve, and a second oil port of the differential pressure control valve is connected to a hydraulic oil tank.
Optionally, the first electromagnetic valve is a normally open two-position two-way valve, and the second electromagnetic valve is a normally closed two-position two-way valve.
Optionally, the reversing mechanism includes a hydraulic pump and a first reversing valve, a first oil port of the first reversing valve is connected to the hydraulic oil tank through the hydraulic pump, a second oil port of the first reversing valve is connected to the rodless cavity of the first hydraulic cylinder through a balance valve, and a third oil port and a fourth oil port of the first reversing valve are respectively connected to the hydraulic oil tank and the rod cavity of the first hydraulic cylinder.
Optionally, the reversing mechanism further includes a pilot oil source, a first pressure reducing valve and a second pressure reducing valve, first oil ports of the first pressure reducing valve and the second pressure reducing valve are respectively connected to a first control oil port and a second control oil port of the first reversing valve, and second oil ports and third oil ports of the first pressure reducing valve and the second pressure reducing valve are both connected to the pilot oil source and the hydraulic oil tank.
Optionally, the reversing mechanism further includes a second overflow valve and a third overflow valve, first oil ports of the second overflow valve and the third overflow valve are both connected to the hydraulic oil tank, and second oil ports of the second overflow valve and the third overflow valve are respectively connected to a second oil port and a fourth oil port of the first reversing valve.
Optionally, the reversing mechanism further includes a duplex check valve, and the duplex check valve is connected in series between the fourth oil port of the first reversing valve and the rod cavity of the first hydraulic cylinder.
Optionally, the adjusting mechanism includes an energy accumulator, a fourth overflow valve, a second directional valve, a third directional valve and a sequence valve, the energy accumulator is connected to the rod cavity of the first hydraulic cylinder, the first oil ports of the second directional valve and the third directional valve, and the first oil port of the sequence valve, the energy accumulator is connected to the core tube of the first hydraulic cylinder, the second oil port of the second directional valve and the second oil port of the third directional valve through the fourth overflow valve, the third oil port of the second directional valve is connected to the cylinder pin oil cylinder, the third oil port of the third directional valve is connected to the second oil port of the sequence valve, the third oil port of the sequence valve is connected to the arm pin oil cylinder, and the control oil port of the sequence valve is connected to the core tube of the first hydraulic cylinder.
Optionally, the adjusting mechanism includes a ball valve and a quick connector, and the ball valve and the quick connector are connected in series between the third working oil port of the second reversing valve and the cylinder pin oil cylinder.
Optionally, the adjusting mechanism includes a fourth directional control valve, and a first oil port and a second oil port of the fourth directional control valve are respectively connected to the accumulator and the core tube of the first hydraulic cylinder.
In a second aspect, the invention provides a crane, which comprises the single-cylinder bolt telescopic system of the crane.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a single-cylinder bolt telescopic system of a crane and the crane, which are characterized in that (1) pressure oil in a rod cavity of a first hydraulic cylinder is input into an energy accumulator and used as a hydraulic oil source for pulling a cylinder pin and a boom pin, an oil pump for controlling oil supply for the cylinder pin and the boom pin is omitted, and the energy consumption of the system is reduced; (2) The core tube of the first hydraulic cylinder is only used as an oil return passage of the pull-plug cylinder arm pin system, and does not bear the action of high-pressure oil any more, so that the lightweight design can be carried out, and the reliability of the design can be ensured; (3) The control mechanism ensures the opening responsiveness of the first hydraulic cylinder at different oil temperatures, and reduces the impact, thereby improving the opening stability of the balance valve.
Drawings
FIG. 1 is a schematic diagram of a prior art hydraulic principle of a telescoping system provided in the background art;
FIG. 2 is a schematic view of a single cylinder bolt telescopic system of a crane according to an embodiment of the present invention;
labeled in the figure as:
11. the hydraulic control system comprises a variable hydraulic pump, 14, a hydraulic control proportional reversing valve, 19, a first cylinder pin oil cylinder, 110, a first arm pin oil cylinder, 111, a telescopic oil cylinder, 112, a first core pipe, 113, a cylinder arm pin switching valve, 115, a first energy accumulator, 116, a reversing valve, 117 and a fixed displacement pump;
1. the hydraulic control system comprises a hydraulic oil tank, 2, a reversing mechanism, 21, a hydraulic pump, 22, a first reversing valve, 23, a first pressure reducing valve, 24, a second pressure reducing valve, 25, a second overflow valve, 26, a third overflow valve, 27, a duplex one-way valve, 3, a first hydraulic cylinder, 4, a regulating mechanism, 41, an accumulator, 42, a fourth overflow valve, 43, a second reversing valve, 44, a third reversing valve, 45, a sequence valve, 46, a ball valve, 47, a quick connector, 48, a fourth reversing valve, 5, a second hydraulic cylinder, 51, an arm pin oil cylinder, 52, a cylinder pin oil cylinder, 6, a balance valve, 7, a control mechanism, 71, a first electromagnetic valve, 72, a second electromagnetic valve, 73, a differential pressure control valve, 74, a first damping valve, 75, a second damping valve, 76, a third damping valve, 77, a fourth damping valve, 78, a fifth damping valve, 79 and a first overflow valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
as shown in FIG. 2, the invention provides a single-cylinder bolt telescopic system of a crane, which comprises a hydraulic oil tank 1, a reversing mechanism 2, a first hydraulic cylinder 3, an adjusting mechanism 4 and a second hydraulic cylinder 5 which are connected in sequence; the first hydraulic cylinder 3 is used for driving a telescopic arm of the crane, and the reversing mechanism 2 is used for switching a connecting oil way between the hydraulic oil tank 1 and the first hydraulic cylinder 3; the second hydraulic cylinder 5 comprises a boom pin cylinder 51 and a cylinder pin cylinder 52 for driving a boom pin pulling mechanism and a cylinder pin pulling mechanism of the crane, respectively, and the adjusting mechanism 4 is used for controlling the communication relationship between the first hydraulic cylinder 3 and the boom pin cylinder 51 and the cylinder pin cylinder 52.
(1) A balance valve 6 and a control mechanism 7 are also arranged between the reversing mechanism 2 and the first hydraulic cylinder 3, and an oil inlet and an oil outlet of the balance valve 6 are connected in series between the reversing mechanism 2 and a rodless cavity of the first hydraulic cylinder 3; the control mechanism 7 includes a first solenoid valve 71, a second solenoid valve 72, a differential pressure control valve 73, a first damping valve 74, a second damping valve 75, a third damping valve 76, a fourth damping valve 77, a fifth damping valve 78, and a first relief valve 79; (the first electromagnetic valve 71 adopts a normally open two-position two-way valve, and the second electromagnetic valve 72 adopts a normally closed two-position two-way valve), the control oil port of the balance valve 6 is connected to the hydraulic oil tank 1, the core pipe of the first hydraulic cylinder 3 and the first oil port of the first overflow valve 79 through the first damping valve 74, and the second oil port of the first overflow valve 79 is connected to the rodless cavity of the first hydraulic cylinder 3; the control oil port of the balance valve 6 is connected to the first and second oil ports of the first and second electromagnetic valves 71 and 72, the rod chamber of the first hydraulic cylinder 3, and the pressure regulating port of the differential pressure control valve 73 through the second damping valve 75; the control oil port of the balance valve 6 is connected to the third oil ports of the first solenoid valve 71 and the second solenoid valve 72 through the third damping valve 76 and the fourth damping valve 77; the control oil port of the balance valve 6 is connected to the fourth oil ports of the first solenoid valve 71 and the second solenoid valve 72; a first port of the differential pressure control valve 73 is connected to the rod chamber of the first hydraulic cylinder 3 through the fifth damping valve 78, and a second port of the differential pressure control valve 73 is connected to the hydraulic oil tank 1.
The working principle of the balance valve 6 and the control mechanism 7 is as follows:
when the first hydraulic cylinder 3 starts with the boom retraction, the boom is usually suddenly sunk due to instantaneous full opening when the balance valve 6 is opened, or the boom retraction does not react for a long time due to slow opening response.
The control mechanism 7 controls the oil way for opening the balance valve to control the opening speed and the opening size of the balance valve:
1) When the instantaneous pressure impact is large, the pressure difference between both ends of the fifth damping valve 78 is large, and the pressure difference control valve 73 is opened to absorb the instantaneous impact.
2) When the oil temperature is lower, the pressure difference between the two ends of the second damping valve 75 is larger, the second electromagnetic valve 72 is opened, oil is supplied to the pilot port of the balance valve 6, the flow is increased, and the opening responsiveness of the balance valve 6 is improved.
3) When the oil temperature is particularly high, the pressure difference between the two ends of the second damping valve 75 is small, the first electromagnetic valve 71 is closed, oil is not supplied to the pilot port of the balance valve 6, the flow rate is reduced, and the opening responsiveness of the balance valve is reduced, so that the impact is reduced.
4) The third and fourth damping valves 76 and 77 are used to absorb pressure shocks at the outlets of the first and second solenoid valves 71 and 72. The first damping valve 74 bypasses the oil to the hydraulic oil tank 1 for damping the shock of the pilot port of the balance valve 6.
5) The control mechanism ensures the opening responsiveness under different oil temperatures and reduces the impact, thereby improving the opening stability of the balance valve 6.
(2) The reversing mechanism 2 comprises a hydraulic pump 21 and a first reversing valve 22, a first oil port of the first reversing valve 22 is connected to the hydraulic oil tank 1 through the hydraulic pump 21, a second oil port of the first reversing valve 22 is connected to a rodless cavity of the first hydraulic cylinder 3 through the balance valve 6, and a third oil port and a fourth oil port of the first reversing valve 22 are respectively connected to the hydraulic oil tank 1 and a rod cavity of the first hydraulic cylinder 3. The reversing mechanism 2 further comprises a pilot oil source, a first reducing valve 23 and a second reducing valve 24, first oil ports of the first reducing valve 23 and the second reducing valve 24 are respectively connected to a first control oil port and a second control oil port of the first reversing valve 22, and second oil ports and third oil ports of the first reducing valve 23 and the second reducing valve 24 are both connected to the pilot oil source and the hydraulic oil tank 1.
The control principle of the reversing mechanism 2 and the first hydraulic cylinder 3 is as follows:
when the first pressure reducing valve 23 is powered on, the oil output by the hydraulic pump 21 sequentially passes through the left position (the first oil port and the second oil port) of the first reversing valve 22 and the balance valve 6 to enter the rodless cavity of the first hydraulic cylinder 3, the oil in the rod cavity of the first hydraulic cylinder 3 returns through the third oil port and the fourth oil port of the first reversing valve 22, and the high-pressure oil pushes the piston rod to extend out.
When the second pressure reducing valve 24 is powered, oil output by the hydraulic pump 21 sequentially passes through the right position (the third oil port and the fourth oil port) of the first reversing valve 22 and the balance valve 6 to enter the rod cavity of the first hydraulic cylinder 3, the high-pressure oil pushes the balance valve 6 to reverse, the oil in the rodless cavity of the first hydraulic cylinder 3 returns, and the high-pressure oil in the rod cavity of the first hydraulic cylinder 3 pushes the piston rod to retract.
The current of the input hydraulic pump 21 is controlled, the displacement of the pump can be changed, so that the speed of the first hydraulic cylinder 3 is adjusted, and the requirements of different working conditions of the telescopic system on the speed of the telescopic oil cylinder are met.
The reversing mechanism 2 further comprises a second overflow valve 25 and a third overflow valve 26, first oil ports of the second overflow valve 25 and the third overflow valve 26 are both connected to the hydraulic oil tank 1, and second oil ports of the second overflow valve 25 and the third overflow valve 26 are respectively connected to a second oil port and a fourth oil port of the first reversing valve 22. The second overflow valve 25 and the third overflow valve 26 respectively control the maximum pressure in the rodless cavity and the rod cavity of the first hydraulic cylinder 3, and damage to the telescopic cylinder caused by overhigh system pressure is avoided.
The reversing mechanism 2 further comprises a duplex one-way valve 27, and the duplex one-way valve 27 is connected in series between the fourth oil port of the first reversing valve 22 and the rod cavity of the first hydraulic cylinder 3. The duplex check valve 27 can keep the oil liquid in the rod cavity of the first hydraulic cylinder 3 to maintain a certain pressure, thereby shortening the pressure building time of the rod cavity of the first hydraulic cylinder 3 and improving the responsiveness.
(3) The adjusting mechanism 4 comprises an energy accumulator 41, a fourth overflow valve 42, a second reversing valve 43, a third reversing valve 44 and a sequence valve 45, wherein the energy accumulator 41 is respectively connected to a rod cavity of the first hydraulic cylinder 3, first oil ports of the second reversing valve 43 and the third reversing valve 44, and a first oil port of the sequence valve 45, the energy accumulator 41 is respectively connected to a core tube of the first hydraulic cylinder 3, second oil ports of the second reversing valve 43 and the third reversing valve 44 through the fourth overflow valve 42, a third oil port of the second reversing valve 43 is connected to a cylinder pin oil cylinder 52, a third oil port of the third reversing valve 44 is connected to a second oil port of the sequence valve 45, a third oil port of the sequence valve 45 is connected to an arm pin oil cylinder 51, and a control oil port of the sequence valve 45 is connected to the core tube of the first hydraulic cylinder 3.
The control principle of the adjusting mechanism 4 and the second hydraulic cylinder 5 is as follows:
when the first hydraulic cylinder 3 performs the retracting action, the high-pressure oil in the rodless chamber charges the accumulator 41. The accumulator 41, which is filled completely, serves as an oil source for the second hydraulic cylinder 5. The third direction changing valve 44 and the second direction changing valve 43 control the on/off of the accumulator 41 and the arm pin cylinder 51 and the cylinder pin cylinder 52, respectively.
When the third reversing valve 44 is energized and the second reversing valve 43 is not energized, high-pressure oil in the energy accumulator 41 enters the arm pin oil cylinder 51 through the third reversing valve 44 and the left position (the second oil port and the third oil port) of the sequence valve 45, the oil pushes the piston rod of the arm pin oil cylinder 51 to extend out, the arm pin pulling mechanism is pushed to move, and arm pin pulling action is achieved.
When the second reversing valve 43 is powered on and the third reversing valve 44 is not powered on, high-pressure oil in the energy accumulator 41 enters the cylinder pin oil cylinder 52 through the second reversing valve 43, and the oil pushes a piston rod of the cylinder pin oil cylinder 52 to extend out, so that the cylinder pin pulling mechanism is pushed to act, and the cylinder pin pulling action is realized.
When the arm pin is pulled out in an emergency, the pressure of the system is increased, the sequence valve 45 is reversed, and high-pressure oil enters the arm pin oil cylinder 51, so that the arm pin is pulled out.
When the second reversing valve 43 or the third reversing valve 44 is powered off, the cylinder pin oil cylinder 52 or the arm pin oil cylinder 51 is reset under the action of the spring, and oil in a large cavity of the cylinder pin oil cylinder 52 or the arm pin oil cylinder 51 is drained through a core pipe in the first hydraulic cylinder 3. Since the core tube directly communicates the hydraulic oil tank with the cylinder pin oil cylinder 52 and the arm pin oil cylinder 51, the oil path oil drainage resistance is small, and the response of releasing the cylinder pin and the arm pin is fast.
The adjusting mechanism 4 comprises a ball valve 46 and a quick-connect plug 47, and the ball valve 46 and the quick-connect plug 47 are connected in series between the third working oil port of the second direction valve 43 and the cylinder pin oil cylinder 52. When the cylinder pin is pulled out in an emergency, the ball valve 46 is closed, the high-pressure oil source is connected externally through the quick connector 47, and the high-pressure oil reaches the cylinder pin oil cylinder 52, so that the cylinder pin is pulled out in an emergency.
The adjusting mechanism 4 includes a fourth direction valve 48, and a first oil port and a second oil port of the fourth direction valve 48 are connected to the accumulator 41 and the core tube of the first hydraulic cylinder 3, respectively. When the energy accumulator 41 is maintained and replaced or the second reversing valve 43 and the third reversing valve 44 are maintained, the fourth reversing valve 48 is electrified, high-pressure oil in the energy accumulator 41 is released, and the safety of the cylinder pin system during maintenance is guaranteed.
In addition, a pressure sensor may be connected to the accumulator 41, and when the pressure in the accumulator 41 is too high due to temperature rise or system pressure abnormality, high-pressure oil will overflow from the fourth overflow valve 42, thereby protecting the arm pin system from damage. When the pressure is below the set point, the system automatically charges the accumulator 41.
A check valve is arranged on a connecting oil path of the accumulator 41 and the rod cavity of the first hydraulic cylinder 3, and the flow direction of the check valve is that the accumulator 41 flows to the rod cavity of the first hydraulic cylinder 3. The one-way valve separates the rod cavity of the first hydraulic cylinder 3 from the energy accumulator 41, so that high-pressure oil in the rod cavity of the first hydraulic cylinder 3 fills the energy accumulator 41, and the high-pressure oil in the energy accumulator 41 is prevented from entering the rod cavity of the first hydraulic cylinder 3.
The second embodiment:
based on the first embodiment, the embodiment of the invention provides a crane, which comprises the single-cylinder bolt telescopic system of the crane. The positive technical effects of the single-cylinder bolt telescopic system of the crane in the above embodiments are also applicable to the crane, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (10)
1. A single-cylinder bolt telescopic system of a crane is characterized by comprising a hydraulic oil tank, a reversing mechanism, a first hydraulic cylinder, an adjusting mechanism and a second hydraulic cylinder which are sequentially connected; the first hydraulic cylinder is used for driving a telescopic arm of the crane, and the reversing mechanism is used for switching a connecting oil way between the hydraulic oil tank and the first hydraulic cylinder; the second hydraulic cylinder comprises an arm pin oil cylinder and a cylinder pin oil cylinder which are respectively used for driving an arm pin pulling mechanism and a cylinder pin pulling mechanism of the crane, and the adjusting mechanism is used for controlling the communication relation between the first hydraulic cylinder and the arm pin oil cylinder and between the first hydraulic cylinder and the cylinder pin oil cylinder;
a balance valve and a control mechanism are also arranged between the reversing mechanism and the first hydraulic cylinder, and an oil inlet and an oil outlet of the balance valve are connected in series between the reversing mechanism and the rodless cavity of the first hydraulic cylinder; the control mechanism comprises a first electromagnetic valve, a second electromagnetic valve, a differential pressure control valve, a first damping valve, a second damping valve, a third damping valve, a fourth damping valve, a fifth damping valve and a first overflow valve; a control oil port of the balance valve is connected to a hydraulic oil tank, a core pipe of the first hydraulic cylinder and a first oil port of a first overflow valve through a first damping valve, and a second oil port of the first overflow valve is connected to a rodless cavity of the first hydraulic cylinder; a control oil port of the balance valve is connected to a first oil port and a second oil port of the first electromagnetic valve and the second electromagnetic valve, a rod cavity of the first hydraulic cylinder and a pressure regulating port of the differential pressure control valve through a second damping valve; a control oil port of the balance valve is connected to third oil ports of the first electromagnetic valve and the second electromagnetic valve through a third damping valve and a fourth damping valve; a control oil port of the balance valve is connected to fourth oil ports of the first electromagnetic valve and the second electromagnetic valve; and a first oil port of the differential pressure control valve is connected to a rod cavity of the first hydraulic cylinder through a fifth damping valve, and a second oil port of the differential pressure control valve is connected to a hydraulic oil tank.
2. The single cylinder bolt telescopic system of crane as claimed in claim 1, wherein the first solenoid valve is a normally open two-position two-way valve, and the second solenoid valve is a normally closed two-position two-way valve.
3. The single cylinder bolt telescoping system of the crane of claim 1, wherein the reversing mechanism comprises a hydraulic pump and a first reversing valve, the first oil port of the first reversing valve is connected to a hydraulic oil tank through the hydraulic pump, the second oil port of the first reversing valve is connected to the rodless cavity of the first hydraulic cylinder through a balance valve, and the third oil port and the fourth oil port of the first reversing valve are respectively connected to the hydraulic oil tank and the rod cavity of the first hydraulic cylinder.
4. The single cylinder bolt telescopic system of the crane as claimed in claim 3, wherein the reversing mechanism further comprises a pilot oil source, a first pressure reducing valve and a second pressure reducing valve, the first oil ports of the first pressure reducing valve and the second pressure reducing valve are respectively connected to the first control oil port and the second control oil port of the first reversing valve, and the second oil port and the third oil port of the first pressure reducing valve and the second pressure reducing valve are respectively connected to the pilot oil source and the hydraulic oil tank.
5. The single cylinder bolt telescopic system of the crane as claimed in claim 3, wherein the reversing mechanism further comprises a second overflow valve and a third overflow valve, the first oil ports of the second overflow valve and the third overflow valve are both connected to the hydraulic oil tank, and the second oil ports of the second overflow valve and the third overflow valve are respectively connected to the second oil port and the fourth oil port of the first reversing valve.
6. The single cylinder bolt telescoping system of crane of claim 3, wherein the reversing mechanism further comprises a double check valve connected in series between the fourth port of the first reversing valve and the rod chamber of the first hydraulic cylinder.
7. The single-cylinder bolt telescopic system of the crane according to claim 1, wherein the adjusting mechanism comprises an energy accumulator, a fourth overflow valve, a second reversing valve, a third reversing valve and a sequence valve, the energy accumulator is connected to the rod cavity of the first hydraulic cylinder, the first oil ports of the second reversing valve and the third reversing valve and the first oil port of the sequence valve respectively, the energy accumulator is connected to the core tube of the first hydraulic cylinder, the second oil port of the second reversing valve and the second oil port of the third reversing valve respectively through the fourth overflow valve, the third oil port of the second reversing valve is connected to the cylinder pin cylinder, the third oil port of the third reversing valve is connected to the second oil port of the sequence valve, the third oil port of the sequence valve is connected to the arm pin cylinder, and the control oil port of the sequence valve is connected to the core tube of the first hydraulic cylinder.
8. The telescopic system of a single cylinder plug of a crane according to claim 7, wherein the adjusting mechanism comprises a ball valve and a quick connector, and the ball valve and the quick connector are connected in series between the third working oil port of the second directional control valve and the cylinder pin oil cylinder.
9. The crane single cylinder bolt telescoping system of claim 7, wherein the adjusting mechanism comprises a fourth directional control valve, the first oil port and the second oil port of the fourth directional control valve being connected to the accumulator and the core tube of the first hydraulic cylinder, respectively.
10. A crane comprising a single cylinder plug retraction system for a crane as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211434876.8A CN115784050A (en) | 2022-11-16 | 2022-11-16 | Crane single-cylinder bolt telescopic system and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211434876.8A CN115784050A (en) | 2022-11-16 | 2022-11-16 | Crane single-cylinder bolt telescopic system and crane |
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| Publication Number | Publication Date |
|---|---|
| CN115784050A true CN115784050A (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211434876.8A Pending CN115784050A (en) | 2022-11-16 | 2022-11-16 | Crane single-cylinder bolt telescopic system and crane |
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| CN (1) | CN115784050A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116834061A (en) * | 2023-08-30 | 2023-10-03 | 之江实验室 | Digital hydraulic joint actuator and robot |
-
2022
- 2022-11-16 CN CN202211434876.8A patent/CN115784050A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116834061A (en) * | 2023-08-30 | 2023-10-03 | 之江实验室 | Digital hydraulic joint actuator and robot |
| CN116834061B (en) * | 2023-08-30 | 2023-12-26 | 之江实验室 | Digital hydraulic joint actuator and robot |
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